vendor/tre/0.8.0

5 files changed, 1861 insertions, 0 deletions

diff --git a/src/.deps/agrep-agrep.Po b/src/.deps/agrep-agrep.Po
new file mode 100644
index 0000000000000..9ce06a81ea45b
--- /dev/null
+++ b/src/.deps/agrep-agrep.Po
@@ -0,0 +1 @@
+# dummy
diff --git a/src/Makefile b/src/Makefile
new file mode 100644
index 0000000000000..02abebc682edc
--- /dev/null
+++ b/src/Makefile
@@ -0,0 +1,511 @@
+# Makefile.in generated by automake 1.10.1 from Makefile.am.
+# src/Makefile.  Generated from Makefile.in by configure.
+
+# Copyright (C) 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002,
+# 2003, 2004, 2005, 2006, 2007, 2008  Free Software Foundation, Inc.
+# This Makefile.in is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY, to the extent permitted by law; without
+# even the implied warranty of MERCHANTABILITY or FITNESS FOR A
+# PARTICULAR PURPOSE.
+
+
+
+
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+transform = $(program_transform_name)
+NORMAL_INSTALL = :
+PRE_INSTALL = :
+POST_INSTALL = :
+NORMAL_UNINSTALL = :
+PRE_UNINSTALL = :
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+host_triplet = x86_64-unknown-freebsd8.0
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+	$(top_builddir)/lib/tre-config.h
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+	$(am__DEPENDENCIES_1)
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+
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+	install-html-am install-info install-info-am install-man \
+	install-pdf install-pdf-am install-ps install-ps-am \
+	install-strip installcheck installcheck-am installdirs \
+	maintainer-clean maintainer-clean-generic mostlyclean \
+	mostlyclean-compile mostlyclean-generic mostlyclean-libtool \
+	pdf pdf-am ps ps-am tags uninstall uninstall-am \
+	uninstall-binPROGRAMS
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new file mode 100644
index 0000000000000..9635404165cf9
--- /dev/null
+++ b/src/Makefile.am
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+bin_PROGRAMS = agrep
+
+agrep_SOURCES = agrep.c
+agrep_LDADD = ../lib/libtre.la $(LTLIBINTL)
+agrep_CFLAGS = -DLOCALEDIR=\"$(localedir)\"
+if TRE_PROFILE
+agrep_LDFLAGS = -static
+endif
+endif
diff --git a/src/Makefile.in b/src/Makefile.in
new file mode 100644
index 0000000000000..584db14626224
--- /dev/null
+++ b/src/Makefile.in
@@ -0,0 +1,511 @@
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+
+# Copyright (C) 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002,
+# 2003, 2004, 2005, 2006, 2007, 2008  Free Software Foundation, Inc.
+# This Makefile.in is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY, to the extent permitted by law; without
+# even the implied warranty of MERCHANTABILITY or FITNESS FOR A
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+
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+	@echo "This command is intended for maintainers to use"
+	@echo "it deletes files that may require special tools to rebuild."
