1 /* Part of CPP library. (include file handling)
2 Copyright (C) 1986, 1987, 1989, 1992, 1993, 1994, 1995, 1998,
3 1999, 2000 Free Software Foundation, Inc.
4 Written by Per Bothner, 1994.
5 Based on CCCP program by Paul Rubin, June 1986
6 Adapted to ANSI C, Richard Stallman, Jan 1987
7 Split out of cpplib.c, Zack Weinberg, Oct 1998
9 This program is free software; you can redistribute it and/or modify it
10 under the terms of the GNU General Public License as published by the
11 Free Software Foundation; either version 2, or (at your option) any
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program; if not, write to the Free Software
21 Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
29 #include "splay-tree.h"
32 # include <sys/mman.h>
33 # ifndef MMAP_THRESHOLD
34 # define MMAP_THRESHOLD 3 /* Minimum page count to mmap the file. */
37 #else /* No MMAP_FILE */
38 # undef MMAP_THRESHOLD
39 # define MMAP_THRESHOLD 0
46 #ifndef INCLUDE_LEN_FUDGE
47 # define INCLUDE_LEN_FUDGE 0
50 /* If errno is inspected immediately after a system call fails, it will be
51 nonzero, and no error number will ever be zero. */
62 /* Suppress warning about function macros used w/o arguments in traditional
63 C. It is unlikely that glibc's strcmp macro helps this file at all. */
66 static struct file_name_map *read_name_map
67 PARAMS ((cpp_reader *, const char *));
68 static char *read_filename_string PARAMS ((int, FILE *));
69 static char *remap_filename PARAMS ((cpp_reader *, char *,
70 struct file_name_list *));
71 static struct file_name_list *actual_directory
72 PARAMS ((cpp_reader *, const char *));
73 static struct include_file *find_include_file
74 PARAMS ((cpp_reader *, const char *,
75 struct file_name_list *));
76 static struct include_file *lookup_include_file
77 PARAMS ((cpp_reader *, const char *));
78 static int read_include_file PARAMS ((cpp_reader *, struct include_file *));
79 static int stack_include_file PARAMS ((cpp_reader *, struct include_file *));
80 static void purge_cache PARAMS ((struct include_file *));
81 static void destroy_include_file_node PARAMS ((splay_tree_value));
82 static int report_missing_guard PARAMS ((splay_tree_node, void *));
85 static void hack_vms_include_specification PARAMS ((char *));
88 /* We use a splay tree to store information about all the include
89 files seen in this compilation. The key of each tree node is the
90 physical path to the file. The value is 0 if the file does not
91 exist, or a struct include_file pointer. */
94 destroy_include_file_node (v)
97 struct include_file *f = (struct include_file *)v;
106 _cpp_init_includes (pfile)
109 pfile->all_include_files
110 = splay_tree_new ((splay_tree_compare_fn) strcmp,
111 (splay_tree_delete_key_fn) free,
112 destroy_include_file_node);
116 _cpp_cleanup_includes (pfile)
119 splay_tree_delete (pfile->all_include_files);
122 /* Given a file name, look it up in the cache; if there is no entry,
123 create one. Returns 0 if the file doesn't exist or is
124 inaccessible, otherwise the cache entry. */
126 static struct include_file *
127 lookup_include_file (pfile, filename)
129 const char *filename;
132 struct include_file *file = 0;
136 nd = splay_tree_lookup (pfile->all_include_files, (splay_tree_key) filename);
139 return (struct include_file *)nd->value;
141 /* We used to open files in nonblocking mode, but that caused more
142 problems than it solved. Do take care not to acquire a
143 controlling terminal by mistake (this can't happen on sane
144 systems, but paranoia is a virtue).
146 Use the three-argument form of open even though we aren't
147 specifying O_CREAT, to defend against broken system headers.
