VBoxCPP.cpp@ 106724

Last change on this file since 106724 was 106061, checked in by vboxsync, 2 months ago
Copyright year updates by scm.
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1	/* $Id: VBoxCPP.cpp 106061 2024-09-16 14:03:52Z vboxsync $ */
2	/** @file
3	* VBox Build Tool - A mini C Preprocessor.
4	*
5	* Purposes to which this preprocessor will be put:
6	* - Preprocessig vm.h into dtrace/lib/vm.d so we can access the VM
7	* structure (as well as substructures) from DTrace without having
8	* to handcraft it all.
9	* - Removing \#ifdefs relating to a new feature that has become
10	* stable and no longer needs \#ifdef'ing.
11	* - Pretty printing preprocessor directives. This will be used by
12	* SCM.
13	*/
14
15	/*
16	* Copyright (C) 2012-2024 Oracle and/or its affiliates.
17	*
18	* This file is part of VirtualBox base platform packages, as
19	* available from https://www.virtualbox.org.
20	*
21	* This program is free software; you can redistribute it and/or
22	* modify it under the terms of the GNU General Public License
23	* as published by the Free Software Foundation, in version 3 of the
24	* License.
25	*
26	* This program is distributed in the hope that it will be useful, but
27	* WITHOUT ANY WARRANTY; without even the implied warranty of
28	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
29	* General Public License for more details.
30	*
31	* You should have received a copy of the GNU General Public License
32	* along with this program; if not, see <https://www.gnu.org/licenses>.
33	*
34	* SPDX-License-Identifier: GPL-3.0-only
35	*/
36
37
38	/*********************************************************************************************************************************
39	* Header Files *
40	*********************************************************************************************************************************/
41	#include <VBox/VBoxTpG.h>
42
43	#include <iprt/alloca.h>
44	#include <iprt/assert.h>
45	#include <iprt/asm.h>
46	#include <iprt/ctype.h>
47	#include <iprt/err.h>
48	#include <iprt/file.h>
49	#include <iprt/getopt.h>
50	#include <iprt/initterm.h>
51	#include <iprt/list.h>
52	#include <iprt/mem.h>
53	#include <iprt/message.h>
54	#include <iprt/path.h>
55	#include <iprt/stream.h>
56	#include <iprt/string.h>
57
58	#include "scmstream.h"
59
60
61	/*********************************************************************************************************************************
62	* Defined Constants And Macros *
63	*********************************************************************************************************************************/
64	/** The bitmap type. */
65	#define VBCPP_BITMAP_TYPE uint64_t
66	/** The bitmap size as a multiple of VBCPP_BITMAP_TYPE. */
67	#define VBCPP_BITMAP_SIZE (128 / 64)
68	/** Checks if a bit is set. */
69	#define VBCPP_BITMAP_IS_SET(a_bm, a_ch) ASMBitTest(a_bm, (a_ch) & 0x7f)
70	/** Sets a bit. */
71	#define VBCPP_BITMAP_SET(a_bm, a_ch) ASMBitSet(a_bm, (a_ch) & 0x7f)
72	/** Empties the bitmap. */
73	#define VBCPP_BITMAP_EMPTY(a_bm) do { (a_bm)[0] = 0; (a_bm)[1] = 0; } while (0)
74	/** Joins to bitmaps by OR'ing their values.. */
75	#define VBCPP_BITMAP_OR(a_bm1, a_bm2) do { (a_bm1)[0] \|= (a_bm2)[0]; (a_bm1)[1] \|= (a_bm2)[1]; } while (0)
76
77
78	/*********************************************************************************************************************************
79	* Structures and Typedefs *
80	*********************************************************************************************************************************/
81	/** Pointer to the C preprocessor instance data. */
82	typedef struct VBCPP *PVBCPP;
83
84
85	/**
86	* Variable string buffer (very simple version of SCMSTREAM).
87	*/
88	typedef struct VBCPPSTRBUF
89	{
90	/** The preprocessor instance (for error reporting). */
91	struct VBCPP *pThis;
92	/** The length of the string in the buffer. */
93	size_t cchBuf;
94	/** The string storage. */
95	char *pszBuf;
96	/** Allocated buffer space. */
97	size_t cbBufAllocated;
98	} VBCPPSTRBUF;
99	/** Pointer to a variable string buffer. */
100	typedef VBCPPSTRBUF *PVBCPPSTRBUF;
101
102
103	/**
104	* The preprocessor mode.
105	*/
106	typedef enum VBCPPMODE
107	{
108	kVBCppMode_Invalid = 0,
109	kVBCppMode_Standard,
110	kVBCppMode_Selective,
111	kVBCppMode_SelectiveD,
112	kVBCppMode_End
113	} VBCPPMODE;
114
115
116	/**
117	* A macro (aka define).
118	*/
119	typedef struct VBCPPMACRO
120	{
121	/** The string space core. */
122	RTSTRSPACECORE Core;
123	#if 0
124	/** For linking macros that have the fExpanding flag set. */
125	struct VBCPPMACRO *pUpExpanding;
126	#endif
127	/** Whether it's a function. */
128	bool fFunction;
129	/** Variable argument count. */
130	bool fVarArg;
131	/** Set if originating on the command line. */
132	bool fCmdLine;
133	/** Set if this macro is currently being expanded and should not be
134	* recursively applied. */
135	bool fExpanding;
136	/** The number of known arguments. */
137	uint32_t cArgs;
138	/** Pointer to a list of argument names. */
139	const char **papszArgs;
140	/** Lead character bitmap for the argument names. */
141	VBCPP_BITMAP_TYPE bmArgs[VBCPP_BITMAP_SIZE];
142	/** The value length. */
143	size_t cchValue;
144	/** The define value. (This is followed by the name and arguments.) */
145	char szValue[1];
146	} VBCPPMACRO;
147	/** Pointer to a macro. */
148	typedef VBCPPMACRO *PVBCPPMACRO;
149
150
151	/**
152	* Macro expansion data.
153	*/
154	typedef struct VBCPPMACROEXP
155	{
156	/** The expansion buffer. */
157	VBCPPSTRBUF StrBuf;
158	#if 0
159	/** List of expanding macros (Stack). */
160	PVBCPPMACRO pMacroStack;
161	#endif
162	/** The input stream (in case we want to look for parameter lists). */
163	PSCMSTREAM pStrmInput;
164	/** Array of argument values. Used when expanding function style macros. */
165	char **papszArgs;
166	/** The number of argument values current in papszArgs. */
167	uint32_t cArgs;
168	/** The number of argument values papszArgs can currently hold */
169	uint32_t cArgsAlloced;
170	} VBCPPMACROEXP;
171	/** Pointer to macro expansion data. */
172	typedef VBCPPMACROEXP *PVBCPPMACROEXP;
173
174
175	/**
176	* The vbcppMacroExpandReScan mode of operation.
177	*/
178	typedef enum VBCPPMACRORESCANMODE
179	{
180	/** Invalid mode. */
181	kMacroReScanMode_Invalid = 0,
182	/** Normal expansion mode. */
183	kMacroReScanMode_Normal,
184	/** Replaces known macros and heeds the 'defined' operator. */
185	kMacroReScanMode_Expression,
186	/** End of valid modes. */
187	kMacroReScanMode_End
188	} VBCPPMACRORESCANMODE;
189
190
191	/**
192	* Expression node type.
193	*/
194	typedef enum VBCPPEXPRKIND
195	{
196	kVBCppExprKind_Invalid = 0,
197	kVBCppExprKind_Unary,
198	kVBCppExprKind_Binary,
199	kVBCppExprKind_Ternary,
200	kVBCppExprKind_SignedValue,
201	kVBCppExprKind_UnsignedValue,
202	kVBCppExprKind_UndefMacroCall,
203	kVBCppExprKind_End
204	} VBCPPEXPRKIND;
205
206
207	/** Macro used for the precedence field. */
208	#define VBCPPOP_PRECEDENCE(a_iPrecedence) ((a_iPrecedence) << 8)
209	/** Mask for getting the precedence field value. */
210	#define VBCPPOP_PRECEDENCE_MASK 0xff00
211	/** Operator associativity - Left to right. */
212	#define VBCPPOP_L2R (1 << 16)
213	/** Operator associativity - Right to left. */
214	#define VBCPPOP_R2L (2 << 16)
215
216	/**
217	* Unary operators.
218	*/
219	typedef enum VBCPPUNARYOP
220	{
221	kVBCppUnaryOp_Invalid = 0,
222	kVBCppUnaryOp_Pluss = VBCPPOP_R2L \| VBCPPOP_PRECEDENCE( 3) \| 5,
223	kVBCppUnaryOp_Minus = VBCPPOP_R2L \| VBCPPOP_PRECEDENCE( 3) \| 6,
224	kVBCppUnaryOp_LogicalNot = VBCPPOP_R2L \| VBCPPOP_PRECEDENCE( 3) \| 7,
225	kVBCppUnaryOp_BitwiseNot = VBCPPOP_R2L \| VBCPPOP_PRECEDENCE( 3) \| 8,
226	kVBCppUnaryOp_Parenthesis = VBCPPOP_R2L \| VBCPPOP_PRECEDENCE(15) \| 9,
227	kVBCppUnaryOp_End
228	} VBCPPUNARYOP;
229
230	/**
231	* Binary operators.
232	*/
233	typedef enum VBCPPBINARYOP
234	{
235	kVBCppBinary_Invalid = 0,
236	kVBCppBinary_Multiplication = VBCPPOP_L2R \| VBCPPOP_PRECEDENCE( 5) \| 2,
237	kVBCppBinary_Division = VBCPPOP_L2R \| VBCPPOP_PRECEDENCE( 5) \| 4,
238	kVBCppBinary_Modulo = VBCPPOP_L2R \| VBCPPOP_PRECEDENCE( 5) \| 5,
239	kVBCppBinary_Addition = VBCPPOP_L2R \| VBCPPOP_PRECEDENCE( 6) \| 6,
240	kVBCppBinary_Subtraction = VBCPPOP_L2R \| VBCPPOP_PRECEDENCE( 6) \| 7,
241	kVBCppBinary_LeftShift = VBCPPOP_L2R \| VBCPPOP_PRECEDENCE( 7) \| 8,
242	kVBCppBinary_RightShift = VBCPPOP_L2R \| VBCPPOP_PRECEDENCE( 7) \| 9,
243	kVBCppBinary_LessThan = VBCPPOP_L2R \| VBCPPOP_PRECEDENCE( 8) \| 10,
244	kVBCppBinary_LessThanOrEqual = VBCPPOP_L2R \| VBCPPOP_PRECEDENCE( 8) \| 11,
245	kVBCppBinary_GreaterThan = VBCPPOP_L2R \| VBCPPOP_PRECEDENCE( 8) \| 12,
246	kVBCppBinary_GreaterThanOrEqual = VBCPPOP_L2R \| VBCPPOP_PRECEDENCE( 8) \| 13,
247	kVBCppBinary_EqualTo = VBCPPOP_L2R \| VBCPPOP_PRECEDENCE( 9) \| 14,
248	kVBCppBinary_NotEqualTo = VBCPPOP_L2R \| VBCPPOP_PRECEDENCE( 9) \| 15,
249	kVBCppBinary_BitwiseAnd = VBCPPOP_L2R \| VBCPPOP_PRECEDENCE(10) \| 16,
250	kVBCppBinary_BitwiseXor = VBCPPOP_L2R \| VBCPPOP_PRECEDENCE(11) \| 17,
251	kVBCppBinary_BitwiseOr = VBCPPOP_L2R \| VBCPPOP_PRECEDENCE(12) \| 18,
252	kVBCppBinary_LogicalAnd = VBCPPOP_L2R \| VBCPPOP_PRECEDENCE(13) \| 19,
253	kVBCppBinary_LogicalOr = VBCPPOP_L2R \| VBCPPOP_PRECEDENCE(14) \| 20,
254	kVBCppBinary_End
255	} VBCPPBINARYOP;
256
257	/** The precedence of the ternary operator (expr ? true : false). */
258	#define VBCPPTERNAROP_PRECEDENCE VBCPPOP_PRECEDENCE(16)
259
260
261	/** Pointer to an expression parsing node. */
262	typedef struct VBCPPEXPR *PVBCPPEXPR;
263	/**
264	* Expression parsing node.
265	*/
266	typedef struct VBCPPEXPR
267	{
268	/** Parent expression. */
269	PVBCPPEXPR pParent;
270	/** Whether the expression is complete or not. */
271	bool fComplete;
272	/** The kind of expression. */
273	VBCPPEXPRKIND enmKind;
274	/** Kind specific content. */
275	union
276	{
277	/** kVBCppExprKind_Unary */
278	struct
279	{
280	VBCPPUNARYOP enmOperator;
281	PVBCPPEXPR pArg;
282	} Unary;
283
284	/** kVBCppExprKind_Binary */
285	struct
286	{
287	VBCPPBINARYOP enmOperator;
288	PVBCPPEXPR pLeft;
289	PVBCPPEXPR pRight;
290	} Binary;
291
292	/** kVBCppExprKind_Ternary */
293	struct
294	{
295	PVBCPPEXPR pExpr;
296	PVBCPPEXPR pTrue;
297	PVBCPPEXPR pFalse;
298	} Ternary;
299
300	/** kVBCppExprKind_SignedValue */
301	struct
302	{
303	int64_t s64;
304	} SignedValue;
305
306	/** kVBCppExprKind_UnsignedValue */
307	struct
308	{
309	uint64_t u64;
310	} UnsignedValue;
311
312	/** kVBCppExprKind_UndefMacroCall */
313	struct
314	{
315	char *pszName;
316	size_t cArgs;
317	PVBCPPEXPR *papArgs;
318	} UndefMacroCall;
319	} u;
320	} VBCPPEXPR;
321
322
323	/**
324	* Operator return statuses.
325	*/
326	typedef enum VBCPPEXPRRET
327	{
328	kExprRet_Error = -1,
329	kExprRet_Ok = 0,
330	kExprRet_UnaryOperator,
331	kExprRet_Value,
332	kExprRet_EndOfExpr,
333	kExprRet_End
334	} VBCPPEXPRRET;
335
336	/**
337	* Expression parser context.
338	*/
339	typedef struct VBCPPEXPRPARSER
340	{
341	/** The current expression posistion. */
342	const char *pszCur;
343	/** The root node. */
344	PVBCPPEXPR pRoot;
345	/** The current expression node. */
346	PVBCPPEXPR pCur;
347	/** Where to insert the next expression. */
348	PVBCPPEXPR *ppCur;
349	/** The expression. */
350	const char *pszExpr;
351	/** The number of undefined macros we've encountered while parsing. */
352	size_t cUndefined;
353	/** Pointer to the C preprocessor instance. */
354	PVBCPP pThis;
355	} VBCPPEXPRPARSER;
356	/** Pointer to an expression parser context. */
357	typedef VBCPPEXPRPARSER *PVBCPPEXPRPARSER;
358
359
360	/**
361	* Evaluation result.
362	*/
363	typedef enum VBCPPEVAL
364	{
365	kVBCppEval_Invalid = 0,
366	kVBCppEval_True,
367	kVBCppEval_False,
368	kVBCppEval_Undecided,
369	kVBCppEval_End
370	} VBCPPEVAL;
371
372
373	/**
374	* The condition kind.
375	*/
376	typedef enum VBCPPCONDKIND
377	{
378	kVBCppCondKind_Invalid = 0,
379	/** \#if expr */
380	kVBCppCondKind_If,
381	/** \#ifdef define */
382	kVBCppCondKind_IfDef,
383	/** \#ifndef define */
384	kVBCppCondKind_IfNDef,
385	/** \#elif expr */
386	kVBCppCondKind_ElIf,
387	/** The end of valid values. */
388	kVBCppCondKind_End
389	} VBCPPCONDKIND;
390
391
392	/**
393	* Conditional stack entry.
394	*/
395	typedef struct VBCPPCOND
396	{
397	/** The next conditional on the stack. */
398	struct VBCPPCOND *pUp;
399	/** The kind of conditional. This changes on encountering \#elif. */
400	VBCPPCONDKIND enmKind;
401	/** Evaluation result. */
402	VBCPPEVAL enmResult;
403	/** The evaluation result of the whole stack. */
404	VBCPPEVAL enmStackResult;
405
406	/** Whether we've seen the last else. */
407	bool fSeenElse;
408	/** Set if we have an else if which has already been decided. */
409	bool fElIfDecided;
410	/** The nesting level of this condition. */
411	uint16_t iLevel;
412	/** The nesting level of this condition wrt the ones we keep. */
413	uint16_t iKeepLevel;
414
415	/** The condition string. (Points within the stream buffer.) */
416	const char *pchCond;
417	/** The condition length. */
418	size_t cchCond;
419	} VBCPPCOND;
420	/** Pointer to a conditional stack entry. */
421	typedef VBCPPCOND *PVBCPPCOND;
422
423
424	/**
425	* Input buffer stack entry.
426	*/
427	typedef struct VBCPPINPUT
428	{
429	/** Pointer to the next input on the stack. */
430	struct VBCPPINPUT *pUp;
431	/** The input stream. */
432	SCMSTREAM StrmInput;
433	/** Pointer into szName to the part which was specified. */
434	const char *pszSpecified;
435	/** The input file name with include path. */
436	char szName[1];
437	} VBCPPINPUT;
438	/** Pointer to a input buffer stack entry */
439	typedef VBCPPINPUT *PVBCPPINPUT;
440
441
442	/**
443	* The action to take with \#include.
444	*/
445	typedef enum VBCPPINCLUDEACTION
446	{
447	kVBCppIncludeAction_Invalid = 0,
448	kVBCppIncludeAction_Include,
449	kVBCppIncludeAction_PassThru,
450	kVBCppIncludeAction_Drop,
451	kVBCppIncludeAction_End
452	} VBCPPINCLUDEACTION;
453
454
455	/**
456	* C Preprocessor instance data.
457	*/
458	typedef struct VBCPP
459	{
460	/** @name Options
461	* @{ */
462	/** The preprocessing mode. */
463	VBCPPMODE enmMode;
464	/** Whether to keep comments. */
465	bool fKeepComments;
466	/** Whether to respect source defines. */
467	bool fRespectSourceDefines;
468	/** Whether to let source defines overrides the ones on the command
469	* line. */
470	bool fAllowRedefiningCmdLineDefines;
471	/** Whether to pass thru defines. */
472	bool fPassThruDefines;
473	/** Whether to allow undecided conditionals. */
474	bool fUndecidedConditionals;
475	/** Whether to pass thru D pragmas. */
476	bool fPassThruPragmaD;
477	/** Whether to pass thru STD pragmas. */
478	bool fPassThruPragmaSTD;
479	/** Whether to pass thru other pragmas. */
480	bool fPassThruPragmaOther;
481	/** Whether to pass thru \#error directives or execute them. */
482	bool fPassThruError;
483	/** Whether to remove dropped lines from the output. */
484	bool fRemoveDroppedLines;
485	/** Whether to preforme line splicing.
486	* @todo implement line splicing */
487	bool fLineSplicing;
488	/** What to do about include files. */
489	VBCPPINCLUDEACTION enmIncludeAction;
490
491	/** The number of include directories. */
492	uint32_t cIncludes;
493	/** Array of directories to search for include files. */
494	char **papszIncludes;
495
496	/** The name of the input file. */
497	const char *pszInput;
498	/** The name of the output file. NULL if stdout. */
499	const char *pszOutput;
500	/** @} */
501
502	/** The define string space. */
503	RTSTRSPACE StrSpace;
504	/** The string space holding explicitly undefined macros for selective
505	* preprocessing runs. */
506	RTSTRSPACE UndefStrSpace;
507	/** Indicates whether a C-word might need expansion.
508	* The bitmap is indexed by C-word lead character. Bits that are set
509	* indicates that the lead character is used in a \#define that we know and
510	* should expand. */
511	VBCPP_BITMAP_TYPE bmDefined[VBCPP_BITMAP_SIZE];
512
513	/** The current depth of the conditional stack. */
514	uint32_t cCondStackDepth;
515	/** Conditional stack. */
516	PVBCPPCOND pCondStack;
517	/** The current condition evaluates to kVBCppEval_False, don't output. */
518	bool fIf0Mode;
519	/** Just dropped a line and should maybe drop the current line. */
520	bool fJustDroppedLine;
521
522	/** Whether the current line could be a preprocessor line.
523	* This is set when EOL is encountered and cleared again when a
524	* non-comment-or-space character is encountered. See vbcppPreprocess. */
525	bool fMaybePreprocessorLine;
526
527	/** The input stack depth */
528	uint32_t cInputStackDepth;
529	/** The input buffer stack. */
530	PVBCPPINPUT pInputStack;
531
532	/** The output stream. */
533	SCMSTREAM StrmOutput;
534
535	/** The status of the whole job, as far as we know. */
536	RTEXITCODE rcExit;
537	/** Whether StrmOutput is valid (for vbcppTerm). */
538	bool fStrmOutputValid;
539	} VBCPP;
540
541
542	/*********************************************************************************************************************************
543	* Internal Functions *
544	*********************************************************************************************************************************/
545	static VBCPPEXPRRET vbcppExprParseUnaryOrValue(PVBCPPEXPRPARSER pParser);
546	static PVBCPPMACRO vbcppMacroLookup(PVBCPP pThis, const char *pszDefine, size_t cchDefine);
547	static RTEXITCODE vbcppMacroExpandIt(PVBCPP pThis, PVBCPPMACROEXP pExp, size_t offMacro, PVBCPPMACRO pMacro, size_t offParameters);
548	static RTEXITCODE vbcppMacroExpandReScan(PVBCPP pThis, PVBCPPMACROEXP pExp, VBCPPMACRORESCANMODE enmMode,
549	size_t pcReplacements, size_t pcDefinedUnknown);
550	static void vbcppMacroExpandCleanup(PVBCPPMACROEXP pExp);
551
552
553
554	/*
555	*
556	*
557	* Message Handling.
558	* Message Handling.
559	* Message Handling.
560	* Message Handling.
561	* Message Handling.
562	*
563	*
564	*/
565
566
567	/**
568	* Displays an error message.
569	*
570	* @returns RTEXITCODE_FAILURE
571	* @param pThis The C preprocessor instance.
572	* @param pszMsg The message.
573	* @param va Message arguments.
574	*/
575	static RTEXITCODE vbcppErrorV(PVBCPP pThis, const char *pszMsg, va_list va)
576	{
577	NOREF(pThis);
578	if (pThis->pInputStack)
579	{
580	PSCMSTREAM pStrm = &pThis->pInputStack->StrmInput;
581
582	size_t const off = ScmStreamTell(pStrm);
583	size_t const iLine = ScmStreamTellLine(pStrm);
584	ScmStreamSeekByLine(pStrm, iLine);
585	size_t const offLine = ScmStreamTell(pStrm);
586
587	RTPrintf("%s:%d:%zd: error: %N.\n", pThis->pInputStack->szName, iLine + 1, off - offLine + 1, pszMsg, va);
588
589	size_t cchLine;
590	SCMEOL enmEof;
591	const char *pszLine = ScmStreamGetLineByNo(pStrm, iLine, &cchLine, &enmEof);
592	if (pszLine)
593	RTPrintf(" %.*s\n"
594	" %*s^\n",
595	cchLine, pszLine, off - offLine, "");
596
597	ScmStreamSeekAbsolute(pStrm, off);
598	}
599	else
600	RTMsgErrorV(pszMsg, va);
601	return pThis->rcExit = RTEXITCODE_FAILURE;
602	}
603
604
605	/**
606	* Displays an error message.
607	*
608	* @returns RTEXITCODE_FAILURE
609	* @param pThis The C preprocessor instance.
610	* @param pszMsg The message.
611	* @param ... Message arguments.
612	*/
613	static RTEXITCODE vbcppError(PVBCPP pThis, const char *pszMsg, ...)
614	{
615	va_list va;
616	va_start(va, pszMsg);
617	RTEXITCODE rcExit = vbcppErrorV(pThis, pszMsg, va);
618	va_end(va);
619	return rcExit;
620	}
621
622
623	/**
624	* Displays an error message.
625	*
626	* @returns RTEXITCODE_FAILURE
627	* @param pThis The C preprocessor instance.
628	* @param pszPos Pointer to the offending character.
629	* @param pszMsg The message.
630	* @param ... Message arguments.
631	*/
632	static RTEXITCODE vbcppErrorPos(PVBCPP pThis, const char pszPos, const char pszMsg, ...)
633	{
634	NOREF(pszPos); NOREF(pThis);
635	va_list va;
636	va_start(va, pszMsg);
637	//RTMsgErrorV(pszMsg, va);
638	RTEXITCODE rcExit = vbcppErrorV(pThis, pszMsg, va);
639	va_end(va);
640	return rcExit;
641	}
642
643
644
645
646
647
648
649	/*
650	*
651	*
652	* Variable String Buffers.
653	* Variable String Buffers.
654	* Variable String Buffers.
655	* Variable String Buffers.
656	* Variable String Buffers.
657	*
658	*
659	*/
660
661
662	/**
663	* Initializes a string buffer.
664	*
665	* @param pStrBuf The buffer structure to initialize.
666	* @param pThis The C preprocessor instance.
667	*/
668	static void vbcppStrBufInit(PVBCPPSTRBUF pStrBuf, PVBCPP pThis)
669	{
670	pStrBuf->pThis = pThis;
671	pStrBuf->cchBuf = 0;
672	pStrBuf->cbBufAllocated = 0;
673	pStrBuf->pszBuf = NULL;
674	}
675
676
677	/**
678	* Deletes a string buffer.
679	*
680	* @param pStrBuf Pointer to the string buffer.
681	*/
682	static void vbcppStrBufDelete(PVBCPPSTRBUF pStrBuf)
683	{
684	RTMemFree(pStrBuf->pszBuf);
685	pStrBuf->pszBuf = NULL;
686	}
687
688
689	/**
690	* Ensures that sufficient bufferspace is available, growing the buffer if
691	* necessary.
692	*
693	* @returns RTEXITCODE_SUCCESS or RTEXITCODE_FAILURE+msg.
694	* @param pStrBuf Pointer to the string buffer.
695	* @param cbMin The minimum buffer size.
696	*/
697	static RTEXITCODE vbcppStrBufGrow(PVBCPPSTRBUF pStrBuf, size_t cbMin)
698	{
699	if (pStrBuf->cbBufAllocated >= cbMin)
700	return RTEXITCODE_SUCCESS;
701
702	size_t cbNew = pStrBuf->cbBufAllocated * 2;
703	if (cbNew < cbMin)
704	cbNew = RT_ALIGN_Z(cbMin, _1K);
705	void *pv = RTMemRealloc(pStrBuf->pszBuf, cbNew);
706	if (!pv)
707	return vbcppError(pStrBuf->pThis, "out of memory (%zu bytes)", cbNew);
708
709	pStrBuf->pszBuf = (char *)pv;
710	pStrBuf->cbBufAllocated = cbNew;
711	return RTEXITCODE_SUCCESS;
712	}
713
714
715	/**
716	* Appends a substring.
717	*
718	* @returns RTEXITCODE_SUCCESS or RTEXITCODE_FAILURE+msg.
719	* @param pStrBuf Pointer to the string buffer.
720	* @param pchSrc Pointer to the first character in the substring.
721	* @param cchSrc The length of the substring.
722	*/
723	static RTEXITCODE vbcppStrBufAppendN(PVBCPPSTRBUF pStrBuf, const char *pchSrc, size_t cchSrc)
724	{
725	size_t cchBuf = pStrBuf->cchBuf;
726	if (cchBuf + cchSrc + 1 > pStrBuf->cbBufAllocated)
727	{
728	RTEXITCODE rcExit = vbcppStrBufGrow(pStrBuf, cchBuf + cchSrc + 1);
729	if (rcExit != RTEXITCODE_SUCCESS)
730	return rcExit;
731	}
732
733	memcpy(&pStrBuf->pszBuf[cchBuf], pchSrc, cchSrc);
734	cchBuf += cchSrc;
735	pStrBuf->pszBuf[cchBuf] = '\0';
736	pStrBuf->cchBuf = cchBuf;
737
738	return RTEXITCODE_SUCCESS;
739	}
740
741
742	/**
743	* Appends a character.
744	*
745	* @returns RTEXITCODE_SUCCESS or RTEXITCODE_FAILURE+msg.
746	* @param pStrBuf Pointer to the string buffer.
747	* @param ch The charater to append.
748	*/
749	static RTEXITCODE vbcppStrBufAppendCh(PVBCPPSTRBUF pStrBuf, char ch)
750	{
751	size_t cchBuf = pStrBuf->cchBuf;
752	if (cchBuf + 2 > pStrBuf->cbBufAllocated)
753	{
754	RTEXITCODE rcExit = vbcppStrBufGrow(pStrBuf, cchBuf + 2);
755	if (rcExit != RTEXITCODE_SUCCESS)
756	return rcExit;
757	}
758
759	pStrBuf->pszBuf[cchBuf++] = ch;
760	pStrBuf->pszBuf[cchBuf] = '\0';
761	pStrBuf->cchBuf = cchBuf;
762
763	return RTEXITCODE_SUCCESS;
764	}
765
766
767	/**
768	* Appends a string to the buffer.
769	*
770	* @returns RTEXITCODE_SUCCESS or RTEXITCODE_FAILURE+msg.
771	* @param pStrBuf Pointer to the string buffer.
772	* @param psz The string to append.
773	*/
774	static RTEXITCODE vbcppStrBufAppend(PVBCPPSTRBUF pStrBuf, const char *psz)
775	{
776	return vbcppStrBufAppendN(pStrBuf, psz, strlen(psz));
777	}
778
779
780	/**
781	* Gets the last char in the buffer.
782	*
783	* @returns Last character, 0 if empty.
784	* @param pStrBuf Pointer to the string buffer.
