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/* $Id$ */
/*
* Copyright (C) 2008-2009 Teluu Inc. (http://www.teluu.com)
* Copyright (C) 2003-2008 Benny Prijono <benny@prijono.org>
*
* 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 2 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, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <pjlib-util/string.h>
#include <pj/ctype.h>
#include <pj/string.h>
#include <pj/pool.h>
PJ_DEF(pj_str_t) pj_str_unescape( pj_pool_t *pool, const pj_str_t *src_str)
{
char *src = src_str->ptr;
char *end = src + src_str->slen;
pj_str_t dst_str;
char *dst;
if (pj_strchr(src_str, '%')==NULL)
return *src_str;
dst = dst_str.ptr = (char*) pj_pool_alloc(pool, src_str->slen);
while (src != end) {
if (*src == '%' && src < end-2 && pj_isxdigit(*(src+1)) &&
pj_isxdigit(*(src+2)))
{
*dst = (pj_uint8_t) ((pj_hex_digit_to_val(*(src+1)) << 4) +
pj_hex_digit_to_val(*(src+2)));
++dst;
src += 3;
} else {
*dst++ = *src++;
}
}
dst_str.slen = dst - dst_str.ptr;
return dst_str;
}
PJ_DEF(pj_str_t*) pj_strcpy_unescape(pj_str_t *dst_str,
const pj_str_t *src_str)
{
const char *src = src_str->ptr;
const char *end = src + src_str->slen;
char *dst = dst_str->ptr;
while (src != end) {
if (*src == '%' && src < end-2) {
*dst = (pj_uint8_t) ((pj_hex_digit_to_val(*(src+1)) << 4) +
pj_hex_digit_to_val(*(src+2)));
++dst;
src += 3;
} else {
*dst++ = *src++;
}
}
dst_str->slen = dst - dst_str->ptr;
return dst_str;
}
PJ_DEF(pj_ssize_t) pj_strncpy2_escape( char *dst_str, const pj_str_t *src_str,
pj_ssize_t max, const pj_cis_t *unres)
{
const char *src = src_str->ptr;
const char *src_end = src + src_str->slen;
char *dst = dst_str;
char *dst_end = dst + max;
if (max < src_str->slen)
return -1;
while (src != src_end && dst != dst_end) {
if (pj_cis_match(unres, *src)) {
*dst++ = *src++;
} else {
if (dst < dst_end-2) {
*dst++ = '%';
pj_val_to_hex_digit(*src, dst);
dst+=2;
++src;
} else {
break;
}
}
}
return src==src_end ? dst-dst_str : -1;
}
PJ_DEF(pj_str_t*) pj_strncpy_escape(pj_str_t *dst_str,
const pj_str_t *src_str,
pj_ssize_t max, const pj_cis_t *unres)
{
dst_str->slen = pj_strncpy2_escape(dst_str->ptr, src_str, max, unres);
return dst_str->slen < 0 ? NULL : dst_str;
}
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