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

6 files changed, 3 insertions, 72 deletions

diff --git a/core/src/fxcodec/codec/fx_codec.cpp b/core/src/fxcodec/codec/fx_codec.cpp
index e8aad711f3..c325cccdd4 100644
--- a/core/src/fxcodec/codec/fx_codec.cpp
+++ b/core/src/fxcodec/codec/fx_codec.cpp
@@ -333,9 +333,6 @@ FX_BOOL CCodec_RLScanlineDecoder::Create(FX_LPCBYTE src_buf, FX_DWORD src_size,
     m_Pitch = (width * nComps * bpc + 31) / 32 * 4;
     m_dwLineBytes = (width * nComps * bpc + 7) / 8;
     m_pScanline = FX_Alloc(FX_BYTE, m_Pitch);
-    if (m_pScanline == NULL) {
-        return FALSE;
-    }
     return CheckDestSize();
 }
 FX_BOOL CCodec_RLScanlineDecoder::v_Rewind()
diff --git a/core/src/fxcodec/codec/fx_codec_fax.cpp b/core/src/fxcodec/codec/fx_codec_fax.cpp
index 33e89e4f92..dc2ee2aacd 100644
--- a/core/src/fxcodec/codec/fx_codec_fax.cpp
+++ b/core/src/fxcodec/codec/fx_codec_fax.cpp
@@ -622,13 +622,7 @@ FX_BOOL CCodec_FaxDecoder::Create(FX_LPCBYTE src_buf, FX_DWORD src_size, int wid
     m_OutputWidth = m_OrigWidth;
     m_OutputHeight = m_OrigHeight;
     m_pScanlineBuf = FX_Alloc(FX_BYTE, m_Pitch);
-    if (m_pScanlineBuf == NULL) {
-        return FALSE;
-    }
     m_pRefBuf = FX_Alloc(FX_BYTE, m_Pitch);
-    if (m_pRefBuf == NULL) {
-        return FALSE;
-    }
     m_pSrcBuf = src_buf;
     m_SrcSize = src_size;
     m_nComps = 1;
@@ -705,9 +699,6 @@ extern "C" {
             pitch = (width + 7) / 8;
         }
         FX_LPBYTE ref_buf = FX_Alloc(FX_BYTE, pitch);
-        if (ref_buf == NULL) {
-            return;
-        }
         FXSYS_memset8(ref_buf, 0xff, pitch);
         int bitpos = *pbitpos;
         for (int iRow = 0; iRow < height; iRow ++) {
@@ -945,9 +936,6 @@ CCodec_FaxEncoder::CCodec_FaxEncoder(FX_LPCBYTE src_buf, int width, int height,
     m_Rows = height;
     m_Pitch = pitch;
     m_pRefLine = FX_Alloc(FX_BYTE, m_Pitch);
-    if (m_pRefLine == NULL) {
-        return;
-    }
     FXSYS_memset8(m_pRefLine, 0xff, m_Pitch);
     m_pLineBuf = FX_Alloc2D(FX_BYTE, m_Pitch, 8);
     m_DestBuf.EstimateSize(0, 10240);
diff --git a/core/src/fxcodec/codec/fx_codec_flate.cpp b/core/src/fxcodec/codec/fx_codec_flate.cpp
index 4d43cc554b..7a19e8b855 100644
--- a/core/src/fxcodec/codec/fx_codec_flate.cpp
+++ b/core/src/fxcodec/codec/fx_codec_flate.cpp
@@ -583,8 +583,8 @@ class CCodec_FlateScanlineDecoder : public CCodec_ScanlineDecoder
 public:
     CCodec_FlateScanlineDecoder();
     ~CCodec_FlateScanlineDecoder();
-    FX_BOOL		Create(FX_LPCBYTE src_buf, FX_DWORD src_size, int width, int height, int nComps, int bpc,
-                       int predictor, int Colors, int BitsPerComponent, int Columns);
+    void Create(FX_LPCBYTE src_buf, FX_DWORD src_size, int width, int height, int nComps, int bpc,
+                int predictor, int Colors, int BitsPerComponent, int Columns);
     virtual void		Destroy()
     {
         delete this;
@@ -630,7 +630,7 @@ CCodec_FlateScanlineDecoder::~CCodec_FlateScanlineDecoder()
         FPDFAPI_FlateEnd(m_pFlate);
     }
 }
-FX_BOOL CCodec_FlateScanlineDecoder::Create(FX_LPCBYTE src_buf, FX_DWORD src_size, int width, int height,
+void CCodec_FlateScanlineDecoder::Create(FX_LPCBYTE src_buf, FX_DWORD src_size, int width, int height,
         int nComps, int bpc, int predictor, int Colors, int BitsPerComponent, int Columns)
 {
     m_SrcBuf = src_buf;
@@ -642,9 +642,6 @@ FX_BOOL CCodec_FlateScanlineDecoder::Create(FX_LPCBYTE src_buf, FX_DWORD src_siz