+clean: clean-am
+
+clean-am: clean-binPROGRAMS clean-generic clean-libtool mostlyclean-am
+
+distclean: distclean-am
+	-rm -rf ./$(DEPDIR)
+	-rm -f Makefile
+distclean-am: clean-am distclean-compile distclean-generic \
+	distclean-tags
+
+dvi: dvi-am
+
+dvi-am:
+
+html: html-am
+
+info: info-am
+
+info-am:
+
+install-data-am:
+
+install-dvi: install-dvi-am
+
+install-exec-am: install-binPROGRAMS
+
+install-html: install-html-am
+
+install-info: install-info-am
+
+install-man:
+
+install-pdf: install-pdf-am
+
+install-ps: install-ps-am
+
+installcheck-am:
+
+maintainer-clean: maintainer-clean-am
+	-rm -rf ./$(DEPDIR)
+	-rm -f Makefile
+maintainer-clean-am: distclean-am maintainer-clean-generic
+
+mostlyclean: mostlyclean-am
+
+mostlyclean-am: mostlyclean-compile mostlyclean-generic \
+	mostlyclean-libtool
+
+pdf: pdf-am
+
+pdf-am:
+
+ps: ps-am
+
+ps-am:
+
+uninstall-am: uninstall-binPROGRAMS
+
+.MAKE: install-am install-strip
+
+.PHONY: CTAGS GTAGS all all-am check check-am clean clean-binPROGRAMS \
+	clean-generic clean-libtool ctags distclean distclean-compile \
+	distclean-generic distclean-libtool distclean-tags distdir dvi \
+	dvi-am html html-am info info-am install install-am \
+	install-binPROGRAMS install-data install-data-am install-dvi \
+	install-dvi-am install-exec install-exec-am install-html \
+	install-html-am install-info install-info-am install-man \
+	install-pdf install-pdf-am install-ps install-ps-am \
+	install-strip installcheck installcheck-am installdirs \
+	maintainer-clean maintainer-clean-generic mostlyclean \
+	mostlyclean-compile mostlyclean-generic mostlyclean-libtool \
+	pdf pdf-am ps ps-am tags uninstall uninstall-am \
+	uninstall-binPROGRAMS
+
+# Tell versions [3.59,3.63) of GNU make to not export all variables.
+# Otherwise a system limit (for SysV at least) may be exceeded.
+.NOEXPORT:
diff --git a/src/agrep.c b/src/agrep.c
new file mode 100644
index 0000000000000..55d2b05f0853f
--- /dev/null
+++ b/src/agrep.c
@@ -0,0 +1,823 @@
+/*
+  agrep.c - Approximate grep
+
+  This software is released under a BSD-style license.
+  See the file LICENSE for details and copyright.
+
+*/
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif /* HAVE_CONFIG_H */
+#include <stdio.h>
+#include <stdlib.h>
+#include <locale.h>
+#include <string.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <assert.h>
+#include <limits.h>
+#include <unistd.h>
+#ifdef HAVE_GETOPT_H
+#include <getopt.h>
+#endif /* HAVE_GETOPT_H */
+#include "regex.h"
+
+#ifdef HAVE_GETTEXT
+#include <libintl.h>
+#else
+#define gettext(s) s
+#define bindtextdomain(p, d)
+#define textdomain(p)
+#endif
+
+#define _(String) gettext(String)
+
+#undef MAX
+#undef MIN
+#define MAX(a, b) (((a) >= (b)) ? (a) : (b))
+#define MIN(a, b) (((a) <= (b)) ? (a) : (b))
+
+/* Short options. */
+static char const short_options[] =
+"cd:e:hiklnqsvwyBD:E:HI:MS:V0123456789-:";
+
+static int show_help;
+char *program_name;
+
+#ifdef HAVE_GETOPT_LONG
+/* Long options that have no corresponding short equivalents. */
+enum {
+  COLOR_OPTION = CHAR_MAX + 1,
+  SHOW_POSITION_OPTION
+};
+
+/* Long option equivalences. */
+static struct option const long_options[] =
+{
+  {"best-match", no_argument, NULL, 'B'},
+  {"color", no_argument, NULL, COLOR_OPTION},
+  {"colour", no_argument, NULL, COLOR_OPTION},
+  {"count", no_argument, NULL, 'c'},
+  {"delete-cost", required_argument, NULL, 'D'},
+  {"delimiter", no_argument, NULL, 'd'},
+  {"delimiter-after", no_argument, NULL, 'M'},
