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-rw-r--r--include.c319
1 files changed, 319 insertions, 0 deletions
diff --git a/include.c b/include.c
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+/* $Xorg: include.c,v 1.4 2001/02/09 02:03:16 xorgcvs Exp $ */
+/*
+
+Copyright (c) 1993, 1994, 1998 The Open Group
+
+Permission to use, copy, modify, distribute, and sell this software and its
+documentation for any purpose is hereby granted without fee, provided that
+the above copyright notice appear in all copies and that both that
+copyright notice and this permission notice appear in supporting
+documentation.
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+Except as contained in this notice, the name of The Open Group shall not be
+used in advertising or otherwise to promote the sale, use or other dealings
+in this Software without prior written authorization from The Open Group.
+
+*/
+
+
+#include "def.h"
+
+extern struct inclist inclist[ MAXFILES ],
+ *inclistp;
+extern char *includedirs[ ];
+extern char *notdotdot[ ];
+extern boolean show_where_not;
+extern boolean warn_multiple;
+
+boolean
+isdot(p)
+ register char *p;
+{
+ if(p && *p++ == '.' && *p++ == '\0')
+ return(TRUE);
+ return(FALSE);
+}
+
+boolean
+isdotdot(p)
+ register char *p;
+{
+ if(p && *p++ == '.' && *p++ == '.' && *p++ == '\0')
+ return(TRUE);
+ return(FALSE);
+}
+
+boolean
+issymbolic(dir, component)
+ register char *dir, *component;
+{
+#ifdef S_IFLNK
+ struct stat st;
+ char buf[ BUFSIZ ], **pp;
+
+ sprintf(buf, "%s%s%s", dir, *dir ? "/" : "", component);
+ for (pp=notdotdot; *pp; pp++)
+ if (strcmp(*pp, buf) == 0)
+ return (TRUE);
+ if (lstat(buf, &st) == 0
+ && (st.st_mode & S_IFMT) == S_IFLNK) {
+ *pp++ = copy(buf);
+ if (pp >= &notdotdot[ MAXDIRS ])
+ fatalerr("out of .. dirs, increase MAXDIRS\n");
+ return(TRUE);
+ }
+#endif
+ return(FALSE);
+}
+
+/*
+ * Occasionally, pathnames are created that look like .../x/../y
+ * Any of the 'x/..' sequences within the name can be eliminated.
+ * (but only if 'x' is not a symbolic link!!)
+ */
+void
+remove_dotdot(path)
+ char *path;
+{
+ register char *end, *from, *to, **cp;
+ char *components[ MAXFILES ],
+ newpath[ BUFSIZ ];
+ boolean component_copied;
+
+ /*
+ * slice path up into components.
+ */
+ to = newpath;
+ if (*path == '/')
+ *to++ = '/';
+ *to = '\0';
+ cp = components;
+ for (from=end=path; *end; end++)
+ if (*end == '/') {
+ while (*end == '/')
+ *end++ = '\0';
+ if (*from)
+ *cp++ = from;
+ from = end;
+ }
+ *cp++ = from;
+ *cp = NULL;
+
+ /*
+ * Recursively remove all 'x/..' component pairs.
+ */
+ cp = components;
+ while(*cp) {
+ if (!isdot(*cp) && !isdotdot(*cp) && isdotdot(*(cp+1))
+ && !issymbolic(newpath, *cp))
+ {
+ char **fp = cp + 2;
+ char **tp = cp;
+
+ do
+ *tp++ = *fp; /* move all the pointers down */
+ while (*fp++);
+ if (cp != components)
+ cp--; /* go back and check for nested ".." */
+ } else {
+ cp++;
+ }
+ }
+ /*
+ * Concatenate the remaining path elements.
+ */
+ cp = components;
+ component_copied = FALSE;
+ while(*cp) {
+ if (component_copied)
+ *to++ = '/';
+ component_copied = TRUE;
+ for (from = *cp; *from; )
+ *to++ = *from++;
+ *to = '\0';
+ cp++;
+ }
+ *to++ = '\0';
+
+ /*
+ * copy the reconstituted path back to our pointer.
+ */
+ strcpy(path, newpath);
+}
+
+/*
+ * Add an include file to the list of those included by 'file'.
+ */
+struct inclist *newinclude(newfile, incstring)
+ register char *newfile, *incstring;
+{
+ register struct inclist *ip;
+
+ /*
+ * First, put this file on the global list of include files.
