| Alexandre Lision | 8af73cb | 2013-12-10 14:11:20 -0500 | [diff] [blame] | 1 | /* $Id$ */ |
| 2 | /* |
| 3 | * Copyright (C) 2008-2011 Teluu Inc. (http://www.teluu.com) |
| 4 | * Copyright (C) 2003-2008 Benny Prijono <benny@prijono.org> |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License as published by |
| 8 | * the Free Software Foundation; either version 2 of the License, or |
| 9 | * (at your option) any later version. |
| 10 | * |
| 11 | * This program is distributed in the hope that it will be useful, |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | * GNU General Public License for more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU General Public License |
| 17 | * along with this program; if not, write to the Free Software |
| 18 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 19 | */ |
| 20 | #include <pjlib-util/string.h> |
| 21 | #include <pj/ctype.h> |
| 22 | #include <pj/string.h> |
| 23 | #include <pj/pool.h> |
| 24 | |
| 25 | PJ_DEF(pj_str_t) pj_str_unescape( pj_pool_t *pool, const pj_str_t *src_str) |
| 26 | { |
| 27 | char *src = src_str->ptr; |
| 28 | char *end = src + src_str->slen; |
| 29 | pj_str_t dst_str; |
| 30 | char *dst; |
| 31 | |
| 32 | if (pj_strchr(src_str, '%')==NULL) |
| 33 | return *src_str; |
| 34 | |
| 35 | dst = dst_str.ptr = (char*) pj_pool_alloc(pool, src_str->slen); |
| 36 | |
| 37 | while (src != end) { |
| 38 | if (*src == '%' && src < end-2 && pj_isxdigit(*(src+1)) && |
| 39 | pj_isxdigit(*(src+2))) |
| 40 | { |
| 41 | *dst = (pj_uint8_t) ((pj_hex_digit_to_val(*(src+1)) << 4) + |
| 42 | pj_hex_digit_to_val(*(src+2))); |
| 43 | ++dst; |
| 44 | src += 3; |
| 45 | } else { |
| 46 | *dst++ = *src++; |
| 47 | } |
| 48 | } |
| 49 | dst_str.slen = dst - dst_str.ptr; |
| 50 | return dst_str; |
| 51 | } |
| 52 | |
| 53 | PJ_DEF(pj_str_t*) pj_strcpy_unescape(pj_str_t *dst_str, |
| 54 | const pj_str_t *src_str) |
| 55 | { |
| 56 | const char *src = src_str->ptr; |
| 57 | const char *end = src + src_str->slen; |
| 58 | char *dst = dst_str->ptr; |
| 59 | |
| 60 | while (src != end) { |
| 61 | if (*src == '%' && src < end-2) { |
| 62 | *dst = (pj_uint8_t) ((pj_hex_digit_to_val(*(src+1)) << 4) + |
| 63 | pj_hex_digit_to_val(*(src+2))); |
| 64 | ++dst; |
| 65 | src += 3; |
| 66 | } else { |
| 67 | *dst++ = *src++; |
| 68 | } |
| 69 | } |
| 70 | dst_str->slen = dst - dst_str->ptr; |
| 71 | return dst_str; |
| 72 | } |
| 73 | |
| 74 | PJ_DEF(pj_ssize_t) pj_strncpy2_escape( char *dst_str, const pj_str_t *src_str, |
| 75 | pj_ssize_t max, const pj_cis_t *unres) |
| 76 | { |
| 77 | const char *src = src_str->ptr; |
| 78 | const char *src_end = src + src_str->slen; |
| 79 | char *dst = dst_str; |
| 80 | char *dst_end = dst + max; |
| 81 | |
| 82 | if (max < src_str->slen) |
| 83 | return -1; |
| 84 | |
| 85 | while (src != src_end && dst != dst_end) { |
| 86 | if (pj_cis_match(unres, *src)) { |
| 87 | *dst++ = *src++; |
| 88 | } else { |
| 89 | if (dst < dst_end-2) { |
| 90 | *dst++ = '%'; |
| 91 | pj_val_to_hex_digit(*src, dst); |
| 92 | dst+=2; |
| 93 | ++src; |
| 94 | } else { |
| 95 | break; |
| 96 | } |
| 97 | } |
| 98 | } |
| 99 | |
| 100 | return src==src_end ? dst-dst_str : -1; |
| 101 | } |
| 102 | |
| 103 | PJ_DEF(pj_str_t*) pj_strncpy_escape(pj_str_t *dst_str, |
| 104 | const pj_str_t *src_str, |
| 105 | pj_ssize_t max, const pj_cis_t *unres) |
| 106 | { |
| 107 | dst_str->slen = pj_strncpy2_escape(dst_str->ptr, src_str, max, unres); |
| 108 | return dst_str->slen < 0 ? NULL : dst_str; |
| 109 | } |
| 110 | |