149 O_BINARY tells some runtime libraries (notably DJGPP) not to do
150 newline translation; we can handle DOS line breaks just fine
153 Special case: the empty string is translated to stdin. */
155 if (filename[0] == '\0')
158 fd = open (filename, O_RDONLY|O_NOCTTY|O_BINARY, 0666);
162 if (fstat (fd, &st) < 0)
165 file = xcnew (struct include_file);
166 file->name = xstrdup (filename);
170 /* If the file is plain and zero length, mark it never-reread now. */
171 if (S_ISREG (st.st_mode) && st.st_size == 0)
172 file->cmacro = NEVER_REREAD;
174 splay_tree_insert (pfile->all_include_files,
175 (splay_tree_key) file->name, (splay_tree_value) file);
180 /* Don't issue an error message if the file doesn't exist. */
181 if (errno != ENOENT && errno != ENOTDIR)
182 cpp_error_from_errno (pfile, filename);
184 /* Create a negative node for this path. */
185 splay_tree_insert (pfile->all_include_files,
186 (splay_tree_key) xstrdup (filename), 0);
190 /* Place the file referenced by INC into a new buffer on PFILE's stack.
191 Return 1 if successful, 0 if not. */
194 stack_include_file (pfile, inc)
196 struct include_file *inc;
200 if (DO_NOT_REREAD (inc))
203 if (inc->buffer == NULL)
204 if (read_include_file (pfile, inc) == 0)
207 fp = cpp_push_buffer (pfile, NULL, 0);
212 fp->nominal_fname = inc->name;
213 fp->buf = inc->buffer;
214 fp->rlimit = fp->buf + inc->st.st_size;
217 fp->line_base = fp->buf;
219 /* The ->actual_dir field is only used when ignore_srcdir is not in effect;
221 if (!CPP_OPTION (pfile, ignore_srcdir))
222 fp->actual_dir = actual_directory (pfile, inc->name);
225 pfile->include_depth++;
226 pfile->input_stack_listing_current = 0;
227 if (pfile->cb.enter_file)
228 (*pfile->cb.enter_file) (pfile);
232 /* Read the file referenced by INC into the file cache.
234 If fd points to a plain file, we might be able to mmap it; we can
235 definitely allocate the buffer all at once. If fd is a pipe or
236 terminal, we can't do either. If fd is something weird, like a
237 block device or a directory, we don't want to read it at all.
239 Unfortunately, different systems use different st.st_mode values
240 for pipes: some have S_ISFIFO, some S_ISSOCK, some are buggy and
241 zero the entire struct stat except a couple fields. Hence we don't
242 even try to figure out what something is, except for plain files,
243 directories, and block devices.
245 FIXME: Flush file cache and try again if we run out of memory. */
248 read_include_file (pfile, inc)
250 struct include_file *inc;
252 ssize_t size, offset, count;
255 static int pagesize = -1;
258 if (S_ISREG (inc->st.st_mode))
260 /* off_t might have a wider range than ssize_t - in other words,
261 the max size of a file might be bigger than the address
262 space. We can't handle a file that large. (Anyone with
263 a single source file bigger than 2GB needs to rethink
264 their coding style.) Some systems (e.g. AIX 4.1) define
265 SSIZE_MAX to be much smaller than the actual range of the
266 type. Use INTTYPE_MAXIMUM unconditionally to ensure this
268 if (inc->st.st_size > INTTYPE_MAXIMUM (ssize_t))
270 cpp_error (pfile, "%s is too large", inc->name);
273 size = inc->st.st_size;
277 pagesize = getpagesize ();
279 if (size / pagesize >= MMAP_THRESHOLD)
281 buf = (U_CHAR *) mmap (0, size, PROT_READ, MAP_PRIVATE, inc->fd, 0);
282 if (buf == (U_CHAR *)-1)
289 buf = (U_CHAR *) xmalloc (size);
291 while (offset < size)
293 count = read (inc->fd, buf + offset, size - offset);
298 cpp_warning (pfile, "%s is shorter than expected", inc->name);
306 else if (S_ISBLK (inc->st.st_mode))
308 cpp_error (pfile, "%s is a block device", inc->name);
311 else if (S_ISDIR (inc->st.st_mode))
313 cpp_error (pfile, "%s is a directory", inc->name);
318 /* 8 kilobytes is a sensible starting size. It ought to be
