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/*
* $Id: trim.h,v 1.1.1.1 2005/06/13 16:47:29 bogdan_iancu Exp $
*
* Copyright (C) 2001-2003 FhG Fokus
*
* This file is part of openser, a free SIP server.
*
* openser 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 of the License, or
* (at your option) any later version
*
* openser 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
*/
#ifndef TRIM_H
#define TRIM_H
#include "str.h"
/*
* This switch-case statement is used in
* trim_leading and trim_trailing. You can
* define characters that should be skipped
* here.
*/
#define TRIM_SWITCH(c) switch(c) { \
case ' ': \
case '\t': \
case '\r': \
case '\n': \
break; \
\
default: \
return; \
}
/*
* Remove any leading whitechars, like spaces,
* horizontal tabs, carriage returns and line
* feeds
*
* WARNING: String descriptor structure will be
* modified ! Make a copy otherwise you
* might be unable to free _s->s for
* example !
*
*/
static inline void trim_leading(str* _s)
{
for(; _s->len > 0; _s->len--, _s->s++) {
TRIM_SWITCH(*(_s->s));
}
}
/*
* Remove any trailing white char, like spaces,
* horizontal tabs, carriage returns and line feeds
*
* WARNING: String descriptor structure will be
* modified ! Make a copy otherwise you
* might be unable to free _s->s for
* example !
*/
static inline void trim_trailing(str* _s)
{
for(; _s->len > 0; _s->len--) {
TRIM_SWITCH(_s->s[_s->len - 1]);
}
}
/*
* Do trim_leading and trim_trailing
*
* WARNING: String structure will be modified !
* Make a copy otherwise you might be
* unable to free _s->s for example !
*/
static inline void trim(str* _s)
{
trim_leading(_s);
trim_trailing(_s);
}
#endif /* TRIM_H */
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