ExifHeader       3223 ext/exif/exif.c 	static const uchar ExifHeader[] = {0x45, 0x78, 0x69, 0x66, 0x00, 0x00};
ExifHeader       3224 ext/exif/exif.c 	if (length <= 8 || memcmp(CharBuf+2, ExifHeader, 6)) {