1 /* $XConsortium: include.c,v 1.17 94/12/05 19:33:08 gildea Exp $ */
2 /*
3
4 Copyright (c) 1993, 1994 X Consortium
5
6 Permission is hereby granted, free of charge, to any person obtaining a copy
7 of this software and associated documentation files (the "Software"), to deal
8 in the Software without restriction, including without limitation the rights
9 to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
10 copies of the Software, and to permit persons to whom the Software is
11 furnished to do so, subject to the following conditions:
12
13 The above copyright notice and this permission notice shall be included in
14 all copies or substantial portions of the Software.
15
16 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
19 X CONSORTIUM BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
20 AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
21 CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
22
23 Except as contained in this notice, the name of the X Consortium shall not be
24 used in advertising or otherwise to promote the sale, use or other dealings
25 in this Software without prior written authorization from the X Consortium.
26
27 */
28
29
30 #include "def.h"
31 #include <string.h>
32
33 void remove_dotdot( char * );
34 int isdot( char * );
35 int isdotdot( char * );
36 int issymbolic(char * dir, char * component);
37 int exists_path(struct IncludesCollection*, char*);
38
39
40 extern struct inclist inclist[ MAXFILES ],
41 *inclistp;
42 extern char *includedirs[ ];
43 extern char *notdotdot[ ];
44 extern boolean show_where_not;
45 extern boolean warn_multiple;
46
inc_path(file,include,dot,incCollection)47 struct inclist *inc_path(file, include, dot, incCollection)
48 register char *file,
49 *include;
50 boolean dot;
51 struct IncludesCollection* incCollection;
52 {
53 static char path[ BUFSIZ ];
54 register char **pp, *p;
55 register struct inclist *ip;
56 struct stat st;
57 boolean found = FALSE;
58
59 /*
60 * Check all previously found include files for a path that
61 * has already been expanded.
62 */
63 for (ip = inclist; ip->i_file; ip++)
64 if ((strcmp(ip->i_incstring, include) == 0) && !ip->i_included_sym)
65 {
66 found = TRUE;
67 break;
68 }
69
70 /*
71 * If the path was surrounded by "" or is an absolute path,
72 * then check the exact path provided.
73 */
74 // FIXME: creates duplicates in the dependency files if absolute paths are
75 // given, which certainly is not the intended behavior. Also it slows down
76 // makedepend performance considerably.
77 // if (!found && (dot || *include == '/')) {
78 //
79 // if ((exists_path(incCollection, include)) && stat(include, &st) == 0 && !( st.st_mode & S_IFDIR)) {
80 // ip = newinclude(include, include);
81 // found = TRUE;
82 // }
83 // else if (show_where_not)
84 // warning1("\tnot in %s\n", include);
85 // }
86
87 /*
88 * See if this include file is in the directory of the
89 * file being compiled.
90 */
91 if (!found) {
92 for (p=file+strlen(file); p>file; p--)
93 if (*p == '/')
94 break;
95 if (p == file)
96 strcpy(path, include);
97 else {
98 strncpy(path, file, (p-file) + 1);
99 path[ (p-file) + 1 ] = '\0';
100 strcpy(path + (p-file) + 1, include);
101 }
102 remove_dotdot(path);
103 if ((exists_path(incCollection, path)) && stat(path, &st) == 0 && !( st.st_mode & S_IFDIR)) {
104 ip = newinclude(path, include);
105 found = TRUE;
106 }
107 else if (show_where_not)
108 warning1("\tnot in %s\n", path);
109 }
110
111 /*
112 * Check the include directories specified. (standard include dir
113 * should be at the end.)
114 */
115 if (!found)
116 for (pp = includedirs; *pp; pp++) {
117 sprintf(path, "%s/%s", *pp, include);
118 remove_dotdot(path);
119 if ((exists_path(incCollection, path)) && stat(path, &st) == 0 && !(st.st_mode & S_IFDIR)) {
120 ip = newinclude(path, include);
121 found = TRUE;
122 break;
123 }
124 else if (show_where_not)
125 warning1("\tnot in %s\n", path);
126 }
127
128 if (!found)
129 ip = NULL;
130 return(ip);
131 }
132
exists_path(incCollection,path)133 int exists_path(incCollection, path)
134 struct IncludesCollection* incCollection;
135 char* path;
136 {
137 convert_slashes(path);
138 return call_IncludesCollection_exists(incCollection, path);
139 }
140
141 /*
142 * Occasionally, pathnames are created that look like .../x/../y
143 * Any of the 'x/..' sequences within the name can be eliminated.
144 * (but only if 'x' is not a symbolic link!!)
145 */
remove_dotdot(path)146 void remove_dotdot(path)
147 char *path;
148 {
149 register char *end, *from, *to, **cp;
150 char *components[ MAXFILES ],
151 newpath[ BUFSIZ ];
152 boolean component_copied;
153
154 /*
155 * slice path up into components.
