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adc17cd41e
strmov() is not guaranteed to work correctly on overlapping source and destination buffers. On some OSes it may work, but Fedora 12 has a stpcpy() that's not working correctly on overlapping buffers. Fixed to use the overlap-safe version of strmov instead. Re-vitalized the overlap-safe version of strmov.
53 lines
1.5 KiB
C
53 lines
1.5 KiB
C
/* 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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strmov(dst, src) moves all the characters of src (including the
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closing NUL) to dst, and returns a pointer to the new closing NUL in
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dst. The similar UNIX routine strcpy returns the old value of dst,
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which I have never found useful. strmov(strmov(dst,a),b) moves a//b
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into dst, which seems useful.
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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 strmov
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#undef strmov
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#define strmov strmov_overlapp
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#endif
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#if !defined(MC68000) && !defined(DS90)
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char *strmov(register char *dst, register const char *src)
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{
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while ((*dst++ = *src++)) ;
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return dst-1;
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}
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#else
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char *strmov(dst, src)
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char *dst, *src;
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{
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asm(" movl 4(a7),a1 ");
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asm(" movl 8(a7),a0 ");
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asm(".L4: movb (a0)+,(a1)+ ");
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asm(" jne .L4 ");
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asm(" movl a1,d0 ");
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asm(" subql #1,d0 ");
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}
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#endif
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