319 bigger than the kernel pipe buffer, and it's definitely
320 bigger than the majority of C source files. */
323 buf = (U_CHAR *) xmalloc (size);
325 while ((count = read (inc->fd, buf + offset, size - offset)) > 0)
329 buf = xrealloc (buf, (size *= 2));
341 buf = xrealloc (buf, offset);
342 inc->st.st_size = offset;
351 cpp_error_from_errno (pfile, inc->name);
353 /* Do not try to read this file again. */
356 inc->cmacro = NEVER_REREAD;
362 struct include_file *inc;
367 munmap ((caddr_t) inc->buffer, inc->st.st_size);
369 free ((PTR) inc->buffer);
374 /* Return 1 if the file named by FNAME has been included before in
375 any context, 0 otherwise. */
377 cpp_included (pfile, fname)
381 struct file_name_list *path;
387 /* Just look it up. */
388 nd = splay_tree_lookup (pfile->all_include_files, (splay_tree_key) fname);
389 return (nd && nd->value);
392 /* Search directory path for the file. */
393 name = (char *) alloca (strlen (fname) + pfile->max_include_len
394 + 2 + INCLUDE_LEN_FUDGE);
395 for (path = CPP_OPTION (pfile, quote_include); path; path = path->next)
397 memcpy (name, path->name, path->nlen);
398 name[path->nlen] = '/';
399 strcpy (&name[path->nlen+1], fname);
400 _cpp_simplify_pathname (name);
401 if (CPP_OPTION (pfile, remap))
402 name = remap_filename (pfile, name, path);
404 nd = splay_tree_lookup (pfile->all_include_files, (splay_tree_key) name);
411 /* Search for include file FNAME in the include chain starting at
412 SEARCH_START. Return 0 if there is no such file (or it's un-openable),
413 otherwise an include_file structure. */
415 static struct include_file *
416 find_include_file (pfile, fname, search_start)
419 struct file_name_list *search_start;
421 struct file_name_list *path;
423 struct include_file *file;
426 return lookup_include_file (pfile, fname);
428 /* Search directory path for the file. */
429 name = (char *) alloca (strlen (fname) + pfile->max_include_len
430 + 2 + INCLUDE_LEN_FUDGE);
431 for (path = search_start; path; path = path->next)
433 memcpy (name, path->name, path->nlen);
434 name[path->nlen] = '/';
435 strcpy (&name[path->nlen+1], fname);
436 _cpp_simplify_pathname (name);
437 if (CPP_OPTION (pfile, remap))
438 name = remap_filename (pfile, name, path);
440 file = lookup_include_file (pfile, name);
443 file->sysp = path->sysp;
444 file->foundhere = path;
451 /* #line uses this to save artificial file names. We have to stat the
452 file because an all_include_files entry is always either + or -,
453 there's no 'I don't know' value. */
455 _cpp_fake_include (pfile, fname)
460 struct include_file *file;
463 file = find_include_file (pfile, fname, CPP_OPTION (pfile, quote_include));
474 name = xstrdup (fname);
475 _cpp_simplify_pathname (name);
477 /* We cannot just blindly insert a node, because there's still the
478 chance that the node already exists but isn't on the search path. */
479 nd = splay_tree_lookup (pfile->all_include_files, (splay_tree_key) name);
483 return (const char *) nd->key;
486 splay_tree_insert (pfile->all_include_files, (splay_tree_key) name, 0);
487 return (const char *)name;
490 /* Not everyone who wants to set system-header-ness on a buffer can
491 see the details of struct include_file. This is an exported interface
492 because fix-header needs it. */
494 cpp_make_system_header (pfile, pbuf, flag)
499 if (flag < 0 || flag > 2)
500 cpp_ice (pfile, "cpp_make_system_header: bad flag %d\n", flag);
502 cpp_ice (pfile, "cpp_make_system_header called on non-file buffer");
504 pbuf->inc->sysp = flag;
508 cpp_syshdr_flags (pfile, pbuf)
509 cpp_reader *pfile ATTRIBUTE_UNUSED;
512 #ifndef NO_IMPLICIT_EXTERN_C
513 if (CPP_OPTION (pfile, cplusplus) && pbuf->inc->sysp == 2)
521 /* Report on all files that might benefit from a multiple include guard.
