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/* Removes leading and/or trailing whitespaces
Copyright (C) 2006 Free Software Foundation, Inc.
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 of the License, 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, see <http://www.gnu.org/licenses/>. */
/* Written by Davide Angelocola <davide.angelocola@gmail.com> */
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#if HAVE_MBRTOWC
# include <stddef.h>
# include "mbchar.h"
# include "mbiter.h"
# include "mbuiter.h" /* FIXME: for MB_CUR_MAX */
#else
# include <ctype.h>
#endif
#include "xalloc.h"
#include "trim.h"
char *
trim2(const char *s, int how)
{
char *d;
d = strdup(s);
if (!d)
xalloc_die();
#if HAVE_MBRTOWC
if (MB_CUR_MAX > 1)
{
mbi_iterator_t i;
/* Trim leading whitespaces. */
if (how != TRIM_TRAILING)
{
mbi_init (i, d, strlen (d));
for (; mbi_avail (i) && mb_isspace (mbi_cur (i)); mbi_advance (i))
;
memmove (d, mbi_cur_ptr (i), strlen (mbi_cur_ptr (i)) + 1);
}
/* Trim trailing whitespaces. */
if (how != TRIM_LEADING)
{
int state = 0;
char *r;
mbi_init (i, d, strlen (d));
for (; mbi_avail (i); mbi_advance (i))
{
if (state == 0 && mb_isspace (mbi_cur (i)))
{
state = 0;
continue;
}
if (state == 0 && !mb_isspace (mbi_cur (i)))
{
state = 1;
continue;
}
if (state == 1 && !mb_isspace (mbi_cur (i)))
{
state = 1;
continue;
}
if (state == 1 && mb_isspace (mbi_cur (i)))
{
state = 2;
r = (char *) mbi_cur_ptr (i);
}
else if (state == 2 && mb_isspace (mbi_cur (i)))
{
state = 2;
}
else
{
state = 1;
}
}
if (state == 2)
*r = '\0';
}
}
else
#endif /* HAVE_MBRTOWC */
{
char *p;
/* Trim leading whitespaces. */
if (how != TRIM_TRAILING) {
for (p = d; *p && isspace (*p); p++)
;
memmove (d, p, strlen (p) + 1);
}
/* Trim trailing whitespaces. */
if (how != TRIM_LEADING) {
for (p = d + strlen (d) - 1; p >= d && isspace (*p); p--)
*p = '\0';
}
}
return d;
}
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