1606 lines
38 KiB
C
1606 lines
38 KiB
C
/* Prepare Tex index dribble output into an actual index.
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Copyright (C) 1987 Free Software Foundation, Inc.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 1, or (at your option)
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any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
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#include <stdio.h>
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#include <ctype.h>
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#include <errno.h>
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extern int errno;
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#ifdef VMS
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#ifndef VAX11C
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#define noshare
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#endif
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#include <perror.h>
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#include <file.h>
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#define EXIT_SUCCESS ((1 << 28) | 1)
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#define EXIT_FATAL ((1 << 28) | 4)
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#define unlink delete
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#define tell(fd) lseek(fd, 0L, 1)
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#else /* Not VMS */
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#ifdef USG
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#include <sys/types.h>
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#include <sys/fcntl.h>
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#endif
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#include <sys/file.h>
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#define EXIT_SUCCESS 0
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#define EXIT_FATAL 1
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#endif /* Not VMS */
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#ifndef L_XTND
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#define L_XTND 2
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#endif
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#ifdef VMS
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extern noshare int sys_nerr;
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extern noshare char *sys_errlist[];
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#else
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extern int sys_nerr;
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extern char *sys_errlist[];
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#endif
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/* When sorting in core, this structure describes one line
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and the position and length of its first keyfield. */
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struct lineinfo
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{
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char *text; /* The actual text of the line */
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union
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{ /* The start of the key (for textual comparison) */
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char *text;
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long number; /* or the numeric value (for numeric comparison) */
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} key;
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long keylen; /* Length of key field */
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};
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/* This structure describes a field to use as a sort key */
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struct keyfield
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{
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int startwords; /* # words to skip */
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int startchars; /* and # additional chars to skip, to start of field */
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int endwords; /* similar, from beg (or end) of line, to find end of field */
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int endchars;
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char ignore_blanks; /* Ignore spaces and tabs within the field */
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char fold_case; /* Convert upper case to lower before comparing */
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char reverse; /* Compare in reverse order */
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char numeric; /* Parse text as an integer and compare the integers */
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char positional; /* Sort according to position within the file */
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char braced; /* Count balanced-braced groupings as fields */
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};
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/* Vector of keyfields to use */
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struct keyfield keyfields[3];
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/* Number of keyfields stored in that vector. */
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int num_keyfields = 3;
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/* Vector of input file names, terminated with a zero (null pointer) */
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char **infiles;
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/* Vector of corresponding output file names, or zero meaning default it */
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char **outfiles;
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/* Length of `infiles' */
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int num_infiles;
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/* Pointer to the array of pointers to lines being sorted */
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char **linearray;
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/* The allocated length of `linearray'. */
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long nlines;
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/* Directory to use for temporary files. On Unix, it ends with a slash. */
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char *tempdir;
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/* Start of filename to use for temporary files. */
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char *tempbase;
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/* Number of last temporary file. */
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int tempcount;
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/* Number of last temporary file already deleted.
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Temporary files are deleted by `flush_tempfiles' in order of creation. */
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int last_deleted_tempcount;
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/* During in-core sort, this points to the base of the data block
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which contains all the lines of data. */
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char *text_base;
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/* Additional command switches */
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int keep_tempfiles; /* Nonzero means do not delete tempfiles -- for debugging */
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/* Forward declarations of functions in this file */
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void decode_command ();
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void sort_in_core ();
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void sort_offline ();
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char **parsefile ();
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char *find_field ();
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char *find_pos ();
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long find_value ();
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char *find_braced_pos ();
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char *find_braced_end ();
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void writelines ();
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int compare_full ();
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long readline ();
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int merge_files ();
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int merge_direct ();
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char *concat ();
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char *maketempname ();
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void flush_tempfiles ();
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char *tempcopy ();
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extern char *mktemp ();
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#define MAX_IN_CORE_SORT 500000
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int
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main (argc, argv)
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int argc;
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char **argv;
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{
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int i;
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tempcount = 0;
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last_deleted_tempcount = 0;
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/* Describe the kind of sorting to do. */
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/* The first keyfield uses the first braced field and folds case */
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keyfields[0].braced = 1;
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keyfields[0].fold_case = 1;
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keyfields[0].endwords = -1;
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keyfields[0].endchars = -1;
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/* The second keyfield uses the second braced field, numerically */
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keyfields[1].braced = 1;
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keyfields[1].numeric = 1;
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keyfields[1].startwords = 1;
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keyfields[1].endwords = -1;
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keyfields[1].endchars = -1;
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/* The third keyfield (which is ignored while discarding duplicates)
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compares the whole line */
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keyfields[2].endwords = -1;
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keyfields[2].endchars = -1;
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decode_command (argc, argv);
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tempbase = mktemp (concat ("txiXXXXXX", "", ""));
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/* Process input files completely, one by one. */
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for (i = 0; i < num_infiles; i++)
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{
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int desc;
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long ptr;
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char *outfile;
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char *p;
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desc = open (infiles[i], 0, 0);
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if (desc < 0) pfatal_with_name (infiles[i]);
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lseek (desc, 0, L_XTND);
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ptr = tell (desc);
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close (desc);
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outfile = outfiles[i];
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if (!outfile)
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{
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outfile = concat (infiles[i], "s", "");
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}
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if (ptr < MAX_IN_CORE_SORT)
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/* Sort a small amount of data */
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sort_in_core (infiles[i], ptr, outfile);
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else
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sort_offline (infiles[i], ptr, outfile);
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}
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flush_tempfiles (tempcount);
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exit (EXIT_SUCCESS);
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}
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/* This page decodes the command line arguments to set the parameter variables
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and set up the vector of keyfields and the vector of input files */
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void
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decode_command (argc, argv)
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int argc;
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char **argv;
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{
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int i;
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char **ip;
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char **op;
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/* Store default values into parameter variables */
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#ifdef VMS
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tempdir = "sys$scratch:";
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#else
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tempdir = "/tmp/";
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#endif
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keep_tempfiles = 0;
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/* Allocate argc input files, which must be enough. */
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infiles = (char **) xmalloc (argc * sizeof (char *));
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outfiles = (char **) xmalloc (argc * sizeof (char *));
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ip = infiles;
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op = outfiles;
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/* First find all switches that control the default kind-of-sort */
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for (i = 1; i < argc; i++)
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{
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int tem = classify_arg (argv[i]);
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char c;
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char *p;
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if (tem <= 0)
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{
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*ip++ = argv[i];
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*op++ = 0;
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continue;
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}
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if (tem > 1)
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{
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if (i + 1 == argc)
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fatal ("switch %s given with no argument following it", argv[i]);
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else if (!strcmp (argv[i], "-T"))
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tempdir = argv[i + 1];
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else if (!strcmp (argv[i], "-o"))
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*(op - 1) = argv[i + 1];
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i += tem - 1;
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continue;
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}
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p = &argv[i][1];
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while (c = *p++)
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switch (c)
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{
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case 'k':
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keep_tempfiles = 1;
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break;
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default:
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fatal ("invalid command switch %c", c);
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}
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switchdone: ;
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}
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/* Record number of keyfields, terminate list of filenames */
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num_infiles = ip - infiles;
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*ip = 0;
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}
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/* Return 0 for an argument that is not a switch;
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for a switch, return 1 plus the number of following arguments that the switch swallows.