524 _cpp_report_missing_guards (pfile)
528 splay_tree_foreach (pfile->all_include_files, report_missing_guard,
533 report_missing_guard (n, b)
537 struct include_file *f = (struct include_file *) n->value;
538 int *bannerp = (int *)b;
540 if (f && f->cmacro == 0 && f->include_count == 1)
544 fputs (_("Multiple include guards may be useful for:\n"), stderr);
547 fputs (f->name, stderr);
553 #define PRINT_THIS_DEP(p, b) (CPP_PRINT_DEPS(p) > (b||p->system_include_depth))
555 _cpp_execute_include (pfile, f, len, no_reinclude, search_start, angle_brackets)
560 struct file_name_list *search_start;
563 struct include_file *inc;
569 search_start = CPP_OPTION (pfile, bracket_include);
570 else if (CPP_OPTION (pfile, ignore_srcdir))
571 search_start = CPP_OPTION (pfile, quote_include);
573 search_start = CPP_BUFFER (pfile)->actual_dir;
578 cpp_error (pfile, "No include path in which to find %s", f);
582 fname = alloca (len + 1);
583 memcpy (fname, f, len);
586 inc = find_include_file (pfile, fname, search_start);
590 /* For -M, add the file to the dependencies on its first inclusion. */
591 if (!inc->include_count && PRINT_THIS_DEP (pfile, angle_brackets))
592 deps_add_dep (pfile->deps, inc->name);
593 inc->include_count++;
595 /* Actually process the file. */
596 if (stack_include_file (pfile, inc))
599 pfile->system_include_depth++;
602 inc->cmacro = NEVER_REREAD;
604 /* Handle -H option. */
605 if (CPP_OPTION (pfile, print_include_names))
607 cpp_buffer *fp = CPP_BUFFER (pfile);
608 while ((fp = CPP_PREV_BUFFER (fp)) != NULL)
610 fprintf (stderr, " %s\n", inc->name);
616 if (CPP_OPTION (pfile, print_deps_missing_files)
617 && PRINT_THIS_DEP (pfile, angle_brackets))
620 deps_add_dep (pfile->deps, fname);
624 struct file_name_list *ptr;
625 /* If requested as a system header, assume it belongs in
626 the first system header directory. */
627 if (CPP_OPTION (pfile, bracket_include))
628 ptr = CPP_OPTION (pfile, bracket_include);
630 ptr = CPP_OPTION (pfile, quote_include);
632 p = (char *) alloca (strlen (ptr->name)
633 + strlen (fname) + 2);
634 if (*ptr->name != '\0')
636 strcpy (p, ptr->name);
640 _cpp_simplify_pathname (p);
641 deps_add_dep (pfile->deps, p);
644 /* If -M was specified, and this header file won't be added to
645 the dependency list, then don't count this as an error,
646 because we can still produce correct output. Otherwise, we
647 can't produce correct output, because there may be
648 dependencies we need inside the missing file, and we don't
649 know what directory this missing file exists in. */
650 else if (CPP_PRINT_DEPS (pfile)
651 && ! PRINT_THIS_DEP (pfile, angle_brackets))
652 cpp_warning (pfile, "No include path in which to find %s", fname);
654 cpp_error_from_errno (pfile, fname);
657 /* Locate file F, and determine whether it is newer than PFILE. Return -1,
658 if F cannot be located or dated, 1, if it is newer and 0 if older. */
661 _cpp_compare_file_date (pfile, f, len, angle_brackets)
668 struct file_name_list *search_start;
669 struct include_file *inc;
670 struct include_file *current_include = CPP_BUFFER (pfile)->inc;
673 search_start = CPP_OPTION (pfile, bracket_include);
674 else if (CPP_OPTION (pfile, ignore_srcdir))
675 search_start = CPP_OPTION (pfile, quote_include);
677 search_start = CPP_BUFFER (pfile)->actual_dir;
679 fname = alloca (len + 1);
680 memcpy (fname, f, len);
682 inc = find_include_file (pfile, fname, search_start);
692 return inc->st.st_mtime > current_include->st.st_mtime;
696 /* Push an input buffer and load it up with the contents of FNAME.
