shithub: openh264

Download patch

ref: cbe650a3e574e698d48fcdd57d2fe272e5baa166
parent: 4d22d91692d029288c31e00cb3efb8574839d053
parent: 076b1116d644889577353f8eeffce4dd54113667
author: volvet <qizh@cisco.com>
date: Sun Jan 26 17:26:38 EST 2014 

Merge pull request #227 from mstorsjo/snprintf-fixes

Fix handling of snprintf return values and buffer size calculations


--- a/codec/decoder/plus/src/welsDecoderExt.cpp
+++ b/codec/decoder/plus/src/welsDecoderExt.cpp
@@ -90,10 +90,12 @@
   str_t chFileName[1024] = { 0 };  //for .264
   int iBufUsed = 0;
   int iBufLeft = 1023;
+  int iCurUsed;
 
   str_t chFileNameSize[1024] = { 0 }; //for .len
   int iBufUsedSize = 0;
   int iBufLeftSize = 1023;
+  int iCurUsedSize;
 #endif//OUTPUT_BIT_STREAM
 
   m_pTrace = CreateWelsTrace (Wels_Trace_Type);
@@ -106,30 +108,44 @@
 
   WelsGetTimeOfDay (&sCurTime);
 
-  iBufUsed      += WelsSnprintf (chFileName,  iBufLeft,  "bs_0x%p_", (void_t*)this);
-  iBufUsedSize += WelsSnprintf (chFileNameSize, iBufLeftSize, "size_0x%p_", (void_t*)this);
+  iCurUsed     = WelsSnprintf (chFileName,  iBufLeft,  "bs_0x%p_", (void_t*)this);
+  iCurUsedSize = WelsSnprintf (chFileNameSize, iBufLeftSize, "size_0x%p_", (void_t*)this);
 
-  iBufLeft -= iBufUsed;
-  if (iBufLeft > iBufUsed) {
-    iBufUsed += WelsStrftime (&chFileName[iBufUsed], iBufLeft, "%y%m%d%H%M%S", &sCurTime);
-    iBufLeft -= iBufUsed;
+  if (iCurUsed > 0) {
+    iBufUsed += iCurUsed;
+    iBufLeft -= iCurUsed;
   }
+  if (iBufLeft > 0) {
+    iCurUsed = WelsStrftime (&chFileName[iBufUsed], iBufLeft, "%y%m%d%H%M%S", &sCurTime);
+    iBufUsed += iCurUsed;
+    iBufLeft -= iCurUsed;
+  }
 
-  iBufLeftSize -= iBufUsedSize;
-  if (iBufLeftSize > iBufUsedSize) {
-    iBufUsedSize += WelsStrftime (&chFileNameSize[iBufUsedSize], iBufLeftSize, "%y%m%d%H%M%S", &sCurTime);
-    iBufLeftSize -= iBufUsedSize;
+  if (iCurUsedSize > 0) {
+    iBufUsedSize += iCurUsedSize;
+    iBufLeftSize -= iCurUsedSize;
   }
+  if (iBufLeftSize > 0) {
+    iCurUsedSize = WelsStrftime (&chFileNameSize[iBufUsedSize], iBufLeftSize, "%y%m%d%H%M%S", &sCurTime);
+    iBufUsedSize += iCurUsedSize;
+    iBufLeftSize -= iCurUsedSize;
+  }
 
-  if (iBufLeft > iBufUsed) {
-    iBufUsed += WelsSnprintf (&chFileName[iBufUsed], iBufLeft, ".%03.3u.264", WelsGetMillsecond (&sCurTime));
-    iBufLeft -= iBufUsed;
+  if (iBufLeft > 0) {
+    iCurUsed = WelsSnprintf (&chFileName[iBufUsed], iBufLeft, ".%03.3u.264", WelsGetMillsecond (&sCurTime));
+    if (iCurUsed > 0) {
+      iBufUsed += iCurUsed;
+      iBufLeft -= iCurUsed;
+    }
   }
 
-  if (iBufLeftSize > iBufUsedSize) {
-    iBufUsedSize += WelsSnprintf (&chFileNameSize[iBufUsedSize], iBufLeftSize, ".%03.3u.len",
-                                  WelsGetMillsecond (&sCurTime));
-    iBufLeftSize -= iBufUsedSize;
+  if (iBufLeftSize > 0) {
+    iCurUsedSize = WelsSnprintf (&chFileNameSize[iBufUsedSize], iBufLeftSize, ".%03.3u.len",
+                                 WelsGetMillsecond (&sCurTime));
+    if (iCurUsedSize > 0) {
+      iBufUsedSize += iCurUsedSize;
+      iBufLeftSize -= iCurUsedSize;
+    }
   }
 