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*/
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int
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classify_arg (arg)
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char *arg;
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{
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if (!strcmp (arg, "-T") || !strcmp (arg, "-o"))
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return 2;
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if (arg[0] == '-')
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return 1;
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return 0;
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}
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/* Create a name for a temporary file */
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char *
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maketempname (count)
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int count;
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{
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char tempsuffix[10];
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sprintf (tempsuffix, "%d", count);
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return concat (tempdir, tempbase, tempsuffix);
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}
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/* Delete all temporary files up to the specified count */
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void
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flush_tempfiles (to_count)
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int to_count;
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{
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if (keep_tempfiles) return;
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while (last_deleted_tempcount < to_count)
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unlink (maketempname (++last_deleted_tempcount));
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}
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/* Copy an input file into a temporary file, and return the temporary file name */
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#define BUFSIZE 1024
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char *
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tempcopy (idesc)
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int idesc;
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{
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char *outfile = maketempname (++tempcount);
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int odesc;
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char buffer[BUFSIZE];
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odesc = open (outfile, O_WRONLY | O_CREAT, 0666);
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if (odesc < 0) pfatal_with_name (outfile);
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while (1)
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{
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int nread = read (idesc, buffer, BUFSIZE);
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write (odesc, buffer, nread);
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if (!nread) break;
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}
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close (odesc);
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return outfile;
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}
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/* Compare two lines, provided as pointers to pointers to text,
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according to the specified set of keyfields */
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int
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compare_full (line1, line2)
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char **line1, **line2;
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{
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int i;
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/* Compare using the first keyfield;
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if that does not distinguish the lines, try the second keyfield; and so on. */
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for (i = 0; i < num_keyfields; i++)
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{
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long length1, length2;
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char *start1 = find_field (&keyfields[i], *line1, &length1);
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char *start2 = find_field (&keyfields[i], *line2, &length2);
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int tem = compare_field (&keyfields[i], start1, length1, *line1 - text_base,
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start2, length2, *line2 - text_base);
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if (tem)
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{
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if (keyfields[i].reverse)
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return - tem;
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return tem;
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}
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}
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return 0; /* Lines match exactly */
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}
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/* Compare two lines described by structures
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in which the first keyfield is identified in advance.
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For positional sorting, assumes that the order of the lines in core
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reflects their nominal order. */
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int
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compare_prepared (line1, line2)
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struct lineinfo *line1, *line2;
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{
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int i;
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int tem;
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char *text1, *text2;
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/* Compare using the first keyfield, which has been found for us already */
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if (keyfields->positional)
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{
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if (line1->text - text_base > line2->text - text_base)
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tem = 1;
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else
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tem = -1;
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}
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else if (keyfields->numeric)
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tem = line1->key.number - line2->key.number;
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else
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tem = compare_field (keyfields, line1->key.text, line1->keylen, 0, line2->key.text, line2->keylen, 0);
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if (tem)
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{
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if (keyfields->reverse)
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return - tem;
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return tem;
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}
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text1 = line1->text;
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text2 = line2->text;
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/* Compare using the second keyfield;
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if that does not distinguish the lines, try the third keyfield; and so on. */
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for (i = 1; i < num_keyfields; i++)
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{
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long length1, length2;
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char *start1 = find_field (&keyfields[i], text1, &length1);
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char *start2 = find_field (&keyfields[i], text2, &length2);
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int tem = compare_field (&keyfields[i], start1, length1, text1 - text_base,
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start2, length2, text2 - text_base);
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if (tem)
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{
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if (keyfields[i].reverse)
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return - tem;
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return tem;
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}
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}
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return 0; /* Lines match exactly */
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}
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/* Like compare_full but more general.
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You can pass any strings, and you can say how many keyfields to use.
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`pos1' and `pos2' should indicate the nominal positional ordering of
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the two lines in the input. */
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int
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compare_general (str1, str2, pos1, pos2, use_keyfields)
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char *str1, *str2;
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long pos1, pos2;
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int use_keyfields;
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{
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||
int i;
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||
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/* Compare using the first keyfield;
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if that does not distinguish the lines, try the second keyfield; and so on. */
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for (i = 0; i < use_keyfields; i++)
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{
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long length1, length2;
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char *start1 = find_field (&keyfields[i], str1, &length1);
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||
char *start2 = find_field (&keyfields[i], str2, &length2);
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||
int tem = compare_field (&keyfields[i], start1, length1, pos1, start2, length2, pos2);
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||
if (tem)
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||
{
|
||
if (keyfields[i].reverse)
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||
return - tem;
|
||
return tem;
|
||
}
|
||
}
|
||
|
||
return 0; /* Lines match exactly */
|
||
}
|
||
|
||
/* Find the start and length of a field in `str' according to `keyfield'.
