1 /* info-utils.h -- Exported functions and variables from info-utils.c.
2 $Id: info-utils.h,v 1.8 2008/05/10 14:39:04 gray Exp $
4 Copyright (C) 1993, 1996, 1998, 2002, 2003, 2004, 2007 Free Software
7 This program is free software: you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation, either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <http://www.gnu.org/licenses/>.
20 Written by Brian Fox (bfox@ai.mit.edu). */
29 /* Structure which describes a node reference, such as a menu entry or
30 cross reference. Arrays of such references can be built by calling
31 info_menus_of_node () or info_xrefs_of_node (). */
33 char *label; /* User Label. */
34 char *filename; /* File where this node can be found. */
35 char *nodename; /* Name of the node. */
36 int start, end; /* Offsets within the containing node of LABEL. */
37 int line_number; /* Specific line number a menu item points to. */
40 /* When non-zero, various display and input functions handle ISO Latin
41 character sets correctly. */
42 extern int ISO_Latin_p;
44 /* Variable which holds the most recent filename parsed as a result of
45 calling info_parse_xxx (). */
46 extern char *info_parsed_filename;
48 /* Variable which holds the most recent nodename parsed as a result of
49 calling info_parse_xxx (). */
50 extern char *info_parsed_nodename;
52 /* Parse the filename and nodename out of STRING. If STRING doesn't
53 contain a filename (i.e., it is NOT (FILENAME)NODENAME) then set
54 INFO_PARSED_FILENAME to NULL. If second argument NEWLINES_OKAY is
55 non-zero, it says to allow the nodename specification to cross a
56 newline boundary (i.e., only `,', `.', or `TAB' can end the spec). */
57 void info_parse_node (char *string, int newlines_okay);
59 /* Return a NULL terminated array of REFERENCE * which represents the menu
60 found in NODE. If there is no menu in NODE, just return a NULL pointer. */
61 extern REFERENCE **info_menu_of_node (NODE *node);
63 /* Return a NULL terminated array of REFERENCE * which represents the cross
64 refrences found in NODE. If there are no cross references in NODE, just
65 return a NULL pointer. */
66 extern REFERENCE **info_xrefs_of_node (NODE *node);
68 /* Glean cross references from BINDING->buffer + BINDING->start until
69 BINDING->end. Return an array of REFERENCE * that represents each
70 cross reference in this range. */
71 extern REFERENCE **info_xrefs (SEARCH_BINDING *binding);
73 /* Get the entry associated with LABEL in REFERENCES. Return a pointer to
74 the reference if found, or NULL. */
75 extern REFERENCE *info_get_labeled_reference (char *label,
76 REFERENCE **references);
78 /* Glean menu entries from BINDING->buffer + BINDING->start until we
79 have looked at the entire contents of BINDING. Return an array
80 of REFERENCE * that represents each menu item in this range. */
81 extern REFERENCE **info_menu_items (SEARCH_BINDING *binding);
83 /* A utility function for concatenating REFERENCE **. Returns a new
84 REFERENCE ** which is the concatenation of REF1 and REF2. The REF1
85 and REF2 arrays are freed, but their contents are not. */
86 REFERENCE **info_concatenate_references (REFERENCE **ref1, REFERENCE **ref2);
88 /* Copy an existing reference into new memory. */
89 extern REFERENCE *info_copy_reference (REFERENCE *src);
91 /* Free the data associated with REFERENCES. */
92 extern void info_free_references (REFERENCE **references);
94 /* Search for sequences of whitespace or newlines in STRING, replacing
95 all such sequences with just a single space. Remove whitespace from
96 start and end of string. */
97 void canonicalize_whitespace (char *string);
99 /* Return a pointer to a string which is the printed representation
100 of CHARACTER if it were printed at HPOS. */
101 extern char *printed_representation (const unsigned char *cp, size_t len,
102 size_t hpos, size_t *plen);
104 /* Return a pointer to the part of PATHNAME that simply defines the file. */
105 extern char *filename_non_directory (char *pathname);
107 /* Return non-zero if NODE is one especially created by Info. */
108 extern int internal_info_node_p (NODE *node);
110 /* Make NODE appear to be one especially created by Info, and give it NAME. */
111 extern void name_internal_node (NODE *node, char *name);
113 /* Return the window displaying NAME, the name of an internally created
115 extern WINDOW *get_internal_info_window (char *name);
117 /* Return a window displaying the node NODE. */
118 extern WINDOW *get_window_of_node (NODE *node);
120 /* Return the node addressed by LABEL in NODE (usually one of "Prev:",
121 "Next:", "Up:", "File:", or "Node:". After a call to this function,
122 the globals `info_parsed_nodename' and `info_parsed_filename' contain
124 extern void info_parse_label (char *label, NODE *node);
126 #define info_file_label_of_node(n) info_parse_label (INFO_FILE_LABEL, n)
127 #define info_next_label_of_node(n) info_parse_label (INFO_NEXT_LABEL, n)
128 #define info_up_label_of_node(n) info_parse_label (INFO_UP_LABEL, n)
129 #define info_prev_label_of_node(n) \
131 info_parse_label (INFO_PREV_LABEL, n); \
132 if (!info_parsed_nodename && !info_parsed_filename) \
133 info_parse_label (INFO_ALTPREV_LABEL, n); \
136 #endif /* not INFO_UTILS_H */