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1.4 |
/* |
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root |
1.7 |
* This file is part of Deliantra, the Roguelike Realtime MMORPG. |
3 |
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1.4 |
* |
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1.8 |
* Copyright (©) 2005,2006,2007,2008 Marc Alexander Lehmann / Robin Redeker / the Deliantra team |
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1.5 |
* Copyright (©) 2002,2007 Mark Wedel & Crossfire Development Team |
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* Copyright (©) 1992,2007 Frank Tore Johansen |
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root |
1.4 |
* |
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root |
1.7 |
* Deliantra is free software: you can redistribute it and/or modify |
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1.6 |
* it under the terms of the GNU General Public License as published by |
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* the Free Software Foundation, either version 3 of the License, or |
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* (at your option) any later version. |
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1.4 |
* |
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1.6 |
* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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root |
1.4 |
* |
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root |
1.6 |
* You should have received a copy of the GNU General Public License |
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* along with this program. If not, see <http://www.gnu.org/licenses/>. |
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1.5 |
* |
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1.7 |
* The authors can be reached via e-mail to <support@deliantra.net> |
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root |
1.4 |
*/ |
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elmex |
1.1 |
#include <assert.h> |
25 |
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#include <stdio.h> |
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#include <string.h> |
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#include <global.h> |
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#include "define.h" |
30 |
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#include "path.h" |
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#if 0 |
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root |
1.2 |
|
35 |
elmex |
1.1 |
/** |
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* Define DEBUG_PATH to enable debug output. |
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*/ |
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root |
1.2 |
# define DEBUG_PATH |
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elmex |
1.1 |
#endif |
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#if 0 |
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root |
1.2 |
|
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elmex |
1.1 |
/** |
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* Define TEST_PATH to compile this file as a stand-alone self-test application |
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* for the functions. |
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*/ |
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root |
1.2 |
# define TEST_PATH |
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elmex |
1.1 |
|
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root |
1.2 |
# define LOG fprintf |
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# define llevDebug stderr |
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# define llevError stderr |
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elmex |
1.1 |
#endif |
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root |
1.2 |
char * |
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path_combine (const char *src, const char *dst) |
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{ |
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char *p; |
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static char path[HUGE_BUF]; |
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if (*dst == '/') |
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{ |
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/* absolute destination path => ignore source path */ |
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strcpy (path, dst); |
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} |
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else |
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{ |
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/* relative destination path => add after last '/' of source */ |
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strcpy (path, src); |
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p = strrchr (path, '/'); |
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if (p != NULL) |
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{ |
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p++; |
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} |
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else |
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{ |
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p = path; |
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if (*src == '/') |
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*p++ = '/'; |
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elmex |
1.1 |
} |
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1.2 |
strcpy (p, dst); |
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elmex |
1.1 |
} |
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#if defined(DEBUG_PATH) |
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1.2 |
LOG (llevDebug, "path_combine(%s, %s) = %s\n", src, dst, path); |
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elmex |
1.1 |
#endif |
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root |
1.2 |
return (path); |
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elmex |
1.1 |
} |
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root |
1.2 |
void |
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path_normalize (char *path) |
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{ |
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char *p; /* points to the beginning of the path not yet processed; this is |
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either a path component or a path separator character */ |
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char *q; /* points to the end of the path component p points to */ |
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char *w; /* points to the end of the already normalized path; w <= p is |
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maintained */ |
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size_t len; /* length of current component (which p points to) */ |
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elmex |
1.1 |
|
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#if defined(DEBUG_PATH) |
101 |
root |
1.2 |
LOG (llevDebug, "path_normalize: input '%s'\n", path); |
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elmex |
1.1 |
#endif |
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root |
1.2 |
p = path; |
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w = p; |
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while (*p != '\0') |
