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Back out the botched attempt to update to gnu grep 2.3 (lots of history

Browse Source 
was lost).  Restore original version to try and avoid breaking the build
while David O'brien does a proper set of imports and merges.

Requested by:	obrien
This commit is contained in:
peter 1999-11-20 09:40:28 +00:00
parent ed03d56d4b
commit 74515e9b09
21 changed files with 7886 additions and 230 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

45
gnu/usr.bin/grep/Makefile
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@ -1,15 +1,15 @@
# $FreeBSD$
GREP_LIBZ=YES
MAINTAINER= wosch
GREPDIR=${.CURDIR}/../../../contrib/grep
.PATH: ${GREPDIR}/src ${GREPDIR}/doc
GREP_LIBZ= YES
GREP_FTS= YES
PROG= grep
SRCS= dfa.c getopt.c getopt1.c grep.c kwset.c obstack.c \
savedir.c search.c stpcpy.c
CFLAGS+=-I${.CURDIR} -DHAVE_CONFIG_H
SRCS= dfa.c grep.c getopt.c kwset.c obstack.c search.c
CFLAGS+=-DGREP -DHAVE_STRING_H=1 -DHAVE_SYS_PARAM_H=1 -DHAVE_UNISTD_H=1 \
-DHAVE_GETPAGESIZE=1 -DHAVE_MEMCHR=1 -DHAVE_STRERROR=1 \
-DHAVE_VALLOC=1 -DHAVE_WORKING_MMAP=1
LINKS+= ${BINDIR}/grep ${BINDIR}/egrep \
${BINDIR}/grep ${BINDIR}/fgrep
@ -21,34 +21,17 @@ LDADD+= -lgnuregex
.if defined(GREP_LIBZ) && !empty(GREP_LIBZ)
LDADD+= -lz
DPADD+= ${LIBZ}
CFLAGS+=-DHAVE_LIBZ=1
CFLAGS+= -DHAVE_LIBZ=1
LINKS+= ${BINDIR}/grep ${BINDIR}/zgrep \
${BINDIR}/grep ${BINDIR}/zegrep \
${BINDIR}/grep ${BINDIR}/zfgrep
MLINKS+=grep.1 zgrep.1 grep.1 zegrep.1 grep.1 zfgrep.1
${BINDIR}/grep ${BINDIR}/zfgrep
MLINKS+= grep.1 zgrep.1 grep.1 zegrep.1 grep.1 zfgrep.1
.endif
.if defined(GREP_FTS) && !empty(GREP_FTS)
CFLAGS+= -DHAVE_FTS=1
.endif
SUBDIR+=doc
check: all
@failed=0; total=0; \
for tst in ${TESTS}; do \
total=$$(($$total+1)); \
if GREP=${.OBJDIR}/${PROG} srcdir=${GREPDIR}/tests \
${GREPDIR}/tests/$$tst; then \
echo "PASS: $$tst"; \
else \
failed=$$(($$failed+1)); \
echo "FAIL: $$tst"; \
fi; \
done; \
if [ "$$failed" -eq 0 ]; then \
echo "All $$total tests passed"; \
else \
echo "$$failed of $$total tests failed"; \
fi
TESTS= warning.sh khadafy.sh spencer1.sh bre.sh ere.sh \
status.sh empty.sh options.sh
sh ${.CURDIR}/tests/check.sh ${.CURDIR}/tests
.include <bsd.prog.mk>

15
gnu/usr.bin/grep/PROJECTS Normal file
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@ -0,0 +1,15 @@
Write Texinfo documentation for grep. The manual page would be a good
place to start, but Info documents are also supposed to contain a
tutorial and examples.
Fix the DFA matcher to never use exponential space. (Fortunately, these
cases are rare.)
Improve the performance of the regex backtracking matcher. This matcher
is agonizingly slow, and is responsible for grep sometimes being slower
than Unix grep when backreferences are used.
Provide support for the Posix [= =] and [. .] constructs. This is
difficult because it requires locale-dependent details of the character
set and collating sequence, but Posix does not standardize any method
for accessing this information!

28
gnu/usr.bin/grep/README Normal file
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@ -0,0 +1,28 @@
This is GNU grep 2.0, the "fastest grep in the west" (we hope). All
bugs reported in previous releases have been fixed. Many exciting new
bugs have probably been introduced in this major revision.
GNU grep is provided "as is" with no warranty. The exact terms
under which you may use and (re)distribute this program are detailed
in the GNU General Public License, in the file COPYING.
GNU grep is based on a fast lazy-state deterministic matcher (about
twice as fast as stock Unix egrep) hybridized with a Boyer-Moore-Gosper
search for a fixed string that eliminates impossible text from being
considered by the full regexp matcher without necessarily having to
look at every character. The result is typically many times faster
than Unix grep or egrep. (Regular expressions containing backreferencing
will run more slowly, however.)
See the file AUTHORS for a list of authors and other contributors.
See the file INSTALL for compilation and installation instructions.
See the file MANIFEST for a list of files in this distribution.
See the file NEWS for a description of major changes in this release.
See the file PROJECTS if you want to be mentioned in AUTHORS.
Send bug reports to bug-gnu-utils@prep.ai.mit.edu. Be sure to
include the word "grep" in your Subject: header field.

188
gnu/usr.bin/grep/config.h
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@ -1,188 +0,0 @@
/* $FreeBSD$ */
/* config.h. Generated automatically by configure. */
/* config.hin. Generated automatically from configure.in by autoheader. */
/* Define if using alloca.c. */
/* #undef C_ALLOCA */
/* Define if the closedir function returns void instead of int. */
/* #undef CLOSEDIR_VOID */
/* Define to empty if the keyword does not work. */
/* #undef const */
/* Define to one of _getb67, GETB67, getb67 for Cray-2 and Cray-YMP systems.
This function is required for alloca.c support on those systems. */
/* #undef CRAY_STACKSEG_END */
/* Define if you have alloca, as a function or macro. */
#define HAVE_ALLOCA 1
/* Define if you have <alloca.h> and it should be used (not on Ultrix). */
/* #undef HAVE_ALLOCA_H */
/* Define if you have a working `mmap' system call. */
#define HAVE_MMAP 1
/* Define as __inline if that's what the C compiler calls it. */
/* #undef inline */
/* Define to `long' if <sys/types.h> doesn't define. */
/* #undef off_t */
/* Define to `unsigned' if <sys/types.h> doesn't define. */
/* #undef size_t */
/* If using the C implementation of alloca, define if you know the
direction of stack growth for your system; otherwise it will be
automatically deduced at run-time.
STACK_DIRECTION > 0 => grows toward higher addresses
STACK_DIRECTION < 0 => grows toward lower addresses
STACK_DIRECTION = 0 => direction of growth unknown
*/
/* #undef STACK_DIRECTION */
/* Define if the `S_IS*' macros in <sys/stat.h> do not work properly. */
/* #undef STAT_MACROS_BROKEN */
/* Define if you have the ANSI C header files. */
#define STDC_HEADERS 1
/* Define to use grep's error-checking malloc in the kwset routines. */
#define GREP 1
/* Package name. */
#define PACKAGE "grep"
/* Version number. */
#define VERSION "2.3"
/* Hack for Visual C++ suggested by irox. */
/* #undef alloca */
/* #undef HAVE_STPCPY */
/* #undef ENABLE_NLS */
/* #undef HAVE_CATGETS */
/* #undef HAVE_GETTEXT */
#define HAVE_LC_MESSAGES 1
/*
* DOS specific
*/
/* #undef HAVE_DOS_FILE_NAMES */
/* Define if you have the __argz_count function. */
/* #undef HAVE___ARGZ_COUNT */
/* Define if you have the __argz_next function. */
/* #undef HAVE___ARGZ_NEXT */
/* Define if you have the __argz_stringify function. */
/* #undef HAVE___ARGZ_STRINGIFY */
/* Define if you have the btowc function. */
/* #undef HAVE_BTOWC */
/* Define if you have the dcgettext function. */
/* #undef HAVE_DCGETTEXT */
/* Define if you have the getcwd function. */
#define HAVE_GETCWD 1
/* Define if you have the getpagesize function. */
#define HAVE_GETPAGESIZE 1
/* Define if you have the isascii function. */
#define HAVE_ISASCII 1
/* Define if you have the memchr function. */
#define HAVE_MEMCHR 1
/* Define if you have the munmap function. */
#define HAVE_MUNMAP 1
/* Define if you have the putenv function. */
#define HAVE_PUTENV 1
/* Define if you have the setenv function. */
#define HAVE_SETENV 1
/* Define if you have the setlocale function. */
#define HAVE_SETLOCALE 1
/* Define if you have the setmode function. */
#define HAVE_SETMODE 1
/* Define if you have the stpcpy function. */
/* #undef HAVE_STPCPY */
/* Define if you have the strcasecmp function. */
#define HAVE_STRCASECMP 1
/* Define if you have the strchr function. */
#define HAVE_STRCHR 1
/* Define if you have the strdup function. */
#define HAVE_STRDUP 1
/* Define if you have the strerror function. */
#define HAVE_STRERROR 1
/* Define if you have the <argz.h> header file. */
/* #undef HAVE_ARGZ_H */
/* Define if you have the <dirent.h> header file. */
#define HAVE_DIRENT_H 1
/* Define if you have the <libintl.h> header file. */
/* #undef HAVE_LIBINTL_H */
/* Define if you have the <limits.h> header file. */
#define HAVE_LIMITS_H 1
/* Define if you have the <locale.h> header file. */
#define HAVE_LOCALE_H 1
/* Define if you have the <malloc.h> header file. */
/* #undef HAVE_MALLOC_H */
/* Define if you have the <memory.h> header file. */
#define HAVE_MEMORY_H 1
/* Define if you have the <ndir.h> header file. */
/* #undef HAVE_NDIR_H */
/* Define if you have the <nl_types.h> header file. */
#define HAVE_NL_TYPES_H 1
/* Define if you have the <stdlib.h> header file. */
#define HAVE_STDLIB_H 1
/* Define if you have the <string.h> header file. */
#define HAVE_STRING_H 1
/* Define if you have the <sys/dir.h> header file. */
/* #undef HAVE_SYS_DIR_H */
/* Define if you have the <sys/ndir.h> header file. */
/* #undef HAVE_SYS_NDIR_H */
/* Define if you have the <sys/param.h> header file. */
#define HAVE_SYS_PARAM_H 1
/* Define if you have the <unistd.h> header file. */
#define HAVE_UNISTD_H 1
/* Define if you have the <wchar.h> header file. */
/* #undef HAVE_WCHAR_H */
/* Define if you have the <wctype.h> header file. */
/* #undef HAVE_WCTYPE_H */
/* Define if you have the i library (-li). */
/* #undef HAVE_LIBI */

