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4a5121b5 | 1 | /* Utility to update paths from internal to external forms. |
9311a396 | 2 | Copyright (C) 1997, 1998, 1999, 2000 Free Software Foundation, Inc. |
4a5121b5 | 3 | |
1322177d | 4 | This file is part of GCC. |
4a5121b5 | 5 | |
1322177d LB |
6 | GCC is free software; you can redistribute it and/or modify it under |
7 | the terms of the GNU Library General Public License as published by | |
8 | the Free Software Foundation; either version 2 of the License, or (at | |
9 | your option) any later version. | |
4a5121b5 JL |
10 | |
11 | GCC 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 GNU | |
14 | Library General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU Library General Public | |
17 | License along with GCC; see the file COPYING. If not, write to the Free | |
18 | Software Foundation, Inc., 59 Temple Place - Suite 330, | |
19 | Boston, MA 02111-1307, USA. */ | |
20 | ||
21 | /* This file contains routines to update a path, both to canonicalize | |
22 | the directory format and to handle any prefix translation. | |
23 | ||
24 | This file must be compiled with -DPREFIX= to specify the "prefix" | |
25 | value used by configure. If a filename does not begin with this | |
26 | prefix, it will not be affected other than by directory canonicalization. | |
27 | ||
28 | Each caller of 'update_path' may specify both a filename and | |
29 | a translation prefix and consist of the name of the package that contains | |
30 | the file ("@GCC", "@BINUTIL", "@GNU", etc). | |
31 | ||
32 | If the prefix is not specified, the filename will only undergo | |
33 | directory canonicalization. | |
34 | ||
35 | If it is specified, the string given by PREFIX will be replaced | |
36 | by the specified prefix (with a '@' in front unless the prefix begins | |
37 | with a '$') and further translation will be done as follows | |
38 | until none of the two conditions below are met: | |
39 | ||
40 | 1) If the filename begins with '@', the string between the '@' and | |
41 | the end of the name or the first '/' or directory separator will | |
42 | be considered a "key" and looked up as follows: | |
43 | ||
44 | -- If this is a Win32 OS, then the Registry will be examined for | |
45 | an entry of "key" in | |
46 | ||
f4ab28e3 | 47 | HKEY_LOCAL_MACHINE\SOFTWARE\Free Software Foundation\<KEY> |
4a5121b5 | 48 | |
f4ab28e3 MK |
49 | if found, that value will be used. <KEY> defaults to GCC version |
50 | string, but can be overridden at configuration time. | |
4a5121b5 JL |
51 | |
52 | -- If not found (or not a Win32 OS), the environment variable | |
53 | key_ROOT (the value of "key" concatenated with the constant "_ROOT") | |
54 | is tried. If that fails, then PREFIX (see above) is used. | |
55 | ||
56 | 2) If the filename begins with a '$', the rest of the string up | |
57 | to the end or the first '/' or directory separator will be used | |
58 | as an environment variable, whose value will be returned. | |
59 | ||
60 | Once all this is done, any '/' will be converted to DIR_SEPARATOR, | |
61 | if they are different. | |
62 | ||
