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/* info-utils.h -- Exported functions and variables from info-util.c.
$Id: info-utils.h,v 1.1 1998/03/03 20:25:13 millert Exp $
This file is part of GNU Info, a program for reading online documentation
stored in Info format.
Copyright (C) 1993, 96 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
Written by Brian Fox (bfox@ai.mit.edu). */
#if !defined (_INFO_UTILS_H_)
#define _INFO_UTILS_H_
#if !defined (HAVE_STRCHR)
# undef strchr
# undef strrchr
# define strchr index
# define strrchr rindex
#endif /* !HAVE_STRCHR */
#include "nodes.h"
#include "window.h"
#include "search.h"
/* Structure which describes a node reference, such as a menu entry or
cross reference. Arrays of such references can be built by calling
info_menus_of_node () or info_xrefs_of_node (). */
typedef struct {
char *label; /* User Label. */
char *filename; /* File where this node can be found. */
char *nodename; /* Name of the node. */
int start, end; /* Offsets within the containing node of LABEL. */
} REFERENCE;
/* When non-zero, various display and input functions handle ISO Latin
character sets correctly. */
extern int ISO_Latin_p;
/* Variable which holds the most recent filename parsed as a result of
calling info_parse_xxx (). */
extern char *info_parsed_filename;
/* Variable which holds the most recent nodename parsed as a result of
calling info_parse_xxx (). */
extern char *info_parsed_nodename;
/* Parse the filename and nodename out of STRING. If STRING doesn't
contain a filename (i.e., it is NOT (FILENAME)NODENAME) then set
INFO_PARSED_FILENAME to NULL. If second argument NEWLINES_OKAY is
non-zero, it says to allow the nodename specification to cross a
newline boundary (i.e., only `,', `.', or `TAB' can end the spec). */
void info_parse_node ();
/* Return a NULL terminated array of REFERENCE * which represents the menu
found in NODE. If there is no menu in NODE, just return a NULL pointer. */
extern REFERENCE **info_menu_of_node ();
/* Return a NULL terminated array of REFERENCE * which represents the cross
refrences found in NODE. If there are no cross references in NODE, just
return a NULL pointer. */
extern REFERENCE **info_xrefs_of_node ();
/* Glean cross references from BINDING->buffer + BINDING->start until
BINDING->end. Return an array of REFERENCE * that represents each
cross reference in this range. */
extern REFERENCE **info_xrefs ();
/* Get the entry associated with LABEL in REFERENCES. Return a pointer to
the reference if found, or NULL. */
extern REFERENCE *info_get_labeled_reference ();
/* Glean menu entries from BINDING->buffer + BINDING->start until we
have looked at the entire contents of BINDING. Return an array
of REFERENCE * that represents each menu item in this range. */
extern REFERENCE **info_menu_items ();
/* A utility function for concatenating REFERENCE **. Returns a new
REFERENCE ** which is the concatenation of REF1 and REF2. The REF1
and REF2 arrays are freed, but their contents are not. */
REFERENCE **info_concatenate_references ();
/* Free the data associated with REFERENCES. */
extern void info_free_references ();
/* Search for sequences of whitespace or newlines in STRING, replacing
all such sequences with just a single space. Remove whitespace from
start and end of string. */
void canonicalize_whitespace ();
/* Return a pointer to a string which is the printed representation
of CHARACTER if it were printed at HPOS. */
extern char *printed_representation ();
/* Return a pointer to the part of PATHNAME that simply defines the file. */
extern char *filename_non_directory ();
/* Return non-zero if NODE is one especially created by Info. */
extern int internal_info_node_p ();
/* Make NODE appear to be one especially created by Info, and give it NAME. */
extern void name_internal_node ();
/* Return the window displaying NAME, the name of an internally created
Info window. */
extern WINDOW *get_internal_info_window ();
/* Return the node addressed by LABEL in NODE (usually one of "Prev:",
"Next:", "Up:", "File:", or "Node:". After a call to this function,
the global INFO_PARSED_NODENAME and INFO_PARSED_FILENAME contain
the information. */
extern void info_parse_label (/* label, node */);
#define info_label_was_found \
(info_parsed_nodename != NULL || info_parsed_filename != NULL)
#define info_file_label_of_node(n) info_parse_label (INFO_FILE_LABEL, n)
#define info_next_label_of_node(n) info_parse_label (INFO_NEXT_LABEL, n)
#define info_up_label_of_node(n) info_parse_label (INFO_UP_LABEL, n)
#define info_prev_label_of_node(n) \
do { \
info_parse_label (INFO_PREV_LABEL, n); \
if (!info_label_was_found) \
info_parse_label (INFO_ALTPREV_LABEL, n); \
} while (0)
#endif /* !_INFO_UTILS_H_ */
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