785	*/
786	static char vbcppStrBufLastCh(PVBCPPSTRBUF pStrBuf)
787	{
788	if (!pStrBuf->cchBuf)
789	return '\0';
790	return pStrBuf->pszBuf[pStrBuf->cchBuf - 1];
791	}
792
793
794
795
796
797
798
799	/*
800	*
801	*
802	* C Identifier/Word Parsing.
803	* C Identifier/Word Parsing.
804	* C Identifier/Word Parsing.
805	* C Identifier/Word Parsing.
806	* C Identifier/Word Parsing.
807	*
808	*
809	*/
810
811
812	/**
813	* Checks if the given character is a valid C identifier lead character.
814	*
815	* @returns true / false.
816	* @param ch The character to inspect.
817	*/
818	DECLINLINE(bool) vbcppIsCIdentifierLeadChar(char ch)
819	{
820	return RT_C_IS_ALPHA(ch)
821	\|\| ch == '_';
822	}
823
824
825	/**
826	* Checks if the given character is a valid C identifier character.
827	*
828	* @returns true / false.
829	* @param ch The character to inspect.
830	*/
831	DECLINLINE(bool) vbcppIsCIdentifierChar(char ch)
832	{
833	return RT_C_IS_ALNUM(ch)
834	\|\| ch == '_';
835	}
836
837
838
839	/**
840	*
841	* @returns @c true if valid, @c false if not. Error message already displayed
842	* on failure.
843	* @param pThis The C preprocessor instance.
844	* @param pchIdentifier The start of the identifier to validate.
845	* @param cchIdentifier The length of the identifier. RTSTR_MAX if not
846	* known.
847	*/
848	static bool vbcppValidateCIdentifier(PVBCPP pThis, const char *pchIdentifier, size_t cchIdentifier)
849	{
850	if (cchIdentifier == RTSTR_MAX)
851	cchIdentifier = strlen(pchIdentifier);
852
853	if (cchIdentifier == 0)
854	{
855	vbcppErrorPos(pThis, pchIdentifier, "Zero length identifier");
856	return false;
857	}
858
859	if (!vbcppIsCIdentifierLeadChar(*pchIdentifier))
860	{
861	vbcppErrorPos(pThis, pchIdentifier, "Bad lead chararacter in identifier: '%.*s'", cchIdentifier, pchIdentifier);
862	return false;
863	}
864
865	for (size_t off = 1; off < cchIdentifier; off++)
866	{
867	if (!vbcppIsCIdentifierChar(pchIdentifier[off]))
868	{
869	vbcppErrorPos(pThis, pchIdentifier + off, "Illegal chararacter in identifier: '%.*s' (#%zu)", cchIdentifier, pchIdentifier, off + 1);
870	return false;
871	}
872	}
873
874	return true;
875	}
876
877	#if 0
878
879	/**
880	* Checks if the given character is valid C punctuation.
881	*
882	* @returns true / false.
883	* @param ch The character to inspect.
884	*/
885	DECLINLINE(bool) vbcppIsCPunctuationLeadChar(char ch)
886	{
887	switch (ch)
888	{
889	case '!':
890	case '#':
891	case '%':
892	case '&':
893	case '(':
894	case ')':
895	case '*':
896	case '+':
897	case ',':
898	case '-':
899	case '.':
900	case '/':
901	case ':':
902	case ';':
903	case '<':
904	case '=':
905	case '>':
906	case '?':
907	case '[':
908	case ']':
909	case '^':
910	case '{':
911	case '\|':
912	case '}':
913	case '~':
914	return true;
915	default:
916	return false;
917	}
918	}
919
920
921	/**
922	* Checks if the given string start with valid C punctuation.
923	*
924	* @returns 0 if not, otherwise the length of the punctuation.
925	* @param pch The which start we should evaluate.
926	* @param cchMax The maximum string length.
927	*/
928	static size_t vbcppIsCPunctuationLeadChar(const char *psz, size_t cchMax)
929	{
930	if (!cchMax)
931	return 0;
932
933	switch (psz[0])
934	{
935	case '!':
936	case '*':
937	case '/':
938	case '=':
939	case '^':
940	if (cchMax >= 2 && psz[1] == '=')
941	return 2;
942	return 1;
943
944	case '#':
945	if (cchMax >= 2 && psz[1] == '#')
946	return 2;
947	return 1;
948
949	case '%':
950	if (cchMax >= 2 && (psz[1] == '=' \|\| psz[1] == '>'))
951	return 2;
952	if (cchMax >= 2 && psz[1] == ':')
953	{
954	if (cchMax >= 4 && psz[2] == '%' && psz[3] == ':')
955	return 4;
956	return 2;
957	}
958	return 1;
959
960	case '&':
961	if (cchMax >= 2 && (psz[1] == '=' \|\| psz[1] == '&'))
962	return 2;
963	return 1;
964
965	case '(':
966	case ')':
967	case ',':
968	case '?':
969	case '[':
970	case ']':
971	case '{':
972	case '}':
973	return 1;
974
975	case '+':
976	if (cchMax >= 2 && (psz[1] == '=' \|\| psz[1] == '+'))
977	return 2;
978	return 1;
979
980	case '-':
981	if (cchMax >= 2 && (psz[1] == '=' \|\| psz[1] == '-' \|\| psz[1] == '>'))
982	return 2;
983	return 1;
984
985	case ':':
986	if (cchMax >= 2 && psz[1] == '>')
987	return 2;
988	return 1;
989
990	case ';':
991	return 1;
992
993	case '<':
994	if (cchMax >= 2 && psz[1] == '<')
995	{
996	if (cchMax >= 3 && psz[2] == '=')
997	return 3;
998	return 2;
999	}
1000	if (cchMax >= 2 && (psz[1] == '=' \|\| psz[1] == ':' \|\| psz[1] == '%'))
1001	return 2;
1002	return 1;
1003
1004	case '.':
1005	if (cchMax >= 3 && psz[1] == '.' && psz[2] == '.')
1006	return 3;
1007	return 1;
1008
1009	case '>':
1010	if (cchMax >= 2 && psz[1] == '>')
1011	{
1012	if (cchMax >= 3 && psz[2] == '=')
1013	return 3;
1014	return 2;
1015	}
1016	if (cchMax >= 2 && psz[1] == '=')
1017	return 2;
1018	return 1;
1019
1020	case '\|':
1021	if (cchMax >= 2 && (psz[1] == '=' \|\| psz[1] == '\|'))
1022	return 2;
1023	return 1;
1024
1025	case '~':
1026	return 1;
1027
1028	default:
1029	return 0;
1030	}
1031	}
1032
1033	#endif
1034
1035
1036
1037
1038
1039	/*
1040	*
1041	*
1042	* Output
1043	* Output
1044	* Output
1045	* Output
1046	* Output
1047	*
1048	*
1049	*/
1050
1051
1052	/**
1053	* Outputs a character.
1054	*
1055	* @returns RTEXITCODE_SUCCESS or RTEXITCODE_FAILURE+msg.
1056	* @param pThis The C preprocessor instance.
1057	* @param ch The character to output.
1058	*/
1059	static RTEXITCODE vbcppOutputCh(PVBCPP pThis, char ch)
1060	{
1061	int rc = ScmStreamPutCh(&pThis->StrmOutput, ch);
1062	if (RT_SUCCESS(rc))
1063	return RTEXITCODE_SUCCESS;
1064	return vbcppError(pThis, "Output error: %Rrc", rc);
1065	}
1066
1067
1068	/**
1069	* Outputs a string.
1070	*
1071	* @returns RTEXITCODE_SUCCESS or RTEXITCODE_FAILURE+msg.
1072	* @param pThis The C preprocessor instance.
1073	* @param pch The string.
1074	* @param cch The number of characters to write.
1075	*/
1076	static RTEXITCODE vbcppOutputWrite(PVBCPP pThis, const char *pch, size_t cch)
1077	{
1078	int rc = ScmStreamWrite(&pThis->StrmOutput, pch, cch);
1079	if (RT_SUCCESS(rc))
1080	return RTEXITCODE_SUCCESS;
1081	return vbcppError(pThis, "Output error: %Rrc", rc);
1082	}
1083
1084
1085	static RTEXITCODE vbcppOutputComment(PVBCPP pThis, PSCMSTREAM pStrmInput, size_t offStart, size_t cchOutputted,
1086	size_t cchMinIndent)
1087	{
1088	RT_NOREF_PV(cchMinIndent); /** @todo cchMinIndent */
1089
1090	size_t offCur = ScmStreamTell(pStrmInput);
1091	if (offStart < offCur)
1092	{
1093	int rc = ScmStreamSeekAbsolute(pStrmInput, offStart);
1094	AssertRCReturn(rc, vbcppError(pThis, "Input seek error: %Rrc", rc));
1095
1096	/*
1097	* Use the same indent, if possible.
1098	*/
1099	size_t cchIndent = offStart - ScmStreamTellOffsetOfLine(pStrmInput, ScmStreamTellLine(pStrmInput));
1100	if (cchOutputted < cchIndent)
1101	rc = ScmStreamPrintf(&pThis->StrmOutput, "%*s", cchIndent - cchOutputted, "");
1102	else
1103	rc = ScmStreamPutCh(&pThis->StrmOutput, ' ');
1104	if (RT_FAILURE(rc))
1105	return vbcppError(pThis, "Output error: %Rrc", rc);
1106
1107	/*
1108	* Copy the bytes.
1109	*/
1110	while (ScmStreamTell(pStrmInput) < offCur)
1111	{
1112	unsigned ch = ScmStreamGetCh(pStrmInput);
1113	if (ch == ~(unsigned)0)
1114	return vbcppError(pThis, "Input error: %Rrc", rc);
1115	rc = ScmStreamPutCh(&pThis->StrmOutput, ch);
1116	if (RT_FAILURE(rc))
1117	return vbcppError(pThis, "Output error: %Rrc", rc);
1118	}
1119	}
1120
1121	return RTEXITCODE_SUCCESS;
1122	}
1123
1124
1125
1126
1127
1128	/*
1129	*
1130	*
1131	* Input
1132	* Input
1133	* Input
1134	* Input
1135	* Input
1136	*
1137	*
1138	*/
1139
1140
1141	#if 0 /* unused */
1142	/**
1143	* Skips white spaces, including escaped new-lines.
1144	*
1145	* @param pStrmInput The input stream.
1146	*/
1147	static void vbcppProcessSkipWhiteAndEscapedEol(PSCMSTREAM pStrmInput)
1148	{
1149	unsigned chPrev = ~(unsigned)0;
1150	unsigned ch;
1151	while ((ch = ScmStreamPeekCh(pStrmInput)) != ~(unsigned)0)
1152	{
1153	if (ch == '\r' \|\| ch == '\n')
1154	{
1155	if (chPrev != '\\')
1156	break;
1157	chPrev = ch;
1158	ScmStreamSeekByLine(pStrmInput, ScmStreamTellLine(pStrmInput) + 1);
1159	}
1160	else if (RT_C_IS_SPACE(ch))
1161	{
1162	chPrev = ch;
1163	ch = ScmStreamGetCh(pStrmInput);
1164	Assert(ch == chPrev);
1165	}
1166	else
1167	break;
1168	}
1169	}
1170	#endif
1171
1172
1173	/**
1174	* Skips white spaces, escaped new-lines and multi line comments.
1175	*
1176	* @param pThis The C preprocessor instance.
1177	* @param pStrmInput The input stream.
1178	*/
1179	static RTEXITCODE vbcppProcessSkipWhiteEscapedEolAndComments(PVBCPP pThis, PSCMSTREAM pStrmInput)
1180	{
1181	unsigned chPrev = ~(unsigned)0;
1182	unsigned ch;
1183	while ((ch = ScmStreamPeekCh(pStrmInput)) != ~(unsigned)0)
1184	{
1185	if (!RT_C_IS_SPACE(ch))
1186	{
1187	/* Multi-line Comment? */
1188	if (ch != '/')
1189	break; /* most definitely, not. */
1190
1191	size_t offSaved = ScmStreamTell(pStrmInput);
1192	ScmStreamGetCh(pStrmInput);
1193	if (ScmStreamPeekCh(pStrmInput) != '*')
1194	{
1195	ScmStreamSeekAbsolute(pStrmInput, offSaved);
1196	break; /* no */
1197	}
1198
1199	/* Skip to the end of the comment. */
1200	while ((ch = ScmStreamGetCh(pStrmInput)) != ~(unsigned)0)
1201	{
1202	if (ch == '*')
1203	{
1204	ch = ScmStreamGetCh(pStrmInput);
1205	if (ch == '/')
1206	break;
1207	if (ch == ~(unsigned)0)
1208	break;
1209	}
1210	}
1211	if (ch == ~(unsigned)0)
1212	return vbcppError(pThis, "unterminated multi-line comment");
1213	chPrev = '/';
1214	}
1215	/* New line (also matched by RT_C_IS_SPACE). */
1216	else if (ch == '\r' \|\| ch == '\n')
1217	{
1218	/* Stop if not escaped. */
1219	if (chPrev != '\\')
1220	break;
1221	chPrev = ch;
1222	ScmStreamSeekByLine(pStrmInput, ScmStreamTellLine(pStrmInput) + 1);
1223	}
1224	/* Real space char. */
1225	else
1226	{
1227	chPrev = ch;
1228	ch = ScmStreamGetCh(pStrmInput);
1229	Assert(ch == chPrev);
1230	}
1231	}
1232	return RTEXITCODE_SUCCESS;
1233	}
1234
1235
1236	/**
1237	* Skips white spaces, escaped new-lines, and multi line comments, then checking
1238	* that we're at the end of a line.
1239	*
1240	* @param pThis The C preprocessor instance.
1241	* @param pStrmInput The input stream.
1242	*/
1243	static RTEXITCODE vbcppProcessSkipWhiteEscapedEolAndCommentsCheckEol(PVBCPP pThis, PSCMSTREAM pStrmInput)
1244	{
1245	RTEXITCODE rcExit = vbcppProcessSkipWhiteEscapedEolAndComments(pThis, pStrmInput);
1246	if (rcExit == RTEXITCODE_SUCCESS)
1247	{
1248	unsigned ch = ScmStreamPeekCh(pStrmInput);
1249	if ( ch != ~(unsigned)0
1250	&& ch != '\r'
1251	&& ch != '\n')
1252	rcExit = vbcppError(pThis, "Did not expected anything more on this line");
1253	}
1254	return rcExit;
1255	}
1256
1257
1258	/**
1259	* Skips white spaces.
1260	*
1261	* @returns The current location upon return.
1262	* @param pStrmInput The input stream.
1263	*/
1264	static size_t vbcppProcessSkipWhite(PSCMSTREAM pStrmInput)
1265	{
1266	unsigned ch;
1267	while ((ch = ScmStreamPeekCh(pStrmInput)) != ~(unsigned)0)
1268	{
1269	if (!RT_C_IS_SPACE(ch) \|\| ch == '\r' \|\| ch == '\n')
1270	break;
1271	unsigned chCheck = ScmStreamGetCh(pStrmInput);
1272	AssertBreak(chCheck == ch);
1273	}
1274	return ScmStreamTell(pStrmInput);
1275	}
1276
1277
1278	/**
1279	* Looks for a left parenthesis in the input stream.
1280	*
1281	* Used during macro expansion. Will ignore comments, newlines and other
1282	* whitespace.
1283	*
1284	* @retval true if found. The stream position at opening parenthesis.
1285	* @retval false if not found. The stream position is unchanged.
1286	*
1287	* @param pThis The C preprocessor instance.
1288	* @param pStrmInput The input stream.
1289	*/
1290	static bool vbcppInputLookForLeftParenthesis(PVBCPP pThis, PSCMSTREAM pStrmInput)
1291	{
1292	size_t offSaved = ScmStreamTell(pStrmInput);
1293	/RTEXITCODE rcExit =/ vbcppProcessSkipWhiteEscapedEolAndComments(pThis, pStrmInput);
1294	unsigned ch = ScmStreamPeekCh(pStrmInput);
1295	if (ch == '(')
1296	return true;
1297
1298	int rc = ScmStreamSeekAbsolute(pStrmInput, offSaved);
1299	AssertFatalRC(rc);
1300	return false;
1301	}
1302
1303
1304	/**
1305	* Skips input until the real end of the current directive line has been
1306	* reached.
1307	*
1308	* This includes multiline comments starting on the same line
1309	*
1310	* @returns RTEXITCODE_SUCCESS or RTEXITCODE_FAILURE+msg.
1311	* @param pThis The C preprocessor instance.
1312	* @param pStrmInput The input stream.
1313	* @param poffComment Where to note down the position of the final
1314	* comment. Optional.
1315	*/
1316	static RTEXITCODE vbcppInputSkipToEndOfDirectiveLine(PVBCPP pThis, PSCMSTREAM pStrmInput, size_t *poffComment)
1317	{
1318	if (poffComment)
1319	*poffComment = ~(size_t)0;
1320
1321	RTEXITCODE rcExit = RTEXITCODE_SUCCESS;
1322	bool fInComment = false;
1323	unsigned chPrev = 0;
1324	unsigned ch;
1325	while ((ch = ScmStreamPeekCh(pStrmInput)) != ~(unsigned)0)
1326	{
1327	if (ch == '\r' \|\| ch == '\n')
1328	{
1329	if (chPrev == '\\')
1330	{
1331	ScmStreamSeekByLine(pStrmInput, ScmStreamTellLine(pStrmInput) + 1);
1332	continue;
1333	}
1334	if (!fInComment)
1335	break;
1336	/* The expression continues after multi-line comments. Cool. :-) */
1337	}
1338	else if (!fInComment)
1339	{
1340	if (chPrev == '/' && ch == '*' )
1341	{
1342	fInComment = true;
1343	if (poffComment)
1344	*poffComment = ScmStreamTell(pStrmInput) - 1;
1345	}
1346	else if (chPrev == '/' && ch == '/')
1347	{
1348	if (poffComment)
1349	*poffComment = ScmStreamTell(pStrmInput) - 1;
1350	rcExit = vbcppProcessSkipWhiteEscapedEolAndComments(pThis, pStrmInput);
1351	break; /* done */
1352	}
1353	}
1354	else if (ch == '/' && chPrev == '*')
1355	fInComment = false;
1356
1357	/* advance */
1358	chPrev = ch;
1359	ch = ScmStreamGetCh(pStrmInput); Assert(ch == chPrev);
1360	}
1361	return rcExit;
1362	}
1363
1364
1365	/**
1366	* Processes a multi-line comment.
1367	*
1368	* Must either string the comment or keep it. If the latter, we must refrain
1369	* from replacing C-words in it.
1370	*
1371	* @returns RTEXITCODE_SUCCESS or RTEXITCODE_FAILURE+msg.
1372	* @param pThis The C preprocessor instance.
1373	* @param pStrmInput The input stream.
1374	*/
1375	static RTEXITCODE vbcppProcessMultiLineComment(PVBCPP pThis, PSCMSTREAM pStrmInput)
1376	{
1377	/* The open comment sequence. */
1378	ScmStreamGetCh(pStrmInput); /* '' /
1379	RTEXITCODE rcExit = RTEXITCODE_SUCCESS;
1380	if ( pThis->fKeepComments
1381	&& !pThis->fIf0Mode)
1382	rcExit = vbcppOutputWrite(pThis, "/*", 2);
1383
1384	/* The comment.*/
1385	unsigned ch;
1386	while ( rcExit == RTEXITCODE_SUCCESS
1387	&& (ch = ScmStreamGetCh(pStrmInput)) != ~(unsigned)0 )
1388	{
1389	if (ch == '*')
1390	{
1391	/* Closing sequence? */
1392	unsigned ch2 = ScmStreamPeekCh(pStrmInput);
1393	if (ch2 == '/')
1394	{
1395	ScmStreamGetCh(pStrmInput);
1396	if ( pThis->fKeepComments
1397	&& !pThis->fIf0Mode)
1398	rcExit = vbcppOutputWrite(pThis, "*/", 2);
1399	break;
1400	}
1401	}
1402
1403	if (ch == '\r' \|\| ch == '\n')
1404	{
1405	if ( ( pThis->fKeepComments
1406	&& !pThis->fIf0Mode)
1407	\|\| !pThis->fRemoveDroppedLines
1408	\|\| !ScmStreamIsAtStartOfLine(&pThis->StrmOutput))
1409	rcExit = vbcppOutputCh(pThis, ch);
1410	pThis->fJustDroppedLine = false;
1411	pThis->fMaybePreprocessorLine = true;
1412	}
1413	else if ( pThis->fKeepComments
1414	&& !pThis->fIf0Mode)
1415	rcExit = vbcppOutputCh(pThis, ch);
1416
1417	if (rcExit != RTEXITCODE_SUCCESS)
1418	break;
1419	}
1420	return rcExit;
1421	}
1422
1423
1424	/**
1425	* Processes a single line comment.
1426	*
1427	* Must either string the comment or keep it. If the latter, we must refrain
1428	* from replacing C-words in it.
1429	*
1430	* @returns RTEXITCODE_SUCCESS or RTEXITCODE_FAILURE+msg.
1431	* @param pThis The C preprocessor instance.
1432	* @param pStrmInput The input stream.
1433	*/
1434	static RTEXITCODE vbcppProcessOneLineComment(PVBCPP pThis, PSCMSTREAM pStrmInput)
1435	{
1436	RTEXITCODE rcExit = RTEXITCODE_SUCCESS;
1437	SCMEOL enmEol;
1438	size_t cchLine;
1439	const char *pszLine = ScmStreamGetLine(pStrmInput, &cchLine, &enmEol); Assert(pszLine);
1440	pszLine--; cchLine++; /* unfetching the first slash. */
1441	for (;;)
1442	{
1443	if ( pThis->fKeepComments
1444	&& !pThis->fIf0Mode)
1445	rcExit = vbcppOutputWrite(pThis, pszLine, cchLine + enmEol);
1446	else if ( !pThis->fIf0Mode
1447	\|\| !pThis->fRemoveDroppedLines
1448	\|\| !ScmStreamIsAtStartOfLine(&pThis->StrmOutput) )
1449	rcExit = vbcppOutputWrite(pThis, pszLine + cchLine, enmEol);
1450	if (rcExit != RTEXITCODE_SUCCESS)
1451	break;
1452	if ( cchLine == 0
1453	\|\| pszLine[cchLine - 1] != '\\')
1454	break;
1455
1456	pszLine = ScmStreamGetLine(pStrmInput, &cchLine, &enmEol);
1457	if (!pszLine)
1458	break;
1459	}
1460	pThis->fJustDroppedLine = false;
1461	pThis->fMaybePreprocessorLine = true;
1462	return rcExit;
1463	}
1464
1465
1466	/**
1467	* Processes a double quoted string.
1468	*
1469	* Must not replace any C-words in strings.
1470	*
1471	* @returns RTEXITCODE_SUCCESS or RTEXITCODE_FAILURE+msg.
1472	* @param pThis The C preprocessor instance.
1473	* @param pStrmInput The input stream.
1474	*/
1475	static RTEXITCODE vbcppProcessStringLitteral(PVBCPP pThis, PSCMSTREAM pStrmInput)
1476	{
1477	RTEXITCODE rcExit = vbcppOutputCh(pThis, '"');
1478	if (rcExit == RTEXITCODE_SUCCESS)
1479	{
1480	bool fEscaped = false;
1481	for (;;)
1482	{
1483	unsigned ch = ScmStreamGetCh(pStrmInput);
1484	if (ch == ~(unsigned)0)
1485	{
1486	rcExit = vbcppError(pThis, "Unterminated double quoted string");
1487	break;
1488	}
1489
1490	rcExit = vbcppOutputCh(pThis, ch);
1491	if (rcExit != RTEXITCODE_SUCCESS)
1492	break;
1493
1494	if (ch == '"' && !fEscaped)
1495	break;
1496	fEscaped = !fEscaped && ch == '\\';
1497	}
1498	}
1499	return rcExit;
1500	}
1501
1502
1503	/**
1504	* Processes a single quoted constant.
1505	*
1506	* Must not replace any C-words in character constants.
1507	*
1508	* @returns RTEXITCODE_SUCCESS or RTEXITCODE_FAILURE+msg.
1509	* @param pThis The C preprocessor instance.
1510	* @param pStrmInput The input stream.
1511	*/
1512	static RTEXITCODE vbcppProcessCharacterConstant(PVBCPP pThis, PSCMSTREAM pStrmInput)
1513	{
1514	RTEXITCODE rcExit = vbcppOutputCh(pThis, '\'');
1515	if (rcExit == RTEXITCODE_SUCCESS)
1516	{
1517	bool fEscaped = false;
1518	for (;;)
1519	{
1520	unsigned ch = ScmStreamGetCh(pStrmInput);
1521	if (ch == ~(unsigned)0)
1522	{
1523	rcExit = vbcppError(pThis, "Unterminated singled quoted string");
1524	break;
1525	}
1526
1527	rcExit = vbcppOutputCh(pThis, ch);
1528	if (rcExit != RTEXITCODE_SUCCESS)
1529	break;
1530
1531	if (ch == '\'' && !fEscaped)
1532	break;
1533	fEscaped = !fEscaped && ch == '\\';
1534	}
1535	}
1536	return rcExit;
1537	}
1538
1539
1540	/**
1541	* Processes a integer or floating point number constant.
1542	*
1543	* Must not replace the type suffix.
1544	*
1545	* @returns RTEXITCODE_SUCCESS or RTEXITCODE_FAILURE+msg.
1546	* @param pThis The C preprocessor instance.
1547	* @param pStrmInput The input stream.
1548	* @param chFirst The first character.
1549	*/
1550	static RTEXITCODE vbcppProcessNumber(PVBCPP pThis, PSCMSTREAM pStrmInput, char chFirst)
1551	{
1552	RTEXITCODE rcExit = vbcppOutputCh(pThis, chFirst);
1553
1554	unsigned ch;
1555	while ( rcExit == RTEXITCODE_SUCCESS
1556	&& (ch = ScmStreamPeekCh(pStrmInput)) != ~(unsigned)0)
1557	{
1558	if ( !vbcppIsCIdentifierChar(ch)
1559	&& ch != '.')
1560	break;
1561
1562	unsigned ch2 = ScmStreamGetCh(pStrmInput);
1563	AssertBreakStmt(ch2 == ch, rcExit = vbcppError(pThis, "internal error"));
1564	rcExit = vbcppOutputCh(pThis, ch);
1565	}
1566
1567	return rcExit;
1568	}
1569
1570
1571	/**
1572	* Processes a identifier, possibly replacing it with a definition.
1573	*
1574	* @returns RTEXITCODE_SUCCESS or RTEXITCODE_FAILURE+msg.
1575	* @param pThis The C preprocessor instance.
1576	* @param pStrmInput The input stream.
1577	*/
1578	static RTEXITCODE vbcppProcessIdentifier(PVBCPP pThis, PSCMSTREAM pStrmInput)
1579	{
1580	RTEXITCODE rcExit;
1581	size_t cchDefine;
1582	const char *pchDefine = ScmStreamCGetWordM1(pStrmInput, &cchDefine);
1583	AssertReturn(pchDefine, vbcppError(pThis, "Internal error in ScmStreamCGetWordM1"));
1584
1585	/*
1586	* Does this look like a define we know?
1587	*/
1588	PVBCPPMACRO pMacro = vbcppMacroLookup(pThis, pchDefine, cchDefine);
1589	if ( pMacro
1590	&& ( !pMacro->fFunction
1591	\|\| vbcppInputLookForLeftParenthesis(pThis, pStrmInput)) )
1592	{
1593	/*
1594	* Expand it.
1595	*/
1596	VBCPPMACROEXP ExpCtx;
1597	#if 0
1598	ExpCtx.pMacroStack = NULL;
1599	#endif
1600	ExpCtx.pStrmInput = pStrmInput;
1601	ExpCtx.papszArgs = NULL;
1602	ExpCtx.cArgs = 0;
1603	ExpCtx.cArgsAlloced = 0;
1604	vbcppStrBufInit(&ExpCtx.StrBuf, pThis);
1605	rcExit = vbcppStrBufAppendN(&ExpCtx.StrBuf, pchDefine, cchDefine);
1606	if (rcExit == RTEXITCODE_SUCCESS)
1607	rcExit = vbcppMacroExpandIt(pThis, &ExpCtx, 0 /* offset */, pMacro, cchDefine);
1608	if (rcExit == RTEXITCODE_SUCCESS)
1609	rcExit = vbcppMacroExpandReScan(pThis, &ExpCtx, kMacroReScanMode_Normal, NULL, NULL);
1610	if (rcExit == RTEXITCODE_SUCCESS)
1611	{
1612	/*
1613	* Insert it into the output stream. Make sure there is a
1614	* whitespace following it.
1615	*/
1616	int rc = ScmStreamWrite(&pThis->StrmOutput, ExpCtx.StrBuf.pszBuf, ExpCtx.StrBuf.cchBuf);
1617	if (RT_SUCCESS(rc))
1618	{
1619	unsigned chAfter = ScmStreamPeekCh(pStrmInput);
1620	if (chAfter != ~(unsigned)0 && !RT_C_IS_SPACE(chAfter))
1621	rcExit = vbcppOutputCh(pThis, ' ');
1622	}
1623	else
1624	rcExit = vbcppError(pThis, "Output error: %Rrc", rc);
1625	}
1626	vbcppMacroExpandCleanup(&ExpCtx);
1627	}
1628	else
1629	{
1630	/*
1631	* Not a macro or a function-macro name match but no invocation, just
1632	* output the text unchanged.
1633	*/
1634	int rc = ScmStreamWrite(&pThis->StrmOutput, pchDefine, cchDefine);
1635	if (RT_SUCCESS(rc))
1636	rcExit = RTEXITCODE_SUCCESS;
1637	else
1638	rcExit = vbcppError(pThis, "Output error: %Rrc", rc);
1639	}
1640	return rcExit;
1641	}
1642
1643
1644
1645
1646
1647
1648
1649	/*
1650	*
1651	*
1652	* D E F I N E S / M A C R O S
1653	* D E F I N E S / M A C R O S
1654	* D E F I N E S / M A C R O S
1655	* D E F I N E S / M A C R O S
1656	* D E F I N E S / M A C R O S
1657	*
1658	*
1659	*/
1660
1661
1662	/**
1663	* Checks if a define exists.
