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/* xstrrpl.c -- replacement of substrings
Copyright (c) 1988-1993 Miguel Santana
Copyright (c) 1995-1999 Akim Demaille, Miguel Santana
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; either version 3, or (at your option)
any later version.
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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
/* Author: Akim Demaille <demaille@inf.enst.fr> */
#include "system.h"
#include <assert.h>
#include "xstrrpl.h"
extern char * stpcpy();
/* Perform subsitutions in string. Result is malloc'd
E.g., result = xstrrrpl ("1234", subst) gives result = "112333"
where subst = { {"1", "11"}, {"3", "333"}, { "4", ""}}
*/
char *
xstrrpl (const char * string, const char * subst[][2])
{
char * res, * cp;
int i;
size_t max = 0;
for (i = 0 ; subst[i][0] ; i++)
max = (max > strlen (subst[i][1])) ? max : strlen (subst[i][1]);
/* Add one to make sure that it is never zero, which might cause malloc
to return NULL. */
res = XMALLOC (char, strlen (string) * (max + 1) + 1);
cp = res;
/* Perform the substitutions */
while (*string)
{
for (i = 0 ; subst[i][0] ; i++)
if (!strncmp (subst[i][0], string, strlen (subst[i][0])))
{
cp = stpcpy (cp, subst[i][1]);
string += strlen (subst[i][0]);
goto __next_char;
}
*cp++ = *string++;
__next_char:
/* nothing */;
}
*cp = '\0';
#if DEBUG
assert (strlen (string) * (max + 1) < cp - res);
#endif
res = XREALLOC (res, char, cp - res + 1);
return res;
}
/* Destructive version */
void
strrpl (char ** string, const char * subst[][2])
{
char * res;
res = xstrrpl (*string, subst);
free (*string);
*string = res;
}
/* Perform subsitution in string. String is untouched, result is malloc'd
E.g., result = xstrrrpl ("1234", "1", "11", "3", "333", "4", "", NULL)
gives result = "112333"
*/
#if __STDC__
char *
xvstrrpl (const char * string, ...)
#else
char *
xvstrrpl (va_alist)
va_dcl
#endif
{
#if ! __STDC__
const char *string;
#endif
va_list ap;
const char * subst[100][2]; /* Hope this is enough :) */
int i = 0;
/* Copy arguments into `args'. */
#if __STDC__
va_start (ap, string);
#else
va_start (ap);
string = va_arg (ap, char *);
#endif
for (i = 0 ; (subst[i / 2][i % 2] = va_arg (ap, char *)) ; i++)
;
va_end (ap);
if (i % 2)
return NULL;
return xstrrpl (string, subst);
}
/* Destructive version */
#if __STDC__
void
vstrrpl (char **string, ...)
#else
void
vstrrpl (va_alist)
va_dcl
#endif
{
#if ! __STDC__
char **string;
#endif
va_list ap;
const char * subst[100][2]; /* Hope this is enough :) */
int i = 0;
/* Copy arguments into `args'. */
#if __STDC__
va_start (ap, string);
#else
va_start (ap);
string = va_arg (ap, char **);
#endif
for (i = 0 ; (subst[i / 2][i % 2] = va_arg (ap, char *)) ; i++)
;
va_end (ap);
if (i % 2)
free (*string);
else
strrpl (string, subst);
}
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