 
--- a/codec/encoder/core/src/slice_multi_threading.cpp
+++ b/codec/encoder/core/src/slice_multi_threading.cpp
@@ -443,7 +443,6 @@
   while (iIdx < iThreadNum) {
 #if defined(__GNUC__) && !defined(_WIN32)	// for posix threading
     str_t name[SEM_NAME_MAX] = {0};
-    int32_t used_len = 0;
     WELS_THREAD_ERROR_CODE err = 0;
 #endif//__GNUC__
     pSmt->pThreadPEncCtx[iIdx].pWelsPEncCtx	= (void*) (*ppCtx);
@@ -462,8 +461,7 @@
 #if defined(ENABLE_TRACE_MT)
     WelsLog ((*ppCtx), WELS_LOG_INFO, "[MT] Open pUpdateMbListEvent%d named(%s) ret%d err%d\n", iIdx, name, err, errno);
 #endif
-    used_len = SNPRINTF (name, SEM_NAME_MAX, "fu%d%p", iIdx, (void*) (*ppCtx));
-    name[used_len] = '\0';
+    SNPRINTF (name, SEM_NAME_MAX, "fu%d%p", iIdx, (void*) (*ppCtx));
     err = WelsEventOpen (&pSmt->pFinUpdateMbListEvent[iIdx], name);
 #if defined(ENABLE_TRACE_MT)
     WelsLog ((*ppCtx), WELS_LOG_INFO, "[MT] Open pFinUpdateMbListEvent%d named(%s) ret%d err%d\n", iIdx, name, err, errno);
@@ -477,14 +475,12 @@
     WelsEventInit (&pSmt->pFinSliceCodingEvent[iIdx]);
     WelsEventInit (&pSmt->pExitEncodeEvent[iIdx]);
 #else
-    used_len = SNPRINTF (name, SEM_NAME_MAX, "sc%d%p", iIdx, (void*) (*ppCtx));
-    name[used_len] = '\0';
+    SNPRINTF (name, SEM_NAME_MAX, "sc%d%p", iIdx, (void*) (*ppCtx));
     err = WelsEventOpen (&pSmt->pSliceCodedEvent[iIdx], name);
 #if defined(ENABLE_TRACE_MT)
     WelsLog ((*ppCtx), WELS_LOG_INFO, "[MT] Open pSliceCodedEvent%d named(%s) ret%d err%d\n", iIdx, name, err, errno);
 #endif
-    used_len = SNPRINTF (name, SEM_NAME_MAX, "rc%d%p", iIdx, (void*) (*ppCtx));
-    name[used_len] = '\0';
+    SNPRINTF (name, SEM_NAME_MAX, "rc%d%p", iIdx, (void*) (*ppCtx));
     err = WelsEventOpen (&pSmt->pReadySliceCodingEvent[iIdx], name);
 #if defined(ENABLE_TRACE_MT)
     WelsLog ((*ppCtx), WELS_LOG_INFO, "[MT] Open pReadySliceCodingEvent%d = 0x%p named(%s) ret%d err%d\n", iIdx,
@@ -577,19 +573,15 @@
 #endif//DYNAMIC_SLICE_ASSIGN && TRY_SLICING_BALANCE
 #else
     str_t ename[SEM_NAME_MAX] = {0};
-    int32_t used_len = 0;
     // length of semaphore name should be system constrained at least on mac 10.7
     SNPRINTF (ename, SEM_NAME_MAX, "sc%d%p", iIdx, (void*) (*ppCtx));
     WelsEventClose (pSmt->pSliceCodedEvent[iIdx], ename);
-    used_len = SNPRINTF (ename, SEM_NAME_MAX, "rc%d%p", iIdx, (void*) (*ppCtx));
-    ename[used_len] = '\0';
+    SNPRINTF (ename, SEM_NAME_MAX, "rc%d%p", iIdx, (void*) (*ppCtx));
     WelsEventClose (pSmt->pReadySliceCodingEvent[iIdx], ename);
 #if defined(DYNAMIC_SLICE_ASSIGN) && defined(TRY_SLICING_BALANCE)
-    used_len = SNPRINTF (ename, SEM_NAME_MAX, "ud%d%p", iIdx, (void*) (*ppCtx));
-    ename[used_len] = '\0';
+    SNPRINTF (ename, SEM_NAME_MAX, "ud%d%p", iIdx, (void*) (*ppCtx));
     WelsEventClose (pSmt->pUpdateMbListEvent[iIdx], ename);
-    used_len = SNPRINTF (ename, SEM_NAME_MAX, "fu%d%p", iIdx, (void*) (*ppCtx));
-    ename[used_len] = '\0';
+    SNPRINTF (ename, SEM_NAME_MAX, "fu%d%p", iIdx, (void*) (*ppCtx));
     WelsEventClose (pSmt->pFinUpdateMbListEvent[iIdx], ename);
 #endif//DYNAMIC_SLICE_ASSIGN && TRY_SLICING_BALANCE
 #endif//_WIN32
--- a/codec/encoder/plus/src/welsEncoderExt.cpp
+++ b/codec/encoder/plus/src/welsEncoderExt.cpp
@@ -77,10 +77,12 @@
   str_t strStreamFileName[1024] = { 0 };  //for .264
   int32_t iBufferUsed = 0;
   int32_t iBufferLeft = 1023;
+  int32_t iCurUsed;
 
