getopt.h@ 18364

Last change on this file since 18364 was 18187, checked in by vboxsync, 16 years ago
RTGetOpt: Corrected sample code.
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1	/** @file
2	* IPRT - Command Line Parsing.
3	*/
4
5	/*
6	* Copyright (C) 2007 Sun Microsystems, Inc.
7	*
8	* This file is part of VirtualBox Open Source Edition (OSE), as
9	* available from http://www.virtualbox.org. This file is free software;
10	* you can redistribute it and/or modify it under the terms of the GNU
11	* General Public License (GPL) as published by the Free Software
12	* Foundation, in version 2 as it comes in the "COPYING" file of the
13	* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
14	* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
15	*
16	* The contents of this file may alternatively be used under the terms
17	* of the Common Development and Distribution License Version 1.0
18	* (CDDL) only, as it comes in the "COPYING.CDDL" file of the
19	* VirtualBox OSE distribution, in which case the provisions of the
20	* CDDL are applicable instead of those of the GPL.
21	*
22	* You may elect to license modified versions of this file under the
23	* terms and conditions of either the GPL or the CDDL or both.
24	*
25	* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa
26	* Clara, CA 95054 USA or visit http://www.sun.com if you need
27	* additional information or have any questions.
28	*/
29
30	#ifndef ___iprt_getopt_h
31	#define ___iprt_getopt_h
32
33
34	#include <iprt/cdefs.h>
35	#include <iprt/types.h>
36
37	__BEGIN_DECLS
38
39	/** @defgroup grp_rt_getopt RTGetOpt - Command Line Parsing
40	* @ingroup grp_rt
41	* @{
42	*/
43
44	/** @name RTGETOPTDEF::fFlags
45	*
46	* @remarks When neither of the RTGETOPT_FLAG_HEX, RTGETOPT_FLAG_OCT and RTGETOPT_FLAG_DEC
47	* flags are specified with a integer value format, RTGetOpt will default to
48	* decimal but recognize the 0x prefix when present. RTGetOpt will not look for
49	* for the octal prefix (0).
50	* @{ */
51	/** Requires no extra argument.
52	* (Can be assumed to be 0 for ever.) */
53	#define RTGETOPT_REQ_NOTHING 0
54	/** A value is required or error will be returned. */
55	#define RTGETOPT_REQ_STRING 1
56	/** The value must be a valid signed 8-bit integer or an error will be returned. */
57	#define RTGETOPT_REQ_INT8 2
58	/** The value must be a valid unsigned 8-bit integer or an error will be returned. */
59	#define RTGETOPT_REQ_UINT8 3
60	/** The value must be a valid signed 16-bit integer or an error will be returned. */
61	#define RTGETOPT_REQ_INT16 4
62	/** The value must be a valid unsigned 16-bit integer or an error will be returned. */
63	#define RTGETOPT_REQ_UINT16 5
64	/** The value must be a valid signed 32-bit integer or an error will be returned. */
65	#define RTGETOPT_REQ_INT32 6
66	/** The value must be a valid unsigned 32-bit integer or an error will be returned. */
67	#define RTGETOPT_REQ_UINT32 7
68	/** The value must be a valid signed 64-bit integer or an error will be returned. */
69	#define RTGETOPT_REQ_INT64 8
70	/** The value must be a valid unsigned 64-bit integer or an error will be returned. */
71	#define RTGETOPT_REQ_UINT64 9
72	/** The value must be a valid IPv4 address.
73	* (Not a name, but 4 values in the 0..255 range with dots separating them). */
74	#define RTGETOPT_REQ_IPV4ADDR 10
75	#if 0
76	/** The value must be a valid IPv4 CIDR.
77	* As with RTGETOPT_REQ_IPV4ADDR, no name.
78	* @todo Mix CIDR with types.h or/and net.h first and find a way to make the
79	* mask optional like with ifconfig. See RTCidrStrToIPv4. */
80	#define RTGETOPT_REQ_IPV4CIDR 11
81	#endif
82	/** The value must be a valid ethernet MAC address. */
83	#define RTGETOPT_REQ_MACADDR 14
84	/** The mask of the valid required types. */
85	#define RTGETOPT_REQ_MASK 15
86	/** Treat the value as hexadecimal - only applicable with the RTGETOPT_REQ_INT. */
87	#define RTGETOPT_FLAG_HEX RT_BIT(16)
88	/** Treat the value as octal - only applicable with the RTGETOPT_REQ_INT. */
89	#define RTGETOPT_FLAG_OCT RT_BIT(17)
90	/** Treat the value as decimal - only applicable with the RTGETOPT_REQ_INT. */
91	#define RTGETOPT_FLAG_DEC RT_BIT(18)
92	/** Mask of valid bits - for validation. */
93	#define RTGETOPT_VALID_MASK ( RTGETOPT_REQ_MASK \| RTGETOPT_FLAG_HEX \| RTGETOPT_FLAG_OCT \| RTGETOPT_FLAG_DEC )
94	/** @} */
95
96	/**
97	* An option definition.
