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56
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Copyright 1992, 1993, 1994 Henry Spencer. All rights reserved.
This software is not subject to any license of the American Telephone
and Telegraph Company or of the Regents of the University of California.
Permission is granted to anyone to use this software for any purpose on
any computer system, and to alter it and redistribute it, subject
to the following restrictions:
1. The author is not responsible for the consequences of use of this
software, no matter how awful, even if they arise from flaws in it.
2. The origin of this software must not be misrepresented, either by
explicit claim or by omission. Since few users ever read sources,
credits must appear in the documentation.
3. Altered versions must be plainly marked as such, and must not be
misrepresented as being the original software. Since few users
ever read sources, credits must appear in the documentation.
4. This notice may not be removed or altered.
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
/*-
* Copyright (c) 1994
* The Regents of the University of California. All rights reserved.
*
* 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. 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.
*
* @(#)COPYRIGHT 8.1 (Berkeley) 3/16/94
*/

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# @(#)WHATSNEW 8.3 (Berkeley) 3/18/94
New in alpha3.4: The complex bug alluded to below has been fixed (in a
slightly kludgey temporary way that may hurt efficiency a bit; this is
another "get it out the door for 4.4" release). The tests at the end of
the tests file have accordingly been uncommented. The primary sign of
the bug was that something like a?b matching ab matched b rather than ab.
(The bug was essentially specific to this exact situation, else it would
have shown up earlier.)
New in alpha3.3: The definition of word boundaries has been altered
slightly, to more closely match the usual programming notion that "_"
is an alphabetic. Stuff used for pre-ANSI systems is now in a subdir,
and the makefile no longer alludes to it in mysterious ways. The
makefile has generally been cleaned up some. Fixes have been made
(again!) so that the regression test will run without -DREDEBUG, at
the cost of weaker checking. A workaround for a bug in some folks'
<assert.h> has been added. And some more things have been added to
tests, including a couple right at the end which are commented out
because the code currently flunks them (complex bug; fix coming).
Plus the usual minor cleanup.
New in alpha3.2: Assorted bits of cleanup and portability improvement
(the development base is now a BSDI system using GCC instead of an ancient
Sun system, and the newer compiler exposed some glitches). Fix for a
serious bug that affected REs using many [] (including REG_ICASE REs
because of the way they are implemented), *sometimes*, depending on
memory-allocation patterns. The header-file prototypes no longer name
the parameters, avoiding possible name conflicts. The possibility that
some clot has defined CHAR_MIN as (say) `-128' instead of `(-128)' is
now handled gracefully. "uchar" is no longer used as an internal type
name (too many people have the same idea). Still the same old lousy
performance, alas.
New in alpha3.1: Basically nothing, this release is just a bookkeeping
convenience. Stay tuned.
New in alpha3.0: Performance is no better, alas, but some fixes have been
made and some functionality has been added. (This is basically the "get
it out the door in time for 4.4" release.) One bug fix: regfree() didn't
free the main internal structure (how embarrassing). It is now possible
to put NULs in either the RE or the target string, using (resp.) a new
REG_PEND flag and the old REG_STARTEND flag. The REG_NOSPEC flag to
regcomp() makes all characters ordinary, so you can match a literal
string easily (this will become more useful when performance improves!).
There are now primitives to match beginnings and ends of words, although
the syntax is disgusting and so is the implementation. The REG_ATOI
debugging interface has changed a bit. And there has been considerable
internal cleanup of various kinds.
New in alpha2.3: Split change list out of README, and moved flags notes
into Makefile. Macro-ized the name of regex(7) in regex(3), since it has
to change for 4.4BSD. Cleanup work in engine.c, and some new regression
tests to catch tricky cases thereof.
New in alpha2.2: Out-of-date manpages updated. Regerror() acquires two
small extensions -- REG_ITOA and REG_ATOI -- which avoid debugging kludges
in my own test program and might be useful to others for similar purposes.
The regression test will now compile (and run) without REDEBUG. The
BRE \$ bug is fixed. Most uses of "uchar" are gone; it's all chars now.
Char/uchar parameters are now written int/unsigned, to avoid possible
portability problems with unpromoted parameters. Some unsigned casts have
been introduced to minimize portability problems with shifting into sign
bits.
New in alpha2.1: Lots of little stuff, cleanup and fixes. The one big
thing is that regex.h is now generated, using mkh, rather than being
supplied in the distribution; due to circularities in dependencies,
you have to build regex.h explicitly by "make h". The two known bugs
have been fixed (and the regression test now checks for them), as has a
problem with assertions not being suppressed in the absence of REDEBUG.
