67 lines
1.8 KiB
C
67 lines
1.8 KiB
C
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/* Copyright (C) 2000 MySQL AB
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; version 2 of the License.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
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/*
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bcmp(s1, s2, len) returns 0 if the "len" bytes starting at "s1" are
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identical to the "len" bytes starting at "s2", non-zero if they are
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different.
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Now only used with purify because purify gives wrong warnings when
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comparing a shorter string with bcmp.
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*/
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#include <my_global.h>
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#include "m_string.h"
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#ifdef HAVE_purify
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#undef bcmp
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#undef HAVE_BCMP
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#endif
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#if !defined(bcmp) && !defined(HAVE_BCMP)
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#if defined(MC68000) && defined(DS90)
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int bcmp(s1,s2, len)
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const char *s1;
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const char *s2;
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uint len; /* 0 <= len <= 65535 */
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{
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asm(" movl 12(a7),d0 ");
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asm(" subqw #1,d0 ");
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asm(" blt .L5 ");
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asm(" movl 4(a7),a1 ");
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asm(" movl 8(a7),a0 ");
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asm(".L4: cmpmb (a0)+,(a1)+ ");
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asm(" dbne d0,.L4 ");
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asm(".L5: addqw #1,d0 ");
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}
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#else
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#ifndef HAVE_purify
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size_t bcmp(register const uchar *s1,register const uchar *s2,
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register size_t len)
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#else
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size_t my_bcmp(register const uchar *s1,register const uchar *s2,
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register size_t len)
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#endif
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{
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while (len-- != 0 && *s1++ == *s2++) ;
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return len+1;
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}
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#endif
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#endif /* BSD_FUNCS */
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