   str_t strLenFileName[1024] = { 0 }; //for .len
   int32_t iBufferUsedSize = 0;
   int32_t iBufferLeftSize = 1023;
+  int32_t iCurUsedSize;
 #endif//OUTPUT_BIT_STREAM
 
 #ifdef OUTPUT_BIT_STREAM
@@ -118,26 +120,29 @@
 #ifdef _WIN32
 #if defined(_MSC_VER)
 #if _MSC_VER>=1500
-  iBufferUsed      += SNPRINTF (strStreamFileName,      iBufferLeft, iBufferLeft,      "enc_bs_0x%p_", (void*)this);
-  iBufferUsedSize += SNPRINTF (strLenFileName, iBufferLeftSize, iBufferLeftSize, "enc_size_0x%p_", (void*)this);
+  iCurUsed      = SNPRINTF (strStreamFileName,      iBufferLeft, iBufferLeft,      "enc_bs_0x%p_", (void*)this);
+  iCurUsedSize  = SNPRINTF (strLenFileName, iBufferLeftSize, iBufferLeftSize, "enc_size_0x%p_", (void*)this);
 #else
-  iBufferUsed      += SNPRINTF (strStreamFileName,      iBufferLeft,      "enc_bs_0x%p_", (void*)this);
-  iBufferUsedSize += SNPRINTF (strLenFileName, iBufferLeftSize, "enc_size_0x%p_", (void*)this);
+  iCurUsed      = SNPRINTF (strStreamFileName,      iBufferLeft,      "enc_bs_0x%p_", (void*)this);
+  iCurUsedSize  = SNPRINTF (strLenFileName, iBufferLeftSize, "enc_size_0x%p_", (void*)this);
 #endif//_MSC_VER>=1500
 #endif//_MSC_VER
 #else
-  iBufferUsed      += SNPRINTF (strStreamFileName,      iBufferLeft,      "/tmp/enc_bs_0x%p_", (void*)this);
-  iBufferUsedSize += SNPRINTF (strLenFileName, iBufferLeftSize, "/tmp/enc_size_0x%p", (void*)this);
+  iCurUsed      = SNPRINTF (strStreamFileName,      iBufferLeft,      "/tmp/enc_bs_0x%p_", (void*)this);
+  iCurUsedSize  = SNPRINTF (strLenFileName, iBufferLeftSize, "/tmp/enc_size_0x%p", (void*)this);
 #endif//WIN32
 
 
-  iBufferLeft -= iBufferUsed;
-  if (iBufferLeft > iBufferUsed) {
+  if (iCurUsed > 0) {
+    iBufferUsed += iCurUsed;
+    iBufferLeft -= iCurUsed;
+  }
+  if (iBufferLeft > 0) {
 #if defined(_GNUC__)
-    iBufferUsed += strftime (&strStreamFileName[iBufferUsed], iBufferLeft, "%y%m%d%H%M%S", tTimeNow);
+    iCurUsed = strftime (&strStreamFileName[iBufferUsed], iBufferLeft, "%y%m%d%H%M%S", tTimeNow);
 #else
 #if defined(_MSC_VER)
-    iBufferUsed += strftime (&strStreamFileName[iBufferUsed], iBufferLeft, "%y%m%d%H%M%S",
+    iCurUsed = strftime (&strStreamFileName[iBufferUsed], iBufferLeft, "%y%m%d%H%M%S",
 #if _MSC_VER>=1500
                              & tTimeNow
 #else
@@ -146,16 +151,20 @@
                             );
 #endif//_MSC_VER
 #endif//__GNUC__
-    iBufferLeft -= iBufferUsed;
+    iBufferUsed += iCurUsed;
+    iBufferLeft -= iCurUsed;
   }
 
