Remove FX_STRSIZE and replace with size_t

BUG=pdfium:828

Change-Id: I5c40237433ebabaeabdb43aec9cdf783e41dfe16
Reviewed-on: https://pdfium-review.googlesource.com/13230
Reviewed-by: dsinclair <dsinclair@chromium.org>
Commit-Queue: Ryan Harrison <rharrison@chromium.org>

4 files changed, 13 insertions, 11 deletions

diff --git a/core/fxcodec/codec/ccodec_jpegmodule.h b/core/fxcodec/codec/ccodec_jpegmodule.h
index cc59924747..ca561317aa 100644
--- a/core/fxcodec/codec/ccodec_jpegmodule.h
+++ b/core/fxcodec/codec/ccodec_jpegmodule.h
@@ -60,7 +60,7 @@ class CCodec_JpegModule {
 #if _FX_OS_ == _FX_OS_WIN32_ || _FX_OS_ == _FX_OS_WIN64_
   static bool JpegEncode(const RetainPtr<CFX_DIBSource>& pSource,
                          uint8_t** dest_buf,
-                         FX_STRSIZE* dest_size);
+                         size_t* dest_size);
 #endif
 };
 
diff --git a/core/fxcodec/codec/ccodec_pngmodule.cpp b/core/fxcodec/codec/ccodec_pngmodule.cpp
index a08e72f86d..d500745ca7 100644
--- a/core/fxcodec/codec/ccodec_pngmodule.cpp
+++ b/core/fxcodec/codec/ccodec_pngmodule.cpp
@@ -74,7 +74,7 @@ static void _png_load_bmp_attribute(png_structp png_ptr,
 #endif
 #if defined(PNG_TEXT_SUPPORTED)
     int i;
-    FX_STRSIZE len;
+    size_t len;
     const char* buf;
     int num_text;
     png_textp text = nullptr;
@@ -86,8 +86,10 @@ static void _png_load_bmp_attribute(png_structp png_ptr,
         buf = "Author";
         if (!memcmp(buf, text[i].key, std::min(len, FXSYS_strlen(buf)))) {
           pAttribute->m_strAuthor =
-              ByteString(reinterpret_cast<uint8_t*>(text[i].text),
-                         static_cast<FX_STRSIZE>(text[i].text_length));
+              text[i].text_length > 0
+                  ? ByteString(reinterpret_cast<uint8_t*>(text[i].text),
+                               static_cast<size_t>(text[i].text_length))
+                  : ByteString();
         }
       }
     }
diff --git a/core/fxcodec/codec/ccodec_tiffmodule.cpp b/core/fxcodec/codec/ccodec_tiffmodule.cpp
index 07d189200e..f11c480bd7 100644
--- a/core/fxcodec/codec/ccodec_tiffmodule.cpp
+++ b/core/fxcodec/codec/ccodec_tiffmodule.cpp
@@ -81,15 +81,15 @@ void* _TIFFrealloc(void* ptr, tmsize_t size) {
 }
 
 void _TIFFmemset(void* ptr, int val, tmsize_t size) {
-  memset(ptr, val, (size_t)size);
+  memset(ptr, val, static_cast<size_t>(size));
 }
 
 void _TIFFmemcpy(void* des, const void* src, tmsize_t size) {
-  memcpy(des, src, (size_t)size);
+  memcpy(des, src, static_cast<size_t>(size));
 }
 
 int _TIFFmemcmp(const void* ptr1, const void* ptr2, tmsize_t size) {
-  return memcmp(ptr1, ptr2, (size_t)size);
+  return memcmp(ptr1, ptr2, static_cast<size_t>(size));
 }
 
 int _TIFFIfMultiplicationOverflow(tmsize_t op1, tmsize_t op2) {
@@ -201,7 +201,7 @@ void Tiff_Exif_GetStringInfo(TIFF* tif_ctx,
   TIFFGetField(tif_ctx, tag, &buf);
   if (!buf)
     return;
-  FX_STRSIZE size = FXSYS_strlen(buf);
+  size_t size = FXSYS_strlen(buf);
   uint8_t* ptr = FX_Alloc(uint8_t, size + 1);
   memcpy(ptr, buf, size);
   ptr[size] = 0;
diff --git a/core/fxcodec/codec/fx_codec_jpeg.cpp b/core/fxcodec/codec/fx_codec_jpeg.cpp
index b77fc87394..b1dffbb210 100644
--- a/core/fxcodec/codec/fx_codec_jpeg.cpp
+++ b/core/fxcodec/codec/fx_codec_jpeg.cpp
@@ -369,7 +369,7 @@ static void _error_fatal1(j_common_ptr cinfo) {
 }
 
 static void _src_skip_data1(struct jpeg_decompress_struct* cinfo, long num) {
-  if (cinfo->src->bytes_in_buffer < (size_t)num) {
+  if (cinfo->src->bytes_in_buffer < static_cast<size_t>(num)) {
     auto* pContext = reinterpret_cast<CJpegContext*>(cinfo->client_data);
     pContext->m_SkipSize = (unsigned int)(num - cinfo->src->bytes_in_buffer);
     cinfo->src->bytes_in_buffer = 0;
@@ -510,7 +510,7 @@ uint32_t CCodec_JpegModule::GetAvailInput(Context* pContext,
 #define JPEG_BLOCK_SIZE 1048576
 bool CCodec_JpegModule::JpegEncode(const RetainPtr<CFX_DIBSource>& pSource,
                                    uint8_t** dest_buf,
-                                   FX_STRSIZE* dest_size) {
+                                   size_t* dest_size) {
   struct jpeg_error_mgr jerr;
   jerr.error_exit = _error_do_nothing;
   jerr.emit_message = _error_do_nothing1;
@@ -603,7 +603,7 @@ bool CCodec_JpegModule::JpegEncode(const RetainPtr<CFX_DIBSource>& pSource,
   jpeg_finish_compress(&cinfo);
   jpeg_destroy_compress(&cinfo);
   FX_Free(line_buf);
-  *dest_size = dest_buf_length - (FX_STRSIZE)dest.free_in_buffer;
+  *dest_size = dest_buf_length - static_cast<size_t>(dest.free_in_buffer);
 
   return true;
 }