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/* Implement string-related runtime actions for CHILL.
Copyright (C) 1992,1993 Free Software Foundation, Inc.
Author: Bill Cox
This file is part of GNU CC.
GNU CC 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; either version 2, or (at your option)
any later version.
GNU CC 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 GNU CC; see the file COPYING. If not, write to
the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
#define MIN(a, b) ((a) < (b) ? (a) : (b))
/*
* function memmove
*
* parameters:
* S1 - pointer to destination string
* S2 - pointer to source string
* LEN - length of string
*
* returns:
* pointer to destination string
*
* exceptions:
* none
*
* abstract:
* copies a string safely, where the source and dest areas may overlap.
*
*/
void *
memmove (s1, s2, n)
void *s1;
const void *s2;
int n;
{
char *sc1 = s1;
const char *sc2 = s2;
if (sc2 < sc1 && (sc1 < sc2 + n))
for (sc1 += n, sc2 += n; 0 < n; --n)
*--sc1 = *--sc2;
else
#if 0
for (; 0 < n; --n)
*sc1++ = *sc2++;
#else
memcpy (sc1, sc2, n);
#endif
return s1;
}
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