1e264f62ca09a8f65c87a46d562a4d0f9ec5d457Shih-wei Liao/*- 2e264f62ca09a8f65c87a46d562a4d0f9ec5d457Shih-wei Liao * This code is derived from OpenBSD's libc/regex, original license follows: 3e264f62ca09a8f65c87a46d562a4d0f9ec5d457Shih-wei Liao * 4e264f62ca09a8f65c87a46d562a4d0f9ec5d457Shih-wei Liao * Copyright (c) 1992, 1993, 1994 Henry Spencer. 5e264f62ca09a8f65c87a46d562a4d0f9ec5d457Shih-wei Liao * Copyright (c) 1992, 1993, 1994 6e264f62ca09a8f65c87a46d562a4d0f9ec5d457Shih-wei Liao * The Regents of the University of California. All rights reserved. 7e264f62ca09a8f65c87a46d562a4d0f9ec5d457Shih-wei Liao * 8e264f62ca09a8f65c87a46d562a4d0f9ec5d457Shih-wei Liao * This code is derived from software contributed to Berkeley by 9e264f62ca09a8f65c87a46d562a4d0f9ec5d457Shih-wei Liao * Henry Spencer. 10e264f62ca09a8f65c87a46d562a4d0f9ec5d457Shih-wei Liao * 11e264f62ca09a8f65c87a46d562a4d0f9ec5d457Shih-wei Liao * Redistribution and use in source and binary forms, with or without 12e264f62ca09a8f65c87a46d562a4d0f9ec5d457Shih-wei Liao * modification, are permitted provided that the following conditions 13e264f62ca09a8f65c87a46d562a4d0f9ec5d457Shih-wei Liao * are met: 14e264f62ca09a8f65c87a46d562a4d0f9ec5d457Shih-wei Liao * 1. Redistributions of source code must retain the above copyright 15e264f62ca09a8f65c87a46d562a4d0f9ec5d457Shih-wei Liao * notice, this list of conditions and the following disclaimer. 16e264f62ca09a8f65c87a46d562a4d0f9ec5d457Shih-wei Liao * 2. Redistributions in binary form must reproduce the above copyright 17e264f62ca09a8f65c87a46d562a4d0f9ec5d457Shih-wei Liao * notice, this list of conditions and the following disclaimer in the 18e264f62ca09a8f65c87a46d562a4d0f9ec5d457Shih-wei Liao * documentation and/or other materials provided with the distribution. 19e264f62ca09a8f65c87a46d562a4d0f9ec5d457Shih-wei Liao * 3. Neither the name of the University nor the names of its contributors 20e264f62ca09a8f65c87a46d562a4d0f9ec5d457Shih-wei Liao * may be used to endorse or promote products derived from this software 21e264f62ca09a8f65c87a46d562a4d0f9ec5d457Shih-wei Liao * without specific prior written permission. 22e264f62ca09a8f65c87a46d562a4d0f9ec5d457Shih-wei Liao * 23e264f62ca09a8f65c87a46d562a4d0f9ec5d457Shih-wei Liao * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24e264f62ca09a8f65c87a46d562a4d0f9ec5d457Shih-wei Liao * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25e264f62ca09a8f65c87a46d562a4d0f9ec5d457Shih-wei Liao * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26e264f62ca09a8f65c87a46d562a4d0f9ec5d457Shih-wei Liao * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27e264f62ca09a8f65c87a46d562a4d0f9ec5d457Shih-wei Liao * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28e264f62ca09a8f65c87a46d562a4d0f9ec5d457Shih-wei Liao * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29e264f62ca09a8f65c87a46d562a4d0f9ec5d457Shih-wei Liao * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30e264f62ca09a8f65c87a46d562a4d0f9ec5d457Shih-wei Liao * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31e264f62ca09a8f65c87a46d562a4d0f9ec5d457Shih-wei Liao * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32e264f62ca09a8f65c87a46d562a4d0f9ec5d457Shih-wei Liao * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33e264f62ca09a8f65c87a46d562a4d0f9ec5d457Shih-wei Liao * SUCH DAMAGE. 