308 lines
8.4 KiB
C
308 lines
8.4 KiB
C
/* $XConsortium: include.c,v 1.17 94/12/05 19:33:08 gildea Exp $ */
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/*
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Copyright (c) 1993, 1994 X Consortium
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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X CONSORTIUM BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
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AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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Except as contained in this notice, the name of the X Consortium shall not be
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used in advertising or otherwise to promote the sale, use or other dealings
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in this Software without prior written authorization from the X Consortium.
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*/
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#include "def.h"
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extern struct inclist inclist[ MAXFILES ],
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*inclistp;
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extern char *includedirs[ ];
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extern char *notdotdot[ ];
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extern boolean show_where_not;
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extern boolean warn_multiple;
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struct inclist *inc_path(file, include, dot)
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register char *file,
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*include;
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boolean dot;
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{
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static char path[ BUFSIZ ];
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register char **pp, *p;
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register struct inclist *ip;
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struct stat st;
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boolean found = FALSE;
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/*
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* Check all previously found include files for a path that
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* has already been expanded.
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*/
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for (ip = inclist; ip->i_file; ip++)
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if ((strcmp(ip->i_incstring, include) == 0) && !ip->i_included_sym)
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{
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found = TRUE;
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break;
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}
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/*
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* If the path was surrounded by "" or is an absolute path,
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* then check the exact path provided.
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*/
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if (!found && (dot || *include == '/')) {
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if (stat(include, &st) == 0) {
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ip = newinclude(include, include);
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found = TRUE;
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}
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else if (show_where_not)
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warning1("\tnot in %s\n", include);
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}
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/*
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* See if this include file is in the directory of the
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* file being compiled.
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*/
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if (!found) {
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for (p=file+strlen(file); p>file; p--)
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if (*p == '/')
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break;
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if (p == file)
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strcpy(path, include);
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else {
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strncpy(path, file, (p-file) + 1);
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path[ (p-file) + 1 ] = '\0';
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strcpy(path + (p-file) + 1, include);
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}
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remove_dotdot(path);
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if (stat(path, &st) == 0) {
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ip = newinclude(path, include);
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found = TRUE;
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}
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else if (show_where_not)
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warning1("\tnot in %s\n", path);
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}
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/*
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* Check the include directories specified. (standard include dir
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* should be at the end.)
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*/
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if (!found)
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for (pp = includedirs; *pp; pp++) {
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sprintf(path, "%s/%s", *pp, include);
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remove_dotdot(path);
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if (stat(path, &st) == 0) {
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ip = newinclude(path, include);
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found = TRUE;
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break;
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}
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else if (show_where_not)
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warning1("\tnot in %s\n", path);
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}
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if (!found)
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ip = NULL;
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return(ip);
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}
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/*
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* Occasionally, pathnames are created that look like .../x/../y
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* Any of the 'x/..' sequences within the name can be eliminated.
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* (but only if 'x' is not a symbolic link!!)
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*/
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remove_dotdot(path)
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char *path;
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{
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register char *end, *from, *to, **cp;
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char *components[ MAXFILES ],
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newpath[ BUFSIZ ];
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boolean component_copied;
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/*
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* slice path up into components.
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*/
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to = newpath;
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if (*path == '/')
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*to++ = '/';
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*to = '\0';
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cp = components;
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for (from=end=path; *end; end++)
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if (*end == '/') {
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while (*end == '/')
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*end++ = '\0';
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if (*from)
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*cp++ = from;
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from = end;
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}
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*cp++ = from;
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*cp = NULL;
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/*
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* Recursively remove all 'x/..' component pairs.
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*/
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cp = components;
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while(*cp) {
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if (!isdot(*cp) && !isdotdot(*cp) && isdotdot(*(cp+1))
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&& !issymbolic(newpath, *cp))
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{
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char **fp = cp + 2;
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char **tp = cp;
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do
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*tp++ = *fp; /* move all the pointers down */
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while (*fp++);
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if (cp != components)
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cp--; /* go back and check for nested ".." */
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} else {
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cp++;
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}
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}
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/*
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* Concatenate the remaining path elements.
