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+/* index.h -- declarations for index.c.
+   $Id: index.h,v 1.6 2007/09/26 20:53:40 karl Exp $
+
+   Copyright (C) 1998, 1999, 2007 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 3 of the License, 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, see <http://www.gnu.org/licenses/>.  */
+
+#ifndef INDEX_H
+#define INDEX_H
+
+#include "makeinfo.h"
+#include "cmds.h"
+
+extern int printing_index;
+extern int defined_indices;
+extern int index_counter;
+
+/* User commands are only new indices.  (Macros are handled separately.)  */
+extern COMMAND **user_command_array;
+extern int user_command_array_len;
+
+/* An index element... */
+typedef struct index_elt
+{
+  struct index_elt *next;
+  char *entry;                  /* The index entry itself, after expansion. */
+  char *entry_text;             /* The original, non-expanded entry text. */
+  char *node;                   /* The node from whence it came. */
+  char *section;                /* Current section number we are in, */
+  char *section_name;           /* ... and its title.  */
+  int code;                     /* Nonzero means add `@code{...}' when
+                                   printing this element. */
+  int defining_line;            /* Line number where this entry was written. */
+  int output_line;              /* And line number where it is in the output. */
+  char *defining_file;          /* Source file for defining_line. */
+  char *output_file;            /* Output file for output_line. */
+  int entry_number;             /* Entry number.  */
+} INDEX_ELT;
+
+
+/* A list of short-names for each index.
+   There are two indices into the the_indices array.
+   * read_index is the index that points to the list of index
+     entries that we will find if we ask for the list of entries for
+     this name.
+   * write_index is the index that points to the list of index entries
+     that we will add new entries to.
+
+   Initially, read_index and write_index are the same, but the
+   @syncodeindex and @synindex commands can change the list we add
+   entries to.
+
+   For example, after the commands
+     @cindex foo
+     @defindex ii
+     @synindex cp ii
+     @cindex bar
+
+   the cp index will contain the entry `foo', and the new ii
+   index will contain the entry `bar'.  This is consistent with the
+   way texinfo.tex handles the same situation.
+
+   In addition, for each index, it is remembered whether that index is
+   a code index or not.  Code indices have @code{} inserted around the
+   first word when they are printed with printindex. */
+typedef struct
+{
+  char *name;
+  int read_index;   /* index entries for `name' */
+  int write_index;  /* store index entries here, @synindex can change it */
+  int code;
+} INDEX_ALIST;
+
+extern INDEX_ALIST **name_index_alist;
+
+/* Initialize all indices.  */
+extern void init_indices (void);
+
+INDEX_ELT *index_list (char *name);
+
+#endif /* !INDEX_H */