|
||
A pointer to the starting character is returned, and the length
|
||
is stored into the int that `lengthptr' points to. */
|
||
|
||
char *
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||
find_field (keyfield, str, lengthptr)
|
||
struct keyfield *keyfield;
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||
char *str;
|
||
long *lengthptr;
|
||
{
|
||
char *start;
|
||
char *end;
|
||
char *(*fun) ();
|
||
|
||
if (keyfield->braced) fun = find_braced_pos;
|
||
else fun = find_pos;
|
||
|
||
start = ( *fun )(str, keyfield->startwords, keyfield->startchars,
|
||
keyfield->ignore_blanks);
|
||
if (keyfield->endwords < 0)
|
||
{
|
||
if (keyfield->braced)
|
||
end = find_braced_end (start);
|
||
else
|
||
{
|
||
end = start;
|
||
while (*end && *end != '\n') end++;
|
||
}
|
||
}
|
||
else
|
||
{
|
||
end = ( *fun )(str, keyfield->endwords, keyfield->endchars, 0);
|
||
if (end - str < start - str) end = start;
|
||
}
|
||
*lengthptr = end - start;
|
||
return start;
|
||
}
|
||
|
||
/* Find a pointer to a specified place within `str',
|
||
skipping (from the beginning) `words' words and then `chars' chars.
|
||
If `ignore_blanks' is nonzero, we skip all blanks
|
||
after finding the specified word. */
|
||
|
||
char *
|
||
find_pos (str, words, chars, ignore_blanks)
|
||
char *str;
|
||
int words, chars;
|
||
int ignore_blanks;
|
||
{
|
||
int i;
|
||
char *p = str;
|
||
|
||
for (i = 0; i < words; i++)
|
||
{
|
||
char c;
|
||
/* Find next bunch of nonblanks and skip them. */
|
||
while ((c = *p) == ' ' || c == '\t') p++;
|
||
while ((c = *p) && c != '\n' && !(c == ' ' || c == '\t')) p++;
|
||
if (!*p || *p == '\n') return p;
|
||
}
|
||
|
||
while (*p == ' ' || *p == '\t') p++;
|
||
|
||
for (i = 0; i < chars; i++)
|
||
{
|
||
if (!*p || *p == '\n') break;
|
||
p++;
|
||
}
|
||
return p;
|
||
}
|
||
|
||
/* Like find_pos but assumes that each field is surrounded by braces
|
||
and that braces within fields are balanced. */
|
||
|
||
char *
|
||
find_braced_pos (str, words, chars, ignore_blanks)
|
||
char *str;
|
||
int words, chars;
|
||
int ignore_blanks;
|
||
{
|
||
int i;
|
||
int bracelevel;
|
||
char *p = str;
|
||
char c;
|
||
|
||
for (i = 0; i < words; i++)
|
||
{
|
||
bracelevel = 1;
|
||
while ((c = *p++) != '{' && c != '\n' && c);
|
||
if (c != '{')
|
||
return p - 1;
|
||
while (bracelevel)
|
||
{
|
||
c = *p++;
|
||
if (c == '{') bracelevel++;
|
||
if (c == '}') bracelevel--;
|
||
#if 0
|
||
if (c == '\\' || c == '@') c = *p++; /* \ quotes braces and \ */
|
||
#endif
|
||
if (c == 0 || c == '\n') return p-1;
|
||
}
|
||
}
|
||
|
||
while ((c = *p++) != '{' && c != '\n' && c);
|
||
|
||
if (c != '{')
|
||
return p-1;
|
||
|
||
if (ignore_blanks)
|
||
while ((c = *p) == ' ' || c == '\t') p++;
|
||
|
||
for (i = 0; i < chars; i++)
|
||
{
|
||
if (!*p || *p == '\n') break;
|
||
p++;
|
||
}
|
||
return p;
|
||
}
|
||
|
||
/* Find the end of the balanced-brace field which starts at `str'.
|
||
The position returned is just before the closing brace. */
|
||
|
||
char *
|
||
find_braced_end (str)
|
||
char *str;
|
||
{
|
||
int bracelevel;
|
||
char *p = str;
|
||
char c;
|
||
|
||
bracelevel = 1;
|
||
while (bracelevel)
|
||
{
|
||
c = *p++;
|
||
if (c == '{') bracelevel++;
|
||
if (c == '}') bracelevel--;
|
||
#if 0
|
||
if (c == '\\' || c == '@') c = *p++;
|
||
#endif
|
||
if (c == 0 || c == '\n') return p-1;
|
||
}
|
||
return p - 1;
|
||
}
|
||
|
||
long
|
||
find_value (start, length)
|
||
char *start;
|
||
long length;
|
||
{
|
||
while (length != 0L) {
|
||
if (isdigit(*start))
|
||
return atol(start);
|
||
length--;
|
||
start++;
|
||
}
|
||
return 0l;
|
||
}
|
||
|
||
/* Vector used to translate characters for comparison.
|
||
This is how we make all alphanumerics follow all else,
|
||
and ignore case in the first sorting. */
|
||
int char_order[256];
|
||
|
||
init_char_order ()
|
||
{
|
||
int i;
|
||
for (i = 1; i < 256; i++)
|
||
char_order[i] = i;
|
||
|
||
for (i = '0'; i <= '9'; i++)
|
||
char_order[i] += 512;
|
||
|
||
for (i = 'a'; i <= 'z'; i++) {
|
||
char_order[i] = 512 + i;
|
||
char_order[i + 'A' - 'a'] = 512 + i;
|
||
}
|
||
}
|
||
|
||
/* Compare two fields (each specified as a start pointer and a character count)
|
||
according to `keyfield'. The sign of the value reports the relation between the fields */
|
||
|
||
int
|
||
compare_field (keyfield, start1, length1, pos1, start2, length2, pos2)
|
||
struct keyfield *keyfield;
|
||
char *start1;
|
||
long length1;
|
||
long pos1;
|
||
char *start2;
|
||
long length2;
|
||
long pos2;
|
||
{
|
||
if (keyfields->positional)
|
||
{
|
||
if (pos1 > pos2)
|
||
return 1;
|
||
else
|
||
return -1;
|
||
}
|
||
if (keyfield->numeric)
|
||
{
|
||
long value = find_value (start1, length1) - find_value (start2, length2);
|
||
if (value > 0) return 1;
|
||
if (value < 0) return -1;
|
||
return 0;
|
||
}
|
||
else
|
||
{
|
||
char *p1 = start1;
|
||
char *p2 = start2;
|
||
char *e1 = start1 + length1;
|
||
char *e2 = start2 + length2;
|
||
|
||
int fold_case = keyfield->fold_case;
|
||
|
||
while (1)
|
||
{
|
||
int c1, c2;
|
||
|
||
if (p1 == e1) c1 = 0;
|
||
else c1 = *p1++;
|
||
if (p2 == e2) c2 = 0;
|
||
else c2 = *p2++;
|
||
|
||
if (char_order[c1] != char_order[c2])
|
||
return char_order[c1] - char_order[c2];
|
||
if (!c1) break;
|
||
}
|
||
|
||
/* Strings are equal except possibly for case. */
|
||
p1 = start1;
|
||
p2 = start2;
|
||
while (1)
|
||
{
|
||
int c1, c2;
|
||
|
||
if (p1 == e1) c1 = 0;
|
||
else c1 = *p1++;
|
||
if (p2 == e2) c2 = 0;
|
||
else c2 = *p2++;
|
||
|
||
if (c1 != c2)
|
||
/* Reverse sign here so upper case comes out last. */
|
||
return c2 - c1;
|
||
if (!c1) break;
|
||
}
|
||
|
||
return 0;
|
||
}
|
||
}
|
||
|
||
/* A `struct linebuffer' is a structure which holds a line of text.