+  {"files-with-matches", no_argument, NULL, 'l'},
+  {"help", no_argument, &show_help, 1},
+  {"ignore-case", no_argument, NULL, 'i'},
+  {"insert-cost", required_argument, NULL, 'I'},
+  {"invert-match", no_argument, NULL, 'v'},
+  {"line-number", no_argument, NULL, 'n'},
+  {"literal", no_argument, NULL, 'k'},
+  {"max-errors", required_argument, NULL, 'E'},
+  {"no-filename", no_argument, NULL, 'h'},
+  {"nothing", no_argument, NULL, 'y'},
+  {"quiet", no_argument, NULL, 'q'},
+  {"record-number", no_argument, NULL, 'n'},
+  {"regexp", required_argument, NULL, 'e'},
+  {"show-cost", no_argument, NULL, 's'},
+  {"show-position", no_argument, NULL, SHOW_POSITION_OPTION},
+  {"silent", no_argument, NULL, 'q'},
+  {"substitute-cost", required_argument, NULL, 'S'},
+  {"version", no_argument, NULL, 'V'},
+  {"with-filename", no_argument, NULL, 'H'},
+  {"word-regexp", no_argument, NULL, 'w'},
+  {0, 0, 0, 0}
+};
+#endif /* HAVE_GETOPT_LONG */
+
+static void
+tre_agrep_usage(int status)
+{
+  if (status != 0)
+    {
+      fprintf(stderr, _("Usage: %s [OPTION]... PATTERN [FILE]...\n"),
+	      program_name);
+      fprintf(stderr, _("Try `%s --help' for more information.\n"),
+              program_name);
+    }
+  else
+    {
+      printf(_("Usage: %s [OPTION]... PATTERN [FILE]...\n"), program_name);
+      printf(_("\
+Searches for approximate matches of PATTERN in each FILE or standard input.\n\
+Example: `%s -2 optimize foo.txt' outputs all lines in file `foo.txt' that\n\
+match \"optimize\" within two errors.  E.g. lines which contain \"optimise\",\n\
+\"optmise\", and \"opitmize\" all match.\n"), program_name);
+      printf("\n");
+      printf(_("\
+Regexp selection and interpretation:\n\
+  -e, --regexp=PATTERN	    use PATTERN as a regular expression\n\
+  -i, --ignore-case	    ignore case distinctions\n\
+  -k, --literal		    PATTERN is a literal string\n\
+  -w, --word-regexp	    force PATTERN to match only whole words\n\
+\n\
+Approximate matching settings:\n\
+  -D, --delete-cost=NUM	    set cost of missing characters\n\
+  -I, --insert-cost=NUM	    set cost of extra characters\n\
+  -S, --substitute-cost=NUM set cost of wrong characters\n\
+  -E, --max-errors=NUM	    select records that have at most NUM errors\n\
+  -#			    select records that have at most # errors (# is a\n\
+			    digit between 0 and 9)\n\
+\n\
+Miscellaneous:\n\
+  -d, --delimiter=PATTERN   set the record delimiter regular expression\n\
+  -v, --invert-match	    select non-matching records\n\
+  -V, --version		    print version information and exit\n\
+  -y, --nothing		    does nothing (for compatibility with the non-free\n\
+			    agrep program)\n\
+      --help		    display this help and exit\n\
+\n\
+Output control:\n\
+  -B, --best-match	    only output records with least errors\n\
+  -c, --count		    only print a count of matching records per FILE\n\
+  -h, --no-filename	    suppress the prefixing filename on output\n\
+  -H, --with-filename	    print the filename for each match\n\
+  -l, --files-with-matches  only print FILE names containing matches\n\
+  -M, --delimiter-after     print record delimiter after record if -d is used\n\
+  -n, --record-number	    print record number with output\n\
+      --line-number         same as -n\n\
+  -q, --quiet, --silent	    suppress all normal output\n\
+  -s, --show-cost	    print match cost with output\n\
+      --colour, --color     use markers to distinguish the matching \