34e264f62ca09a8f65c87a46d562a4d0f9ec5d457Shih-wei Liao * 35e264f62ca09a8f65c87a46d562a4d0f9ec5d457Shih-wei Liao * @(#)regex2.h 8.4 (Berkeley) 3/20/94 36e264f62ca09a8f65c87a46d562a4d0f9ec5d457Shih-wei Liao */ 37e264f62ca09a8f65c87a46d562a4d0f9ec5d457Shih-wei Liao 38cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines#ifndef LLVM_SUPPORT_REGEX2_H 39cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines#define LLVM_SUPPORT_REGEX2_H 40cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines 41e264f62ca09a8f65c87a46d562a4d0f9ec5d457Shih-wei Liao/* 42e264f62ca09a8f65c87a46d562a4d0f9ec5d457Shih-wei Liao * internals of regex_t 43e264f62ca09a8f65c87a46d562a4d0f9ec5d457Shih-wei Liao */ 44e264f62ca09a8f65c87a46d562a4d0f9ec5d457Shih-wei Liao#define MAGIC1 ((('r'^0200)<<8) | 'e') 45e264f62ca09a8f65c87a46d562a4d0f9ec5d457Shih-wei Liao 46e264f62ca09a8f65c87a46d562a4d0f9ec5d457Shih-wei Liao/* 47e264f62ca09a8f65c87a46d562a4d0f9ec5d457Shih-wei Liao * The internal representation is a *strip*, a sequence of 48e264f62ca09a8f65c87a46d562a4d0f9ec5d457Shih-wei Liao * operators ending with an endmarker. (Some terminology etc. is a 49e264f62ca09a8f65c87a46d562a4d0f9ec5d457Shih-wei Liao * historical relic of earlier versions which used multiple strips.) 50e264f62ca09a8f65c87a46d562a4d0f9ec5d457Shih-wei Liao * Certain oddities in the representation are there to permit running 51e264f62ca09a8f65c87a46d562a4d0f9ec5d457Shih-wei Liao * the machinery backwards; in particular, any deviation from sequential 52e264f62ca09a8f65c87a46d562a4d0f9ec5d457Shih-wei Liao * flow must be marked at both its source and its destination. Some 53e264f62ca09a8f65c87a46d562a4d0f9ec5d457Shih-wei Liao * fine points: 54e264f62ca09a8f65c87a46d562a4d0f9ec5d457Shih-wei Liao * 55e264f62ca09a8f65c87a46d562a4d0f9ec5d457Shih-wei Liao * - OPLUS_ and O_PLUS are *inside* the loop they create. 56e264f62ca09a8f65c87a46d562a4d0f9ec5d457Shih-wei Liao * - OQUEST_ and O_QUEST are *outside* the bypass they create. 57e264f62ca09a8f65c87a46d562a4d0f9ec5d457Shih-wei Liao * - OCH_ and O_CH are *outside* the multi-way branch they create, while 58e264f62ca09a8f65c87a46d562a4d0f9ec5d457Shih-wei Liao * OOR1 and OOR2 are respectively the end and the beginning of one of 59e264f62ca09a8f65c87a46d562a4d0f9ec5d457Shih-wei Liao * the branches. Note that there is an implicit OOR2 following OCH_ 60e264f62ca09a8f65c87a46d562a4d0f9ec5d457Shih-wei Liao * and an implicit OOR1 preceding O_CH. 61e264f62ca09a8f65c87a46d562a4d0f9ec5d457Shih-wei Liao * 62e264f62ca09a8f65c87a46d562a4d0f9ec5d457Shih-wei Liao * In state representations, an operator's bit is on to signify a state 63e264f62ca09a8f65c87a46d562a4d0f9ec5d457Shih-wei Liao * immediately *preceding* "execution" of that operator. 