Automatic date update in version.in
[binutils-gdb.git] / libiberty / memcmp.c
blob5b1af020e6cc95841f8aad4d76059b6c886c08a6
1 /* memcmp -- compare two memory regions.
2 This function is in the public domain. */
4 /*
6 @deftypefn Supplemental int memcmp (const void *@var{x}, const void *@var{y}, @
7 size_t @var{count})
9 Compares the first @var{count} bytes of two areas of memory. Returns
10 zero if they are the same, a value less than zero if @var{x} is
11 lexically less than @var{y}, or a value greater than zero if @var{x}
12 is lexically greater than @var{y}. Note that lexical order is determined
13 as if comparing unsigned char arrays.
15 @end deftypefn
19 #include <ansidecl.h>
20 #include <stddef.h>
22 int
23 memcmp (const void *str1, const void *str2, size_t count)
25 register const unsigned char *s1 = (const unsigned char*)str1;
26 register const unsigned char *s2 = (const unsigned char*)str2;
28 while (count-- > 0)
30 if (*s1++ != *s2++)
31 return s1[-1] < s2[-1] ? -1 : 1;
33 return 0;