697 If FNAME is "" or NULL, read standard input. */
699 cpp_read_file (pfile, fname)
703 struct include_file *f;
708 f = lookup_include_file (pfile, fname);
712 cpp_error_from_errno (pfile, fname);
716 return stack_include_file (pfile, f);
719 /* Do appropriate cleanup when a file buffer is popped off the input
722 _cpp_pop_file_buffer (pfile, buf)
726 struct include_file *inc = buf->inc;
728 if (pfile->system_include_depth)
729 pfile->system_include_depth--;
730 if (pfile->include_depth)
731 pfile->include_depth--;
732 if (pfile->potential_control_macro)
734 if (inc->cmacro != NEVER_REREAD)
735 inc->cmacro = pfile->potential_control_macro;
736 pfile->potential_control_macro = 0;
738 pfile->input_stack_listing_current = 0;
741 if (inc->refcnt == 0 && DO_NOT_REREAD (inc))
745 /* The file_name_map structure holds a mapping of file names for a
746 particular directory. This mapping is read from the file named
747 FILE_NAME_MAP_FILE in that directory. Such a file can be used to
748 map filenames on a file system with severe filename restrictions,
749 such as DOS. The format of the file name map file is just a series
750 of lines with two tokens on each line. The first token is the name
751 to map, and the second token is the actual name to use. */
755 struct file_name_map *map_next;
760 #define FILE_NAME_MAP_FILE "header.gcc"
762 /* Read a space delimited string of unlimited length from a stdio
766 read_filename_string (ch, f)
774 set = alloc = xmalloc (len + 1);
778 while ((ch = getc (f)) != EOF && ! is_space(ch))
780 if (set - alloc == len)
783 alloc = xrealloc (alloc, len + 1);
784 set = alloc + len / 2;
794 /* This structure holds a linked list of file name maps, one per directory. */
796 struct file_name_map_list
798 struct file_name_map_list *map_list_next;
800 struct file_name_map *map_list_map;
803 /* Read the file name map file for DIRNAME. */
805 static struct file_name_map *
806 read_name_map (pfile, dirname)
810 register struct file_name_map_list *map_list_ptr;
814 for (map_list_ptr = CPP_OPTION (pfile, map_list); map_list_ptr;
815 map_list_ptr = map_list_ptr->map_list_next)
816 if (! strcmp (map_list_ptr->map_list_name, dirname))
817 return map_list_ptr->map_list_map;
819 map_list_ptr = ((struct file_name_map_list *)
820 xmalloc (sizeof (struct file_name_map_list)));
821 map_list_ptr->map_list_name = xstrdup (dirname);
822 map_list_ptr->map_list_map = NULL;
824 name = (char *) alloca (strlen (dirname) + strlen (FILE_NAME_MAP_FILE) + 2);
825 strcpy (name, dirname);
828 strcat (name, FILE_NAME_MAP_FILE);
829 f = fopen (name, "r");
831 map_list_ptr->map_list_map = (struct file_name_map *)-1;
835 int dirlen = strlen (dirname);
837 while ((ch = getc (f)) != EOF)
840 struct file_name_map *ptr;
844 from = read_filename_string (ch, f);
845 while ((ch = getc (f)) != EOF && is_hspace(ch))
847 to = read_filename_string (ch, f);
849 ptr = ((struct file_name_map *)
850 xmalloc (sizeof (struct file_name_map)));
851 ptr->map_from = from;
853 /* Make the real filename absolute. */
858 ptr->map_to = xmalloc (dirlen + strlen (to) + 2);
859 strcpy (ptr->map_to, dirname);
860 ptr->map_to[dirlen] = '/';
861 strcpy (ptr->map_to + dirlen + 1, to);
865 ptr->map_next = map_list_ptr->map_list_map;
866 map_list_ptr->map_list_map = ptr;
868 while ((ch = getc (f)) != '\n')
875 map_list_ptr->map_list_next = CPP_OPTION (pfile, map_list);
876 CPP_OPTION (pfile, map_list) = map_list_ptr;
878 return map_list_ptr->map_list_map;
881 /* Remap NAME based on the file_name_map (if any) for LOC. */
884 remap_filename (pfile, name, loc)
887 struct file_name_list *loc;