|
||
`readline' reads a line from a stream into a linebuffer
|
||
and works regardless of the length of the line. */
|
||
|
||
struct linebuffer
|
||
{
|
||
long size;
|
||
char *buffer;
|
||
};
|
||
|
||
/* Initialize a linebuffer for use */
|
||
|
||
void
|
||
initbuffer (linebuffer)
|
||
struct linebuffer *linebuffer;
|
||
{
|
||
linebuffer->size = 200;
|
||
linebuffer->buffer = (char *) xmalloc (200);
|
||
}
|
||
|
||
/* Read a line of text from `stream' into `linebuffer'.
|
||
Return the length of the line. */
|
||
|
||
long
|
||
readline (linebuffer, stream)
|
||
struct linebuffer *linebuffer;
|
||
FILE *stream;
|
||
{
|
||
char *buffer = linebuffer->buffer;
|
||
char *p = linebuffer->buffer;
|
||
char *end = p + linebuffer->size;
|
||
|
||
while (1)
|
||
{
|
||
int c = getc (stream);
|
||
if (p == end)
|
||
{
|
||
buffer = (char *) xrealloc (buffer, linebuffer->size *= 2);
|
||
p += buffer - linebuffer->buffer;
|
||
end += buffer - linebuffer->buffer;
|
||
linebuffer->buffer = buffer;
|
||
}
|
||
if (c < 0 || c == '\n')
|
||
{
|
||
*p = 0;
|
||
break;
|
||
}
|
||
*p++ = c;
|
||
}
|
||
|
||
return p - buffer;
|
||
}
|
||
|
||
/* Sort an input file too big to sort in core. */
|
||
|
||
void
|
||
sort_offline (infile, nfiles, total, outfile)
|
||
char *infile;
|
||
long total;
|
||
char *outfile;
|
||
{
|
||
int ntemps = 2 * (total + MAX_IN_CORE_SORT - 1) / MAX_IN_CORE_SORT; /* More than enough */
|
||
char **tempfiles = (char **) xmalloc (ntemps * sizeof (char *));
|
||
FILE *istream = fopen (infile, "r");
|
||
int i;
|
||
struct linebuffer lb;
|
||
long linelength;
|
||
int failure = 0;
|
||
|
||
initbuffer (&lb);
|
||
|
||
/* Read in one line of input data. */
|
||
|
||
linelength = readline (&lb, istream);
|
||
|
||
if (lb.buffer[0] != '\\' && lb.buffer[0] != '@')
|
||
{
|
||
error ("%s: not a texinfo index file", infile);
|
||
return;
|
||
}
|
||
|
||
/* Split up the input into `ntemps' temporary files, or maybe fewer,
|
||
and put the new files' names into `tempfiles' */
|
||
|
||
for (i = 0; i < ntemps; i++)
|
||
{
|
||
char *outname = maketempname (++tempcount);
|
||
FILE *ostream = fopen (outname, "w");
|
||
long tempsize = 0;
|
||
|
||
if (!ostream) pfatal_with_name (outname);
|
||
tempfiles[i] = outname;
|
||
|
||
/* Copy lines into this temp file as long as it does not make file "too big"
|
||
or until there are no more lines. */
|
||
|
||
while (tempsize + linelength + 1 <= MAX_IN_CORE_SORT)
|
||
{
|
||
tempsize += linelength + 1;
|
||
fputs (lb.buffer, ostream);
|
||
putc ('\n', ostream);
|
||
|
||
/* Read another line of input data. */
|
||
|
||
linelength = readline (&lb, istream);
|
||
if (!linelength && feof (istream)) break;
|
||
|
||
if (lb.buffer[0] != '\\' && lb.buffer[0] != '@')
|
||
{
|
||
error ("%s: not a texinfo index file", infile);
|
||
failure = 1;
|
||
goto fail;
|
||
}
|
||
}
|
||
fclose (ostream);
|
||
if (feof (istream)) break;
|
||
}
|
||
|
||
free (lb.buffer);
|
||
|
||
fail:
|
||
/* Record number of temp files we actually needed. */
|
||
|
||
ntemps = i;
|
||
|
||
/* Sort each tempfile into another tempfile.
