c7b74b2b12
If the buffer is too small, there's no guarantee that it is null terminated. The docs (on both unix and MSVC) say explicitly that the function returns 0 and the buffer contents are indeterminate in this case.
276 lines
7.2 KiB
C++
276 lines
7.2 KiB
C++
/*!
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* \copy
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* Copyright (c) 2009-2013, Cisco Systems
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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*
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* \file crt_utils_safe_x.cpp
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*
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* \brief common tool/function utilization
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*
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* \date 03/10/2009 Created
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*
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*************************************************************************************
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*/
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#include <string.h>
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#include <stdlib.h>
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#include <math.h>
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#include <time.h>
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#if defined(_WIN32)
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#include <windows.h>
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#include <sys/types.h>
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#include <sys/timeb.h>
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#ifndef _MSC_VER
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#include <sys/time.h>
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#ifndef HAVE_STRNLEN
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#define strnlen(a,b) strlen(a)
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#endif //!HAVE_STRNLEN
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#endif //!_MSC_VER
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#else
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#include <sys/time.h>
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#include <sys/timeb.h>
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#endif //_WIN32
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#include "macros.h"
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#include "crt_util_safe_x.h" // Safe CRT routines like utils for cross platforms
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#if defined(_WIN32) && defined(_MSC_VER)
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#if defined(_MSC_VER) && (_MSC_VER>=1500)
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int32_t WelsSnprintf (str_t* pBuffer, int32_t iSizeOfBuffer, const str_t* kpFormat, ...) {
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va_list pArgPtr;
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int32_t iRc;
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va_start (pArgPtr, kpFormat);
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iRc = vsnprintf_s (pBuffer, iSizeOfBuffer, _TRUNCATE, kpFormat, pArgPtr);
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va_end (pArgPtr);
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return iRc;
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}
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str_t* WelsStrncpy (str_t* pDest, int32_t iSizeInBytes, const str_t* kpSrc, int32_t iCount) {
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strncpy_s (pDest, iSizeInBytes, kpSrc, iCount);
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return pDest;
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}
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int32_t WelsStrnlen (const str_t* kpStr, int32_t iMaxlen) {
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return strnlen_s (kpStr, iMaxlen);
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}
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int32_t WelsVsnprintf (str_t* pBuffer, int32_t iSizeOfBuffer, const str_t* kpFormat, va_list pArgPtr) {
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return vsnprintf_s (pBuffer, iSizeOfBuffer, _TRUNCATE, kpFormat, pArgPtr);
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}
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WelsFileHandle* WelsFopen (const str_t* kpFilename, const str_t* kpMode) {
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WelsFileHandle* pFp = NULL;
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if (fopen_s (&pFp, kpFilename, kpMode) != 0) {
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return NULL;
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}
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return pFp;
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}
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int32_t WelsFclose (WelsFileHandle* pFp) {
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return fclose (pFp);
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}
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int32_t WelsGetTimeOfDay (SWelsTime* pTp) {
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return _ftime_s (pTp);
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}
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int32_t WelsStrftime (str_t* pBuffer, int32_t iSize, const str_t* kpFormat, const SWelsTime* kpTp) {
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struct tm sTimeNow;
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int32_t iRc;
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localtime_s (&sTimeNow, &kpTp->time);
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iRc = strftime (pBuffer, iSize, kpFormat, &sTimeNow);
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if (iRc == 0)
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pBuffer[0] = '\0';
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return iRc;
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}
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#else
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int32_t WelsSnprintf (str_t* pBuffer, int32_t iSizeOfBuffer, const str_t* kpFormat, ...) {
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va_list pArgPtr;
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int32_t iRc;
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va_start (pArgPtr, kpFormat);
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iRc = vsnprintf (pBuffer, iSizeOfBuffer, kpFormat, pArgPtr); //confirmed_safe_unsafe_usage
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if (iRc < 0)
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pBuffer[iSizeOfBuffer - 1] = '\0';
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va_end (pArgPtr);
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return iRc;
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}
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str_t* WelsStrncpy (str_t* pDest, int32_t iSizeInBytes, const str_t* kpSrc, int32_t iCount) {
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strncpy (pDest, kpSrc, iCount); //confirmed_safe_unsafe_usage
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return pDest;
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}
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int32_t WelsStrnlen (const str_t* kpStr, int32_t iMaxlen) {
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return strlen (kpStr); //confirmed_safe_unsafe_usage
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}
