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Annotation of GNUtools/libg++/libiberty/memcmp.c, revision 1.1.1.1

1.1       root        1: /* memcmp -- compare two memory regions.
                      2:    Copyright (C) 1991 Free Software Foundation, Inc.
                      3: 
                      4: This file is part of the libiberty library.
                      5: Libiberty is free software; you can redistribute it and/or
                      6: modify it under the terms of the GNU Library General Public
                      7: License as published by the Free Software Foundation; either
                      8: version 2 of the License, or (at your option) any later version.
                      9: 
                     10: Libiberty is distributed in the hope that it will be useful,
                     11: but WITHOUT ANY WARRANTY; without even the implied warranty of
                     12: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
                     13: Library General Public License for more details.
                     14: 
                     15: You should have received a copy of the GNU Library General Public
                     16: License along with libiberty; see the file COPYING.LIB.  If
                     17: not, write to the Free Software Foundation, Inc., 675 Mass Ave,
                     18: Cambridge, MA 02139, USA.  */
                     19: 
                     20: 
                     21: /*
                     22: 
                     23: NAME
                     24: 
                     25:        memcmp -- compare two memory regions
                     26: 
                     27: SYNOPSIS
                     28: 
                     29:        int memcmp (const void *from, const void *to, size_t count)
                     30: 
                     31: DESCRIPTION
                     32: 
                     33:        Compare two memory regions and return less than,
                     34:        equal to, or greater than zero, according to lexicographical
                     35:        ordering of the compared regions.
                     36: */
                     37: 
                     38: #include <ansidecl.h>
                     39: #ifdef __STDC__
                     40: #include <stddef.h>
                     41: #else
                     42: #define size_t unsigned long
                     43: #endif
                     44: 
                     45: int
                     46: DEFUN(memcmp, (str1, str2, count),
                     47:       PTRCONST str1 AND PTRCONST str2 AND size_t count)
                     48: {
                     49:   register unsigned char *s1 = (unsigned char*)str1;
                     50:   register unsigned char *s2 = (unsigned char*)str2;
                     51: 
                     52:   while (count-- > 0)
                     53:     {
                     54:       if (*s1++ != *s2++)
                     55:          return s1[-1] < s2[-1] ? -1 : 1;
                     56:     }
                     57:   return 0;
                     58: }
                     59: 

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