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/* Copyright (c) 2000, 2006 MySQL AB
Use is subject to license terms.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; version 2 of the License.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
/* File : strchr.c
Author : Richard A. O'Keefe.
Michael Widenius: ifdef MC68000
Updated: 20 April 1984
Defines: strchr(), index()
strchr(s, c) returns a pointer to the first place in s where c
occurs, or NullS if c does not occur in s. This function is called
index in V7 and 4.?bsd systems; while not ideal the name is clearer
than strchr, so index remains in strings.h as a macro. NB: strchr
looks for single characters, not for sets or strings. To find the
NUL character which closes s, use strchr(s, '\0') or strend(s). The
parameter 'c' is declared 'int' so it will go in a register; if your
C compiler is happy with register _char_ change it to that.
*/
#include "strings.h"
#if defined(MC68000) && defined(DS90)
char* strchr(char *s, pchar c)
{
asm(" movl 4(a7),a0 ");
asm(" movl 8(a7),d1 ");
asm(".L2: movb (a0)+,d0 ");
asm(" cmpb d0,d1 ");
asm(" beq .L1 ");
asm(" tstb d0 ");
asm(" bne .L2 ");
asm(" moveq #0,d0 ");
asm(" rts ");
asm(".L1: movl a0,d0 ");
asm(" subql #1,d0 ");
}
#else
char *strchr(register const char *s, register pchar c)
{
for (;;)
{
if (*s == (char) c) return (char*) s;
if (!*s++) return NullS;
}
}
#endif
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