63 | NOTE: using resolve_keyed_path under Win32 requires linking with | |
64 | advapi32.dll. */ | |
65 | ||
66 | ||
67 | #include "config.h" | |
670ee920 | 68 | #include "system.h" |
f4ab28e3 | 69 | #if defined(_WIN32) && defined(ENABLE_WIN32_REGISTRY) |
4a5121b5 JL |
70 | #include <windows.h> |
71 | #endif | |
460ee112 | 72 | #include "prefix.h" |
4a5121b5 | 73 | |
460ee112 | 74 | static const char *std_prefix = PREFIX; |
6ed4bb9a | 75 | |
13536812 | 76 | static const char *get_key_value PARAMS ((char *)); |
51c04256 | 77 | static char *translate_name PARAMS ((char *)); |
13536812 | 78 | static char *save_string PARAMS ((const char *, int)); |
51c04256 | 79 | static void tr PARAMS ((char *, int, int)); |
4a5121b5 | 80 | |
f4ab28e3 | 81 | #if defined(_WIN32) && defined(ENABLE_WIN32_REGISTRY) |
13536812 | 82 | static char *lookup_key PARAMS ((char *)); |
4a5121b5 JL |
83 | static HKEY reg_key = (HKEY) INVALID_HANDLE_VALUE; |
84 | #endif | |
85 | ||
4a5121b5 JL |
86 | /* Given KEY, as above, return its value. */ |
87 | ||
460ee112 | 88 | static const char * |
4a5121b5 JL |
89 | get_key_value (key) |
90 | char *key; | |
91 | { | |
460ee112 | 92 | const char *prefix = 0; |
6ed4bb9a | 93 | char *temp = 0; |
4a5121b5 | 94 | |
f4ab28e3 | 95 | #if defined(_WIN32) && defined(ENABLE_WIN32_REGISTRY) |
4a5121b5 JL |
96 | prefix = lookup_key (key); |
97 | #endif | |
98 | ||
99 | if (prefix == 0) | |
d4f2852f | 100 | prefix = getenv (temp = concat (key, "_ROOT", NULL)); |
4a5121b5 JL |
101 | |
102 | if (prefix == 0) | |
6ed4bb9a MM |
103 | prefix = std_prefix; |
104 | ||
105 | if (temp) | |
106 | free (temp); | |
4a5121b5 JL |
107 | |
108 | return prefix; | |
109 | } | |
110 | ||
111 | /* Concatenate a sequence of strings, returning the result. | |
112 | ||
113 | This function is based on the one in libiberty. */ | |
114 | ||
2778b98d | 115 | char * |
13536812 | 116 | concat VPARAMS ((const char *first, ...)) |
4a5121b5 JL |
117 | { |
118 | register int length; | |
119 | register char *newstr; | |
120 | register char *end; | |
2778b98d | 121 | register const char *arg; |
4a5121b5 | 122 | va_list args; |
5148a72b | 123 | #ifndef ANSI_PROTOTYPES |
2778b98d | 124 | const char *first; |
4a5121b5 JL |
125 | #endif |
126 | ||
127 | /* First compute the size of the result and get sufficient memory. */ | |
128 | ||
129 | VA_START (args, first); | |
5148a72b | 130 | #ifndef ANSI_PROTOTYPES |
2778b98d | 131 | first = va_arg (args, const char *); |
4a5121b5 JL |
132 | #endif |
133 | ||
134 | arg = first; | |
135 | length = 0; | |
136 | ||
137 | while (arg != 0) | |
138 | { | |
139 | length += strlen (arg); | |
2778b98d | 140 | arg = va_arg (args, const char *); |
4a5121b5 JL |
141 | } |
142 | ||
3ea6b476 | 143 | newstr = (char *) xmalloc (length + 1); |
4a5121b5 JL |
144 | va_end (args); |
145 | ||
146 | /* Now copy the individual pieces to the result string. */ | |
147 | ||
148 | VA_START (args, first); | |
5148a72b | 149 | #ifndef ANSI_PROTOTYPES |
4a5121b5 JL |
150 | first = va_arg (args, char *); |
151 | #endif | |
152 | ||
153 | end = newstr; | |
154 | arg = first; | |
155 | while (arg != 0) | |
156 | { | |