No performance work yet.
New in alpha2: Backslash-anything is an ordinary character, not an
error (except, of course, for the handful of backslashed metacharacters
in BREs), which should reduce script breakage. The regression test
checks *where* null strings are supposed to match, and has generally
been tightened up somewhat. Small bug fixes in parameter passing (not
harmful, but technically errors) and some other areas. Debugging
invoked by defining REDEBUG rather than not defining NDEBUG.
New in alpha+3: full prototyping for internal routines, using a little
helper program, mkh, which extracts prototypes given in stylized comments.
More minor cleanup. Buglet fix: it's CHAR_BIT, not CHAR_BITS. Simple
pre-screening of input when a literal string is known to be part of the
RE; this does wonders for performance.
New in alpha+2: minor bits of cleanup. Notably, the number "32" for the
word width isn't hardwired into regexec.c any more, the public header
file prototypes the functions if __STDC__ is defined, and some small typos
in the manpages have been fixed.
New in alpha+1: improvements to the manual pages, and an important
extension, the REG_STARTEND option to regexec().

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/*-
* 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. 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.
*
* @(#)cclass.h 8.3 (Berkeley) 3/20/94
*/
/* character-class table */
static struct cclass {
char *name;
char *chars;
char *multis;
} cclasses[] = {
"alnum", "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz\
0123456789", "",
"alpha", "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz",
"",
"blank", " \t", "",
"cntrl", "\007\b\t\n\v\f\r\1\2\3\4\5\6\16\17\20\21\22\23\24\
\25\26\27\30\31\32\33\34\35\36\37\177", "",
"digit", "0123456789", "",
"graph", "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz\
0123456789!\"#$%&'()*+,-./:;<=>?@[\\]^_`{|}~",
"",
"lower", "abcdefghijklmnopqrstuvwxyz",
"",
"print", "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz\
0123456789!\"#$%&'()*+,-./:;<=>?@[\\]^_`{|}~ ",
"",
"punct", "!\"#$%&'()*+,-./:;<=>?@[\\]^_`{|}~",
"",
"space", "\t\n\v\f\r ", "",
"upper", "ABCDEFGHIJKLMNOPQRSTUVWXYZ",
"",
"xdigit", "0123456789ABCDEFabcdef",
"",
NULL, 0, ""
};

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/*-
* 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. 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.
*
* @(#)cname.h 8.3 (Berkeley) 3/20/94
*/
/* character-name table */
static struct cname {
char *name;
char code;
} cnames[] = {
"NUL", '\0',
"SOH", '\001',
"STX", '\002',
"ETX", '\003',
"EOT", '\004',
"ENQ", '\005',
"ACK", '\006',
"BEL", '\007',
"alert", '\007',
"BS", '\010',
"backspace", '\b',
"HT", '\011',
"tab", '\t',
"LF", '\012',
"newline", '\n',
"VT", '\013',
"vertical-tab", '\v',
"FF", '\014',
"form-feed", '\f',
"CR", '\015',
"carriage-return", '\r',
"SO", '\016',
"SI", '\017',
"DLE", '\020',
"DC1", '\021',
"DC2", '\022',
"DC3", '\023',
"DC4", '\024',
"NAK", '\025',
"SYN", '\026',
"ETB", '\027',
"CAN", '\030',
"EM", '\031',
"SUB", '\032',
"ESC", '\033',
"IS4", '\034',
"FS", '\034',
"IS3", '\035',
"GS", '\035',
"IS2", '\036',
"RS", '\036',
"IS1", '\037',
"US", '\037',
"space", ' ',
"exclamation-mark", '!',
"quotation-mark", '"',
"number-sign", '#',
"dollar-sign", '$',
"percent-sign", '%',
"ampersand", '&',
"apostrophe", '\'',
"left-parenthesis", '(',
"right-parenthesis", ')',
"asterisk", '*',
"plus-sign", '+',
"comma", ',',
"hyphen", '-',
"hyphen-minus", '-',
"period", '.',
"full-stop", '.',
"slash", '/',
"solidus", '/',
"zero", '0',
"one", '1',
"two", '2',
"three", '3',
"four", '4',
"five", '5',
"six", '6',
"seven", '7',
"eight", '8',
"nine", '9',
"colon", ':',
"semicolon", ';',
"less-than-sign", '<',
"equals-sign", '=',
"greater-than-sign", '>',
"question-mark", '?',
"commercial-at", '@',
"left-square-bracket", '[',
"backslash", '\\',
"reverse-solidus", '\\',
"right-square-bracket", ']',
"circumflex", '^',
"circumflex-accent", '^',
"underscore", '_',
"low-line", '_',
"grave-accent", '`',
"left-brace", '{',
"left-curly-bracket", '{',
"vertical-line", '|',
"right-brace", '}',
"right-curly-bracket", '}',
"tilde", '~',
"DEL", '\177',
NULL, 0,
};

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/*-
* 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. 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.
