contrib/texinfo-4/makeinfo/node.h

   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. */
  29 typedef 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 \f
  60 /* Menu reference, *note reference, and validation hacking. */
  61
  62 /* A structure to remember references with.  A reference to a node is
  63    either an entry in a menu, or a cross-reference made with [px]ref. */
  64 typedef struct node_ref
  65 {
  66   struct node_ref *next;
  67   char *node;                   /* Name of node referred to. */
  68   char *containing_node;        /* Name of node containing this reference. */
  69   int line_no;                  /* Line number where the reference occurs. */
  70   int section;                  /* Section level where the reference occurs. */
  71   char *filename;               /* Name of file where the reference occurs. */
  72   enum reftype type;            /* Type of reference, either menu or note. */
  73   int number;                   /* Number for this node, relevant for
  74                                    HTML splitting -- from use+define
  75                                    order, not just define. */
  76 } NODE_REF;
  77
  78 /* The linked list of such structures. */
  79 extern NODE_REF *node_references;
  80
  81 /* A similar list for references occuring in @node next
  82    and similar references, needed for HTML. */
  83 extern NODE_REF *node_node_references;
  84
  85 /* List of all nodes.  */
  86 extern TAG_ENTRY *tag_table;
  87
  88 /* Counter for setting node_ref.number; zero is Top. */
  89 extern int node_number;
  90
  91 /* Node order counter.  */
  92 extern int node_order;
  93
  94 /* The current node's section level. */
  95 extern int current_section;
  96
  97 /* Nonzero when the next sectioning command should generate an anchor
  98    corresponding to the current node in HTML mode. */
  99 extern int outstanding_node;
 100 \f
 101 extern TAG_ENTRY *find_node (char *name);
 102
 103 /* A search string which is used to find a line defining a node. */
 104 DECLARE (char *, node_search_string, "\n@node ");
 105
 106 /* Extract node name from a menu item. */
 107 extern char *glean_node_from_menu (int remember_ref, enum reftype ref_type);
 108
 109 /* Remember a node for later validation.  */
 110 extern void remember_node_reference (char *node, int line, enum reftype type);
 111
 112 /* Remember the name of the current output file.  */
 113 extern void set_current_output_filename (const char *fname);
 114
 115 /* Expand macros and commands in the node name and canonicalize
 116    whitespace in the resulting expansion.  */
 117 extern char *expand_node_name (char *node);
 118
 119 extern int number_of_node (char *node);
 120
 121 extern void init_tag_table (void);
 122 extern void write_tag_table (char *filename);
 123 extern void free_node_references (void);
 124 extern void free_node_node_references (void);
 125 extern void validate_file (TAG_ENTRY *tag_table);
 126 extern void split_file (char *filename, int size);
 127 extern void clean_old_split_files (char *filename);
 128
 129 #endif /* NODE_H */