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author | Pádraig Brady <P@draigBrady.com> | 2010-04-28 23:54:33 +0100 |
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committer | Pádraig Brady <P@draigBrady.com> | 2010-04-29 18:55:57 +0100 |
commit | 8b5087d4e62439503e3cba774de225893b9ea81a (patch) | |
tree | 7ac7a407ac5368ca46082a807f17c16d009ded31 /src/sort.c | |
parent | 7905d6d34dbeb73ef03b3c75f66dde9036634775 (diff) | |
download | coreutils-8b5087d4e62439503e3cba774de225893b9ea81a.tar.xz |
sort: use long doubles for general numeric mode
* src/sort.c (general_numcompare): Use long doubles unconditionally,
and strtold when available, to convert numbers with greater range and
precision. Performance was seen to be on par with standard doubles.
* doc/coreutils.texi (sort invocation): Amend the -g description to
mention long double rather than double, and strtold rather than strtod.
* src/getlimits.c (main): Output floating point limits for use in tests.
* tests/misc/sort-float: A new test to ensure sort is using long
doubles when possible, and that locale specific floats are handled.
* tests/Makefile.am: Reference the new test.
* tests/test-lib.sh (getlimits_): Normalize indenting.
* NEWS: Mention the new behaviour.
Reported by Nelson Beebe.
Diffstat (limited to 'src/sort.c')
-rw-r--r-- | src/sort.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/src/sort.c b/src/sort.c index 6d47b794b..a81524470 100644 --- a/src/sort.c +++ b/src/sort.c @@ -1855,10 +1855,16 @@ general_numcompare (const char *sa, const char *sb) /* FIXME: maybe add option to try expensive FP conversion only if A and B can't be compared more cheaply/accurately. */ +#if HAVE_C99_STRTOLD /* provided by c-strtold module. */ +# define STRTOD strtold +#else +# define STRTOD strtod +#endif + char *ea; char *eb; - double a = strtod (sa, &ea); - double b = strtod (sb, &eb); + long double a = STRTOD (sa, &ea); + long double b = STRTOD (sb, &eb); /* Put conversion errors at the start of the collating sequence. */ if (sa == ea) |