tre_parse.hpp

00001 #line 8719 "./lpsrc/tre.pak"
00002 /*
00003   tre-parse.c - Regexp parser definitions
00004 
00005   Copyright (C) 2001-2004 Ville Laurikari <vl@iki.fi>
00006 
00007   This program is free software; you can redistribute it and/or modify
00008   it under the terms of the GNU General Public License version 2 (June
00009   1991) as published by the Free Software Foundation.
00010 
00011   This program is distributed in the hope that it will be useful,
00012   but WITHOUT ANY WARRANTY; without even the implied warranty of
00013   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00014   GNU General Public License for more details.
00015 
00016   You should have received a copy of the GNU General Public License
00017   along with this program; if not, write to the Free Software
00018   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
00019 */
00020 
00021 #ifndef TRE_PARSE_H
00022 #define TRE_PARSE_H 1
00023 
00024 /* Parse context. */
00025 typedef struct {
00026   /* Memory allocator.  The AST is allocated using this. */
00027   tre_mem_t mem;
00028   /* Stack used for keeping track of regexp syntax. */
00029   tre_stack_t *stack;
00030   /* The parse result. */
00031   tre_ast_node_t *result;
00032   /* The regexp to parse and its length. */
00033   const tre_char_t *re;
00034   /* The first character of the entire regexp. */
00035   const tre_char_t *re_start;
00036   /* The first character after the end of the regexp. */
00037   const tre_char_t *re_end;
00038   int len;
00039   /* Current submatch ID. */
00040   int submatch_id;
00041   /* Current position (number of literal). */
00042   int position;
00043   /* The highest back reference or -1 if none seen so far. */
00044   int max_backref;
00045   /* This flag is set if the regexp uses approximate matching. */
00046   int have_approx;
00047   /* Compilation flags. */
00048   int cflags;
00049   /* If this flag is set the top-level submatch is not captured. */
00050   int nofirstsub;
00051   /* The currently set approximate matching parameters. */
00052   int params[TRE_PARAM_LAST];
00053 } tre_parse_ctx_t;
00054 
00055 /* Parses a wide character regexp pattern into a syntax tree.  This parser
00056    handles both syntaxes (BRE and ERE), including the TRE extensions. */
00057 reg_errcode_t
00058 tre_parse(tre_parse_ctx_t *ctx);
00059 
00060 #endif /* TRE_PARSE_H */
00061 
00062 /* EOF */

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