/* * This file is part of DGD, http://dgd-osr.sourceforge.net/ * Copyright (C) 1993-2010 Dworkin B.V. * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU Affero 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 Affero General Public License for more details. * * You should have received a copy of the GNU Affero General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. */ /* * Regular expressions, ex-style. Allocating and freeing memory for each * regular expression would cause memory problems, so a buffer is allocated * instead in which a regular expression can be compiled. */ # define RXBUFSZ 2048 # define NSUBEXP 9 typedef struct { bool valid; /* is the present matcher valid? */ bool anchor; /* is the match anchored (^pattern) */ char firstc; /* first character in match, if any */ char *start; /* start of matching sequence */ int size; /* size of matching sequence */ struct { char *start; /* start of subexpression */ int size; /* size of subexpression */ } se[NSUBEXP]; char buffer[RXBUFSZ]; /* buffer to hold matcher */ } rxbuf; extern rxbuf *rx_new P((void)); extern void rx_del P((rxbuf*)); extern char *rx_comp P((rxbuf*, char*)); extern int rx_exec P((rxbuf*, char*, int, int));