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