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/* search.h -- Structure used to search large bodies of text, with bounds.
$Id: search.h,v 1.7 2007/12/17 19:12:11 karl Exp $
Copyright (C) 1993, 1997, 1998, 2002, 2004, 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/>.
Originally written by Brian Fox (bfox@ai.mit.edu). */
/* The search functions take two arguments:
1) a string to search for, and
2) a pointer to a SEARCH_BINDING which contains the buffer, start,
and end of the search.
They return a long, which is the offset from the start of the buffer
at which the match was found. An offset of -1 indicates failure. */
#ifndef INFO_SEARCH_H
#define INFO_SEARCH_H
typedef struct {
char *buffer; /* The buffer of text to search. */
long start; /* Offset of the start of the search. */
long end; /* Offset of the end of the searh. */
int flags; /* Flags controlling the type of search. */
} SEARCH_BINDING;
#define S_FoldCase 0x01 /* Set means fold case in searches. */
#define S_SkipDest 0x02 /* Set means return pointing after the dest. */
SEARCH_BINDING *make_binding (char *buffer, long int start, long int end);
SEARCH_BINDING *copy_binding (SEARCH_BINDING *binding);
extern long search_forward (char *string, SEARCH_BINDING *binding);
extern long search_backward (char *input_string, SEARCH_BINDING *binding);
extern long search (char *string, SEARCH_BINDING *binding);
extern long regexp_search (char *regexp, SEARCH_BINDING *binding, long length);
extern int looking_at (char *string, SEARCH_BINDING *binding);
/* Note that STRING_IN_LINE () always returns the offset of the 1st character
after the string. */
extern int string_in_line (char *string, char *line);
/* Function names that start with "skip" are passed a string, and return
an offset from the start of that string. Function names that start
with "find" are passed a SEARCH_BINDING, and return an absolute position
marker of the item being searched for. "Find" functions return a value
of -1 if the item being looked for couldn't be found. */
extern int skip_whitespace (char *string);
extern int skip_non_whitespace (char *string);
extern int skip_whitespace_and_newlines (char *string);
extern int skip_line (char *string);
extern int skip_node_characters (char *string, int newlines_okay);
extern int skip_node_separator (char *body);
#define DONT_SKIP_NEWLINES 0
#define SKIP_NEWLINES 1
extern long find_node_separator (SEARCH_BINDING *binding);
extern long find_tags_table (SEARCH_BINDING *binding);
extern long find_node_in_binding (char *nodename, SEARCH_BINDING *binding);
#endif /* not INFO_SEARCH_H */
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