From 97ee9c3f29d2708e2a9383c5bfe5a3dd7dfe60dd Mon Sep 17 00:00:00 2001 From: kan Date: Sat, 19 May 2007 01:27:20 +0000 Subject: GCC 4.2.0 release miscellaneous support libraries. --- contrib/gcclibs/libiberty/memcmp.c | 34 ++++++++++++++++++++++++++++++++++ 1 file changed, 34 insertions(+) create mode 100644 contrib/gcclibs/libiberty/memcmp.c (limited to 'contrib/gcclibs/libiberty/memcmp.c') diff --git a/contrib/gcclibs/libiberty/memcmp.c b/contrib/gcclibs/libiberty/memcmp.c new file mode 100644 index 0000000..39edfca --- /dev/null +++ b/contrib/gcclibs/libiberty/memcmp.c @@ -0,0 +1,34 @@ +/* memcmp -- compare two memory regions. + This function is in the public domain. */ + +/* + +@deftypefn Supplemental int memcmp (const void *@var{x}, const void *@var{y}, size_t @var{count}) + +Compares the first @var{count} bytes of two areas of memory. Returns +zero if they are the same, a value less than zero if @var{x} is +lexically less than @var{y}, or a value greater than zero if @var{x} +is lexically greater than @var{y}. Note that lexical order is determined +as if comparing unsigned char arrays. + +@end deftypefn + +*/ + +#include +#include + +int +memcmp (const PTR str1, const PTR str2, size_t count) +{ + register const unsigned char *s1 = (const unsigned char*)str1; + register const unsigned char *s2 = (const unsigned char*)str2; + + while (count-- > 0) + { + if (*s1++ != *s2++) + return s1[-1] < s2[-1] ? -1 : 1; + } + return 0; +} + -- cgit v1.1