source: trunk/texinfo/makeinfo/node.h@ 2772

Last change on this file since 2772 was 2617, checked in by bird, 20 years ago

GNU Texinfo 4.8
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1/* node.h -- declarations for Node.
2 $Id: node.h,v 1.2 2004/04/11 17:56:47 karl Exp $
3
4 Copyright (C) 1996, 1997, 1998, 1999, 2002 Free Software Foundation, Inc.
5
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2, or (at your option)
9 any later version.
10
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
15
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
19
20 Written by Brian Fox (bfox@ai.mit.edu). */
21
22#ifndef NODE_H
23#define NODE_H
24
25#include "xref.h"
26
27/* The various references that we know about. */
28/* What we remember for each node. */
29typedef struct tentry
30{
31 struct tentry *next_ent;
32 char *node; /* Name of this node. */
33 char *prev; /* Name of "Prev:" for this node. */
34 char *next; /* Name of "Next:" for this node. */
35 char *up; /* Name of "Up:" for this node. */
36 int position; /* Output file position of this node. */
37 int line_no; /* Defining line in source file. */
38 char *filename; /* The file that this node was found in. */
39 int touched; /* Nonzero means this node has been referenced. */
40 int flags;
41 int number; /* Number for this node, relevant for HTML
42 splitting -- from use+define order, not just
43 define. */
44 int order; /* The order of the tag, starting from zero. */
45 char *html_fname; /* The HTML file to which this node is written
46 (non-NULL only for HTML splitting). */
47} TAG_ENTRY;
48
49/* If node-a has a "Next" for node-b, but node-b has no "Prev" for node-a,
50 we turn on this flag bit in node-b's tag entry. This means that when
51 it is time to validate node-b, we don't report an additional error
52 if there was no "Prev" field. */
53#define TAG_FLAG_PREV_ERROR 1
54#define TAG_FLAG_NEXT_ERROR 2
55#define TAG_FLAG_UP_ERROR 4
56#define TAG_FLAG_NO_WARN 8
57#define TAG_FLAG_IS_TOP 16
58#define TAG_FLAG_ANCHOR 32
59
60
61/* Menu reference, *note reference, and validation hacking. */
62
63/* A structure to remember references with. A reference to a node is
64 either an entry in a menu, or a cross-reference made with [px]ref. */
65typedef struct node_ref
66{
67 struct node_ref *next;
68 char *node; /* Name of node referred to. */
69 char *containing_node; /* Name of node containing this reference. */
70 int line_no; /* Line number where the reference occurs. */
71 int section; /* Section level where the reference occurs. */
72 char *filename; /* Name of file where the reference occurs. */
73 enum reftype type; /* Type of reference, either menu or note. */
74 int number; /* Number for this node, relevant for
75 HTML splitting -- from use+define
76 order, not just define. */
77} NODE_REF;
78
79/* The linked list of such structures. */
80extern NODE_REF *node_references;
81
82/* A similar list for references occuring in @node next
83 and similar references, needed for HTML. */
84extern NODE_REF *node_node_references;
85
86/* List of all nodes. */
87extern TAG_ENTRY *tag_table;
88
89/* Counter for setting node_ref.number; zero is Top. */
90extern int node_number;
91
92/* Node order counter. */
93extern int node_order;
94
95/* The current node's section level. */
96extern int current_section;
97
98/* Nonzero when the next sectioning command should generate an anchor
99 corresponding to the current node in HTML mode. */
100extern int outstanding_node;
101
102
103extern TAG_ENTRY *find_node (char *name);
104
105/* A search string which is used to find a line defining a node. */
106DECLARE (char *, node_search_string, "\n@node ");
107
108/* Extract node name from a menu item. */
109extern char *glean_node_from_menu (int remember_ref, enum reftype ref_type);
110
111/* Remember a node for later validation. */
112extern void remember_node_reference (char *node, int line, enum reftype type);
113
114/* Remember the name of the current output file. */
115extern void set_current_output_filename (const char *fname);
116
117/* Expand macros and commands in the node name and canonicalize
118 whitespace in the resulting expansion. */
119extern char *expand_node_name (char *node);
120
121extern int number_of_node (char *node);
122
123extern void init_tag_table (void);
124extern void write_tag_table (char *filename);
125extern void free_node_references (void);
126extern void free_node_node_references (void);
127extern void validate_file (TAG_ENTRY *tag_table);
128extern void split_file (char *filename, int size);
129extern void clean_old_split_files (char *filename);
130
131#endif /* NODE_H */
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