*
* @(#)regerror.c 8.4 (Berkeley) 3/20/94
*/
#if defined(LIBC_SCCS) && !defined(lint)
static char sccsid[] = "@(#)regerror.c 8.4 (Berkeley) 3/20/94";
#endif /* LIBC_SCCS and not lint */
#include <sys/types.h>
#include <stdio.h>
#include <string.h>
#include <ctype.h>
#include <limits.h>
#include <stdlib.h>
#include <regex.h>
#include "utils.h"
/* ========= begin header generated by ./mkh ========= */
#ifdef __cplusplus
extern "C" {
#endif
/* === regerror.c === */
static char *regatoi __P((const regex_t *preg, char *localbuf));
#ifdef __cplusplus
}
#endif
/* ========= end header generated by ./mkh ========= */
/*
= #define REG_NOMATCH 1
= #define REG_BADPAT 2
= #define REG_ECOLLATE 3
= #define REG_ECTYPE 4
= #define REG_EESCAPE 5
= #define REG_ESUBREG 6
= #define REG_EBRACK 7
= #define REG_EPAREN 8
= #define REG_EBRACE 9
= #define REG_BADBR 10
= #define REG_ERANGE 11
= #define REG_ESPACE 12
= #define REG_BADRPT 13
= #define REG_EMPTY 14
= #define REG_ASSERT 15
= #define REG_INVARG 16
= #define REG_ATOI 255 // convert name to number (!)
= #define REG_ITOA 0400 // convert number to name (!)
*/
static struct rerr {
int code;
char *name;
char *explain;
} rerrs[] = {
REG_NOMATCH, "REG_NOMATCH", "regexec() failed to match",
REG_BADPAT, "REG_BADPAT", "invalid regular expression",
REG_ECOLLATE, "REG_ECOLLATE", "invalid collating element",
REG_ECTYPE, "REG_ECTYPE", "invalid character class",
REG_EESCAPE, "REG_EESCAPE", "trailing backslash (\\)",
REG_ESUBREG, "REG_ESUBREG", "invalid backreference number",
REG_EBRACK, "REG_EBRACK", "brackets ([ ]) not balanced",
REG_EPAREN, "REG_EPAREN", "parentheses not balanced",
REG_EBRACE, "REG_EBRACE", "braces not balanced",
REG_BADBR, "REG_BADBR", "invalid repetition count(s)",
REG_ERANGE, "REG_ERANGE", "invalid character range",
REG_ESPACE, "REG_ESPACE", "out of memory",
REG_BADRPT, "REG_BADRPT", "repetition-operator operand invalid",
REG_EMPTY, "REG_EMPTY", "empty (sub)expression",
REG_ASSERT, "REG_ASSERT", "\"can't happen\" -- you found a bug",
REG_INVARG, "REG_INVARG", "invalid argument to regex routine",
0, "", "*** unknown regexp error code ***",
};
/*
- regerror - the interface to error numbers
= extern size_t regerror(int, const regex_t *, char *, size_t);
*/
/* ARGSUSED */
size_t
regerror(errcode, preg, errbuf, errbuf_size)
int errcode;
const regex_t *preg;
char *errbuf;
size_t errbuf_size;
{
register struct rerr *r;
register size_t len;
register int target = errcode &~ REG_ITOA;
register char *s;
char convbuf[50];
if (errcode == REG_ATOI)
s = regatoi(preg, convbuf);
else {
for (r = rerrs; r->code != 0; r++)
if (r->code == target)
break;
if (errcode&REG_ITOA) {
if (r->code != 0)
(void) strcpy(convbuf, r->name);
else
sprintf(convbuf, "REG_0x%x", target);
assert(strlen(convbuf) < sizeof(convbuf));