1664	*
1665	* @returns true or false.
1666	* @param pThis The C preprocessor instance.
1667	* @param pszDefine The define name and optionally the argument
1668	* list.
1669	* @param cchDefine The length of the name. RTSTR_MAX is ok.
1670	*/
1671	static bool vbcppMacroExists(PVBCPP pThis, const char *pszDefine, size_t cchDefine)
1672	{
1673	return cchDefine > 0
1674	&& VBCPP_BITMAP_IS_SET(pThis->bmDefined, *pszDefine)
1675	&& RTStrSpaceGetN(&pThis->StrSpace, pszDefine, cchDefine) != NULL;
1676	}
1677
1678
1679	/**
1680	* Looks up a define.
1681	*
1682	* @returns Pointer to the define if found, NULL if not.
1683	* @param pThis The C preprocessor instance.
1684	* @param pszDefine The define name and optionally the argument
1685	* list.
1686	* @param cchDefine The length of the name. RTSTR_MAX is ok.
1687	*/
1688	static PVBCPPMACRO vbcppMacroLookup(PVBCPP pThis, const char *pszDefine, size_t cchDefine)
1689	{
1690	if (!cchDefine)
1691	return NULL;
1692	if (!VBCPP_BITMAP_IS_SET(pThis->bmDefined, *pszDefine))
1693	return NULL;
1694	return (PVBCPPMACRO)RTStrSpaceGetN(&pThis->StrSpace, pszDefine, cchDefine);
1695	}
1696
1697
1698	static uint32_t vbcppMacroLookupArg(PVBCPPMACRO pMacro, const char *pchName, size_t cchName)
1699	{
1700	Assert(cchName > 0);
1701
1702	char const ch = *pchName;
1703	for (uint32_t i = 0; i < pMacro->cArgs; i++)
1704	if ( pMacro->papszArgs[i][0] == ch
1705	&& !strncmp(pMacro->papszArgs[i], pchName, cchName)
1706	&& pMacro->papszArgs[i][cchName] == '\0')
1707	return i;
1708
1709	if ( pMacro->fVarArg
1710	&& cchName == sizeof("__VA_ARGS__") - 1
1711	&& !strncmp(pchName, "__VA_ARGS__", sizeof("__VA_ARGS__") - 1) )
1712	return pMacro->cArgs;
1713
1714	return UINT32_MAX;
1715	}
1716
1717
1718	static RTEXITCODE vbcppMacroExpandReplace(PVBCPP pThis, PVBCPPMACROEXP pExp, size_t off, size_t cchToReplace,
1719	const char *pchReplacement, size_t cchReplacement)
1720	{
1721	RT_NOREF_PV(pThis);
1722
1723	/*
1724	* Figure how much space we actually need.
1725	* (Hope this whitespace stuff is correct...)
1726	*/
1727	bool const fLeadingSpace = off > 0
1728	&& !RT_C_IS_SPACE(pExp->StrBuf.pszBuf[off - 1]);
1729	bool const fTrailingSpace = off + cchToReplace < pExp->StrBuf.cchBuf
1730	&& !RT_C_IS_SPACE(pExp->StrBuf.pszBuf[off + cchToReplace]);
1731	size_t const cchActualReplacement = fLeadingSpace + cchReplacement + fTrailingSpace;
1732
1733	/*
1734	* Adjust the buffer size and contents.
1735	*/
1736	if (cchActualReplacement > cchToReplace)
1737	{
1738	size_t const offMore = cchActualReplacement - cchToReplace;
1739
1740	/* Ensure enough buffer space. */
1741	size_t cbMinBuf = offMore + pExp->StrBuf.cchBuf + 1;
1742	RTEXITCODE rcExit = vbcppStrBufGrow(&pExp->StrBuf, cbMinBuf);
1743	if (rcExit != RTEXITCODE_SUCCESS)
1744	return rcExit;
1745
1746	/* Push the chars following the replacement area down to make room. */
1747	memmove(&pExp->StrBuf.pszBuf[off + cchToReplace + offMore],
1748	&pExp->StrBuf.pszBuf[off + cchToReplace],
1749	pExp->StrBuf.cchBuf - off - cchToReplace + 1);
1750	pExp->StrBuf.cchBuf += offMore;
1751
1752	}
1753	else if (cchActualReplacement < cchToReplace)
1754	{
1755	size_t const offLess = cchToReplace - cchActualReplacement;
1756
1757	/* Pull the chars following the replacement area up. */
1758	memmove(&pExp->StrBuf.pszBuf[off + cchToReplace - offLess],
1759	&pExp->StrBuf.pszBuf[off + cchToReplace],
1760	pExp->StrBuf.cchBuf - off - cchToReplace + 1);
1761	pExp->StrBuf.cchBuf -= offLess;
1762	}
1763
1764	/*
1765	* Insert the replacement string.
1766	*/
1767	char *pszCur = &pExp->StrBuf.pszBuf[off];
1768	if (fLeadingSpace)
1769	*pszCur++ = ' ';
1770	memcpy(pszCur, pchReplacement, cchReplacement);
1771	if (fTrailingSpace)
1772	*pszCur++ = ' ';
1773
1774	Assert(strlen(pExp->StrBuf.pszBuf) == pExp->StrBuf.cchBuf);
1775
1776	return RTEXITCODE_SUCCESS;
1777	}
1778
1779
1780	static unsigned vbcppMacroExpandPeekCh(PVBCPPMACROEXP pExp, size_t *poff)
1781	{
1782	size_t off = *poff;
1783	if (off >= pExp->StrBuf.cchBuf)
1784	return pExp->pStrmInput ? ScmStreamPeekCh(pExp->pStrmInput) : ~(unsigned)0;
1785	return pExp->StrBuf.pszBuf[off];
1786	}
1787
1788
1789	static unsigned vbcppMacroExpandGetCh(PVBCPPMACROEXP pExp, size_t *poff)
1790	{
1791	size_t off = *poff;
1792	if (off >= pExp->StrBuf.cchBuf)
1793	return pExp->pStrmInput ? ScmStreamGetCh(pExp->pStrmInput) : ~(unsigned)0;
1794	*poff = off + 1;
1795	return pExp->StrBuf.pszBuf[off];
1796	}
1797
1798
1799	static RTEXITCODE vbcppMacroExpandSkipEolEx(PVBCPP pThis, PVBCPPMACROEXP pExp, size_t *poff, unsigned chFirst)
1800	{
1801	if (chFirst == '\r')
1802	{
1803	unsigned ch2 = vbcppMacroExpandPeekCh(pExp, poff);
1804	if (ch2 == '\n')
1805	{
1806	ch2 = ScmStreamGetCh(pExp->pStrmInput);
1807	AssertReturn(ch2 == '\n', vbcppError(pThis, "internal error"));
1808	}
1809	}
1810	return RTEXITCODE_SUCCESS;
1811	}
1812
1813
1814	static RTEXITCODE vbcppMacroExpandSkipEol(PVBCPP pThis, PVBCPPMACROEXP pExp, size_t *poff)
1815	{
1816	unsigned ch = vbcppMacroExpandGetCh(pExp, poff);
1817	AssertReturn(ch == '\r' \|\| ch == '\n', vbcppError(pThis, "internal error"));
1818	return vbcppMacroExpandSkipEolEx(pThis, pExp, poff, ch);
1819	}
1820
1821
1822	static RTEXITCODE vbcppMacroExpandSkipCommentLine(PVBCPP pThis, PVBCPPMACROEXP pExp, size_t *poff)
1823	{
1824	unsigned ch = vbcppMacroExpandGetCh(pExp, poff);
1825	AssertReturn(ch == '/', vbcppError(pThis, "Internal error - expected '/' got '%c'", ch));
1826
1827	unsigned chPrev = 0;
1828	while ((ch = vbcppMacroExpandGetCh(pExp, poff)) != ~(unsigned)0)
1829	{
1830	if (ch == '\r' \|\| ch == '\n')
1831	{
1832	RTEXITCODE rcExit = vbcppMacroExpandSkipEolEx(pThis, pExp, poff, ch);
1833	if (rcExit != RTEXITCODE_SUCCESS)
1834	return rcExit;
1835	if (chPrev != '\\')
1836	break;
1837	}
1838
1839	chPrev = ch;
1840	}
1841	return RTEXITCODE_SUCCESS;
1842	}
1843
1844
1845	static RTEXITCODE vbcppMacroExpandSkipComment(PVBCPP pThis, PVBCPPMACROEXP pExp, size_t *poff)
1846	{
1847	unsigned ch = vbcppMacroExpandGetCh(pExp, poff);
1848	AssertReturn(ch == '', vbcppError(pThis, "Internal error - expected '' got '%c'", ch));
1849
1850	unsigned chPrev2 = 0;
1851	unsigned chPrev = 0;
1852	while ((ch = vbcppMacroExpandGetCh(pExp, poff)) != ~(unsigned)0)
1853	{
1854	if (ch == '/' && chPrev == '*')
1855	break;
1856
1857	if (ch == '\r' \|\| ch == '\n')
1858	{
1859	RTEXITCODE rcExit = vbcppMacroExpandSkipEolEx(pThis, pExp, poff, ch);
1860	if (rcExit != RTEXITCODE_SUCCESS)
1861	return rcExit;
1862	if (chPrev == '\\')
1863	{
1864	chPrev = chPrev2; /* for line splicing */
1865	continue;
1866	}
1867	}
1868
1869	chPrev2 = chPrev;
1870	chPrev = ch;
1871	}
1872	return RTEXITCODE_SUCCESS;
1873	}
1874
1875
1876	static RTEXITCODE vbcppMacroExpandGrowArgArray(PVBCPP pThis, PVBCPPMACROEXP pExp, uint32_t cMinArgs)
1877	{
1878	if (cMinArgs > pExp->cArgsAlloced)
1879	{
1880	void pv = RTMemRealloc(pExp->papszArgs, cMinArgs sizeof(char *));
1881	if (!pv)
1882	return vbcppError(pThis, "out of memory");
1883	pExp->papszArgs = (char **)pv;
1884	pExp->cArgsAlloced = cMinArgs;
1885	}
1886	return RTEXITCODE_SUCCESS;
1887	}
1888
1889
1890	static RTEXITCODE vbcppMacroExpandAddEmptyParameter(PVBCPP pThis, PVBCPPMACROEXP pExp)
1891	{
1892	RTEXITCODE rcExit = vbcppMacroExpandGrowArgArray(pThis, pExp, pExp->cArgs + 1);
1893	if (rcExit == RTEXITCODE_SUCCESS)
1894	{
1895	char pszArg = (char )RTMemAllocZ(1);
1896	if (pszArg)
1897	pExp->papszArgs[pExp->cArgs++] = pszArg;
1898	else
1899	rcExit = vbcppError(pThis, "out of memory");
1900	}
1901	return rcExit;
1902	}
1903
1904
1905	static RTEXITCODE vbcppMacroExpandGatherParameters(PVBCPP pThis, PVBCPPMACROEXP pExp, size_t *poff, uint32_t cArgsHint)
1906	{
1907	RTEXITCODE rcExit = RTEXITCODE_SUCCESS;
1908
1909	/*
1910	* Free previous argument values.
1911	*/
1912	while (pExp->cArgs > 0)
1913	{
1914	RTMemFree(pExp->papszArgs[--pExp->cArgs]);
1915	pExp->papszArgs[pExp->cArgs] = NULL;
1916	}
1917
1918	/*
1919	* The current character should be an opening parenthsis.
1920	*/
1921	unsigned ch = vbcppMacroExpandGetCh(pExp, poff);
1922	if (ch != '(')
1923	return vbcppError(pThis, "Internal error - expected '(', found '%c' (#x)", ch, ch);
1924
1925	/*
1926	* Parse the argument list.
1927	*/
1928	char chQuote = 0;
1929	size_t cbArgAlloc = 0;
1930	size_t cchArg = 0;
1931	char *pszArg = NULL;
1932	size_t cParentheses = 1;
1933	unsigned chPrev = 0;
1934	while ((ch = vbcppMacroExpandGetCh(pExp, poff)) != ~(unsigned)0)
1935	{
1936	/** @todo check for '#directives'! */
1937	if (ch == ')' && !chQuote)
1938	{
1939	Assert(cParentheses >= 1);
1940	cParentheses--;
1941
1942	/* The end? */
1943	if (!cParentheses)
1944	{
1945	if (cchArg)
1946	while (cchArg > 0 && RT_C_IS_SPACE(pszArg[cchArg - 1]))
1947	pszArg[--cchArg] = '\0';
1948	else if (pExp->cArgs \|\| cArgsHint > 0)
1949	rcExit = vbcppMacroExpandAddEmptyParameter(pThis, pExp);
1950	break;
1951	}
1952	}
1953	else if (ch == '(' && !chQuote)
1954	cParentheses++;
1955	else if (ch == ',' && cParentheses == 1 && !chQuote)
1956	{
1957	/* End of one argument, start of the next. */
1958	if (cchArg)
1959	while (cchArg > 0 && RT_C_IS_SPACE(pszArg[cchArg - 1]))
1960	pszArg[--cchArg] = '\0';
1961	else
1962	{
1963	rcExit = vbcppMacroExpandAddEmptyParameter(pThis, pExp);
1964	if (rcExit != RTEXITCODE_SUCCESS)
1965	break;
1966	}
1967
1968	cbArgAlloc = 0;
1969	cchArg = 0;
1970	pszArg = NULL;
1971	continue;
1972	}
1973	else if (ch == '/' && !chQuote)
1974	{
1975	/* Comment? */
1976	unsigned ch2 = vbcppMacroExpandPeekCh(pExp, poff);
1977	/** @todo This ain't right wrt line splicing. */
1978	if (ch2 == '/' \|\| ch2 == '*')
1979	{
1980	if (ch2 == '/')
1981	rcExit = vbcppMacroExpandSkipCommentLine(pThis, pExp, poff);
1982	else
1983	rcExit = vbcppMacroExpandSkipComment(pThis, pExp, poff);
1984	if (rcExit != RTEXITCODE_SUCCESS)
1985	break;
1986	continue;
1987	}
1988	}
1989	else if (ch == '"')
1990	{
1991	if (!chQuote)
1992	chQuote = '"';
1993	else if (chPrev != '\\')
1994	chQuote = 0;
1995	}
1996	else if (ch == '\'')
1997	{
1998	if (!chQuote)
1999	chQuote = '\'';
2000	else if (chPrev != '\\')
2001	chQuote = 0;
2002	}
2003	else if (ch == '\\')
2004	{
2005	/* Splice lines? */
2006	unsigned ch2 = vbcppMacroExpandPeekCh(pExp, poff);
2007	if (ch2 == '\r' \|\| ch2 == '\n')
2008	{
2009	rcExit = vbcppMacroExpandSkipEol(pThis, pExp, poff);
2010	if (rcExit != RTEXITCODE_SUCCESS)
2011	break;
2012	continue;
2013	}
2014	}
2015	else if (cchArg == 0 && RT_C_IS_SPACE(ch))
2016	continue; /* ignore spaces leading up to an argument value */
2017
2018	/* Append the character to the argument value, adding the argument
2019	to the output array if it's first character in it. */
2020	if (cchArg + 1 >= cbArgAlloc)
2021	{
2022	/* Add argument to the vector. */
2023	if (!cchArg)
2024	{
2025	rcExit = vbcppMacroExpandGrowArgArray(pThis, pExp, RT_MAX(pExp->cArgs + 1, cArgsHint));
2026	if (rcExit != RTEXITCODE_SUCCESS)
2027	break;
2028	pExp->papszArgs[pExp->cArgs++] = pszArg;
2029	}
2030
2031	/* Resize the argument value buffer. */
2032	cbArgAlloc = cbArgAlloc ? cbArgAlloc * 2 : 16;
2033	pszArg = (char *)RTMemRealloc(pszArg, cbArgAlloc);
2034	if (!pszArg)
2035	{
2036	rcExit = vbcppError(pThis, "out of memory");
2037	break;
2038	}
2039	pExp->papszArgs[pExp->cArgs - 1] = pszArg;
2040	}
2041
2042	pszArg[cchArg++] = ch;
2043	pszArg[cchArg] = '\0';
2044	}
2045
2046	/*
2047	* Check that we're leaving on good terms.
2048	*/
2049	if (rcExit == RTEXITCODE_SUCCESS)
2050	{
2051	if (cParentheses)
2052	rcExit = vbcppError(pThis, "Missing ')'");
2053	}
2054
2055	return rcExit;
2056	}
2057
2058
2059	/**
2060	* Expands the arguments referenced in the macro value.
2061	*
2062	* @returns RTEXITCODE_SUCCESS or RTEXITCODE_FAILURE + msg.
2063	* @param pThis The C preprocessor instance.
2064	* @param pExp The expansion context.
2065	* @param pMacro The macro. Must be a function macro.
2066	* @param pStrBuf String buffer containing the result. The caller
2067	* should initialize and destroy this!
2068	*/
2069	static RTEXITCODE vbcppMacroExpandValueWithArguments(PVBCPP pThis, PVBCPPMACROEXP pExp, PVBCPPMACRO pMacro,
2070	PVBCPPSTRBUF pStrBuf)
2071	{
2072	Assert(pMacro->fFunction);
2073
2074	/*
2075	* Empty?
2076	*/
2077	if ( !pMacro->cchValue
2078	\|\| (pMacro->cchValue == 1 && pMacro->szValue[0] == '#'))
2079	return RTEXITCODE_SUCCESS;
2080
2081	/*
2082	* Parse the value.
2083	*/
2084	RTEXITCODE rcExit = RTEXITCODE_SUCCESS;
2085	const char *pszSrc = pMacro->szValue;
2086	const char *pszSrcSeq;
2087	char ch;
2088	while ((ch = *pszSrc++) != '\0')
2089	{
2090	Assert(ch != '\r'); Assert(ch != '\n'); /* probably not true atm. */
2091	if (ch == '#')
2092	{
2093	if (*pszSrc == '#')
2094	{
2095	/* Concatenate operator. */
2096	rcExit = vbcppError(pThis, "The '##' operatore is not yet implemented");
2097	}
2098	else
2099	{
2100	/* Stringify macro argument. */
2101	rcExit = vbcppError(pThis, "The '#' operatore is not yet implemented");
2102	}
2103	return rcExit;
2104	}
2105	else if (ch == '"')
2106	{
2107	/* String litteral. */
2108	pszSrcSeq = pszSrc - 1;
2109	while ((ch = *pszSrc++) != '"')
2110	{
2111	if (ch == '\\')
2112	ch = *pszSrc++;
2113	if (ch == '\0')
2114	{
2115	rcExit = vbcppError(pThis, "String litteral is missing closing quote (\").");
2116	break;
2117	}
2118	}
2119	if (rcExit != RTEXITCODE_SUCCESS)
2120	break;
2121	rcExit = vbcppStrBufAppendN(pStrBuf, pszSrcSeq, pszSrc - pszSrcSeq);
2122	}
2123	else if (ch == '\'')
2124	{
2125	/* Character constant. */
2126	pszSrcSeq = pszSrc - 1;
2127	while ((ch = *pszSrc++) != '\'')
2128	{
2129	if (ch == '\\')
2130	ch = *pszSrc++;
2131	if (ch == '\0')
2132	{
2133	rcExit = vbcppError(pThis, "Character constant is missing closing quote (').");
2134	break;
2135	}
2136	}
2137	rcExit = vbcppStrBufAppendN(pStrBuf, pszSrcSeq, pszSrc - pszSrcSeq);
2138	}
2139	else if (RT_C_IS_DIGIT(ch))
2140	{
2141	/* Process numerical constants correctly (i.e. don't mess with the suffix). */
2142	pszSrcSeq = pszSrc - 1;
2143	while ( (ch = *pszSrc) != '\0'
2144	&& ( vbcppIsCIdentifierChar(ch)
2145	\|\| ch == '.') )
2146	pszSrc++;
2147	rcExit = vbcppStrBufAppendN(pStrBuf, pszSrcSeq, pszSrc - pszSrcSeq);
2148	}
2149	else if (RT_C_IS_SPACE(ch))
2150	{
2151	/* join spaces */
2152	if (RT_C_IS_SPACE(vbcppStrBufLastCh(pStrBuf)))
2153	continue;
2154	rcExit = vbcppStrBufAppendCh(pStrBuf, ch);
2155	}
2156	else if (vbcppIsCIdentifierLeadChar(ch))
2157	{
2158	/* Something we should replace? */
2159	pszSrcSeq = pszSrc - 1;
2160	while ( (ch = *pszSrc) != '\0'
2161	&& vbcppIsCIdentifierChar(ch))
2162	pszSrc++;
2163	size_t cchDefine = pszSrc - pszSrcSeq;
2164	uint32_t iArg;
2165	if ( VBCPP_BITMAP_IS_SET(pMacro->bmArgs, *pszSrcSeq)
2166	&& (iArg = vbcppMacroLookupArg(pMacro, pszSrcSeq, cchDefine)) != UINT32_MAX)
2167	{
2168	/** @todo check out spaces here! */
2169	if (iArg < pMacro->cArgs)
2170	{
2171	Assert(iArg < pExp->cArgs);
2172	rcExit = vbcppStrBufAppend(pStrBuf, pExp->papszArgs[iArg]);
2173	if (*pExp->papszArgs[iArg] != '\0' && rcExit == RTEXITCODE_SUCCESS)
2174	rcExit = vbcppStrBufAppendCh(pStrBuf, ' ');
2175	}
2176	else
2177	{
2178	/* __VA_ARGS__ */
2179	if (iArg < pExp->cArgs)
2180	{
2181	for (;;)
2182	{
2183	rcExit = vbcppStrBufAppend(pStrBuf, pExp->papszArgs[iArg]);
2184	if (rcExit != RTEXITCODE_SUCCESS)
2185	break;
2186	iArg++;
2187	if (iArg >= pExp->cArgs)
2188	break;
2189	rcExit = vbcppStrBufAppendCh(pStrBuf, ',');
2190	if (rcExit != RTEXITCODE_SUCCESS)
2191	break;
2192	}
2193	}
2194	if (rcExit == RTEXITCODE_SUCCESS)
2195	rcExit = vbcppStrBufAppendCh(pStrBuf, ' ');
2196	}
2197	}
2198	/* Not an argument needing replacing. */
2199	else
2200	rcExit = vbcppStrBufAppendN(pStrBuf, pszSrcSeq, cchDefine);
2201	}
2202	else
2203	{
2204	rcExit = vbcppStrBufAppendCh(pStrBuf, ch);
2205	}
2206	}
2207
2208	return rcExit;
2209	}
2210
2211
2212
2213	/**
2214	* Expands the given macro.
2215	*
2216	* Caller already checked if a function macro should be expanded, i.e. whether
2217	* there is a parameter list.
2218	*
2219	* @returns RTEXITCODE_SUCCESS or RTEXITCODE_FAILURE + msg.
2220	* @param pThis The C preprocessor instance.
2221	* @param pExp The expansion context.
2222	* @param offMacro Offset into the expansion buffer of the macro
2223	* invocation.
2224	* @param pMacro The macro.
2225	* @param offParameters The start of the parameter list if applicable.
2226	* Ignored if not function macro. If the
2227	* parameter list starts at the current stream
2228	* position shall be at the end of the expansion
2229	* buffer.
2230	*/
2231	static RTEXITCODE vbcppMacroExpandIt(PVBCPP pThis, PVBCPPMACROEXP pExp, size_t offMacro, PVBCPPMACRO pMacro,
2232	size_t offParameters)
2233	{
2234	RTEXITCODE rcExit;
2235	Assert(offMacro + pMacro->Core.cchString <= pExp->StrBuf.cchBuf);
2236	Assert(!pMacro->fExpanding);
2237
2238	/*
2239	* Function macros are kind of difficult...
2240	*/
2241	if (pMacro->fFunction)
2242	{
2243	rcExit = vbcppMacroExpandGatherParameters(pThis, pExp, &offParameters, pMacro->cArgs + pMacro->fVarArg);
2244	if (rcExit == RTEXITCODE_SUCCESS)
2245	{
2246	if (pExp->cArgs > pMacro->cArgs && !pMacro->fVarArg)
2247	rcExit = vbcppError(pThis, "Too many arguments to macro '%s' - found %u, expected %u",
2248	pMacro->Core.pszString, pExp->cArgs, pMacro->cArgs);
2249	else if (pExp->cArgs < pMacro->cArgs)
2250	rcExit = vbcppError(pThis, "Too few arguments to macro '%s' - found %u, expected %u",
2251	pMacro->Core.pszString, pExp->cArgs, pMacro->cArgs);
2252	}
2253	if (rcExit == RTEXITCODE_SUCCESS)
2254	{
2255	VBCPPSTRBUF ValueBuf;
2256	vbcppStrBufInit(&ValueBuf, pThis);
2257	rcExit = vbcppMacroExpandValueWithArguments(pThis, pExp, pMacro, &ValueBuf);
2258	if (rcExit == RTEXITCODE_SUCCESS)
2259	rcExit = vbcppMacroExpandReplace(pThis, pExp, offMacro, offParameters - offMacro,
2260	ValueBuf.pszBuf, ValueBuf.cchBuf);
2261	vbcppStrBufDelete(&ValueBuf);
2262	}
2263	}
2264	/*
2265	* Object-like macros are easy. :-)
2266	*/
2267	else
2268	rcExit = vbcppMacroExpandReplace(pThis, pExp, offMacro, pMacro->Core.cchString, pMacro->szValue, pMacro->cchValue);
2269	if (rcExit == RTEXITCODE_SUCCESS)
2270	{
2271	#if 0 /* wrong */
2272	/*
2273	* Push the macro onto the stack.
2274	*/
2275	pMacro->fExpanding = true;
2276	pMacro->pUpExpanding = pExp->pMacroStack;
2277	pExp->pMacroStack = pMacro;
2278	#endif
2279	}
2280
2281	return rcExit;
2282	}
2283
2284
2285	/**
2286	* Looks for a left parenthesis in the macro expansion buffer and the input
2287	* stream.
2288	*
2289	* @retval true if found. The stream position at opening parenthesis.
2290	* @retval false if not found. The stream position is unchanged.
2291	*
2292	* @param pThis The C preprocessor instance.
2293	* @param pExp The expansion context.
2294	* @param poff The current offset in the expansion context.
2295	* Will be updated on success.
2296	*
2297	* @sa vbcppInputLookForLeftParenthesis
2298	*/
2299	static bool vbcppMacroExpandLookForLeftParenthesis(PVBCPP pThis, PVBCPPMACROEXP pExp, size_t *poff)
2300	{
2301	/*
2302	* Search the buffer first. (No comments there.)
2303	*/
2304	size_t off = *poff;
2305	while (off < pExp->StrBuf.cchBuf)
2306	{
2307	char ch = pExp->StrBuf.pszBuf[off];
2308	if (!RT_C_IS_SPACE(ch))
2309	{
2310	if (ch == '(')
2311	{
2312	*poff = off;
2313	return true;
2314	}
2315	return false;
2316	}
2317	off++;
2318	}
2319
2320	/*
2321	* Reached the end of the buffer, continue searching in the stream.
2322	*/
2323	PSCMSTREAM pStrmInput = pExp->pStrmInput;
2324	size_t offSaved = ScmStreamTell(pStrmInput);
2325	/RTEXITCODE rcExit = / vbcppProcessSkipWhiteEscapedEolAndComments(pThis, pStrmInput);
2326	unsigned ch = ScmStreamPeekCh(pStrmInput);
2327	if (ch == '(')
2328	{
2329	*poff = pExp->StrBuf.cchBuf;
2330	return true;
2331	}
2332
2333	int rc = ScmStreamSeekAbsolute(pStrmInput, offSaved);
2334	AssertFatalRC(rc);
2335	return false;
2336	}
2337
2338
2339	/**
2340	* Implements the 'defined' unary operator for \#if and \#elif expressions.
2341	*
2342	* @returns RTEXITCODE_SUCCESS or RTEXITCODE_FAILURE + msg.
2343	* @param pThis The C preprocessor instance.
2344	* @param pExp The expansion context.
2345	* @param offStart The expansion buffer offset where the 'defined'
2346	* occurs.
2347	* @param poff Where to store the offset at which the re-scan
2348	* shall resume upon return.
2349	*/
2350	static RTEXITCODE vbcppMacroExpandDefinedOperator(PVBCPP pThis, PVBCPPMACROEXP pExp, size_t offStart, size_t *poff)
2351	{
2352	Assert(!pExp->pStrmInput); /* offset usage below. */
2353
2354	/*
2355	* Skip white space.
2356	*/
2357	unsigned ch;
2358	while ((ch = vbcppMacroExpandGetCh(pExp, poff)) != ~(unsigned)0)
2359	if (!RT_C_IS_SPACE(ch))
2360	break;
2361	bool const fWithParenthesis = ch == '(';
2362	if (fWithParenthesis)
2363	while ((ch = vbcppMacroExpandGetCh(pExp, poff)) != ~(unsigned)0)
2364	if (!RT_C_IS_SPACE(ch))
2365	break;
2366
2367	/*
2368	* Macro identifier.
2369	*/
2370	if (!vbcppIsCIdentifierLeadChar(ch))
2371	return vbcppError(pThis, "Expected macro name after 'defined' operator");
2372
2373	size_t const offDefine = *poff - 1;
2374	while ((ch = vbcppMacroExpandGetCh(pExp, poff)) != ~(unsigned)0)
2375	if (!vbcppIsCIdentifierChar(ch))
2376	break;
2377	size_t const cchDefine = *poff - offDefine - 1;
2378
2379	/*
2380	* Check for closing parenthesis.
