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Diffstat (limited to 'contrib/binutils/libiberty/memcmp.c')
-rw-r--r-- | contrib/binutils/libiberty/memcmp.c | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/contrib/binutils/libiberty/memcmp.c b/contrib/binutils/libiberty/memcmp.c new file mode 100644 index 0000000..92f2b6e --- /dev/null +++ b/contrib/binutils/libiberty/memcmp.c @@ -0,0 +1,41 @@ +/* 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 <ansidecl.h> +#ifdef ANSI_PROTOTYPES +#include <stddef.h> +#else +#define size_t unsigned long +#endif + +int +memcmp (str1, str2, count) + 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; +} + |