Remove FX_Alloc() null checks now that it can't return NULL.

This permits some functions to become void's since
they, in turn, can't fail.

R=thestig@chromium.org

Review URL: https://codereview.chromium.org/1142713005

8 files changed, 11 insertions, 40 deletions

diff --git a/core/src/fpdfapi/fpdf_edit/fpdf_edit_create.cpp b/core/src/fpdfapi/fpdf_edit/fpdf_edit_create.cpp
index 0886d3ff53..3abbcee046 100644
--- a/core/src/fpdfapi/fpdf_edit/fpdf_edit_create.cpp
+++ b/core/src/fpdfapi/fpdf_edit/fpdf_edit_create.cpp
@@ -415,9 +415,6 @@ FX_BOOL CPDF_Encryptor::Initialize(CPDF_CryptoHandler* pHandler, int objnum, FX_
     }
     m_dwSize = pHandler->EncryptGetSize(objnum, 0, src_data, src_size);
     m_pData = FX_Alloc(FX_BYTE, m_dwSize);
-    if(!m_pData) {
-        return FALSE;
-    }
     pHandler->EncryptContent(objnum, 0, src_data, src_size, m_pData, m_dwSize);
     m_bNewBuf = TRUE;
     return TRUE;
diff --git a/core/src/fpdfapi/fpdf_edit/fpdf_edit_image.cpp b/core/src/fpdfapi/fpdf_edit/fpdf_edit_image.cpp
index 1328fcdf96..a5a91ebc53 100644
--- a/core/src/fpdfapi/fpdf_edit/fpdf_edit_image.cpp
+++ b/core/src/fpdfapi/fpdf_edit/fpdf_edit_image.cpp
@@ -71,17 +71,11 @@ void CPDF_Image::SetJpegImage(IFX_FileRead *pFile)
         dwEstimateSize = 8192;
     }
     FX_LPBYTE pData = FX_Alloc(FX_BYTE, dwEstimateSize);
-    if (!pData) {
-        return;
-    }
     pFile->ReadBlock(pData, 0, dwEstimateSize);
     CPDF_Dictionary *pDict = InitJPEG(pData, dwEstimateSize);
     FX_Free(pData);
     if (!pDict && size > dwEstimateSize) {
         pData = FX_Alloc(FX_BYTE, size);
-        if (!pData) {
-            return;
-        }
         pFile->ReadBlock(pData, 0, size);
         pDict = InitJPEG(pData, size);
         FX_Free(pData);
@@ -223,8 +217,8 @@ void CPDF_Image::SetImage(const CFX_DIBitmap* pBitmap, FX_INT32 iCompress, IFX_F
         } else if (pMaskBitmap->GetFormat() == FXDIB_1bppMask) {
             _JBIG2EncodeBitmap(pMaskDict, pMaskBitmap, m_pDocument, mask_buf, mask_size, TRUE);
         } else {
-            mask_size = maskHeight * maskWidth;
-            mask_buf = FX_Alloc(FX_BYTE, mask_size);
+            mask_buf = FX_Alloc2D(FX_BYTE, maskHeight, maskWidth);
+            mask_size = maskHeight * maskWidth;  // Safe since checked alloc returned.
             for (FX_INT32 a = 0; a < maskHeight; a ++) {
                 FXSYS_memcpy32(mask_buf + a * maskWidth, pMaskBitmap->GetScanline(a), maskWidth);
             }
@@ -306,8 +300,8 @@ void CPDF_Image::SetImage(const CFX_DIBitmap* pBitmap, FX_INT32 iCompress, IFX_F
         }
     } else if (opType == 1) {
         if (!bStream) {
-            dest_size = dest_pitch * BitmapHeight;
-            dest_buf = FX_Alloc(FX_BYTE, dest_size);
+            dest_buf = FX_Alloc2D(FX_BYTE, dest_pitch, BitmapHeight);
+            dest_size = dest_pitch * BitmapHeight;  // Safe since checked alloc returned.