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gnu/usr.bin/grep/dfa.c Normal file
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gnu/usr.bin/grep/dfa.h Normal file
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/* dfa.h - declarations for GNU deterministic regexp compiler
Copyright (C) 1988 Free Software Foundation, Inc.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
/* Written June, 1988 by Mike Haertel */
/* FIXME:
2. We should not export so much of the DFA internals.
In addition to clobbering modularity, we eat up valuable
name space. */
/* Number of bits in an unsigned char. */
#define CHARBITS 8
/* First integer value that is greater than any character code. */
#define NOTCHAR (1 << CHARBITS)
/* INTBITS need not be exact, just a lower bound. */
#define INTBITS (CHARBITS * sizeof (int))
/* Number of ints required to hold a bit for every character. */
#define CHARCLASS_INTS ((NOTCHAR + INTBITS - 1) / INTBITS)
/* Sets of unsigned characters are stored as bit vectors in arrays of ints. */
typedef int charclass[CHARCLASS_INTS];
/* The regexp is parsed into an array of tokens in postfix form. Some tokens
are operators and others are terminal symbols. Most (but not all) of these
codes are returned by the lexical analyzer. */
typedef enum
{
END = -1, /* END is a terminal symbol that matches the
end of input; any value of END or less in
the parse tree is such a symbol. Accepting
states of the DFA are those that would have
a transition on END. */
/* Ordinary character values are terminal symbols that match themselves. */
EMPTY = NOTCHAR, /* EMPTY is a terminal symbol that matches
the empty string. */
BACKREF, /* BACKREF is generated by \<digit>; it
it not completely handled. If the scanner
detects a transition on backref, it returns
a kind of "semi-success" indicating that
the match will have to be verified with
a backtracking matcher. */
BEGLINE, /* BEGLINE is a terminal symbol that matches
the empty string if it is at the beginning
of a line. */
ENDLINE, /* ENDLINE is a terminal symbol that matches
the empty string if it is at the end of
a line. */
BEGWORD, /* BEGWORD is a terminal symbol that matches
the empty string if it is at the beginning
of a word. */
ENDWORD, /* ENDWORD is a terminal symbol that matches
the empty string if it is at the end of
a word. */
LIMWORD, /* LIMWORD is a terminal symbol that matches
the empty string if it is at the beginning
or the end of a word. */
NOTLIMWORD, /* NOTLIMWORD is a terminal symbol that
matches the empty string if it is not at
the beginning or end of a word. */
QMARK, /* QMARK is an operator of one argument that
matches zero or one occurences of its
argument. */
STAR, /* STAR is an operator of one argument that
matches the Kleene closure (zero or more
occurrences) of its argument. */
PLUS, /* PLUS is an operator of one argument that
matches the positive closure (one or more
occurrences) of its argument. */
REPMN, /* REPMN is a lexical token corresponding
to the {m,n} construct. REPMN never
appears in the compiled token vector. */
CAT, /* CAT is an operator of two arguments that
matches the concatenation of its
arguments. CAT is never returned by the
lexical analyzer. */
OR, /* OR is an operator of two arguments that
matches either of its arguments. */
ORTOP, /* OR at the toplevel in the parse tree.
This is used for a boyer-moore heuristic. */
LPAREN, /* LPAREN never appears in the parse tree,
it is only a lexeme. */
RPAREN, /* RPAREN never appears in the parse tree. */
CSET /* CSET and (and any value greater) is a
terminal symbol that matches any of a
class of characters. */
} token;
/* Sets are stored in an array in the compiled dfa; the index of the
array corresponding to a given set token is given by SET_INDEX(t). */
#define SET_INDEX(t) ((t) - CSET)
/* Sometimes characters can only be matched depending on the surrounding
context. Such context decisions depend on what the previous character
was, and the value of the current (lookahead) character. Context
dependent constraints are encoded as 8 bit integers. Each bit that
is set indicates that the constraint succeeds in the corresponding
context.
bit 7 - previous and current are newlines
bit 6 - previous was newline, current isn't
bit 5 - previous wasn't newline, current is
bit 4 - neither previous nor current is a newline
bit 3 - previous and current are word-constituents
bit 2 - previous was word-constituent, current isn't
bit 1 - previous wasn't word-constituent, current is
bit 0 - neither previous nor current is word-constituent
Word-constituent characters are those that satisfy isalnum().
The macro SUCCEEDS_IN_CONTEXT determines whether a a given constraint
succeeds in a particular context. Prevn is true if the previous character
was a newline, currn is true if the lookahead character is a newline.
Prevl and currl similarly depend upon whether the previous and current
characters are word-constituent letters. */
#define MATCHES_NEWLINE_CONTEXT(constraint, prevn, currn) \
((constraint) & 1 << (((prevn) ? 2 : 0) + ((currn) ? 1 : 0) + 4))
#define MATCHES_LETTER_CONTEXT(constraint, prevl, currl) \
((constraint) & 1 << (((prevl) ? 2 : 0) + ((currl) ? 1 : 0)))
#define SUCCEEDS_IN_CONTEXT(constraint, prevn, currn, prevl, currl) \
(MATCHES_NEWLINE_CONTEXT(constraint, prevn, currn) \
&& MATCHES_LETTER_CONTEXT(constraint, prevl, currl))
/* The following macros give information about what a constraint depends on. */
#define PREV_NEWLINE_DEPENDENT(constraint) \
(((constraint) & 0xc0) >> 2 != ((constraint) & 0x30))
#define PREV_LETTER_DEPENDENT(constraint) \
(((constraint) & 0x0c) >> 2 != ((constraint) & 0x03))
/* Tokens that match the empty string subject to some constraint actually
work by applying that constraint to determine what may follow them,
taking into account what has gone before. The following values are
the constraints corresponding to the special tokens previously defined. */
#define NO_CONSTRAINT 0xff
#define BEGLINE_CONSTRAINT 0xcf
#define ENDLINE_CONSTRAINT 0xaf
#define BEGWORD_CONSTRAINT 0xf2
#define ENDWORD_CONSTRAINT 0xf4
#define LIMWORD_CONSTRAINT 0xf6
#define NOTLIMWORD_CONSTRAINT 0xf9
/* States of the recognizer correspond to sets of positions in the parse
tree, together with the constraints under which they may be matched.
So a position is encoded as an index into the parse tree together with
a constraint. */
typedef struct
{
unsigned index; /* Index into the parse array. */
unsigned constraint; /* Constraint for matching this position. */
} position;
/* Sets of positions are stored as arrays. */
typedef struct
{
position *elems; /* Elements of this position set. */
int nelem; /* Number of elements in this set. */
} position_set;
/* A state of the dfa consists of a set of positions, some flags,
and the token value of the lowest-numbered position of the state that
contains an END token. */
typedef struct
{
int hash; /* Hash of the positions of this state. */
position_set elems; /* Positions this state could match. */
char newline; /* True if previous state matched newline. */
char letter; /* True if previous state matched a letter. */
char backref; /* True if this state matches a \<digit>. */
unsigned char constraint; /* Constraint for this state to accept. */
int first_end; /* Token value of the first END in elems. */
} dfa_state;
/* Element of a list of strings, at least one of which is known to
appear in any R.E. matching the DFA. */
struct dfamust
{
int exact;
char *must;
struct dfamust *next;
};
/* A compiled regular expression. */
struct dfa
{
/* Stuff built by the scanner. */
charclass *charclasses; /* Array of character sets for CSET tokens. */
int cindex; /* Index for adding new charclasses. */
int calloc; /* Number of charclasses currently allocated. */
/* Stuff built by the parser. */
token *tokens; /* Postfix parse array. */
int tindex; /* Index for adding new tokens. */
int talloc; /* Number of tokens currently allocated. */
int depth; /* Depth required of an evaluation stack
used for depth-first traversal of the
parse tree. */
int nleaves; /* Number of leaves on the parse tree. */
int nregexps; /* Count of parallel regexps being built
with dfaparse(). */
/* Stuff owned by the state builder. */
dfa_state *states; /* States of the dfa. */
int sindex; /* Index for adding new states. */
int salloc; /* Number of states currently allocated. */
/* Stuff built by the structure analyzer. */
position_set *follows; /* Array of follow sets, indexed by position
index. The follow of a position is the set
of positions containing characters that
could conceivably follow a character
matching the given position in a string
matching the regexp. Allocated to the
maximum possible position index. */
int searchflag; /* True if we are supposed to build a searching
as opposed to an exact matcher. A searching
matcher finds the first and shortest string
matching a regexp anywhere in the buffer,
whereas an exact matcher finds the longest
string matching, but anchored to the
beginning of the buffer. */
/* Stuff owned by the executor. */
int tralloc; /* Number of transition tables that have
slots so far. */
int trcount; /* Number of transition tables that have
actually been built. */
int **trans; /* Transition tables for states that can
never accept. If the transitions for a
state have not yet been computed, or the
state could possibly accept, its entry in
this table is NULL. */
int **realtrans; /* Trans always points to realtrans + 1; this
is so trans[-1] can contain NULL. */
int **fails; /* Transition tables after failing to accept
on a state that potentially could do so. */
int *success; /* Table of acceptance conditions used in
dfaexec and computed in build_state. */
int *newlines; /* Transitions on newlines. The entry for a
newline in any transition table is always
-1 so we can count lines without wasting
too many cycles. The transition for a
newline is stored separately and handled
as a special case. Newline is also used
as a sentinel at the end of the buffer. */
struct dfamust *musts; /* List of strings, at least one of which
is known to appear in any r.e. matching
the dfa. */
};
/* Some macros for user access to dfa internals. */
/* ACCEPTING returns true if s could possibly be an accepting state of r. */
#define ACCEPTING(s, r) ((r).states[s].constraint)
/* ACCEPTS_IN_CONTEXT returns true if the given state accepts in the
specified context. */
#define ACCEPTS_IN_CONTEXT(prevn, currn, prevl, currl, state, dfa) \
SUCCEEDS_IN_CONTEXT((dfa).states[state].constraint, \
prevn, currn, prevl, currl)
/* FIRST_MATCHING_REGEXP returns the index number of the first of parallel
regexps that a given state could accept. Parallel regexps are numbered
starting at 1. */
#define FIRST_MATCHING_REGEXP(state, dfa) (-(dfa).states[state].first_end)
/* Entry points. */
#if __STDC__
/* dfasyntax() takes two arguments; the first sets the syntax bits described
earlier in this file, and the second sets the case-folding flag. */
extern void dfasyntax(int, int);
/* Compile the given string of the given length into the given struct dfa.
Final argument is a flag specifying whether to build a searching or an
exact matcher. */
extern void dfacomp(char *, size_t, struct dfa *, int);
/* Execute the given struct dfa on the buffer of characters. The
first char * points to the beginning, and the second points to the
first character after the end of the buffer, which must be a writable
place so a sentinel end-of-buffer marker can be stored there. The
second-to-last argument is a flag telling whether to allow newlines to
be part of a string matching the regexp. The next-to-last argument,
if non-NULL, points to a place to increment every time we see a
newline. The final argument, if non-NULL, points to a flag that will
be set if further examination by a backtracking matcher is needed in
order to verify backreferencing; otherwise the flag will be cleared.
Returns NULL if no match is found, or a pointer to the first
character after the first & shortest matching string in the buffer. */
extern char *dfaexec(struct dfa *, char *, char *, int, int *, int *);
/* Free the storage held by the components of a struct dfa. */
extern void dfafree(struct dfa *);
/* Entry points for people who know what they're doing. */
/* Initialize the components of a struct dfa. */
extern void dfainit(struct dfa *);
/* Incrementally parse a string of given length into a struct dfa. */
extern void dfaparse(char *, size_t, struct dfa *);
/* Analyze a parsed regexp; second argument tells whether to build a searching
or an exact matcher. */
extern void dfaanalyze(struct dfa *, int);
/* Compute, for each possible character, the transitions out of a given
state, storing them in an array of integers. */
extern void dfastate(int, struct dfa *, int []);
/* Error handling. */
/* dfaerror() is called by the regexp routines whenever an error occurs. It
takes a single argument, a NUL-terminated string describing the error.
The default dfaerror() prints the error message to stderr and exits.
The user can provide a different dfafree() if so desired. */
extern void dfaerror(char *);
#else /* ! __STDC__ */
extern void dfasyntax(), dfacomp(), dfafree(), dfainit(), dfaparse();
extern void dfaanalyze(), dfastate(), dfaerror();
extern char *dfaexec();
#endif /* ! __STDC__ */

11
gnu/usr.bin/grep/doc/Makefile
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@ -1,11 +0,0 @@
# $FreeBSD$
GREPDIR=${.CURDIR}/../../../../contrib/grep
.PATH: ${GREPDIR}/doc
INFO= grep
INFOSECTION= "System Utilities"
MAKEINFOFLAGS+= -I ${GREPDIR}/doc
.include <bsd.info.mk>