889 struct file_name_map *map;
890 const char *from, *p, *dir;
893 loc->name_map = read_name_map (pfile,
897 if (loc->name_map == (struct file_name_map *)-1)
900 from = name + strlen (loc->name) + 1;
902 for (map = loc->name_map; map; map = map->map_next)
903 if (!strcmp (map->map_from, from))
906 /* Try to find a mapping file for the particular directory we are
907 looking in. Thus #include <sys/types.h> will look up sys/types.h
908 in /usr/include/header.gcc and look up types.h in
909 /usr/include/sys/header.gcc. */
910 p = strrchr (name, '/');
914 && strlen (loc->name) == (size_t) (p - name)
915 && !strncmp (loc->name, name, p - name))
916 /* FILENAME is in SEARCHPTR, which we've already checked. */
926 char * newdir = (char *) alloca (p - name + 1);
927 memcpy (newdir, name, p - name);
928 newdir[p - name] = '\0';
933 for (map = read_name_map (pfile, dir); map; map = map->map_next)
934 if (! strcmp (map->map_from, name))
940 /* Given a path FNAME, extract the directory component and place it
941 onto the actual_dirs list. Return a pointer to the allocated
942 file_name_list structure. These structures are used to implement
943 current-directory "" include searching. */
945 static struct file_name_list *
946 actual_directory (pfile, fname)
950 char *last_slash, *dir;
952 struct file_name_list *x;
954 dir = xstrdup (fname);
955 last_slash = strrchr (dir, '/');
958 if (last_slash == dir)
961 last_slash[1] = '\0';
965 dlen = last_slash - dir;
976 if (dlen > pfile->max_include_len)
977 pfile->max_include_len = dlen;
979 for (x = pfile->actual_dirs; x; x = x->alloc)
980 if (!strcmp (x->name, dir))
986 /* Not found, make a new one. */
987 x = (struct file_name_list *) xmalloc (sizeof (struct file_name_list));
990 x->next = CPP_OPTION (pfile, quote_include);
991 x->alloc = pfile->actual_dirs;
992 x->sysp = CPP_BUFFER (pfile)->inc->sysp;
995 pfile->actual_dirs = x;
999 /* Simplify a path name in place, deleting redundant components. This
1000 reduces OS overhead and guarantees that equivalent paths compare
1001 the same (modulo symlinks).
1004 foo/bar/../quux foo/quux
1008 //quux //quux (POSIX allows leading // as a namespace escape)
1010 Guarantees no trailing slashes. All transforms reduce the length
1014 _cpp_simplify_pathname (path)
1021 #if defined (HAVE_DOS_BASED_FILE_SYSTEM)
1022 /* Convert all backslashes to slashes. */
1023 for (from = path; *from; from++)
1024 if (*from == '\\') *from = '/';
1026 /* Skip over leading drive letter if present. */
1027 if (ISALPHA (path[0]) && path[1] == ':')
1028 from = to = &path[2];
1035 /* Remove redundant initial /s. */
1044 /* 3 or more initial /s are equivalent to 1 /. */
1045 while (*++from == '/');
1047 /* On some hosts // differs from /; Posix allows this. */
1055 while (*from == '/')
1058 if (from[0] == '.' && from[1] == '/')
1060 else if (from[0] == '.' && from[1] == '\0')
1062 else if (from[0] == '.' && from[1] == '.' && from[2] == '/')
1079 while (to > base && *to != '/') to--;
1085 else if (from[0] == '.' && from[1] == '.' && from[2] == '\0')
1098 while (to > base && *to != '/') to--;
1105 /* Copy this component and trailing /, if any. */
1106 while ((*to++ = *from++) != '/')
1118 /* Trim trailing slash */
1119 if (to[0] == '/' && (!absolute || to > path+1))
1122 /* Change the empty string to "." so that stat() on the result
1123 will always work. */
1132 /* It is not clear when this should be used if at all, so I've
1133 disabled it until someone who understands VMS can look at it. */
1136 /* Under VMS we need to fix up the "include" specification filename.