     m_bColorTransformed = FALSE;
     m_Pitch = (width * nComps * bpc + 7) / 8;
     m_pScanline = FX_Alloc(FX_BYTE, m_Pitch);
-    if (m_pScanline == NULL) {
-        return FALSE;
-    }
     m_Predictor = 0;
     if (predictor) {
         if (predictor >= 10) {
@@ -663,20 +660,10 @@ FX_BOOL CCodec_FlateScanlineDecoder::Create(FX_LPCBYTE src_buf, FX_DWORD src_siz
             m_Columns = Columns;
             m_PredictPitch = (m_BitsPerComponent * m_Colors * m_Columns + 7) / 8;
             m_pLastLine = FX_Alloc(FX_BYTE, m_PredictPitch);
-            if (m_pLastLine == NULL) {
-                return FALSE;
-            }
             m_pPredictRaw = FX_Alloc(FX_BYTE, m_PredictPitch + 1);
-            if (m_pPredictRaw == NULL) {
-                return FALSE;
-            }
             m_pPredictBuffer = FX_Alloc(FX_BYTE, m_PredictPitch);
-            if (m_pPredictBuffer == NULL) {
-                return FALSE;
-            }
         }
     }
-    return TRUE;
 }
 FX_BOOL CCodec_FlateScanlineDecoder::v_Rewind()
 {
@@ -752,8 +739,6 @@ static void FlateUncompress(FX_LPCBYTE src_buf, FX_DWORD src_size, FX_DWORD orig
 
     FX_LPBYTE guess_buf = FX_Alloc(FX_BYTE, guess_size + 1);
     FX_LPBYTE cur_buf = guess_buf;
-    if (!guess_buf)
-        goto fail;
     guess_buf[guess_size] = '\0';
     context = FPDFAPI_FlateInit(my_alloc_func, my_free_func);
     if (!context)
@@ -809,12 +794,6 @@ static void FlateUncompress(FX_LPCBYTE src_buf, FX_DWORD src_size, FX_DWORD orig
             // |avail_buf_size| == 0 case.
             result_tmp_bufs.Add(cur_buf);
             cur_buf = FX_Alloc(FX_BYTE, buf_size + 1);
-            if (!cur_buf) {
-                for (FX_INT32 i = 0; i < result_tmp_bufs.GetSize(); i++) {
-                    FX_Free(result_tmp_bufs[i]);
-                }
-                goto fail;
-            }
             cur_buf[buf_size] = '\0';
         }
         dest_size = FPDFAPI_FlateGetTotalOut(context);
@@ -823,12 +802,6 @@ static void FlateUncompress(FX_LPCBYTE src_buf, FX_DWORD src_size, FX_DWORD orig
             dest_buf = result_tmp_bufs[0];
         } else {
             FX_LPBYTE result_buf = FX_Alloc(FX_BYTE, dest_size);
-            if (!result_buf) {
-                for (FX_INT32 i = 0; i < result_tmp_bufs.GetSize(); i++) {
-                    FX_Free(result_tmp_bufs[i]);
-                }
-                goto fail;
-            }
             FX_DWORD result_pos = 0;
             for (FX_INT32 i = 0; i < result_tmp_bufs.GetSize(); i++) {
                 FX_LPBYTE tmp_buf = result_tmp_bufs[i];
@@ -887,9 +860,6 @@ FX_DWORD CCodec_FlateModule::FlateOrLZWDecode(FX_BOOL bLZW, const FX_BYTE* src_b
         {
             nonstd::unique_ptr<CLZWDecoder> decoder(new CLZWDecoder);
             dest_buf = FX_Alloc( FX_BYTE, dest_size + 1);
-            if (dest_buf == NULL) {
-                return -1;
-            }
             dest_buf[dest_size] = '\0';
             decoder->Decode(dest_buf, dest_size, src_buf, offset, bEarlyChange);
         }
@@ -918,9 +888,6 @@ FX_BOOL CCodec_FlateModule::Encode(const FX_BYTE* src_buf, FX_DWORD src_size,
     }
     FX_LPBYTE pSrcBuf = NULL;
     pSrcBuf = FX_Alloc(FX_BYTE, src_size);
-    if (pSrcBuf == NULL) {
-        return FALSE;
-    }
     FXSYS_memcpy32(pSrcBuf, src_buf, src_size);
     FX_BOOL ret = TRUE;
     if (predictor == 2) {
@@ -939,9 +906,6 @@ FX_BOOL CCodec_FlateModule::Encode(FX_LPCBYTE src_buf, FX_DWORD src_size, FX_LPB