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/* Getopt for GNU.
NOTE: getopt is now part of the C library, so if you don't know what
"Keep this file name-space clean" means, talk to roland@gnu.ai.mit.edu
before changing it!
Copyright (C) 1987, 88, 89, 90, 91, 92, 1993
Free Software Foundation, Inc.
This program is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by the
Free Software Foundation; either version 2, 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
/* NOTE!!! AIX requires this to be the first thing in the file.
Do not put ANYTHING before it! */
#if !defined (__GNUC__) && defined (_AIX)
#pragma alloca
#endif
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#ifdef __GNUC__
#define alloca __builtin_alloca
#else /* not __GNUC__ */
#if defined (HAVE_ALLOCA_H) || (defined(sparc) && (defined(sun) || (!defined(USG) && !defined(SVR4) && !defined(__svr4__))))
#include <alloca.h>
#else
#ifndef _AIX
char *alloca ();
#endif
#endif /* alloca.h */
#endif /* not __GNUC__ */
#if !__STDC__ && !defined(const) && IN_GCC
#define const
#endif
/* This tells Alpha OSF/1 not to define a getopt prototype in <stdio.h>. */
#ifndef _NO_PROTO
#define _NO_PROTO
#endif
#include <stdio.h>
/* Comment out all this code if we are using the GNU C Library, and are not
actually compiling the library itself. This code is part of the GNU C
Library, but also included in many other GNU distributions. Compiling
and linking in this code is a waste when using the GNU C library
(especially if it is a shared library). Rather than having every GNU
program understand `configure --with-gnu-libc' and omit the object files,
it is simpler to just do this in the source for each such file. */
#if defined (_LIBC) || !defined (__GNU_LIBRARY__)
/* This needs to come after some library #include
to get __GNU_LIBRARY__ defined. */
#ifdef __GNU_LIBRARY__
#undef alloca
/* Don't include stdlib.h for non-GNU C libraries because some of them
contain conflicting prototypes for getopt. */
#include <stdlib.h>
#else /* Not GNU C library. */
#define __alloca alloca
#endif /* GNU C library. */
/* If GETOPT_COMPAT is defined, `+' as well as `--' can introduce a
long-named option. Because this is not POSIX.2 compliant, it is
being phased out. */
/* #define GETOPT_COMPAT */
/* This version of `getopt' appears to the caller like standard Unix `getopt'
but it behaves differently for the user, since it allows the user
to intersperse the options with the other arguments.
As `getopt' works, it permutes the elements of ARGV so that,
when it is done, all the options precede everything else. Thus
all application programs are extended to handle flexible argument order.
Setting the environment variable POSIXLY_CORRECT disables permutation.
Then the behavior is completely standard.
GNU application programs can use a third alternative mode in which
they can distinguish the relative order of options and other arguments. */
#include "getopt.h"
/* For communication from `getopt' to the caller.
When `getopt' finds an option that takes an argument,
the argument value is returned here.
Also, when `ordering' is RETURN_IN_ORDER,
each non-option ARGV-element is returned here. */
char *optarg = 0;
/* Index in ARGV of the next element to be scanned.
This is used for communication to and from the caller
and for communication between successive calls to `getopt'.
On entry to `getopt', zero means this is the first call; initialize.
When `getopt' returns EOF, this is the index of the first of the
non-option elements that the caller should itself scan.
Otherwise, `optind' communicates from one call to the next
how much of ARGV has been scanned so far. */
/* XXX 1003.2 says this must be 1 before any call. */
int optind = 0;
/* The next char to be scanned in the option-element
in which the last option character we returned was found.
This allows us to pick up the scan where we left off.
If this is zero, or a null string, it means resume the scan
by advancing to the next ARGV-element. */
static char *nextchar;
/* Callers store zero here to inhibit the error message
for unrecognized options. */
int opterr = 1;
/* Set to an option character which was unrecognized.
This must be initialized on some systems to avoid linking in the
system's own getopt implementation. */
int optopt = '?';
/* Describe how to deal with options that follow non-option ARGV-elements.
If the caller did not specify anything,
the default is REQUIRE_ORDER if the environment variable
POSIXLY_CORRECT is defined, PERMUTE otherwise.
REQUIRE_ORDER means don't recognize them as options;
stop option processing when the first non-option is seen.
This is what Unix does.
This mode of operation is selected by either setting the environment
variable POSIXLY_CORRECT, or using `+' as the first character
of the list of option characters.
PERMUTE is the default. We permute the contents of ARGV as we scan,
so that eventually all the non-options are at the end. This allows options
to be given in any order, even with programs that were not written to
expect this.
RETURN_IN_ORDER is an option available to programs that were written
to expect options and other ARGV-elements in any order and that care about
the ordering of the two. We describe each non-option ARGV-element
as if it were the argument of an option with character code 1.
Using `-' as the first character of the list of option characters
selects this mode of operation.
The special argument `--' forces an end of option-scanning regardless
of the value of `ordering'. In the case of RETURN_IN_ORDER, only
`--' can cause `getopt' to return EOF with `optind' != ARGC. */
static enum
{
REQUIRE_ORDER, PERMUTE, RETURN_IN_ORDER
} ordering;
#ifdef __GNU_LIBRARY__
/* We want to avoid inclusion of string.h with non-GNU libraries
because there are many ways it can cause trouble.
On some systems, it contains special magic macros that don't work
in GCC. */
#include <string.h>
#define my_index strchr
#define my_bcopy(src, dst, n) memcpy ((dst), (src), (n))
#else
/* Avoid depending on library functions or files
whose names are inconsistent. */
char *getenv ();
static char *
my_index (str, chr)
const char *str;
int chr;
{
while (*str)
{
if (*str == chr)
return (char *) str;
str++;
}
return 0;
}
static void
my_bcopy (from, to, size)
const char *from;
char *to;
int size;
{
int i;
for (i = 0; i < size; i++)
to[i] = from[i];
}
#endif /* GNU C library. */
/* Handle permutation of arguments. */
/* Describe the part of ARGV that contains non-options that have
been skipped. `first_nonopt' is the index in ARGV of the first of them;
`last_nonopt' is the index after the last of them. */
static int first_nonopt;
static int last_nonopt;
/* Exchange two adjacent subsequences of ARGV.
One subsequence is elements [first_nonopt,last_nonopt)
which contains all the non-options that have been skipped so far.
The other is elements [last_nonopt,optind), which contains all
the options processed since those non-options were skipped.
`first_nonopt' and `last_nonopt' are relocated so that they describe
the new indices of the non-options in ARGV after they are moved. */
static void
exchange (argv)
char **argv;
{
int nonopts_size = (last_nonopt - first_nonopt) * sizeof (char *);
char **temp = (char **) __alloca (nonopts_size);
/* Interchange the two blocks of data in ARGV. */
my_bcopy ((char *) &argv[first_nonopt], (char *) temp, nonopts_size);
my_bcopy ((char *) &argv[last_nonopt], (char *) &argv[first_nonopt],
(optind - last_nonopt) * sizeof (char *));
my_bcopy ((char *) temp,
(char *) &argv[first_nonopt + optind - last_nonopt],
nonopts_size);
/* Update records for the slots the non-options now occupy. */
first_nonopt += (optind - last_nonopt);
last_nonopt = optind;
}
/* Scan elements of ARGV (whose length is ARGC) for option characters
given in OPTSTRING.
If an element of ARGV starts with '-', and is not exactly "-" or "--",
then it is an option element. The characters of this element
(aside from the initial '-') are option characters. If `getopt'
is called repeatedly, it returns successively each of the option characters
from each of the option elements.
If `getopt' finds another option character, it returns that character,
updating `optind' and `nextchar' so that the next call to `getopt' can
resume the scan with the following option character or ARGV-element.
If there are no more option characters, `getopt' returns `EOF'.
Then `optind' is the index in ARGV of the first ARGV-element
that is not an option. (The ARGV-elements have been permuted
so that those that are not options now come last.)
OPTSTRING is a string containing the legitimate option characters.
If an option character is seen that is not listed in OPTSTRING,
return '?' after printing an error message. If you set `opterr' to
zero, the error message is suppressed but we still return '?'.
If a char in OPTSTRING is followed by a colon, that means it wants an arg,
so the following text in the same ARGV-element, or the text of the following
ARGV-element, is returned in `optarg'. Two colons mean an option that
wants an optional arg; if there is text in the current ARGV-element,
it is returned in `optarg', otherwise `optarg' is set to zero.
If OPTSTRING starts with `-' or `+', it requests different methods of
handling the non-option ARGV-elements.
See the comments about RETURN_IN_ORDER and REQUIRE_ORDER, above.
Long-named options begin with `--' instead of `-'.
Their names may be abbreviated as long as the abbreviation is unique
or is an exact match for some defined option. If they have an
argument, it follows the option name in the same ARGV-element, separated
from the option name by a `=', or else the in next ARGV-element.
When `getopt' finds a long-named option, it returns 0 if that option's
`flag' field is nonzero, the value of the option's `val' field
if the `flag' field is zero.
The elements of ARGV aren't really const, because we permute them.
But we pretend they're const in the prototype to be compatible
with other systems.
LONGOPTS is a vector of `struct option' terminated by an
element containing a name which is zero.
LONGIND returns the index in LONGOPT of the long-named option found.
It is only valid when a long-named option has been found by the most
recent call.
If LONG_ONLY is nonzero, '-' as well as '--' can introduce
long-named options. */
int
_getopt_internal (argc, argv, optstring, longopts, longind, long_only)
int argc;
char *const *argv;
const char *optstring;
const struct option *longopts;
int *longind;
int long_only;
{
int option_index;
optarg = 0;
/* Initialize the internal data when the first call is made.
Start processing options with ARGV-element 1 (since ARGV-element 0
is the program name); the sequence of previously skipped
non-option ARGV-elements is empty. */
if (optind == 0)
{
first_nonopt = last_nonopt = optind = 1;
nextchar = NULL;
/* Determine how to handle the ordering of options and nonoptions. */
if (optstring[0] == '-')
{
ordering = RETURN_IN_ORDER;
++optstring;
}
else if (optstring[0] == '+')
{
ordering = REQUIRE_ORDER;
++optstring;
}
else if (getenv ("POSIXLY_CORRECT") != NULL)
ordering = REQUIRE_ORDER;
else
ordering = PERMUTE;
}
if (nextchar == NULL || *nextchar == '\0')
{
if (ordering == PERMUTE)
{
/* If we have just processed some options following some non-options,
exchange them so that the options come first. */
if (first_nonopt != last_nonopt && last_nonopt != optind)
exchange ((char **) argv);
else if (last_nonopt != optind)
first_nonopt = optind;
/* Now skip any additional non-options
and extend the range of non-options previously skipped. */
while (optind < argc
&& (argv[optind][0] != '-' || argv[optind][1] == '\0')
#ifdef GETOPT_COMPAT
&& (longopts == NULL
|| argv[optind][0] != '+' || argv[optind][1] == '\0')
#endif /* GETOPT_COMPAT */
)
optind++;
last_nonopt = optind;
}
/* Special ARGV-element `--' means premature end of options.
Skip it like a null option,
then exchange with previous non-options as if it were an option,
then skip everything else like a non-option. */
if (optind != argc && !strcmp (argv[optind], "--"))
{
optind++;
if (first_nonopt != last_nonopt && last_nonopt != optind)
exchange ((char **) argv);
else if (first_nonopt == last_nonopt)
first_nonopt = optind;
last_nonopt = argc;
optind = argc;
}
/* If we have done all the ARGV-elements, stop the scan
and back over any non-options that we skipped and permuted. */
if (optind == argc)
{
/* Set the next-arg-index to point at the non-options
that we previously skipped, so the caller will digest them. */
if (first_nonopt != last_nonopt)
optind = first_nonopt;
return EOF;
}
/* If we have come to a non-option and did not permute it,
either stop the scan or describe it to the caller and pass it by. */
if ((argv[optind][0] != '-' || argv[optind][1] == '\0')
#ifdef GETOPT_COMPAT
&& (longopts == NULL
|| argv[optind][0] != '+' || argv[optind][1] == '\0')
#endif /* GETOPT_COMPAT */
)
{
if (ordering == REQUIRE_ORDER)
return EOF;
optarg = argv[optind++];
return 1;
}
/* We have found another option-ARGV-element.
Start decoding its characters. */
nextchar = (argv[optind] + 1
+ (longopts != NULL && argv[optind][1] == '-'));
}
if (longopts != NULL
&& ((argv[optind][0] == '-'
&& (argv[optind][1] == '-' || long_only))
#ifdef GETOPT_COMPAT
|| argv[optind][0] == '+'
#endif /* GETOPT_COMPAT */
))
{
const struct option *p;
char *s = nextchar;
int exact = 0;
int ambig = 0;
const struct option *pfound = NULL;
int indfound;
while (*s && *s != '=')
s++;
/* Test all options for either exact match or abbreviated matches. */
for (p = longopts, option_index = 0; p->name;
p++, option_index++)
if (!strncmp (p->name, nextchar, s - nextchar))
{
if (s - nextchar == strlen (p->name))
{
/* Exact match found. */
pfound = p;
indfound = option_index;
exact = 1;
break;
}
else if (pfound == NULL)
{
/* First nonexact match found. */
pfound = p;
indfound = option_index;
}
else
/* Second nonexact match found. */
ambig = 1;
}
if (ambig && !exact)
{
if (opterr)
fprintf (stderr, "%s: option `%s' is ambiguous\n",
argv[0], argv[optind]);
nextchar += strlen (nextchar);
optind++;
return '?';
}
if (pfound != NULL)
{
option_index = indfound;
optind++;
if (*s)
{
/* Don't test has_arg with >, because some C compilers don't
allow it to be used on enums. */
if (pfound->has_arg)
optarg = s + 1;
else
{
if (opterr)
{
if (argv[optind - 1][1] == '-')
/* --option */
fprintf (stderr,
"%s: option `--%s' doesn't allow an argument\n",
argv[0], pfound->name);
else
/* +option or -option */
fprintf (stderr,
"%s: option `%c%s' doesn't allow an argument\n",
argv[0], argv[optind - 1][0], pfound->name);
}
nextchar += strlen (nextchar);
return '?';
}
}
else if (pfound->has_arg == 1)
{
if (optind < argc)
optarg = argv[optind++];
else
{
if (opterr)
fprintf (stderr, "%s: option `%s' requires an argument\n",
argv[0], argv[optind - 1]);
nextchar += strlen (nextchar);
return optstring[0] == ':' ? ':' : '?';
}
}
nextchar += strlen (nextchar);
if (longind != NULL)
*longind = option_index;
if (pfound->flag)
{
*(pfound->flag) = pfound->val;
return 0;
}
return pfound->val;
}
/* Can't find it as a long option. If this is not getopt_long_only,
or the option starts with '--' or is not a valid short
option, then it's an error.
Otherwise interpret it as a short option. */
if (!long_only || argv[optind][1] == '-'
#ifdef GETOPT_COMPAT
|| argv[optind][0] == '+'
#endif /* GETOPT_COMPAT */
|| my_index (optstring, *nextchar) == NULL)
{
if (opterr)
{
if (argv[optind][1] == '-')
/* --option */
fprintf (stderr, "%s: unrecognized option `--%s'\n",
argv[0], nextchar);
else
/* +option or -option */
fprintf (stderr, "%s: unrecognized option `%c%s'\n",
argv[0], argv[optind][0], nextchar);
}
nextchar = (char *) "";
optind++;
return '?';
}
}
/* Look at and handle the next option-character. */
{
char c = *nextchar++;
char *temp = my_index (optstring, c);
/* Increment `optind' when we start to process its last character. */
if (*nextchar == '\0')
++optind;
if (temp == NULL || c == ':')
{
if (opterr)
{
#if 0
if (c < 040 || c >= 0177)
fprintf (stderr, "%s: unrecognized option, character code 0%o\n",
argv[0], c);
else
fprintf (stderr, "%s: unrecognized option `-%c'\n", argv[0], c);
#else
/* 1003.2 specifies the format of this message. */
fprintf (stderr, "%s: illegal option -- %c\n", argv[0], c);
#endif
}
optopt = c;
return '?';
}
if (temp[1] == ':')
{
if (temp[2] == ':')
{
/* This is an option that accepts an argument optionally. */
if (*nextchar != '\0')
{
optarg = nextchar;
optind++;
}
else
optarg = 0;
nextchar = NULL;
}
else
{
/* This is an option that requires an argument. */
if (*nextchar != '\0')
{
optarg = nextchar;
/* If we end this ARGV-element by taking the rest as an arg,
we must advance to the next element now. */
optind++;
}
else if (optind == argc)
{
if (opterr)
{
#if 0
fprintf (stderr, "%s: option `-%c' requires an argument\n",
argv[0], c);
#else
/* 1003.2 specifies the format of this message. */
fprintf (stderr, "%s: option requires an argument -- %c\n",
argv[0], c);
#endif
}
optopt = c;
if (optstring[0] == ':')
c = ':';
else
c = '?';
}
else
/* We already incremented `optind' once;
increment it again when taking next ARGV-elt as argument. */
optarg = argv[optind++];
nextchar = NULL;
}
}
return c;
}
}
int
getopt (argc, argv, optstring)
int argc;
char *const *argv;
const char *optstring;
{
return _getopt_internal (argc, argv, optstring,
(const struct option *) 0,
(int *) 0,
0);
}
#endif /* _LIBC or not __GNU_LIBRARY__. */
#ifdef TEST
/* Compile with -DTEST to make an executable for use in testing
the above definition of `getopt'. */
int
main (argc, argv)
int argc;
char **argv;
{
int c;
int digit_optind = 0;
while (1)
{
int this_option_optind = optind ? optind : 1;
c = getopt (argc, argv, "abc:d:0123456789");
if (c == EOF)
break;
switch (c)
{
case '0':
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9':
if (digit_optind != 0 && digit_optind != this_option_optind)
printf ("digits occur in two different argv-elements.\n");
digit_optind = this_option_optind;
printf ("option %c\n", c);
break;
case 'a':
printf ("option a\n");
break;
case 'b':
printf ("option b\n");
break;
case 'c':
printf ("option c with value `%s'\n", optarg);
break;
case '?':
break;
default:
printf ("?? getopt returned character code 0%o ??\n", c);
}
}
if (optind < argc)
{
printf ("non-option ARGV-elements: ");
while (optind < argc)
printf ("%s ", argv[optind++]);
printf ("\n");
}
exit (0);
}
#endif /* TEST */

129
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/* Declarations for getopt.
Copyright (C) 1989, 1990, 1991, 1992, 1993 Free Software Foundation, Inc.
This program is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by the
Free Software Foundation; either version 2, 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
#ifndef _GETOPT_H
#define _GETOPT_H 1
#ifdef __cplusplus
extern "C" {
#endif
/* For communication from `getopt' to the caller.
When `getopt' finds an option that takes an argument,
the argument value is returned here.
Also, when `ordering' is RETURN_IN_ORDER,
each non-option ARGV-element is returned here. */
extern char *optarg;
/* Index in ARGV of the next element to be scanned.
This is used for communication to and from the caller
and for communication between successive calls to `getopt'.
On entry to `getopt', zero means this is the first call; initialize.
When `getopt' returns EOF, this is the index of the first of the
non-option elements that the caller should itself scan.
Otherwise, `optind' communicates from one call to the next
how much of ARGV has been scanned so far. */
extern int optind;
/* Callers store zero here to inhibit the error message `getopt' prints
for unrecognized options. */
extern int opterr;
/* Set to an option character which was unrecognized. */
extern int optopt;
/* Describe the long-named options requested by the application.
The LONG_OPTIONS argument to getopt_long or getopt_long_only is a vector
of `struct option' terminated by an element containing a name which is
zero.
The field `has_arg' is:
no_argument (or 0) if the option does not take an argument,
required_argument (or 1) if the option requires an argument,
optional_argument (or 2) if the option takes an optional argument.
If the field `flag' is not NULL, it points to a variable that is set
to the value given in the field `val' when the option is found, but
left unchanged if the option is not found.
To have a long-named option do something other than set an `int' to
a compiled-in constant, such as set a value from `optarg', set the
option's `flag' field to zero and its `val' field to a nonzero
value (the equivalent single-letter option character, if there is
one). For long options that have a zero `flag' field, `getopt'
returns the contents of the `val' field. */
struct option
{
#if __STDC__
const char *name;
#else
char *name;
#endif
/* has_arg can't be an enum because some compilers complain about
type mismatches in all the code that assumes it is an int. */
int has_arg;
int *flag;
int val;
};
/* Names for the values of the `has_arg' field of `struct option'. */
#define no_argument 0
#define required_argument 1
#define optional_argument 2
#if __STDC__
#if defined(__GNU_LIBRARY__)
/* Many other libraries have conflicting prototypes for getopt, with
differences in the consts, in stdlib.h. To avoid compilation
errors, only prototype getopt for the GNU C library. */
extern int getopt (int argc, char *const *argv, const char *shortopts);
#else /* not __GNU_LIBRARY__ */
extern int getopt ();
#endif /* not __GNU_LIBRARY__ */
extern int getopt_long (int argc, char *const *argv, const char *shortopts,
const struct option *longopts, int *longind);
extern int getopt_long_only (int argc, char *const *argv,
const char *shortopts,
const struct option *longopts, int *longind);
/* Internal only. Users should not call this directly. */
extern int _getopt_internal (int argc, char *const *argv,
const char *shortopts,
const struct option *longopts, int *longind,
int long_only);
#else /* not __STDC__ */
extern int getopt ();
extern int getopt_long ();
extern int getopt_long_only ();
extern int _getopt_internal ();
#endif /* not __STDC__ */
#ifdef __cplusplus
}
#endif
#endif /* _GETOPT_H */

42
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#ifdef BSD
#ifndef BSD4_1
#define HAVE_GETPAGESIZE
#endif
#endif
#ifndef HAVE_GETPAGESIZE
#ifdef VMS
#define getpagesize() 512
#endif
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#ifdef _SC_PAGESIZE
#define getpagesize() sysconf(_SC_PAGESIZE)
#else
#ifdef HAVE_SYS_PARAM_H
#include <sys/param.h>
#ifdef EXEC_PAGESIZE
#define getpagesize() EXEC_PAGESIZE
#else
#ifdef NBPG
#define getpagesize() NBPG * CLSIZE
#ifndef CLSIZE
#define CLSIZE 1
#endif /* no CLSIZE */
#else /* no NBPG */
#define getpagesize() NBPC
#endif /* no NBPG */
#endif /* no EXEC_PAGESIZE */
#else /* !HAVE_SYS_PARAM_H */
#define getpagesize() 8192 /* punt totally */
#endif /* !HAVE_SYS_PARAM_H */
#endif /* no _SC_PAGESIZE */
#endif /* not HAVE_GETPAGESIZE */