98	*/
99	typedef struct RTGETOPTDEF
100	{
101	/** The long option.
102	* This is optional */
103	const char *pszLong;
104	/** The short option character.
105	* This doesn't have to be a character, it may also be a \#define or enum value if
106	* there isn't any short version of this option. */
107	int iShort;
108	/** The flags (RTGETOPT_). /
109	unsigned fFlags;
110	} RTGETOPTDEF;
111	/** Pointer to an option definition. */
112	typedef RTGETOPTDEF *PRTGETOPTDEF;
113	/** Pointer to an const option definition. */
114	typedef const RTGETOPTDEF *PCRTGETOPTDEF;
115
116	/**
117	* Option argument union.
118	*
119	* What ends up here depends on argument format in the option definition.
120	*
121	* @remarks Integers will bet put in the \a i and \a u members and sign/zero extended
122	* according to the signedness indicated by the \a fFlags. So, you can choose
123	* use which ever of the integer members for accessing the value regardless
124	* of restrictions indicated in the \a fFlags.
125	*/
126	typedef union RTGETOPTUNION
127	{
128	/** Pointer to the definition on failure or when the option doesn't take an argument.
129	* This can be NULL for some errors. */
130	PCRTGETOPTDEF pDef;
131	/** A RTGETOPT_REQ_STRING option argument. */
132	const char *psz;
133
134	#if !defined(RT_ARCH_AMD64) && !defined(RT_ARCH_X86)
135	# error "PORTME: big-endian systems will need to fix the layout here to get the next two fields working right"
136	#endif
137
138	/** A RTGETOPT_REQ_INT8 option argument. */
139	int8_t i8;
140	/** A RTGETOPT_REQ_UINT8 option argument . */
141	uint8_t u8;
142	/** A RTGETOPT_REQ_INT16 option argument. */
143	int16_t i16;
144	/** A RTGETOPT_REQ_UINT16 option argument . */
145	uint16_t u16;
146	/** A RTGETOPT_REQ_INT16 option argument. */
147	int32_t i32;
148	/** A RTGETOPT_REQ_UINT32 option argument . */
149	uint32_t u32;
150	/** A RTGETOPT_REQ_INT64 option argument. */
151	int64_t i64;
152	/** A RTGETOPT_REQ_UINT64 option argument. */
153	uint64_t u64;
154	#ifdef ___iprt_net_h
155	/** A RTGETOPT_REQ_IPV4ADDR option argument. */
156	RTNETADDRIPV4 IPv4Addr;
157	#endif
158	/** A RTGETOPT_REQ_MACADDR option argument. */
159	RTMAC MacAddr;
160	/** A signed integer value. */
161	int64_t i;
162	/** An unsigned integer value. */
163	uint64_t u;
164	} RTGETOPTUNION;
165	/** Pointer to an option argument union. */
166	typedef RTGETOPTUNION *PRTGETOPTUNION;
167	/** Pointer to a const option argument union. */
168	typedef RTGETOPTUNION const *PCRTGETOPTUNION;
169
170
171	/**
172	* RTGetOpt state.
173	*/
174	typedef struct RTGETOPTSTATE
175	{
176	/** The next argument. */
177	int iNext;
178	/** Argument array. */
179	char **argv;
180	/** Number of items in argv. */
181	int argc;
182	/** Option definition array. */
183	PCRTGETOPTDEF paOptions;
184	/** Number of items in paOptions. */
185	size_t cOptions;
186	/** The next short option.
187	* (For parsing ls -latrT4 kind of option lists.) */
188	const char *pszNextShort;
189	/* More members will be added later for dealing with initial
190	call, optional sorting, '--' and so on. */
191	} RTGETOPTSTATE;
192	/** Pointer to RTGetOpt state. */
193	typedef RTGETOPTSTATE *PRTGETOPTSTATE;
194
195
196	/**
197	* Initialize the RTGetOpt state.
198	*
199	* The passed in argument vector may be sorted if fFlags indicates that this is
200	* desired (to be implemented).
201	*
202	* @returns VINF_SUCCESS, VERR_INVALID_PARAMETER or VERR_INVALID_POINTER.
203	* @param pState The state.
204	*
205	* @param argc Argument count, to be copied from what comes in with
206	* main().