64e264f62ca09a8f65c87a46d562a4d0f9ec5d457Shih-wei Liao */ 65e264f62ca09a8f65c87a46d562a4d0f9ec5d457Shih-wei Liaotypedef unsigned long sop; /* strip operator */ 66e264f62ca09a8f65c87a46d562a4d0f9ec5d457Shih-wei Liaotypedef long sopno; 67e264f62ca09a8f65c87a46d562a4d0f9ec5d457Shih-wei Liao#define OPRMASK 0xf8000000LU 68e264f62ca09a8f65c87a46d562a4d0f9ec5d457Shih-wei Liao#define OPDMASK 0x07ffffffLU 69e264f62ca09a8f65c87a46d562a4d0f9ec5d457Shih-wei Liao#define OPSHIFT ((unsigned)27) 70e264f62ca09a8f65c87a46d562a4d0f9ec5d457Shih-wei Liao#define OP(n) ((n)&OPRMASK) 71e264f62ca09a8f65c87a46d562a4d0f9ec5d457Shih-wei Liao#define OPND(n) ((n)&OPDMASK) 72e264f62ca09a8f65c87a46d562a4d0f9ec5d457Shih-wei Liao#define SOP(op, opnd) ((op)|(opnd)) 73e264f62ca09a8f65c87a46d562a4d0f9ec5d457Shih-wei Liao/* operators meaning operand */ 74e264f62ca09a8f65c87a46d562a4d0f9ec5d457Shih-wei Liao/* (back, fwd are offsets) */ 75e264f62ca09a8f65c87a46d562a4d0f9ec5d457Shih-wei Liao#define OEND (1LU<<OPSHIFT) /* endmarker - */ 76e264f62ca09a8f65c87a46d562a4d0f9ec5d457Shih-wei Liao#define OCHAR (2LU<<OPSHIFT) /* character unsigned char */ 77e264f62ca09a8f65c87a46d562a4d0f9ec5d457Shih-wei Liao#define OBOL (3LU<<OPSHIFT) /* left anchor - */ 78e264f62ca09a8f65c87a46d562a4d0f9ec5d457Shih-wei Liao#define OEOL (4LU<<OPSHIFT) /* right anchor - */ 79e264f62ca09a8f65c87a46d562a4d0f9ec5d457Shih-wei Liao#define OANY (5LU<<OPSHIFT) /* . - */ 80e264f62ca09a8f65c87a46d562a4d0f9ec5d457Shih-wei Liao#define OANYOF (6LU<<OPSHIFT) /* [...] set number */ 81e264f62ca09a8f65c87a46d562a4d0f9ec5d457Shih-wei Liao#define OBACK_ (7LU<<OPSHIFT) /* begin \d paren number */ 82e264f62ca09a8f65c87a46d562a4d0f9ec5d457Shih-wei Liao#define O_BACK (8LU<<OPSHIFT) /* end \d paren number */ 83e264f62ca09a8f65c87a46d562a4d0f9ec5d457Shih-wei Liao#define OPLUS_ (9LU<<OPSHIFT) /* + prefix fwd to suffix */ 84e264f62ca09a8f65c87a46d562a4d0f9ec5d457Shih-wei Liao#define O_PLUS (10LU<<OPSHIFT) /* + suffix back to prefix */ 85e264f62ca09a8f65c87a46d562a4d0f9ec5d457Shih-wei Liao#define OQUEST_ (11LU<<OPSHIFT) /* ? prefix fwd to suffix */ 86e264f62ca09a8f65c87a46d562a4d0f9ec5d457Shih-wei Liao#define O_QUEST (12LU<<OPSHIFT) /* ? suffix back to prefix */ 87e264f62ca09a8f65c87a46d562a4d0f9ec5d457Shih-wei Liao#define OLPAREN (13LU<<OPSHIFT) /* ( fwd to ) */ 88e264f62ca09a8f65c87a46d562a4d0f9ec5d457Shih-wei Liao#define ORPAREN (14LU<<OPSHIFT) /* ) back to ( */ 89e264f62ca09a8f65c87a46d562a4d0f9ec5d457Shih-wei Liao#define OCH_ (15LU<<OPSHIFT) /* begin choice fwd to OOR2 */ 90e264f62ca09a8f65c87a46d562a4d0f9ec5d457Shih-wei Liao#define OOR1 (16LU<<OPSHIFT) /* | pt. 1 back to OOR1 or OCH_ */ 91e264f62ca09a8f65c87a46d562a4d0f9ec5d457Shih-wei Liao#define OOR2 (17LU<<OPSHIFT) /* | pt. 2 fwd to OOR2 or O_CH */ 92e264f62ca09a8f65c87a46d562a4d0f9ec5d457Shih-wei Liao#define O_CH (18LU<<OPSHIFT) /* end choice back to OOR1 */ 93e264f62ca09a8f65c87a46d562a4d0f9ec5d457Shih-wei Liao#define OBOW (19LU<<OPSHIFT) /* begin word - */ 94e264f62ca09a8f65c87a46d562a4d0f9ec5d457Shih-wei Liao#define OEOW (20LU<<OPSHIFT) /* end word - */ 95e264f62ca09a8f65c87a46d562a4d0f9ec5d457Shih-wei Liao 96e264f62ca09a8f65c87a46d562a4d0f9ec5d457Shih-wei Liao/* 97e264f62ca09a8f65c87a46d562a4d0f9ec5d457Shih-wei Liao * Structure for [] character-set representation. Character sets are 98e264f62ca09a8f65c87a46d562a4d0f9ec5d457Shih-wei Liao * done as bit vectors, grouped 8 to a byte vector for compactness. 