410
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.TH GREP 1 "1992 September 10" "GNU Project"
.SH NAME
grep, egrep, fgrep, zgrep \- print lines matching a pattern
.SH SYNOPSIS
.B grep
[\-[AB] num]
[\-HRPS]
[\-CEFGLVabchilnqsvwx]
[\-e expr]
[\-f file]
files...
.SH DESCRIPTION
.PP
.B Grep
searches the named input
.I files
(or standard input if no files are named, or
the file name
.B \-
is given)
for lines containing a match to the given
.IR pattern .
By default,
.B grep
prints the matching lines.
.PP
There are three major variants of
.BR grep ,
controlled by the following options.
.PD 0
.TP
.B \-G
Interpret
.I pattern
as a basic regular expression (see below). This is the default.
.TP
.B \-E
Interpret
.I pattern
as an extended regular expression (see below).
.TP
.B \-F
Interpret
.I pattern
as a list of fixed strings, separated by newlines,
any of which is to be matched.
.LP
In addition, two variant programs
.B egrep
and
.B fgrep
are available.
.B Egrep
is similar (but not identical) to
.BR "grep\ \-E" ,
and is compatible with the historical Unix
.BR egrep .
.B Fgrep
is the same as
.BR "grep\ \-F" .
When called as
.BR zgrep ,
the
.BR \-Z
option is assumed.
.PD
.LP
All variants of
.B grep
understand the following options:
.PD 0
.TP
.BI \- num
Matches will be printed with
.I num
lines of leading and trailing context. However,
.B grep
will never print any given line more than once.
.TP
.BI \-A " num"
Print
.I num
lines of trailing context after matching lines.
.TP
.BI \-B " num"
Print
.I num
lines of leading context before matching lines.
.TP
.B \-C
Equivalent to
.BR \-2 .
.TP
.B \-V
Print the version number of
.B grep
to standard error. This version number should
be included in all bug reports (see below).
.TP
.B \-a
Don't search in binary files.
.TP
.B \-b
Print the byte offset within the input file before
each line of output.
.TP
.B \-c
Suppress normal output; instead print a count of
matching lines for each input file.
With the
.B \-v
option (see below), count non-matching lines.
.TP
.BI \-e " pattern"
Use
.I pattern
as the pattern; useful to protect patterns beginning with
.BR \- .
.TP
.BI \-f " file"
Obtain the pattern from
.IR file .
.TP
.B \-h
Suppress the prefixing of filenames on output
when multiple files are searched.
.TP
.B \-i
Ignore case distinctions in both the
.I pattern
and the input files.
.TP
.B \-L
Suppress normal output; instead print the name
of each input file from which no output would
normally have been printed.
.TP
.B \-l
Suppress normal output; instead print
the name of each input file from which output
would normally have been printed.
.TP
.B \-n
Prefix each line of output with the line number
within its input file.
.TP
.B \-q
Quiet; suppress normal output.
.TP
.B \-s
Suppress error messages about nonexistent or unreadable files.
.TP
.B \-v
Invert the sense of matching, to select non-matching lines.
.TP
.B \-w
Select only those lines containing matches that form whole words.
The test is that the matching substring must either be at the
beginning of the line, or preceded by a non-word constituent
character. Similarly, it must be either at the end of the line
or followed by a non-word constituent character. Word-constituent
characters are letters, digits, and the underscore.
.TP
.B \-x
Select only those matches that exactly match the whole line.
.PP
Following options are only available if compiled with FTS library:
.PD 0
.TP
.BI \-H
If the
.I \-R
option is specified, symbolic links on the command line
are followed. (Symbolic links encountered in the tree traversal
are not followed.)
.TP
.BI \-L
If the
.I \-R
option is specified, all symbolic links are followed.
.TP
.BI \-P
If the
.I \-R
option is specified, no symbolic links are followed.
.TP
.BI \-R
Search in the file hierarchies
rooted in the files instead of just the files themselves.
.LP
Following option is only available if compiled with zlib library:
.PD 0
.TP
.BI \-Z
If the
.I \-Z
option is specified, the input data will be
decompressed before searching.
.TP
.PD
.SH "REGULAR EXPRESSIONS"
.PP
A regular expression is a pattern that describes a set of strings.
Regular expressions are constructed analogously to arithmetic
expressions, by using various operators to combine smaller expressions.
.PP
.B Grep
understands two different versions of regular expression syntax:
``basic'' and ``extended.'' In
.RB "GNU\ " grep ,
there is no difference in available functionality using either syntax.
In other implementations, basic regular expressions are less powerful.
The following description applies to extended regular expressions;
differences for basic regular expressions are summarized afterwards.
.PP
The fundamental building blocks are the regular expressions that match
a single character. Most characters, including all letters and digits,
are regular expressions that match themselves. Any metacharacter with
special meaning may be quoted by preceding it with a backslash.
.PP
A list of characters enclosed by
.B [
and
.B ]
matches any single
character in that list; if the first character of the list
is the caret
.B ^
then it matches any character
.I not
in the list.
For example, the regular expression
.B [0123456789]
matches any single digit. A range of ASCII characters
may be specified by giving the first and last characters, separated
by a hyphen.
Finally, certain named classes of characters are predefined.
Their names are self explanatory, and they are
.BR [:alnum:] ,
.BR [:alpha:] ,
.BR [:cntrl:] ,
.BR [:digit:] ,
.BR [:graph:] ,
.BR [:lower:] ,
.BR [:print:] ,
.BR [:punct:] ,
.BR [:space:] ,
.BR [:upper:] ,
and
.BR [:xdigit:].
For example,
.B [[:alnum:]]
means
.BR [0-9A-Za-z] ,
except the latter form is dependent upon the ASCII character encoding,
whereas the former is portable.
(Note that the brackets in these class names are part of the symbolic
names, and must be included in addition to the brackets delimiting
the bracket list.) Most metacharacters lose their special meaning
inside lists. To include a literal
.B ]
place it first in the list. Similarly, to include a literal
.B ^
place it anywhere but first. Finally, to include a literal
.B \-
place it last.
.PP
The period
.B .
matches any single character.
The symbol
.B \ew
is a synonym for
.B [[:alnum:]]
and
.B \eW
is a synonym for
.BR [^[:alnum]] .
.PP
The caret
.B ^
and the dollar sign
.B $
are metacharacters that respectively match the empty string at the
beginning and end of a line.
The symbols
.B \e<
and
.B \e>
respectively match the empty string at the beginning and end of a word.
The symbol
.B \eb
matches the empty string at the edge of a word,
and
.B \eB
matches the empty string provided it's
.I not
at the edge of a word.
.PP
A regular expression matching a single character may be followed
by one of several repetition operators:
.PD 0
.TP
.B ?
The preceding item is optional and matched at most once.
.TP
.B *
The preceding item will be matched zero or more times.
.TP
.B +
The preceding item will be matched one or more times.
.TP
.BI { n }
The preceding item is matched exactly
.I n
times.
.TP
.BI { n ,}
The preceding item is matched
.I n
or more times.
.TP
.BI {, m }
The preceding item is optional and is matched at most
.I m
times.
.TP
.BI { n , m }
The preceding item is matched at least
.I n
times, but not more than
.I m
times.
.PD
.PP
Two regular expressions may be concatenated; the resulting
regular expression matches any string formed by concatenating
two substrings that respectively match the concatenated
subexpressions.
.PP
Two regular expressions may be joined by the infix operator
.BR | ;
the resulting regular expression matches any string matching
either subexpression.
.PP
Repetition takes precedence over concatenation, which in turn
takes precedence over alternation. A whole subexpression may be
enclosed in parentheses to override these precedence rules.
.PP
The backreference
.BI \e n\c
\&, where
.I n
is a single digit, matches the substring
previously matched by the
.IR n th
parenthesized subexpression of the regular expression.
.PP
In basic regular expressions the metacharacters
.BR ? ,
.BR + ,
.BR { ,
.BR | ,
.BR ( ,
and
.BR )
lose their special meaning; instead use the backslashed
versions
.BR \e? ,
.BR \e+ ,
.BR \e{ ,
.BR \e| ,
.BR \e( ,
and
.BR \e) .
.PP
In
.B egrep
the metacharacter
.B {
loses its special meaning; instead use
.BR \e{ .
.SH DIAGNOSTICS
.PP
Normally, exit status is 0 if matches were found,
and 1 if no matches were found. (The
.B \-v
option inverts the sense of the exit status.)
Exit status is 2 if there were syntax errors
in the pattern, inaccessible input files, or
other system errors.
.SH BUGS
.PP
Email bug reports to
.BR bug-gnu-utils@prep.ai.mit.edu .
Be sure to include the word ``grep'' somewhere in the ``Subject:'' field.
.PP
Large repetition counts in the
.BI { m , n }
construct may cause grep to use lots of memory.
In addition,
certain other obscure regular expressions require exponential time
and space, and may cause
.B grep
to run out of memory.
.PP
Backreferences are very slow, and may require exponential time.

1103
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/* grep.h - interface to grep driver for searching subroutines.
Copyright (C) 1992 Free Software Foundation, Inc.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
#if __STDC__
extern void fatal(const char *, int);
/* Grep.c expects the matchers vector to be terminated
by an entry with a NULL name, and to contain at least
an entry named "default". */
extern struct matcher
{
char *name;
void (*compile)(char *, size_t);
char *(*execute)(char *, size_t, char **);
} matchers[];
#else
extern void fatal();
extern struct matcher
{
char *name;
void (*compile)();
char *(*execute)();
} matchers[];
#endif
/* Exported from grep.c. */
extern char *matcher;
/* The following flags are exported from grep for the matchers
to look at. */
extern int match_icase; /* -i */
extern int match_words; /* -w */
extern int match_lines; /* -x */