s = convbuf;
} else
s = r->explain;
}
len = strlen(s) + 1;
if (errbuf_size > 0) {
if (errbuf_size > len)
(void) strcpy(errbuf, s);
else {
(void) strncpy(errbuf, s, errbuf_size-1);
errbuf[errbuf_size-1] = '\0';
}
}
return(len);
}
/*
- regatoi - internal routine to implement REG_ATOI
== static char *regatoi(const regex_t *preg, char *localbuf);
*/
static char *
regatoi(preg, localbuf)
const regex_t *preg;
char *localbuf;
{
register struct rerr *r;
register size_t siz;
register char *p;
for (r = rerrs; r->code != 0; r++)
if (strcmp(r->name, preg->re_endp) == 0)
break;
if (r->code == 0)
return("0");
sprintf(localbuf, "%d", r->code);
return(localbuf);
}

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/*-
* 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. 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
*/
/*
* First, the stuff that ends up in the outside-world include file
= typedef off_t regoff_t;
= typedef struct {
= int re_magic;
= size_t re_nsub; // number of parenthesized subexpressions
= const char *re_endp; // end pointer for REG_PEND
= struct re_guts *re_g; // none of your business :-)
= } regex_t;
= typedef struct {
= regoff_t rm_so; // start of match
= regoff_t rm_eo; // end of match
= } regmatch_t;
*/
/*
* internals of regex_t
*/
#define MAGIC1 ((('r'^0200)<<8) | 'e')
/*
* 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.
*/
typedef unsigned long sop; /* strip operator */
typedef long sopno;
#define OPRMASK 0xf8000000
#define OPDMASK 0x07ffffff
#define OPSHIFT ((unsigned)27)
#define OP(n) ((n)&OPRMASK)
#define OPND(n) ((n)&OPDMASK)
#define SOP(op, opnd) ((op)|(opnd))
/* operators meaning operand */
/* (back, fwd are offsets) */
#define OEND (1<<OPSHIFT) /* endmarker - */
#define OCHAR (2<<OPSHIFT) /* character unsigned char */
#define OBOL (3<<OPSHIFT) /* left anchor - */
#define OEOL (4<<OPSHIFT) /* right anchor - */
#define OANY (5<<OPSHIFT) /* . - */
#define OANYOF (6<<OPSHIFT) /* [...] set number */
#define OBACK_ (7<<OPSHIFT) /* begin \d paren number */
#define O_BACK (8<<OPSHIFT) /* end \d paren number */
#define OPLUS_ (9<<OPSHIFT) /* + prefix fwd to suffix */
#define O_PLUS (10<<OPSHIFT) /* + suffix back to prefix */
#define OQUEST_ (11<<OPSHIFT) /* ? prefix fwd to suffix */
#define O_QUEST (12<<OPSHIFT) /* ? suffix back to prefix */
#define OLPAREN (13<<OPSHIFT) /* ( fwd to ) */
#define ORPAREN (14<<OPSHIFT) /* ) back to ( */
#define OCH_ (15<<OPSHIFT) /* begin choice fwd to OOR2 */
#define OOR1 (16<<OPSHIFT) /* | pt. 1 back to OOR1 or OCH_ */
#define OOR2 (17<<OPSHIFT) /* | pt. 2 fwd to OOR2 or O_CH */
#define O_CH (18<<OPSHIFT) /* end choice back to OOR1 */
#define OBOW (19<<OPSHIFT) /* begin word - */
#define OEOW (20<<OPSHIFT) /* end word - */
/*
* 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.