|
||
Delete the first set of tempfiles and put the names of the second into `tempfiles' */
|
||
|
||
for (i = 0; i < ntemps; i++)
|
||
{
|
||
char *newtemp = maketempname (++tempcount);
|
||
sort_in_core (&tempfiles[i], MAX_IN_CORE_SORT, newtemp);
|
||
if (!keep_tempfiles)
|
||
unlink (tempfiles[i]);
|
||
tempfiles[i] = newtemp;
|
||
}
|
||
|
||
if (failure)
|
||
return;
|
||
|
||
/* Merge the tempfiles together and indexify */
|
||
|
||
merge_files (tempfiles, ntemps, outfile);
|
||
}
|
||
|
||
/* Sort `infile', whose size is `total',
|
||
assuming that is small enough to be done in-core,
|
||
then indexify it and send the output to `outfile' (or to stdout). */
|
||
|
||
void
|
||
sort_in_core (infile, total, outfile)
|
||
char *infile;
|
||
long total;
|
||
char *outfile;
|
||
{
|
||
char **nextline;
|
||
char *data = (char *) xmalloc (total + 1);
|
||
char *file_data;
|
||
long file_size;
|
||
int i;
|
||
FILE *ostream = stdout;
|
||
struct lineinfo *lineinfo;
|
||
|
||
/* Read the contents of the file into the moby array `data' */
|
||
|
||
int desc = open (infile, 0, 0);
|
||
|
||
if (desc < 0)
|
||
fatal ("failure reopening %s", infile);
|
||
for (file_size = 0; ; )
|
||
{
|
||
if ((i = read (desc, data + file_size, total - file_size)) <= 0)
|
||
break;
|
||
file_size += i;
|
||
}
|
||
file_data = data;
|
||
data[file_size] = 0;
|
||
|
||
close (desc);
|
||
|
||
if (file_size > 0 && data[0] != '\\' && data[0] != '@')
|
||
{
|
||
error ("%s: not a texinfo index file", infile);
|
||
return;
|
||
}
|
||
|
||
init_char_order ();
|
||
|
||
/* Sort routines want to know this address */
|
||
|
||
text_base = data;
|
||
|
||
/* Create the array of pointers to lines, with a default size frequently enough. */
|
||
|
||
nlines = total / 50;
|
||
if (!nlines) nlines = 2;
|
||
linearray = (char **) xmalloc (nlines * sizeof (char *));
|
||
|
||
/* `nextline' points to the next free slot in this array.
|
||
`nlines' is the allocated size. */
|
||
|
||
nextline = linearray;
|
||
|
||
/* Parse the input file's data, and make entries for the lines. */
|
||
|
||
nextline = parsefile (infile, nextline, file_data, file_size);
|
||
if (nextline == 0)
|
||
{
|
||
error ("%s: not a texinfo index file", infile);
|
||
return;
|
||
}
|
||
|
||
/* Sort the lines */
|
||
|
||
/* If we have enough space, find the first keyfield of each line in advance.
|
||
Make a `struct lineinfo' for each line, which records the keyfield
|
||
as well as the line, and sort them. */
|
||
|
||
lineinfo = (struct lineinfo *) malloc ((nextline - linearray) * sizeof (struct lineinfo));
|
||
|
||
if (lineinfo)
|
||
{
|
||
struct lineinfo *lp;
|
||
char **p;
|
||
|
||
for (lp = lineinfo, p = linearray; p != nextline; lp++, p++)
|
||
{
|
||
lp->text = *p;
|
||
lp->key.text = find_field (keyfields, *p, &lp->keylen);
|
||
if (keyfields->numeric)
|
||
lp->key.number = find_value (lp->key.text, lp->keylen);
|
||
}
|
||
|
||
qsort (lineinfo, nextline - linearray, sizeof (struct lineinfo), compare_prepared);
|
||
|
||
for (lp = lineinfo, p = linearray; p != nextline; lp++, p++)
|
||
*p = lp->text;
|
||
|
||
free (lineinfo);
|
||
}
|
||
else
|
||
qsort (linearray, nextline - linearray, sizeof (char *), compare_full);
|
||
|
||
/* Open the output file */
|
||
|
||
if (outfile)
|
||
{
|
||
ostream = fopen (outfile, "w");
|
||
if (!ostream)
|
||
pfatal_with_name (outfile);
|
||
}
|
||
|
||
writelines (linearray, nextline - linearray, ostream);
|
||
if (outfile) fclose (ostream);
|
||
|
||
free (linearray);
|
||
free (data);
|
||
}
|
||
|
||
/* Parse an input string in core into lines.
|
||
DATA is the input string, and SIZE is its length.
|
||
Data goes in LINEARRAY starting at NEXTLINE.
|
||
The value returned is the first entry in LINEARRAY still unused.
|
||
Value 0 means input file contents are invalid. */
|
||
|
||
char **
|
||
parsefile (filename, nextline, data, size)
|
||
char *filename;
|
||
char **nextline;
|
||
char *data;
|
||
long size;
|
||
{
|
||
char *p, *end;
|
||
char **line = nextline;
|
||
|
||
p = data;
|
||
end = p + size;
|
||
*end = 0;
|
||
|
||
while (p != end)
|
||
{
|
||
if (p[0] != '\\' && p[0] != '@')
|
||
return 0;
|
||
|
||
*line = p;
|
||
while (*p && *p != '\n') p++;
|
||
if (p != end) p++;
|
||
|
||
line++;
|
||
if (line == linearray + nlines)
|
||
{
|
||
char **old = linearray;
|
||
linearray = (char **) xrealloc (linearray, sizeof (char *) * (nlines *= 4));
|
||
line += linearray - old;
|
||
}
|
||
}
|
||
|
||
return line;
|
||
}
|
||
|
||
/* Indexification is a filter applied to the sorted lines
|
||
as they are being written to the output file.
|
||
Multiple entries for the same name, with different page numbers,
|
||
get combined into a single entry with multiple page numbers.
|
||
The first braced field, which is used for sorting, is discarded.
|
||
However, its first character is examined, folded to lower case,
|
||
and if it is different from that in the previous line fed to us
|
||
a \initial line is written with one argument, the new initial.
|
||
|
||
If an entry has four braced fields, then the second and third
|
||
constitute primary and secondary names.
|
||
In this case, each change of primary name
|
||
generates a \primary line which contains only the primary name,
|
||
and in between these are \secondary lines which contain
|
||
just a secondary name and page numbers.
|
||
*/
|
||
|
||
/* The last primary name we wrote a \primary entry for.
|
||
If only one level of indexing is being done, this is the last name seen */
|
||
char *lastprimary;
|
||
int lastprimarylength; /* Length of storage allocated for lastprimary */
|
||
|
||
/* Similar, for the secondary name. */
|
||
char *lastsecondary;
|
||
int lastsecondarylength;
|
||
|
||
/* Zero if we are not in the middle of writing an entry.
|
||
One if we have written the beginning of an entry but have not
|
||
yet written any page numbers into it.
|
||
Greater than one if we have written the beginning of an entry
|
||
plus at least one page number. */
|
||
int pending;
|
||
|
||
/* The initial (for sorting purposes) of the last primary entry written.