2381	*/
2382	if (fWithParenthesis)
2383	{
2384	while (RT_C_IS_SPACE(ch))
2385	ch = vbcppMacroExpandGetCh(pExp, poff);
2386	if (ch != ')')
2387	return vbcppError(pThis, "Expected closing parenthesis after macro name");
2388	}
2389
2390	/*
2391	* Do the job.
2392	*/
2393	const char *pszResult = vbcppMacroExists(pThis, &pExp->StrBuf.pszBuf[offDefine], cchDefine)
2394	? "1" : "0";
2395	RTEXITCODE rcExit = vbcppMacroExpandReplace(pThis, pExp, offStart, *poff - offStart, pszResult, 1);
2396	*poff = offStart + 1;
2397	return rcExit;
2398	}
2399
2400
2401	/**
2402	* Re-scan the expanded macro.
2403	*
2404	* @returns RTEXITCODE_SUCCESS or RTEXITCODE_FAILURE + msg.
2405	* @param pThis The C preprocessor instance.
2406	* @param pExp The expansion context.
2407	* @param enmMode The re-scan mode.
2408	* @param pcReplacements Where to return the number of replacements
2409	* performed. Optional.
2410	* @param pcDefinedUnknown Where to return the number of defined() checks
2411	* on unknown macros. Optional.
2412	*/
2413	static RTEXITCODE vbcppMacroExpandReScan(PVBCPP pThis, PVBCPPMACROEXP pExp, VBCPPMACRORESCANMODE enmMode,
2414	size_t pcReplacements, size_t pcDefinedUnknown)
2415	{
2416	RTEXITCODE rcExit = RTEXITCODE_SUCCESS;
2417	size_t cReplacements = 0;
2418	size_t cDefinedUnknown = 0;
2419	size_t off = 0;
2420	unsigned ch;
2421	while ( off < pExp->StrBuf.cchBuf
2422	&& (ch = vbcppMacroExpandGetCh(pExp, &off)) != ~(unsigned)0)
2423	{
2424	/*
2425	* String litteral or character constant.
2426	*/
2427	if (ch == '\'' \|\| ch == '"')
2428	{
2429	unsigned const chEndQuote = ch;
2430	while ( off < pExp->StrBuf.cchBuf
2431	&& (ch = vbcppMacroExpandGetCh(pExp, &off)) != ~(unsigned)0)
2432	{
2433	if (ch == '\\')
2434	{
2435	ch = vbcppMacroExpandGetCh(pExp, &off);
2436	if (ch == ~(unsigned)0)
2437	break;
2438	}
2439	else if (ch == chEndQuote)
2440	break;
2441	}
2442	if (ch == ~(unsigned)0)
2443	return vbcppError(pThis, "Missing end quote (%c)", chEndQuote);
2444	}
2445	/*
2446	* Number constant.
2447	*/
2448	else if ( RT_C_IS_DIGIT(ch)
2449	\|\| ( ch == '.'
2450	&& off + 1 < pExp->StrBuf.cchBuf
2451	&& RT_C_IS_DIGIT(vbcppMacroExpandPeekCh(pExp, &off))
2452	)
2453	)
2454	{
2455	while ( off < pExp->StrBuf.cchBuf
2456	&& (ch = vbcppMacroExpandPeekCh(pExp, &off)) != ~(unsigned)0
2457	&& vbcppIsCIdentifierChar(ch) )
2458	vbcppMacroExpandGetCh(pExp, &off);
2459	}
2460	/*
2461	* Something that can be replaced?
2462	*/
2463	else if (vbcppIsCIdentifierLeadChar(ch))
2464	{
2465	size_t offDefine = off - 1;
2466	while ( off < pExp->StrBuf.cchBuf
2467	&& (ch = vbcppMacroExpandPeekCh(pExp, &off)) != ~(unsigned)0
2468	&& vbcppIsCIdentifierChar(ch) )
2469	vbcppMacroExpandGetCh(pExp, &off);
2470	size_t cchDefine = off - offDefine;
2471
2472	PVBCPPMACRO pMacro = vbcppMacroLookup(pThis, &pExp->StrBuf.pszBuf[offDefine], cchDefine);
2473	if ( pMacro
2474	&& ( !pMacro->fFunction
2475	\|\| vbcppMacroExpandLookForLeftParenthesis(pThis, pExp, &off)) )
2476	{
2477	cReplacements++;
2478	rcExit = vbcppMacroExpandIt(pThis, pExp, offDefine, pMacro, off);
2479	off = offDefine;
2480	}
2481	else
2482	{
2483	if ( !pMacro
2484	&& enmMode == kMacroReScanMode_Expression
2485	&& cchDefine == sizeof("defined") - 1
2486	&& !strncmp(&pExp->StrBuf.pszBuf[offDefine], "defined", cchDefine))
2487	{
2488	cReplacements++;
2489	cDefinedUnknown++;
2490	rcExit = vbcppMacroExpandDefinedOperator(pThis, pExp, offDefine, &off);
2491	}
2492	else
2493	off = offDefine + cchDefine;
2494	}
2495	}
2496	else
2497	{
2498	Assert(RT_C_IS_SPACE(ch) \|\| RT_C_IS_PUNCT(ch));
2499	Assert(ch != '\r' && ch != '\n');
2500	}
2501	}
2502
2503	if (pcReplacements)
2504	*pcReplacements = cReplacements;
2505	if (pcDefinedUnknown)
2506	*pcDefinedUnknown = cDefinedUnknown;
2507	return rcExit;
2508	}
2509
2510
2511	/**
2512	* Cleans up the expansion context.
2513	*
2514	* This involves clearing VBCPPMACRO::fExpanding and VBCPPMACRO::pUpExpanding,
2515	* and freeing the memory resources associated with the expansion context.
2516	*
2517	* @param pExp The expansion context.
2518	*/
2519	static void vbcppMacroExpandCleanup(PVBCPPMACROEXP pExp)
2520	{
2521	#if 0
2522	while (pExp->pMacroStack)
2523	{
2524	PVBCPPMACRO pMacro = pExp->pMacroStack;
2525	pExp->pMacroStack = pMacro->pUpExpanding;
2526
2527	pMacro->fExpanding = false;
2528	pMacro->pUpExpanding = NULL;
2529	}
2530	#endif
2531
2532	while (pExp->cArgs > 0)
2533	{
2534	RTMemFree(pExp->papszArgs[--pExp->cArgs]);
2535	pExp->papszArgs[pExp->cArgs] = NULL;
2536	}
2537
2538	RTMemFree(pExp->papszArgs);
2539	pExp->papszArgs = NULL;
2540
2541	vbcppStrBufDelete(&pExp->StrBuf);
2542	}
2543
2544
2545
2546	/**
2547	* Frees a define.
2548	*
2549	* @returns VINF_SUCCESS (used when called by RTStrSpaceDestroy)
2550	* @param pStr Pointer to the VBCPPMACRO::Core member.
2551	* @param pvUser Unused.
2552	*/
2553	static DECLCALLBACK(int) vbcppMacroFree(PRTSTRSPACECORE pStr, void *pvUser)
2554	{
2555	RTMemFree(pStr);
2556	NOREF(pvUser);
2557	return VINF_SUCCESS;
2558	}
2559
2560
2561	/**
2562	* Removes a define.
2563	*
2564	* @returns RTEXITCODE_SUCCESS or RTEXITCODE_FAILURE + msg.
2565	* @param pThis The C preprocessor instance.
2566	* @param pszDefine The define name, no argument list or anything.
2567	* @param cchDefine The length of the name. RTSTR_MAX is ok.
2568	* @param fExplicitUndef Explicit undefinition, that is, in a selective
2569	* preprocessing run it will evaluate to undefined.
2570	*/
2571	static RTEXITCODE vbcppMacroUndef(PVBCPP pThis, const char *pszDefine, size_t cchDefine, bool fExplicitUndef)
2572	{
2573	PRTSTRSPACECORE pHit = RTStrSpaceGetN(&pThis->StrSpace, pszDefine, cchDefine);
2574	if (pHit)
2575	{
2576	RTStrSpaceRemove(&pThis->StrSpace, pHit->pszString);
2577	vbcppMacroFree(pHit, NULL);
2578	}
2579
2580	if (fExplicitUndef)
2581	{
2582	if (cchDefine == RTSTR_MAX)
2583	cchDefine = strlen(pszDefine);
2584
2585	PRTSTRSPACECORE pStr = (PRTSTRSPACECORE)RTMemAlloc(sizeof(*pStr) + cchDefine + 1);
2586	if (!pStr)
2587	return vbcppError(pThis, "out of memory");
2588	char pszDst = (char )(pStr + 1);
2589	pStr->pszString = pszDst;
2590	memcpy(pszDst, pszDefine, cchDefine);
2591	pszDst[cchDefine] = '\0';
2592	if (!RTStrSpaceInsert(&pThis->UndefStrSpace, pStr))
2593	RTMemFree(pStr);
2594	}
2595
2596	return RTEXITCODE_SUCCESS;
2597	}
2598
2599
2600	/**
2601	* Inserts a define (rejecting and freeing it in some case).
2602	*
2603	* @returns RTEXITCODE_SUCCESS or RTEXITCODE_FAILURE + msg.
2604	* @param pThis The C preprocessor instance.
2605	* @param pMacro The define to insert.
2606	*/
2607	static RTEXITCODE vbcppMacroInsert(PVBCPP pThis, PVBCPPMACRO pMacro)
2608	{
2609	/*
2610	* Reject illegal macro names.
2611	*/
2612	if (!strcmp(pMacro->Core.pszString, "defined"))
2613	{
2614	RTEXITCODE rcExit = vbcppError(pThis, "Cannot use '%s' as a macro name", pMacro->Core.pszString);
2615	vbcppMacroFree(&pMacro->Core, NULL);
2616	return rcExit;
2617	}
2618
2619	/*
2620	* Ignore in source-file defines when doing selective preprocessing.
2621	*/
2622	if ( !pThis->fRespectSourceDefines
2623	&& !pMacro->fCmdLine)
2624	{
2625	/* Ignore*/
2626	vbcppMacroFree(&pMacro->Core, NULL);
2627	return RTEXITCODE_SUCCESS;
2628	}
2629
2630	/*
2631	* Insert it and update the lead character hint bitmap.
2632	*/
2633	if (RTStrSpaceInsert(&pThis->StrSpace, &pMacro->Core))
2634	VBCPP_BITMAP_SET(pThis->bmDefined, *pMacro->Core.pszString);
2635	else
2636	{
2637	/*
2638	* Duplicate. When doing selective D preprocessing, let the command
2639	* line take precendece.
2640	*/
2641	PVBCPPMACRO pOld = (PVBCPPMACRO)RTStrSpaceGet(&pThis->StrSpace, pMacro->Core.pszString); Assert(pOld);
2642	if ( pThis->fAllowRedefiningCmdLineDefines
2643	\|\| pMacro->fCmdLine == pOld->fCmdLine)
2644	{
2645	if (pMacro->fCmdLine)
2646	RTMsgWarning("Redefining '%s'", pMacro->Core.pszString);
2647
2648	RTStrSpaceRemove(&pThis->StrSpace, pOld->Core.pszString);
2649	vbcppMacroFree(&pOld->Core, NULL);
2650
2651	bool fRc = RTStrSpaceInsert(&pThis->StrSpace, &pMacro->Core);
2652	Assert(fRc); NOREF(fRc);
2653	}
2654	else
2655	{
2656	RTMsgWarning("Ignoring redefinition of '%s'", pMacro->Core.pszString);
2657	vbcppMacroFree(&pMacro->Core, NULL);
2658	}
2659	}
2660
2661	return RTEXITCODE_SUCCESS;
2662	}
2663
2664
2665	/**
2666	* Adds a define.
2667	*
2668	* @returns RTEXITCODE_SUCCESS or RTEXITCODE_FAILURE + msg.
2669	* @param pThis The C preprocessor instance.
2670	* @param pszDefine The define name, no parameter list.
2671	* @param cchDefine The length of the name.
2672	* @param pszParams The parameter list.
2673	* @param cchParams The length of the parameter list.
2674	* @param pszValue The value.
2675	* @param cchDefine The length of the value.
2676	* @param fCmdLine Set if originating on the command line.
2677	*/
2678	static RTEXITCODE vbcppMacroAddFn(PVBCPP pThis, const char *pszDefine, size_t cchDefine,
2679	const char *pszParams, size_t cchParams,
2680	const char *pszValue, size_t cchValue,
2681	bool fCmdLine)
2682
2683	{
2684	Assert(RTStrNLen(pszDefine, cchDefine) == cchDefine);
2685	Assert(RTStrNLen(pszParams, cchParams) == cchParams);
2686	Assert(RTStrNLen(pszValue, cchValue) == cchValue);
2687
2688	/*
2689	* Determin the number of arguments and how much space their names
2690	* requires. Performing syntax validation while parsing.
2691	*/
2692	bool fVariadic = false;
2693	size_t cchArgNames = 0;
2694	uint32_t cArgs = 0;
2695	for (size_t off = 0; off < cchParams; off++)
2696	{
2697	/* Skip blanks and maybe one comma. */
2698	bool fIgnoreComma = cArgs != 0;
2699	while (off < cchParams)
2700	{
2701	if ( !RT_C_IS_SPACE(pszParams[off])
2702	&& ( pszParams[off] != '\\'
2703	\|\| (pszParams[off + 1] != '\n' && pszParams[off + 1] != '\r')))
2704	{
2705	if (pszParams[off] != ',' \|\| !fIgnoreComma)
2706	{
2707	if (vbcppIsCIdentifierLeadChar(pszParams[off]))
2708	break;
2709
2710	/* Check for variadic macro argument, just parsing it for now. */
2711	if ( pszParams[off] == '.'
2712	&& off + 3 <= cchParams
2713	&& pszParams[off + 1] == '.'
2714	&& pszParams[off + 2] == '.')
2715	{
2716	size_t const offSaved = off;
2717	off += 3;
2718	while (off < cchParams && RT_C_IS_SPACE(pszParams[off]))
2719	off++;
2720	if (off == cchParams)
2721	{
2722	cArgs++;
2723	cchArgNames += sizeof("...");
2724	fVariadic = true;
2725	break;
2726	}
2727	off = offSaved;
2728	}
2729	return vbcppErrorPos(pThis, &pszParams[off], "Unexpected character (%#x, off=%zu)", pszParams[off], off);
2730	}
2731	fIgnoreComma = false;
2732	}
2733	off++;
2734	}
2735	if (off >= cchParams)
2736	break;
2737
2738	/* Found and argument. First character is already validated. */
2739	cArgs++;
2740	cchArgNames += 2;
2741	off++;
2742	while ( off < cchParams
2743	&& vbcppIsCIdentifierChar(pszParams[off]))
2744	off++, cchArgNames++;
2745	}
2746
2747	/*
2748	* Allocate a structure.
2749	*/
2750	size_t cbDef = RT_UOFFSETOF_DYN(VBCPPMACRO, szValue[cchValue + 1 + cchDefine + 1 + cchArgNames])
2751	+ sizeof(const char ) cArgs;
2752	cbDef = RT_ALIGN_Z(cbDef, sizeof(const char *));
2753	PVBCPPMACRO pMacro = (PVBCPPMACRO)RTMemAlloc(cbDef);
2754	if (!pMacro)
2755	return RTMsgErrorExit(RTEXITCODE_FAILURE, "out of memory");
2756
2757	char *pszDst = &pMacro->szValue[cchValue + 1];
2758	pMacro->Core.pszString = pszDst;
2759	memcpy(pszDst, pszDefine, cchDefine);
2760	pszDst += cchDefine;
2761	*pszDst++ = '\0';
2762	pMacro->fFunction = true;
2763	pMacro->fVarArg = fVariadic;
2764	pMacro->fCmdLine = fCmdLine;
2765	pMacro->fExpanding = false;
2766	pMacro->cArgs = cArgs;
2767	pMacro->papszArgs = (const char *)((uintptr_t)pMacro + cbDef - sizeof(const char ) * cArgs);
2768	VBCPP_BITMAP_EMPTY(pMacro->bmArgs);
2769	pMacro->cchValue = cchValue;
2770	memcpy(pMacro->szValue, pszValue, cchValue);
2771	pMacro->szValue[cchValue] = '\0';
2772
2773	/*
2774	* Set up the arguments.
2775	*/
2776	uint32_t iArg = 0;
2777	for (size_t off = 0; off < cchParams; off++)
2778	{
2779	/* Skip blanks and maybe one comma. */
2780	bool fIgnoreComma = cArgs != 0;
2781	while (off < cchParams)
2782	{
2783	if ( !RT_C_IS_SPACE(pszParams[off])
2784	&& ( pszParams[off] != '\\'
2785	\|\| (pszParams[off + 1] != '\n' && pszParams[off + 1] != '\r')))
2786	{
2787	if (pszParams[off] != ',' \|\| !fIgnoreComma)
2788	break;
2789	fIgnoreComma = false;
2790	}
2791	off++;
2792	}
2793	if (off >= cchParams)
2794	break;
2795
2796	/* Found and argument. First character is already validated. */
2797	pMacro->papszArgs[iArg] = pszDst;
2798	if (!fVariadic \|\| iArg + 1 < cArgs)
2799	{
2800	VBCPP_BITMAP_SET(pMacro->bmArgs, pszParams[off]);
2801	do
2802	{
2803	*pszDst++ = pszParams[off++];
2804	} while ( off < cchParams
2805	&& vbcppIsCIdentifierChar(pszParams[off]));
2806	}
2807	else
2808	{
2809	Assert(strncmp(&pszParams[off], "...", 3) == 0);
2810	VBCPP_BITMAP_SET(pMacro->bmArgs, '_'); /* __VA_ARGS__ */
2811	off += 3;
2812	*pszDst++ = '.';
2813	*pszDst++ = '.';
2814	*pszDst++ = '.';
2815	}
2816	*pszDst++ = '\0';
2817	iArg++;
2818	}
2819	Assert((uintptr_t)pszDst <= (uintptr_t)pMacro->papszArgs);
2820
2821	return vbcppMacroInsert(pThis, pMacro);
2822	}
2823
2824
2825	/**
2826	* Adds a define.
2827	*
2828	* @returns RTEXITCODE_SUCCESS or RTEXITCODE_FAILURE + msg.
2829	* @param pThis The C preprocessor instance.
2830	* @param pszDefine The define name and optionally the argument
2831	* list.
2832	* @param cchDefine The length of the name. RTSTR_MAX is ok.
2833	* @param pszValue The value.
2834	* @param cchDefine The length of the value. RTSTR_MAX is ok.
2835	* @param fCmdLine Set if originating on the command line.
2836	*/
2837	static RTEXITCODE vbcppMacroAdd(PVBCPP pThis, const char *pszDefine, size_t cchDefine,
2838	const char *pszValue, size_t cchValue, bool fCmdLine)
2839	{
2840	/*
2841	* We need the lengths. Trim the input.
2842	*/
2843	if (cchDefine == RTSTR_MAX)
2844	cchDefine = strlen(pszDefine);
2845	while (cchDefine > 0 && RT_C_IS_SPACE(*pszDefine))
2846	pszDefine++, cchDefine--;
2847	while (cchDefine > 0 && RT_C_IS_SPACE(pszDefine[cchDefine - 1]))
2848	cchDefine--;
2849	if (!cchDefine)
2850	return vbcppErrorPos(pThis, pszDefine, "The define has no name");
2851
2852	if (cchValue == RTSTR_MAX)
2853	cchValue = strlen(pszValue);
2854	while (cchValue > 0 && RT_C_IS_SPACE(*pszValue))
2855	pszValue++, cchValue--;
2856	while (cchValue > 0 && RT_C_IS_SPACE(pszValue[cchValue - 1]))
2857	cchValue--;
2858
2859	/*
2860	* Arguments make the job a bit more annoying. Handle that elsewhere
2861	*/
2862	const char pszParams = (const char )memchr(pszDefine, '(', cchDefine);
2863	if (pszParams)
2864	{
2865	size_t cchParams = pszDefine + cchDefine - pszParams;
2866	cchDefine -= cchParams;
2867	if (!vbcppValidateCIdentifier(pThis, pszDefine, cchDefine))
2868	return RTEXITCODE_FAILURE;
2869	if (pszParams[cchParams - 1] != ')')
2870	return vbcppErrorPos(pThis, pszParams + cchParams - 1, "Missing closing parenthesis");
2871	pszParams++;
2872	cchParams -= 2;
2873	return vbcppMacroAddFn(pThis, pszDefine, cchDefine, pszParams, cchParams, pszValue, cchValue, fCmdLine);
2874	}
2875
2876	/*
2877	* Simple define, no arguments.
2878	*/
2879	if (!vbcppValidateCIdentifier(pThis, pszDefine, cchDefine))
2880	return RTEXITCODE_FAILURE;
2881
2882	PVBCPPMACRO pMacro = (PVBCPPMACRO)RTMemAlloc(RT_UOFFSETOF_DYN(VBCPPMACRO, szValue[cchValue + 1 + cchDefine + 1]));
2883	if (!pMacro)
2884	return RTMsgErrorExit(RTEXITCODE_FAILURE, "out of memory");
2885
2886	pMacro->Core.pszString = &pMacro->szValue[cchValue + 1];
2887	memcpy((char *)pMacro->Core.pszString, pszDefine, cchDefine);
2888	((char *)pMacro->Core.pszString)[cchDefine] = '\0';
2889	pMacro->fFunction = false;
2890	pMacro->fVarArg = false;
2891	pMacro->fCmdLine = fCmdLine;
2892	pMacro->fExpanding = false;
2893	pMacro->cArgs = 0;
2894	pMacro->papszArgs = NULL;
2895	VBCPP_BITMAP_EMPTY(pMacro->bmArgs);
2896	pMacro->cchValue = cchValue;
2897	memcpy(pMacro->szValue, pszValue, cchValue);
2898	pMacro->szValue[cchValue] = '\0';
2899
2900	return vbcppMacroInsert(pThis, pMacro);
2901	}
2902
2903
2904	/**
2905	* Tries to convert a define into an inline D constant.
2906	*
2907	* @returns RTEXITCODE_SUCCESS or RTEXITCODE_FAILURE+msg.
2908	* @param pThis The C preprocessor instance.
2909	* @param pMacro The macro.
2910	*/
2911	static RTEXITCODE vbcppMacroTryConvertToInlineD(PVBCPP pThis, PVBCPPMACRO pMacro)
2912	{
2913	AssertReturn(pMacro, vbcppError(pThis, "Internal error"));
2914	if (pMacro->fFunction)
2915	return RTEXITCODE_SUCCESS;
2916
2917	/*
2918	* Do some simple macro resolving. (Mostly to make x86.h work.)
2919	*/
2920	const char *pszDefine = pMacro->Core.pszString;
2921	const char *pszValue = pMacro->szValue;
2922	size_t cchValue = pMacro->cchValue;
2923
2924	unsigned i = 0;
2925	PVBCPPMACRO pMacro2;
2926	while ( i < 10
2927	&& cchValue > 0
2928	&& vbcppIsCIdentifierLeadChar(*pszValue)
2929	&& (pMacro2 = vbcppMacroLookup(pThis, pszValue, cchValue)) != NULL
2930	&& !pMacro2->fFunction )
2931	{
2932	pszValue = pMacro2->szValue;
2933	cchValue = pMacro2->cchValue;
2934	i++;
2935	}
2936
2937	if (!pMacro->cchValue)
2938	return RTEXITCODE_SUCCESS;
2939
2940
2941	/*
2942	* A lone value?
2943	*/
2944	ssize_t cch = 0;
2945	uint64_t u64;
2946	char *pszNext;
2947	int rc = RTStrToUInt64Ex(pszValue, &pszNext, 0, &u64);
2948	if (RT_SUCCESS(rc))
2949	{
2950	if ( rc == VWRN_TRAILING_SPACES
2951	\|\| rc == VWRN_NEGATIVE_UNSIGNED
2952	\|\| rc == VWRN_NUMBER_TOO_BIG)
2953	return RTEXITCODE_SUCCESS;
2954	const char *pszType;
2955	if (rc == VWRN_TRAILING_CHARS)
2956	{
2957	if (!strcmp(pszNext, "u") \|\| !strcmp(pszNext, "U"))
2958	pszType = "uint32_t";
2959	else if (!strcmp(pszNext, "ul") \|\| !strcmp(pszNext, "UL"))
2960	pszType = "uintptr_t";
2961	else if (!strcmp(pszNext, "ull") \|\| !strcmp(pszNext, "ULL"))
2962	pszType = "uint64_t";
2963	else
2964	pszType = NULL;
2965	}
2966	else if (u64 <= UINT8_MAX)
2967	pszType = "uint8_t";
2968	else if (u64 <= UINT16_MAX)
2969	pszType = "uint16_t";
2970	else if (u64 <= UINT32_MAX)
2971	pszType = "uint32_t";
2972	else
2973	pszType = "uint64_t";
2974	if (!pszType)
2975	return RTEXITCODE_SUCCESS;
2976	cch = ScmStreamPrintf(&pThis->StrmOutput, "inline %s %s = %.*s;\n",
2977	pszType, pszDefine, pszNext - pszValue, pszValue);
2978	}
2979	/*
2980	* A value wrapped in a constant macro?
2981	*/
2982	else if ( (pszNext = (char *)strchr(pszValue, '(')) != NULL
2983	&& pszValue[cchValue - 1] == ')' )
2984	{
2985	size_t cchPrefix = pszNext - pszValue;
2986	size_t cchInnerValue = cchValue - cchPrefix - 2;
2987	const char *pchInnerValue = &pszValue[cchPrefix + 1];
2988	while (cchInnerValue > 0 && RT_C_IS_SPACE(*pchInnerValue))
2989	cchInnerValue--, pchInnerValue++;
2990	while (cchInnerValue > 0 && RT_C_IS_SPACE(pchInnerValue[cchInnerValue - 1]))
2991	cchInnerValue--;
2992	if (!cchInnerValue \|\| !RT_C_IS_XDIGIT(*pchInnerValue))
2993	return RTEXITCODE_SUCCESS;
2994
2995	rc = RTStrToUInt64Ex(pchInnerValue, &pszNext, 0, &u64);
2996	if ( RT_FAILURE(rc)
2997	\|\| rc == VWRN_TRAILING_SPACES
2998	\|\| rc == VWRN_NEGATIVE_UNSIGNED
2999	\|\| rc == VWRN_NUMBER_TOO_BIG)
3000	return RTEXITCODE_SUCCESS;
3001
3002	const char *pszType;
3003	#define MY_MATCH_STR(a_sz) (sizeof(a_sz) - 1 == cchPrefix && !strncmp(pszValue, a_sz, sizeof(a_sz) - 1))
3004	if (MY_MATCH_STR("UINT8_C"))
3005	pszType = "uint8_t";
3006	else if (MY_MATCH_STR("UINT16_C"))
3007	pszType = "uint16_t";
3008	else if (MY_MATCH_STR("UINT32_C"))
3009	pszType = "uint32_t";
3010	else if (MY_MATCH_STR("UINT64_C"))
3011	pszType = "uint64_t";
3012	else
3013	pszType = NULL;
3014	if (pszType)
3015	cch = ScmStreamPrintf(&pThis->StrmOutput, "inline %s %s = %.*s;\n",
3016	pszType, pszDefine, cchInnerValue, pchInnerValue);
3017	else if (MY_MATCH_STR("RT_BIT") \|\| MY_MATCH_STR("RT_BIT_32"))
3018	cch = ScmStreamPrintf(&pThis->StrmOutput, "inline uint32_t %s = 1U << %llu;\n",
3019	pszDefine, u64);
3020	else if (MY_MATCH_STR("RT_BIT_64"))
3021	cch = ScmStreamPrintf(&pThis->StrmOutput, "inline uint64_t %s = 1ULL << %llu;\n",
3022	pszDefine, u64);
3023	else
3024	return RTEXITCODE_SUCCESS;
3025	#undef MY_MATCH_STR
3026	}
3027	/* Dunno what this is... */
3028	else
3029	return RTEXITCODE_SUCCESS;
3030
3031	/*
3032	* Check for output error and clear the output suppression indicator.
3033	*/
3034	if (cch < 0)
3035	return vbcppError(pThis, "Output error");
3036
3037	pThis->fJustDroppedLine = false;
3038	return RTEXITCODE_SUCCESS;
3039	}
3040
3041
3042
3043	/**
3044	* Processes a abbreviated line number directive.
3045	*
3046	* @returns RTEXITCODE_SUCCESS or RTEXITCODE_FAILURE+msg.
3047	* @param pThis The C preprocessor instance.
3048	* @param pStrmInput The input stream.
3049	* @param offStart The stream position where the directive
3050	* started (for pass thru).
3051	*/
3052	static RTEXITCODE vbcppDirectiveDefine(PVBCPP pThis, PSCMSTREAM pStrmInput, size_t offStart)
3053	{
3054	RT_NOREF_PV(offStart);
3055
3056	/*
3057	* Parse it.