+strings\n\
+      --show-position       prefix each output record with start and end\n\
+                            position of the first match within the record\n"));
+      printf("\n");
+      printf(_("\
+With no FILE, or when FILE is -, reads standard input.  If less than two\n\
+FILEs are given, -h is assumed.  Exit status is 0 if a match is found, 1 for\n\
+no match, and 2 if there were errors.  If -E or -# is not specified, only\n\
+exact matches are selected.\n"));
+      printf("\n");
+      printf(_("\
+PATTERN is a POSIX extended regular expression (ERE) with the TRE extensions.\n\
+See tre(7) for a complete description.\n"));
+      printf("\n");
+      printf(_("Report bugs to: "));
+      printf("%s.\n", PACKAGE_BUGREPORT);
+    }
+  exit(status);
+}
+
+static regex_t preg;	  /* Compiled pattern to search for. */
+static regex_t delim;	  /* Compiled record delimiter pattern. */
+
+#define INITIAL_BUF_SIZE 10240	/* Initial size of the buffer. */
+static char *buf;	   /* Buffer for scanning text. */
+static int buf_size;	   /* Current size of the buffer. */
+static int data_len;	   /* Amount of data in the buffer. */
+static char *record;	   /* Start of current record. */
+static char *next_record;  /* Start of next record. */
+static int record_len;	   /* Length of current record. */
+static int delim_len;      /* Length of delimiter before record. */
+static int next_delim_len; /* Length of delimiter after record. */
+static int delim_after = 1;/* If true, print the delimiter after the record. */
+static int at_eof;
+static int have_matches;   /* If true, matches have been found. */
+
+static int invert_match;   /* Show only non-matching records. */
+static int print_filename; /* Output filename. */
+static int print_recnum;   /* Output record number. */
+static int print_cost;	   /* Output match cost. */
+static int count_matches;  /* Count matching records. */
+static int list_files;	   /* List matching files. */
+static int color_option;   /* Highlight matches. */
+static int print_position;  /* Show start and end offsets for matches. */
+
+static int best_match;	     /* Output only best matches. */
+static int best_cost;	     /* Best match cost found so far. */
+static int be_silent;	     /* Never output anything */
+
+static regaparams_t match_params;
+
+/* The color string used with the --color option.  If set, the
+   environment variable GREP_COLOR overrides this default value. */
+static const char *highlight = "01;31";
+
+/* Sets `record' to the next complete record from file `fd', and `record_len'
+   to the length of the record.	 Returns 1 when there are no more records,
+   0 otherwise. */
+static inline int
+tre_agrep_get_next_record(int fd, const char *filename)
+{
+  if (at_eof)
+    return 1;
+
+  while (1)
+    {
+      int errcode;
+      regmatch_t pmatch[1];
+
+      if (next_record == NULL)
+	{
+	  int r;
+	  int read_size = buf_size - data_len;
+
+	  if (read_size <= 0)
+	    {
+	      /* The buffer is full and no record delimiter found yet,
+		 we need to grow the buffer.  We double the size to
+		 avoid rescanning the data too many times when the
+		 records are very large. */
+	      buf_size *= 2;
+	      buf = realloc(buf, buf_size);
+	      if (buf == NULL)
+		{
+		  fprintf(stderr, "%s: %s\n", program_name, _("Out of memory"));
+		  exit(2);
+		}
+	      read_size = buf_size - data_len;
+	    }
+
+	  r = read(fd, buf + data_len, read_size);
+	  if (r < 0)