+ */
+ ip = inclistp++;
+ if (inclistp == inclist + MAXFILES - 1)
+ fatalerr("out of space: increase MAXFILES\n");
+ ip->i_file = copy(newfile);
+
+ if (incstring == NULL)
+ ip->i_incstring = ip->i_file;
+ else
+ ip->i_incstring = copy(incstring);
+
+ return(ip);
+}
+
+void
+included_by(ip, newfile)
+ register struct inclist *ip, *newfile;
+{
+ register int i;
+
+ if (ip == NULL)
+ return;
+ /*
+ * Put this include file (newfile) on the list of files included
+ * by 'file'. If 'file' is NULL, then it is not an include
+ * file itself (i.e. was probably mentioned on the command line).
+ * If it is already on the list, don't stick it on again.
+ */
+ if (ip->i_list == NULL) {
+ ip->i_list = (struct inclist **)
+ malloc(sizeof(struct inclist *) * ++ip->i_listlen);
+ ip->i_merged = (boolean *)
+ malloc(sizeof(boolean) * ip->i_listlen);
+ } else {
+ for (i=0; i<ip->i_listlen; i++)
+ if (ip->i_list[ i ] == newfile) {
+ i = strlen(newfile->i_file);
+ if (!(ip->i_flags & INCLUDED_SYM) &&
+ !(i > 2 &&
+ newfile->i_file[i-1] == 'c' &&
+ newfile->i_file[i-2] == '.'))
+ {
+ /* only bitch if ip has */
+ /* no #include SYMBOL lines */
+ /* and is not a .c file */
+ if (warn_multiple)
+ {
+ warning("%s includes %s more than once!\n",
+ ip->i_file, newfile->i_file);
+ warning1("Already have\n");
+ for (i=0; i<ip->i_listlen; i++)
+ warning1("\t%s\n", ip->i_list[i]->i_file);
+ }
+ }
+ return;
+ }
+ ip->i_list = (struct inclist **) realloc(ip->i_list,
+ sizeof(struct inclist *) * ++ip->i_listlen);
+ ip->i_merged = (boolean *)
+ realloc(ip->i_merged, sizeof(boolean) * ip->i_listlen);
+ }
+ ip->i_list[ ip->i_listlen-1 ] = newfile;
+ ip->i_merged[ ip->i_listlen-1 ] = FALSE;
+}
+
+void
+inc_clean ()
+{
+ register struct inclist *ip;
+
+ for (ip = inclist; ip < inclistp; ip++) {
+ ip->i_flags &= ~MARKED;
+ }
+}
+
+struct inclist *inc_path(file, include, dot)
+ register char *file,
+ *include;
+ boolean dot;
+{
+ static char path[ BUFSIZ ];
+ register char **pp, *p;
+ register struct inclist *ip;
+ struct stat st;
+ boolean found = FALSE;
+
+ /*
+ * Check all previously found include files for a path that
+ * has already been expanded.
+ */
+ for (ip = inclist; ip->i_file; ip++)
+ if ((strcmp(ip->i_incstring, include) == 0) &&
+ !(ip->i_flags & INCLUDED_SYM))
+ {
+ found = TRUE;
+ break;
+ }
+
+ /*
+ * If the path was surrounded by "" or is an absolute path,
+ * then check the exact path provided.
+ */
+ if (!found && (dot || *include == '/')) {
+ if (stat(include, &st) == 0) {
+ ip = newinclude(include, include);
+ found = TRUE;
+ }
+ else if (show_where_not)
+ warning1("\tnot in %s\n", include);
+ }
+
+ /*
+ * If the path was surrounded by "" see if this include file is in the
+ * directory of the file being parsed.
+ */
+ if (!found && dot) {
+ for (p=file+strlen(file); p>file; p--)
+ if (*p == '/')
+ break;
+ if (p == file)
+ strcpy(path, include);
+ else {
+ strncpy(path, file, (p-file) + 1);
+ path[ (p-file) + 1 ] = '\0';
+ strcpy(path + (p-file) + 1, include);
+ }
+ remove_dotdot(path);
+ if (stat(path, &st) == 0) {
+ ip = newinclude(path, include);
+ found = TRUE;
+ }
+ else if (show_where_not)
+ warning1("\tnot in %s\n", path);
+ }
+
+ /*
+ * Check the include directories specified. (standard include dir
+ * should be at the end.)
+ */
+ if (!found)
+ for (pp = includedirs; *pp; pp++) {
+ sprintf(path, "%s/%s", *pp, include);
+ remove_dotdot(path);
+ if (stat(path, &st) == 0) {
+ ip = newinclude(path, include);
+ found = TRUE;
+ break;
+ }
+ else if (show_where_not)
+ warning1("\tnot in %s\n", path);
+ }
+
+ if (!found)
+ ip = NULL;
+ return(ip);
+}
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