157 | while (*arg) | |
158 | *end++ = *arg++; | |
2778b98d | 159 | arg = va_arg (args, const char *); |
4a5121b5 JL |
160 | } |
161 | *end = '\000'; | |
162 | va_end (args); | |
163 | ||
164 | return (newstr); | |
165 | } | |
166 | ||
167 | /* Return a copy of a string that has been placed in the heap. */ | |
168 | ||
169 | static char * | |
170 | save_string (s, len) | |
460ee112 KG |
171 | const char *s; |
172 | int len; | |
4a5121b5 | 173 | { |
460ee112 | 174 | register char *result = xmalloc (len + 1); |
4a5121b5 | 175 | |
4e135bdd | 176 | memcpy (result, s, len); |
4a5121b5 JL |
177 | result[len] = 0; |
178 | return result; | |
179 | } | |
180 | ||
f4ab28e3 | 181 | #if defined(_WIN32) && defined(ENABLE_WIN32_REGISTRY) |
4a5121b5 JL |
182 | |
183 | /* Look up "key" in the registry, as above. */ | |
184 | ||
185 | static char * | |
186 | lookup_key (key) | |
187 | char *key; | |
188 | { | |
189 | char *dst; | |
190 | DWORD size; | |
191 | DWORD type; | |
192 | LONG res; | |
193 | ||
194 | if (reg_key == (HKEY) INVALID_HANDLE_VALUE) | |
195 | { | |
196 | res = RegOpenKeyExA (HKEY_LOCAL_MACHINE, "SOFTWARE", 0, | |
197 | KEY_READ, ®_key); | |
198 | ||
199 | if (res == ERROR_SUCCESS) | |
200 | res = RegOpenKeyExA (reg_key, "Free Software Foundation", 0, | |
201 | KEY_READ, ®_key); | |
202 | ||
f4ab28e3 MK |
203 | if (res == ERROR_SUCCESS) |
204 | res = RegOpenKeyExA (reg_key, WIN32_REGISTRY_KEY, 0, | |
205 | KEY_READ, ®_key); | |
206 | ||
4a5121b5 JL |
207 | if (res != ERROR_SUCCESS) |
208 | { | |
209 | reg_key = (HKEY) INVALID_HANDLE_VALUE; | |
210 | return 0; | |
211 | } | |
212 | } | |
213 | ||
214 | size = 32; | |
3ea6b476 | 215 | dst = (char *) xmalloc (size); |
4a5121b5 JL |
216 | |
217 | res = RegQueryValueExA (reg_key, key, 0, &type, dst, &size); | |
218 | if (res == ERROR_MORE_DATA && type == REG_SZ) | |
219 | { | |
3ea6b476 | 220 | dst = (char *) xrealloc (dst, size); |
4a5121b5 JL |
221 | res = RegQueryValueExA (reg_key, key, 0, &type, dst, &size); |
222 | } | |
223 | ||
224 | if (type != REG_SZ || res != ERROR_SUCCESS) | |
225 | { | |
226 | free (dst); | |
227 | dst = 0; | |
228 | } | |
229 | ||
230 | return dst; | |
231 | } | |
232 | #endif | |
233 | ||
51c04256 NB |
234 | /* If NAME, a malloc-ed string, starts with a '@' or '$', apply the |
235 | translation rules above and return a newly malloc-ed name. | |
236 | Otherwise, return the given name. */ | |
4a5121b5 | 237 | |
51c04256 | 238 | static char * |
4a5121b5 | 239 | translate_name (name) |
51c04256 | 240 | char *name; |
4a5121b5 | 241 | { |
51c04256 NB |
242 | char code; |
243 | char *key, *old_name; | |
244 | const char *prefix; | |
4a5121b5 JL |
245 | int keylen; |
246 | ||
51c04256 NB |
247 | for (;;) |
248 | { | |
249 | code = name[0]; | |
250 | if (code != '@' && code != '$') | |
251 | break; | |
252 | ||
253 | for (keylen = 0; | |
254 | (name[keylen + 1] != 0 && !IS_DIR_SEPARATOR (name[keylen + 1])); | |
255 | keylen++) | |
256 | ; | |
257 | ||
258 | key = (char *) alloca (keylen + 1); | |
259 | strncpy (key, &name[1], keylen); | |
260 | key[keylen] = 0; | |
261 | ||
262 | if (code == '@') | |