+	    {
+	      /* Read error. */
+	      char *err;
+	      if (errno == EINTR)
+		continue;
+	      err = strerror(errno);
+	      fprintf(stderr, "%s: ", program_name);
+	      fprintf(stderr, _("Error reading from %s: %s\n"), filename, err);
+	      return 1;
+	    }
+
+	  if (r == 0)
+	    {
+	      /* End of file.  Return the last record. */
+	      record = buf;
+	      record_len = data_len;
+	      at_eof = 1;
+	      /* The empty string after a trailing delimiter is not considered
+		 to be a record. */
+	      if (record_len == 0)
+		return 1;
+	      return 0;
+	    }
+	  data_len += r;
+	  next_record = buf;
+	}
+
+      /* Find the next record delimiter. */
+      errcode = tre_regnexec(&delim, next_record, data_len - (next_record - buf),
+			 1, pmatch, 0);
+
+
+      switch (errcode)
+	{
+	case REG_OK:
+	  /* Record delimiter found, now we know how long the current
+	     record is. */
+	  record = next_record;
+	  record_len = pmatch[0].rm_so;
+	  delim_len = next_delim_len;
+
+	  next_delim_len = pmatch[0].rm_eo - pmatch[0].rm_so;
+	  next_record = next_record + pmatch[0].rm_eo;
+	  return 0;
+	  break;
+
+	case REG_NOMATCH:
+	  if (next_record == buf)
+	    {
+	      next_record = NULL;
+	      continue;
+	    }
+
+	  /* Move the data to start of the buffer and read more
+	     data. */
+	  memmove(buf, next_record, buf + data_len - next_record);
+	  data_len = buf + data_len - next_record;
+	  next_record = NULL;
+	  continue;
+	  break;
+
+	case REG_ESPACE:
+	  fprintf(stderr, "%s: %s\n", program_name, _("Out of memory"));
+	  exit(2);
+	  break;
+
+	default:
+	  assert(0);
+	  break;
+	}
+    }
+}
+
+
+static int
+tre_agrep_handle_file(const char *filename)
+{
+  int fd;
+  int count = 0;
+  int recnum = 0;
+
+  /* Allocate the initial buffer. */
+  if (buf == NULL)
+    {
+      buf = malloc(INITIAL_BUF_SIZE);
+      if (buf == NULL)
+	{
+	  fprintf(stderr, "%s: %s\n", program_name, _("Out of memory"));
+	  exit(2);
+	}
+      buf_size = INITIAL_BUF_SIZE;
+    }
+
+  /* Reset read buffer state. */
+  next_record = NULL;
+  data_len = 0;
+
+  if (!filename || strcmp(filename, "-") == 0)
+    {
+      if (best_match)
+	{
+	  fprintf(stderr, "%s: %s\n", program_name,
+		  _("Cannot use -B when reading from standard input."));
+	  return 2;
+	}
+      fd = 0;
+      filename = _("(standard input)");
+    }
+  else
+    {
+      fd = open(filename, O_RDONLY);
+    }
+
+  if (fd < 0)
+    {
+      fprintf(stderr, "%s: %s: %s\n", program_name, filename, strerror(errno));
+      return 1;
+    }
+
+
+  /* Go through all records and output the matching ones, or the non-matching
+     ones if `invert_match' is true. */
+  at_eof = 0;
+  while (!tre_agrep_get_next_record(fd, filename))
+    {
+      int errcode;
+      regamatch_t match;
+      regmatch_t pmatch[1];
+      recnum++;
+      memset(&match, 0, sizeof(match));
+      if (best_match)
+	match_params.max_cost = best_cost;
+      if (color_option || print_position)
+	{
+	  match.pmatch = pmatch;
+	  match.nmatch = 1;
+	}
+
+      /* Stop searching for better matches if an exact match is found. */
+      if (best_match == 1 && best_cost == 0)
+	break;
+
+      /* See if the record matches. */
+      errcode = tre_reganexec(&preg, record, record_len, &match, match_params, 0);
+      if ((!invert_match && errcode == REG_OK)
+	  || (invert_match && errcode == REG_NOMATCH))
+	{
+	  if (be_silent)
+	    exit(0);
+
+	  count++;
+	  have_matches = 1;
