diff options
Diffstat (limited to 'libtiff/tiffiop.h')
| -rw-r--r-- | libtiff/tiffiop.h | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/libtiff/tiffiop.h b/libtiff/tiffiop.h index 8bcd0c17..5294ee78 100644 --- a/libtiff/tiffiop.h +++ b/libtiff/tiffiop.h @@ -1,4 +1,4 @@ -/* $Id: tiffiop.h,v 1.89 2016-01-23 21:20:34 erouault Exp $ */ +/* $Id: tiffiop.h,v 1.90 2016-12-02 21:56:56 erouault Exp $ */ /* * Copyright (c) 1988-1997 Sam Leffler @@ -250,6 +250,10 @@ 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))) |