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124 lines
3.2 KiB
124 lines
3.2 KiB
/*
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* Copyright (C) 2001-2003 FhG Fokus
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*
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* This file is part of Kamailio, a free SIP server.
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*
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* Kamailio is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version
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*
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* Kamailio is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef TRIM_H
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#define TRIM_H
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#include "str.h"
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/*!
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* This switch-case statement is used in
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* trim_leading and trim_trailing. You can
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* define characters that should be skipped
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* here.
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*/
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#define TRIM_SWITCH(c) switch(c) { \
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case ' ': \
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case '\t': \
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case '\r': \
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case '\n': \
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break; \
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\
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default: \
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return; \
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}
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/*
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* Remove any leading whitechars, like spaces,
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* horizontal tabs, carriage returns and line
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* feeds
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*
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* WARNING: String descriptor structure will be
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* modified ! Make a copy otherwise you
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* might be unable to free _s->s for
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* example !
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*
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*/
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static inline void trim_leading(str* _s)
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{
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for(; _s->len > 0; _s->len--, _s->s++) {
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TRIM_SWITCH(*(_s->s));
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}
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}
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/*
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* Remove any trailing white char, like spaces,
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* horizontal tabs, carriage returns and line feeds
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*
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* WARNING: String descriptor structure will be
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* modified ! Make a copy otherwise you
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* might be unable to free _s->s for
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* example !
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*/
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static inline void trim_trailing(str* _s)
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{
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for(; _s->len > 0; _s->len--) {
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TRIM_SWITCH(_s->s[_s->len - 1]);
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}
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}
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/*
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* Do trim_leading and trim_trailing
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*
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* WARNING: String structure will be modified !
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* Make a copy otherwise you might be
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* unable to free _s->s for example !
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*/
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static inline void trim(str* _s)
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{
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trim_leading(_s);
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trim_trailing(_s);
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}
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/*
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* right and left space trimming
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*
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* WARNING: String structure will be modified !
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* Make a copy otherwise you might be
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* unable to free _s_->s for example !
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*/
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#define trim_spaces_lr(_s_) \
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do{ \
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for(;(_s_).s[(_s_).len-1]==' ';(_s_).s[--(_s_).len]=0); \
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for(;(_s_).s[0]==' ';(_s_).s=(_s_).s+1,(_s_).len--); \
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\
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} while(0);
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/*
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* right and left zero trimming
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*
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* WARNING: String structure will be modified !
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* Make a copy otherwise you might be
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* unable to free _s_->s for example !
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*/
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#define trim_zeros_lr(_s_) \
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do{ \
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for(;(_s_)->s[(_s_)->len-1]=='\0';(_s_)->s[--(_s_)->len]=0); \
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for(;(_s_)->s[0]=='\0';(_s_)->s=(_s_)->s+1,(_s_)->len--); \
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\
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} while(0);
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#endif /* TRIM_H */
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