|
||
When this changes, a \initial {c} line is written */
|
||
|
||
char * lastinitial;
|
||
|
||
int lastinitiallength;
|
||
|
||
/* When we need a string of length 1 for the value of lastinitial,
|
||
store it here. */
|
||
|
||
char lastinitial1[2];
|
||
|
||
/* Initialize static storage for writing an index */
|
||
|
||
void
|
||
init_index ()
|
||
{
|
||
pending = 0;
|
||
lastinitial = lastinitial1;
|
||
lastinitial1[0] = 0;
|
||
lastinitial1[1] = 0;
|
||
lastinitiallength = 0;
|
||
lastprimarylength = 100;
|
||
lastprimary = (char *) xmalloc (lastprimarylength + 1);
|
||
bzero (lastprimary, lastprimarylength + 1);
|
||
lastsecondarylength = 100;
|
||
lastsecondary = (char *) xmalloc (lastsecondarylength + 1);
|
||
bzero (lastsecondary, lastsecondarylength + 1);
|
||
}
|
||
|
||
/* Indexify. Merge entries for the same name,
|
||
insert headers for each initial character, etc. */
|
||
|
||
indexify (line, ostream)
|
||
char *line;
|
||
FILE *ostream;
|
||
{
|
||
char *primary, *secondary, *pagenumber;
|
||
int primarylength, secondarylength, pagelength;
|
||
int len = strlen (line);
|
||
int nosecondary;
|
||
int initiallength;
|
||
char *initial;
|
||
char initial1[2];
|
||
register char *p;
|
||
|
||
/* First, analyze the parts of the entry fed to us this time */
|
||
|
||
p = find_braced_pos (line, 0, 0, 0);
|
||
if (*p == '{')
|
||
{
|
||
initial = p;
|
||
/* Get length of inner pair of braces starting at p,
|
||
including that inner pair of braces. */
|
||
initiallength = find_braced_end (p + 1) + 1 - p;
|
||
}
|
||
else
|
||
{
|
||
initial = initial1;
|
||
initial1[0] = *p;
|
||
initial1[1] = 0;
|
||
initiallength = 1;
|
||
|
||
if (initial1[0] >= 'a' && initial1[0] <= 'z')
|
||
initial1[0] -= 040;
|
||
}
|
||
|
||
pagenumber = find_braced_pos (line, 1, 0, 0);
|
||
pagelength = find_braced_end (pagenumber) - pagenumber;
|
||
if (pagelength == 0)
|
||
abort ();
|
||
|
||
primary = find_braced_pos (line, 2, 0, 0);
|
||
primarylength = find_braced_end (primary) - primary;
|
||
|
||
secondary = find_braced_pos (line, 3, 0, 0);
|
||
nosecondary = !*secondary;
|
||
if (!nosecondary)
|
||
secondarylength = find_braced_end (secondary) - secondary;
|
||
|
||
/* If the primary is different from before, make a new primary entry */
|
||
if (strncmp (primary, lastprimary, primarylength))
|
||
{
|
||
/* Close off current secondary entry first, if one is open */
|
||
if (pending)
|
||
{
|
||
fputs ("}\n", ostream);
|
||
pending = 0;
|
||
}
|
||
|
||
/* If this primary has a different initial, include an entry for the initial */
|
||
if (initiallength != lastinitiallength ||
|
||
strncmp (initial, lastinitial, initiallength))
|
||
{
|
||
fprintf (ostream, "\\initial {");
|
||
fwrite (initial, 1, initiallength, ostream);
|
||
fprintf (ostream, "}\n", initial);
|
||
if (initial == initial1)
|
||
{
|
||
lastinitial = lastinitial1;
|
||
*lastinitial1 = *initial1;
|
||
}
|
||
else
|
||
{
|
||
lastinitial = initial;
|
||
}
|
||
lastinitiallength = initiallength;
|
||
}
|
||
|
||
/* Make the entry for the primary. */
|
||
if (nosecondary)
|
||
fputs ("\\entry {", ostream);
|
||
else
|
||
fputs ("\\primary {", ostream);
|
||
fwrite (primary, primarylength, 1, ostream);
|
||
if (nosecondary)
|
||
{
|
||
fputs ("}{", ostream);
|
||
pending = 1;
|
||
}
|
||
else
|
||
fputs ("}\n", ostream);
|
||
|
||
/* Record name of most recent primary */
|
||
if (lastprimarylength < primarylength)
|
||
{
|
||
lastprimarylength = primarylength + 100;
|
||
lastprimary = (char *) xrealloc (lastprimary,
|
||
1 + lastprimarylength);
|
||
}
|
||
strncpy (lastprimary, primary, primarylength);
|
||
lastprimary[primarylength] = 0;
|
||
|
||
/* There is no current secondary within this primary, now */
|
||
lastsecondary[0] = 0;
|
||
}
|
||
|
||
/* Should not have an entry with no subtopic following one with a subtopic */
|
||
|
||
if (nosecondary && *lastsecondary)
|
||
error ("entry %s follows an entry with a secondary name", line);
|
||
|
||
/* Start a new secondary entry if necessary */
|
||
if (!nosecondary && strncmp (secondary, lastsecondary, secondarylength))
|
||
{
|
||
if (pending)
|
||
{
|
||
fputs ("}\n", ostream);
|
||
pending = 0;
|
||
}
|
||
|
||
/* Write the entry for the secondary. */
|
||
fputs ("\\secondary {", ostream);
|
||
fwrite (secondary, secondarylength, 1, ostream);
|
||
fputs ("}{", ostream);
|
||
pending = 1;
|
||
|
||
/* Record name of most recent secondary */
|
||
if (lastsecondarylength < secondarylength)
|
||
{
|
||
lastsecondarylength = secondarylength + 100;
|
||
lastsecondary = (char *) xrealloc (lastsecondary,
|
||
1 + lastsecondarylength);
|
||
}
|
||
strncpy (lastsecondary, secondary, secondarylength);
|
||
lastsecondary[secondarylength] = 0;
|
||
}
|
||
|
||
/* Here to add one more page number to the current entry */
|
||
if (pending++ != 1)
|
||
fputs (", ", ostream); /* Punctuate first, if this is not the first */
|
||
fwrite (pagenumber, pagelength, 1, ostream);
|
||
}
|
||
|
||
/* Close out any unfinished output entry */
|
||
|
||
void
|
||
finish_index (ostream)
|
||
FILE *ostream;
|
||
{
|
||
if (pending)
|
||
fputs ("}\n", ostream);
|
||
free (lastprimary);
|
||
free (lastsecondary);
|
||
}
|
||
|
||
/* Copy the lines in the sorted order.
