/[gnats]/gnats/libiberty/memcmp.c
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revision 1.2 by pdm, Mon Dec 10 23:03:26 2001 UTC revision 1.3 by chewie, Sat Nov 13 05:14:17 2004 UTC
# Line 2  Line 2 
2     This function is in the public domain.  */     This function is in the public domain.  */
3    
4  /*  /*
 NAME  
         memcmp -- compare two memory regions  
5    
6  SYNOPSIS  @deftypefn Supplemental int memcmp (const void *@var{x}, const void *@var{y}, size_t @var{count})
7          int memcmp (const void *from, const void *to, size_t count)  
8    Compares the first @var{count} bytes of two areas of memory.  Returns
9    zero if they are the same, a value less than zero if @var{x} is
10    lexically less than @var{y}, or a value greater than zero if @var{x}
11    is lexically greater than @var{y}.  Note that lexical order is determined
12    as if comparing unsigned char arrays.
13    
14    @end deftypefn
15    
 DESCRIPTION  
         Compare two memory regions and return less than,  
         equal to, or greater than zero, according to lexicographical  
         ordering of the compared regions.  
16  */  */
17    
18  #include <ansidecl.h>  #include <ansidecl.h>
19  #ifdef __STDC__  #ifdef ANSI_PROTOTYPES
20  #include <stddef.h>  #include <stddef.h>
21  #else  #else
22  #define size_t unsigned long  #define size_t unsigned long
23  #endif  #endif
24    
25  int  int
26  DEFUN(memcmp, (str1, str2, count),  memcmp (str1, str2, count)
27        const PTR str1 AND const PTR str2 AND size_t count)       const PTR str1;
28         const PTR str2;
29         size_t count;
30  {  {
31    register const unsigned char *s1 = (const unsigned char*)str1;    register const unsigned char *s1 = (const unsigned char*)str1;
32    register const unsigned char *s2 = (const unsigned char*)str2;    register const unsigned char *s2 = (const unsigned char*)str2;

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