+	  if (best_match)
+	    {
+	      if (best_match == 1)
+		{
+		  /* First best match pass. */
+		  if (match.cost < best_cost)
+		    best_cost = match.cost;
+		  continue;
+		}
+	      /* Second best match pass. */
+	      if (match.cost > best_cost)
+		continue;
+	    }
+
+	  if (list_files)
+	    {
+	      printf("%s\n", filename);
+	      break;
+	    }
+	  else if (!count_matches)
+	    {
+	      if (print_filename)
+		printf("%s:", filename);
+	      if (print_recnum)
+		printf("%d:", recnum);
+	      if (print_cost)
+		printf("%d:", match.cost);
+	      if (print_position)
+		printf("%d-%d:",
+		       invert_match ? 0 : (int)pmatch[0].rm_so,
+		       invert_match ? record_len : (int)pmatch[0].rm_eo);
+
+	      /* Adjust record boundaries so we print the delimiter
+		 before or after the record. */
+	      if (delim_after)
+		{
+		  record_len += next_delim_len;
+		}
+	      else
+		{
+		  record -= delim_len;
+		  record_len += delim_len;
+		  pmatch[0].rm_so += delim_len;
+		  pmatch[0].rm_eo += delim_len;
+		}
+
+	      if (color_option && !invert_match)
+		{
+		  printf("%.*s", (int)pmatch[0].rm_so, record);
+		  printf("\33[%sm", highlight);
+		  printf("%.*s", (int)(pmatch[0].rm_eo - pmatch[0].rm_so),
+			 record + pmatch[0].rm_so);
+		  fputs("\33[00m", stdout);
+		  printf("%.*s", (int)(record_len - pmatch[0].rm_eo),
+			 record + pmatch[0].rm_eo);
+		}
+	      else
+		{
+		  printf("%.*s", record_len, record);
+		}
+	    }
+	}
+    }
+
+  if (count_matches && !best_match && !be_silent)
+    {
+      if (print_filename)
+	printf("%s:", filename);
+      printf("%d\n", count);
+    }
+
+  if (fd)
+    close(fd);
+
+  return 0;
+}
+
+
+
+int
+main(int argc, char **argv)
+{
+  int c, errcode;
+  int comp_flags = REG_EXTENDED;
+  char *tmp_str;
+  char *regexp = NULL;
+  const char *delim_regexp = "\n";
+  int word_regexp = 0;
+  int literal_string = 0;
+  int max_cost_set = 0;
+
+  setlocale (LC_ALL, "");
+  bindtextdomain (PACKAGE, LOCALEDIR);
+  textdomain (PACKAGE);
+
+  /* Get the program name without the path (for error messages etc). */
+  program_name = argv[0];
+  if (program_name)
+    {
+      tmp_str = strrchr(program_name, '/');
+      if (tmp_str)
+	program_name = tmp_str + 1;
+    }
+
+  /* Defaults. */
+  print_filename = -1;
+  print_cost = 0;
+  be_silent = 0;
+  tre_regaparams_default(&match_params);
+  match_params.max_cost = 0;
+
+  /* Parse command line options. */
+  while (1)
+    {
+#ifdef HAVE_GETOPT_LONG
+      c = getopt_long(argc, argv, short_options, long_options, NULL);
+#else /* !HAVE_GETOPT_LONG */
+      c = getopt(argc, argv, short_options);
+#endif /* !HAVE_GETOPT_LONG */
+      if (c == -1)
+	break;
+
+      switch (c)
+	{
+	case 'c':
+	  /* Count number of matching records. */
+	  count_matches = 1;
+	  break;
+	case 'd':
+	  /* Set record delimiter regexp. */
+	  delim_regexp = optarg;
+	  if (delim_after == 1)
+	    delim_after = 0;
+	  break;
+	case 'e':
+	  /* Regexp to use. */
+	  regexp = optarg;
+	  break;
+	case 'h':
+	  /* Don't prefix filename on output if there are multiple files. */
+	  print_filename = 0;
+	  break;
+	case 'i':
+	  /* Ignore case. */
+	  comp_flags |= REG_ICASE;
+	  break;
+	case 'k':
+	  /* The pattern is a literal string. */
+	  literal_string = 1;
+	  break;
+	case 'l':
+	  /* Only print files that contain matches. */
+	  list_files = 1;
+	  break;
+	case 'n':
+	  /* Print record number of matching record. */
+	  print_recnum = 1;