|
||
Each line is copied out of the input file it was found in. */
|
||
|
||
void
|
||
writelines (linearray, nlines, ostream)
|
||
char **linearray;
|
||
int nlines;
|
||
FILE *ostream;
|
||
{
|
||
char **stop_line = linearray + nlines;
|
||
char **next_line;
|
||
|
||
init_index ();
|
||
|
||
/* Output the text of the lines, and free the buffer space */
|
||
|
||
for (next_line = linearray; next_line != stop_line; next_line++)
|
||
{
|
||
/* If -u was specified, output the line only if distinct from previous one. */
|
||
if (next_line == linearray
|
||
/* Compare previous line with this one, using only the explicitly specd keyfields */
|
||
|| compare_general (*(next_line - 1), *next_line, 0L, 0L, num_keyfields - 1))
|
||
{
|
||
char *p = *next_line;
|
||
char c;
|
||
while ((c = *p++) && c != '\n');
|
||
*(p-1) = 0;
|
||
indexify (*next_line, ostream);
|
||
}
|
||
}
|
||
|
||
finish_index (ostream);
|
||
}
|
||
|
||
/* Assume (and optionally verify) that each input file is sorted;
|
||
merge them and output the result.
|
||
Returns nonzero if any input file fails to be sorted.
|
||
|
||
This is the high-level interface that can handle an unlimited number of files. */
|
||
|
||
#define MAX_DIRECT_MERGE 10
|
||
|
||
int
|
||
merge_files (infiles, nfiles, outfile)
|
||
char **infiles;
|
||
int nfiles;
|
||
char *outfile;
|
||
{
|
||
char **tempfiles;
|
||
int ntemps;
|
||
int i;
|
||
int value = 0;
|
||
int start_tempcount = tempcount;
|
||
|
||
if (nfiles <= MAX_DIRECT_MERGE)
|
||
return merge_direct (infiles, nfiles, outfile);
|
||
|
||
/* Merge groups of MAX_DIRECT_MERGE input files at a time,
|
||
making a temporary file to hold each group's result. */
|
||
|
||
ntemps = (nfiles + MAX_DIRECT_MERGE - 1) / MAX_DIRECT_MERGE;
|
||
tempfiles = (char **) xmalloc (ntemps * sizeof (char *));
|
||
for (i = 0; i < ntemps; i++)
|
||
{
|
||
int nf = MAX_DIRECT_MERGE;
|
||
if (i + 1 == ntemps)
|
||
nf = nfiles - i * MAX_DIRECT_MERGE;
|
||
tempfiles[i] = maketempname (++tempcount);
|
||
value |= merge_direct (&infiles[i * MAX_DIRECT_MERGE], nf, tempfiles[i]);
|
||
}
|
||
|
||
/* All temporary files that existed before are no longer needed
|
||
since their contents have been merged into our new tempfiles.
|
||
So delete them. */
|
||
flush_tempfiles (start_tempcount);
|
||
|
||
/* Now merge the temporary files we created. */
|
||
|
||
merge_files (tempfiles, ntemps, outfile);
|
||
|
||
free (tempfiles);
|
||
|
||
return value;
|
||
}
|
||
|
||
/* Assume (and optionally verify) that each input file is sorted;
|
||
merge them and output the result.
|
||
Returns nonzero if any input file fails to be sorted.
|
||
|
||
This version of merging will not work if the number of
|
||
input files gets too high. Higher level functions
|
||
use it only with a bounded number of input files. */
|
||
|
||
int
|
||
merge_direct (infiles, nfiles, outfile)
|
||
char **infiles;
|
||
int nfiles;
|
||
char *outfile;
|
||
{
|
||
char **ip = infiles;
|
||
struct linebuffer *lb1, *lb2;
|
||
struct linebuffer **thisline, **prevline;
|
||
FILE **streams;
|
||
int i;
|
||
int nleft;
|
||
int lossage = 0;
|
||
int *file_lossage;
|
||
struct linebuffer *prev_out = 0;
|
||
FILE *ostream = stdout;
|
||
|
||
if (outfile)
|
||
{
|
||
ostream = fopen (outfile, "w");
|
||
}
|
||
if (!ostream) pfatal_with_name (outfile);
|
||
|
||
init_index ();
|
||
|
||
if (nfiles == 0)
|
||
{
|
||
if (outfile)
|
||
fclose (ostream);
|
||
return 0;
|
||
}
|
||
|
||
/* For each file, make two line buffers.
|
||
Also, for each file, there is an element of `thisline'
|
||
which points at any time to one of the file's two buffers,
|
||
and an element of `prevline' which points to the other buffer.
|
||
`thisline' is supposed to point to the next available line from the file,
|
||
while `prevline' holds the last file line used,
|
||
which is remembered so that we can verify that the file is properly sorted. */
|
||
|
||
/* lb1 and lb2 contain one buffer each per file */
|
||
lb1 = (struct linebuffer *) xmalloc (nfiles * sizeof (struct linebuffer));
|
||
lb2 = (struct linebuffer *) xmalloc (nfiles * sizeof (struct linebuffer));
|
||
|
||
/* thisline[i] points to the linebuffer holding the next available line in file i,
|
||
or is zero if there are no lines left in that file. */
|
||
thisline = (struct linebuffer **) xmalloc (nfiles * sizeof (struct linebuffer *));
|
||
/* prevline[i] points to the linebuffer holding the last used line from file i.