99e264f62ca09a8f65c87a46d562a4d0f9ec5d457Shih-wei Liao * The individual set therefore has both a pointer to the byte vector 100e264f62ca09a8f65c87a46d562a4d0f9ec5d457Shih-wei Liao * and a mask to pick out the relevant bit of each byte. A hash code 101e264f62ca09a8f65c87a46d562a4d0f9ec5d457Shih-wei Liao * simplifies testing whether two sets could be identical. 102e264f62ca09a8f65c87a46d562a4d0f9ec5d457Shih-wei Liao * 103e264f62ca09a8f65c87a46d562a4d0f9ec5d457Shih-wei Liao * This will get trickier for multicharacter collating elements. As 104e264f62ca09a8f65c87a46d562a4d0f9ec5d457Shih-wei Liao * preliminary hooks for dealing with such things, we also carry along 105e264f62ca09a8f65c87a46d562a4d0f9ec5d457Shih-wei Liao * a string of multi-character elements, and decide the size of the 106e264f62ca09a8f65c87a46d562a4d0f9ec5d457Shih-wei Liao * vectors at run time. 107e264f62ca09a8f65c87a46d562a4d0f9ec5d457Shih-wei Liao */ 108e264f62ca09a8f65c87a46d562a4d0f9ec5d457Shih-wei Liaotypedef struct { 109e264f62ca09a8f65c87a46d562a4d0f9ec5d457Shih-wei Liao uch *ptr; /* -> uch [csetsize] */ 110e264f62ca09a8f65c87a46d562a4d0f9ec5d457Shih-wei Liao uch mask; /* bit within array */ 111e264f62ca09a8f65c87a46d562a4d0f9ec5d457Shih-wei Liao uch hash; /* hash code */ 112e264f62ca09a8f65c87a46d562a4d0f9ec5d457Shih-wei Liao size_t smultis; 113e264f62ca09a8f65c87a46d562a4d0f9ec5d457Shih-wei Liao char *multis; /* -> char[smulti] ab\0cd\0ef\0\0 */ 114e264f62ca09a8f65c87a46d562a4d0f9ec5d457Shih-wei Liao} cset; 115e264f62ca09a8f65c87a46d562a4d0f9ec5d457Shih-wei Liao/* note that CHadd and CHsub are unsafe, and CHIN doesn't yield 0/1 */ 116e264f62ca09a8f65c87a46d562a4d0f9ec5d457Shih-wei Liao#define CHadd(cs, c) ((cs)->ptr[(uch)(c)] |= (cs)->mask, (cs)->hash += (c)) 117e264f62ca09a8f65c87a46d562a4d0f9ec5d457Shih-wei Liao#define CHsub(cs, c) ((cs)->ptr[(uch)(c)] &= ~(cs)->mask, (cs)->hash -= (c)) 118e264f62ca09a8f65c87a46d562a4d0f9ec5d457Shih-wei Liao#define CHIN(cs, c) ((cs)->ptr[(uch)(c)] & (cs)->mask) 119e264f62ca09a8f65c87a46d562a4d0f9ec5d457Shih-wei Liao#define MCadd(p, cs, cp) mcadd(p, cs, cp) /* llvm_regcomp() internal fns */ 120e264f62ca09a8f65c87a46d562a4d0f9ec5d457Shih-wei Liao#define MCsub(p, cs, cp) mcsub(p, cs, cp) 121e264f62ca09a8f65c87a46d562a4d0f9ec5d457Shih-wei Liao#define MCin(p, cs, cp) mcin(p, cs, cp) 122e264f62ca09a8f65c87a46d562a4d0f9ec5d457Shih-wei Liao 123e264f62ca09a8f65c87a46d562a4d0f9ec5d457Shih-wei Liao/* stuff for character categories */ 124e264f62ca09a8f65c87a46d562a4d0f9ec5d457Shih-wei Liaotypedef unsigned char cat_t; 125e264f62ca09a8f65c87a46d562a4d0f9ec5d457Shih-wei Liao 126e264f62ca09a8f65c87a46d562a4d0f9ec5d457Shih-wei Liao/* 127e264f62ca09a8f65c87a46d562a4d0f9ec5d457Shih-wei Liao * main compiled-expression structure 128e264f62ca09a8f65c87a46d562a4d0f9ec5d457Shih-wei Liao */ 