1138 Rules for possible conversions
1140 fullname tried paths
1143 ./dir/name [.dir]name
1145 /name [000000]name, name
1146 dir/name dir:[000000]name, dir:name, dir/name
1147 dir1/dir2/name dir1:[dir2]name, dir1:[000000.dir2]name
1148 path:/name path:[000000]name, path:name
1149 path:/dir/name path:[000000.dir]name, path:[dir]name
1150 path:dir/name path:[dir]name
1151 [path]:[dir]name [path.dir]name
1152 path/[dir]name [path.dir]name
1154 The path:/name input is constructed when expanding <> includes. */
1158 hack_vms_include_specification (fullname)
1161 register char *basename, *unixname, *local_ptr, *first_slash;
1162 int f, check_filename_before_returning, must_revert;
1165 check_filename_before_returning = 0;
1167 /* See if we can find a 1st slash. If not, there's no path information. */
1168 first_slash = strchr (fullname, '/');
1169 if (first_slash == 0)
1170 return 0; /* Nothing to do!!! */
1172 /* construct device spec if none given. */
1174 if (strchr (fullname, ':') == 0)
1177 /* If fullname has a slash, take it as device spec. */
1179 if (first_slash == fullname)
1181 first_slash = strchr (fullname + 1, '/'); /* 2nd slash ? */
1183 *first_slash = ':'; /* make device spec */
1184 for (basename = fullname; *basename != 0; basename++)
1185 *basename = *(basename+1); /* remove leading slash */
1187 else if ((first_slash[-1] != '.') /* keep ':/', './' */
1188 && (first_slash[-1] != ':')
1189 && (first_slash[-1] != ']')) /* or a vms path */
1193 else if ((first_slash[1] == '[') /* skip './' in './[dir' */
1194 && (first_slash[-1] == '.'))
1198 /* Get part after first ':' (basename[-1] == ':')
1199 or last '/' (basename[-1] == '/'). */
1201 basename = base_name (fullname);
1203 local_ptr = Local; /* initialize */
1205 /* We are trying to do a number of things here. First of all, we are
1206 trying to hammer the filenames into a standard format, such that later
1207 processing can handle them.
1209 If the file name contains something like [dir.], then it recognizes this
1210 as a root, and strips the ".]". Later processing will add whatever is
1211 needed to get things working properly.
1213 If no device is specified, then the first directory name is taken to be
1214 a device name (or a rooted logical). */
1216 /* Point to the UNIX filename part (which needs to be fixed!)
1217 but skip vms path information.
1218 [basename != fullname since first_slash != 0]. */
1220 if ((basename[-1] == ':') /* vms path spec. */
1221 || (basename[-1] == ']')
1222 || (basename[-1] == '>'))
1223 unixname = basename;
1225 unixname = fullname;
1227 if (*unixname == '/')
1230 /* If the directory spec is not rooted, we can just copy
1231 the UNIX filename part and we are done. */
1233 if (((basename - fullname) > 1)
1234 && ( (basename[-1] == ']')
1235 || (basename[-1] == '>')))
1237 if (basename[-2] != '.')
1240 /* The VMS part ends in a `]', and the preceding character is not a `.'.
1241 -> PATH]:/name (basename = '/name', unixname = 'name')
1242 We strip the `]', and then splice the two parts of the name in the
1243 usual way. Given the default locations for include files,
1244 we will only use this code if the user specifies alternate locations
1245 with the /include (-I) switch on the command line. */
1247 basename -= 1; /* Strip "]" */
1248 unixname--; /* backspace */
1253 /* The VMS part has a ".]" at the end, and this will not do. Later
1254 processing will add a second directory spec, and this would be a syntax
1255 error. Thus we strip the ".]", and thus merge the directory specs.
