1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/librazor/path.c Fri Apr 15 16:58:07 2016 +0100
1.3 @@ -0,0 +1,193 @@
1.4 +/*
1.5 + * Copyright (C) 2014 J. Ali Harlow <ali@juiblex.co.uk>
1.6 + *
1.7 + * This program is free software; you can redistribute it and/or modify
1.8 + * it under the terms of the GNU General Public License as published by
1.9 + * the Free Software Foundation; either version 2 of the License, or
1.10 + * (at your option) any later version.
1.11 + *
1.12 + * This program is distributed in the hope that it will be useful,
1.13 + * but WITHOUT ANY WARRANTY; without even the implied warranty of
1.14 + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
1.15 + * GNU General Public License for more details.
1.16 + *
1.17 + * You should have received a copy of the GNU General Public License along
1.18 + * with this program; if not, write to the Free Software Foundation, Inc.,
1.19 + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
1.20 + */
1.21 +
1.22 +#include "config.h"
1.23 +#include <stdlib.h>
1.24 +#include <string.h>
1.25 +#include "razor.h"
1.26 +#include "razor-internal.h"
1.27 +
1.28 +/**
1.29 + * razor_path_add_root:
1.30 + *
1.31 + * Adds a root to a path. path must be an absolute pathname. In POSIX
1.32 + * environments this is equivalent to the concationation of root and path.
1.33 + * In Microsoft Windows an adjustment may need to be made for a drive letter
1.34 + * in path (which will be dropped).
1.35 + *
1.36 + * Returns: The new pathname.
1.37 + **/
1.38 +RAZOR_EXPORT char *razor_path_add_root(const char *path, const char *root)
1.39 +{
1.40 + if (root && *root)
1.41 + return razor_concat(root, SKIP_DRIVE_LETTER(path), NULL);
1.42 + else
1.43 + return strdup(path);
1.44 +}
1.45 +
1.46 +#if 0
1.47 +
1.48 +/*
1.49 + * This should work, but for some reason PathCreateFromUrlW()
1.50 + * treats the percent-encoded bytes as being in CP 850 rather
1.51 + * than UTF-8 as expected even if we set the codepage.
1.52 + */
1.53 +RAZOR_EXPORT char *razor_path_from_url(const char *url)
1.54 +{
1.55 + UINT saved_cp;
1.56 + HRESULT result;
1.57 + DWORD len = MAX_PATH;
1.58 + wchar_t *url16;
1.59 + wchar_t path16[MAX_PATH];
1.60 + char *path;
1.61 +
1.62 + url16 = razor_utf8_to_utf16(url, -1);
1.63 +
1.64 + saved_cp = GetConsoleCP();
1.65 + SetConsoleCP(CP_UTF8);
1.66 +
1.67 + result = PathCreateFromUrlW(url16, path16, &len, NULL);
1.68 +
1.69 + SetConsoleCP(saved_cp);
1.70 +
1.71 + if (result == S_OK)
1.72 + path = razor_utf16_to_utf8(path16, len);
1.73 + else
1.74 + path = NULL;
1.75 +
1.76 + free(url16);
1.77 +
1.78 + return path;
1.79 +}
1.80 +
1.81 +#else
1.82 +
1.83 +#ifdef MSWIN_API
1.84 +static int is_ascii_letter(char c)
1.85 +{
1.86 + return (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z');
1.87 +}
1.88 +#endif
1.89 +
1.90 +static int xdigit_value(char c)
1.91 +{
1.92 + if (c >= '0' && c <= '9')
1.93 + return c - '0';
1.94 + else
1.95 + return (c | 0x20) - 'a' + 10;
1.96 +}
1.97 +
1.98 +static int valid_unicode(unsigned unicode)
1.99 +{
1.100 + /*
1.101 + * Within the U+0000..U+10FFFF range defined by RFC3629
1.102 + * but not in the U+D800..U+DFFF range prohibited in UTF-8.
1.103 + */
1.104 + return unicode < 0xD800 || (unicode >= 0xE000 && unicode < 0x110000);
1.105 +}
1.106 +
1.107 +RAZOR_EXPORT char *razor_path_from_url(const char *url)
1.108 +{
1.109 + int continuation_bytes = 0;
1.110 + char *path, *p;
1.111 + unsigned char c;
1.112 + unsigned unicode;
1.113 +
1.114 + if (strncmp(url, "file://", 7) == 0)
1.115 + url += 7;
1.116 + else
1.117 + return NULL;
1.118 +
1.119 + if (strncmp(url, "localhost/", 10) == 0)
1.120 + url += 9;
1.121 + else if (strncmp(url, "/", 1) != 0)
1.122 + return NULL;
1.123 +
1.124 +#ifdef MSWIN_API
1.125 + /*
1.126 + * Under MS-Windows, file:///c:/xxx maps to c:/xxx
1.127 + * Note that PathCreateFromUrl converts / to \ as well.
1.128 + */
1.129 + if (is_ascii_letter(url[1]) && url[2] == ':' && url[3] == '/')
1.130 + url++;
1.131 +#endif
1.132 +
1.133 + p = path = malloc(strlen(url) + 1);
1.134 +
1.135 + while(*url) {
1.136 + if (*url >= 0x7F || *url < 0x20) {
1.137 + free(path);
1.138 + return NULL;
1.139 + } else if (*url != '%') {
1.140 + if (continuation_bytes) {
1.141 + free(path);
1.142 + return NULL;
1.143 + } else
1.144 + *p++ = *url++;
1.145 + } else if (isxdigit(url[1]) && isxdigit(url[2])) {
1.146 + c = xdigit_value(url[1]) * 16 + xdigit_value(url[2]);
1.147 + if (c == '/') {
1.148 + free(path);
1.149 + return NULL;
1.150 + } else if (!continuation_bytes) {
1.151 + if (c >= 0xF5 || c == 0xC0 || c == 0xC1) {
1.152 + free(path);
1.153 + return NULL;
1.154 + } else if (c >= 0xF0) {
1.155 + unicode = c & 7;
1.156 + continuation_bytes = 3;
1.157 + } else if (c >= 0xE0) {
1.158 + unicode = c & 3;
1.159 + continuation_bytes = 2;
1.160 + } else if (c >= 0xC0) {
1.161 + unicode = c & 1;
1.162 + continuation_bytes = 1;
1.163 + }
1.164 + } else if ((c & 0xC0) != 0x80) {
1.165 + free(path);
1.166 + return NULL;
1.167 + } else {
1.168 + unicode <<= 6;
1.169 + unicode |= (c & 0x3F);
1.170 +
1.171 + if (!--continuation_bytes &&
1.172 + !valid_unicode(unicode)) {
1.173 + free(path);
1.174 + return NULL;
1.175 + }
1.176 + }
1.177 +
1.178 + *p++ = c;
1.179 + url += 3;
1.180 + } else {
1.181 + free(path);
1.182 + return NULL;
1.183 + }
1.184 + }
1.185 +
1.186 + if (continuation_bytes) {
1.187 + free(path);
1.188 + return NULL;
1.189 + }
1.190 +
1.191 + *p++ = '\0';
1.192 +
1.193 + return realloc(path, p - path);
1.194 +}
1.195 +
1.196 +#endif /* 0 */