129e264f62ca09a8f65c87a46d562a4d0f9ec5d457Shih-wei Liaostruct re_guts { 130e264f62ca09a8f65c87a46d562a4d0f9ec5d457Shih-wei Liao int magic; 131e264f62ca09a8f65c87a46d562a4d0f9ec5d457Shih-wei Liao# define MAGIC2 ((('R'^0200)<<8)|'E') 132e264f62ca09a8f65c87a46d562a4d0f9ec5d457Shih-wei Liao sop *strip; /* malloced area for strip */ 133e264f62ca09a8f65c87a46d562a4d0f9ec5d457Shih-wei Liao int csetsize; /* number of bits in a cset vector */ 134e264f62ca09a8f65c87a46d562a4d0f9ec5d457Shih-wei Liao int ncsets; /* number of csets in use */ 135e264f62ca09a8f65c87a46d562a4d0f9ec5d457Shih-wei Liao cset *sets; /* -> cset [ncsets] */ 136e264f62ca09a8f65c87a46d562a4d0f9ec5d457Shih-wei Liao uch *setbits; /* -> uch[csetsize][ncsets/CHAR_BIT] */ 137e264f62ca09a8f65c87a46d562a4d0f9ec5d457Shih-wei Liao int cflags; /* copy of llvm_regcomp() cflags argument */ 138e264f62ca09a8f65c87a46d562a4d0f9ec5d457Shih-wei Liao sopno nstates; /* = number of sops */ 139e264f62ca09a8f65c87a46d562a4d0f9ec5d457Shih-wei Liao sopno firststate; /* the initial OEND (normally 0) */ 140e264f62ca09a8f65c87a46d562a4d0f9ec5d457Shih-wei Liao sopno laststate; /* the final OEND */ 141e264f62ca09a8f65c87a46d562a4d0f9ec5d457Shih-wei Liao int iflags; /* internal flags */ 142e264f62ca09a8f65c87a46d562a4d0f9ec5d457Shih-wei Liao# define USEBOL 01 /* used ^ */ 143e264f62ca09a8f65c87a46d562a4d0f9ec5d457Shih-wei Liao# define USEEOL 02 /* used $ */ 144e264f62ca09a8f65c87a46d562a4d0f9ec5d457Shih-wei Liao# define REGEX_BAD 04 /* something wrong */ 145e264f62ca09a8f65c87a46d562a4d0f9ec5d457Shih-wei Liao int nbol; /* number of ^ used */ 146e264f62ca09a8f65c87a46d562a4d0f9ec5d457Shih-wei Liao int neol; /* number of $ used */ 147e264f62ca09a8f65c87a46d562a4d0f9ec5d457Shih-wei Liao int ncategories; /* how many character categories */ 148e264f62ca09a8f65c87a46d562a4d0f9ec5d457Shih-wei Liao cat_t *categories; /* ->catspace[-CHAR_MIN] */ 149e264f62ca09a8f65c87a46d562a4d0f9ec5d457Shih-wei Liao char *must; /* match must contain this string */ 150e264f62ca09a8f65c87a46d562a4d0f9ec5d457Shih-wei Liao int mlen; /* length of must */ 151e264f62ca09a8f65c87a46d562a4d0f9ec5d457Shih-wei Liao size_t nsub; /* copy of re_nsub */ 152e264f62ca09a8f65c87a46d562a4d0f9ec5d457Shih-wei Liao int backrefs; /* does it use back references? */ 153e264f62ca09a8f65c87a46d562a4d0f9ec5d457Shih-wei Liao sopno nplus; /* how deep does it nest +s? */ 154e264f62ca09a8f65c87a46d562a4d0f9ec5d457Shih-wei Liao /* catspace must be last */ 155e264f62ca09a8f65c87a46d562a4d0f9ec5d457Shih-wei Liao cat_t catspace[1]; /* actually [NC] */ 156e264f62ca09a8f65c87a46d562a4d0f9ec5d457Shih-wei Liao}; 157e264f62ca09a8f65c87a46d562a4d0f9ec5d457Shih-wei Liao 158e264f62ca09a8f65c87a46d562a4d0f9ec5d457Shih-wei Liao/* misc utilities */ 159e264f62ca09a8f65c87a46d562a4d0f9ec5d457Shih-wei Liao#define OUT (CHAR_MAX+1) /* a non-character value */ 160e264f62ca09a8f65c87a46d562a4d0f9ec5d457Shih-wei Liao#define ISWORD(c) (isalnum(c&0xff) || (c) == '_') 161cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines 162cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines#endif 163