+	  break;
+	case 'q':
+	  be_silent = 1;
+	  break;
+	case 's':
+	  /* Print match cost of matching record. */
+	  print_cost = 1;
+	  break;
+	case 'v':
+	  /* Select non-matching records. */
+	  invert_match = 1;
+	  break;
+	case 'w':
+	  /* Match only whole words. */
+	  word_regexp = 1;
+	  break;
+	case 'y':
+	  /* Compatibility option, does nothing. */
+	  break;
+	case 'B':
+	  /* Select only the records which have the best match. */
+	  best_match = 1;
+	  break;
+	case 'D':
+	  /* Set the cost of a deletion. */
+	  match_params.cost_del = atoi(optarg);
+	  break;
+	case 'E':
+	  /* Set the maximum number of errors allowed for a record to match. */
+	  match_params.max_cost = atoi(optarg);
+	  max_cost_set = 1;
+	  break;
+	case 'H':
+	  /* Always print filename prefix on output. */
+	  print_filename = 1;
+	  break;
+	case 'I':
+	  /* Set the cost of an insertion. */
+	  match_params.cost_ins = atoi(optarg);
+	  break;
+	case 'M':
+	  /* Print delimiters after matches instead of before. */
+	  delim_after = 2;
+	  break;
+	case 'S':
+	  /* Set the cost of a substitution. */
+	  match_params.cost_subst = atoi(optarg);
+	  break;
+	case 'V':
+	  {
+	    /* Print version string and exit. */
+	    char *version;
+	    tre_config(TRE_CONFIG_VERSION, &version);
+	    printf("%s (TRE agrep) %s\n\n", program_name, version);
+	    printf(_("\
+Copyright (c) 2001-2009 Ville Laurikari <vl@iki.fi>.\n"));
+	    printf("\n");
+	    exit(0);
+	    break;
+	  }
+	case '?':
+	  /* Ambiguous match or extraneous parameter. */
+	  break;
+
+	case '-':
+	  /* Emulate some long options on systems which don't
+	     have getopt_long. */
+	  if (strcmp(optarg, "color") == 0
+	      || strcmp(optarg, "colour") == 0)
+	    color_option = 1;
+	  else if (strcmp(optarg, "show-position") == 0)
+	    print_position = 1;
+	  else if (strcmp(optarg, "help") == 0)
+	    show_help = 1;
+	  else
+	    {
+	      fprintf(stderr, _("%s: invalid option --%s\n"),
+		      program_name, optarg);
+	      exit(2);
+	    }
+	  break;
+
+#ifdef HAVE_GETOPT_LONG
+	case COLOR_OPTION:
+	  color_option = 1;
+	  break;
+	case SHOW_POSITION_OPTION:
+	  print_position = 1;
+	  break;
+#endif /* HAVE_GETOPT_LONG */
+	case 0:
+	  /* Long options without corresponding short options. */
+	  break;
+
+	default:
+	  if (c >= '0' && c <= '9')
+	    match_params.max_cost = c - '0';
+	  else
+	    tre_agrep_usage(2);
+	  max_cost_set = 1;
+	  break;
+	}
+    }
+
+  if (show_help)
+    tre_agrep_usage(0);
+
+  if (color_option)
+    {
+      char *user_highlight = getenv("GREP_COLOR");
+      if (user_highlight && *user_highlight != '\0')
+	highlight = user_highlight;
+    }
+
+  /* Get the pattern. */
+  if (regexp == NULL)
+    {
+      if (optind >= argc)
+	tre_agrep_usage(2);
+      regexp = argv[optind++];
+    }
+
+  /* If -k is specified, make the regexp literal.  This uses
+     the \Q and \E extensions.	If the string already contains
+     occurrences of \E, we need to handle them separately.  This is a
+     pain, but can't really be avoided if we want to create a regexp
+     which works together with -w (see below). */
+  if (literal_string)
+    {
+      char *next_pos = regexp;
+      char *new_re, *new_re_end;
+      int n = 0;
+      int len;
+
+      next_pos = regexp;
+      while (next_pos)
+	{
+	  next_pos = strstr(next_pos, "\\E");
+	  if (next_pos)
+	    {
+	      n++;
+	      next_pos += 2;
+	    }
+	}
+
+      len = strlen(regexp);