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*/
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cp = components;
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component_copied = FALSE;
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while(*cp) {
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if (component_copied)
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*to++ = '/';
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component_copied = TRUE;
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for (from = *cp; *from; )
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*to++ = *from++;
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*to = '\0';
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cp++;
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}
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*to++ = '\0';
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/*
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* copy the reconstituted path back to our pointer.
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*/
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strcpy(path, newpath);
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}
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isdot(p)
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register char *p;
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{
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if(p && *p++ == '.' && *p++ == '\0')
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return(TRUE);
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return(FALSE);
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}
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isdotdot(p)
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register char *p;
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{
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if(p && *p++ == '.' && *p++ == '.' && *p++ == '\0')
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return(TRUE);
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return(FALSE);
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}
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issymbolic(dir, component)
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register char *dir, *component;
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{
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#ifdef S_IFLNK
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struct stat st;
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char buf[ BUFSIZ ], **pp;
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sprintf(buf, "%s%s%s", dir, *dir ? "/" : "", component);
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for (pp=notdotdot; *pp; pp++)
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if (strcmp(*pp, buf) == 0)
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return (TRUE);
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if (lstat(buf, &st) == 0
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&& (st.st_mode & S_IFMT) == S_IFLNK) {
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*pp++ = copy(buf);
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if (pp >= ¬dotdot[ MAXDIRS ])
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fatalerr("out of .. dirs, increase MAXDIRS\n");
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return(TRUE);
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}
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#endif
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return(FALSE);
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}
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/*
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* Add an include file to the list of those included by 'file'.
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*/
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struct inclist *newinclude(newfile, incstring)
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register char *newfile, *incstring;
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{
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register struct inclist *ip;
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/*
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* First, put this file on the global list of include files.
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*/
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ip = inclistp++;
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if (inclistp == inclist + MAXFILES - 1)
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fatalerr("out of space: increase MAXFILES\n");
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ip->i_file = copy(newfile);
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ip->i_included_sym = FALSE;
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if (incstring == NULL)
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ip->i_incstring = ip->i_file;
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else
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ip->i_incstring = copy(incstring);
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return(ip);
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}
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included_by(ip, newfile)
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register struct inclist *ip, *newfile;
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{
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register i;
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if (ip == NULL)
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return;
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/*
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* Put this include file (newfile) on the list of files included
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* by 'file'. If 'file' is NULL, then it is not an include
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* file itself (i.e. was probably mentioned on the command line).
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* If it is already on the list, don't stick it on again.
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*/
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if (ip->i_list == NULL)
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ip->i_list = (struct inclist **)
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malloc(sizeof(struct inclist *) * ++ip->i_listlen);
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else {
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for (i=0; i<ip->i_listlen; i++)
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if (ip->i_list[ i ] == newfile) {
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i = strlen(newfile->i_file);
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if (!ip->i_included_sym &&
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!(i > 2 &&
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newfile->i_file[i-1] == 'c' &&
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newfile->i_file[i-2] == '.'))
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{
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/* only complain if ip has */
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/* no #include SYMBOL lines */
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/* and is not a .c file */
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if (warn_multiple)
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{
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warning("%s includes %s more than once!\n",
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ip->i_file, newfile->i_file);
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warning1("Already have\n");
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for (i=0; i<ip->i_listlen; i++)
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warning1("\t%s\n", ip->i_list[i]->i_file);
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}
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}
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return;
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}
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ip->i_list = (struct inclist **) realloc(ip->i_list,
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sizeof(struct inclist *) * ++ip->i_listlen);
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}
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ip->i_list[ ip->i_listlen-1 ] = newfile;
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}
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inc_clean ()
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{
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register struct inclist *ip;
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for (ip = inclist; ip < inclistp; ip++) {
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ip->i_marked = FALSE;
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}
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}
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