263 | { | |
264 | prefix = get_key_value (key); | |
265 | if (prefix == 0) | |
266 | prefix = std_prefix; | |
267 | } | |
268 | else | |
269 | prefix = getenv (key); | |
4a5121b5 | 270 | |
51c04256 NB |
271 | if (prefix == 0) |
272 | prefix = PREFIX; | |
4a5121b5 | 273 | |
51c04256 NB |
274 | /* We used to strip trailing DIR_SEPARATORs here, but that can |
275 | sometimes yield a result with no separator when one was coded | |
276 | and intended by the user, causing two path components to run | |
277 | together. */ | |
4a5121b5 | 278 | |
51c04256 NB |
279 | old_name = name; |
280 | name = concat (prefix, &name[keylen + 1], NULL); | |
281 | free (old_name); | |
4a5121b5 | 282 | } |
e5e809f4 | 283 | |
51c04256 NB |
284 | return name; |
285 | } | |
4a5121b5 | 286 | |
51c04256 NB |
287 | /* In a NUL-terminated STRING, replace character C1 with C2 in-place. */ |
288 | static void | |
289 | tr (string, c1, c2) | |
290 | char *string; | |
291 | int c1, c2; | |
292 | { | |
293 | do | |
294 | { | |
295 | if (*string == c1) | |
296 | *string = c2; | |
297 | } | |
298 | while (*string++); | |
4a5121b5 JL |
299 | } |
300 | ||
51c04256 NB |
301 | /* Update PATH using KEY if PATH starts with PREFIX. The returned |
302 | string is always malloc-ed, and the caller is responsible for | |
303 | freeing it. */ | |
4a5121b5 | 304 | |
51c04256 | 305 | char * |
4a5121b5 | 306 | update_path (path, key) |
460ee112 KG |
307 | const char *path; |
308 | const char *key; | |
4a5121b5 | 309 | { |
51c04256 NB |
310 | char *result; |
311 | ||
6ed4bb9a | 312 | if (! strncmp (path, std_prefix, strlen (std_prefix)) && key != 0) |
4a5121b5 | 313 | { |
51c04256 | 314 | bool free_key = false; |
4a5121b5 | 315 | |
51c04256 NB |
316 | if (key[0] != '$') |
317 | { | |
318 | key = concat ("@", key, NULL); | |
319 | free_key = true; | |
320 | } | |
321 | ||
322 | result = concat (key, &path[strlen (std_prefix)], NULL); | |
323 | if (free_key) | |
324 | free ((char *) key); | |
325 | result = translate_name (result); | |
4a5121b5 | 326 | } |
51c04256 NB |
327 | else |
328 | result = xstrdup (path); | |
509781a4 | 329 | |
93284395 | 330 | #ifdef UPDATE_PATH_HOST_CANONICALIZE |
51c04256 NB |
331 | /* Perform host dependent canonicalization when needed. */ |
332 | UPDATE_PATH_HOST_CANONICALIZE (path); | |
93284395 ME |
333 | #endif |
334 | ||
509781a4 | 335 | #ifdef DIR_SEPARATOR_2 |
dc297297 | 336 | /* Convert DIR_SEPARATOR_2 to DIR_SEPARATOR. */ |
51c04256 NB |
337 | if (DIR_SEPARATOR_2 != DIR_SEPARATOR) |
338 | tr (result, DIR_SEPARATOR_2, DIR_SEPARATOR); | |
509781a4 | 339 | #endif |
51c04256 | 340 | |
509781a4 | 341 | #if defined (DIR_SEPARATOR) && !defined (DIR_SEPARATOR_2) |
4a5121b5 | 342 | if (DIR_SEPARATOR != '/') |
51c04256 | 343 | tr (result, '/', DIR_SEPARATOR); |
4a5121b5 JL |
344 | #endif |
345 | ||
51c04256 | 346 | return result; |
4a5121b5 | 347 | } |
6ed4bb9a MM |
348 | |
349 | /* Reset the standard prefix */ | |
350 | void | |
351 | set_std_prefix (prefix, len) | |
460ee112 KG |
352 | const char *prefix; |
353 | int len; | |
6ed4bb9a MM |
354 | { |
355 | std_prefix = save_string (prefix, len); | |
356 | } |