1 | /* $Id: strprintf.cpp 1 1970-01-01 00:00:00Z vboxsync $ */
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2 | /** @file
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3 | * InnoTek Portable Runtime - String Formatters.
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4 | */
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5 |
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6 | /*
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7 | * Copyright (C) 2006 InnoTek Systemberatung GmbH
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8 | *
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9 | * This file is part of VirtualBox Open Source Edition (OSE), as
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10 | * available from http://www.virtualbox.org. This file is free software;
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11 | * you can redistribute it and/or modify it under the terms of the GNU
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12 | * General Public License as published by the Free Software Foundation,
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13 | * in version 2 as it comes in the "COPYING" file of the VirtualBox OSE
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14 | * distribution. VirtualBox OSE is distributed in the hope that it will
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15 | * be useful, but WITHOUT ANY WARRANTY of any kind.
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16 | *
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17 | * If you received this file as part of a commercial VirtualBox
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18 | * distribution, then only the terms of your commercial VirtualBox
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19 | * license agreement apply instead of the previous paragraph.
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20 | */
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21 |
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22 |
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23 | /*******************************************************************************
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24 | * Header Files *
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25 | *******************************************************************************/
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26 | #include <iprt/string.h>
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27 | #include <iprt/assert.h>
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28 |
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29 |
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30 | /*******************************************************************************
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31 | * Structures and Typedefs *
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32 | *******************************************************************************/
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33 | /** strbufoutput() argument structure. */
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34 | typedef struct STRBUFARG
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35 | {
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36 | /** Pointer to current buffer position. */
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37 | char *psz;
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38 | /** Number of bytes left in the buffer - not including the trailing zero. */
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39 | size_t cch;
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40 | } STRBUFARG;
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41 | /** Pointer to a strbufoutput() argument structure. */
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42 | typedef STRBUFARG *PSTRBUFARG;
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43 |
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44 |
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45 | /*******************************************************************************
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46 | * Internal Functions *
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47 | *******************************************************************************/
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48 | static DECLCALLBACK(size_t) strbufoutput(void *pvArg, const char *pachChars, size_t cbChars);
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49 |
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50 |
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51 | /**
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52 | * Output callback.
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53 | *
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54 | * @returns number of bytes written.
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55 | * @param pvArg Pointer to a STRBUFARG structure.
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56 | * @param pachChars Pointer to an array of utf-8 characters.
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57 | * @param cbChars Number of bytes in the character array pointed to by pachChars.
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58 | */
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59 | static DECLCALLBACK(size_t) strbufoutput(void *pvArg, const char *pachChars, size_t cbChars)
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60 | {
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61 | PSTRBUFARG pArg = (PSTRBUFARG)pvArg;
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62 |
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63 | cbChars = RT_MIN(pArg->cch, cbChars);
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64 | if (cbChars)
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65 | {
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66 | memcpy(pArg->psz, pachChars, cbChars);
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67 | pArg->cch -= cbChars;
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68 | pArg->psz += cbChars;
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69 | }
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70 | *pArg->psz = '\0';
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71 |
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72 | return cbChars;
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73 | }
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74 |
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75 |
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76 | RTDECL(size_t) RTStrPrintfExV(PFNSTRFORMAT pfnFormat, void *pvArg, char *pszBuffer, size_t cchBuffer, const char *pszFormat, va_list args)
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77 | {
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78 | if (!cchBuffer)
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79 | {
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80 | AssertMsgFailed(("Excellent idea! Format a string with no space for the output!\n"));
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81 | return 0;
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82 | }
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83 |
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84 | STRBUFARG Arg;
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85 | Arg.psz = pszBuffer;
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86 | Arg.cch = cchBuffer - 1;
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87 | return RTStrFormatV(strbufoutput, &Arg, pfnFormat, pvArg, pszFormat, args);
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88 | }
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89 |
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90 |
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91 | RTDECL(size_t) RTStrPrintfV(char *pszBuffer, size_t cchBuffer, const char *pszFormat, va_list args)
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92 | {
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93 | return RTStrPrintfExV(NULL, NULL, pszBuffer, cchBuffer, pszFormat, args);
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94 | }
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95 |
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96 | RTDECL(size_t) RTStrPrintfEx(PFNSTRFORMAT pfnFormat, void *pvArg, char *pszBuffer, size_t cchBuffer, const char *pszFormat, ...)
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97 | {
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98 | va_list args;
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99 | va_start(args, pszFormat);
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100 | size_t cbRet = RTStrPrintfExV(pfnFormat, pvArg, pszBuffer, cchBuffer, pszFormat, args);
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101 | va_end(args);
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102 | return cbRet;
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103 | }
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104 |
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105 | RTDECL(size_t) RTStrPrintf(char *pszBuffer, size_t cchBuffer, const char *pszFormat, ...)
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106 | {
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107 | va_list args;
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108 | va_start(args, pszFormat);
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109 | size_t cbRet = RTStrPrintfV(pszBuffer, cchBuffer, pszFormat, args);
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110 | va_end(args);
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111 | return cbRet;
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112 | }
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113 |
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