/* $Id: string.c 974 2007-02-19 01:13:53Z bennylp $ *//*  * Copyright (C)2003-2007 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 = 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;}