         }
         FX_LPBYTE pDest = dest_buf;
         for (FX_INT32 i = 0; i < BitmapHeight; i ++) {
@@ -321,8 +315,8 @@ void CPDF_Image::SetImage(const CFX_DIBitmap* pBitmap, FX_INT32 iCompress, IFX_F
         }
     } else if (opType == 2) {
         if (!bStream) {
-            dest_size = dest_pitch * BitmapHeight;
-            dest_buf = FX_Alloc(FX_BYTE, dest_size);
+            dest_buf = FX_Alloc2D(FX_BYTE, dest_pitch, BitmapHeight);
+            dest_size = dest_pitch * BitmapHeight;  // Safe since checked alloc returned.
         } else {
             dest_buf = FX_Alloc(FX_BYTE, dest_pitch);
         }
diff --git a/core/src/fpdfapi/fpdf_page/fpdf_page.cpp b/core/src/fpdfapi/fpdf_page/fpdf_page.cpp
index 4ec753d751..5a9f1a8cb8 100644
--- a/core/src/fpdfapi/fpdf_page/fpdf_page.cpp
+++ b/core/src/fpdfapi/fpdf_page/fpdf_page.cpp
@@ -204,11 +204,10 @@ void CPDF_TextObject::CopyData(const CPDF_PageObject* pSrc)
     if (m_nChars > 1) {
         m_pCharCodes = FX_Alloc(FX_DWORD, m_nChars);
         m_pCharPos = FX_Alloc(FX_FLOAT, m_nChars - 1);
-        int i;
-        for (i = 0; i < m_nChars; i ++) {
+        for (int i = 0; i < m_nChars; i ++) {
             m_pCharCodes[i] = pSrcObj->m_pCharCodes[i];
         }
-        for (i = 0; i < m_nChars - 1; i ++) {
+        for (int i = 0; i < m_nChars - 1; i ++) {
             m_pCharPos[i] = pSrcObj->m_pCharPos[i];
         }
     } else {
diff --git a/core/src/fpdfapi/fpdf_page/fpdf_page_parser_old.cpp b/core/src/fpdfapi/fpdf_page/fpdf_page_parser_old.cpp
index 952fe1d9a9..d8b24593ef 100644
--- a/core/src/fpdfapi/fpdf_page/fpdf_page_parser_old.cpp
+++ b/core/src/fpdfapi/fpdf_page/fpdf_page_parser_old.cpp
@@ -262,8 +262,8 @@ FX_DWORD _DecodeAllScanlines(ICodec_ScanlineDecoder* pDecoder, FX_LPBYTE& dest_b
         delete pDecoder;
         return -1;
     }
-    dest_size = pitch * height;
-    dest_buf = FX_Alloc( FX_BYTE, dest_size);
+    dest_buf = FX_Alloc2D(FX_BYTE, pitch, height);
+    dest_size = pitch * height;  // Safe since checked alloc returned.
     for (int row = 0; row < height; row ++) {
         FX_LPBYTE pLine = pDecoder->GetScanline(row);
         if (pLine == NULL) {
@@ -1050,10 +1050,6 @@ void CPDF_ContentParser::Continue(IFX_Pause* pPause)
                         m_Size += size + 1;
                     }
                     m_pData = FX_Alloc(FX_BYTE, m_Size);
-                    if (!m_pData) {
-                        m_Status = Done;
-                        return;
-                    }
                     FX_DWORD pos = 0;
                     for (i = 0; i < m_nStreams; i ++) {
                         FXSYS_memcpy32(m_pData + pos, m_pStreamArray[i]->GetData(), m_pStreamArray[i]->GetSize());
diff --git a/core/src/fpdfapi/fpdf_parser/fpdf_parser_decode.cpp b/core/src/fpdfapi/fpdf_parser/fpdf_parser_decode.cpp
index 8f5871df7f..691981cb10 100644
