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dwebp/WritePNG: mark png variables volatile

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these are used on both sides of the setjmp().

Change-Id: I4a789bfb3a5d56946a22286c5a140008d90e1ba2
This commit is contained in:
James Zern
2015-01-16 15:39:24 -08:00
parent 775dfad297
commit 7a191398ca
1 changed files with 5 additions and 5 deletions
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10
examples/dwebp.c
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@@ -193,8 +193,8 @@ static int WritePNG(FILE* out_file, const WebPDecBuffer* const buffer) {
uint8_t* const rgb = buffer->u.RGBA.rgba; uint8_t* const rgb = buffer->u.RGBA.rgba;
const int stride = buffer->u.RGBA.stride; const int stride = buffer->u.RGBA.stride;
const int has_alpha = (buffer->colorspace == MODE_RGBA); const int has_alpha = (buffer->colorspace == MODE_RGBA);
png_structp png; volatile png_structp png;
png_infop info; volatile png_infop info;
png_uint_32 y; png_uint_32 y;
png = png_create_write_struct(PNG_LIBPNG_VER_STRING, png = png_create_write_struct(PNG_LIBPNG_VER_STRING,
@@ -204,11 +204,11 @@ static int WritePNG(FILE* out_file, const WebPDecBuffer* const buffer) {
} }
info = png_create_info_struct(png); info = png_create_info_struct(png);
if (info == NULL) { if (info == NULL) {
png_destroy_write_struct(&png, NULL); png_destroy_write_struct((png_structpp)&png, NULL);
return 0; return 0;
} }
if (setjmp(png_jmpbuf(png))) { if (setjmp(png_jmpbuf(png))) {
png_destroy_write_struct(&png, &info); png_destroy_write_struct((png_structpp)&png, (png_infopp)&info);
return 0; return 0;
} }
png_init_io(png, out_file); png_init_io(png, out_file);
@@ -222,7 +222,7 @@ static int WritePNG(FILE* out_file, const WebPDecBuffer* const buffer) {
png_write_rows(png, &row, 1); png_write_rows(png, &row, 1);
} }
png_write_end(png, info); png_write_end(png, info);
png_destroy_write_struct(&png, &info); png_destroy_write_struct((png_structpp)&png, (png_infopp)&info);
return 1; return 1;
} }
#else // !HAVE_WINCODEC_H && !WEBP_HAVE_PNG #else // !HAVE_WINCODEC_H && !WEBP_HAVE_PNG