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int32_t WelsVsnprintf (str_t* pBuffer, int32_t iSizeOfBuffer, const str_t* kpFormat, va_list pArgPtr) {
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int32_t iRc = vsnprintf (pBuffer, iSizeOfBuffer, kpFormat, pArgPtr); //confirmed_safe_unsafe_usage
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if (iRc < 0)
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pBuffer[iSizeOfBuffer - 1] = '\0';
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return iRc;
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}
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WelsFileHandle* WelsFopen (const str_t* kpFilename, const str_t* kpMode) {
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return fopen (kpFilename, kpMode);
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}
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int32_t WelsFclose (WelsFileHandle* pFp) {
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return fclose (pFp);
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}
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int32_t WelsGetTimeOfDay (SWelsTime* pTp) {
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_ftime (pTp);
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return 0;
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}
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int32_t WelsStrftime (str_t* pBuffer, int32_t iSize, const str_t* kpFormat, const SWelsTime* kpTp) {
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struct tm* pTnow;
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int32_t iRc;
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pTnow = localtime (&kpTp->time);
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iRc = strftime (pBuffer, iSize, kpFormat, pTnow);
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if (iRc == 0)
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pBuffer[0] = '\0';
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return iRc;
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}
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#endif // _MSC_VER
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#else //GCC
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int32_t WelsSnprintf (str_t* pBuffer, int32_t iSizeOfBuffer, const str_t* kpFormat, ...) {
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va_list pArgPtr;
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int32_t iRc;
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va_start (pArgPtr, kpFormat);
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iRc = vsnprintf (pBuffer, iSizeOfBuffer, kpFormat, pArgPtr);
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va_end (pArgPtr);
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return iRc;
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}
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str_t* WelsStrncpy (str_t* pDest, int32_t iSizeInBytes, const str_t* kpSrc, int32_t iCount) {
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return strncpy (pDest, kpSrc, iCount); //confirmed_safe_unsafe_usage
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}
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#if !defined(MACOS) && !defined(UNIX) && !defined(APPLE_IOS)
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int32_t WelsStrnlen (const str_t* kpStr, int32_t iMaxlen) {
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return strnlen (kpStr, iMaxlen); //confirmed_safe_unsafe_usage
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}
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#else
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int32_t WelsStrnlen (const str_t* kpString, int32_t iMaxlen) {
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// In mac os, there is no strnlen in string.h, we can only use strlen instead of strnlen or
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// implement strnlen by ourself
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#if 1
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return strlen (kpString); //confirmed_safe_unsafe_usage
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#else
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const str_t* kpSrc;
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for (kpSrc = kpString; iMaxlen-- && *kpSrc != '\0'; ++kpSrc)
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return kpSrc - kpString;
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#endif
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}
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#endif
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int32_t WelsVsnprintf (str_t* pBuffer, int32_t iSizeOfBuffer, const str_t* kpFormat, va_list pArgPtr) {
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return vsnprintf (pBuffer, iSizeOfBuffer, kpFormat, pArgPtr); //confirmed_safe_unsafe_usage
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}
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WelsFileHandle* WelsFopen (const str_t* kpFilename, const str_t* kpMode) {
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return fopen (kpFilename, kpMode);
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}
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int32_t WelsFclose (WelsFileHandle* pFp) {
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return fclose (pFp);
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}
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int32_t WelsGetTimeOfDay (SWelsTime* pTp) {
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struct timeval sTv;
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if (gettimeofday (&sTv, NULL)) {
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return -1;
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}
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pTp->time = sTv.tv_sec;
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pTp->millitm = (uint16_t)sTv.tv_usec / 1000;
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return 0;
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}
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int32_t WelsStrftime (str_t* pBuffer, int32_t iSize, const str_t* kpFormat, const SWelsTime* kpTp) {
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struct tm* pTnow;
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int32_t iRc;
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pTnow = localtime (&kpTp->time);
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iRc = strftime (pBuffer, iSize, kpFormat, pTnow);
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if (iRc == 0)
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pBuffer[0] = '\0';
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return iRc;
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}
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#endif
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int32_t WelsFwrite (const void_t* kpBuffer, int32_t iSize, int32_t iCount, WelsFileHandle* pFp) {
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return fwrite (kpBuffer, iSize, iCount, pFp);
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}
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uint16_t WelsGetMillsecond (const SWelsTime* kpTp) {
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return kpTp->millitm;
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}
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int32_t WelsFflush (WelsFileHandle* pFp) {
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return fflush (pFp);
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}
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