/* dir.c -- How to build a special "dir" node from "localdir" files. */ /* This file is part of GNU Info, a program for reading online documentation stored in Info format. Copyright (C) 1993 Free Software Foundation, Inc. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. Written by Brian Fox (bfox@ai.mit.edu). */ #include #include #include #include #include #include "info-utils.h" #include "filesys.h" #include "tilde.h" /* The "dir" node can be built from the contents of a file called "dir", with the addition of the menus of every file called "localdir" found in INFOPATH. */ static void add_menu_to_file_buffer (), insert_text_into_fb_at_binding (); void maybe_build_dir_node (dirname, from_files_named) char *dirname; char *from_files_named; { FILE_BUFFER *dir_buffer; /* See if the file has already been loaded and exists. */ dir_buffer = info_find_file (dirname); /* If there is no "dir" in the current info path, we cannot build one from nothing. */ if (!dir_buffer) return; /* If this directory has already been built, return now. */ if (dir_buffer->flags & N_CannotGC) return; dir_buffer->flags |= N_CannotGC; /* For every file named FROM_FILES_NAMED in the search path, add the contents of that file's menu to our "dir" node. */ { struct stat finfo; char *this_dir; int namelen, path_index; int update_tags = 0; namelen = strlen (from_files_named); path_index = 0; /* Using each element of the path, check for "localdir". Do not check for "localdir.info.Z" or anything else. Only files explictly named "localdir" are eligible. This is a design decision. There can be an info file name "localdir.info" which contains information on the setting up of "localdir" files. */ while (this_dir = extract_colon_unit (infopath, &path_index)) { char *fullpath; int statable; /* Expand a leading tilde if one is present. */ if (*this_dir == '~') { char *tilde_expanded_dirname; tilde_expanded_dirname = tilde_expand_word (this_dir); free (this_dir); this_dir = tilde_expanded_dirname; } fullpath = (char *)xmalloc (3 + strlen (this_dir) + namelen); strcpy (fullpath, this_dir); if (fullpath[strlen (fullpath) - 1] != '/') strcat (fullpath, "/"); strcat (fullpath, from_files_named); statable = (stat (fullpath, &finfo) == 0); if (statable && S_ISREG (finfo.st_mode)) { long filesize; char *contents; contents = filesys_read_info_file (fullpath, &filesize, &finfo); if (contents) { update_tags++; add_menu_to_file_buffer (contents, filesize, dir_buffer); free (contents); } } free (fullpath); free (this_dir); } if (update_tags) build_tags_and_nodes (dir_buffer); } } /* Given CONTENTS and FB (a file buffer), add the menu found in CONTENTS to the menu found in FB->contents. Second argument SIZE is the total size of CONTENTS. */ static void add_menu_to_file_buffer (contents, size, fb) char *contents; long size; FILE_BUFFER *fb; { SEARCH_BINDING contents_binding, fb_binding; long contents_offset, fb_offset; contents_binding.buffer = contents; contents_binding.start = 0; contents_binding.end = size; contents_binding.flags = S_FoldCase | S_SkipDest; fb_binding.buffer = fb->contents; fb_binding.start = 0; fb_binding.end = fb->filesize; fb_binding.flags = S_FoldCase | S_SkipDest; /* Move to the start of the menus in CONTENTS and FB. */ contents_offset = search_forward (INFO_MENU_LABEL, &contents_binding); fb_offset = search_forward (INFO_MENU_LABEL, &fb_binding); /* If there is no menu in CONTENTS, quit now. */ if (contents_offset == -1) return; /* If there is no menu in FB, make one. */ if (fb_offset == -1) { /* Find the start of the second node in this file buffer. If there is only one node, we will be adding the contents to the end of this node. */ fb_offset = find_node_separator (&fb_binding); /* If not even a single node separator, give up. */ if (fb_offset == -1) return; fb_binding.start = fb_offset; fb_binding.start += skip_node_separator (fb_binding.buffer + fb_binding.start); /* Try to find the next node separator. */ fb_offset = find_node_separator (&fb_binding); /* If found one, consider that the start of the menu. Otherwise, the start of this menu is the end of the file buffer (i.e., fb->size). */ if (fb_offset != -1) fb_binding.start = fb_offset; else fb_binding.start = fb_binding.end; insert_text_into_fb_at_binding (fb, &fb_binding, INFO_MENU_LABEL, strlen (INFO_MENU_LABEL)); fb_binding.buffer = fb->contents; fb_binding.start = 0; fb_binding.end = fb->filesize; fb_offset = search_forward (INFO_MENU_LABEL, &fb_binding); if (fb_offset == -1) abort (); } /* CONTENTS_OFFSET and FB_OFFSET point to the starts of the menus that appear in their respective buffers. Add the remainder of CONTENTS to the end of FB's menu. */ fb_binding.start = fb_offset; fb_offset = find_node_separator (&fb_binding); if (fb_offset != -1) fb_binding.start = fb_offset; else fb_binding.start = fb_binding.end; insert_text_into_fb_at_binding (fb, &fb_binding, contents + contents_offset, size - contents_offset); } static void insert_text_into_fb_at_binding (fb, binding, text, textlen) FILE_BUFFER *fb; SEARCH_BINDING *binding; char *text; int textlen; { char *contents; long start, end; start = binding->start; end = fb->filesize; contents = (char *)xmalloc (fb->filesize + textlen + 1); memcpy (contents, fb->contents, start); memcpy (contents + start, text, textlen); memcpy (contents + start + textlen, fb->contents + start, end - start); free (fb->contents); fb->contents = contents; fb->filesize += textlen; fb->finfo.st_size = fb->filesize; }