1 /* Handle CLASSPATH, -classpath, and path searching.
3 Copyright (C) 1998, 1999 Free Software Foundation, Inc.
5 This program is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation; either version 2, or (at your option)
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with GNU CC; see the file COPYING. If not, write to
17 the Free Software Foundation, 59 Temple Place - Suite 330,
18 Boston, MA 02111-1307, USA.
20 Java and all Java-based marks are trademarks or registered trademarks
21 of Sun Microsystems, Inc. in the United States and other countries.
22 The Free Software Foundation is independent of Sun Microsystems, Inc. */
24 /* Written by Tom Tromey <tromey@cygnus.com>, October 1998. */
31 /* Some boilerplate that really belongs in a header. */
33 #ifndef GET_ENV_PATH_LIST
34 #define GET_ENV_PATH_LIST(VAR,NAME) do { (VAR) = getenv (NAME); } while (0)
43 /* Possible flag values. */
47 /* We keep linked lists of directory names. A ``directory'' can be
48 either an ordinary directory or a .zip file. */
56 static void free_entry PROTO ((struct entry **));
57 static void append_entry PROTO ((struct entry **, struct entry *));
58 static void add_entry PROTO ((struct entry **, const char *, int));
59 static void add_path PROTO ((struct entry **, const char *, int));
61 /* We support several different ways to set the class path.
63 built-in system directory (only libgcj.zip)
64 CLASSPATH environment variable
65 -CLASSPATH overrides CLASSPATH
66 -classpath option - overrides CLASSPATH, -CLASSPATH, and built-in
67 -I prepends path to list
69 We implement this by keeping several path lists, and then simply
70 ignoring the ones which are not relevant. */
72 /* This holds all the -I directories. */
73 static struct entry *include_dirs;
75 /* This holds the CLASSPATH environment variable. */
76 static struct entry *classpath_env;
78 /* This holds the -CLASSPATH command-line option. */
79 static struct entry *classpath_u;
81 /* This holds the -classpath command-line option. */
82 static struct entry *classpath_l;
84 /* This holds the default directories. Some of these will have the
86 static struct entry *sys_dirs;
88 /* This is the sealed list. It is just a combination of other lists. */
89 static struct entry *sealed;
91 /* We keep track of the longest path we've seen. */
92 static int longest_path = 0;
102 for (e = *entp; e; e = n)
112 append_entry (entp, ent)
116 /* It doesn't matter if this is slow, since it is run only at
117 startup, and then infrequently. */
120 /* Find end of list. */
121 for (e = *entp; e && e->next; e = e->next)
131 add_entry (entp, filename, is_system)
133 const char *filename;
139 n = (struct entry *) ALLOC (sizeof (struct entry));
140 n->flags = is_system ? FLAG_SYSTEM : 0;
143 len = strlen (filename);
144 if (len > 4 && (strcmp (filename + len - 4, ".zip") == 0
145 || strcmp (filename + len - 4, ".jar") == 0))
147 n->flags |= FLAG_ZIP;
148 /* If the user uses -classpath then he'll have to include
149 libgcj.zip in the value. We check for this in a simplistic
150 way. Symlinks will fool this test. This is only used for
151 -MM and -MMD, so it probably isn't terribly important. */
152 if (! strcmp (filename, LIBGCJ_ZIP_FILE))
153 n->flags |= FLAG_SYSTEM;
156 /* Note that we add a trailing separator to `.zip' names as well.
157 This is a little hack that lets the searching code in jcf-io.c
158 work more easily. Eww. */
159 if (filename[len - 1] != '/' && filename[len - 1] != DIR_SEPARATOR)
161 char *f2 = (char *) alloca (len + 2);
162 strcpy (f2, filename);
163 f2[len] = DIR_SEPARATOR;
165 n->name = xstrdup (f2);
169 n->name = xstrdup (filename);
171 if (len > longest_path)
174 append_entry (entp, n);
178 add_path (entp, cp, is_system)
183 const char *startp, *endp;
187 char *buf = (char *) alloca (strlen (cp) + 3);
191 if (! *endp || *endp == PATH_SEPARATOR)
196 buf[1] = DIR_SEPARATOR;
201 strncpy (buf, startp, endp - startp);
202 buf[endp - startp] = '\0';
204 add_entry (entp, buf, is_system);
216 /* Initialize the path module. */
225 add_entry (&sys_dirs, ".", 0);
227 sep[0] = DIR_SEPARATOR;
230 GET_ENV_PATH_LIST (cp, "GCC_EXEC_PREFIX");
233 try = alloca (strlen (cp) + 50);
234 /* The exec prefix can be something like
235 /usr/local/bin/../lib/gcc-lib/. We want to change this
236 into a pointer to the share directory. We support two
237 configurations: one where prefix and exec-prefix are the
238 same, and one where exec-prefix is `prefix/SOMETHING'. */
240 strcat (try, DIR_UP);
242 strcat (try, DIR_UP);
246 strcpy (try + len, "share");
248 strcat (try, "libgcj.zip");
249 if (! stat (try, &stat_b))
251 add_entry (&sys_dirs, try, 1);
256 strcpy (try + len, DIR_UP);
258 strcat (try, "share");
260 strcat (try, "libgcj.zip");
261 if (! stat (try, &stat_b))
263 add_entry (&sys_dirs, try, 1);
270 /* Desperation: use the installed one. */
271 add_entry (&sys_dirs, LIBGCJ_ZIP_FILE, 1);
274 GET_ENV_PATH_LIST (cp, "CLASSPATH");
275 add_path (&classpath_env, cp, 0);
278 /* Call this when -classpath is seen on the command line. */
280 jcf_path_classpath_arg (path)
283 free_entry (&classpath_l);
284 add_path (&classpath_l, path, 0);
287 /* Call this when -CLASSPATH is seen on the command line. */
289 jcf_path_CLASSPATH_arg (path)
292 free_entry (&classpath_u);
293 add_path (&classpath_u, path, 0);
296 /* Call this when -I is seen on the command line. */
298 jcf_path_include_arg (path)
301 add_entry (&include_dirs, path, 0);
304 /* We `seal' the path by linking everything into one big list. Then
305 we provide a way to iterate through the sealed list. */
310 struct entry *secondary;
312 sealed = include_dirs;
317 secondary = classpath_l;
321 else if (classpath_u)
323 secondary = classpath_u;
328 secondary = classpath_env;
329 classpath_env = NULL;
332 free_entry (&classpath_l);
333 free_entry (&classpath_u);
334 free_entry (&classpath_env);
336 append_entry (&sealed, secondary);
340 append_entry (&sealed, sys_dirs);
344 free_entry (&sys_dirs);
350 return (void *) sealed;
357 struct entry *ent = (struct entry *) x;
358 return (void *) ent->next;
361 /* We guarantee that the return path will either be a zip file, or it
362 will end with a directory separator. */
367 struct entry *ent = (struct entry *) x;
372 jcf_path_is_zipfile (x)
375 struct entry *ent = (struct entry *) x;
376 return (ent->flags & FLAG_ZIP);
380 jcf_path_is_system (x)
383 struct entry *ent = (struct entry *) x;
384 return (ent->flags & FLAG_SYSTEM);