|
||
This is just for verifying that file i is properly sorted. */
|
||
prevline = (struct linebuffer **) xmalloc (nfiles * sizeof (struct linebuffer *));
|
||
/* streams[i] holds the input stream for file i. */
|
||
streams = (FILE **) xmalloc (nfiles * sizeof (FILE *));
|
||
/* file_lossage[i] is nonzero if we already know file i is not properly sorted. */
|
||
file_lossage = (int *) xmalloc (nfiles * sizeof (int));
|
||
|
||
/* Allocate and initialize all that storage */
|
||
|
||
for (i = 0; i < nfiles; i++)
|
||
{
|
||
initbuffer (&lb1[i]);
|
||
initbuffer (&lb2[i]);
|
||
thisline[i] = &lb1[i];
|
||
prevline[i] = &lb2[i];
|
||
file_lossage[i] = 0;
|
||
streams[i] = fopen (infiles[i], "r");
|
||
if (!streams[i])
|
||
pfatal_with_name (infiles[i]);
|
||
|
||
readline (thisline[i], streams[i]);
|
||
}
|
||
|
||
/* Keep count of number of files not at eof */
|
||
nleft = nfiles;
|
||
|
||
while (nleft)
|
||
{
|
||
struct linebuffer *best = 0;
|
||
struct linebuffer *exch;
|
||
int bestfile = -1;
|
||
int i;
|
||
|
||
/* Look at the next avail line of each file; choose the least one. */
|
||
|
||
for (i = 0; i < nfiles; i++)
|
||
{
|
||
if (thisline[i] &&
|
||
(!best ||
|
||
0 < compare_general (best->buffer, thisline[i]->buffer,
|
||
(long) bestfile, (long) i, num_keyfields)))
|
||
{
|
||
best = thisline[i];
|
||
bestfile = i;
|
||
}
|
||
}
|
||
|
||
/* Output that line, unless it matches the previous one and we don't want duplicates */
|
||
|
||
if (!(prev_out &&
|
||
!compare_general (prev_out->buffer, best->buffer, 0L, 1L, num_keyfields - 1)))
|
||
indexify (best->buffer, ostream);
|
||
prev_out = best;
|
||
|
||
/* Now make the line the previous of its file, and fetch a new line from that file */
|
||
|
||
exch = prevline[bestfile];
|
||
prevline[bestfile] = thisline[bestfile];
|
||
thisline[bestfile] = exch;
|
||
|
||
while (1)
|
||
{
|
||
/* If the file has no more, mark it empty */
|
||
|
||
if (feof (streams[bestfile]))
|
||
{
|
||
thisline[bestfile] = 0;
|
||
nleft--; /* Update the number of files still not empty */
|
||
break;
|
||
}
|
||
readline (thisline[bestfile], streams[bestfile]);
|
||
if (thisline[bestfile]->buffer[0] || !feof (streams[bestfile])) break;
|
||
}
|
||
}
|
||
|
||
finish_index (ostream);
|
||
|
||
/* Free all storage and close all input streams */
|
||
|
||
for (i = 0; i < nfiles; i++)
|
||
{
|
||
fclose (streams[i]);
|
||
free (lb1[i].buffer);
|
||
free (lb2[i].buffer);
|
||
}
|
||
free (file_lossage);
|
||
free (lb1);
|
||
free (lb2);
|
||
free (thisline);
|
||
free (prevline);
|
||
free (streams);
|
||
|
||
if (outfile)
|
||
fclose (ostream);
|
||
|
||
return lossage;
|
||
}
|
||
|
||
/* Print error message and exit. */
|
||
|
||
fatal (s1, s2)
|
||
char *s1, *s2;
|
||
{
|
||
error (s1, s2);
|
||
exit (EXIT_FATAL);
|
||
}
|
||
|
||
/* Print error message. `s1' is printf control string, `s2' is arg for it. */
|
||
|
||
error (s1, s2)
|
||
char *s1, *s2;
|
||
{
|
||
printf ("texindex: ");
|
||
printf (s1, s2);
|
||
printf ("\n");
|
||
}
|
||
|
||
perror_with_name (name)
|
||
char *name;
|
||
{
|
||
char *s;
|
||
|
||
if (errno < sys_nerr)
|
||
s = concat ("", sys_errlist[errno], " for %s");
|
||
else
|
||
s = "cannot open %s";
|
||
error (s, name);
|
||
}
|
||
|
||
pfatal_with_name (name)
|
||
char *name;
|
||
{
|
||
char *s;
|
||
|
||
if (errno < sys_nerr)
|
||
s = concat ("", sys_errlist[errno], " for %s");
|
||
else
|
||
s = "cannot open %s";
|
||
fatal (s, name);
|
||
}
|
||
|
||
/* Return a newly-allocated string whose contents concatenate those of s1, s2, s3. */
|
||
|
||
char *
|
||
concat (s1, s2, s3)
|
||
char *s1, *s2, *s3;
|
||
{
|
||
int len1 = strlen (s1), len2 = strlen (s2), len3 = strlen (s3);
|
||
char *result = (char *) xmalloc (len1 + len2 + len3 + 1);
|
||
|
||
strcpy (result, s1);
|
||
strcpy (result + len1, s2);
|
||
strcpy (result + len1 + len2, s3);
|
||
*(result + len1 + len2 + len3) = 0;
|
||
|
||
return result;
|
||
}
|
||
|
||
/* Like malloc but get fatal error if memory is exhausted. */
|
||
|
||
int
|
||
xmalloc (size)
|
||
int size;
|
||
{
|
||
int result = malloc (size);
|
||
if (!result)
|
||
fatal ("virtual memory exhausted", 0);
|
||
return result;
|
||
}
|
||
|
||
|
||
int
|
||
xrealloc (ptr, size)
|
||
char *ptr;
|
||
int size;
|
||
{
|
||
int result = realloc (ptr, size);
|
||
if (!result)
|
||
fatal ("virtual memory exhausted");
|
||
return result;
|
||
}
|
||
|
||
bzero (b, length)
|
||
register char *b;
|
||
register int length;
|
||
{
|
||
#ifdef VMS
|
||
short zero = 0;
|
||
long max_str = 65535;
|
||
long len;
|
||
|
||
while (length > max_str)
|
||
{
|
||
(void) LIB$MOVC5 (&zero, &zero, &zero, &max_str, b);
|
||
length -= max_str;
|
||
b += max_str;
|
||
}
|
||
len = length;
|
||
(void) LIB$MOVC5 (&zero, &zero, &zero, &len, b);
|
||
#else
|
||
while (length-- > 0)
|
||
*b++ = 0;
|
||
#endif /* not VMS */
|
||
}
|