*/
typedef struct {
uch *ptr; /* -> uch [csetsize] */
uch mask; /* bit within array */
uch hash; /* hash code */
size_t smultis;
char *multis; /* -> char[smulti] ab\0cd\0ef\0\0 */
} cset;
/* note that CHadd and CHsub are unsafe, and CHIN doesn't yield 0/1 */
#define CHadd(cs, c) ((cs)->ptr[(uch)(c)] |= (cs)->mask, (cs)->hash += (c))
#define CHsub(cs, c) ((cs)->ptr[(uch)(c)] &= ~(cs)->mask, (cs)->hash -= (c))
#define CHIN(cs, c) ((cs)->ptr[(uch)(c)] & (cs)->mask)
#define MCadd(p, cs, cp) mcadd(p, cs, cp) /* regcomp() internal fns */
#define MCsub(p, cs, cp) mcsub(p, cs, cp)
#define MCin(p, cs, cp) mcin(p, cs, cp)
/* stuff for character categories */
typedef unsigned char cat_t;
/*
* main compiled-expression structure
*/
struct re_guts {
int magic;
# define MAGIC2 ((('R'^0200)<<8)|'E')
sop *strip; /* malloced area for strip */
int csetsize; /* number of bits in a cset vector */
int ncsets; /* number of csets in use */
cset *sets; /* -> cset [ncsets] */
uch *setbits; /* -> uch[csetsize][ncsets/CHAR_BIT] */
int cflags; /* copy of regcomp() cflags argument */
sopno nstates; /* = number of sops */
sopno firststate; /* the initial OEND (normally 0) */
sopno laststate; /* the final OEND */
int iflags; /* internal flags */
# define USEBOL 01 /* used ^ */
# define USEEOL 02 /* used $ */
# define BAD 04 /* something wrong */
int nbol; /* number of ^ used */
int neol; /* number of $ used */
int ncategories; /* how many character categories */
cat_t *categories; /* ->catspace[-CHAR_MIN] */
char *must; /* match must contain this string */
int mlen; /* length of must */
size_t nsub; /* copy of re_nsub */
int backrefs; /* does it use back references? */
sopno nplus; /* how deep does it nest +s? */
/* catspace must be last */
cat_t catspace[1]; /* actually [NC] */
};
/* misc utilities */
#define OUT (CHAR_MAX+1) /* a non-character value */
#define ISWORD(c) (isalnum(c) || (c) == '_')

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/*-
* 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. 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.
*
* @(#)regexec.c 8.3 (Berkeley) 3/20/94
*/
#if defined(LIBC_SCCS) && !defined(lint)
static char sccsid[] = "@(#)regexec.c 8.3 (Berkeley) 3/20/94";
#endif /* LIBC_SCCS and not lint */
/*
* the outer shell of regexec()
*
* This file includes engine.c *twice*, after muchos fiddling with the
* macros that code uses. This lets the same code operate on two different
* representations for state sets.
*/
#include <sys/types.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <limits.h>
#include <ctype.h>
#include <regex.h>
#include "utils.h"
#include "regex2.h"
static int nope = 0; /* for use in asserts; shuts lint up */
/* macros for manipulating states, small version */
#define states long
#define states1 states /* for later use in regexec() decision */
#define CLEAR(v) ((v) = 0)
#define SET0(v, n) ((v) &= ~(1 << (n)))
#define SET1(v, n) ((v) |= 1 << (n))
#define ISSET(v, n) ((v) & (1 << (n)))
#define ASSIGN(d, s) ((d) = (s))
#define EQ(a, b) ((a) == (b))
#define STATEVARS int dummy /* dummy version */
#define STATESETUP(m, n) /* nothing */
#define STATETEARDOWN(m) /* nothing */
#define SETUP(v) ((v) = 0)
#define onestate int
#define INIT(o, n) ((o) = (unsigned)1 << (n))
#define INC(o) ((o) <<= 1)
#define ISSTATEIN(v, o) ((v) & (o))
/* some abbreviations; note that some of these know variable names! */
/* do "if I'm here, I can also be there" etc without branches */
#define FWD(dst, src, n) ((dst) |= ((unsigned)(src)&(here)) << (n))
#define BACK(dst, src, n) ((dst) |= ((unsigned)(src)&(here)) >> (n))
#define ISSETBACK(v, n) ((v) & ((unsigned)here >> (n)))
/* function names */
#define SNAMES /* engine.c looks after details */
#include "engine.c"
/* now undo things */
#undef states
#undef CLEAR
#undef SET0
#undef SET1
#undef ISSET
#undef ASSIGN
#undef EQ
#undef STATEVARS
#undef STATESETUP
#undef STATETEARDOWN
#undef SETUP
#undef onestate
#undef INIT
#undef INC
#undef ISSTATEIN
#undef FWD
#undef BACK
#undef ISSETBACK
#undef SNAMES
