diff options
Diffstat (limited to 'src/include/c.h')
| -rw-r--r-- | src/include/c.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/src/include/c.h b/src/include/c.h index 81d8e642da2..3199be3054e 100644 --- a/src/include/c.h +++ b/src/include/c.h @@ -950,6 +950,14 @@ typedef NameData *Name; */ /* + * Invert the sign of a qsort-style comparison result, ie, exchange negative + * and positive integer values, being careful not to get the wrong answer + * for INT_MIN. The argument should be an integral variable. + */ +#define INVERT_COMPARE_RESULT(var) \ + ((var) = ((var) < 0) ? 1 : -(var)) + +/* * Use this, not "char buf[BLCKSZ]", to declare a field or local variable * holding a page buffer, if that page might be accessed as a page and not * just a string of bytes. Otherwise the variable might be under-aligned, |