--- a/core/src/fpdfapi/fpdf_parser/fpdf_parser_decode.cpp
+++ b/core/src/fpdfapi/fpdf_parser/fpdf_parser_decode.cpp
@@ -40,9 +40,6 @@ FX_DWORD _A85Decode(const FX_BYTE* src_buf, FX_DWORD src_size, FX_LPBYTE& dest_b
         return (FX_DWORD) - 1;
     }
     dest_buf = FX_Alloc(FX_BYTE, zcount * 4 + (pos - zcount));
-    if (dest_buf == NULL) {
-        return (FX_DWORD) - 1;
-    }
     int state = 0;
     FX_UINT32 res = 0;
     pos = dest_size = 0;
@@ -153,9 +150,6 @@ FX_DWORD RunLengthDecode(const FX_BYTE* src_buf, FX_DWORD src_size, FX_LPBYTE& d
         return -1;
     }
     dest_buf = FX_Alloc( FX_BYTE, dest_size);
-    if (!dest_buf) {
-        return -1;
-    }
     i = 0;
     int dest_count = 0;
     while (i < src_size) {
diff --git a/core/src/fpdfapi/fpdf_parser/fpdf_parser_objects.cpp b/core/src/fpdfapi/fpdf_parser/fpdf_parser_objects.cpp
index 3eac5ae74e..341be13d44 100644
--- a/core/src/fpdfapi/fpdf_parser/fpdf_parser_objects.cpp
+++ b/core/src/fpdfapi/fpdf_parser/fpdf_parser_objects.cpp
@@ -1086,7 +1086,7 @@ void CPDF_StreamAcc::LoadAllData(const CPDF_Stream* pStream, FX_BOOL bRawAccess,
     }
     if (!pStream->IsMemoryBased()) {
         pSrcData = m_pSrcData = FX_Alloc(FX_BYTE, dwSrcSize);
-        if (!pSrcData || !pStream->ReadRawData(0, pSrcData, dwSrcSize)) {
+        if (!pStream->ReadRawData(0, pSrcData, dwSrcSize)) {
             return;
         }
     } else {
@@ -1165,9 +1165,6 @@ FX_LPBYTE CPDF_StreamAcc::DetachData()
         return p;
     }
     FX_LPBYTE p = FX_Alloc(FX_BYTE, m_dwSize);
-    if (p == NULL) {
-        return NULL;
-    }
     FXSYS_memcpy32(p, m_pData, m_dwSize);
     return p;
 }
diff --git a/core/src/fpdfapi/fpdf_parser/fpdf_parser_parser.cpp b/core/src/fpdfapi/fpdf_parser/fpdf_parser_parser.cpp
index 2772d9825e..0d4ed27c06 100644
--- a/core/src/fpdfapi/fpdf_parser/fpdf_parser_parser.cpp
+++ b/core/src/fpdfapi/fpdf_parser/fpdf_parser_parser.cpp
@@ -2477,9 +2477,6 @@ CPDF_Stream* CPDF_SyntaxParser::ReadStream(CPDF_Dictionary* pDict, PARSE_CONTEXT
     }
     CPDF_Stream* pStream;
     FX_LPBYTE pData = FX_Alloc(FX_BYTE, len);
-    if (!pData) {
-        return NULL;
-    }
     ReadBlock(pData, len);
     if (pCryptoHandler) {
         CFX_BinaryBuf dest_buf;
diff --git a/core/src/fpdfapi/fpdf_render/fpdf_render_loadimage.cpp b/core/src/fpdfapi/fpdf_render/fpdf_render_loadimage.cpp
index 7093edae47..b45d9c3e5d 100644
--- a/core/src/fpdfapi/fpdf_render/fpdf_render_loadimage.cpp
+++ b/core/src/fpdfapi/fpdf_render/fpdf_render_loadimage.cpp
@@ -500,9 +500,6 @@ DIB_COMP_DATA* CPDF_DIBSource::GetDecodeAndMaskArray(FX_BOOL& bDefaultDecode, FX
         return NULL;
     }
     DIB_COMP_DATA* pCompData = FX_Alloc(DIB_COMP_DATA, m_nComponents);
-    if (pCompData == NULL) {
-        return NULL;
-    }
     int max_data = (1 << m_bpc) - 1;
     CPDF_Array* pDecode = m_pDict->GetArray(FX_BSTRC("Decode"));
     if (pDecode) {