/*- * This code is derived from OpenBSD's libc/regex, original license follows: * * Copyright (c) 1992, 1993, 1994 Henry Spencer. * Copyright (c) 1992, 1993, 1994 * The Regents of the University of California. All rights reserved. * * This code is derived from software contributed to Berkeley by * Henry Spencer. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * @(#)regex2.h 8.4 (Berkeley) 3/20/94 */ #ifndef LLVM_SUPPORT_REGEX2_H #define LLVM_SUPPORT_REGEX2_H #include "regutils.h" #include <stddef.h> /* * internals of regex_t */ #define MAGIC1 … /* * The internal representation is a *strip*, a sequence of * operators ending with an endmarker. (Some terminology etc. is a * historical relic of earlier versions which used multiple strips.) * Certain oddities in the representation are there to permit running * the machinery backwards; in particular, any deviation from sequential * flow must be marked at both its source and its destination. Some * fine points: * * - OPLUS_ and O_PLUS are *inside* the loop they create. * - OQUEST_ and O_QUEST are *outside* the bypass they create. * - OCH_ and O_CH are *outside* the multi-way branch they create, while * OOR1 and OOR2 are respectively the end and the beginning of one of * the branches. Note that there is an implicit OOR2 following OCH_ * and an implicit OOR1 preceding O_CH. * * In state representations, an operator's bit is on to signify a state * immediately *preceding* "execution" of that operator. */ sop; /* strip operator */ sopno; #define OPRMASK … #define OPDMASK … #define OPSHIFT … #define OP(n) … #define OPND(n) … #define SOP(op, opnd) … /* operators meaning operand */ /* (back, fwd are offsets) */ #define OEND … #define OCHAR … #define OBOL … #define OEOL … #define OANY … #define OANYOF … #define OBACK_ … #define O_BACK … #define OPLUS_ … #define O_PLUS … #define OQUEST_ … #define O_QUEST … #define OLPAREN … #define ORPAREN … #define OCH_ … #define OOR1 … #define OOR2 … #define O_CH … #define OBOW … #define OEOW … /* * Structure for [] character-set representation. Character sets are * done as bit vectors, grouped 8 to a byte vector for compactness. * The individual set therefore has both a pointer to the byte vector * and a mask to pick out the relevant bit of each byte. A hash code * simplifies testing whether two sets could be identical. * * This will get trickier for multicharacter collating elements. As * preliminary hooks for dealing with such things, we also carry along * a string of multi-character elements, and decide the size of the * vectors at run time. */ cset; /* note that CHadd and CHsub are unsafe, and CHIN doesn't yield 0/1 */ #define CHadd(cs, c) … #define CHsub(cs, c) … #define CHIN(cs, c) … #define MCadd(p, cs, cp) … #define MCsub(p, cs, cp) … #define MCin(p, cs, cp) … /* stuff for character categories */ cat_t; /* * main compiled-expression structure */ struct re_guts { … }; /* misc utilities */ #define OUT … #define ISWORD(c) … #endif
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