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sort: use long doubles only when effective

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* src/sort.c (general_numcompare): Don't use long double if strtold
is not available, as it may introduce needless overhead.
This commit is contained in:
Paul Eggert
2010-04-30 23:23:38 +01:00
committed by Pádraig Brady
parent 5e9a7ae46b
commit d861519d2a
1 changed files with 6 additions and 4 deletions
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src/sort.c
+6 -4
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@@ -1856,15 +1856,17 @@ general_numcompare (const char *sa, const char *sb)
only if A and B can't be compared more cheaply/accurately. */
#if HAVE_C99_STRTOLD /* provided by c-strtold module. */
# define STRTOD strtold
# define long_double long double
#else
# define STRTOD strtod
# define long_double double
# undef strtold
# define strtold strtod
#endif
char *ea;
char *eb;
long double a = STRTOD (sa, &ea);
long double b = STRTOD (sb, &eb);
long_double a = strtold (sa, &ea);
long_double b = strtold (sb, &eb);
/* Put conversion errors at the start of the collating sequence. */
if (sa == ea)