 {
     dest_size = src_size + src_size / 1000 + 12;
     dest_buf = FX_Alloc( FX_BYTE, dest_size);
-    if (dest_buf == NULL) {
-        return FALSE;
-    }
     unsigned long temp_size = dest_size;
     FPDFAPI_FlateCompress(dest_buf, &temp_size, src_buf, src_size);
     dest_size = (FX_DWORD)temp_size;
diff --git a/core/src/fxcodec/codec/fx_codec_icc.cpp b/core/src/fxcodec/codec/fx_codec_icc.cpp
index a984fecc30..26b4c1adfc 100644
--- a/core/src/fxcodec/codec/fx_codec_icc.cpp
+++ b/core/src/fxcodec/codec/fx_codec_icc.cpp
@@ -285,9 +285,6 @@ ICodec_IccModule::IccCS CCodec_IccModule::GetProfileCS(IFX_FileRead* pFile)
     ICodec_IccModule::IccCS cs;
     FX_DWORD dwSize = (FX_DWORD)pFile->GetSize();
     FX_LPBYTE pBuf = FX_Alloc(FX_BYTE, dwSize);
-    if (pBuf == NULL) {
-        return IccCS_Unknown;
-    }
     pFile->ReadBlock(pBuf, 0, dwSize);
     cs = GetProfileCS(pBuf, dwSize);
     FX_Free(pBuf);
@@ -491,9 +488,6 @@ FX_LPVOID CCodec_IccModule::CreateTransform(ICodec_IccModule::IccParam* pInputPa
     CFX_IccTransformCache* pTransformCache;
     if (!m_MapTranform.Lookup(TransformKey, (FX_LPVOID&)pTransformCache)) {
         pCmm = FX_Alloc(CLcmsCmm, 1);
-        if (pCmm == NULL) {
-            return NULL;
-        }
         pCmm->m_nSrcComponents = T_CHANNELS(dwInputProfileType);
         pCmm->m_nDstComponents = T_CHANNELS(dwOutputProfileType);
         pCmm->m_bLab = T_COLORSPACE(pInputParam->dwFormat) == PT_Lab;
diff --git a/core/src/fxcodec/codec/fx_codec_jbig.cpp b/core/src/fxcodec/codec/fx_codec_jbig.cpp
index 278d9cbcf6..8fcd9f4711 100644
--- a/core/src/fxcodec/codec/fx_codec_jbig.cpp
+++ b/core/src/fxcodec/codec/fx_codec_jbig.cpp
@@ -53,9 +53,6 @@ FX_BOOL CCodec_Jbig2Module::Decode(IFX_FileRead* file_ptr,
     CJBig2_Image* dest_image = NULL;
     FX_DWORD src_size = (FX_DWORD)file_ptr->GetSize();
     FX_LPBYTE src_buf = FX_Alloc(FX_BYTE, src_size);
-    if (src_buf == NULL) {
-        return FALSE;
-    }
     int ret = 0;
     if(!file_ptr->ReadBlock(src_buf, 0, src_size)) {
         goto failed;
@@ -133,9 +130,6 @@ FXCODEC_STATUS CCodec_Jbig2Module::StartDecode(void* pJbig2Context, IFX_FileRead
     m_pJbig2Context->m_dest_image = NULL;
     m_pJbig2Context->m_src_size = (FX_DWORD)file_ptr->GetSize();
     m_pJbig2Context->m_src_buf = FX_Alloc(FX_BYTE, m_pJbig2Context->m_src_size);
-    if (m_pJbig2Context->m_src_buf == NULL) {
-        return FXCODEC_STATUS_ERR_MEMORY;
-    }
     int ret = 0;
     if(!file_ptr->ReadBlock((void*)m_pJbig2Context->m_src_buf, 0, m_pJbig2Context->m_src_size)) {
         goto failed;
diff --git a/core/src/fxcodec/codec/fx_codec_jpx_opj.cpp b/core/src/fxcodec/codec/fx_codec_jpx_opj.cpp
index 3546f574f9..1a1616c0a1 100644
--- a/core/src/fxcodec/codec/fx_codec_jpx_opj.cpp
+++ b/core/src/fxcodec/codec/fx_codec_jpx_opj.cpp
@@ -715,14 +715,8 @@ FX_BOOL CJPX_Decoder::Decode(FX_LPBYTE dest_buf, int pitch, FX_BOOL bTranslateCo
     }
     FXSYS_memset8(dest_buf, 0xff, image->y1 * pitch);
     FX_BYTE** channel_bufs = FX_Alloc(FX_BYTE*, image->numcomps);
-    if (channel_bufs == NULL) {
-        return FALSE;
-    }
     FX_BOOL result = FALSE;
     int* adjust_comps = FX_Alloc(int, image->numcomps);
-    if (adjust_comps == NULL) {
-        goto done;
-    }
     for (i = 0; i < (int)image->numcomps; i ++) {
         channel_bufs[i] = dest_buf + offsets[i];
         adjust_comps[i] = image->comps[i].prec - 8;