diff options
Diffstat (limited to 'libavutil/common.h')
| -rw-r--r-- | libavutil/common.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/libavutil/common.h b/libavutil/common.h index b9fbcc4d60..a60a558b1d 100644 --- a/libavutil/common.h +++ b/libavutil/common.h @@ -81,6 +81,14 @@ #define FFNABS(a) ((a) <= 0 ? (a) : (-(a))) /** + * Unsigned Absolute value. + * This takes the absolute value of a signed int and returns it as a unsigned. + * This also works with INT_MIN which would otherwise not be representable + * As with many macros, this evaluates its argument twice. + */ +#define FFABSU(a) ((a) <= 0 ? -(unsigned)(a) : (unsigned)(a)) + +/** * Comparator. * For two numerical expressions x and y, gives 1 if x > y, -1 if x < y, and 0 * if x == y. This is useful for instance in a qsort comparator callback. |