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/*
tre-parse.c - Regexp parser definitions
Copyright (C) 2001-2004 Ville Laurikari <vl@iki.fi>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License version 2 (June
1991) as published by the Free Software Foundation.
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
*/
#ifndef TRE_PARSE_H
#define TRE_PARSE_H 1
/* Parse context. */
typedef struct {
/* Memory allocator. The AST is allocated using this. */
tre_mem_t mem;
/* Stack used for keeping track of regexp syntax. */
tre_stack_t *stack;
/* The parse result. */
tre_ast_node_t *result;
/* The regexp to parse and its length. */
const tre_char_t *re;
/* The first character of the entire regexp. */
const tre_char_t *re_start;
/* The first character after the end of the regexp. */
const tre_char_t *re_end;
int len;
/* Current submatch ID. */
int submatch_id;
/* Current position (number of literal). */
int position;
/* The highest back reference or -1 if none seen so far. */
int max_backref;
/* This flag is set if the regexp uses approximate matching. */
int have_approx;
/* Compilation flags. */
int cflags;
/* If this flag is set the top-level submatch is not captured. */
int nofirstsub;
/* The currently set approximate matching parameters. */
int params[TRE_PARAM_LAST];
} tre_parse_ctx_t;
/* Parses a wide character regexp pattern into a syntax tree. This parser
handles both syntaxes (BRE and ERE), including the TRE extensions. */
reg_errcode_t
tre_parse(tre_parse_ctx_t *ctx);
#endif /* TRE_PARSE_H */
/* EOF */
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