207	* @param argv Argument array, to be copied from what comes in with
208	* main(). This may end up being modified by the
209	* option/argument sorting.
210	* @param paOptions Array of RTGETOPTDEF structures, which must specify what
211	* options are understood by the program.
212	* @param cOptions Number of array items passed in with paOptions.
213	* @param iFirst The argument to start with (in argv).
214	* @param fFlags The flags. MBZ for now.
215	*/
216	RTDECL(int) RTGetOptInit(PRTGETOPTSTATE pState, int argc, char **argv,
217	PCRTGETOPTDEF paOptions, size_t cOptions,
218	int iFirst, uint32_t fFlags);
219
220	/**
221	* Command line argument parser, handling both long and short options and checking
222	* argument formats, if desired.
223	*
224	* This is to be called in a loop until it returns 0 (meaning that all options
225	* were parsed) or a negative value (meaning that an error occured). How non-option
226	* arguments are dealt with depends on the flags passed to RTGetOptInit. The default
227	* (fFlags = 0) is to return VINF_GETOPT_NOT_OPTION with pValueUnion->psz pointing to
228	* the argument string.
229	*
230	* For example, for a program which takes the following options:
231	*
232	* --optwithstring (or -s) and a string argument;
233	* --optwithint (or -i) and a 32-bit signed integer argument;
234	* --verbose (or -v) with no arguments,
235	*
236	* code would look something like this:
237	*
238	* @code
239	int main(int argc, char **argv)
240	{
241	RTR3Init();
242
243	static const RTGETOPTDEF s_aOptions[] =
244	{
245	{ "--optwithstring", 's', RTGETOPT_REQ_STRING },
246	{ "--optwithint", 'i', RTGETOPT_REQ_INT32 },
247	{ "--verbose", 'v', 0 },
248	};
249
250	int ch;
251	int i = 1;
252	RTGETOPTUNION ValueUnion;
253	RTGETOPTSTATE GetState;
254	RTGetOptInit(&GetState, argc, argv, s_aOptions, RT_ELEMENTS(s_aOptions), 1, 0);
255	while ((ch = RTGetOpt(&GetState, &ValueUnion)))
256	{
257	// for options that require an argument, ValueUnion has received the value
258	switch (ch)
259	{
260	case 's': // --optwithstring or -s
261	// string argument, copy ValueUnion.psz
262	break;
263
264	case 'i': // --optwithint or -i
265	// integer argument, copy ValueUnion.i32
266	break;
267
268	case 'v': // --verbose or -v
269	g_fOptVerbose = true;
270	break;
271
272	case VINF_GETOPT_NOT_OPTION:
273	// handle non-option argument in ValueUnion.psz.
274	break;
275
276	default:
277	if (ch > 0)
278	{
279	if (RT_C_IS_GRAPH(ch))
280	Error("unhandled option: -%c\n", ch);
281	else
282	Error("unhandled option: %i\n", ch);
283	}
284	else if (ch == VERR_GETOPT_UNKNOWN_OPTION)
285	Error("unknown option: %s\n", ValueUnion.psz);
286	else if (ValueUnion.pDef)
287	Error("%s: %Rrs\n", ValueUnion.pDef->pszLong, ch);
288	else
289	Error("%Rrs\n", ch);
290	return 1;
291	}
292	}
293
294	return 0;
295	}
296	@endcode
297	*
298	* @returns 0 when done parsing.
299	* @returns IPRT error status on parse error.
300	* @returns VINF_GETOPT_NOT_OPTION when encountering a non-option argument and
301	* RTGETOPT_FLAG_SORT was not specified. pValueUnion->psz points to the
302	* argument string.
303	* @returns VERR_GETOPT_UNKNOWN_OPTION when encountering an unknown option.
304	* pValueUnion->psz points to the option string.
305	* @returns VERR_GETOPT_REQUIRED_ARGUMENT_MISSING and pValueUnion->pDef if
306	* a required argument (aka value) was missing for an option.
307	* @returns VERR_GETOPT_INVALID_ARGUMENT_FORMAT and pValueUnion->pDef if
308	* argument (aka value) conversion failed.
309	*
310	* @param pState The state previously initialized with RTGetOptInit.
311	* @param pValueUnion Union with value; in the event of an error, psz member
312	* points to erroneous parameter; otherwise, for options
313	* that require an argument, this contains the value of
314	* that argument, depending on the type that is required.
315	*/
316	RTDECL(int) RTGetOpt(PRTGETOPTSTATE pState, PRTGETOPTUNION pValueUnion);
317
318	/** @} */
319
320	__END_DECLS
321
322	#endif
323

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source: vbox/trunk/include/iprt/getopt.h@ 18364

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