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/* kwset.c - search for any of a set of keywords.
Copyright 1989 Free Software Foundation
Written August 1989 by Mike Haertel.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 1, 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
The author may be reached (Email) at the address mike@ai.mit.edu,
or (US mail) as Mike Haertel c/o Free Software Foundation. */
/* The algorithm implemented by these routines bears a startling resemblence
to one discovered by Beate Commentz-Walter, although it is not identical.
See "A String Matching Algorithm Fast on the Average," Technical Report,
IBM-Germany, Scientific Center Heidelberg, Tiergartenstrasse 15, D-6900
Heidelberg, Germany. See also Aho, A.V., and M. Corasick, "Efficient
String Matching: An Aid to Bibliographic Search," CACM June 1975,
Vol. 18, No. 6, which describes the failure function used below. */
/* $FreeBSD$ */
#ifdef STDC_HEADERS
#include <limits.h>
#include <stdlib.h>
#else
#define INT_MAX 2147483647
#define UCHAR_MAX 255
#ifdef __STDC__
#include <stddef.h>
#else
#include <sys/types.h>
#endif
extern char *malloc();
extern void free();
#endif
#ifdef HAVE_MEMCHR
#include <string.h>
#ifdef NEED_MEMORY_H
#include <memory.h>
#endif
#else
#ifdef __STDC__
extern void *memchr();
#else
extern char *memchr();
#endif
#endif
#ifdef GREP
extern char *xmalloc();
#define malloc xmalloc
#endif
#include "kwset.h"
#include "obstack.h"
#define NCHAR (UCHAR_MAX + 1)
#define obstack_chunk_alloc malloc
#define obstack_chunk_free free
/* Balanced tree of edges and labels leaving a given trie node. */
struct tree
{
struct tree *llink; /* Left link; MUST be first field. */
struct tree *rlink; /* Right link (to larger labels). */
struct trie *trie; /* Trie node pointed to by this edge. */
unsigned char label; /* Label on this edge. */
char balance; /* Difference in depths of subtrees. */
};
/* Node of a trie representing a set of reversed keywords. */
struct trie
{
unsigned int accepting; /* Word index of accepted word, or zero. */
struct tree *links; /* Tree of edges leaving this node. */
struct trie *parent; /* Parent of this node. */
struct trie *next; /* List of all trie nodes in level order. */
struct trie *fail; /* Aho-Corasick failure function. */
int depth; /* Depth of this node from the root. */
int shift; /* Shift function for search failures. */
int maxshift; /* Max shift of self and descendents. */
};
/* Structure returned opaquely to the caller, containing everything. */
struct kwset
{
struct obstack obstack; /* Obstack for node allocation. */
int words; /* Number of words in the trie. */
struct trie *trie; /* The trie itself. */
int mind; /* Minimum depth of an accepting node. */
int maxd; /* Maximum depth of any node. */
unsigned char delta[NCHAR]; /* Delta table for rapid search. */
struct trie *next[NCHAR]; /* Table of children of the root. */
char *target; /* Target string if there's only one. */
int mind2; /* Used in Boyer-Moore search for one string. */
char *trans; /* Character translation table. */
};
/* Allocate and initialize a keyword set object, returning an opaque
pointer to it. Return NULL if memory is not available. */
kwset_t
kwsalloc(trans)
char *trans;
{
struct kwset *kwset;
kwset = (struct kwset *) malloc(sizeof (struct kwset));
if (!kwset)
return 0;
obstack_init(&kwset->obstack);
kwset->words = 0;
kwset->trie
= (struct trie *) obstack_alloc(&kwset->obstack, sizeof (struct trie));
if (!kwset->trie)
{
kwsfree((kwset_t) kwset);
return 0;
}
kwset->trie->accepting = 0;
kwset->trie->links = 0;
kwset->trie->parent = 0;
kwset->trie->next = 0;
kwset->trie->fail = 0;
kwset->trie->depth = 0;
kwset->trie->shift = 0;
kwset->mind = INT_MAX;
kwset->maxd = -1;
kwset->target = 0;
kwset->trans = trans;
return (kwset_t) kwset;
}
/* Add the given string to the contents of the keyword set. Return NULL
for success, an error message otherwise. */
char *
kwsincr(kws, text, len)
kwset_t kws;
char *text;
size_t len;
{
struct kwset *kwset;
register struct trie *trie;
register unsigned char label;
register struct tree *link;
register int depth;
struct tree *links[12];
enum { L, R } dirs[12];
struct tree *t, *r, *l, *rl, *lr;
kwset = (struct kwset *) kws;
trie = kwset->trie;
text += len;
/* Descend the trie (built of reversed keywords) character-by-character,
installing new nodes when necessary. */
while (len--)
{
label = kwset->trans ? kwset->trans[(unsigned char) *--text] : *--text;
/* Descend the tree of outgoing links for this trie node,
looking for the current character and keeping track
of the path followed. */
link = trie->links;
links[0] = (struct tree *) &trie->links;
dirs[0] = L;
depth = 1;
while (link && label != link->label)
{
links[depth] = link;
if (label < link->label)
dirs[depth++] = L, link = link->llink;
else
dirs[depth++] = R, link = link->rlink;
}
/* The current character doesn't have an outgoing link at
this trie node, so build a new trie node and install
a link in the current trie node's tree. */
if (!link)
{
link = (struct tree *) obstack_alloc(&kwset->obstack,
sizeof (struct tree));
if (!link)
return "memory exhausted";
link->llink = 0;
link->rlink = 0;
link->trie = (struct trie *) obstack_alloc(&kwset->obstack,
sizeof (struct trie));
if (!link->trie)
return "memory exhausted";
link->trie->accepting = 0;
link->trie->links = 0;
link->trie->parent = trie;
link->trie->next = 0;
link->trie->fail = 0;
link->trie->depth = trie->depth + 1;
link->trie->shift = 0;
link->label = label;
link->balance = 0;
/* Install the new tree node in its parent. */
if (dirs[--depth] == L)
links[depth]->llink = link;
else
links[depth]->rlink = link;
/* Back up the tree fixing the balance flags. */
while (depth && !links[depth]->balance)
{
if (dirs[depth] == L)
--links[depth]->balance;
else
++links[depth]->balance;
--depth;
}
/* Rebalance the tree by pointer rotations if necessary. */
if (depth && ((dirs[depth] == L && --links[depth]->balance)
|| (dirs[depth] == R && ++links[depth]->balance)))
{
switch (links[depth]->balance)
{
case (char) -2:
switch (dirs[depth + 1])
{
case L:
r = links[depth], t = r->llink, rl = t->rlink;
t->rlink = r, r->llink = rl;
t->balance = r->balance = 0;
break;
case R:
r = links[depth], l = r->llink, t = l->rlink;
rl = t->rlink, lr = t->llink;
t->llink = l, l->rlink = lr, t->rlink = r, r->llink = rl;
l->balance = t->balance != 1 ? 0 : -1;
r->balance = t->balance != (char) -1 ? 0 : 1;
t->balance = 0;
break;
}
break;
case 2:
switch (dirs[depth + 1])
{
case R:
l = links[depth], t = l->rlink, lr = t->llink;
t->llink = l, l->rlink = lr;
t->balance = l->balance = 0;
break;
case L:
l = links[depth], r = l->rlink, t = r->llink;
lr = t->llink, rl = t->rlink;
t->llink = l, l->rlink = lr, t->rlink = r, r->llink = rl;
l->balance = t->balance != 1 ? 0 : -1;
r->balance = t->balance != (char) -1 ? 0 : 1;
t->balance = 0;
break;
}
break;
}
if (dirs[depth - 1] == L)
links[depth - 1]->llink = t;
else
links[depth - 1]->rlink = t;
}
}
trie = link->trie;
}
/* Mark the node we finally reached as accepting, encoding the
index number of this word in the keyword set so far. */
if (!trie->accepting)
trie->accepting = 1 + 2 * kwset->words;
++kwset->words;
/* Keep track of the longest and shortest string of the keyword set. */
if (trie->depth < kwset->mind)
kwset->mind = trie->depth;
if (trie->depth > kwset->maxd)
kwset->maxd = trie->depth;
return 0;
}
/* Enqueue the trie nodes referenced from the given tree in the
given queue. */
static void
enqueue(tree, last)
struct tree *tree;
struct trie **last;
{
if (!tree)
return;
enqueue(tree->llink, last);
enqueue(tree->rlink, last);
(*last) = (*last)->next = tree->trie;
}
/* Compute the Aho-Corasick failure function for the trie nodes referenced
from the given tree, given the failure function for their parent as
well as a last resort failure node. */
static void
treefails(tree, fail, recourse)
register struct tree *tree;
struct trie *fail;
struct trie *recourse;
{
register struct tree *link;
if (!tree)
return;
treefails(tree->llink, fail, recourse);
treefails(tree->rlink, fail, recourse);
/* Find, in the chain of fails going back to the root, the first
node that has a descendent on the current label. */
while (fail)
{
link = fail->links;
while (link && tree->label != link->label)
if (tree->label < link->label)
link = link->llink;
else
link = link->rlink;
if (link)
{
tree->trie->fail = link->trie;
return;
}
fail = fail->fail;
}
tree->trie->fail = recourse;
}
/* Set delta entries for the links of the given tree such that
the preexisting delta value is larger than the current depth. */
static void
treedelta(tree, depth, delta)
register struct tree *tree;
register unsigned int depth;
unsigned char delta[];
{
if (!tree)
return;
treedelta(tree->llink, depth, delta);
treedelta(tree->rlink, depth, delta);
if (depth < delta[tree->label])
delta[tree->label] = depth;
}
/* Return true if A has every label in B. */
static int
hasevery(a, b)
register struct tree *a;
register struct tree *b;
{
if (!b)
return 1;
if (!hasevery(a, b->llink))
return 0;
if (!hasevery(a, b->rlink))
return 0;
while (a && b->label != a->label)
if (b->label < a->label)
a = a->llink;
else
a = a->rlink;
return !!a;
}
/* Compute a vector, indexed by character code, of the trie nodes
referenced from the given tree. */
static void
treenext(tree, next)
struct tree *tree;
struct trie *next[];
{
if (!tree)
return;
treenext(tree->llink, next);
treenext(tree->rlink, next);
next[tree->label] = tree->trie;
}
/* Compute the shift for each trie node, as well as the delta
table and next cache for the given keyword set. */
char *
kwsprep(kws)
kwset_t kws;
{
register struct kwset *kwset;
register int i;
register struct trie *curr, *fail;
register char *trans;
unsigned char delta[NCHAR];
struct trie *last, *next[NCHAR];
kwset = (struct kwset *) kws;
/* Initial values for the delta table; will be changed later. The
delta entry for a given character is the smallest depth of any
node at which an outgoing edge is labeled by that character. */
if (kwset->mind < 256)
for (i = 0; i < NCHAR; ++i)
delta[i] = kwset->mind;
else
for (i = 0; i < NCHAR; ++i)
delta[i] = 255;
/* Check if we can use the simple boyer-moore algorithm, instead
of the hairy commentz-walter algorithm. */
if (kwset->words == 1 && kwset->trans == 0)
{
/* Looking for just one string. Extract it from the trie. */
kwset->target = obstack_alloc(&kwset->obstack, kwset->mind);
for (i = kwset->mind - 1, curr = kwset->trie; i >= 0; --i)
{
kwset->target[i] = curr->links->label;
curr = curr->links->trie;
}
/* Build the Boyer Moore delta. Boy that's easy compared to CW. */
for (i = 0; i < kwset->mind; ++i)
delta[(unsigned char) kwset->target[i]] = kwset->mind - (i + 1);
kwset->mind2 = kwset->mind;
/* Find the minimal delta2 shift that we might make after
a backwards match has failed. */
for (i = 0; i < kwset->mind - 1; ++i)
if (kwset->target[i] == kwset->target[kwset->mind - 1])
kwset->mind2 = kwset->mind - (i + 1);
}
else
{
/* Traverse the nodes of the trie in level order, simultaneously
computing the delta table, failure function, and shift function. */
for (curr = last = kwset->trie; curr; curr = curr->next)
{
/* Enqueue the immediate descendents in the level order queue. */
enqueue(curr->links, &last);
curr->shift = kwset->mind;
curr->maxshift = kwset->mind;
/* Update the delta table for the descendents of this node. */
treedelta(curr->links, curr->depth, delta);
/* Compute the failure function for the decendents of this node. */
treefails(curr->links, curr->fail, kwset->trie);
/* Update the shifts at each node in the current node's chain
of fails back to the root. */
for (fail = curr->fail; fail; fail = fail->fail)
{
/* If the current node has some outgoing edge that the fail
doesn't, then the shift at the fail should be no larger
than the difference of their depths. */
if (!hasevery(fail->links, curr->links))
if (curr->depth - fail->depth < fail->shift)
fail->shift = curr->depth - fail->depth;
/* If the current node is accepting then the shift at the
fail and its descendents should be no larger than the
difference of their depths. */
if (curr->accepting && fail->maxshift > curr->depth - fail->depth)
fail->maxshift = curr->depth - fail->depth;
}
}
/* Traverse the trie in level order again, fixing up all nodes whose
shift exceeds their inherited maxshift. */
for (curr = kwset->trie->next; curr; curr = curr->next)
{
if (curr->maxshift > curr->parent->maxshift)
curr->maxshift = curr->parent->maxshift;
if (curr->shift > curr->maxshift)
curr->shift = curr->maxshift;
}
/* Create a vector, indexed by character code, of the outgoing links
from the root node. */
for (i = 0; i < NCHAR; ++i)
next[i] = 0;
treenext(kwset->trie->links, next);
if ((trans = kwset->trans) != 0)
for (i = 0; i < NCHAR; ++i)
kwset->next[i] = next[(unsigned char) trans[i]];
else
for (i = 0; i < NCHAR; ++i)
kwset->next[i] = next[i];
}
/* Fix things up for any translation table. */
if ((trans = kwset->trans) != 0)
for (i = 0; i < NCHAR; ++i)
kwset->delta[i] = delta[(unsigned char) trans[i]];
else
for (i = 0; i < NCHAR; ++i)
kwset->delta[i] = delta[i];
return 0;
}
#define U(C) ((unsigned char) (C))
/* Fast boyer-moore search. */
static char *
bmexec(kws, text, size)
kwset_t kws;
char *text;
size_t size;
{
struct kwset *kwset;
register unsigned char *d1;
register char *ep, *sp, *tp;
register int d, gc, i, len, md2;
kwset = (struct kwset *) kws;
len = kwset->mind;
if (len == 0)
return text;
if (len > size)
return 0;
if (len == 1)
return memchr(text, kwset->target[0], size);
d1 = kwset->delta;
sp = kwset->target + len;
gc = U(sp[-2]);
md2 = kwset->mind2;
tp = text + len;
/* Significance of 12: 1 (initial offset) + 10 (skip loop) + 1 (md2). */
if (size > 12 * len)
/* 11 is not a bug, the initial offset happens only once. */
for (ep = text + size - 11 * len;;)
{
while (tp <= ep)
{
d = d1[U(tp[-1])], tp += d;
d = d1[U(tp[-1])], tp += d;
if (d == 0)
goto found;
d = d1[U(tp[-1])], tp += d;
d = d1[U(tp[-1])], tp += d;
d = d1[U(tp[-1])], tp += d;
if (d == 0)
goto found;
d = d1[U(tp[-1])], tp += d;
d = d1[U(tp[-1])], tp += d;
d = d1[U(tp[-1])], tp += d;
if (d == 0)
goto found;
d = d1[U(tp[-1])], tp += d;
d = d1[U(tp[-1])], tp += d;
}
break;
found:
if (U(tp[-2]) == gc)
{
for (i = 3; i <= len && U(tp[-i]) == U(sp[-i]); ++i)
;
if (i > len)
return tp - len;
}
tp += md2;
}
/* Now we have only a few characters left to search. We
carefully avoid ever producing an out-of-bounds pointer. */
ep = text + size;
d = d1[U(tp[-1])];
while (d <= ep - tp)
{
d = d1[U((tp += d)[-1])];
if (d != 0)
continue;
if (U(tp[-2]) == gc)
{
for (i = 3; i <= len && U(tp[-i]) == U(sp[-i]); ++i)
;
if (i > len)
return tp - len;
}
d = md2;
}
return 0;
}
/* Hairy multiple string search. */
static char *
cwexec(kws, text, len, kwsmatch)
kwset_t kws;
char *text;
size_t len;
struct kwsmatch *kwsmatch;
{
struct kwset *kwset;
struct trie **next, *trie, *accept;
char *beg, *lim, *mch, *lmch;
register unsigned char c, *delta;
register int d;
register char *end, *qlim;
register struct tree *tree;
register char *trans;
/* Initialize register copies and look for easy ways out. */
kwset = (struct kwset *) kws;
if (len < kwset->mind)
return 0;
next = kwset->next;
delta = kwset->delta;
trans = kwset->trans;
lim = text + len;
end = text;
if ((d = kwset->mind) != 0)
mch = 0;
else
{
mch = text, accept = kwset->trie;
goto match;
}
if (len >= 4 * kwset->mind)
qlim = lim - 4 * kwset->mind;
else
qlim = 0;
while (lim - end >= d)
{
if (qlim && end <= qlim)
{
end += d - 1;
while ((d = delta[c = *end]) && end < qlim)
{
end += d;
end += delta[(unsigned char) *end];
end += delta[(unsigned char) *end];
}
++end;
}
else
d = delta[c = (end += d)[-1]];
if (d)
continue;
beg = end - 1;
trie = next[c];
if (trie->accepting)
{
mch = beg;
accept = trie;
}
d = trie->shift;
while (beg > text)
{
c = trans ? trans[(unsigned char) *--beg] : *--beg;
tree = trie->links;
while (tree && c != tree->label)
if (c < tree->label)
tree = tree->llink;
else
tree = tree->rlink;
if (tree)
{
trie = tree->trie;
if (trie->accepting)
{
mch = beg;
accept = trie;
}
}
else
break;
d = trie->shift;
}
if (mch)
goto match;
}
return 0;
match:
/* Given a known match, find the longest possible match anchored
at or before its starting point. This is nearly a verbatim
copy of the preceding main search loops. */
if (lim - mch > kwset->maxd)
lim = mch + kwset->maxd;
lmch = 0;
d = 1;
while (lim - end >= d)
{
if ((d = delta[c = (end += d)[-1]]) != 0)
continue;
beg = end - 1;
if (!(trie = next[c]))
{
d = 1;
continue;
}
if (trie->accepting && beg <= mch)
{
lmch = beg;
accept = trie;
}
d = trie->shift;
while (beg > text)
{
c = trans ? trans[(unsigned char) *--beg] : *--beg;
tree = trie->links;
while (tree && c != tree->label)
if (c < tree->label)
tree = tree->llink;
else
tree = tree->rlink;
if (tree)
{
trie = tree->trie;
if (trie->accepting && beg <= mch)
{
lmch = beg;
accept = trie;
}
}
else
break;
d = trie->shift;
}
if (lmch)
{
mch = lmch;
goto match;
}
if (!d)
d = 1;
}
if (kwsmatch)
{
kwsmatch->index = accept->accepting / 2;
kwsmatch->beg[0] = mch;
kwsmatch->size[0] = accept->depth;
}
return mch;
}
/* Search through the given text for a match of any member of the
given keyword set. Return a pointer to the first character of
the matching substring, or NULL if no match is found. If FOUNDLEN
is non-NULL store in the referenced location the length of the
matching substring. Similarly, if FOUNDIDX is non-NULL, store
in the referenced location the index number of the particular
keyword matched. */
char *
kwsexec(kws, text, size, kwsmatch)
kwset_t kws;
char *text;
size_t size;
struct kwsmatch *kwsmatch;
{
struct kwset *kwset;
char *ret;
kwset = (struct kwset *) kws;
if (kwset->words == 1 && kwset->trans == 0)
{
ret = bmexec(kws, text, size);
if (kwsmatch != 0 && ret != 0)
{
kwsmatch->index = 0;
kwsmatch->beg[0] = ret;
kwsmatch->size[0] = kwset->mind;
}
return ret;
}
else
return cwexec(kws, text, size, kwsmatch);
}
/* Free the components of the given keyword set. */
void
kwsfree(kws)
kwset_t kws;
{
struct kwset *kwset;
kwset = (struct kwset *) kws;
obstack_free(&kwset->obstack, 0);
free(kws);
}

69
gnu/usr.bin/grep/kwset.h Normal file
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/* kwset.h - header declaring the keyword set library.
Copyright 1989 Free Software Foundation
Written August 1989 by Mike Haertel.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 1, 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
The author may be reached (Email) at the address mike@ai.mit.edu,
or (US mail) as Mike Haertel c/o Free Software Foundation. */
struct kwsmatch
{
int index; /* Index number of matching keyword. */
char *beg[1]; /* Begin pointer for each submatch. */
size_t size[1]; /* Length of each submatch. */
};
#if __STDC__
typedef void *kwset_t;
/* Return an opaque pointer to a newly allocated keyword set, or NULL
if enough memory cannot be obtained. The argument if non-NULL
specifies a table of character translations to be applied to all
pattern and search text. */
extern kwset_t kwsalloc(char *);
/* Incrementally extend the keyword set to include the given string.
Return NULL for success, or an error message. Remember an index
number for each keyword included in the set. */
extern char *kwsincr(kwset_t, char *, size_t);
/* When the keyword set has been completely built, prepare it for
use. Return NULL for success, or an error message. */
extern char *kwsprep(kwset_t);
/* Search through the given buffer for a member of the keyword set.
Return a pointer to the leftmost longest match found, or NULL if
no match is found. If foundlen is non-NULL, store the length of
the matching substring in the integer it points to. Similarly,
if foundindex is non-NULL, store the index of the particular
keyword found therein. */
extern char *kwsexec(kwset_t, char *, size_t, struct kwsmatch *);
/* Deallocate the given keyword set and all its associated storage. */
extern void kwsfree(kwset_t);
#else
typedef char *kwset_t;
extern kwset_t kwsalloc();
extern char *kwsincr();
extern char *kwsprep();
extern char *kwsexec();
extern void kwsfree();
#endif

