| /* |
| * Simple URL decoding function |
| * Copyright (c) 2012 Antti Seppälä |
| * |
| * References: |
| * RFC 3986: Uniform Resource Identifier (URI): Generic Syntax |
| * T. Berners-Lee et al. The Internet Society, 2005 |
| * |
| * based on http://www.icosaedro.it/apache/urldecode.c |
| * from Umberto Salsi (salsi@icosaedro.it) |
| * |
| * This file is part of FFmpeg. |
| * |
| * FFmpeg is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Lesser General Public |
| * License as published by the Free Software Foundation; either |
| * version 2.1 of the License, or (at your option) any later version. |
| * |
| * FFmpeg 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 |
| * Lesser General Public License for more details. |
| * |
| * You should have received a copy of the GNU Lesser General Public |
| * License along with FFmpeg; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| */ |
| |
| #include <string.h> |
| |
| #include "libavutil/mem.h" |
| #include "libavutil/avstring.h" |
| #include "urldecode.h" |
| |
| char *ff_urldecode(const char *url, int decode_plus_sign) |
| { |
| int s = 0, d = 0, url_len = 0; |
| char c; |
| char *dest = NULL; |
| |
| if (!url) |
| return NULL; |
| |
| url_len = strlen(url) + 1; |
| dest = av_malloc(url_len); |
| |
| if (!dest) |
| return NULL; |
| |
| while (s < url_len) { |
| c = url[s++]; |
| |
| if (c == '%' && s + 2 < url_len) { |
| char c2 = url[s++]; |
| char c3 = url[s++]; |
| if (av_isxdigit(c2) && av_isxdigit(c3)) { |
| c2 = av_tolower(c2); |
| c3 = av_tolower(c3); |
| |
| if (c2 <= '9') |
| c2 = c2 - '0'; |
| else |
| c2 = c2 - 'a' + 10; |
| |
| if (c3 <= '9') |
| c3 = c3 - '0'; |
| else |
| c3 = c3 - 'a' + 10; |
| |
| dest[d++] = 16 * c2 + c3; |
| |
| } else { /* %zz or something other invalid */ |
| dest[d++] = c; |
| dest[d++] = c2; |
| dest[d++] = c3; |
| } |
| } else if (c == '+' && decode_plus_sign) { |
| dest[d++] = ' '; |
| } else { |
| dest[d++] = c; |
| } |
| |
| } |
| |
| return dest; |
| } |