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/* search.h -- Structure used to search large bodies of text, with bounds.
Copyright 1993-2022 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. */
/* 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
#include "window.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. */
enum search_result
{
search_success,
search_not_found,
search_invalid
};
enum search_result search_forward (char *string,
SEARCH_BINDING *binding, long *poff);
enum search_result search_backward (char *input_string,
SEARCH_BINDING *binding,
long *poff);
enum search_result search (char *string, SEARCH_BINDING *binding,
long *poff);
enum search_result regexp_search (char *regexp,
int is_literal, int is_insensitive,
char *buffer, size_t buflen,
MATCH_STATE *match_state);
int looking_at (char *string, SEARCH_BINDING *binding);
int looking_at_line (char *string, char *pointer);
/* Note that STRING_IN_LINE () always returns the offset of the 1st character
after the string. */
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. */
int skip_whitespace (char *string);
int skip_non_whitespace (char *string);
int skip_whitespace_and_newlines (char *string);
int skip_node_separator (char *body);
long find_node_separator (SEARCH_BINDING *binding);
long find_file_section (SEARCH_BINDING *binding, char *label);
long find_node_in_binding (char *nodename, SEARCH_BINDING *binding);
regmatch_t match_by_index (MATCH_STATE *state, int index);
enum search_result match_in_match_list (MATCH_STATE *state,
long start, long end, int dir, int *match_index);
void free_matches (MATCH_STATE *state);
int matches_ready (MATCH_STATE *state);
int at_end_of_matches (MATCH_STATE *state, int index);
void decide_if_in_match (long off, int *in_match, MATCH_STATE *matches,
size_t *match_index);
#endif /* not INFO_SEARCH_H */
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