3058	*/
3059	RTEXITCODE rcExit = vbcppProcessSkipWhiteEscapedEolAndComments(pThis, pStrmInput);
3060	if (rcExit == RTEXITCODE_SUCCESS)
3061	{
3062	size_t cchDefine;
3063	const char *pchDefine = ScmStreamCGetWord(pStrmInput, &cchDefine);
3064	if (pchDefine)
3065	{
3066	/* If it's a function style define, parse out the parameter list. */
3067	size_t cchParams = 0;
3068	const char *pchParams = NULL;
3069	unsigned ch = ScmStreamPeekCh(pStrmInput);
3070	if (ch == '(')
3071	{
3072	ScmStreamGetCh(pStrmInput);
3073	pchParams = ScmStreamGetCur(pStrmInput);
3074
3075	unsigned chPrev = ch;
3076	while ((ch = ScmStreamPeekCh(pStrmInput)) != ~(unsigned)0)
3077	{
3078	if (ch == '\r' \|\| ch == '\n')
3079	{
3080	if (chPrev != '\\')
3081	{
3082	rcExit = vbcppError(pThis, "Missing ')'");
3083	break;
3084	}
3085	ScmStreamSeekByLine(pStrmInput, ScmStreamTellLine(pStrmInput) + 1);
3086	}
3087	if (ch == ')')
3088	{
3089	cchParams = ScmStreamGetCur(pStrmInput) - pchParams;
3090	ScmStreamGetCh(pStrmInput);
3091	break;
3092	}
3093	chPrev = ch;
3094	ScmStreamGetCh(pStrmInput);
3095	}
3096	}
3097	/* The simple kind. */
3098	else if (!RT_C_IS_SPACE(ch) && ch != ~(unsigned)0)
3099	rcExit = vbcppError(pThis, "Expected whitespace after macro name");
3100
3101	/* Parse out the value. */
3102	if (rcExit == RTEXITCODE_SUCCESS)
3103	rcExit = vbcppProcessSkipWhiteEscapedEolAndComments(pThis, pStrmInput);
3104	if (rcExit == RTEXITCODE_SUCCESS)
3105	{
3106	size_t offValue = ScmStreamTell(pStrmInput);
3107	const char *pchValue = ScmStreamGetCur(pStrmInput);
3108	unsigned chPrev = ch;
3109	while ((ch = ScmStreamPeekCh(pStrmInput)) != ~(unsigned)0)
3110	{
3111	if (ch == '\r' \|\| ch == '\n')
3112	{
3113	if (chPrev != '\\')
3114	break;
3115	ScmStreamSeekByLine(pStrmInput, ScmStreamTellLine(pStrmInput) + 1);
3116	}
3117	chPrev = ScmStreamGetCh(pStrmInput);
3118	}
3119	size_t cchValue = ScmStreamGetCur(pStrmInput) - pchValue;
3120
3121	/*
3122	* Execute.
3123	*/
3124	if (pchParams)
3125	rcExit = vbcppMacroAddFn(pThis, pchDefine, cchDefine, pchParams, cchParams, pchValue, cchValue, false);
3126	else
3127	rcExit = vbcppMacroAdd(pThis, pchDefine, cchDefine, pchValue, cchValue, false);
3128
3129	/*
3130	* Pass thru?
3131	*/
3132	if ( rcExit == RTEXITCODE_SUCCESS
3133	&& pThis->fPassThruDefines)
3134	{
3135	unsigned cchIndent = pThis->pCondStack ? pThis->pCondStack->iKeepLevel : 0;
3136	ssize_t cch;
3137	if (pchParams)
3138	cch = ScmStreamPrintf(&pThis->StrmOutput, "#%sdefine %.s(%.*s)",
3139	cchIndent, "", cchDefine, pchDefine, cchParams, pchParams);
3140	else
3141	cch = ScmStreamPrintf(&pThis->StrmOutput, "#%sdefine %.s",
3142	cchIndent, "", cchDefine, pchDefine);
3143	if (cch > 0)
3144	vbcppOutputComment(pThis, pStrmInput, offValue, cch, 1);
3145	else
3146	rcExit = vbcppError(pThis, "output error");
3147	}
3148	else if ( rcExit == RTEXITCODE_SUCCESS
3149	&& pThis->enmMode == kVBCppMode_SelectiveD)
3150	rcExit = vbcppMacroTryConvertToInlineD(pThis, vbcppMacroLookup(pThis, pchDefine, cchDefine));
3151	else
3152	pThis->fJustDroppedLine = true;
3153	}
3154	}
3155	}
3156	return rcExit;
3157	}
3158
3159
3160	/**
3161	* Processes a abbreviated line number directive.
3162	*
3163	* @returns RTEXITCODE_SUCCESS or RTEXITCODE_FAILURE+msg.
3164	* @param pThis The C preprocessor instance.
3165	* @param pStrmInput The input stream.
3166	* @param offStart The stream position where the directive
3167	* started (for pass thru).
3168	*/
3169	static RTEXITCODE vbcppDirectiveUndef(PVBCPP pThis, PSCMSTREAM pStrmInput, size_t offStart)
3170	{
3171	RT_NOREF_PV(offStart);
3172
3173	/*
3174	* Parse it.
3175	*/
3176	RTEXITCODE rcExit = vbcppProcessSkipWhiteEscapedEolAndComments(pThis, pStrmInput);
3177	if (rcExit == RTEXITCODE_SUCCESS)
3178	{
3179	size_t cchDefine;
3180	const char *pchDefine = ScmStreamCGetWord(pStrmInput, &cchDefine);
3181	if (pchDefine)
3182	{
3183	size_t offMaybeComment = vbcppProcessSkipWhite(pStrmInput);
3184	rcExit = vbcppProcessSkipWhiteEscapedEolAndCommentsCheckEol(pThis, pStrmInput);
3185	if (rcExit == RTEXITCODE_SUCCESS)
3186	{
3187	/*
3188	* Take action.
3189	*/
3190	PVBCPPMACRO pMacro = vbcppMacroLookup(pThis, pchDefine, cchDefine);
3191	if ( pMacro
3192	&& pThis->fRespectSourceDefines
3193	&& ( !pMacro->fCmdLine
3194	\|\| pThis->fAllowRedefiningCmdLineDefines ) )
3195	{
3196	RTStrSpaceRemove(&pThis->StrSpace, pMacro->Core.pszString);
3197	vbcppMacroFree(&pMacro->Core, NULL);
3198	}
3199
3200	/*
3201	* Pass thru.
3202	*/
3203	if (pThis->fPassThruDefines)
3204	{
3205	unsigned cchIndent = pThis->pCondStack ? pThis->pCondStack->iKeepLevel : 0;
3206	ssize_t cch = ScmStreamPrintf(&pThis->StrmOutput, "#%sundef %.s",
3207	cchIndent, "", cchDefine, pchDefine);
3208	if (cch > 0)
3209	vbcppOutputComment(pThis, pStrmInput, offMaybeComment, cch, 1);
3210	else
3211	rcExit = vbcppError(pThis, "output error");
3212	}
3213
3214	}
3215	}
3216	else
3217	rcExit = vbcppError(pThis, "Malformed #ifndef");
3218	}
3219	return rcExit;
3220
3221	}
3222
3223
3224
3225
3226
3227	/*
3228	*
3229	*
3230	* C O N D I T I O N A L S
3231	* C O N D I T I O N A L S
3232	* C O N D I T I O N A L S
3233	* C O N D I T I O N A L S
3234	* C O N D I T I O N A L S
3235	*
3236	*
3237	*/
3238
3239
3240	/**
3241	* Combines current stack result with the one being pushed.
3242	*
3243	* @returns Combined result.
3244	* @param enmEvalPush The result of the condition being pushed.
3245	* @param enmEvalStack The current stack result.
3246	*/
3247	static VBCPPEVAL vbcppCondCombine(VBCPPEVAL enmEvalPush, VBCPPEVAL enmEvalStack)
3248	{
3249	if (enmEvalStack == kVBCppEval_False)
3250	return kVBCppEval_False;
3251	return enmEvalPush;
3252	}
3253
3254
3255	/**
3256	* Pushes an conditional onto the stack.
3257	*
3258	* @returns RTEXITCODE_SUCCESS or RTEXITCODE_FAILURE+msg.
3259	* @param pThis The C preprocessor instance.
3260	* @param pStrmInput The current input stream.
3261	* @param offStart Not currently used, using @a pchCondition and
3262	* @a cchCondition instead.
3263	* @param enmKind The kind of conditional.
3264	* @param enmResult The result of the evaluation.
3265	* @param pchCondition The raw condition.
3266	* @param cchCondition The length of @a pchCondition.
3267	*/
3268	static RTEXITCODE vbcppCondPush(PVBCPP pThis, PSCMSTREAM pStrmInput, size_t offStart,
3269	VBCPPCONDKIND enmKind, VBCPPEVAL enmResult,
3270	const char *pchCondition, size_t cchCondition)
3271	{
3272	RT_NOREF_PV(offStart); RT_NOREF_PV(pStrmInput);
3273
3274
3275	if (pThis->cCondStackDepth >= _64K)
3276	return vbcppError(pThis, "Too many nested #if/#ifdef/#ifndef statements");
3277
3278	/*
3279	* Allocate a new entry and push it.
3280	*/
3281	PVBCPPCOND pCond = (PVBCPPCOND)RTMemAlloc(sizeof(*pCond));
3282	if (!pCond)
3283	return vbcppError(pThis, "out of memory");
3284
3285	PVBCPPCOND pUp = pThis->pCondStack;
3286	pCond->enmKind = enmKind;
3287	pCond->enmResult = enmResult;
3288	pCond->enmStackResult = pUp ? vbcppCondCombine(enmResult, pUp->enmStackResult) : enmResult;
3289	pCond->fSeenElse = false;
3290	pCond->fElIfDecided = enmResult == kVBCppEval_True;
3291	pCond->iLevel = pThis->cCondStackDepth;
3292	pCond->iKeepLevel = (pUp ? pUp->iKeepLevel : 0) + (enmResult == kVBCppEval_Undecided);
3293	pCond->pchCond = pchCondition;
3294	pCond->cchCond = cchCondition;
3295
3296	pCond->pUp = pThis->pCondStack;
3297	pThis->pCondStack = pCond;
3298	pThis->fIf0Mode = pCond->enmStackResult == kVBCppEval_False;
3299
3300	/*
3301	* Do pass thru.
3302	*/
3303	if ( !pThis->fIf0Mode
3304	&& enmResult == kVBCppEval_Undecided)
3305	{
3306	/** @todo this is stripping comments of \#ifdef and \#ifndef atm. */
3307	const char *pszDirective;
3308	switch (enmKind)
3309	{
3310	case kVBCppCondKind_If: pszDirective = "if"; break;
3311	case kVBCppCondKind_IfDef: pszDirective = "ifdef"; break;
3312	case kVBCppCondKind_IfNDef: pszDirective = "ifndef"; break;
3313	case kVBCppCondKind_ElIf: pszDirective = "elif"; break;
3314	default: AssertFailedReturn(RTEXITCODE_FAILURE);
3315	}
3316	ssize_t cch = ScmStreamPrintf(&pThis->StrmOutput, "#%s%s %.s",
3317	pCond->iKeepLevel - 1, "", pszDirective, cchCondition, pchCondition);
3318	if (cch < 0)
3319	return vbcppError(pThis, "Output error %Rrc", (int)cch);
3320	}
3321	else
3322	pThis->fJustDroppedLine = true;
3323
3324	return RTEXITCODE_SUCCESS;
3325	}
3326
3327
3328	/**
3329	* Recursively destroys the expression tree.
3330	*
3331	* @param pExpr The root of the expression tree to destroy.
3332	*/
3333	static void vbcppExprDestoryTree(PVBCPPEXPR pExpr)
3334	{
3335	if (!pExpr)
3336	return;
3337
3338	switch (pExpr->enmKind)
3339	{
3340	case kVBCppExprKind_Unary:
3341	vbcppExprDestoryTree(pExpr->u.Unary.pArg);
3342	break;
3343	case kVBCppExprKind_Binary:
3344	vbcppExprDestoryTree(pExpr->u.Binary.pLeft);
3345	vbcppExprDestoryTree(pExpr->u.Binary.pRight);
3346	break;
3347	case kVBCppExprKind_Ternary:
3348	vbcppExprDestoryTree(pExpr->u.Ternary.pExpr);
3349	vbcppExprDestoryTree(pExpr->u.Ternary.pTrue);
3350	vbcppExprDestoryTree(pExpr->u.Ternary.pFalse);
3351	break;
3352	case kVBCppExprKind_SignedValue:
3353	case kVBCppExprKind_UnsignedValue:
3354	break;
3355	case kVBCppExprKind_UndefMacroCall:
3356	pExpr->u.UndefMacroCall.pszName = NULL;
3357	for (size_t i = 0; i < pExpr->u.UndefMacroCall.cArgs; i++)
3358	vbcppExprDestoryTree(pExpr->u.UndefMacroCall.papArgs[i]);
3359	RTMemFree(pExpr->u.UndefMacroCall.papArgs);
3360	RTMemFree(pExpr->u.UndefMacroCall.pszName);
3361	break;
3362	default:
3363	AssertFailed();
3364	return;
3365	}
3366	RTMemFree(pExpr);
3367	}
3368
3369
3370	/**
3371	* Report error during expression parsing.
3372	*
3373	* @returns kExprRet_Error
3374	* @param pParser The parser instance.
3375	* @param pszMsg The error message.
3376	* @param ... Format arguments.
3377	*/
3378	static VBCPPEXPRRET vbcppExprParseError(PVBCPPEXPRPARSER pParser, const char *pszMsg, ...)
3379	{
3380	va_list va;
3381	va_start(va, pszMsg);
3382	vbcppErrorV(pParser->pThis, pszMsg, va);
3383	va_end(va);
3384	return kExprRet_Error;
3385	}
3386
3387
3388	/**
3389	* Skip white space.
3390	*
3391	* @param pParser The parser instance.
3392	*/
3393	static void vbcppExprParseSkipWhiteSpace(PVBCPPEXPRPARSER pParser)
3394	{
3395	while (RT_C_IS_SPACE(*pParser->pszCur))
3396	pParser->pszCur++;
3397	}
3398
3399
3400	/**
3401	* Allocate a new
3402	*
3403	* @returns Pointer to the node. NULL+msg on failure.
3404	* @param pParser The parser instance.
3405	*/
3406	static PVBCPPEXPR vbcppExprParseAllocNode(PVBCPPEXPRPARSER pParser)
3407	{
3408	PVBCPPEXPR pExpr = (PVBCPPEXPR)RTMemAllocZ(sizeof(*pExpr));
3409	if (!pExpr)
3410	vbcppExprParseError(pParser, "out of memory (expression node)");
3411	return pExpr;
3412	}
3413
3414
3415	/**
3416	* Checks if we're currently in an call to an undefined macro.
3417	*
3418	* This will walk up the expression chain and check for a call node while also
3419	* taking parenthesis nodes into account.
3420	*
3421	* @returns true if we are, false if we aren't.
3422	* @param pParser The parser instance.
3423	*/
3424	static bool vbcppExprParseIsInUndefCall(PVBCPPEXPRPARSER pParser)
3425	{
3426	PVBCPPEXPR pExpr = pParser->pCur;
3427	while (pExpr)
3428	{
3429	if (pExpr->enmKind == kVBCppExprKind_UndefMacroCall)
3430	return true;
3431	if ( pExpr->enmKind == kVBCppExprKind_Unary
3432	&& pExpr->u.Unary.enmOperator == kVBCppUnaryOp_Parenthesis)
3433	break;
3434	pExpr = pExpr->pParent;
3435	}
3436	return false;
3437	}
3438
3439
3440	/**
3441	* Looks for right parentheses, comma and/or end of expression.
3442	*
3443	* (The comma is only if we're in the context of a undefined macro call.)
3444	*
3445	* @returns Expression status.
3446	* @retval kExprRet_Ok
3447	* @retval kExprRet_Error with msg.
3448	* @retval kExprRet_EndOfExpr
3449	* @param pParser The parser instance.
3450	*/
3451	static VBCPPEXPRRET vbcppExprParseMaybeRParenOrEoe(PVBCPPEXPRPARSER pParser)
3452	{
3453	Assert(!pParser->ppCur);
3454	for (;;)
3455	{
3456	vbcppExprParseSkipWhiteSpace(pParser);
3457	char const ch = *pParser->pszCur;
3458	if (ch == '\0')
3459	{
3460	/* Unwind making sure we don't have any incomplete parentheses or
3461	incomplete call expressions on the stack. */
3462	PVBCPPEXPR pCur = pParser->pCur;
3463	Assert(pCur);
3464	for (;;)
3465	{
3466	if (!pCur->fComplete)
3467	{
3468	if ( pCur->enmKind == kVBCppExprKind_Unary
3469	&& pCur->u.Unary.enmOperator == kVBCppUnaryOp_Parenthesis)
3470	return vbcppExprParseError(pParser, "Missing right parenthesis");
3471	if (pCur->enmKind == kVBCppExprKind_UndefMacroCall)
3472	return vbcppExprParseError(pParser, "Missing right parenthesis for undefined macro call");
3473	}
3474	if (pCur->pParent)
3475	pCur = pCur->pParent;
3476	else
3477	{
3478	pParser->pCur = pCur;
3479	pParser->ppCur = NULL;
3480	return kExprRet_EndOfExpr;
3481	}
3482	}
3483	}
3484
3485	if (ch != ')' && (ch != ',' \|\| !vbcppExprParseIsInUndefCall(pParser))) /** @todo just immediate? */
3486	break;
3487	pParser->pszCur++;
3488
3489	PVBCPPEXPR pCur = pParser->pCur;
3490	while ( pCur
3491	&& ( pCur->enmKind != kVBCppExprKind_UndefMacroCall
3492	\|\| pCur->fComplete /?/)
3493	&& ( pCur->enmKind != kVBCppExprKind_Unary
3494	\|\| pCur->u.Unary.enmOperator != kVBCppUnaryOp_Parenthesis
3495	\|\| pCur->fComplete))
3496	{
3497	switch (pCur->enmKind)
3498	{
3499	case kVBCppExprKind_SignedValue:
3500	case kVBCppExprKind_UnsignedValue:
3501	Assert(pCur->fComplete);
3502	break;
3503	case kVBCppExprKind_Unary:
3504	AssertReturn(pCur->u.Unary.pArg, vbcppExprParseError(pParser, "internal error"));
3505	pCur->fComplete = true;
3506	break;
3507	case kVBCppExprKind_Binary:
3508	AssertReturn(pCur->u.Binary.pLeft, vbcppExprParseError(pParser, "internal error"));
3509	AssertReturn(pCur->u.Binary.pRight, vbcppExprParseError(pParser, "internal error"));
3510	pCur->fComplete = true;
3511	break;
3512	case kVBCppExprKind_Ternary:
3513	#if 1 /** @todo Check out the ternary operator implementation. */
3514	return vbcppExprParseError(pParser, "The ternary operator is not implemented");
3515	#else
3516	Assert(pCur->u.Ternary.pExpr);
3517	if (!pCur->u.Ternary.pTrue)
3518	return vbcppExprParseError(pParser, "?!?!?");
3519	if (!pCur->u.Ternary.pFalse)
3520	return vbcppExprParseError(pParser, "?!?!?!?");
3521	pCur->fComplete = true;
3522	#endif
3523	break;
3524	case kVBCppExprKind_UndefMacroCall:
3525	break;
3526	default:
3527	return vbcppExprParseError(pParser, "Internal error (enmKind=%d)", pCur->enmKind);
3528	}
3529	pCur = pCur->pParent;
3530	}
3531	if (!pCur)
3532	return vbcppExprParseError(pParser, "Right parenthesis without a left one");
3533
3534	/*
3535	* If we got down to an undefined macro call, we make it the current
3536	* parser expression and return EndOfExpr. The call expression is
3537	* completed if we hit a ')'.
3538	*/
3539	if (pCur->enmKind == kVBCppExprKind_UndefMacroCall)
3540	{
3541	pCur->fComplete = ch == ')';
3542	pParser->pCur = pCur;
3543	pParser->ppCur = NULL;
3544	return kExprRet_EndOfExpr;
3545	}
3546
3547	/*
3548	* Complete the parenthesis expression and make it current.
3549	*/
3550	Assert( pCur->enmKind == kVBCppExprKind_Unary
3551	&& pCur->u.Unary.enmOperator == kVBCppUnaryOp_Parenthesis);
3552	AssertReturn(pCur->u.Unary.pArg, vbcppExprParseError(pParser, "internal error"));
3553	pCur->fComplete = true;
3554	pParser->pCur = pCur;
3555	pParser->ppCur = NULL;
3556	}
3557
3558	return kExprRet_Ok;
3559	}
3560
3561
3562	/**
3563	* Parses an binary operator.
3564	*
3565	* @returns Expression status.
3566	* @retval kExprRet_Ok
3567	* @retval kExprRet_Error with msg.
3568	* @param pParser The parser instance.
3569	*/
3570	static VBCPPEXPRRET vbcppExprParseBinaryOperator(PVBCPPEXPRPARSER pParser)
3571	{
3572	/*
3573	* Binary or ternary operator should follow now.
3574	*/
3575	VBCPPBINARYOP enmOp;
3576	char ch = *pParser->pszCur;
3577	switch (ch)
3578	{
3579	case '*':
3580	if (pParser->pszCur[1] == '=')
3581	return vbcppExprParseError(pParser, "The assignment by product operator is not valid in a preprocessor expression");
3582	enmOp = kVBCppBinary_Multiplication;
3583	break;
3584	case '/':
3585	if (pParser->pszCur[1] == '=')
3586	return vbcppExprParseError(pParser, "The assignment by quotient operator is not valid in a preprocessor expression");
3587	enmOp = kVBCppBinary_Division;
3588	break;
3589	case '%':
3590	if (pParser->pszCur[1] == '=')
3591	return vbcppExprParseError(pParser, "The assignment by remainder operator is not valid in a preprocessor expression");
3592	enmOp = kVBCppBinary_Modulo;
3593	break;
3594	case '+':
3595	if (pParser->pszCur[1] == '=')
3596	return vbcppExprParseError(pParser, "The assignment by sum operator is not valid in a preprocessor expression");
3597	enmOp = kVBCppBinary_Addition;
3598	break;
3599	case '-':
3600	if (pParser->pszCur[1] == '=')
3601	return vbcppExprParseError(pParser, "The assignment by difference operator is not valid in a preprocessor expression");
3602	enmOp = kVBCppBinary_Subtraction;
3603	break;
3604	case '<':
3605	enmOp = kVBCppBinary_LessThan;
3606	if (pParser->pszCur[1] == '=')
3607	{
3608	pParser->pszCur++;
3609	enmOp = kVBCppBinary_LessThanOrEqual;
3610	}
3611	else if (pParser->pszCur[1] == '<')
3612	{
3613	pParser->pszCur++;
3614	if (pParser->pszCur[1] == '=')
3615	return vbcppExprParseError(pParser, "The assignment by bitwise left shift operator is not valid in a preprocessor expression");
3616	enmOp = kVBCppBinary_LeftShift;
3617	}
3618	break;
3619	case '>':
3620	enmOp = kVBCppBinary_GreaterThan;
3621	if (pParser->pszCur[1] == '=')
3622	{
3623	pParser->pszCur++;
3624	enmOp = kVBCppBinary_GreaterThanOrEqual;
3625	}
3626	else if (pParser->pszCur[1] == '<')
3627	{
3628	pParser->pszCur++;
3629	if (pParser->pszCur[1] == '=')
3630	return vbcppExprParseError(pParser, "The assignment by bitwise right shift operator is not valid in a preprocessor expression");
3631	enmOp = kVBCppBinary_LeftShift;
3632	}
3633	break;
3634	case '=':
3635	if (pParser->pszCur[1] != '=')
3636	return vbcppExprParseError(pParser, "The assignment operator is not valid in a preprocessor expression");
3637	pParser->pszCur++;
3638	enmOp = kVBCppBinary_EqualTo;
3639	break;
3640
3641	case '!':
3642	if (pParser->pszCur[1] != '=')
3643	return vbcppExprParseError(pParser, "Expected binary operator, found the unary operator logical NOT");
3644	pParser->pszCur++;
3645	enmOp = kVBCppBinary_NotEqualTo;
3646	break;
3647
3648	case '&':
3649	if (pParser->pszCur[1] == '=')
3650	return vbcppExprParseError(pParser, "The assignment by bitwise AND operator is not valid in a preprocessor expression");
3651	if (pParser->pszCur[1] == '&')
3652	{
3653	pParser->pszCur++;
3654	enmOp = kVBCppBinary_LogicalAnd;
3655	}
3656	else
3657	enmOp = kVBCppBinary_BitwiseAnd;
3658	break;
3659	case '^':
3660	if (pParser->pszCur[1] == '=')
3661	return vbcppExprParseError(pParser, "The assignment by bitwise XOR operator is not valid in a preprocessor expression");
3662	enmOp = kVBCppBinary_BitwiseXor;
3663	break;
3664	case '\|':
3665	if (pParser->pszCur[1] == '=')
3666	return vbcppExprParseError(pParser, "The assignment by bitwise AND operator is not valid in a preprocessor expression");
3667	if (pParser->pszCur[1] == '\|')
3668	{
3669	pParser->pszCur++;
3670	enmOp = kVBCppBinary_LogicalOr;
3671	}
3672	else
3673	enmOp = kVBCppBinary_BitwiseOr;
3674	break;
3675	case '~':
3676	return vbcppExprParseError(pParser, "Expected binary operator, found the unary operator bitwise NOT");
3677
3678	case ':':
3679	case '?':
3680	return vbcppExprParseError(pParser, "The ternary operator is not yet implemented");
3681
3682	default:
3683	return vbcppExprParseError(pParser, "Expected binary operator, found '%.20s'", pParser->pszCur);
3684	}
3685	pParser->pszCur++;
3686
3687	/*
3688	* Create a binary operator node.
3689	*/
3690	PVBCPPEXPR pExpr = vbcppExprParseAllocNode(pParser);
3691	if (!pExpr)
3692	return kExprRet_Error;
3693	pExpr->fComplete = true;
3694	pExpr->enmKind = kVBCppExprKind_Binary;
3695	pExpr->u.Binary.enmOperator = enmOp;
3696	pExpr->u.Binary.pLeft = NULL;
3697	pExpr->u.Binary.pRight = NULL;
3698
3699	/*
3700	* Back up the tree until we find our spot.
3701	*/
3702	PVBCPPEXPR *ppPlace = NULL;
3703	PVBCPPEXPR pChild = pParser->pCur;
3704	PVBCPPEXPR pParent = pChild->pParent;
3705	while (pParent)
3706	{
3707	if (pParent->enmKind == kVBCppExprKind_Unary)
3708	{
3709	if (pParent->u.Unary.enmOperator == kVBCppUnaryOp_Parenthesis)
3710	{
3711	ppPlace = &pParent->u.Unary.pArg;
3712	break;
3713	}
3714	AssertReturn(pParent->u.Unary.pArg, vbcppExprParseError(pParser, "internal error"));
3715	pParent->fComplete = true;
3716	}
3717	else if (pParent->enmKind == kVBCppExprKind_Binary)
3718	{
3719	AssertReturn(pParent->u.Binary.pLeft, vbcppExprParseError(pParser, "internal error"));
3720	AssertReturn(pParent->u.Binary.pRight, vbcppExprParseError(pParser, "internal error"));
3721	if ((pParent->u.Binary.enmOperator & VBCPPOP_PRECEDENCE_MASK) >= (enmOp & VBCPPOP_PRECEDENCE_MASK))
3722	{
3723	AssertReturn(pChild, vbcppExprParseError(pParser, "internal error"));
3724
3725	if (pParent->u.Binary.pRight == pChild)
3726	ppPlace = &pParent->u.Binary.pRight;
3727	else
3728	ppPlace = &pParent->u.Binary.pLeft;
3729	AssertReturn(*ppPlace == pChild, vbcppExprParseError(pParser, "internal error"));
3730	break;
3731	}
3732	pParent->fComplete = true;
3733	}
3734	else if (pParent->enmKind == kVBCppExprKind_Ternary)
3735	{
3736	return vbcppExprParseError(pParser, "The ternary operator is not implemented");
3737	}
3738	else if (pParent->enmKind == kVBCppExprKind_UndefMacroCall)
3739	{
3740	ppPlace = &pParent->u.UndefMacroCall.papArgs[pParent->u.UndefMacroCall.cArgs];
3741	break;
3742	}
3743	else
3744	AssertReturn( pParent->enmKind == kVBCppExprKind_SignedValue
3745	\|\| pParent->enmKind == kVBCppExprKind_UnsignedValue,
3746	vbcppExprParseError(pParser, "internal error"));
3747
3748	/* Up on level */
3749	pChild = pParent;
3750	pParent = pParent->pParent;
3751	}
3752
3753	/*
3754	* Do the rotation.
3755	*/
3756	Assert(pChild);
3757	Assert(pChild->pParent == pParent);
3758	pChild->pParent = pExpr;
3759
3760	pExpr->u.Binary.pLeft = pChild;
3761	pExpr->pParent = pParent;
3762
3763	if (!pParent)
3764	pParser->pRoot = pExpr;
3765	else
3766	*ppPlace = pExpr;
3767
3768	pParser->ppCur = &pExpr->u.Binary.pRight;
3769	pParser->pCur = pExpr;
3770
3771	return kExprRet_Ok;
3772	}
3773
3774
3775	/**
3776	* Deals with right paretheses or/and end of expression, looks for binary
3777	* operators.
3778	*
3779	* @returns Expression status.
3780	* @retval kExprRet_Ok if binary operator was found processed.
3781	* @retval kExprRet_Error with msg.
3782	* @retval kExprRet_EndOfExpr
3783	* @param pParser The parser instance.
3784	*/
3785	static VBCPPEXPRRET vbcppExprParseBinaryOrEoeOrRparen(PVBCPPEXPRPARSER pParser)
3786	{
3787	VBCPPEXPRRET enmRet = vbcppExprParseMaybeRParenOrEoe(pParser);
3788	if (enmRet != kExprRet_Ok)
3789	return enmRet;
3790	return vbcppExprParseBinaryOperator(pParser);
3791	}
3792
3793
3794	/**
3795	* Worker for vbcppExprParseIdentifier that parses a call to an undefined macro
3796	* in selective mode.
3797	*
3798	* @returns Expression status.
3799	* @retval kExprRet_Ok if binary operator was found processed.
3800	* @retval kExprRet_Error with msg.
3801	* @retval kExprRet_EndOfExpr
3802	* @param pParser The parser instance.
3803	* @param pszMacro The start of the macro name.
3804	* @param cchMacro The length of the macro name.
3805	*/
3806	static VBCPPEXPRRET vbcppExprParseUndefMacroCall(PVBCPPEXPRPARSER pParser, const char *pszMacro, size_t cchMacro)
3807	{
3808	/*
3809	* Treat it as a call to an undefined macro function.