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{ |
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if (*p == '/') |
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{ |
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if ((w == path && *path == '/') || (w > path && w[-1] != '/')) |
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*w++ = '/'; |
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p++; |
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continue; |
115 |
elmex |
1.1 |
} |
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root |
1.2 |
q = strchr (p, '/'); |
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if (q == NULL) |
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q = p + strlen (p); |
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len = q - p; |
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assert (len > 0); |
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elmex |
1.1 |
|
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#if defined(DEBUG_PATH) |
124 |
root |
1.2 |
LOG (llevDebug, "path_normalize: checking '%.*s'\n", (int) len, p); |
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elmex |
1.1 |
#endif |
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root |
1.2 |
if (len == 1 && *p == '.') |
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{ |
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/* remove current component */ |
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} |
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else if (len == 2 && memcmp (p, "..", 2) == 0) |
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{ |
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if (w == path || (w == path + 3 && memcmp (path, "../", 3) == 0)) |
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{ |
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/* keep ".." at beginning of relative path ("../x" => "../x") */ |
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memmove (w, p, len); |
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w += len; |
138 |
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} |
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else if (w == path + 1 && *path == '/') |
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{ |
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/* remove ".." at beginning of absolute path ("/../x" => "/x") */ |
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} |
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else |
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{ |
145 |
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/* remove both current component ".." and preceding one */ |
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if (w > path && w[-1] == '/') |
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w--; |
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while (w > path && w[-1] != '/') |
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w--; |
150 |
elmex |
1.1 |
} |
151 |
root |
1.2 |
} |
152 |
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else |
153 |
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{ |
154 |
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/* normal component ==> add it */ |
155 |
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memmove (w, p, len); |
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w += len; |
157 |
elmex |
1.1 |
} |
158 |
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159 |
root |
1.2 |
p = q; |
160 |
elmex |
1.1 |
|
161 |
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#if defined(DEBUG_PATH) |
162 |
root |
1.2 |
LOG (llevDebug, "path_normalize: so far '%.*s'\n", (int) (w - path), path); |
163 |
elmex |
1.1 |
#endif |
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} |
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root |
1.2 |
/* remove trailing slashes, but keep the one at the start of the path */ |
167 |
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while (w > path + 1 && w[-1] == '/') |
168 |
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{ |
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w--; |
170 |
elmex |
1.1 |
} |
171 |
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172 |
root |
1.2 |
*w = '\0'; |
173 |
elmex |
1.1 |
|
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#if defined(DEBUG_PATH) |
175 |
root |
1.2 |
LOG (llevDebug, "path_normalize: result '%s'\n", path); |
176 |
elmex |
1.1 |
#endif |
177 |
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} |
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179 |
root |
1.2 |
char * |
180 |
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path_combine_and_normalize (const char *src, const char *dst) |
181 |
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{ |
182 |
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char *path; |
183 |
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path = path_combine (src, dst); |
185 |
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path_normalize (path); |
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return (path); |
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} |
188 |
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189 |
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#if defined(TEST_PATH) |
190 |
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static void |
191 |
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check_combine (const char *src, const char *dst, const char *exp) |
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{ |
193 |
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const char *res; |
194 |
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195 |
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fprintf (stderr, "path_combine(%s, %s) = ", src, dst); |
196 |
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res = path_combine (src, dst); |
197 |
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fprintf (stderr, "%s", res); |
198 |
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if (strcmp (res, exp) != 0) |
199 |
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{ |
200 |
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fprintf (stderr, ", should be %s\n", exp); |
201 |
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} |
202 |
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else |
203 |
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{ |
204 |
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fprintf (stderr, " (OK)\n"); |
205 |
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} |
206 |
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} |
207 |
elmex |
1.1 |
|
208 |
root |
1.2 |
static void |
209 |
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check_normalize (const char *path, const char *exp0) |
210 |
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{ |
211 |
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char tmp[HUGE_BUF]; |
212 |
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char exp[HUGE_BUF]; |
213 |
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214 |
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strcpy (exp, exp0 == NULL ? path : exp0); |
215 |
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216 |
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strcpy (tmp, path); |
217 |
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fprintf (stderr, "path_normalize(%s) = ", tmp); |
218 |
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path_normalize (tmp); |
