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Make CEIL_DIV() slightly more overflow-safe

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Taylor Yu 2017-04-05 14:52:48 -04:00
parent 489ef6b38b
commit c5adab0258
1 changed files with 3 additions and 3 deletions
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6
src/common/util.h
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@ -163,9 +163,9 @@ int64_t clamp_double_to_int64(double number);
void simplify_fraction64(uint64_t *numer, uint64_t *denom); void simplify_fraction64(uint64_t *numer, uint64_t *denom);
/* Compute the CEIL of <b>a</b> divided by <b>b</b>, for nonnegative <b>a</b> /* Compute the CEIL of <b>a</b> divided by <b>b</b>, for nonnegative <b>a</b>
* and positive <b>b</b>. Works on integer types only. Not defined if a+b can * and positive <b>b</b>. Works on integer types only. Not defined if a+(b-1)
* overflow. */ * can overflow. */
#define CEIL_DIV(a,b) (((a)+(b)-1)/(b)) #define CEIL_DIV(a,b) (((a)+((b)-1))/(b))
/* Return <b>v</b> if it's between <b>min</b> and <b>max</b>. Otherwise /* Return <b>v</b> if it's between <b>min</b> and <b>max</b>. Otherwise
* return <b>min</b> if <b>v</b> is smaller than <b>min</b>, or <b>max</b> if * return <b>min</b> if <b>v</b> is smaller than <b>min</b>, or <b>max</b> if