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Diffstat (limited to '')
| -rw-r--r-- | src/VBox/Runtime/common/string/strprintf.cpp | 149 |
1 files changed, 149 insertions, 0 deletions
diff --git a/src/VBox/Runtime/common/string/strprintf.cpp b/src/VBox/Runtime/common/string/strprintf.cpp new file mode 100644 index 00000000..df56ada9 --- /dev/null +++ b/src/VBox/Runtime/common/string/strprintf.cpp @@ -0,0 +1,149 @@ +/* $Id: strprintf.cpp $ */ +/** @file + * IPRT - String Formatters. + */ + +/* + * Copyright (C) 2006-2019 Oracle Corporation + * + * This file is part of VirtualBox Open Source Edition (OSE), as + * available from http://www.virtualbox.org. This file is free software; + * you can redistribute it and/or modify it under the terms of the GNU + * General Public License (GPL) as published by the Free Software + * Foundation, in version 2 as it comes in the "COPYING" file of the + * VirtualBox OSE distribution. VirtualBox OSE is distributed in the + * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind. + * + * The contents of this file may alternatively be used under the terms + * of the Common Development and Distribution License Version 1.0 + * (CDDL) only, as it comes in the "COPYING.CDDL" file of the + * VirtualBox OSE distribution, in which case the provisions of the + * CDDL are applicable instead of those of the GPL. + * + * You may elect to license modified versions of this file under the + * terms and conditions of either the GPL or the CDDL or both. + */ + + +/********************************************************************************************************************************* +* Header Files * +*********************************************************************************************************************************/ +#include <iprt/string.h> +#include "internal/iprt.h" + +#include <iprt/assert.h> + + +/********************************************************************************************************************************* +* Structures and Typedefs * +*********************************************************************************************************************************/ +/** strbufoutput() argument structure. */ +typedef struct STRBUFARG +{ + /** Pointer to current buffer position. */ + char *psz; + /** Number of bytes left in the buffer - not including the trailing zero. */ + size_t cch; +} STRBUFARG; +/** Pointer to a strbufoutput() argument structure. */ +typedef STRBUFARG *PSTRBUFARG; + + +/********************************************************************************************************************************* +* Internal Functions * +*********************************************************************************************************************************/ +static DECLCALLBACK(size_t) strbufoutput(void *pvArg, const char *pachChars, size_t cbChars); + + +/** + * Output callback. + * + * @returns number of bytes written. + * @param pvArg Pointer to a STRBUFARG structure. + * @param pachChars Pointer to an array of utf-8 characters. + * @param cbChars Number of bytes in the character array pointed to by pachChars. + */ +static DECLCALLBACK(size_t) strbufoutput(void *pvArg, const char *pachChars, size_t cbChars) +{ + PSTRBUFARG pArg = (PSTRBUFARG)pvArg; + char *pszCur = pArg->psz; /* We actually have to spell this out for VS2010, or it will load for each case. */ + + cbChars = RT_MIN(pArg->cch, cbChars); + if (cbChars) + { + pArg->cch -= cbChars; + + /* Note! For VS2010/64 we need at least 7 case statements before it generates a jump table. */ + switch (cbChars) + { + default: + memcpy(pszCur, pachChars, cbChars); + break; + case 8: pszCur[7] = pachChars[7]; RT_FALL_THRU(); + case 7: pszCur[6] = pachChars[6]; RT_FALL_THRU(); + case 6: pszCur[5] = pachChars[5]; RT_FALL_THRU(); + case 5: pszCur[4] = pachChars[4]; RT_FALL_THRU(); + case 4: pszCur[3] = pachChars[3]; RT_FALL_THRU(); + case 3: pszCur[2] = pachChars[2]; RT_FALL_THRU(); + case 2: pszCur[1] = pachChars[1]; RT_FALL_THRU(); + case 1: pszCur[0] = pachChars[0]; RT_FALL_THRU(); + case 0: + break; + } + pArg->psz = pszCur += cbChars; + } + *pszCur = '\0'; + + return cbChars; +} + + +RTDECL(size_t) RTStrPrintf(char *pszBuffer, size_t cchBuffer, const char *pszFormat, ...) +{ + /* Explicitly inline RTStrPrintfV + RTStrPrintfExV here because this is a frequently use API. */ + STRBUFARG Arg; + va_list args; + size_t cbRet; + + AssertMsgReturn(cchBuffer, ("Excellent idea! Format a string with no space for the output!\n"), 0); + Arg.psz = pszBuffer; + Arg.cch = cchBuffer - 1; + + va_start(args, pszFormat); + cbRet = RTStrFormatV(strbufoutput, &Arg, NULL, NULL, pszFormat, args); + va_end(args); + + return cbRet; +} +RT_EXPORT_SYMBOL(RTStrPrintf); + + +RTDECL(size_t) RTStrPrintfExV(PFNSTRFORMAT pfnFormat, void *pvArg, char *pszBuffer, size_t cchBuffer, const char *pszFormat, va_list args) +{ + STRBUFARG Arg; + AssertMsgReturn(cchBuffer, ("Excellent idea! Format a string with no space for the output!\n"), 0); + Arg.psz = pszBuffer; + Arg.cch = cchBuffer - 1; + return RTStrFormatV(strbufoutput, &Arg, pfnFormat, pvArg, pszFormat, args); +} +RT_EXPORT_SYMBOL(RTStrPrintfExV); + + +RTDECL(size_t) RTStrPrintfV(char *pszBuffer, size_t cchBuffer, const char *pszFormat, va_list args) +{ + return RTStrPrintfExV(NULL, NULL, pszBuffer, cchBuffer, pszFormat, args); +} +RT_EXPORT_SYMBOL(RTStrPrintfV); + + +RTDECL(size_t) RTStrPrintfEx(PFNSTRFORMAT pfnFormat, void *pvArg, char *pszBuffer, size_t cchBuffer, const char *pszFormat, ...) +{ + va_list args; + size_t cbRet; + va_start(args, pszFormat); + cbRet = RTStrPrintfExV(pfnFormat, pvArg, pszBuffer, cchBuffer, pszFormat, args); + va_end(args); + return cbRet; +} +RT_EXPORT_SYMBOL(RTStrPrintfEx); + |