diff options
Diffstat (limited to 'third_party/libtiff/tiffiop.h')
| -rw-r--r-- | third_party/libtiff/tiffiop.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/third_party/libtiff/tiffiop.h b/third_party/libtiff/tiffiop.h index b6db1e932c..1925a6b5e4 100644 --- a/third_party/libtiff/tiffiop.h +++ b/third_party/libtiff/tiffiop.h @@ -249,6 +249,10 @@ struct tiff { #define TIFFhowmany_32(x, y) (((uint32)x < (0xffffffff - (uint32)(y-1))) ? \ ((((uint32)(x))+(((uint32)(y))-1))/((uint32)(y))) : \ 0U) +/* Variant of TIFFhowmany_32() that doesn't return 0 if x close to MAXUINT. */ +/* Caution: TIFFhowmany_32_maxuint_compat(x,y)*y might overflow */ +#define TIFFhowmany_32_maxuint_compat(x, y) \ + (((uint32)(x) / (uint32)(y)) + ((((uint32)(x) % (uint32)(y)) != 0) ? 1 : 0)) #define TIFFhowmany8_32(x) (((x)&0x07)?((uint32)(x)>>3)+1:(uint32)(x)>>3) #define TIFFroundup_32(x, y) (TIFFhowmany_32(x,y)*(y)) #define TIFFhowmany_64(x, y) ((((uint64)(x))+(((uint64)(y))-1))/((uint64)(y))) |