219 |
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fprintf (stderr, "%s", tmp); |
220 |
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if (strcmp (tmp, exp) != 0) |
221 |
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{ |
222 |
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fprintf (stderr, ", should be %s\n", exp); |
223 |
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} |
224 |
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else |
225 |
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{ |
226 |
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fprintf (stderr, " (OK)\n"); |
227 |
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} |
228 |
elmex |
1.1 |
} |
229 |
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230 |
root |
1.2 |
static void |
231 |
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check_combine_and_normalize (const char *src, const char *dst, const char *exp) |
232 |
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{ |
233 |
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const char *res; |
234 |
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235 |
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fprintf (stderr, "path_combine_and_normalize(%s, %s) = ", src, dst); |
236 |
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res = path_combine_and_normalize (src, dst); |
237 |
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fprintf (stderr, "%s", res); |
238 |
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if (strcmp (res, exp) != 0) |
239 |
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{ |
240 |
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fprintf (stderr, ", should be %s\n", exp); |
241 |
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} |
242 |
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else |
243 |
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{ |
244 |
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fprintf (stderr, " (OK)\n"); |
245 |
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} |
246 |
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} |
247 |
elmex |
1.1 |
|
248 |
root |
1.2 |
int |
249 |
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main () |
250 |
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{ |
251 |
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check_combine ("/path1/file1", "/path2/file2", "/path2/file2"); |
252 |
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check_combine ("path1/file1", "/path2/file2", "/path2/file2"); |
253 |
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check_combine ("/path1/file1", "path2/file2", "/path1/path2/file2"); |
254 |
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check_combine ("path1/file1", "path2/file2", "path1/path2/file2"); |
255 |
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check_combine ("/path1", "/path2", "/path2"); |
256 |
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check_combine ("path1", "/path2", "/path2"); |
257 |
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check_combine ("/path1", "path2", "/path2"); |
258 |
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check_combine ("path1", "path2", "path2"); |
259 |
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260 |
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check_normalize ("", NULL); |
261 |
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check_normalize ("/", NULL); |
262 |
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check_normalize ("path1/file1", NULL); |
263 |
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check_normalize ("/path1/file1", NULL); |
264 |
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check_normalize ("/path1//file1", "/path1/file1"); |
265 |
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check_normalize ("//path1/file1", "/path1/file1"); |
266 |
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check_normalize ("///////x////////y///////z////////", "/x/y/z"); |
267 |
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check_normalize ("/a/b/../c/d/../e/../../f/g/../h", "/a/f/h"); |
268 |
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check_normalize ("//a//b//..//c//d//..//e//..//..//f//g//..//h", "/a/f/h"); |
269 |
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check_normalize ("../a", NULL); |
270 |
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check_normalize ("a/../../b", "../b"); |
271 |
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check_normalize ("/../a", "/a"); |
272 |
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check_normalize ("/a/../../b", "/b"); |
273 |
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check_normalize ("./b/./c/.d/..e/./f", "b/c/.d/..e/f"); |
274 |
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check_normalize ("/b/././././e", "/b/e"); |
275 |
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check_normalize (".", ""); /* maybe the result should be "."? */ |
276 |
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check_normalize ("/.", "/"); |
277 |
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check_normalize ("./", ""); /* maybe the result should be "."? */ |
278 |
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check_normalize ("/a/b/..", "/a"); |
279 |
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check_normalize ("/a/b/../..", "/"); |
280 |
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check_normalize ("/a/b/../../..", "/"); |
281 |
|
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check_normalize ("a/b/..", "a"); |
282 |
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check_normalize ("a/b/../..", ""); |
283 |
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check_normalize ("a/b/../../..", ".."); |
284 |
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285 |
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check_combine_and_normalize ("/path1/file1", "/path2/file2", "/path2/file2"); |
286 |
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check_combine_and_normalize ("path1/file1", "/path2/file2", "/path2/file2"); |
287 |
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check_combine_and_normalize ("/path1/file1", "path2/file2", "/path1/path2/file2"); |
288 |
|
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check_combine_and_normalize ("/path1", "/path2", "/path2"); |
289 |
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check_combine_and_normalize ("path1", "/path2", "/path2"); |
290 |
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check_combine_and_normalize ("/path1", "path2", "/path2"); |
291 |
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check_combine_and_normalize ("/path1/file1/../u", "path2/x/../y/z/../a/b/..", "/path1/path2/y/a"); |
292 |
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check_combine_and_normalize ("/path1/file1", "/path2//file2", "/path2/file2"); |
293 |
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check_combine_and_normalize ("/path1/file1", "/..", "/"); |
294 |
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check_combine_and_normalize ("/path1/file1", "../x", "/x"); |
295 |
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check_combine_and_normalize ("/path1/file1", "../../../x", "/x"); |
296 |
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check_combine_and_normalize ("/path1/file1", "/.x/..x/...x/x", "/.x/..x/...x/x"); |
297 |
elmex |
1.1 |
|
298 |
root |
1.2 |
return (0); |
299 |
elmex |
1.1 |
} |
300 |
|
|
#endif |