-  iBufferLeftSize -= iBufferUsedSize;
-  if (iBufferLeftSize > iBufferUsedSize) {
+  if (iCurUsedSize > 0) {
+    iBufferUsedSize += iCurUsedSize;
+    iBufferLeftSize -= iCurUsedSize;
+  }
+  if (iBufferLeftSize > 0) {
 #if defined(_GNUC__)
-    iBufferUsedSize += strftime (&strLenFileName[iBufferUsedSize], iBufferLeftSize, "%y%m%d%H%M%S", tTimeNow);
+    iCurUsedSize = strftime (&strLenFileName[iBufferUsedSize], iBufferLeftSize, "%y%m%d%H%M%S", tTimeNow);
 #else
 #if defined(_MSC_VER)
-    iBufferUsedSize += strftime (&strLenFileName[iBufferUsedSize], iBufferLeftSize, "%y%m%d%H%M%S",
+    iCurUsedSize = strftime (&strLenFileName[iBufferUsedSize], iBufferLeftSize, "%y%m%d%H%M%S",
 #if _MSC_VER>=1500
                                  & tTimeNow
 #else
@@ -164,38 +173,45 @@
                                 );
 #endif//_MSC_VER
 #endif//__GNUC__
-    iBufferLeftSize -= iBufferUsedSize;
+    iBufferUsedSize += iCurUsedSize;
+    iBufferLeftSize -= iCurUsedSize;
   }
 
-  if (iBufferLeft > iBufferUsed) {
+  if (iBufferLeft > 0) {
 #ifdef _WIN32
 #if defined(_MSC_VER)
 #if _MSC_VER>=1500
-    iBufferUsed += SNPRINTF (&strStreamFileName[iBufferUsed], iBufferLeft, iBufferLeft, ".%03.3u.264", tTimeb.millitm);
+    iCurUsed = SNPRINTF (&strStreamFileName[iBufferUsed], iBufferLeft, iBufferLeft, ".%03.3u.264", tTimeb.millitm);
 #else
-    iBufferUsed += SNPRINTF (&strStreamFileName[iBufferUsed], iBufferLeft, ".%03.3u.264", tTimeb.millitm);
+    iCurUsed = SNPRINTF (&strStreamFileName[iBufferUsed], iBufferLeft, ".%03.3u.264", tTimeb.millitm);
 #endif//_MSC_VER>=1500
 #endif//_MSC_VER
 #else
-    iBufferUsed += SNPRINTF (&strStreamFileName[iBufferUsed], iBufferLeft, ".%03.3u.264", tTimev.tv_usec / 1000);
+    iCurUsed = SNPRINTF (&strStreamFileName[iBufferUsed], iBufferLeft, ".%03.3u.264", tTimev.tv_usec / 1000);
 #endif//WIN32
-    iBufferLeft -= iBufferUsed;
+    if (iCurUsed > 0) {
+      iBufferUsed += iCurUsed;
+      iBufferLeft -= iCurUsed;
+    }
   }
 
-  if (iBufferLeftSize > iBufferUsedSize) {
+  if (iBufferLeftSize > 0) {
 #ifdef _WIN32
 #if defined(_MSC_VER)
 #if _MSC_VER>=1500
-    iBufferUsedSize += SNPRINTF (&strLenFileName[iBufferUsedSize], iBufferLeftSize, iBufferLeftSize, ".%03.3u.len",
+    iCurUsedSize = SNPRINTF (&strLenFileName[iBufferUsedSize], iBufferLeftSize, iBufferLeftSize, ".%03.3u.len",
                                  tTimeb.millitm);
 #else
-    iBufferUsedSize += SNPRINTF (&strLenFileName[iBufferUsedSize], iBufferLeftSize, ".%03.3u.len", tTimeb.millitm);
+    iCurUsedSize = SNPRINTF (&strLenFileName[iBufferUsedSize], iBufferLeftSize, ".%03.3u.len", tTimeb.millitm);
 #endif//_MSC_VER>=1500
 #endif//_MSC_VER
 #else
-    iBufferUsedSize += SNPRINTF (&strLenFileName[iBufferUsedSize], iBufferLeftSize, ".%03.3u.len", tTimev.tv_usec / 1000);
+    iCurUsedSize = SNPRINTF (&strLenFileName[iBufferUsedSize], iBufferLeftSize, ".%03.3u.len", tTimev.tv_usec / 1000);
 #endif//WIN32
-    iBufferLeftSize -= iBufferUsedSize;
+    if (iCurUsedSize > 0) {
+      iBufferUsedSize += iCurUsedSize;
+      iBufferLeftSize -= iCurUsedSize;
+    }
   }
 
 #if defined(__GNUC__)