3810	*/
3811	/* Create a node. */
3812	PVBCPPEXPR const pExpr = vbcppExprParseAllocNode(pParser);
3813	if (!pExpr)
3814	return kExprRet_Error;
3815	pExpr->enmKind = kVBCppExprKind_UndefMacroCall;
3816	pExpr->fComplete = false;
3817	pExpr->u.UndefMacroCall.cArgs = 0;
3818	pExpr->u.UndefMacroCall.papArgs = NULL;
3819	pExpr->u.UndefMacroCall.pszName = RTStrDupN(pszMacro, cchMacro);
3820	AssertReturn(pExpr->u.UndefMacroCall.pszName, vbcppExprParseError(pParser, "out of memory"));
3821
3822	/* Link it. */
3823	pExpr->pParent = pParser->pCur;
3824	pParser->pCur = pExpr;
3825	*pParser->ppCur = pExpr;
3826	pParser->ppCur = NULL;
3827
3828	/*
3829	* Parse the argument list.
3830	*/
3831	pParser->pszCur++;
3832	for (size_t iArg = 0 ; ; iArg++)
3833	{
3834	/*
3835	* Prepare the next argument expression pointer.
3836	*/
3837	if (!(iArg % 16))
3838	{
3839	void *pvNew = RTMemRealloc(pExpr->u.UndefMacroCall.papArgs,
3840	sizeof(pExpr->u.UndefMacroCall.papArgs[0]) * (iArg + 16));
3841	AssertPtrReturn(pvNew, vbcppExprParseError(pParser, "out of memory"));
3842	pExpr->u.UndefMacroCall.papArgs = (PVBCPPEXPR *)pvNew;
3843	}
3844	pExpr->u.UndefMacroCall.papArgs[iArg] = NULL;
3845	pParser->ppCur = &pExpr->u.UndefMacroCall.papArgs[iArg];
3846
3847	/*
3848	* Do the parsing.
3849	*/
3850	for (;;)
3851	{
3852	/*
3853	* Eat unary operators until we hit a value or end of argument/call.
3854	*/
3855	VBCPPEXPRRET enmRet;
3856	do
3857	enmRet = vbcppExprParseUnaryOrValue(pParser);
3858	while (enmRet == kExprRet_UnaryOperator);
3859	if (enmRet == kExprRet_EndOfExpr)
3860	break;
3861	if (enmRet == kExprRet_Error)
3862	return enmRet;
3863	AssertReturn(enmRet == kExprRet_Value, vbcppExprParseError(pParser, "Expected value (enmRet=%d)", enmRet));
3864
3865	/*
3866	* Non-unary operator, right parenthesis or end of argument/call is up next.
3867	*/
3868	enmRet = vbcppExprParseBinaryOrEoeOrRparen(pParser);
3869	if (enmRet == kExprRet_EndOfExpr)
3870	break;
3871	if (enmRet == kExprRet_Error)
3872	return enmRet;
3873	AssertReturn(enmRet == kExprRet_Ok, vbcppExprParseError(pParser, "Expected value (enmRet=%d)", enmRet));
3874	}
3875
3876	/*
3877	* Append the argument and skip past the comma or right parenthesis.
3878	*/
3879	if (pExpr->u.UndefMacroCall.papArgs[iArg] != NULL \|\| !pExpr->fComplete)
3880	pExpr->u.UndefMacroCall.cArgs = iArg + 1;
3881
3882	Assert(pParser->pCur == pExpr);
3883	if (pExpr->fComplete)
3884	break;
3885	}
3886
3887	pParser->ppCur = NULL;
3888	return kExprRet_Value;
3889	}
3890
3891
3892	/**
3893	* Parses an identifier in the expression, replacing it by 0.
3894	*
3895	* All known identifiers has already been replaced by their macro values, so
3896	* what's left are unknown macros. These are replaced by 0.
3897	*
3898	* @returns Expression status.
3899	* @retval kExprRet_Value
3900	* @retval kExprRet_Error with msg.
3901	* @param pParser The parser instance.
3902	*/
3903	static VBCPPEXPRRET vbcppExprParseIdentifier(PVBCPPEXPRPARSER pParser)
3904	{
3905	/** @todo don't increment if it's an actively undefined macro. Need to revise
3906	* the expression related code wrt selective preprocessing. */
3907	pParser->cUndefined++;
3908
3909	/* Find the end. */
3910	const char *pszMacro = pParser->pszCur;
3911	const char *pszNext = pszMacro + 1;
3912	while (vbcppIsCIdentifierChar(*pszNext))
3913	pszNext++;
3914	size_t const cchMacro = pszNext - pszMacro;
3915
3916	/* Skip spaces and check for parenthesis. */
3917	pParser->pszCur = pszNext;
3918	vbcppExprParseSkipWhiteSpace(pParser);
3919	if (*pParser->pszCur == '(')
3920	{
3921	if (pParser->pThis->enmMode == kVBCppMode_Selective)
3922	return vbcppExprParseUndefMacroCall(pParser, pszMacro, cchMacro);
3923	return vbcppExprParseError(pParser, "%sUnknown unary operator '%.*s'",
3924	pParser->pThis->enmMode != kVBCppMode_Standard ? "TODO selective: " : "",
3925	cchMacro, pszMacro);
3926	}
3927
3928	/* Create a signed value node. */
3929	PVBCPPEXPR pExpr = vbcppExprParseAllocNode(pParser);
3930	if (!pExpr)
3931	return kExprRet_Error;
3932	pExpr->fComplete = true;
3933	pExpr->enmKind = kVBCppExprKind_UnsignedValue;
3934	pExpr->u.UnsignedValue.u64 = 0;
3935
3936	/* Link it. */
3937	pExpr->pParent = pParser->pCur;
3938	pParser->pCur = pExpr;
3939	*pParser->ppCur = pExpr;
3940	pParser->ppCur = NULL;
3941
3942	return kExprRet_Value;
3943	}
3944
3945
3946	/**
3947	* Parses an numeric constant in the expression.
3948	*
3949	* @returns Expression status.
3950	* @retval kExprRet_Value
3951	* @retval kExprRet_Error with msg.
3952	* @param pParser The parser instance.
3953	*/
3954	static VBCPPEXPRRET vbcppExprParseNumber(PVBCPPEXPRPARSER pParser)
3955	{
3956	bool fSigned;
3957	char *pszNext;
3958	uint64_t u64;
3959	char ch = *pParser->pszCur++;
3960	char ch2 = *pParser->pszCur;
3961	if ( ch == '0'
3962	&& (ch2 == 'x' \|\| ch2 == 'X'))
3963	{
3964	ch2 = *++pParser->pszCur;
3965	if (!RT_C_IS_XDIGIT(ch2))
3966	return vbcppExprParseError(pParser, "Expected hex digit following '0x'");
3967	int rc = RTStrToUInt64Ex(pParser->pszCur, &pszNext, 16, &u64);
3968	if ( RT_FAILURE(rc)
3969	\|\| rc == VWRN_NUMBER_TOO_BIG)
3970	return vbcppExprParseError(pParser, "Invalid hex value '%.20s...' (%Rrc)", pParser->pszCur, rc);
3971	fSigned = false;
3972	}
3973	else if (ch == '0')
3974	{
3975	int rc = RTStrToUInt64Ex(pParser->pszCur - 1, &pszNext, 8, &u64);
3976	if ( RT_FAILURE(rc)
3977	\|\| rc == VWRN_NUMBER_TOO_BIG)
3978	return vbcppExprParseError(pParser, "Invalid octal value '%.20s...' (%Rrc)", pParser->pszCur, rc);
3979	fSigned = u64 > (uint64_t)INT64_MAX ? false : true;
3980	}
3981	else
3982	{
3983	int rc = RTStrToUInt64Ex(pParser->pszCur - 1, &pszNext, 10, &u64);
3984	if ( RT_FAILURE(rc)
3985	\|\| rc == VWRN_NUMBER_TOO_BIG)
3986	return vbcppExprParseError(pParser, "Invalid decimal value '%.20s...' (%Rrc)", pParser->pszCur, rc);
3987	fSigned = u64 > (uint64_t)INT64_MAX ? false : true;
3988	}
3989
3990	/* suffix. */
3991	if (vbcppIsCIdentifierLeadChar(*pszNext))
3992	{
3993	size_t cchSuffix = 1;
3994	while (vbcppIsCIdentifierLeadChar(pszNext[cchSuffix]))
3995	cchSuffix++;
3996
3997	if (cchSuffix == 1 && (pszNext == 'u' \|\| pszNext == 'U'))
3998	fSigned = false;
3999	else if ( cchSuffix == 1
4000	&& (pszNext == 'l' \|\| pszNext == 'L'))
4001	fSigned = true;
4002	else if ( cchSuffix == 2
4003	&& (!strncmp(pszNext, "ul", 2) \|\| !strncmp(pszNext, "UL", 2)))
4004	fSigned = false;
4005	else if ( cchSuffix == 2
4006	&& (!strncmp(pszNext, "ll", 2) \|\| !strncmp(pszNext, "LL", 2)))
4007	fSigned = true;
4008	else if ( cchSuffix == 3
4009	&& (!strncmp(pszNext, "ull", 3) \|\| !strncmp(pszNext, "ULL", 3)))
4010	fSigned = false;
4011	else
4012	return vbcppExprParseError(pParser, "Invalid number suffix '%.*s'", cchSuffix, pszNext);
4013
4014	pszNext += cchSuffix;
4015	}
4016	pParser->pszCur = pszNext;
4017
4018	/* Create a signed value node. */
4019	PVBCPPEXPR pExpr = vbcppExprParseAllocNode(pParser);
4020	if (!pExpr)
4021	return kExprRet_Error;
4022	pExpr->fComplete = true;
4023	if (fSigned)
4024	{
4025	pExpr->enmKind = kVBCppExprKind_SignedValue;
4026	pExpr->u.SignedValue.s64 = (int64_t)u64;
4027	}
4028	else
4029	{
4030	pExpr->enmKind = kVBCppExprKind_UnsignedValue;
4031	pExpr->u.UnsignedValue.u64 = u64;
4032	}
4033
4034	/* Link it. */
4035	pExpr->pParent = pParser->pCur;
4036	pParser->pCur = pExpr;
4037	*pParser->ppCur = pExpr;
4038	pParser->ppCur = NULL;
4039
4040	return kExprRet_Value;
4041	}
4042
4043
4044	/**
4045	* Parses an character constant in the expression.
4046	*
4047	* @returns Expression status.
4048	* @retval kExprRet_Value
4049	* @retval kExprRet_Error with msg.
4050	* @param pParser The parser instance.
4051	*/
4052	static VBCPPEXPRRET vbcppExprParseCharacterConstant(PVBCPPEXPRPARSER pParser)
4053	{
4054	Assert(*pParser->pszCur == '\'');
4055	pParser->pszCur++;
4056	char ch2 = *pParser->pszCur++;
4057	if (ch2 == '\'')
4058	return vbcppExprParseError(pParser, "Empty character constant");
4059	int64_t s64;
4060	if (ch2 == '\\')
4061	{
4062	ch2 = *pParser->pszCur++;
4063	switch (ch2)
4064	{
4065	case '0': s64 = 0x00; break;
4066	case 'n': s64 = 0x0d; break;
4067	case 'r': s64 = 0x0a; break;
4068	case 't': s64 = 0x09; break;
4069	default:
4070	return vbcppExprParseError(pParser, "Escape character '%c' is not implemented", ch2);
4071	}
4072	}
4073	else
4074	s64 = ch2;
4075	if (*pParser->pszCur != '\'')
4076	return vbcppExprParseError(pParser, "Character constant contains more than one character");
4077
4078	/* Create a signed value node. */
4079	PVBCPPEXPR pExpr = vbcppExprParseAllocNode(pParser);
4080	if (!pExpr)
4081	return kExprRet_Error;
4082	pExpr->fComplete = true;
4083	pExpr->enmKind = kVBCppExprKind_SignedValue;
4084	pExpr->u.SignedValue.s64 = s64;
4085
4086	/* Link it. */
4087	pExpr->pParent = pParser->pCur;
4088	pParser->pCur = pExpr;
4089	*pParser->ppCur = pExpr;
4090	pParser->ppCur = NULL;
4091
4092	return kExprRet_Value;
4093	}
4094
4095
4096	/**
4097	* Parses a unary operator or a value.
4098	*
4099	* @returns Expression status.
4100	* @retval kExprRet_Value if value was found and processed.
4101	* @retval kExprRet_UnaryOperator if an unary operator was found and processed.
4102	* @retval kExprRet_Error with msg.
4103	* @retval kExprRet_EndOfExpr if reached ',' or ')' if in an undefined call.
4104	* @param pParser The parser instance.
4105	*/
4106	static VBCPPEXPRRET vbcppExprParseUnaryOrValue(PVBCPPEXPRPARSER pParser)
4107	{
4108	vbcppExprParseSkipWhiteSpace(pParser);
4109	char ch = *pParser->pszCur;
4110	if (ch == '\0')
4111	return vbcppExprParseError(pParser, "Premature end of expression");
4112
4113	/*
4114	* Value?
4115	*/
4116	if (ch == '\'')
4117	return vbcppExprParseCharacterConstant(pParser);
4118	if (RT_C_IS_DIGIT(ch))
4119	return vbcppExprParseNumber(pParser);
4120	if (ch == '"')
4121	return vbcppExprParseError(pParser, "String litteral");
4122	if (vbcppIsCIdentifierLeadChar(ch))
4123	return vbcppExprParseIdentifier(pParser);
4124
4125	/*
4126	* Operator?
4127	*/
4128	VBCPPUNARYOP enmOperator;
4129	if (ch == '+')
4130	{
4131	enmOperator = kVBCppUnaryOp_Pluss;
4132	if (pParser->pszCur[1] == '+')
4133	return vbcppExprParseError(pParser, "The prefix increment operator is not valid in a preprocessor expression");
4134	}
4135	else if (ch == '-')
4136	{
4137	enmOperator = kVBCppUnaryOp_Minus;
4138	if (pParser->pszCur[1] == '-')
4139	return vbcppExprParseError(pParser, "The prefix decrement operator is not valid in a preprocessor expression");
4140	}
4141	else if (ch == '!')
4142	enmOperator = kVBCppUnaryOp_LogicalNot;
4143	else if (ch == '~')
4144	enmOperator = kVBCppUnaryOp_BitwiseNot;
4145	else if (ch == '(')
4146	enmOperator = kVBCppUnaryOp_Parenthesis;
4147	else if ((ch == ',' \|\| ch == ')') && pParser->pCur->enmKind == kVBCppExprKind_UndefMacroCall)
4148	{
4149	pParser->pszCur++;
4150	pParser->pCur->fComplete = ch == ')';
4151	return kExprRet_EndOfExpr;
4152	}
4153	else
4154	return vbcppExprParseError(pParser, "Unexpected token '%.*s'", 32, pParser->pszCur - 1);
4155	pParser->pszCur++;
4156
4157	/* Create an operator node. */
4158	PVBCPPEXPR pExpr = vbcppExprParseAllocNode(pParser);
4159	if (!pExpr)
4160	return kExprRet_Error;
4161	pExpr->fComplete = false;
4162	pExpr->enmKind = kVBCppExprKind_Unary;
4163	pExpr->u.Unary.enmOperator = enmOperator;
4164	pExpr->u.Unary.pArg = NULL;
4165
4166	/* Link it into the tree. */
4167	pExpr->pParent = pParser->pCur;
4168	pParser->pCur = pExpr;
4169	*pParser->ppCur = pExpr;
4170	pParser->ppCur = &pExpr->u.Unary.pArg;
4171
4172	return kExprRet_UnaryOperator;
4173	}
4174
4175
4176	/**
4177	* Parses an expanded preprocessor expression.
4178	*
4179	* @returns RTEXITCODE_SUCCESS or RTEXITCODE_FAILURE+msg.
4180	* @param pThis The C preprocessor instance.
4181	* @param pszExpr The expression to parse.
4182	* @param cchExpr The length of the expression in case we need it.
4183	* @param ppExprTree Where to return the parse tree.
4184	* @param pcUndefined Where to return the number of unknown undefined
4185	* macros. Optional.
4186	*/
4187	static RTEXITCODE vbcppExprParse(PVBCPP pThis, char pszExpr, size_t cchExpr, PVBCPPEXPR ppExprTree, size_t *pcUndefined)
4188	{
4189	RTEXITCODE rcExit = RTEXITCODE_FAILURE;
4190	NOREF(cchExpr);
4191
4192	/*
4193	* Initialize the parser context structure.
4194	*/
4195	VBCPPEXPRPARSER Parser;
4196	Parser.pszCur = pszExpr;
4197	Parser.pRoot = NULL;
4198	Parser.pCur = NULL;
4199	Parser.ppCur = &Parser.pRoot;
4200	Parser.pszExpr = pszExpr;
4201	Parser.cUndefined = 0;
4202	Parser.pThis = pThis;
4203
4204	/*
4205	* Do the parsing.
4206	*/
4207	VBCPPEXPRRET enmRet;
4208	for (;;)
4209	{
4210	/*
4211	* Eat unary operators until we hit a value.
4212	*/
4213	do
4214	enmRet = vbcppExprParseUnaryOrValue(&Parser);
4215	while (enmRet == kExprRet_UnaryOperator);
4216	if (enmRet == kExprRet_Error)
4217	break;
4218	AssertBreakStmt(enmRet == kExprRet_Value, enmRet = vbcppExprParseError(&Parser, "Expected value (enmRet=%d)", enmRet));
4219
4220	/*
4221	* Non-unary operator, right parenthesis or end of expression is up next.
4222	*/
4223	enmRet = vbcppExprParseBinaryOrEoeOrRparen(&Parser);
4224	if (enmRet == kExprRet_Error)
4225	break;
4226	if (enmRet == kExprRet_EndOfExpr)
4227	{
4228	/** @todo check if there are any open parentheses. */
4229	rcExit = RTEXITCODE_SUCCESS;
4230	break;
4231	}
4232	AssertBreakStmt(enmRet == kExprRet_Ok, enmRet = vbcppExprParseError(&Parser, "Expected value (enmRet=%d)", enmRet));
4233	}
4234
4235	if (rcExit != RTEXITCODE_SUCCESS)
4236	{
4237	vbcppExprDestoryTree(Parser.pRoot);
4238	return rcExit;
4239	}
4240
4241	if (pcUndefined)
4242	*pcUndefined = Parser.cUndefined;
4243	*ppExprTree = Parser.pRoot;
4244	return rcExit;
4245	}
4246
4247
4248	/**
4249	* Checks if an expression value value is evaluates to @c true or @c false.
4250	*
4251	* @returns @c true or @c false.
4252	* @param pExpr The value expression.
4253	*/
4254	static bool vbcppExprIsExprTrue(PVBCPPEXPR pExpr)
4255	{
4256	Assert(pExpr->enmKind == kVBCppExprKind_SignedValue \|\| pExpr->enmKind == kVBCppExprKind_UnsignedValue);
4257
4258	return pExpr->enmKind == kVBCppExprKind_SignedValue
4259	? pExpr->u.SignedValue.s64 != 0
4260	: pExpr->u.UnsignedValue.u64 != 0;
4261	}
4262
4263
4264	/**
4265	* Evalutes a parse (sub-)tree.
4266	*
4267	* @returns RTEXITCODE_SUCCESS or RTEXITCODE_FAILURE+msg.
4268	* @param pThis The C preprocessor instance.
4269	* @param pRoot The root of the parse (sub-)tree.
4270	* @param pResult Where to store the result value.
4271	*/
4272	static RTEXITCODE vbcppExprEvaluteTree(PVBCPP pThis, PVBCPPEXPR pRoot, PVBCPPEXPR pResult)
4273	{
4274	RTEXITCODE rcExit;
4275	switch (pRoot->enmKind)
4276	{
4277	case kVBCppExprKind_SignedValue:
4278	pResult->enmKind = kVBCppExprKind_SignedValue;
4279	pResult->u.SignedValue.s64 = pRoot->u.SignedValue.s64;
4280	return RTEXITCODE_SUCCESS;
4281
4282	case kVBCppExprKind_UnsignedValue:
4283	pResult->enmKind = kVBCppExprKind_UnsignedValue;
4284	pResult->u.UnsignedValue.u64 = pRoot->u.UnsignedValue.u64;
4285	return RTEXITCODE_SUCCESS;
4286
4287	case kVBCppExprKind_Unary:
4288	rcExit = vbcppExprEvaluteTree(pThis, pRoot->u.Unary.pArg, pResult);
4289	if (rcExit != RTEXITCODE_SUCCESS)
4290	return rcExit;
4291
4292	/* Apply the unary operator to the value */
4293	switch (pRoot->u.Unary.enmOperator)
4294	{
4295	case kVBCppUnaryOp_Minus:
4296	if (pResult->enmKind == kVBCppExprKind_SignedValue)
4297	pResult->u.SignedValue.s64 = -pResult->u.SignedValue.s64;
4298	else
4299	pResult->u.UnsignedValue.u64 = (uint64_t)-(int64_t)pResult->u.UnsignedValue.u64;
4300	break;
4301
4302	case kVBCppUnaryOp_LogicalNot:
4303	if (pResult->enmKind == kVBCppExprKind_SignedValue)
4304	pResult->u.SignedValue.s64 = !pResult->u.SignedValue.s64;
4305	else
4306	pResult->u.UnsignedValue.u64 = !pResult->u.UnsignedValue.u64;
4307	break;
4308
4309	case kVBCppUnaryOp_BitwiseNot:
4310	if (pResult->enmKind == kVBCppExprKind_SignedValue)
4311	pResult->u.SignedValue.s64 = ~pResult->u.SignedValue.s64;
4312	else
4313	pResult->u.UnsignedValue.u64 = ~pResult->u.UnsignedValue.u64;
4314	break;
4315
4316	case kVBCppUnaryOp_Pluss:
4317	case kVBCppUnaryOp_Parenthesis:
4318	/* do nothing. */
4319	break;
4320
4321	default:
4322	return vbcppError(pThis, "Internal error: u.Unary.enmOperator=%d", pRoot->u.Unary.enmOperator);
4323	}
4324	return RTEXITCODE_SUCCESS;
4325
4326	case kVBCppExprKind_Binary:
4327	{
4328	/* Always evalute the left side. */
4329	rcExit = vbcppExprEvaluteTree(pThis, pRoot->u.Binary.pLeft, pResult);
4330	if (rcExit != RTEXITCODE_SUCCESS)
4331	return rcExit;
4332
4333	/* If logical AND or OR we can sometimes skip evaluting the right side. */
4334	if ( pRoot->u.Binary.enmOperator == kVBCppBinary_LogicalAnd
4335	&& !vbcppExprIsExprTrue(pResult))
4336	return RTEXITCODE_SUCCESS;
4337
4338	if ( pRoot->u.Binary.enmOperator == kVBCppBinary_LogicalOr
4339	&& vbcppExprIsExprTrue(pResult))
4340	return RTEXITCODE_SUCCESS;
4341
4342	/* Evalute the right side. */
4343	VBCPPEXPR Result2;
4344	rcExit = vbcppExprEvaluteTree(pThis, pRoot->u.Binary.pRight, &Result2);
4345	if (rcExit != RTEXITCODE_SUCCESS)
4346	return rcExit;
4347
4348	/* If one of them is unsigned, promote the other to unsigned as well. */
4349	if ( pResult->enmKind == kVBCppExprKind_UnsignedValue
4350	&& Result2.enmKind == kVBCppExprKind_SignedValue)
4351	{
4352	Result2.enmKind = kVBCppExprKind_UnsignedValue;
4353	Result2.u.UnsignedValue.u64 = Result2.u.SignedValue.s64;
4354	}
4355	else if ( pResult->enmKind == kVBCppExprKind_SignedValue
4356	&& Result2.enmKind == kVBCppExprKind_UnsignedValue)
4357	{
4358	pResult->enmKind = kVBCppExprKind_UnsignedValue;
4359	pResult->u.UnsignedValue.u64 = pResult->u.SignedValue.s64;
4360	}
4361
4362	/* Perform the operation. */
4363	if (pResult->enmKind == kVBCppExprKind_UnsignedValue)
4364	{
4365	switch (pRoot->u.Binary.enmOperator)
4366	{
4367	case kVBCppBinary_Multiplication:
4368	pResult->u.UnsignedValue.u64 *= Result2.u.UnsignedValue.u64;
4369	break;
4370	case kVBCppBinary_Division:
4371	if (!Result2.u.UnsignedValue.u64)
4372	return vbcppError(pThis, "Divide by zero");
4373	pResult->u.UnsignedValue.u64 /= Result2.u.UnsignedValue.u64;
4374	break;
4375	case kVBCppBinary_Modulo:
4376	if (!Result2.u.UnsignedValue.u64)
4377	return vbcppError(pThis, "Divide by zero");
4378	pResult->u.UnsignedValue.u64 %= Result2.u.UnsignedValue.u64;
4379	break;
4380	case kVBCppBinary_Addition:
4381	pResult->u.UnsignedValue.u64 += Result2.u.UnsignedValue.u64;
4382	break;
4383	case kVBCppBinary_Subtraction:
4384	pResult->u.UnsignedValue.u64 -= Result2.u.UnsignedValue.u64;
4385	break;
4386	case kVBCppBinary_LeftShift:
4387	pResult->u.UnsignedValue.u64 <<= Result2.u.UnsignedValue.u64;
4388	break;
4389	case kVBCppBinary_RightShift:
4390	pResult->u.UnsignedValue.u64 >>= Result2.u.UnsignedValue.u64;
4391	break;
4392	case kVBCppBinary_LessThan:
4393	pResult->u.UnsignedValue.u64 = pResult->u.UnsignedValue.u64 < Result2.u.UnsignedValue.u64;
4394	break;
4395	case kVBCppBinary_LessThanOrEqual:
4396	pResult->u.UnsignedValue.u64 = pResult->u.UnsignedValue.u64 <= Result2.u.UnsignedValue.u64;
4397	break;
4398	case kVBCppBinary_GreaterThan:
4399	pResult->u.UnsignedValue.u64 = pResult->u.UnsignedValue.u64 > Result2.u.UnsignedValue.u64;
4400	break;
4401	case kVBCppBinary_GreaterThanOrEqual:
4402	pResult->u.UnsignedValue.u64 = pResult->u.UnsignedValue.u64 >= Result2.u.UnsignedValue.u64;
4403	break;
4404	case kVBCppBinary_EqualTo:
4405	pResult->u.UnsignedValue.u64 = pResult->u.UnsignedValue.u64 == Result2.u.UnsignedValue.u64;
4406	break;
4407	case kVBCppBinary_NotEqualTo:
4408	pResult->u.UnsignedValue.u64 = pResult->u.UnsignedValue.u64 != Result2.u.UnsignedValue.u64;
4409	break;
4410	case kVBCppBinary_BitwiseAnd:
4411	pResult->u.UnsignedValue.u64 &= Result2.u.UnsignedValue.u64;
4412	break;
4413	case kVBCppBinary_BitwiseXor:
4414	pResult->u.UnsignedValue.u64 ^= Result2.u.UnsignedValue.u64;
4415	break;
4416	case kVBCppBinary_BitwiseOr:
4417	pResult->u.UnsignedValue.u64 \|= Result2.u.UnsignedValue.u64;
4418	break;
4419	case kVBCppBinary_LogicalAnd:
4420	pResult->u.UnsignedValue.u64 = pResult->u.UnsignedValue.u64 && Result2.u.UnsignedValue.u64;
4421	break;
4422	case kVBCppBinary_LogicalOr:
4423	pResult->u.UnsignedValue.u64 = pResult->u.UnsignedValue.u64 \|\| Result2.u.UnsignedValue.u64;
4424	break;
4425	default:
4426	return vbcppError(pThis, "Internal error: u.Binary.enmOperator=%d", pRoot->u.Binary.enmOperator);
4427	}
4428	}
4429	else
4430	{
4431	switch (pRoot->u.Binary.enmOperator)
4432	{
4433	case kVBCppBinary_Multiplication:
4434	pResult->u.SignedValue.s64 *= Result2.u.SignedValue.s64;
4435	break;
4436	case kVBCppBinary_Division:
4437	if (!Result2.u.SignedValue.s64)
4438	return vbcppError(pThis, "Divide by zero");
4439	pResult->u.SignedValue.s64 /= Result2.u.SignedValue.s64;
4440	break;
4441	case kVBCppBinary_Modulo:
4442	if (!Result2.u.SignedValue.s64)
4443	return vbcppError(pThis, "Divide by zero");
4444	pResult->u.SignedValue.s64 %= Result2.u.SignedValue.s64;
4445	break;
4446	case kVBCppBinary_Addition:
4447	pResult->u.SignedValue.s64 += Result2.u.SignedValue.s64;
4448	break;
4449	case kVBCppBinary_Subtraction:
4450	pResult->u.SignedValue.s64 -= Result2.u.SignedValue.s64;
4451	break;
4452	case kVBCppBinary_LeftShift:
4453	pResult->u.SignedValue.s64 <<= Result2.u.SignedValue.s64;
4454	break;
4455	case kVBCppBinary_RightShift:
4456	pResult->u.SignedValue.s64 >>= Result2.u.SignedValue.s64;
4457	break;
4458	case kVBCppBinary_LessThan:
4459	pResult->u.SignedValue.s64 = pResult->u.SignedValue.s64 < Result2.u.SignedValue.s64;
4460	break;
4461	case kVBCppBinary_LessThanOrEqual:
4462	pResult->u.SignedValue.s64 = pResult->u.SignedValue.s64 <= Result2.u.SignedValue.s64;
4463	break;
4464	case kVBCppBinary_GreaterThan:
4465	pResult->u.SignedValue.s64 = pResult->u.SignedValue.s64 > Result2.u.SignedValue.s64;
4466	break;
4467	case kVBCppBinary_GreaterThanOrEqual:
4468	pResult->u.SignedValue.s64 = pResult->u.SignedValue.s64 >= Result2.u.SignedValue.s64;
4469	break;
4470	case kVBCppBinary_EqualTo:
4471	pResult->u.SignedValue.s64 = pResult->u.SignedValue.s64 == Result2.u.SignedValue.s64;
4472	break;
4473	case kVBCppBinary_NotEqualTo:
4474	pResult->u.SignedValue.s64 = pResult->u.SignedValue.s64 != Result2.u.SignedValue.s64;
4475	break;
4476	case kVBCppBinary_BitwiseAnd:
4477	pResult->u.SignedValue.s64 &= Result2.u.SignedValue.s64;
4478	break;
4479	case kVBCppBinary_BitwiseXor:
4480	pResult->u.SignedValue.s64 ^= Result2.u.SignedValue.s64;
4481	break;
4482	case kVBCppBinary_BitwiseOr:
4483	pResult->u.SignedValue.s64 \|= Result2.u.SignedValue.s64;
4484	break;
4485	case kVBCppBinary_LogicalAnd:
4486	pResult->u.SignedValue.s64 = pResult->u.SignedValue.s64 && Result2.u.SignedValue.s64;
4487	break;
4488	case kVBCppBinary_LogicalOr:
4489	pResult->u.SignedValue.s64 = pResult->u.SignedValue.s64 \|\| Result2.u.SignedValue.s64;
4490	break;
4491	default:
4492	return vbcppError(pThis, "Internal error: u.Binary.enmOperator=%d", pRoot->u.Binary.enmOperator);
4493	}
4494	}
4495	return rcExit;
4496	}
4497
4498	case kVBCppExprKind_Ternary:
4499	rcExit = vbcppExprEvaluteTree(pThis, pRoot->u.Ternary.pExpr, pResult);
4500	if (rcExit != RTEXITCODE_SUCCESS)
4501	return rcExit;
4502	if (vbcppExprIsExprTrue(pResult))
4503	return vbcppExprEvaluteTree(pThis, pRoot->u.Ternary.pTrue, pResult);
4504	return vbcppExprEvaluteTree(pThis, pRoot->u.Ternary.pFalse, pResult);
4505
4506	default:
4507	return vbcppError(pThis, "Internal error: enmKind=%d", pRoot->enmKind);
4508	}
4509	}
4510
4511
4512	/**
4513	* Evalutes the expression.