+      new_re = malloc(len + 5 + n * 7);
+      if (!new_re)
+	{
+	  fprintf(stderr, "%s: %s\n", program_name, _("Out of memory"));
+	  return 2;
+	}
+
+      next_pos = regexp;
+      new_re_end = new_re;
+      strcpy(new_re_end, "\\Q");
+      new_re_end += 2;
+      while (next_pos)
+	{
+	  char *start = next_pos;
+	  next_pos = strstr(next_pos, "\\E");
+	  if (next_pos)
+	    {
+	      strncpy(new_re_end, start, next_pos - start);
+	      new_re_end += next_pos - start;
+	      strcpy(new_re_end, "\\E\\\\E\\Q");
+	      new_re_end += 7;
+	      next_pos += 2;
+	    }
+	  else
+	    {
+	      strcpy(new_re_end, start);
+	      new_re_end += strlen(start);
+	    }
+	}
+      strcpy(new_re_end, "\\E");
+      regexp = new_re;
+    }
+
+  /* If -w is specified, prepend beginning-of-word and end-of-word
+     assertions to the regexp before compiling. */
+  if (word_regexp)
+    {
+      char *tmp = regexp;
+      int len = strlen(tmp);
+      regexp = malloc(len + 7);
+      if (regexp == NULL)
+	{
+	  fprintf(stderr, "%s: %s\n", program_name, _("Out of memory"));
+	  return 2;
+	}
+      strcpy(regexp, "\\<(");
+      strcpy(regexp + 3, tmp);
+      strcpy(regexp + len + 3, ")\\>");
+    }
+
+  /* Compile the pattern. */
+  errcode = tre_regcomp(&preg, regexp, comp_flags);
+  if (errcode)
+    {
+      char errbuf[256];
+      tre_regerror(errcode, &preg, errbuf, sizeof(errbuf));
+      fprintf(stderr, "%s: %s: %s\n",
+	      program_name, _("Error in search pattern"), errbuf);
+      return 2;
+    }
+
+  /* Compile the record delimiter pattern. */
+  errcode = tre_regcomp(&delim, delim_regexp, REG_EXTENDED | REG_NEWLINE);
+  if (errcode)
+    {
+      char errbuf[256];
+      tre_regerror(errcode, &preg, errbuf, sizeof(errbuf));
+      fprintf(stderr, "%s: %s: %s\n",
+	      program_name, _("Error in record delimiter pattern"), errbuf);
+      return 2;
+    }
+
+  if (tre_regexec(&delim, "", 0, NULL, 0) == REG_OK)
+    {
+      fprintf(stderr, "%s: %s\n", program_name,
+	      _("Record delimiter pattern must not match an empty string"));
+      return 2;
+    }
+
+  /* The rest of the arguments are file(s) to match. */
+
+  /* If -h or -H were not specified, print filenames if there are more
+     than one files specified. */
+  if (print_filename == -1)
+    {
+      if (argc - optind <= 1)
+	print_filename = 0;
+      else
+	print_filename = 1;
+    }
+
+  if (optind >= argc)
+    {
+      /* There are no files specified, read from stdin. */
+      tre_agrep_handle_file(NULL);
+    }
+  else if (best_match)
+    {
+      int first_ind = optind;
+
+      /* Best match mode.  Set up the limits first. */
+      if (!max_cost_set)
+	match_params.max_cost = INT_MAX;
+      best_cost = INT_MAX;
+
+      /* Scan all files once without outputting anything, searching
+	 for the best matches. */
+      while (optind < argc)
+	tre_agrep_handle_file(argv[optind++]);
+
+      /* If there were no matches, bail out now. */
+      if (best_cost == INT_MAX)
+	return 1;
+
+      /* Otherwise, rescan the files with max_cost set to the cost
+	 of the best match found previously, this time outputting
+	 the matches. */
+      match_params.max_cost = best_cost;
+      best_match = 2;
+      optind = first_ind;
+      while (optind < argc)
+	tre_agrep_handle_file(argv[optind++]);
+    }
+  else
+    {
+      /* Normal mode. */
+      while (optind < argc)
+	tre_agrep_handle_file(argv[optind++]);
+    }
+
+  return have_matches == 0;
+}