1256 We also backspace unixname, so that it points to a '/'. This inhibits the
1257 generation of the 000000 root directory spec (which does not belong here
1260 basename -= 2; /* Strip ".]" */
1261 unixname--; /* backspace */
1269 /* We drop in here if there is no VMS style directory specification yet.
1270 If there is no device specification either, we make the first dir a
1271 device and try that. If we do not do this, then we will be essentially
1272 searching the users default directory (as if they did a #include "asdf.h").
1274 Then all we need to do is to push a '[' into the output string. Later
1275 processing will fill this in, and close the bracket. */
1277 if ((unixname != fullname) /* vms path spec found. */
1278 && (basename[-1] != ':'))
1279 *local_ptr++ = ':'; /* dev not in spec. take first dir */
1281 *local_ptr++ = '['; /* Open the directory specification */
1284 if (unixname == fullname) /* no vms dir spec. */
1287 if ((first_slash != 0) /* unix dir spec. */
1288 && (*unixname != '/') /* not beginning with '/' */
1289 && (*unixname != '.')) /* or './' or '../' */
1290 *local_ptr++ = '.'; /* dir is local ! */
1293 /* at this point we assume that we have the device spec, and (at least
1294 the opening "[" for a directory specification. We may have directories
1297 If there are no other slashes then the filename will be
1298 in the "root" directory. Otherwise, we need to add
1299 directory specifications. */
1301 if (strchr (unixname, '/') == 0)
1303 /* if no directories specified yet and none are following. */
1304 if (local_ptr[-1] == '[')
1306 /* Just add "000000]" as the directory string */
1307 strcpy (local_ptr, "000000]");
1308 local_ptr += strlen (local_ptr);
1309 check_filename_before_returning = 1; /* we might need to fool with this later */
1315 /* As long as there are still subdirectories to add, do them. */
1316 while (strchr (unixname, '/') != 0)
1318 /* If this token is "." we can ignore it
1319 if it's not at the beginning of a path. */
1320 if ((unixname[0] == '.') && (unixname[1] == '/'))
1322 /* remove it at beginning of path. */
1323 if ( ((unixname == fullname) /* no device spec */
1324 && (fullname+2 != basename)) /* starts with ./ */
1326 || ((basename[-1] == ':') /* device spec */
1327 && (unixname-1 == basename))) /* and ./ afterwards */
1328 *local_ptr++ = '.'; /* make '[.' start of path. */
1333 /* Add a subdirectory spec. Do not duplicate "." */
1334 if ( local_ptr[-1] != '.'
1335 && local_ptr[-1] != '['
1336 && local_ptr[-1] != '<')
1339 /* If this is ".." then the spec becomes "-" */
1340 if ( (unixname[0] == '.')
1341 && (unixname[1] == '.')
1342 && (unixname[2] == '/'))
1344 /* Add "-" and skip the ".." */
1345 if ((local_ptr[-1] == '.')
1346 && (local_ptr[-2] == '['))
1347 local_ptr--; /* prevent [.- */
1353 /* Copy the subdirectory */
1354 while (*unixname != '/')
1355 *local_ptr++= *unixname++;
1357 unixname++; /* Skip the "/" */
1360 /* Close the directory specification */
1361 if (local_ptr[-1] == '.') /* no trailing periods */
1364 if (local_ptr[-1] == '[') /* no dir needed */
1370 /* Now add the filename. */
1373 *local_ptr++ = *unixname++;
1376 /* Now append it to the original VMS spec. */
1378 strcpy ((must_revert==1)?fullname:basename, Local);
1380 /* If we put a [000000] in the filename, try to open it first. If this fails,
1381 remove the [000000], and return that name. This provides flexibility
1382 to the user in that they can use both rooted and non-rooted logical names
1383 to point to the location of the file. */
1385 if (check_filename_before_returning)
1387 f = open (fullname, O_RDONLY|O_NONBLOCK);
1390 /* The file name is OK as it is, so return it as is. */
1395 /* The filename did not work. Try to remove the [000000] from the name,
1398 basename = strchr (fullname, '[');
1399 local_ptr = strchr (fullname, ']') + 1;
1400 strcpy (basename, local_ptr); /* this gets rid of it */