diff options
Diffstat (limited to 'tools/gfx.c')
| -rw-r--r-- | tools/gfx.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/tools/gfx.c b/tools/gfx.c index 3e5624e95..8c4066ab3 100644 --- a/tools/gfx.c +++ b/tools/gfx.c @@ -230,8 +230,13 @@ int png_get_width(char *filename) { const int OFFSET_WIDTH = 16; uint8_t bytes[4]; fseek(f, OFFSET_WIDTH, SEEK_SET); - fread(bytes, 1, 4, f); + size_t size = 4; + size_t result = fread(bytes, 1, size, f); fclose(f); + if (result != size) { + fprintf(stderr, "Could not read file at offset 0x%x: \"%s\"\n", OFFSET_WIDTH, filename); + exit(1); + } int width = 0; for (int i = 0; i < 4; i++) { |