/* str/subst.c - Substitute one character for another
* Copyright (C) 2004,2005 Bruce Guenter <bruce@untroubled.org>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <ctype.h>
#include "str.h"
/** Substitute one character for another throughout the string.
\returns the number of substitutions made.
*/
long str_subst(str* s, char from, char to)
{
char* ptr;
unsigned i;
long count;
for (count = 0, i = 0, ptr = s->s; i < s->len; ++i, ++ptr)
if (*ptr == from) {
*ptr = to;
++count;
}
return count;
}