454
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/* obstack.c - subroutines used implicitly by object stack macros
Copyright (C) 1988, 1993 Free Software Foundation, Inc.
This program is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by the
Free Software Foundation; either version 2, 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
#include "obstack.h"
/* This is just to get __GNU_LIBRARY__ defined. */
#include <stdio.h>
/* Comment out all this code if we are using the GNU C Library, and are not
actually compiling the library itself. This code is part of the GNU C
Library, but also included in many other GNU distributions. Compiling
and linking in this code is a waste when using the GNU C library
(especially if it is a shared library). Rather than having every GNU
program understand `configure --with-gnu-libc' and omit the object files,
it is simpler to just do this in the source for each such file. */
#if defined (_LIBC) || !defined (__GNU_LIBRARY__)
#ifdef __STDC__
#define POINTER void *
#else
#define POINTER char *
#endif
/* Determine default alignment. */
struct fooalign {char x; double d;};
#define DEFAULT_ALIGNMENT \
((PTR_INT_TYPE) ((char *)&((struct fooalign *) 0)->d - (char *)0))
/* If malloc were really smart, it would round addresses to DEFAULT_ALIGNMENT.
But in fact it might be less smart and round addresses to as much as
DEFAULT_ROUNDING. So we prepare for it to do that. */
union fooround {long x; double d;};
#define DEFAULT_ROUNDING (sizeof (union fooround))
/* When we copy a long block of data, this is the unit to do it with.
On some machines, copying successive ints does not work;
in such a case, redefine COPYING_UNIT to `long' (if that works)
or `char' as a last resort. */
#ifndef COPYING_UNIT
#define COPYING_UNIT int
#endif
/* The non-GNU-C macros copy the obstack into this global variable
to avoid multiple evaluation. */
struct obstack *_obstack;
/* Define a macro that either calls functions with the traditional malloc/free
calling interface, or calls functions with the mmalloc/mfree interface
(that adds an extra first argument), based on the state of use_extra_arg.
For free, do not use ?:, since some compilers, like the MIPS compilers,
do not allow (expr) ? void : void. */
#define CALL_CHUNKFUN(h, size) \
(((h) -> use_extra_arg) \
? (*(h)->chunkfun) ((h)->extra_arg, (size)) \
: (*(h)->chunkfun) ((size)))
#define CALL_FREEFUN(h, old_chunk) \
do { \
if ((h) -> use_extra_arg) \
(*(h)->freefun) ((h)->extra_arg, (old_chunk)); \
else \
(*(h)->freefun) ((old_chunk)); \
} while (0)
/* Initialize an obstack H for use. Specify chunk size SIZE (0 means default).
Objects start on multiples of ALIGNMENT (0 means use default).
CHUNKFUN is the function to use to allocate chunks,
and FREEFUN the function to free them. */
void
_obstack_begin (h, size, alignment, chunkfun, freefun)
struct obstack *h;
int size;
int alignment;
POINTER (*chunkfun) ();
void (*freefun) ();
{
register struct _obstack_chunk* chunk; /* points to new chunk */
if (alignment == 0)
alignment = DEFAULT_ALIGNMENT;
if (size == 0)
/* Default size is what GNU malloc can fit in a 4096-byte block. */
{
/* 12 is sizeof (mhead) and 4 is EXTRA from GNU malloc.
Use the values for range checking, because if range checking is off,
the extra bytes won't be missed terribly, but if range checking is on
and we used a larger request, a whole extra 4096 bytes would be
allocated.
These number are irrelevant to the new GNU malloc. I suspect it is
less sensitive to the size of the request. */
int extra = ((((12 + DEFAULT_ROUNDING - 1) & ~(DEFAULT_ROUNDING - 1))
+ 4 + DEFAULT_ROUNDING - 1)
& ~(DEFAULT_ROUNDING - 1));
size = 4096 - extra;
}
h->chunkfun = (struct _obstack_chunk * (*)()) chunkfun;
h->freefun = freefun;
h->chunk_size = size;
h->alignment_mask = alignment - 1;
h->use_extra_arg = 0;
chunk = h->chunk = CALL_CHUNKFUN (h, h -> chunk_size);
h->next_free = h->object_base = chunk->contents;
h->chunk_limit = chunk->limit
= (char *) chunk + h->chunk_size;
chunk->prev = 0;
/* The initial chunk now contains no empty object. */
h->maybe_empty_object = 0;
}
void
_obstack_begin_1 (h, size, alignment, chunkfun, freefun, arg)
struct obstack *h;
int size;
int alignment;
POINTER (*chunkfun) ();
void (*freefun) ();
POINTER arg;
{
register struct _obstack_chunk* chunk; /* points to new chunk */
if (alignment == 0)
alignment = DEFAULT_ALIGNMENT;
if (size == 0)
/* Default size is what GNU malloc can fit in a 4096-byte block. */
{
/* 12 is sizeof (mhead) and 4 is EXTRA from GNU malloc.
Use the values for range checking, because if range checking is off,
the extra bytes won't be missed terribly, but if range checking is on
and we used a larger request, a whole extra 4096 bytes would be
allocated.
These number are irrelevant to the new GNU malloc. I suspect it is
less sensitive to the size of the request. */
int extra = ((((12 + DEFAULT_ROUNDING - 1) & ~(DEFAULT_ROUNDING - 1))
+ 4 + DEFAULT_ROUNDING - 1)
& ~(DEFAULT_ROUNDING - 1));
size = 4096 - extra;
}
h->chunkfun = (struct _obstack_chunk * (*)()) chunkfun;
h->freefun = freefun;
h->chunk_size = size;
h->alignment_mask = alignment - 1;
h->extra_arg = arg;
h->use_extra_arg = 1;
chunk = h->chunk = CALL_CHUNKFUN (h, h -> chunk_size);
h->next_free = h->object_base = chunk->contents;
h->chunk_limit = chunk->limit
= (char *) chunk + h->chunk_size;
chunk->prev = 0;
/* The initial chunk now contains no empty object. */
h->maybe_empty_object = 0;
}
/* Allocate a new current chunk for the obstack *H
on the assumption that LENGTH bytes need to be added
to the current object, or a new object of length LENGTH allocated.
Copies any partial object from the end of the old chunk
to the beginning of the new one. */
void
_obstack_newchunk (h, length)
struct obstack *h;
int length;
{
register struct _obstack_chunk* old_chunk = h->chunk;
register struct _obstack_chunk* new_chunk;
register long new_size;
register int obj_size = h->next_free - h->object_base;
register int i;
int already;
/* Compute size for new chunk. */
new_size = (obj_size + length) + (obj_size >> 3) + 100;
if (new_size < h->chunk_size)
new_size = h->chunk_size;
/* Allocate and initialize the new chunk. */
new_chunk = h->chunk = CALL_CHUNKFUN (h, new_size);
new_chunk->prev = old_chunk;
new_chunk->limit = h->chunk_limit = (char *) new_chunk + new_size;
/* Move the existing object to the new chunk.
Word at a time is fast and is safe if the object
is sufficiently aligned. */
if (h->alignment_mask + 1 >= DEFAULT_ALIGNMENT)
{
for (i = obj_size / sizeof (COPYING_UNIT) - 1;
i >= 0; i--)
((COPYING_UNIT *)new_chunk->contents)[i]
= ((COPYING_UNIT *)h->object_base)[i];
/* We used to copy the odd few remaining bytes as one extra COPYING_UNIT,
but that can cross a page boundary on a machine
which does not do strict alignment for COPYING_UNITS. */
already = obj_size / sizeof (COPYING_UNIT) * sizeof (COPYING_UNIT);
}
else
already = 0;
/* Copy remaining bytes one by one. */
for (i = already; i < obj_size; i++)
new_chunk->contents[i] = h->object_base[i];
/* If the object just copied was the only data in OLD_CHUNK,
free that chunk and remove it from the chain.
But not if that chunk might contain an empty object. */
if (h->object_base == old_chunk->contents && ! h->maybe_empty_object)
{
new_chunk->prev = old_chunk->prev;
CALL_FREEFUN (h, old_chunk);
}
h->object_base = new_chunk->contents;
h->next_free = h->object_base + obj_size;
/* The new chunk certainly contains no empty object yet. */
h->maybe_empty_object = 0;
}
/* Return nonzero if object OBJ has been allocated from obstack H.
This is here for debugging.
If you use it in a program, you are probably losing. */
int
_obstack_allocated_p (h, obj)
struct obstack *h;
POINTER obj;
{
register struct _obstack_chunk* lp; /* below addr of any objects in this chunk */
register struct _obstack_chunk* plp; /* point to previous chunk if any */
lp = (h)->chunk;
/* We use >= rather than > since the object cannot be exactly at
the beginning of the chunk but might be an empty object exactly
at the end of an adjacent chunk. */
while (lp != 0 && ((POINTER)lp >= obj || (POINTER)(lp)->limit < obj))
{
plp = lp->prev;
lp = plp;
}
return lp != 0;
}
/* Free objects in obstack H, including OBJ and everything allocate
more recently than OBJ. If OBJ is zero, free everything in H. */
#undef obstack_free
/* This function has two names with identical definitions.
This is the first one, called from non-ANSI code. */
void
_obstack_free (h, obj)
struct obstack *h;
POINTER obj;
{
register struct _obstack_chunk* lp; /* below addr of any objects in this chunk */
register struct _obstack_chunk* plp; /* point to previous chunk if any */
lp = h->chunk;
/* We use >= because there cannot be an object at the beginning of a chunk.
But there can be an empty object at that address
at the end of another chunk. */
while (lp != 0 && ((POINTER)lp >= obj || (POINTER)(lp)->limit < obj))
{
plp = lp->prev;
CALL_FREEFUN (h, lp);
lp = plp;
/* If we switch chunks, we can't tell whether the new current
chunk contains an empty object, so assume that it may. */
h->maybe_empty_object = 1;
}
if (lp)
{
h->object_base = h->next_free = (char *)(obj);
h->chunk_limit = lp->limit;
h->chunk = lp;
}
else if (obj != 0)
/* obj is not in any of the chunks! */
abort ();
}
/* This function is used from ANSI code. */
void
obstack_free (h, obj)
struct obstack *h;
POINTER obj;
{
register struct _obstack_chunk* lp; /* below addr of any objects in this chunk */
register struct _obstack_chunk* plp; /* point to previous chunk if any */
lp = h->chunk;
/* We use >= because there cannot be an object at the beginning of a chunk.
But there can be an empty object at that address
at the end of another chunk. */
while (lp != 0 && ((POINTER)lp >= obj || (POINTER)(lp)->limit < obj))
{
plp = lp->prev;
CALL_FREEFUN (h, lp);
lp = plp;
/* If we switch chunks, we can't tell whether the new current
chunk contains an empty object, so assume that it may. */
h->maybe_empty_object = 1;
}
if (lp)
{
h->object_base = h->next_free = (char *)(obj);
h->chunk_limit = lp->limit;
h->chunk = lp;
}
else if (obj != 0)
/* obj is not in any of the chunks! */
abort ();
}
#if 0
/* These are now turned off because the applications do not use it
and it uses bcopy via obstack_grow, which causes trouble on sysV. */
/* Now define the functional versions of the obstack macros.
Define them to simply use the corresponding macros to do the job. */
#ifdef __STDC__
/* These function definitions do not work with non-ANSI preprocessors;
they won't pass through the macro names in parentheses. */
/* The function names appear in parentheses in order to prevent
the macro-definitions of the names from being expanded there. */
POINTER (obstack_base) (obstack)
struct obstack *obstack;
{
return obstack_base (obstack);
}
POINTER (obstack_next_free) (obstack)
struct obstack *obstack;
{
return obstack_next_free (obstack);
}
int (obstack_object_size) (obstack)
struct obstack *obstack;
{
return obstack_object_size (obstack);
}
int (obstack_room) (obstack)
struct obstack *obstack;
{
return obstack_room (obstack);
}
void (obstack_grow) (obstack, pointer, length)
struct obstack *obstack;
POINTER pointer;
int length;
{
obstack_grow (obstack, pointer, length);
}
void (obstack_grow0) (obstack, pointer, length)
struct obstack *obstack;
POINTER pointer;
int length;
{
obstack_grow0 (obstack, pointer, length);
}
void (obstack_1grow) (obstack, character)
struct obstack *obstack;
int character;
{
obstack_1grow (obstack, character);
}
void (obstack_blank) (obstack, length)
struct obstack *obstack;
int length;
{
obstack_blank (obstack, length);
}
void (obstack_1grow_fast) (obstack, character)
struct obstack *obstack;
int character;
{
obstack_1grow_fast (obstack, character);
}
void (obstack_blank_fast) (obstack, length)
struct obstack *obstack;
int length;
{
obstack_blank_fast (obstack, length);
}
POINTER (obstack_finish) (obstack)
struct obstack *obstack;
{
return obstack_finish (obstack);
}
POINTER (obstack_alloc) (obstack, length)
struct obstack *obstack;
int length;
{
return obstack_alloc (obstack, length);
}
POINTER (obstack_copy) (obstack, pointer, length)
struct obstack *obstack;
POINTER pointer;
int length;
{
return obstack_copy (obstack, pointer, length);
}
POINTER (obstack_copy0) (obstack, pointer, length)
struct obstack *obstack;
POINTER pointer;
int length;
{
return obstack_copy0 (obstack, pointer, length);
}
#endif /* __STDC__ */
#endif /* 0 */
#endif /* _LIBC or not __GNU_LIBRARY__. */