156 */
157 to = newpath;
158 if (*path == '/')
159 *to++ = '/';
160 *to = '\0';
161 cp = components;
162 for (from=end=path; *end; end++)
163 if (*end == '/') {
164 while (*end == '/')
165 *end++ = '\0';
166 if (*from)
167 *cp++ = from;
168 from = end;
169 }
170 *cp++ = from;
171 *cp = NULL;
172
173 /*
174 * Recursively remove all 'x/..' component pairs.
175 */
176 cp = components;
177 while(*cp) {
178 if (!isdot(*cp) && !isdotdot(*cp) && isdotdot(*(cp+1))
179 && !issymbolic(newpath, *cp))
180 {
181 char **fp = cp + 2;
182 char **tp = cp;
183
184 do
185 *tp++ = *fp; /* move all the pointers down */
186 while (*fp++);
187 if (cp != components)
188 cp--; /* go back and check for nested ".." */
189 } else {
190 cp++;
191 }
192 }
193 /*
194 * Concatenate the remaining path elements.
195 */
196 cp = components;
197 component_copied = FALSE;
198 while(*cp) {
199 if (component_copied)
200 *to++ = '/';
201 component_copied = TRUE;
202 for (from = *cp; *from; )
203 *to++ = *from++;
204 *to = '\0';
205 cp++;
206 }
207 *to++ = '\0';
208
209 /*
210 * copy the reconstituted path back to our pointer.
211 */
212 strcpy(path, newpath);
213 }
214
isdot(p)215 int isdot(p)
216 register char *p;
217 {
218 if(p && *p++ == '.' && *p++ == '\0')
219 return(TRUE);
220 return(FALSE);
221 }
222
isdotdot(p)223 int isdotdot(p)
224 register char *p;
225 {
226 if(p && *p++ == '.' && *p++ == '.' && *p++ == '\0')
227 return(TRUE);
228 return(FALSE);
229 }
230
issymbolic(dir,component)231 int issymbolic(dir, component)
232 register char *dir, *component;
233 {
234 #ifdef S_IFLNK
235 struct stat st;
236 char buf[ BUFSIZ ], **pp;
237
238 sprintf(buf, "%s%s%s", dir, *dir ? "/" : "", component);
239 for (pp=notdotdot; *pp; pp++)
240 if (strcmp(*pp, buf) == 0)
241 return (TRUE);
242 if (lstat(buf, &st) == 0
243 && (st.st_mode & S_IFMT) == S_IFLNK) {
244 *pp++ = copy(buf);
245 if (pp >= ¬dotdot[ MAXDIRS ])
246 fatalerr("out of .. dirs, increase MAXDIRS\n");
247 return(TRUE);
248 }
249 #endif
250 return(FALSE);
251 }
252
253 /*
254 * Add an include file to the list of those included by 'file'.
255 */
newinclude(newfile,incstring)256 struct inclist *newinclude(newfile, incstring)
257 register char *newfile, *incstring;
258 {
259 register struct inclist *ip;
260
261 /*
262 * First, put this file on the global list of include files.
263 */
264 ip = inclistp++;
265 if (inclistp == inclist + MAXFILES - 1)
266 fatalerr("out of space: increase MAXFILES\n");
267 ip->i_file = copy(newfile);
268 ip->i_included_sym = FALSE;
269 if (incstring == NULL)
270 ip->i_incstring = ip->i_file;
271 else
272 ip->i_incstring = copy(incstring);
273
274 return(ip);
275 }
276
included_by(ip,newfile)277 void included_by(ip, newfile)
278 register struct inclist *ip, *newfile;
279 {
280 register int i;
281
282 if (ip == NULL)
283 return;
284 /*
285 * Put this include file (newfile) on the list of files included
286 * by 'file'. If 'file' is NULL, then it is not an include
287 * file itself (i.e. was probably mentioned on the command line).
288 * If it is already on the list, don't stick it on again.
289 */
290 if (ip->i_list == NULL)
291 ip->i_list = (struct inclist **)
292 malloc(sizeof(struct inclist *) * ++ip->i_listlen);
293 else {
294 for (i=0; i<ip->i_listlen; i++)
295 if (ip->i_list[ i ] == newfile) {
296 i = strlen(newfile->i_file);
297 if (!ip->i_included_sym &&
298 !(i > 2 &&
299 newfile->i_file[i-1] == 'c' &&
300 newfile->i_file[i-2] == '.'))
301 {
302 /* only complain if ip has */
303 /* no #include SYMBOL lines */
304 /* and is not a .c file */
305 if (warn_multiple)
306 {
307 warning("%s includes %s more than once!\n",
308 ip->i_file, newfile->i_file);
309 warning1("Already have\n");
310 for (i=0; i<ip->i_listlen; i++)
311 warning1("\t%s\n", ip->i_list[i]->i_file);
312 }
313 }
314 return;
315 }
316 ip->i_list = (struct inclist **) realloc(ip->i_list,
317 sizeof(struct inclist *) * ++ip->i_listlen);
318 }
319 ip->i_list[ ip->i_listlen-1 ] = newfile;
320 }
321
inc_clean()322 void inc_clean ()
323 {
324 register struct inclist *ip;
325
326 for (ip = inclist; ip < inclistp; ip++) {
327 ip->i_marked = FALSE;
328 }
329 }
330