/* macros for manipulating states, large version */
#define states char *
#define CLEAR(v) memset(v, 0, m->g->nstates)
#define SET0(v, n) ((v)[n] = 0)
#define SET1(v, n) ((v)[n] = 1)
#define ISSET(v, n) ((v)[n])
#define ASSIGN(d, s) memcpy(d, s, m->g->nstates)
#define EQ(a, b) (memcmp(a, b, m->g->nstates) == 0)
#define STATEVARS int vn; char *space
#define STATESETUP(m, nv) { (m)->space = malloc((nv)*(m)->g->nstates); \
if ((m)->space == NULL) return(REG_ESPACE); \
(m)->vn = 0; }
#define STATETEARDOWN(m) { free((m)->space); }
#define SETUP(v) ((v) = &m->space[m->vn++ * m->g->nstates])
#define onestate int
#define INIT(o, n) ((o) = (n))
#define INC(o) ((o)++)
#define ISSTATEIN(v, o) ((v)[o])
/* some abbreviations; note that some of these know variable names! */
/* do "if I'm here, I can also be there" etc without branches */
#define FWD(dst, src, n) ((dst)[here+(n)] |= (src)[here])
#define BACK(dst, src, n) ((dst)[here-(n)] |= (src)[here])
#define ISSETBACK(v, n) ((v)[here - (n)])
/* function names */
#define LNAMES /* flag */
#include "engine.c"
/*
- regexec - interface for matching
= extern int regexec(const regex_t *, const char *, size_t, \
= regmatch_t [], int);
= #define REG_NOTBOL 00001
= #define REG_NOTEOL 00002
= #define REG_STARTEND 00004
= #define REG_TRACE 00400 // tracing of execution
= #define REG_LARGE 01000 // force large representation
= #define REG_BACKR 02000 // force use of backref code
*
* We put this here so we can exploit knowledge of the state representation
* when choosing which matcher to call. Also, by this point the matchers
* have been prototyped.
*/
int /* 0 success, REG_NOMATCH failure */
regexec(preg, string, nmatch, pmatch, eflags)
const regex_t *preg;
const char *string;
size_t nmatch;
regmatch_t pmatch[];
int eflags;
{
register struct re_guts *g = preg->re_g;
#ifdef REDEBUG
# define GOODFLAGS(f) (f)
#else
# define GOODFLAGS(f) ((f)&(REG_NOTBOL|REG_NOTEOL|REG_STARTEND))
#endif
if (preg->re_magic != MAGIC1 || g->magic != MAGIC2)
return(REG_BADPAT);
assert(!(g->iflags&BAD));
if (g->iflags&BAD) /* backstop for no-debug case */
return(REG_BADPAT);
eflags = GOODFLAGS(eflags);
if (g->nstates <= CHAR_BIT*sizeof(states1) && !(eflags&REG_LARGE))
return(smatcher(g, (char *)string, nmatch, pmatch, eflags));
else
return(lmatcher(g, (char *)string, nmatch, pmatch, eflags));
}

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/*-
* 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. 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.
*
* @(#)regfree.c 8.3 (Berkeley) 3/20/94
*/
#if defined(LIBC_SCCS) && !defined(lint)
static char sccsid[] = "@(#)regfree.c 8.3 (Berkeley) 3/20/94";
#endif /* LIBC_SCCS and not lint */
#include <sys/types.h>
#include <stdio.h>
#include <stdlib.h>
#include <regex.h>
#include "utils.h"
#include "regex2.h"
/*
- regfree - free everything
= extern void regfree(regex_t *);
*/
void
regfree(preg)
regex_t *preg;
{
register struct re_guts *g;
if (preg->re_magic != MAGIC1) /* oops */
return; /* nice to complain, but hard */
g = preg->re_g;
if (g == NULL || g->magic != MAGIC2) /* oops again */
return;
preg->re_magic = 0; /* mark it invalid */
g->magic = 0; /* mark it invalid */
if (g->strip != NULL)
free((char *)g->strip);
if (g->sets != NULL)
free((char *)g->sets);
if (g->setbits != NULL)
free((char *)g->setbits);
if (g->must != NULL)
free(g->must);
free((char *)g);
}

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/*-
* 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. 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.
*
* @(#)utils.h 8.3 (Berkeley) 3/20/94
*/
/* utility definitions */
#define DUPMAX _POSIX2_RE_DUP_MAX /* xxx is this right? */
#define INFINITY (DUPMAX + 1)
#define NC (CHAR_MAX - CHAR_MIN + 1)
typedef unsigned char uch;
/* switch off assertions (if not already off) if no REDEBUG */
#ifndef REDEBUG
#ifndef NDEBUG
#define NDEBUG /* no assertions please */
#endif
#endif
#include <assert.h>
/* for old systems with bcopy() but no memmove() */
#ifdef USEBCOPY
#define memmove(d, s, c) bcopy(s, d, c)
#endif