4514	*
4515	* @returns RTEXITCODE_SUCCESS or RTEXITCODE_FAILURE+msg.
4516	* @param pThis The C preprocessor instance.
4517	* @param pszExpr The expression.
4518	* @param cchExpr The length of the expression.
4519	* @param cReplacements The number of replacements.
4520	* @param cDefinedUnknown The number of defined(UNKNOWN) cases. (Relevant
4521	* for selective modes.)
4522	* @param penmResult Where to store the result.
4523	*/
4524	static RTEXITCODE vbcppExprEval(PVBCPP pThis, char *pszExpr, size_t cchExpr, size_t cReplacements, size_t cDefinedUnknown,
4525	VBCPPEVAL *penmResult)
4526	{
4527	Assert(strlen(pszExpr) == cchExpr);
4528	RT_NOREF_PV(cReplacements);
4529
4530	size_t cUndefined;
4531	PVBCPPEXPR pExprTree;
4532	RTEXITCODE rcExit = vbcppExprParse(pThis, pszExpr, cchExpr, &pExprTree, &cUndefined);
4533	if (rcExit == RTEXITCODE_SUCCESS)
4534	{
4535	if ( (!cUndefined && !cDefinedUnknown)
4536	\|\| pThis->enmMode == kVBCppMode_SelectiveD
4537	\|\| pThis->enmMode == kVBCppMode_Standard)
4538	{
4539	VBCPPEXPR Result;
4540	rcExit = vbcppExprEvaluteTree(pThis, pExprTree, &Result);
4541	if (rcExit == RTEXITCODE_SUCCESS)
4542	{
4543	if (vbcppExprIsExprTrue(&Result))
4544	*penmResult = kVBCppEval_True;
4545	else
4546	*penmResult = kVBCppEval_False;
4547	}
4548	}
4549	else
4550	*penmResult = kVBCppEval_Undecided;
4551	}
4552	return rcExit;
4553	}
4554
4555
4556	static RTEXITCODE vbcppExtractSkipCommentLine(PVBCPP pThis, PSCMSTREAM pStrmInput)
4557	{
4558	RT_NOREF_PV(pThis);
4559
4560	unsigned chPrev = ScmStreamGetCh(pStrmInput); Assert(chPrev == '/');
4561	unsigned ch;
4562	while ((ch = ScmStreamPeekCh(pStrmInput)) != ~(unsigned)0)
4563	{
4564	if (ch == '\r' \|\| ch == '\n')
4565	{
4566	if (chPrev != '\\')
4567	break;
4568	ScmStreamSeekByLine(pStrmInput, ScmStreamTellLine(pStrmInput) + 1);
4569	chPrev = ch;
4570	}
4571	else
4572	{
4573	chPrev = ScmStreamGetCh(pStrmInput);
4574	Assert(chPrev == ch);
4575	}
4576	}
4577	return RTEXITCODE_SUCCESS;
4578	}
4579
4580
4581	static RTEXITCODE vbcppExtractSkipComment(PVBCPP pThis, PSCMSTREAM pStrmInput)
4582	{
4583	unsigned ch = ScmStreamGetCh(pStrmInput); Assert(ch == '*');
4584	while ((ch = ScmStreamGetCh(pStrmInput)) != ~(unsigned)0)
4585	{
4586	if (ch == '*')
4587	{
4588	ch = ScmStreamGetCh(pStrmInput);
4589	if (ch == '/')
4590	return RTEXITCODE_SUCCESS;
4591	}
4592	}
4593	return vbcppError(pThis, "Expected '*/'");
4594	}
4595
4596
4597	static RTEXITCODE vbcppExtractQuotedString(PVBCPP pThis, PSCMSTREAM pStrmInput, PVBCPPSTRBUF pStrBuf,
4598	char chOpen, char chClose)
4599	{
4600	unsigned ch = ScmStreamGetCh(pStrmInput);
4601	Assert(ch == (unsigned)chOpen);
4602
4603	RTEXITCODE rcExit = vbcppStrBufAppendCh(pStrBuf, chOpen);
4604	if (rcExit != RTEXITCODE_SUCCESS)
4605	return rcExit;
4606
4607	for (;;)
4608	{
4609	ch = ScmStreamGetCh(pStrmInput);
4610	if (ch == '\\')
4611	{
4612	ch = ScmStreamGetCh(pStrmInput);
4613	if (ch == ~(unsigned)0)
4614	break;
4615	rcExit = vbcppStrBufAppendCh(pStrBuf, '\\');
4616	if (rcExit == RTEXITCODE_SUCCESS)
4617	rcExit = vbcppStrBufAppendCh(pStrBuf, ch);
4618	if (rcExit != RTEXITCODE_SUCCESS)
4619	return rcExit;
4620	}
4621	else if (ch != ~(unsigned)0)
4622	{
4623	rcExit = vbcppStrBufAppendCh(pStrBuf, ch);
4624	if (rcExit != RTEXITCODE_SUCCESS)
4625	return rcExit;
4626	if (ch == (unsigned)chClose)
4627	return RTEXITCODE_SUCCESS;
4628	}
4629	else
4630	break;
4631	}
4632
4633	return vbcppError(pThis, "File ended with an open character constant");
4634	}
4635
4636
4637	/**
4638	* Extracts a line from the stream, stripping it for comments and maybe
4639	* optimzing some of the whitespace.
4640	*
4641	* @returns RTEXITCODE_SUCCESS or RTEXITCODE_FAILURE+msg.
4642	* @param pThis The C preprocessor instance.
4643	* @param pStrmInput The input stream.
4644	* @param pStrBuf Where to store the extracted line. Caller must
4645	* initialize this prior to the call an delete it
4646	* after use (even on failure).
4647	* @param poffComment Where to note down the position of the final
4648	* comment. Optional.
4649	*/
4650	static RTEXITCODE vbcppExtractDirectiveLine(PVBCPP pThis, PSCMSTREAM pStrmInput, PVBCPPSTRBUF pStrBuf, size_t *poffComment)
4651	{
4652	size_t offComment = ~(size_t)0;
4653	unsigned ch;
4654	while ((ch = ScmStreamPeekCh(pStrmInput)) != ~(unsigned)0)
4655	{
4656	RTEXITCODE rcExit;
4657	if (ch == '/')
4658	{
4659	/* Comment? */
4660	unsigned ch2 = ScmStreamGetCh(pStrmInput); Assert(ch == ch2); NOREF(ch2);
4661	ch = ScmStreamPeekCh(pStrmInput);
4662	if (ch == '*')
4663	{
4664	offComment = ScmStreamTell(pStrmInput) - 1;
4665	rcExit = vbcppExtractSkipComment(pThis, pStrmInput);
4666	}
4667	else if (ch == '/')
4668	{
4669	offComment = ScmStreamTell(pStrmInput) - 1;
4670	rcExit = vbcppExtractSkipCommentLine(pThis, pStrmInput);
4671	}
4672	else
4673	rcExit = vbcppStrBufAppendCh(pStrBuf, '/');
4674	}
4675	else if (ch == '\'')
4676	{
4677	offComment = ~(size_t)0;
4678	rcExit = vbcppExtractQuotedString(pThis, pStrmInput, pStrBuf, '\'', '\'');
4679	}
4680	else if (ch == '"')
4681	{
4682	offComment = ~(size_t)0;
4683	rcExit = vbcppExtractQuotedString(pThis, pStrmInput, pStrBuf, '"', '"');
4684	}
4685	else if (ch == '\r' \|\| ch == '\n')
4686	break; /* done */
4687	else if ( RT_C_IS_SPACE(ch)
4688	&& ( RT_C_IS_SPACE(vbcppStrBufLastCh(pStrBuf))
4689	\|\| vbcppStrBufLastCh(pStrBuf) == '\0') )
4690	{
4691	unsigned ch2 = ScmStreamGetCh(pStrmInput);
4692	Assert(ch == ch2); NOREF(ch2);
4693	rcExit = RTEXITCODE_SUCCESS;
4694	}
4695	else
4696	{
4697	unsigned ch2 = ScmStreamGetCh(pStrmInput); Assert(ch == ch2);
4698
4699	/* Escaped newline? */
4700	if ( ch == '\\'
4701	&& ( (ch2 = ScmStreamPeekCh(pStrmInput)) == '\r'
4702	\|\| ch2 == '\n'))
4703	{
4704	ScmStreamSeekByLine(pStrmInput, ScmStreamTellLine(pStrmInput) + 1);
4705	rcExit = RTEXITCODE_SUCCESS;
4706	}
4707	else
4708	{
4709	offComment = ~(size_t)0;
4710	rcExit = vbcppStrBufAppendCh(pStrBuf, ch);
4711	}
4712	}
4713	if (rcExit != RTEXITCODE_SUCCESS)
4714	return rcExit;
4715	}
4716
4717	if (poffComment)
4718	*poffComment = offComment;
4719	return RTEXITCODE_SUCCESS;
4720	}
4721
4722
4723	/**
4724	* Processes a abbreviated line number directive.
4725	*
4726	* @returns RTEXITCODE_SUCCESS or RTEXITCODE_FAILURE+msg.
4727	* @param pThis The C preprocessor instance.
4728	* @param pStrmInput The input stream.
4729	* @param offStart The stream position where the directive
4730	* started (for pass thru).
4731	* @param enmKind The kind of directive we're processing.
4732	*/
4733	static RTEXITCODE vbcppDirectiveIfOrElif(PVBCPP pThis, PSCMSTREAM pStrmInput, size_t offStart,
4734	VBCPPCONDKIND enmKind)
4735	{
4736	/*
4737	* Check for missing #if if #elif.
4738	*/
4739	if ( enmKind == kVBCppCondKind_ElIf
4740	&& !pThis->pCondStack )
4741	return vbcppError(pThis, "#elif without #if");
4742
4743	/*
4744	* Extract the expression string.
4745	*/
4746	const char *pchCondition = ScmStreamGetCur(pStrmInput);
4747	size_t offComment;
4748	VBCPPMACROEXP ExpCtx;
4749	#if 0
4750	ExpCtx.pMacroStack = NULL;
4751	#endif
4752	ExpCtx.pStrmInput = NULL;
4753	ExpCtx.papszArgs = NULL;
4754	ExpCtx.cArgs = 0;
4755	ExpCtx.cArgsAlloced = 0;
4756	vbcppStrBufInit(&ExpCtx.StrBuf, pThis);
4757	RTEXITCODE rcExit = vbcppExtractDirectiveLine(pThis, pStrmInput, &ExpCtx.StrBuf, &offComment);
4758	if (rcExit == RTEXITCODE_SUCCESS)
4759	{
4760	if (RT_C_IS_SPACE(*pchCondition))
4761	pchCondition++;
4762	size_t const cchCondition = ScmStreamGetCur(pStrmInput) - pchCondition;
4763
4764	/*
4765	* Expand known macros in it.
4766	*/
4767	size_t cReplacements;
4768	size_t cDefinedUnknown;
4769	rcExit = vbcppMacroExpandReScan(pThis, &ExpCtx, kMacroReScanMode_Expression, &cReplacements, &cDefinedUnknown);
4770	if (rcExit == RTEXITCODE_SUCCESS)
4771	{
4772	/*
4773	* Strip it and check that it's not empty.
4774	*/
4775	char *pszExpr = ExpCtx.StrBuf.pszBuf;
4776	size_t cchExpr = ExpCtx.StrBuf.cchBuf;
4777	while (cchExpr > 0 && RT_C_IS_SPACE(*pszExpr))
4778	pszExpr++, cchExpr--;
4779
4780	while (cchExpr > 0 && RT_C_IS_SPACE(pszExpr[cchExpr - 1]))
4781	{
4782	pszExpr[--cchExpr] = '\0';
4783	ExpCtx.StrBuf.cchBuf--;
4784	}
4785	if (cchExpr)
4786	{
4787	/*
4788	* Now, evalute the expression.
4789	*/
4790	VBCPPEVAL enmResult;
4791	rcExit = vbcppExprEval(pThis, pszExpr, cchExpr, cReplacements, cDefinedUnknown, &enmResult);
4792	if (rcExit == RTEXITCODE_SUCCESS)
4793	{
4794	/*
4795	* Take action.
4796	*/
4797	if (enmKind != kVBCppCondKind_ElIf)
4798	rcExit = vbcppCondPush(pThis, pStrmInput, offComment, enmKind, enmResult,
4799	pchCondition, cchCondition);
4800	else
4801	{
4802	PVBCPPCOND pCond = pThis->pCondStack;
4803	if ( pCond->enmResult != kVBCppEval_Undecided
4804	&& ( !pCond->pUp
4805	\|\| pCond->pUp->enmStackResult == kVBCppEval_True))
4806	{
4807	Assert(enmResult == kVBCppEval_True \|\| enmResult == kVBCppEval_False);
4808	if ( pCond->enmResult == kVBCppEval_False
4809	&& enmResult == kVBCppEval_True
4810	&& !pCond->fElIfDecided)
4811	{
4812	pCond->enmStackResult = kVBCppEval_True;
4813	pCond->fElIfDecided = true;
4814	}
4815	else
4816	pCond->enmStackResult = kVBCppEval_False;
4817	pThis->fIf0Mode = pCond->enmStackResult == kVBCppEval_False;
4818	}
4819	pCond->enmKind = kVBCppCondKind_ElIf;
4820	pCond->enmResult = enmResult;
4821	pCond->pchCond = pchCondition;
4822	pCond->cchCond = cchCondition;
4823
4824	/*
4825	* Do #elif pass thru.
4826	*/
4827	if ( !pThis->fIf0Mode
4828	&& pCond->enmResult == kVBCppEval_Undecided)
4829	{
4830	ssize_t cch = ScmStreamPrintf(&pThis->StrmOutput, "#%*selif", pCond->iKeepLevel - 1, "");
4831	if (cch > 0)
4832	rcExit = vbcppOutputComment(pThis, pStrmInput, offStart, cch, 1);
4833	else
4834	rcExit = vbcppError(pThis, "Output error %Rrc", (int)cch);
4835	}
4836	else
4837	pThis->fJustDroppedLine = true;
4838	}
4839	}
4840	}
4841	else
4842	rcExit = vbcppError(pThis, "Empty #if expression");
4843	}
4844	}
4845	vbcppMacroExpandCleanup(&ExpCtx);
4846	return rcExit;
4847	}
4848
4849
4850	/**
4851	* Processes a abbreviated line number directive.
4852	*
4853	* @returns RTEXITCODE_SUCCESS or RTEXITCODE_FAILURE+msg.
4854	* @param pThis The C preprocessor instance.
4855	* @param pStrmInput The input stream.
4856	* @param offStart The stream position where the directive
4857	* started (for pass thru).
4858	*/
4859	static RTEXITCODE vbcppDirectiveIfDef(PVBCPP pThis, PSCMSTREAM pStrmInput, size_t offStart)
4860	{
4861	/*
4862	* Parse it.
4863	*/
4864	RTEXITCODE rcExit = vbcppProcessSkipWhiteEscapedEolAndComments(pThis, pStrmInput);
4865	if (rcExit == RTEXITCODE_SUCCESS)
4866	{
4867	size_t cchDefine;
4868	const char *pchDefine = ScmStreamCGetWord(pStrmInput, &cchDefine);
4869	if (pchDefine)
4870	{
4871	rcExit = vbcppProcessSkipWhiteEscapedEolAndCommentsCheckEol(pThis, pStrmInput);
4872	if (rcExit == RTEXITCODE_SUCCESS)
4873	{
4874	/*
4875	* Evaluate it.
4876	*/
4877	VBCPPEVAL enmEval;
4878	if (vbcppMacroExists(pThis, pchDefine, cchDefine))
4879	enmEval = kVBCppEval_True;
4880	else if ( !pThis->fUndecidedConditionals
4881	\|\| RTStrSpaceGetN(&pThis->UndefStrSpace, pchDefine, cchDefine) != NULL)
4882	enmEval = kVBCppEval_False;
4883	else
4884	enmEval = kVBCppEval_Undecided;
4885	rcExit = vbcppCondPush(pThis, pStrmInput, offStart, kVBCppCondKind_IfDef, enmEval,
4886	pchDefine, cchDefine);
4887	}
4888	}
4889	else
4890	rcExit = vbcppError(pThis, "Malformed #ifdef");
4891	}
4892	return rcExit;
4893	}
4894
4895
4896	/**
4897	* Processes a abbreviated line number directive.
4898	*
4899	* @returns RTEXITCODE_SUCCESS or RTEXITCODE_FAILURE+msg.
4900	* @param pThis The C preprocessor instance.
4901	* @param pStrmInput The input stream.
4902	* @param offStart The stream position where the directive
4903	* started (for pass thru).
4904	*/
4905	static RTEXITCODE vbcppDirectiveIfNDef(PVBCPP pThis, PSCMSTREAM pStrmInput, size_t offStart)
4906	{
4907	/*
4908	* Parse it.
4909	*/
4910	RTEXITCODE rcExit = vbcppProcessSkipWhiteEscapedEolAndComments(pThis, pStrmInput);
4911	if (rcExit == RTEXITCODE_SUCCESS)
4912	{
4913	size_t cchDefine;
4914	const char *pchDefine = ScmStreamCGetWord(pStrmInput, &cchDefine);
4915	if (pchDefine)
4916	{
4917	rcExit = vbcppProcessSkipWhiteEscapedEolAndCommentsCheckEol(pThis, pStrmInput);
4918	if (rcExit == RTEXITCODE_SUCCESS)
4919	{
4920	/*
4921	* Evaluate it.
4922	*/
4923	VBCPPEVAL enmEval;
4924	if (vbcppMacroExists(pThis, pchDefine, cchDefine))
4925	enmEval = kVBCppEval_False;
4926	else if ( !pThis->fUndecidedConditionals
4927	\|\| RTStrSpaceGetN(&pThis->UndefStrSpace, pchDefine, cchDefine) != NULL)
4928	enmEval = kVBCppEval_True;
4929	else
4930	enmEval = kVBCppEval_Undecided;
4931	rcExit = vbcppCondPush(pThis, pStrmInput, offStart, kVBCppCondKind_IfNDef, enmEval,
4932	pchDefine, cchDefine);
4933	}
4934	}
4935	else
4936	rcExit = vbcppError(pThis, "Malformed #ifndef");
4937	}
4938	return rcExit;
4939	}
4940
4941
4942	/**
4943	* Processes a abbreviated line number directive.
4944	*
4945	* @returns RTEXITCODE_SUCCESS or RTEXITCODE_FAILURE+msg.
4946	* @param pThis The C preprocessor instance.
4947	* @param pStrmInput The input stream.
4948	* @param offStart The stream position where the directive
4949	* started (for pass thru).
4950	*/
4951	static RTEXITCODE vbcppDirectiveElse(PVBCPP pThis, PSCMSTREAM pStrmInput, size_t offStart)
4952	{
4953	/*
4954	* Nothing to parse, just comment positions to find and note down.
4955	*/
4956	offStart = vbcppProcessSkipWhite(pStrmInput);
4957	RTEXITCODE rcExit = vbcppProcessSkipWhiteEscapedEolAndCommentsCheckEol(pThis, pStrmInput);
4958	if (rcExit == RTEXITCODE_SUCCESS)
4959	{
4960	/*
4961	* Execute.
4962	*/
4963	PVBCPPCOND pCond = pThis->pCondStack;
4964	if (pCond)
4965	{
4966	if (!pCond->fSeenElse)
4967	{
4968	pCond->fSeenElse = true;
4969	if ( pCond->enmResult != kVBCppEval_Undecided
4970	&& ( !pCond->pUp
4971	\|\| pCond->pUp->enmStackResult == kVBCppEval_True))
4972	{
4973	if ( pCond->enmResult == kVBCppEval_True
4974	\|\| pCond->fElIfDecided)
4975
4976	pCond->enmStackResult = kVBCppEval_False;
4977	else
4978	pCond->enmStackResult = kVBCppEval_True;
4979	pThis->fIf0Mode = pCond->enmStackResult == kVBCppEval_False;
4980	}
4981
4982	/*
4983	* Do pass thru.
4984	*/
4985	if ( !pThis->fIf0Mode
4986	&& pCond->enmResult == kVBCppEval_Undecided)
4987	{
4988	ssize_t cch = ScmStreamPrintf(&pThis->StrmOutput, "#%*selse", pCond->iKeepLevel - 1, "");
4989	if (cch > 0)
4990	rcExit = vbcppOutputComment(pThis, pStrmInput, offStart, cch, 2);
4991	else
4992	rcExit = vbcppError(pThis, "Output error %Rrc", (int)cch);
4993	}
4994	else
4995	pThis->fJustDroppedLine = true;
4996	}
4997	else
4998	rcExit = vbcppError(pThis, "Double #else or/and missing #endif");
4999	}
5000	else
5001	rcExit = vbcppError(pThis, "#else without #if");
5002	}
5003	return rcExit;
5004	}
5005
5006
5007	/**
5008	* Processes a abbreviated line number directive.
5009	*
5010	* @returns RTEXITCODE_SUCCESS or RTEXITCODE_FAILURE+msg.
5011	* @param pThis The C preprocessor instance.
5012	* @param pStrmInput The input stream.
5013	* @param offStart The stream position where the directive
5014	* started (for pass thru).
5015	*/
5016	static RTEXITCODE vbcppDirectiveEndif(PVBCPP pThis, PSCMSTREAM pStrmInput, size_t offStart)
5017	{
5018	/*
5019	* Nothing to parse, just comment positions to find and note down.
5020	*/
5021	offStart = vbcppProcessSkipWhite(pStrmInput);
5022	RTEXITCODE rcExit = vbcppProcessSkipWhiteEscapedEolAndCommentsCheckEol(pThis, pStrmInput);
5023	if (rcExit == RTEXITCODE_SUCCESS)
5024	{
5025	/*
5026	* Execute.
5027	*/
5028	PVBCPPCOND pCond = pThis->pCondStack;
5029	if (pCond)
5030	{
5031	pThis->pCondStack = pCond->pUp;
5032	pThis->fIf0Mode = pCond->pUp && pCond->pUp->enmStackResult == kVBCppEval_False;
5033
5034	/*
5035	* Do pass thru.
5036	*/
5037	if ( !pThis->fIf0Mode
5038	&& pCond->enmResult == kVBCppEval_Undecided)
5039	{
5040	ssize_t cch = ScmStreamPrintf(&pThis->StrmOutput, "#%*sendif", pCond->iKeepLevel - 1, "");
5041	if (cch > 0)
5042	rcExit = vbcppOutputComment(pThis, pStrmInput, offStart, cch, 1);
5043	else
5044	rcExit = vbcppError(pThis, "Output error %Rrc", (int)cch);
5045	}
5046	else
5047	pThis->fJustDroppedLine = true;
5048	}
5049	else
5050	rcExit = vbcppError(pThis, "#endif without #if");
5051	}
5052	return rcExit;
5053	}
5054
5055
5056
5057
5058
5059	/*
5060	*
5061	*
5062	* Misc Directives
5063	* Misc Directives
5064	* Misc Directives
5065	* Misc Directives
5066	*
5067	*
5068	*/
5069
5070
5071	/**
5072	* Adds an include directory.
5073	*
5074	* @returns Program exit code, with error message on failure.
5075	* @param pThis The C preprocessor instance.
5076	* @param pszDir The directory to add.
5077	*/
5078	static RTEXITCODE vbcppAddInclude(PVBCPP pThis, const char *pszDir)
5079	{
5080	uint32_t cIncludes = pThis->cIncludes;
5081	if (cIncludes >= _64K)
5082	return vbcppError(pThis, "Too many include directories");
5083
5084	void pv = RTMemRealloc(pThis->papszIncludes, (cIncludes + 1) sizeof(char **));
5085	if (!pv)
5086	return vbcppError(pThis, "No memory for include directories");
5087	pThis->papszIncludes = (char **)pv;
5088
5089	int rc = RTStrDupEx(&pThis->papszIncludes[cIncludes], pszDir);
5090	if (RT_FAILURE(rc))
5091	return vbcppError(pThis, "No string memory for include directories");
5092
5093	pThis->cIncludes = cIncludes + 1;
5094	return RTEXITCODE_SUCCESS;
5095	}
5096
5097
5098	/**
5099	* Processes a abbreviated line number directive.
5100	*
5101	* @returns RTEXITCODE_SUCCESS or RTEXITCODE_FAILURE+msg.
5102	* @param pThis The C preprocessor instance.
5103	* @param pStrmInput The input stream.
5104	* @param offStart The stream position where the directive
5105	* started (for pass thru).
5106	*/
5107	static RTEXITCODE vbcppDirectiveInclude(PVBCPP pThis, PSCMSTREAM pStrmInput, size_t offStart)
5108	{
5109	RT_NOREF_PV(offStart);
5110
5111	/*
5112	* Parse it.
5113	*/
5114	RTEXITCODE rcExit = vbcppProcessSkipWhiteEscapedEolAndComments(pThis, pStrmInput);
5115	if (rcExit == RTEXITCODE_SUCCESS)
5116	{
5117	size_t cchFileSpec = 0;
5118	const char *pchFileSpec = NULL;
5119	const char *pchFilename = NULL;
5120
5121	unsigned ch = ScmStreamPeekCh(pStrmInput);
5122	unsigned chType = ch;
5123	if (ch == '"' \|\| ch == '<')
5124	{
5125	ScmStreamGetCh(pStrmInput);
5126	pchFileSpec = pchFilename = ScmStreamGetCur(pStrmInput);
5127	unsigned chEnd = chType == '<' ? '>' : '"';
5128	while ( (ch = ScmStreamGetCh(pStrmInput)) != ~(unsigned)0
5129	&& ch != chEnd)
5130	{
5131	if (ch == '\r' \|\| ch == '\n')
5132	{
5133	rcExit = vbcppError(pThis, "Multi-line include file specfications are not supported");
5134	break;
5135	}
5136	}
5137
5138	if (rcExit == RTEXITCODE_SUCCESS)
5139	{
5140	if (ch != ~(unsigned)0)
5141	cchFileSpec = ScmStreamGetCur(pStrmInput) - pchFilename - 1;
5142	else
5143	rcExit = vbcppError(pThis, "Expected '%c'", chType);
5144	}
5145	}
5146	else if (vbcppIsCIdentifierLeadChar(ch))
5147	{
5148	//pchFileSpec = ScmStreamCGetWord(pStrmInput, &cchFileSpec);
5149	rcExit = vbcppError(pThis, "Including via a define is not implemented yet");
5150	}
5151	else
5152	rcExit = vbcppError(pThis, "Malformed include directive");
5153
5154	/*
5155	* Take down the location of the next non-white space, in case we need
5156	* to pass thru the directive further down. Then skip to the end of the
5157	* line.
5158	*/
5159	size_t const offIncEnd = vbcppProcessSkipWhite(pStrmInput);
5160	if (rcExit == RTEXITCODE_SUCCESS)
5161	rcExit = vbcppProcessSkipWhiteEscapedEolAndCommentsCheckEol(pThis, pStrmInput);
5162
5163	if (rcExit == RTEXITCODE_SUCCESS)
5164	{
5165	/*
5166	* Execute it.
5167	*/
5168	if (pThis->enmIncludeAction == kVBCppIncludeAction_Include)
5169	{
5170	/** @todo Search for the include file and push it onto the input stack.