484
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/* obstack.h - object stack macros
Copyright (C) 1988, 1992 Free Software Foundation, Inc.
This program is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by the
Free Software Foundation; either version 2, 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
/* Summary:
All the apparent functions defined here are macros. The idea
is that you would use these pre-tested macros to solve a
very specific set of problems, and they would run fast.
Caution: no side-effects in arguments please!! They may be
evaluated MANY times!!
These macros operate a stack of objects. Each object starts life
small, and may grow to maturity. (Consider building a word syllable
by syllable.) An object can move while it is growing. Once it has
been "finished" it never changes address again. So the "top of the
stack" is typically an immature growing object, while the rest of the
stack is of mature, fixed size and fixed address objects.
These routines grab large chunks of memory, using a function you
supply, called `obstack_chunk_alloc'. On occasion, they free chunks,
by calling `obstack_chunk_free'. You must define them and declare
them before using any obstack macros.
Each independent stack is represented by a `struct obstack'.
Each of the obstack macros expects a pointer to such a structure
as the first argument.
One motivation for this package is the problem of growing char strings
in symbol tables. Unless you are "fascist pig with a read-only mind"
--Gosper's immortal quote from HAKMEM item 154, out of context--you
would not like to put any arbitrary upper limit on the length of your
symbols.
In practice this often means you will build many short symbols and a
few long symbols. At the time you are reading a symbol you don't know
how long it is. One traditional method is to read a symbol into a
buffer, realloc()ating the buffer every time you try to read a symbol
that is longer than the buffer. This is beaut, but you still will
want to copy the symbol from the buffer to a more permanent
symbol-table entry say about half the time.
With obstacks, you can work differently. Use one obstack for all symbol
names. As you read a symbol, grow the name in the obstack gradually.
When the name is complete, finalize it. Then, if the symbol exists already,
free the newly read name.
The way we do this is to take a large chunk, allocating memory from
low addresses. When you want to build a symbol in the chunk you just
add chars above the current "high water mark" in the chunk. When you
have finished adding chars, because you got to the end of the symbol,
you know how long the chars are, and you can create a new object.
Mostly the chars will not burst over the highest address of the chunk,
because you would typically expect a chunk to be (say) 100 times as
long as an average object.
In case that isn't clear, when we have enough chars to make up
the object, THEY ARE ALREADY CONTIGUOUS IN THE CHUNK (guaranteed)
so we just point to it where it lies. No moving of chars is
needed and this is the second win: potentially long strings need
never be explicitly shuffled. Once an object is formed, it does not
change its address during its lifetime.
When the chars burst over a chunk boundary, we allocate a larger
chunk, and then copy the partly formed object from the end of the old
chunk to the beginning of the new larger chunk. We then carry on
accreting characters to the end of the object as we normally would.
A special macro is provided to add a single char at a time to a
growing object. This allows the use of register variables, which
break the ordinary 'growth' macro.
Summary:
We allocate large chunks.
We carve out one object at a time from the current chunk.
Once carved, an object never moves.
We are free to append data of any size to the currently
growing object.
Exactly one object is growing in an obstack at any one time.
You can run one obstack per control block.
You may have as many control blocks as you dare.
Because of the way we do it, you can `unwind' an obstack
back to a previous state. (You may remove objects much
as you would with a stack.)
*/
/* Don't do the contents of this file more than once. */
#ifndef __OBSTACKS__
#define __OBSTACKS__
/* We use subtraction of (char *)0 instead of casting to int
because on word-addressable machines a simple cast to int
may ignore the byte-within-word field of the pointer. */
#ifndef __PTR_TO_INT
#define __PTR_TO_INT(P) ((P) - (char *)0)
#endif
#ifndef __INT_TO_PTR
#define __INT_TO_PTR(P) ((P) + (char *)0)
#endif
/* We need the type of the resulting object. In ANSI C it is ptrdiff_t
but in traditional C it is usually long. If we are in ANSI C and
don't already have ptrdiff_t get it. */
#if defined (__STDC__) && ! defined (offsetof)
#if defined (__GNUC__) && defined (IN_GCC)
/* On Next machine, the system's stddef.h screws up if included
after we have defined just ptrdiff_t, so include all of gstddef.h.
Otherwise, define just ptrdiff_t, which is all we need. */
#ifndef __NeXT__
#define __need_ptrdiff_t
#endif
/* While building GCC, the stddef.h that goes with GCC has this name. */
#include "gstddef.h"
#else
#include <stddef.h>
#endif
#endif
#ifdef __STDC__
#define PTR_INT_TYPE ptrdiff_t
#else
#define PTR_INT_TYPE long
#endif
struct _obstack_chunk /* Lives at front of each chunk. */
{
char *limit; /* 1 past end of this chunk */
struct _obstack_chunk *prev; /* address of prior chunk or NULL */
char contents[4]; /* objects begin here */
};
struct obstack /* control current object in current chunk */
{
long chunk_size; /* preferred size to allocate chunks in */
struct _obstack_chunk* chunk; /* address of current struct obstack_chunk */
char *object_base; /* address of object we are building */
char *next_free; /* where to add next char to current object */
char *chunk_limit; /* address of char after current chunk */
PTR_INT_TYPE temp; /* Temporary for some macros. */
int alignment_mask; /* Mask of alignment for each object. */
struct _obstack_chunk *(*chunkfun) (); /* User's fcn to allocate a chunk. */
void (*freefun) (); /* User's function to free a chunk. */
char *extra_arg; /* first arg for chunk alloc/dealloc funcs */
unsigned use_extra_arg:1; /* chunk alloc/dealloc funcs take extra arg */
unsigned maybe_empty_object:1;/* There is a possibility that the current
chunk contains a zero-length object. This
prevents freeing the chunk if we allocate
a bigger chunk to replace it. */
};
/* Declare the external functions we use; they are in obstack.c. */
#ifdef __STDC__
extern void _obstack_newchunk (struct obstack *, int);
extern void _obstack_free (struct obstack *, void *);
extern void _obstack_begin (struct obstack *, int, int,
void *(*) (), void (*) ());
extern void _obstack_begin_1 (struct obstack *, int, int,
void *(*) (), void (*) (), void *);
#else
extern void _obstack_newchunk ();
extern void _obstack_free ();
extern void _obstack_begin ();
extern void _obstack_begin_1 ();
#endif
#ifdef __STDC__
/* Do the function-declarations after the structs
but before defining the macros. */
void obstack_init (struct obstack *obstack);
void * obstack_alloc (struct obstack *obstack, int size);
void * obstack_copy (struct obstack *obstack, void *address, int size);
void * obstack_copy0 (struct obstack *obstack, void *address, int size);
void obstack_free (struct obstack *obstack, void *block);
void obstack_blank (struct obstack *obstack, int size);
void obstack_grow (struct obstack *obstack, void *data, int size);
void obstack_grow0 (struct obstack *obstack, void *data, int size);
void obstack_1grow (struct obstack *obstack, int data_char);
void obstack_ptr_grow (struct obstack *obstack, void *data);
void obstack_int_grow (struct obstack *obstack, int data);
void * obstack_finish (struct obstack *obstack);
int obstack_object_size (struct obstack *obstack);
int obstack_room (struct obstack *obstack);
void obstack_1grow_fast (struct obstack *obstack, int data_char);
void obstack_ptr_grow_fast (struct obstack *obstack, void *data);
void obstack_int_grow_fast (struct obstack *obstack, int data);
void obstack_blank_fast (struct obstack *obstack, int size);
void * obstack_base (struct obstack *obstack);
void * obstack_next_free (struct obstack *obstack);
int obstack_alignment_mask (struct obstack *obstack);
int obstack_chunk_size (struct obstack *obstack);
#endif /* __STDC__ */
/* Non-ANSI C cannot really support alternative functions for these macros,
so we do not declare them. */
/* Pointer to beginning of object being allocated or to be allocated next.
Note that this might not be the final address of the object
because a new chunk might be needed to hold the final size. */
#define obstack_base(h) ((h)->object_base)
/* Size for allocating ordinary chunks. */
#define obstack_chunk_size(h) ((h)->chunk_size)
/* Pointer to next byte not yet allocated in current chunk. */
#define obstack_next_free(h) ((h)->next_free)
/* Mask specifying low bits that should be clear in address of an object. */
#define obstack_alignment_mask(h) ((h)->alignment_mask)
#define obstack_init(h) \
_obstack_begin ((h), 0, 0, \
(void *(*) ()) obstack_chunk_alloc, (void (*) ()) obstack_chunk_free)
#define obstack_begin(h, size) \
_obstack_begin ((h), (size), 0, \
(void *(*) ()) obstack_chunk_alloc, (void (*) ()) obstack_chunk_free)
#define obstack_specify_allocation(h, size, alignment, chunkfun, freefun) \
_obstack_begin ((h), (size), (alignment), \
(void *(*) ()) (chunkfun), (void (*) ()) (freefun))
#define obstack_specify_allocation_with_arg(h, size, alignment, chunkfun, freefun, arg) \
_obstack_begin_1 ((h), (size), (alignment), \
(void *(*) ()) (chunkfun), (void (*) ()) (freefun), (arg))
#define obstack_1grow_fast(h,achar) (*((h)->next_free)++ = achar)
#define obstack_blank_fast(h,n) ((h)->next_free += (n))
#if defined (__GNUC__) && defined (__STDC__)
#if __GNUC__ < 2 || defined(NeXT)
#define __extension__
#endif
/* For GNU C, if not -traditional,
we can define these macros to compute all args only once
without using a global variable.
Also, we can avoid using the `temp' slot, to make faster code. */
#define obstack_object_size(OBSTACK) \
__extension__ \
({ struct obstack *__o = (OBSTACK); \
(unsigned) (__o->next_free - __o->object_base); })
#define obstack_room(OBSTACK) \
__extension__ \
({ struct obstack *__o = (OBSTACK); \
(unsigned) (__o->chunk_limit - __o->next_free); })
/* Note that the call to _obstack_newchunk is enclosed in (..., 0)
so that we can avoid having void expressions
in the arms of the conditional expression.
Casting the third operand to void was tried before,
but some compilers won't accept it. */
#define obstack_grow(OBSTACK,where,length) \
__extension__ \
({ struct obstack *__o = (OBSTACK); \
int __len = (length); \
((__o->next_free + __len > __o->chunk_limit) \
? (_obstack_newchunk (__o, __len), 0) : 0); \
bcopy (where, __o->next_free, __len); \
__o->next_free += __len; \
(void) 0; })
#define obstack_grow0(OBSTACK,where,length) \
__extension__ \
({ struct obstack *__o = (OBSTACK); \
int __len = (length); \
((__o->next_free + __len + 1 > __o->chunk_limit) \
? (_obstack_newchunk (__o, __len + 1), 0) : 0), \
bcopy (where, __o->next_free, __len), \
__o->next_free += __len, \
*(__o->next_free)++ = 0; \
(void) 0; })
#define obstack_1grow(OBSTACK,datum) \
__extension__ \
({ struct obstack *__o = (OBSTACK); \
((__o->next_free + 1 > __o->chunk_limit) \
? (_obstack_newchunk (__o, 1), 0) : 0), \
*(__o->next_free)++ = (datum); \
(void) 0; })
/* These assume that the obstack alignment is good enough for pointers or ints,
and that the data added so far to the current object
shares that much alignment. */
#define obstack_ptr_grow(OBSTACK,datum) \
__extension__ \
({ struct obstack *__o = (OBSTACK); \
((__o->next_free + sizeof (void *) > __o->chunk_limit) \
? (_obstack_newchunk (__o, sizeof (void *)), 0) : 0), \
*((void **)__o->next_free)++ = ((void *)datum); \
(void) 0; })
#define obstack_int_grow(OBSTACK,datum) \
__extension__ \
({ struct obstack *__o = (OBSTACK); \
((__o->next_free + sizeof (int) > __o->chunk_limit) \
? (_obstack_newchunk (__o, sizeof (int)), 0) : 0), \
*((int *)__o->next_free)++ = ((int)datum); \
(void) 0; })
#define obstack_ptr_grow_fast(h,aptr) (*((void **)(h)->next_free)++ = (void *)aptr)
#define obstack_int_grow_fast(h,aint) (*((int *)(h)->next_free)++ = (int)aint)
#define obstack_blank(OBSTACK,length) \
__extension__ \
({ struct obstack *__o = (OBSTACK); \
int __len = (length); \
((__o->chunk_limit - __o->next_free < __len) \
? (_obstack_newchunk (__o, __len), 0) : 0); \
__o->next_free += __len; \
(void) 0; })
#define obstack_alloc(OBSTACK,length) \
__extension__ \
({ struct obstack *__h = (OBSTACK); \
obstack_blank (__h, (length)); \
obstack_finish (__h); })
#define obstack_copy(OBSTACK,where,length) \
__extension__ \
({ struct obstack *__h = (OBSTACK); \
obstack_grow (__h, (where), (length)); \
obstack_finish (__h); })
#define obstack_copy0(OBSTACK,where,length) \
__extension__ \
({ struct obstack *__h = (OBSTACK); \
obstack_grow0 (__h, (where), (length)); \
obstack_finish (__h); })
/* The local variable is named __o1 to avoid a name conflict
when obstack_blank is called. */
#define obstack_finish(OBSTACK) \
__extension__ \
({ struct obstack *__o1 = (OBSTACK); \
void *value = (void *) __o1->object_base; \
if (__o1->next_free == value) \
__o1->maybe_empty_object = 1; \
__o1->next_free \
= __INT_TO_PTR ((__PTR_TO_INT (__o1->next_free)+__o1->alignment_mask)\
& ~ (__o1->alignment_mask)); \
((__o1->next_free - (char *)__o1->chunk \
> __o1->chunk_limit - (char *)__o1->chunk) \
? (__o1->next_free = __o1->chunk_limit) : 0); \
__o1->object_base = __o1->next_free; \
value; })
#define obstack_free(OBSTACK, OBJ) \
__extension__ \
({ struct obstack *__o = (OBSTACK); \
void *__obj = (OBJ); \
if (__obj > (void *)__o->chunk && __obj < (void *)__o->chunk_limit) \
__o->next_free = __o->object_base = __obj; \
else (obstack_free) (__o, __obj); })
#else /* not __GNUC__ or not __STDC__ */
#define obstack_object_size(h) \
(unsigned) ((h)->next_free - (h)->object_base)
#define obstack_room(h) \
(unsigned) ((h)->chunk_limit - (h)->next_free)
#define obstack_grow(h,where,length) \
( (h)->temp = (length), \
(((h)->next_free + (h)->temp > (h)->chunk_limit) \
? (_obstack_newchunk ((h), (h)->temp), 0) : 0), \
bcopy (where, (h)->next_free, (h)->temp), \
(h)->next_free += (h)->temp)
#define obstack_grow0(h,where,length) \
( (h)->temp = (length), \
(((h)->next_free + (h)->temp + 1 > (h)->chunk_limit) \
? (_obstack_newchunk ((h), (h)->temp + 1), 0) : 0), \
bcopy (where, (h)->next_free, (h)->temp), \
(h)->next_free += (h)->temp, \
*((h)->next_free)++ = 0)
#define obstack_1grow(h,datum) \
( (((h)->next_free + 1 > (h)->chunk_limit) \
? (_obstack_newchunk ((h), 1), 0) : 0), \
*((h)->next_free)++ = (datum))
#define obstack_ptr_grow(h,datum) \
( (((h)->next_free + sizeof (char *) > (h)->chunk_limit) \
? (_obstack_newchunk ((h), sizeof (char *)), 0) : 0), \
*((char **)(((h)->next_free+=sizeof(char *))-sizeof(char *))) = ((char *)datum))
#define obstack_int_grow(h,datum) \
( (((h)->next_free + sizeof (int) > (h)->chunk_limit) \
? (_obstack_newchunk ((h), sizeof (int)), 0) : 0), \
*((int *)(((h)->next_free+=sizeof(int))-sizeof(int))) = ((int)datum))
#define obstack_ptr_grow_fast(h,aptr) (*((char **)(h)->next_free)++ = (char *)aptr)
#define obstack_int_grow_fast(h,aint) (*((int *)(h)->next_free)++ = (int)aint)
#define obstack_blank(h,length) \
( (h)->temp = (length), \
(((h)->chunk_limit - (h)->next_free < (h)->temp) \
? (_obstack_newchunk ((h), (h)->temp), 0) : 0), \
(h)->next_free += (h)->temp)
#define obstack_alloc(h,length) \
(obstack_blank ((h), (length)), obstack_finish ((h)))
#define obstack_copy(h,where,length) \
(obstack_grow ((h), (where), (length)), obstack_finish ((h)))
#define obstack_copy0(h,where,length) \
(obstack_grow0 ((h), (where), (length)), obstack_finish ((h)))
#define obstack_finish(h) \
( ((h)->next_free == (h)->object_base \
? (((h)->maybe_empty_object = 1), 0) \
: 0), \
(h)->temp = __PTR_TO_INT ((h)->object_base), \
(h)->next_free \
= __INT_TO_PTR ((__PTR_TO_INT ((h)->next_free)+(h)->alignment_mask) \
& ~ ((h)->alignment_mask)), \
(((h)->next_free - (char *)(h)->chunk \
> (h)->chunk_limit - (char *)(h)->chunk) \
? ((h)->next_free = (h)->chunk_limit) : 0), \
(h)->object_base = (h)->next_free, \
__INT_TO_PTR ((h)->temp))
#ifdef __STDC__
#define obstack_free(h,obj) \
( (h)->temp = (char *)(obj) - (char *) (h)->chunk, \
(((h)->temp > 0 && (h)->temp < (h)->chunk_limit - (char *) (h)->chunk)\
? (int) ((h)->next_free = (h)->object_base \
= (h)->temp + (char *) (h)->chunk) \
: (((obstack_free) ((h), (h)->temp + (char *) (h)->chunk), 0), 0)))
#else
#define obstack_free(h,obj) \
( (h)->temp = (char *)(obj) - (char *) (h)->chunk, \
(((h)->temp > 0 && (h)->temp < (h)->chunk_limit - (char *) (h)->chunk)\
? (int) ((h)->next_free = (h)->object_base \
= (h)->temp + (char *) (h)->chunk) \
: (_obstack_free ((h), (h)->temp + (char *) (h)->chunk), 0)))
#endif
#endif /* not __GNUC__ or not __STDC__ */
#endif /* not __OBSTACKS__ */

