1/* memcmp -- compare two memory regions.
2 This function is in the public domain. */
3
4/*
5
6@deftypefn Supplemental int memcmp (const void *@var{x}, const void *@var{y}, size_t @var{count})
7
8Compares the first @var{count} bytes of two areas of memory. Returns
9zero if they are the same, a value less than zero if @var{x} is
10lexically less than @var{y}, or a value greater than zero if @var{x}
11is lexically greater than @var{y}. Note that lexical order is determined
12as if comparing unsigned char arrays.
13
14@end deftypefn
15
16*/
17
18#include <ansidecl.h>
| 1/* memcmp -- compare two memory regions.
2 This function is in the public domain. */
3
4/*
5
6@deftypefn Supplemental int memcmp (const void *@var{x}, const void *@var{y}, size_t @var{count})
7
8Compares the first @var{count} bytes of two areas of memory. Returns
9zero if they are the same, a value less than zero if @var{x} is
10lexically less than @var{y}, or a value greater than zero if @var{x}
11is lexically greater than @var{y}. Note that lexical order is determined
12as if comparing unsigned char arrays.
13
14@end deftypefn
15
16*/
17
18#include <ansidecl.h>
|
19#ifdef __STDC__
| 19#ifdef ANSI_PROTOTYPES
|
20#include <stddef.h>
21#else
22#define size_t unsigned long
23#endif
24
25int
| 20#include <stddef.h>
21#else
22#define size_t unsigned long
23#endif
24
25int
|
26DEFUN(memcmp, (str1, str2, count),
27 const PTR str1 AND const PTR str2 AND size_t count)
| 26memcmp (str1, str2, count)
27 const PTR str1;
28 const PTR str2;
29 size_t count;
|
28{
29 register const unsigned char *s1 = (const unsigned char*)str1;
30 register const unsigned char *s2 = (const unsigned char*)str2;
31
32 while (count-- > 0)
33 {
34 if (*s1++ != *s2++)
35 return s1[-1] < s2[-1] ? -1 : 1;
36 }
37 return 0;
38}
39
| 30{
31 register const unsigned char *s1 = (const unsigned char*)str1;
32 register const unsigned char *s2 = (const unsigned char*)str2;
33
34 while (count-- > 0)
35 {
36 if (*s1++ != *s2++)
37 return s1[-1] < s2[-1] ? -1 : 1;
38 }
39 return 0;
40}
41
|