5171	* Not difficult, just unnecessary rigth now. */
5172	rcExit = vbcppError(pThis, "Sorry, includes are not yet implemented");
5173	}
5174	else if (pThis->enmIncludeAction == kVBCppIncludeAction_PassThru)
5175	{
5176	/* Pretty print the passthru. */
5177	unsigned cchIndent = pThis->pCondStack ? pThis->pCondStack->iKeepLevel : 0;
5178	ssize_t cch;
5179	if (chType == '<')
5180	cch = ScmStreamPrintf(&pThis->StrmOutput, "#%sinclude <%.s>",
5181	cchIndent, "", cchFileSpec, pchFileSpec);
5182	else if (chType == '"')
5183	cch = ScmStreamPrintf(&pThis->StrmOutput, "#%sinclude \"%.s\"",
5184	cchIndent, "", cchFileSpec, pchFileSpec);
5185	else
5186	cch = ScmStreamPrintf(&pThis->StrmOutput, "#%sinclude %.s",
5187	cchIndent, "", cchFileSpec, pchFileSpec);
5188	if (cch > 0)
5189	rcExit = vbcppOutputComment(pThis, pStrmInput, offIncEnd, cch, 1);
5190	else
5191	rcExit = vbcppError(pThis, "Output error %Rrc", (int)cch);
5192
5193	}
5194	else
5195	{
5196	Assert(pThis->enmIncludeAction == kVBCppIncludeAction_Drop);
5197	pThis->fJustDroppedLine = true;
5198	}
5199	}
5200	}
5201	return rcExit;
5202	}
5203
5204
5205	/**
5206	* Processes a abbreviated line number directive.
5207	*
5208	* @returns RTEXITCODE_SUCCESS or RTEXITCODE_FAILURE+msg.
5209	* @param pThis The C preprocessor instance.
5210	* @param pStrmInput The input stream.
5211	* @param offStart The stream position where the directive
5212	* started (for pass thru).
5213	*/
5214	static RTEXITCODE vbcppDirectivePragma(PVBCPP pThis, PSCMSTREAM pStrmInput, size_t offStart)
5215	{
5216	RT_NOREF_PV(offStart);
5217
5218	/*
5219	* Parse out the first word.
5220	*/
5221	RTEXITCODE rcExit = vbcppProcessSkipWhiteEscapedEolAndComments(pThis, pStrmInput);
5222	if (rcExit == RTEXITCODE_SUCCESS)
5223	{
5224	size_t cchPragma;
5225	const char *pchPragma = ScmStreamCGetWord(pStrmInput, &cchPragma);
5226	if (pchPragma)
5227	{
5228	size_t const off2nd = vbcppProcessSkipWhite(pStrmInput);
5229	size_t offComment;
5230	rcExit = vbcppInputSkipToEndOfDirectiveLine(pThis, pStrmInput, &offComment);
5231	if (rcExit == RTEXITCODE_SUCCESS)
5232	{
5233	/*
5234	* What to do about this
5235	*/
5236	bool fPassThru = false;
5237	if ( cchPragma == 1
5238	&& *pchPragma == 'D')
5239	fPassThru = pThis->fPassThruPragmaD;
5240	else if ( cchPragma == 3
5241	&& !strncmp(pchPragma, "STD", 3))
5242	fPassThru = pThis->fPassThruPragmaSTD;
5243	else
5244	fPassThru = pThis->fPassThruPragmaOther;
5245	if (fPassThru)
5246	{
5247	unsigned cchIndent = pThis->pCondStack ? pThis->pCondStack->iKeepLevel : 0;
5248	ssize_t cch = ScmStreamPrintf(&pThis->StrmOutput, "#%spragma %.s",
5249	cchIndent, "", cchPragma, pchPragma);
5250	if (cch > 0)
5251	rcExit = vbcppOutputComment(pThis, pStrmInput, off2nd, cch, 1);
5252	else
5253	rcExit = vbcppError(pThis, "output error");
5254	}
5255	else
5256	pThis->fJustDroppedLine = true;
5257	}
5258	}
5259	else
5260	rcExit = vbcppError(pThis, "Malformed #pragma");
5261	}
5262
5263	return rcExit;
5264	}
5265
5266
5267	/**
5268	* Processes an error directive.
5269	*
5270	* @returns RTEXITCODE_SUCCESS or RTEXITCODE_FAILURE+msg.
5271	* @param pThis The C preprocessor instance.
5272	* @param pStrmInput The input stream.
5273	* @param offStart The stream position where the directive
5274	* started (for pass thru).
5275	*/
5276	static RTEXITCODE vbcppDirectiveError(PVBCPP pThis, PSCMSTREAM pStrmInput, size_t offStart)
5277	{
5278	RT_NOREF(offStart);
5279
5280	/*
5281	* Parse out the message.
5282	*/
5283	size_t const off1st = vbcppProcessSkipWhite(pStrmInput);
5284	size_t offComment;
5285	RTEXITCODE rcExit = vbcppInputSkipToEndOfDirectiveLine(pThis, pStrmInput, &offComment);
5286	if (rcExit == RTEXITCODE_SUCCESS)
5287	{
5288	/*
5289	* What to do about this
5290	*/
5291	if (pThis->fPassThruError)
5292	{
5293	unsigned cchIndent = pThis->pCondStack ? pThis->pCondStack->iKeepLevel : 0;
5294	ssize_t cch = ScmStreamPrintf(&pThis->StrmOutput, "#%*serror", cchIndent, "");
5295	if (cch > 0)
5296	rcExit = vbcppOutputComment(pThis, pStrmInput, off1st, cch, 1);
5297	else
5298	rcExit = vbcppError(pThis, "output error");
5299	return rcExit;
5300	}
5301	return vbcppError(pThis, "Hit an #error");
5302	}
5303	RT_NOREF_PV(offStart);
5304	vbcppError(pThis, "Malformed #error");
5305	return vbcppError(pThis, "Hit an #error");
5306	}
5307
5308
5309	/**
5310	* Processes a abbreviated line number directive.
5311	*
5312	* @returns RTEXITCODE_SUCCESS or RTEXITCODE_FAILURE+msg.
5313	* @param pThis The C preprocessor instance.
5314	* @param pStrmInput The input stream.
5315	* @param offStart The stream position where the directive
5316	* started (for pass thru).
5317	*/
5318	static RTEXITCODE vbcppDirectiveLineNo(PVBCPP pThis, PSCMSTREAM pStrmInput, size_t offStart)
5319	{
5320	RT_NOREF_PV(offStart);
5321	RT_NOREF_PV(pStrmInput);
5322	return vbcppError(pThis, "Not implemented: %s", __FUNCTION__);
5323	}
5324
5325
5326	/**
5327	* Processes a abbreviated line number directive.
5328	*
5329	* @returns RTEXITCODE_SUCCESS or RTEXITCODE_FAILURE+msg.
5330	* @param pThis The C preprocessor instance.
5331	* @param pStrmInput The input stream.
5332	*/
5333	static RTEXITCODE vbcppDirectiveLineNoShort(PVBCPP pThis, PSCMSTREAM pStrmInput)
5334	{
5335	RT_NOREF_PV(pStrmInput);
5336	return vbcppError(pThis, "Not implemented: %s", __FUNCTION__);
5337	}
5338
5339
5340	/**
5341	* Handles a preprocessor directive.
5342	*
5343	* @returns RTEXITCODE_SUCCESS or RTEXITCODE_FAILURE+msg.
5344	* @param pThis The C preprocessor instance.
5345	* @param pStrmInput The input stream.
5346	*/
5347	static RTEXITCODE vbcppProcessDirective(PVBCPP pThis, PSCMSTREAM pStrmInput)
5348	{
5349	/*
5350	* Get the directive and do a string switch on it.
5351	*/
5352	RTEXITCODE rcExit = vbcppProcessSkipWhiteEscapedEolAndComments(pThis, pStrmInput);
5353	if (rcExit != RTEXITCODE_SUCCESS)
5354	return rcExit;
5355	size_t cchDirective;
5356	const char *pchDirective = ScmStreamCGetWord(pStrmInput, &cchDirective);
5357	if (pchDirective)
5358	{
5359	size_t const offStart = ScmStreamTell(pStrmInput);
5360	#define IS_DIRECTIVE(a_sz) ( sizeof(a_sz) - 1 == cchDirective && memcmp(pchDirective, a_sz, sizeof(a_sz) - 1) == 0)
5361	if (IS_DIRECTIVE("if"))
5362	rcExit = vbcppDirectiveIfOrElif(pThis, pStrmInput, offStart, kVBCppCondKind_If);
5363	else if (IS_DIRECTIVE("elif"))
5364	rcExit = vbcppDirectiveIfOrElif(pThis, pStrmInput, offStart, kVBCppCondKind_ElIf);
5365	else if (IS_DIRECTIVE("ifdef"))
5366	rcExit = vbcppDirectiveIfDef(pThis, pStrmInput, offStart);
5367	else if (IS_DIRECTIVE("ifndef"))
5368	rcExit = vbcppDirectiveIfNDef(pThis, pStrmInput, offStart);
5369	else if (IS_DIRECTIVE("else"))
5370	rcExit = vbcppDirectiveElse(pThis, pStrmInput, offStart);
5371	else if (IS_DIRECTIVE("endif"))
5372	rcExit = vbcppDirectiveEndif(pThis, pStrmInput, offStart);
5373	else if (!pThis->fIf0Mode)
5374	{
5375	if (IS_DIRECTIVE("include"))
5376	rcExit = vbcppDirectiveInclude(pThis, pStrmInput, offStart);
5377	else if (IS_DIRECTIVE("define"))
5378	rcExit = vbcppDirectiveDefine(pThis, pStrmInput, offStart);
5379	else if (IS_DIRECTIVE("undef"))
5380	rcExit = vbcppDirectiveUndef(pThis, pStrmInput, offStart);
5381	else if (IS_DIRECTIVE("pragma"))
5382	rcExit = vbcppDirectivePragma(pThis, pStrmInput, offStart);
5383	else if (IS_DIRECTIVE("error"))
5384	rcExit = vbcppDirectiveError(pThis, pStrmInput, offStart);
5385	else if (IS_DIRECTIVE("line"))
5386	rcExit = vbcppDirectiveLineNo(pThis, pStrmInput, offStart);
5387	else
5388	rcExit = vbcppError(pThis, "Unknown preprocessor directive '#%.*s'", cchDirective, pchDirective);
5389	}
5390	#undef IS_DIRECTIVE
5391	}
5392	else if (!pThis->fIf0Mode)
5393	{
5394	/* Could it be a # <num> "file" directive? */
5395	unsigned ch = ScmStreamPeekCh(pStrmInput);
5396	if (RT_C_IS_DIGIT(ch))
5397	rcExit = vbcppDirectiveLineNoShort(pThis, pStrmInput);
5398	else
5399	rcExit = vbcppError(pThis, "Malformed preprocessor directive");
5400	}
5401	return rcExit;
5402	}
5403
5404
5405	/*
5406	*
5407	*
5408	* M a i n b o d y.
5409	* M a i n b o d y.
5410	* M a i n b o d y.
5411	* M a i n b o d y.
5412	* M a i n b o d y.
5413	*
5414	*
5415	*/
5416
5417
5418	/**
5419	* Does the actually preprocessing of the input file.
5420	*
5421	* @returns Exit code.
5422	* @param pThis The C preprocessor instance.
5423	*/
5424	static RTEXITCODE vbcppPreprocess(PVBCPP pThis)
5425	{
5426	RTEXITCODE rcExit = RTEXITCODE_SUCCESS;
5427
5428	/*
5429	* Parse.
5430	*/
5431	while (pThis->pInputStack)
5432	{
5433	pThis->fMaybePreprocessorLine = true;
5434
5435	PSCMSTREAM pStrmInput = &pThis->pInputStack->StrmInput;
5436	unsigned ch;
5437	while ((ch = ScmStreamGetCh(pStrmInput)) != ~(unsigned)0)
5438	{
5439	if (ch == '/')
5440	{
5441	ch = ScmStreamPeekCh(pStrmInput);
5442	if (ch == '*')
5443	rcExit = vbcppProcessMultiLineComment(pThis, pStrmInput);
5444	else if (ch == '/')
5445	rcExit = vbcppProcessOneLineComment(pThis, pStrmInput);
5446	else
5447	{
5448	pThis->fMaybePreprocessorLine = false;
5449	if (!pThis->fIf0Mode)
5450	rcExit = vbcppOutputCh(pThis, '/');
5451	}
5452	}
5453	else if (ch == '#' && pThis->fMaybePreprocessorLine)
5454	{
5455	rcExit = vbcppProcessDirective(pThis, pStrmInput);
5456	pStrmInput = &pThis->pInputStack->StrmInput;
5457	}
5458	else if (ch == '\r' \|\| ch == '\n')
5459	{
5460	if ( ( !pThis->fIf0Mode
5461	&& !pThis->fJustDroppedLine)
5462	\|\| !pThis->fRemoveDroppedLines
5463	\|\| !ScmStreamIsAtStartOfLine(&pThis->StrmOutput))
5464	rcExit = vbcppOutputCh(pThis, ch);
5465	pThis->fJustDroppedLine = false;
5466	pThis->fMaybePreprocessorLine = true;
5467	}
5468	else if (RT_C_IS_SPACE(ch))
5469	{
5470	if (!pThis->fIf0Mode)
5471	rcExit = vbcppOutputCh(pThis, ch);
5472	}
5473	else
5474	{
5475	pThis->fMaybePreprocessorLine = false;
5476	if (!pThis->fIf0Mode)
5477	{
5478	if (ch == '"')
5479	rcExit = vbcppProcessStringLitteral(pThis, pStrmInput);
5480	else if (ch == '\'')
5481	rcExit = vbcppProcessCharacterConstant(pThis, pStrmInput);
5482	else if (vbcppIsCIdentifierLeadChar(ch))
5483	rcExit = vbcppProcessIdentifier(pThis, pStrmInput);
5484	else if (RT_C_IS_DIGIT(ch))
5485	rcExit = vbcppProcessNumber(pThis, pStrmInput, ch);
5486	else
5487	rcExit = vbcppOutputCh(pThis, ch);
5488	}
5489	}
5490	if (rcExit != RTEXITCODE_SUCCESS)
5491	break;
5492	}
5493
5494	/*
5495	* Check for errors.
5496	*/
5497	if (rcExit != RTEXITCODE_SUCCESS)
5498	break;
5499
5500	/*
5501	* Pop the input stack.
5502	*/
5503	PVBCPPINPUT pPopped = pThis->pInputStack;
5504	pThis->pInputStack = pPopped->pUp;
5505	RTMemFree(pPopped);
5506	}
5507
5508	return rcExit;
5509	}
5510
5511
5512	/**
5513	* Opens the input and output streams.
5514	*
5515	* @returns Exit code.
5516	* @param pThis The C preprocessor instance.
5517	*/
5518	static RTEXITCODE vbcppOpenStreams(PVBCPP pThis)
5519	{
5520	const char * const pszInput = pThis->pszInput ? pThis->pszInput : "stdin";
5521	size_t const cchName = strlen(pszInput);
5522	PVBCPPINPUT const pInput = (PVBCPPINPUT)RTMemAlloc(RT_UOFFSETOF_DYN(VBCPPINPUT, szName[cchName + 1]));
5523	if (!pInput)
5524	return vbcppError(pThis, "out of memory");
5525	pInput->pUp = pThis->pInputStack;
5526	pInput->pszSpecified = pInput->szName;
5527	memcpy(pInput->szName, pszInput, cchName + 1);
5528	pThis->pInputStack = pInput;
5529	int rc;
5530	if (pThis->pszInput)
5531	{
5532	rc = ScmStreamInitForReading(&pInput->StrmInput, pThis->pszInput);
5533	if (RT_FAILURE(rc))
5534	return vbcppError(pThis, "ScmStreamInitForReading returned %Rrc when opening and reading in input file (%s)",
5535	rc, pThis->pszInput);
5536	}
5537	else
5538	{
5539	rc = ScmStreamInitForReadingFromStdInput(&pInput->StrmInput);
5540	if (RT_FAILURE(rc))
5541	return vbcppError(pThis, "ScmStreamInitForReadingFromStdInput returned %Rrc", rc);
5542
5543	}
5544
5545	rc = ScmStreamInitForWriting(&pThis->StrmOutput, &pInput->StrmInput);
5546	if (RT_FAILURE(rc))
5547	return vbcppError(pThis, "ScmStreamInitForWriting returned %Rrc", rc);
5548
5549	pThis->fStrmOutputValid = true;
5550	return RTEXITCODE_SUCCESS;
5551	}
5552
5553
5554	/**
5555	* Changes the preprocessing mode.
5556	*
5557	* @param pThis The C preprocessor instance.
5558	* @param enmMode The new mode.
5559	*/
5560	static void vbcppSetMode(PVBCPP pThis, VBCPPMODE enmMode)
5561	{
5562	switch (enmMode)
5563	{
5564	case kVBCppMode_Standard:
5565	pThis->fKeepComments = false;
5566	pThis->fRespectSourceDefines = true;
5567	pThis->fAllowRedefiningCmdLineDefines = true;
5568	pThis->fPassThruDefines = false;
5569	pThis->fUndecidedConditionals = false;
5570	pThis->fPassThruPragmaD = false;
5571	pThis->fPassThruPragmaSTD = true;
5572	pThis->fPassThruPragmaOther = true;
5573	pThis->fPassThruError = false;
5574	pThis->fRemoveDroppedLines = false;
5575	pThis->fLineSplicing = true;
5576	pThis->enmIncludeAction = kVBCppIncludeAction_Include;
5577	break;
5578
5579	case kVBCppMode_Selective:
5580	pThis->fKeepComments = true;
5581	pThis->fRespectSourceDefines = false;
5582	pThis->fAllowRedefiningCmdLineDefines = false;
5583	pThis->fPassThruDefines = true;
5584	pThis->fUndecidedConditionals = true;
5585	pThis->fPassThruPragmaD = true;
5586	pThis->fPassThruPragmaSTD = true;
5587	pThis->fPassThruPragmaOther = true;
5588	pThis->fPassThruError = true;
5589	pThis->fRemoveDroppedLines = true;
5590	pThis->fLineSplicing = false;
5591	pThis->enmIncludeAction = kVBCppIncludeAction_PassThru;
5592	break;
5593
5594	case kVBCppMode_SelectiveD:
5595	pThis->fKeepComments = true;
5596	pThis->fRespectSourceDefines = true;
5597	pThis->fAllowRedefiningCmdLineDefines = false;
5598	pThis->fPassThruDefines = false;
5599	pThis->fUndecidedConditionals = false;
5600	pThis->fPassThruPragmaD = true;
5601	pThis->fPassThruPragmaSTD = false;
5602	pThis->fPassThruPragmaOther = false;
5603	pThis->fPassThruError = false;
5604	pThis->fRemoveDroppedLines = true;
5605	pThis->fLineSplicing = false;
5606	pThis->enmIncludeAction = kVBCppIncludeAction_Drop;
5607	break;
5608
5609	default:
5610	AssertFailedReturnVoid();
5611	}
5612	pThis->enmMode = enmMode;
5613	}
5614
5615
5616	/**
5617	* Parses the command line options.
5618	*
5619	* @returns Program exit code. Exit on non-success or if *pfExit is set.
5620	* @param pThis The C preprocessor instance.
5621	* @param argc The argument count.
5622	* @param argv The argument vector.
5623	* @param pfExit Pointer to the exit indicator.
5624	*/
5625	static RTEXITCODE vbcppParseOptions(PVBCPP pThis, int argc, char *argv, bool pfExit)
5626	{
5627	RTEXITCODE rcExit;
5628
5629	*pfExit = false;
5630
5631	/*
5632	* Option config.
5633	*/
5634	static RTGETOPTDEF const s_aOpts[] =
5635	{
5636	{ "--define", 'D', RTGETOPT_REQ_STRING },
5637	{ "--include-dir", 'I', RTGETOPT_REQ_STRING },
5638	{ "--undefine", 'U', RTGETOPT_REQ_STRING },
5639	{ "--keep-comments", 'C', RTGETOPT_REQ_NOTHING },
5640	{ "--strip-comments", 'c', RTGETOPT_REQ_NOTHING },
5641	{ "--D-strip", 'd', RTGETOPT_REQ_NOTHING },
5642	#define OPT_MODE 1000
5643	{ "--mode", OPT_MODE, RTGETOPT_REQ_STRING },
5644	};
5645
5646	RTGETOPTUNION ValueUnion;
5647	RTGETOPTSTATE GetOptState;
5648	int rc = RTGetOptInit(&GetOptState, argc, argv, &s_aOpts[0], RT_ELEMENTS(s_aOpts), 1, RTGETOPTINIT_FLAGS_OPTS_FIRST);
5649	AssertReleaseRCReturn(rc, RTEXITCODE_FAILURE);
5650
5651	/*
5652	* Process the options.
5653	*/
5654	while ((rc = RTGetOpt(&GetOptState, &ValueUnion)) != 0)
5655	{
5656	switch (rc)
5657	{
5658	case 'c':
5659	pThis->fKeepComments = false;
5660	break;
5661
5662	case 'C':
5663	pThis->fKeepComments = false;
5664	break;
5665
5666	case 'd':
5667	vbcppSetMode(pThis, kVBCppMode_SelectiveD);
5668	break;
5669
5670	case OPT_MODE:
5671	if ( strcmp(ValueUnion.psz, "standard") == 0
5672	\|\| strcmp(ValueUnion.psz, "std") == 0)
5673	vbcppSetMode(pThis, kVBCppMode_Standard);
5674	else if ( strcmp(ValueUnion.psz, "selective") == 0
5675	\|\| strcmp(ValueUnion.psz, "sel") == 0)
5676	vbcppSetMode(pThis, kVBCppMode_Selective);
5677	else if ( strcmp(ValueUnion.psz, "selective-D") == 0
5678	\|\| strcmp(ValueUnion.psz, "D-strip") == 0)
5679	vbcppSetMode(pThis, kVBCppMode_SelectiveD);
5680	else
5681	return RTMsgErrorExit(RTEXITCODE_SYNTAX, "Unknown mode '%s'!", ValueUnion.psz);
5682	break;
5683
5684	case 'D':
5685	{
5686	const char *pszEqual = strchr(ValueUnion.psz, '=');
5687	if (pszEqual)
5688	rcExit = vbcppMacroAdd(pThis, ValueUnion.psz, pszEqual - ValueUnion.psz, pszEqual + 1, RTSTR_MAX, true);
5689	else
5690	rcExit = vbcppMacroAdd(pThis, ValueUnion.psz, RTSTR_MAX, "1", 1, true);
5691	if (rcExit != RTEXITCODE_SUCCESS)
5692	return rcExit;
5693	break;
5694	}
5695
5696	case 'I':
5697	rcExit = vbcppAddInclude(pThis, ValueUnion.psz);
5698	if (rcExit != RTEXITCODE_SUCCESS)
5699	return rcExit;
5700	break;
5701
5702	case 'U':
5703	rcExit = vbcppMacroUndef(pThis, ValueUnion.psz, RTSTR_MAX, true);
5704	if (rcExit != RTEXITCODE_SUCCESS)
5705	return rcExit;
5706	break;
5707
5708	case 'h':
5709	RTPrintf("Usage: VBoxCPP [options] <input.c> [output.ii]\n"
5710	"\n"
5711	"Options:\n"
5712	" --mode={mode}\n"
5713	" Sets the processing mode and asscoiated defaults:\n"
5714	" - selective / sel: (default)\n"
5715	" Selectively applying the defines from the command line\n"
5716	" and preserving the rest.\n"
5717	" - selective-D / D-strip:\n"
5718	" Selectively applying the defines from the command line\n"
5719	" and removing things DTrace doesn't like.\n"
5720	" - standard / std:\n"
5721	" Standard C preprocesing. This is incomplete as, among other\n"
5722	" things, include processing has not yet been implemented.\n"
5723	" --D-strip\n"
5724	" Alias for --mode=selective-D\n"
5725	" --define={macro}[=val], -D{macro}[=val]\n"
5726	" Defines a macro.\n"
5727	" --undefine={macro}, -U{macro}\n"
5728	" Undefines a macro.\n"
5729	" --include-dir={dir}, -I{dir}\n"
5730	" Adds {dir} to the list of include directories that should\n"
5731	" be searched for header files."
5732	" --keep-comments, -C\n"
5733	" Keep comments unchanged in the output.\n"
5734	" --strip-comments, -c\n"
5735	" Strip comments in the output. (default)\n"
5736	"\n"
5737	"This is not a complete C preprocessor implementation (yet), as its use is\n"
5738	"mainly to selectively apply and eliminate defines and/or things are DTrace\n"
5739	"finds problematic. Among the missing features are:\n"
5740	" - Support for ternary expressions.\n"
5741	" - Including header files (in standard mode).\n"
5742	" - +++\n"
5743	);
5744	*pfExit = true;
5745	return RTEXITCODE_SUCCESS;
5746
5747	case 'V':
5748	{
5749	/* The following is assuming that svn does it's job here. */
5750	static const char s_szRev[] = "$Revision: 106061 $";
5751	const char *psz = RTStrStripL(strchr(s_szRev, ' '));
5752	RTPrintf("r%.*s\n", strchr(psz, ' ') - psz, psz);
5753	*pfExit = true;
5754	return RTEXITCODE_SUCCESS;
5755	}
5756
5757	case VINF_GETOPT_NOT_OPTION:
5758	if (!pThis->pszInput)
5759	pThis->pszInput = ValueUnion.psz;
5760	else if (!pThis->pszOutput)
5761	pThis->pszOutput = ValueUnion.psz;
5762	else
5763	return RTMsgErrorExit(RTEXITCODE_SYNTAX, "too many file arguments");
5764	break;
5765
5766
5767	/*
5768	* Errors and bugs.
5769	*/
5770	default:
5771	return RTGetOptPrintError(rc, &ValueUnion);
5772	}
5773	}
5774
5775	return RTEXITCODE_SUCCESS;
5776	}
5777
5778
5779	/**
5780	* Terminates the preprocessor.
5781	*
5782	* This may return failure if an error was delayed.
5783	*
5784	* @returns Exit code.
5785	* @param pThis The C preprocessor instance.
5786	*/
5787	static RTEXITCODE vbcppTerm(PVBCPP pThis)
5788	{
5789	/*
5790	* Flush the output first.
5791	*/
5792	if (pThis->fStrmOutputValid)
5793	{
5794	if (pThis->pszOutput)
5795	{
5796	int rc = ScmStreamWriteToFile(&pThis->StrmOutput, "%s", pThis->pszOutput);
5797	if (RT_FAILURE(rc))
5798	vbcppError(pThis, "ScmStreamWriteToFile failed with %Rrc when writing '%s'", rc, pThis->pszOutput);
5799	}
5800	else
5801	{
5802	int rc = ScmStreamWriteToStdOut(&pThis->StrmOutput);
5803	if (RT_FAILURE(rc))
5804	vbcppError(pThis, "ScmStreamWriteToStdOut failed with %Rrc", rc);
5805	}
5806	}
5807
5808	/*
5809	* Cleanup.
5810	*/
5811	while (pThis->pInputStack)
5812	{
5813	ScmStreamDelete(&pThis->pInputStack->StrmInput);
5814	void *pvFree = pThis->pInputStack;
5815	pThis->pInputStack = pThis->pInputStack->pUp;
5816	RTMemFree(pvFree);
5817	}
5818
5819	ScmStreamDelete(&pThis->StrmOutput);
5820
5821	RTStrSpaceDestroy(&pThis->StrSpace, vbcppMacroFree, NULL);
5822	pThis->StrSpace = NULL;
5823
5824	uint32_t i = pThis->cIncludes;
5825	while (i-- > 0)
5826	RTStrFree(pThis->papszIncludes[i]);
5827	RTMemFree(pThis->papszIncludes);
5828	pThis->papszIncludes = NULL;
5829
5830	return pThis->rcExit;
5831	}
5832
5833
5834	/**
5835	* Initializes the C preprocessor instance data.
5836	*
5837	* @param pThis The C preprocessor instance data.
5838	*/
5839	static void vbcppInit(PVBCPP pThis)
5840	{
5841	vbcppSetMode(pThis, kVBCppMode_Selective);
5842	pThis->cIncludes = 0;
5843	pThis->papszIncludes = NULL;
5844	pThis->pszInput = NULL;
5845	pThis->pszOutput = NULL;
5846	pThis->StrSpace = NULL;
5847	pThis->UndefStrSpace = NULL;
5848	pThis->cCondStackDepth = 0;
5849	pThis->pCondStack = NULL;
5850	pThis->fIf0Mode = false;
5851	pThis->fJustDroppedLine = false;
5852	pThis->fMaybePreprocessorLine = true;
5853	VBCPP_BITMAP_EMPTY(pThis->bmDefined);
5854	pThis->cCondStackDepth = 0;
5855	pThis->pInputStack = NULL;
5856	RT_ZERO(pThis->StrmOutput);
5857	pThis->rcExit = RTEXITCODE_SUCCESS;
5858	pThis->fStrmOutputValid = false;
5859	}
5860
5861
5862
5863	int main(int argc, char **argv)
5864	{
5865	int rc = RTR3InitExe(argc, &argv, 0);
5866	if (RT_FAILURE(rc))
5867	return RTMsgInitFailure(rc);
5868
5869	/*
5870	* Do the job. The code says it all.
5871	*/
5872	VBCPP This;
5873	vbcppInit(&This);
5874	bool fExit;
5875	RTEXITCODE rcExit = vbcppParseOptions(&This, argc, argv, &fExit);
5876	if (!fExit && rcExit == RTEXITCODE_SUCCESS)
5877	{
5878	rcExit = vbcppOpenStreams(&This);
5879	if (rcExit == RTEXITCODE_SUCCESS)
5880	rcExit = vbcppPreprocess(&This);
5881	}
5882
5883	if (rcExit == RTEXITCODE_SUCCESS)
5884	rcExit = vbcppTerm(&This);
5885	else
5886	vbcppTerm(&This);
5887	return rcExit;
5888	}
5889

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source: vbox/trunk/src/bldprogs/VBoxCPP.cpp@ 106724

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