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/* search.c - searching subroutines using dfa, kwset and regex for grep.
Copyright (C) 1992 Free Software Foundation, Inc.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
Written August 1992 by Mike Haertel. */
#include <ctype.h>
#ifdef STDC_HEADERS
#include <limits.h>
#include <stdlib.h>
#else
#define UCHAR_MAX 255
#include <sys/types.h>
extern char *malloc();
#endif
#ifdef HAVE_MEMCHR
#include <string.h>
#ifdef NEED_MEMORY_H
#include <memory.h>
#endif
#else
#ifdef __STDC__
extern void *memchr();
#else
extern char *memchr();
#endif
#endif
#if defined(HAVE_STRING_H) || defined(STDC_HEADERS)
#undef bcopy
#define bcopy(s, d, n) memcpy((d), (s), (n))
#endif
#if defined(isascii) && !defined(__FreeBSD__)
#define ISALNUM(C) (isascii(C) && isalnum(C))
#define ISUPPER(C) (isascii(C) && isupper(C))
#else
#define ISALNUM(C) isalnum((unsigned char)C)
#define ISUPPER(C) isupper((unsigned char)C)
#endif
#define TOLOWER(C) (ISUPPER(C) ? tolower((unsigned char)C) : (C))
#include "grep.h"
#include "dfa.h"
#include "kwset.h"
#include "gnuregex.h"
#define NCHAR (UCHAR_MAX + 1)
#if __STDC__
static void Gcompile(char *, size_t);
static void Ecompile(char *, size_t);
static char *EGexecute(char *, size_t, char **);
static void Fcompile(char *, size_t);
static char *Fexecute(char *, size_t, char **);
#else
static void Gcompile();
static void Ecompile();
static char *EGexecute();
static void Fcompile();
static char *Fexecute();
#endif
/* Here is the matchers vector for the main program. */
struct matcher matchers[] = {
{ "default", Gcompile, EGexecute },
{ "grep", Gcompile, EGexecute },
{ "ggrep", Gcompile, EGexecute },
{ "egrep", Ecompile, EGexecute },
{ "posix-egrep", Ecompile, EGexecute },
{ "gegrep", Ecompile, EGexecute },
{ "fgrep", Fcompile, Fexecute },
{ "gfgrep", Fcompile, Fexecute },
{ 0, 0, 0 },
};
/* For -w, we also consider _ to be word constituent. */
#define WCHAR(C) (ISALNUM(C) || (C) == '_')
/* DFA compiled regexp. */
static struct dfa dfa;
/* Regex compiled regexp. */
static struct re_pattern_buffer regex;
/* KWset compiled pattern. For Ecompile and Gcompile, we compile
a list of strings, at least one of which is known to occur in
any string matching the regexp. */
static kwset_t kwset;
/* Last compiled fixed string known to exactly match the regexp.
If kwsexec() returns < lastexact, then we don't need to
call the regexp matcher at all. */
static int lastexact;
void
dfaerror(mesg)
char *mesg;
{
fatal(mesg, 0);
}
static void
kwsinit()
{
static char trans[NCHAR];
int i;
if (match_icase)
for (i = 0; i < NCHAR; ++i)
trans[i] = TOLOWER(i);
if (!(kwset = kwsalloc(match_icase ? trans : (char *) 0)))
fatal("memory exhausted", 0);
}
/* If the DFA turns out to have some set of fixed strings one of
which must occur in the match, then we build a kwset matcher
to find those strings, and thus quickly filter out impossible
matches. */
static void
kwsmusts()
{
struct dfamust *dm;
char *err;
if (dfa.musts)
{
kwsinit();
/* First, we compile in the substrings known to be exact
matches. The kwset matcher will return the index
of the matching string that it chooses. */
for (dm = dfa.musts; dm; dm = dm->next)
{
if (!dm->exact)
continue;
++lastexact;
if ((err = kwsincr(kwset, dm->must, strlen(dm->must))) != 0)
fatal(err, 0);
}
/* Now, we compile the substrings that will require
the use of the regexp matcher. */
for (dm = dfa.musts; dm; dm = dm->next)
{
if (dm->exact)
continue;
if ((err = kwsincr(kwset, dm->must, strlen(dm->must))) != 0)
fatal(err, 0);
}
if ((err = kwsprep(kwset)) != 0)
fatal(err, 0);
}
}
static void
Gcompile(pattern, size)
char *pattern;
size_t size;
{
#ifdef __STDC__
const
#endif
char *err;
re_set_syntax(RE_SYNTAX_GREP | RE_HAT_LISTS_NOT_NEWLINE);
dfasyntax(RE_SYNTAX_GREP | RE_HAT_LISTS_NOT_NEWLINE, match_icase);
if ((err = re_compile_pattern(pattern, size, &regex)) != 0)
fatal(err, 0);
dfainit(&dfa);
/* In the match_words and match_lines cases, we use a different pattern
for the DFA matcher that will quickly throw out cases that won't work.
Then if DFA succeeds we do some hairy stuff using the regex matcher
to decide whether the match should really count. */
if (match_words || match_lines)
{
/* In the whole-word case, we use the pattern:
(^|[^A-Za-z_])(userpattern)([^A-Za-z_]|$).
In the whole-line case, we use the pattern:
^(userpattern)$.
BUG: Using [A-Za-z_] is locale-dependent! */
char *n = malloc(size + 50);
int i = 0;
strcpy(n, "");
if (match_lines)
strcpy(n, "^\\(");
if (match_words)
strcpy(n, "\\(^\\|[^0-9A-Za-z_]\\)\\(");
i = strlen(n);
bcopy(pattern, n + i, size);
i += size;
if (match_words)
strcpy(n + i, "\\)\\([^0-9A-Za-z_]\\|$\\)");
if (match_lines)
strcpy(n + i, "\\)$");
i += strlen(n + i);
dfacomp(n, i, &dfa, 1);
}
else
dfacomp(pattern, size, &dfa, 1);
kwsmusts();
}
static void
Ecompile(pattern, size)
char *pattern;
size_t size;
{
#ifdef __STDC__
const
#endif
char *err;
if (strcmp(matcher, "posix-egrep") == 0)
{
re_set_syntax(RE_SYNTAX_POSIX_EGREP);
dfasyntax(RE_SYNTAX_POSIX_EGREP, match_icase);
}
else
{
re_set_syntax(RE_SYNTAX_EGREP);
dfasyntax(RE_SYNTAX_EGREP, match_icase);
}
if ((err = re_compile_pattern(pattern, size, &regex)) != 0)
fatal(err, 0);
dfainit(&dfa);
/* In the match_words and match_lines cases, we use a different pattern
for the DFA matcher that will quickly throw out cases that won't work.
Then if DFA succeeds we do some hairy stuff using the regex matcher
to decide whether the match should really count. */
if (match_words || match_lines)
{
/* In the whole-word case, we use the pattern:
(^|[^A-Za-z_])(userpattern)([^A-Za-z_]|$).
In the whole-line case, we use the pattern:
^(userpattern)$.
BUG: Using [A-Za-z_] is locale-dependent! */
char *n = malloc(size + 50);
int i = 0;
strcpy(n, "");
if (match_lines)
strcpy(n, "^(");
if (match_words)
strcpy(n, "(^|[^0-9A-Za-z_])(");
i = strlen(n);
bcopy(pattern, n + i, size);
i += size;
if (match_words)
strcpy(n + i, ")([^0-9A-Za-z_]|$)");
if (match_lines)
strcpy(n + i, ")$");
i += strlen(n + i);
dfacomp(n, i, &dfa, 1);
}
else
dfacomp(pattern, size, &dfa, 1);
kwsmusts();
}
static char *
EGexecute(buf, size, endp)
char *buf;
size_t size;
char **endp;
{
register char *buflim, *beg, *end, save;
int backref, start, len;
struct kwsmatch kwsm;
static struct re_registers regs; /* This is static on account of a BRAIN-DEAD
Q@#%!# library interface in regex.c. */
buflim = buf + size;
for (beg = end = buf; end < buflim; beg = end + 1)
{
if (kwset)
{
/* Find a possible match using the KWset matcher. */
beg = kwsexec(kwset, beg, buflim - beg, &kwsm);
if (!beg)
goto failure;
/* Narrow down to the line containing the candidate, and
run it through DFA. */
end = memchr(beg, '\n', buflim - beg);
if (!end)
end = buflim;
while (beg > buf && beg[-1] != '\n')
--beg;
save = *end;
if (kwsm.index < lastexact)
goto success;
if (!dfaexec(&dfa, beg, end, 0, (int *) 0, &backref))
{
*end = save;
continue;
}
*end = save;
/* Successful, no backreferences encountered. */
if (!backref)
goto success;
}
else
{
/* No good fixed strings; start with DFA. */
save = *buflim;
beg = dfaexec(&dfa, beg, buflim, 0, (int *) 0, &backref);
*buflim = save;
if (!beg)
goto failure;
/* Narrow down to the line we've found. */
end = memchr(beg, '\n', buflim - beg);
if (!end)
end = buflim;
while (beg > buf && beg[-1] != '\n')
--beg;
/* Successful, no backreferences encountered! */
if (!backref)
goto success;
}
/* If we've made it to this point, this means DFA has seen
a probable match, and we need to run it through Regex. */
regex.not_eol = 0;
if ((start = re_search(&regex, beg, end - beg, 0, end - beg, &regs)) >= 0)
{
len = regs.end[0] - start;
if (!match_lines && !match_words || match_lines && len == end - beg)
goto success;
/* If -w, check if the match aligns with word boundaries.
We do this iteratively because:
(a) the line may contain more than one occurence of the pattern, and
(b) Several alternatives in the pattern might be valid at a given
point, and we may need to consider a shorter one to find a word
boundary. */
if (match_words)
while (start >= 0)
{
if ((start == 0 || !WCHAR(beg[start - 1]))
&& (len == end - beg || !WCHAR(beg[start + len])))
goto success;
if (len > 0)
{
/* Try a shorter length anchored at the same place. */
--len;
regex.not_eol = 1;
len = re_match(&regex, beg, start + len, start, &regs);
}
if (len <= 0)
{
/* Try looking further on. */
if (start == end - beg)
break;
++start;
regex.not_eol = 0;
start = re_search(&regex, beg, end - beg,
start, end - beg - start, &regs);
len = regs.end[0] - start;
}
}
}
}
failure:
return 0;
success:
*endp = end < buflim ? end + 1 : end;
return beg;
}
static void
Fcompile(pattern, size)
char *pattern;
size_t size;
{
char *beg, *lim, *err;
kwsinit();
beg = pattern;
do
{
for (lim = beg; lim < pattern + size && *lim != '\n'; ++lim)
;
if ((err = kwsincr(kwset, beg, lim - beg)) != 0)
fatal(err, 0);
if (lim < pattern + size)
++lim;
beg = lim;
}
while (beg < pattern + size);
if ((err = kwsprep(kwset)) != 0)
fatal(err, 0);
}
static char *
Fexecute(buf, size, endp)
char *buf;
size_t size;
char **endp;
{
register char *beg, *try, *end;
register size_t len;
struct kwsmatch kwsmatch;
for (beg = buf; beg <= buf + size; ++beg)
{
if (!(beg = kwsexec(kwset, beg, buf + size - beg, &kwsmatch)))
return 0;
len = kwsmatch.size[0];
if (match_lines)
{
if (beg > buf && beg[-1] != '\n')
continue;
if (beg + len < buf + size && beg[len] != '\n')
continue;
goto success;
}
else if (match_words)
for (try = beg; len && try;)
{
if (try > buf && WCHAR((unsigned char) try[-1]))
break;
if (try + len < buf + size && WCHAR((unsigned char) try[len]))
{
try = kwsexec(kwset, beg, --len, &kwsmatch);
len = kwsmatch.size[0];
}
else
goto success;
}
else
goto success;
}
return 0;
success:
if ((end = memchr(beg + len, '\n', (buf + size) - (beg + len))) != 0)
++end;
else
end = buf + size;
*endp = end;
while (beg > buf && beg[-1] != '\n')
--beg;
return beg;
}

24
gnu/usr.bin/grep/tests/check.sh Normal file
View File

@ -0,0 +1,24 @@
#! /bin/sh
# Regression test for GNU grep.
# Usage: regress.sh [testdir]
testdir=${1-tests}
failures=0
# The Khadafy test is brought to you by Scott Anderson . . .
./grep -E -f $testdir/khadafy.regexp $testdir/khadafy.lines > khadafy.out
if cmp $testdir/khadafy.lines khadafy.out
then
:
else
echo Khadafy test failed -- output left on khadafy.out
failures=1
fi
# . . . and the following by Henry Spencer.
${AWK-awk} -F: -f $testdir/scriptgen.awk $testdir/spencer.tests > tmp.script
sh tmp.script && exit $failures
exit 1

10
gnu/usr.bin/grep/tests/scriptgen.awk Normal file
View File

@ -0,0 +1,10 @@
BEGIN { print "failures=0"; }
$0 !~ /^#/ && NF == 3 {
print "echo '" $3 "' | ./grep -E -e '" $2 "' > /dev/null 2>&1";
print "if [ $? != " $1 " ]"
print "then"
printf "\techo Spencer test \\#%d failed\n", ++n
print "\tfailures=1"
print "fi"
}
END { print "exit $failures"; }

122
gnu/usr.bin/grep/tests/spencer.tests Normal file
View File

@ -0,0 +1,122 @@
0:abc:abc
1:abc:xbc
1:abc:axc
1:abc:abx
0:abc:xabcy
0:abc:ababc
0:ab*c:abc
0:ab*bc:abc
0:ab*bc:abbc
0:ab*bc:abbbbc
0:ab+bc:abbc
1:ab+bc:abc
1:ab+bc:abq
0:ab+bc:abbbbc
0:ab?bc:abbc
0:ab?bc:abc
1:ab?bc:abbbbc
0:ab?c:abc
0:^abc$:abc
1:^abc$:abcc
0:^abc:abcc
1:^abc$:aabc
0:abc$:aabc
0:^:abc
0:$:abc
0:a.c:abc
0:a.c:axc
0:a.*c:axyzc
1:a.*c:axyzd
1:a[bc]d:abc
0:a[bc]d:abd
1:a[b-d]e:abd
0:a[b-d]e:ace
0:a[b-d]:aac
0:a[-b]:a-
0:a[b-]:a-
2:a[b-a]:-
2:a[]b:-
2:a[:-
0:a]:a]
0:a[]]b:a]b
0:a[^bc]d:aed
1:a[^bc]d:abd
0:a[^-b]c:adc
1:a[^-b]c:a-c
1:a[^]b]c:a]c
0:a[^]b]c:adc
0:ab|cd:abc
0:ab|cd:abcd
0:()ef:def
0:()*:-
1:*a:-
0:^*:-
0:$*:-
1:(*)b:-
1:$b:b
2:a\:-
0:a\(b:a(b
0:a\(*b:ab
0:a\(*b:a((b
1:a\x:a\x
2:abc):-
2:(abc:-
0:((a)):abc
0:(a)b(c):abc
0:a+b+c:aabbabc
0:a**:-
0:a*?:-
0:(a*)*:-
0:(a*)+:-
0:(a|)*:-
0:(a*|b)*:-
0:(a+|b)*:ab
0:(a+|b)+:ab
0:(a+|b)?:ab
0:[^ab]*:cde
0:(^)*:-
0:(ab|)*:-
2:)(:-
1:abc:
1:abc:
0:a*:
0:([abc])*d:abbbcd
0:([abc])*bcd:abcd
0:a|b|c|d|e:e
0:(a|b|c|d|e)f:ef
0:((a*|b))*:-
0:abcd*efg:abcdefg
0:ab*:xabyabbbz
0:ab*:xayabbbz
0:(ab|cd)e:abcde
0:[abhgefdc]ij:hij
1:^(ab|cd)e:abcde
0:(abc|)ef:abcdef
0:(a|b)c*d:abcd
0:(ab|ab*)bc:abc
0:a([bc]*)c*:abc
0:a([bc]*)(c*d):abcd
0:a([bc]+)(c*d):abcd
0:a([bc]*)(c+d):abcd
0:a[bcd]*dcdcde:adcdcde
1:a[bcd]+dcdcde:adcdcde
0:(ab|a)b*c:abc
0:((a)(b)c)(d):abcd
0:[A-Za-z_][A-Za-z0-9_]*:alpha
0:^a(bc+|b[eh])g|.h$:abh
0:(bc+d$|ef*g.|h?i(j|k)):effgz
0:(bc+d$|ef*g.|h?i(j|k)):ij
1:(bc+d$|ef*g.|h?i(j|k)):effg
1:(bc+d$|ef*g.|h?i(j|k)):bcdd
0:(bc+d$|ef*g.|h?i(j|k)):reffgz
1:((((((((((a)))))))))):-
0:(((((((((a))))))))):a
1:multiple words of text:uh-uh
0:multiple words:multiple words, yeah
0:(.*)c(.*):abcde
1:\((.*),:(.*)\)
1:[k]:ab
0:abcd:abcd
0:a(bc)d:abcd
0:a[-]?c:ac
0:(....).*\1:beriberi