1762 lines
43 KiB
C
1762 lines
43 KiB
C
/* Prepare TeX index dribble output into an actual index.
|
||
$Id: texindex.c,v 1.1.1.1 1999/02/11 03:57:24 tv Exp $
|
||
|
||
Copyright (C) 1987, 91, 92, 96, 97, 98 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307. */
|
||
|
||
#include "system.h"
|
||
#include <getopt.h>
|
||
|
||
#if defined (emacs)
|
||
# include "../src/config.h"
|
||
/* Some s/os.h files redefine these. */
|
||
# undef read
|
||
# undef close
|
||
# undef write
|
||
# undef open
|
||
#endif
|
||
|
||
#if !defined (HAVE_MEMSET)
|
||
#undef memset
|
||
#define memset(ptr, ignore, count) bzero (ptr, count)
|
||
#endif
|
||
|
||
|
||
char *mktemp ();
|
||
|
||
#if defined (VMS)
|
||
# include <file.h>
|
||
# define TI_NO_ERROR ((1 << 28) | 1)
|
||
# define TI_FATAL_ERROR ((1 << 28) | 4)
|
||
# define unlink delete
|
||
#else /* !VMS */
|
||
# define TI_NO_ERROR 0
|
||
# define TI_FATAL_ERROR 1
|
||
#endif /* !VMS */
|
||
|
||
#if !defined (SEEK_SET)
|
||
# define SEEK_SET 0
|
||
# define SEEK_CUR 1
|
||
# define SEEK_END 2
|
||
#endif /* !SEEK_SET */
|
||
|
||
/* When sorting in core, this structure describes one line
|
||
and the position and length of its first keyfield. */
|
||
struct lineinfo
|
||
{
|
||
char *text; /* The actual text of the line. */
|
||
union {
|
||
char *text; /* The start of the key (for textual comparison). */
|
||
long number; /* The numeric value (for numeric comparison). */
|
||
} key;
|
||
long keylen; /* Length of KEY field. */
|
||
};
|
||
|
||
/* This structure describes a field to use as a sort key. */
|
||
struct keyfield
|
||
{
|
||
int startwords; /* Number of words to skip. */
|
||
int startchars; /* Number of additional chars to skip. */
|
||
int endwords; /* Number of words to ignore at end. */
|
||
int endchars; /* Ditto for characters of last word. */
|
||
char ignore_blanks; /* Non-zero means ignore spaces and tabs. */
|
||
char fold_case; /* Non-zero means case doesn't matter. */
|
||
char reverse; /* Non-zero means compare in reverse order. */
|
||
char numeric; /* Non-zeros means field is ASCII numeric. */
|
||
char positional; /* Sort according to file position. */
|
||
char braced; /* Count balanced-braced groupings as fields. */
|
||
};
|
||
|
||
/* Vector of keyfields to use. */
|
||
struct keyfield keyfields[3];
|
||
|
||
/* Number of keyfields stored in that vector. */
|
||
int num_keyfields = 3;
|
||
|
||
/* Vector of input file names, terminated with a null pointer. */
|
||
char **infiles;
|
||
|
||
/* Vector of corresponding output file names, or NULL, meaning default it
|
||
(add an `s' to the end). */
|
||
char **outfiles;
|
||
|
||
/* Length of `infiles'. */
|
||
int num_infiles;
|
||
|
||
/* Pointer to the array of pointers to lines being sorted. */
|
||
char **linearray;
|
||
|
||
/* The allocated length of `linearray'. */
|
||
long nlines;
|
||
|
||
/* Directory to use for temporary files. On Unix, it ends with a slash. */
|
||
char *tempdir;
|
||
|
||
/* Start of filename to use for temporary files. */
|
||
char *tempbase;
|
||
|
||
/* Number of last temporary file. */
|
||
int tempcount;
|
||
|
||
/* Number of last temporary file already deleted.
|
||
Temporary files are deleted by `flush_tempfiles' in order of creation. */
|
||
int last_deleted_tempcount;
|
||
|
||
/* During in-core sort, this points to the base of the data block
|
||
which contains all the lines of data. */
|
||
char *text_base;
|
||
|
||
/* Additional command switches .*/
|
||
|
||
/* Nonzero means do not delete tempfiles -- for debugging. */
|
||
int keep_tempfiles;
|
||
|
||
/* The name this program was run with. */
|
||
char *program_name;
|
||
|
||
/* Forward declarations of functions in this file. */
|
||
|
||
void decode_command ();
|
||
void sort_in_core ();
|
||
void sort_offline ();
|
||
char **parsefile ();
|
||
char *find_field ();
|
||
char *find_pos ();
|
||
long find_value ();
|
||
char *find_braced_pos ();
|
||
char *find_braced_end ();
|
||
void writelines ();
|
||
int compare_field ();
|
||
int compare_full ();
|
||
long readline ();
|
||
int merge_files ();
|
||
int merge_direct ();
|
||
void pfatal_with_name ();
|
||
void fatal ();
|
||
void error ();
|
||
void *xmalloc (), *xrealloc ();
|
||
char *concat ();
|
||
char *maketempname ();
|
||
void flush_tempfiles ();
|
||
char *tempcopy ();
|
||
|
||
#define MAX_IN_CORE_SORT 500000
|
||
|
||
int
|
||
main (argc, argv)
|
||
int argc;
|
||
char **argv;
|
||
{
|
||
int i;
|
||
|
||
tempcount = 0;
|
||
last_deleted_tempcount = 0;
|
||
|
||
program_name = strrchr (argv[0], '/');
|
||
if (program_name != (char *)NULL)
|
||
program_name++;
|
||
else
|
||
program_name = argv[0];
|
||
|
||
#ifdef HAVE_SETLOCALE
|
||
/* Set locale via LC_ALL. */
|
||
setlocale (LC_ALL, "");
|
||
#endif
|
||
|
||
/* Set the text message domain. */
|
||
bindtextdomain (PACKAGE, LOCALEDIR);
|
||
textdomain (PACKAGE);
|
||
|
||
/* Describe the kind of sorting to do. */
|
||
/* The first keyfield uses the first braced field and folds case. */
|
||
keyfields[0].braced = 1;
|
||
keyfields[0].fold_case = 1;
|
||
keyfields[0].endwords = -1;
|
||
keyfields[0].endchars = -1;
|
||
|
||
/* The second keyfield uses the second braced field, numerically. */
|
||
keyfields[1].braced = 1;
|
||
keyfields[1].numeric = 1;
|
||
keyfields[1].startwords = 1;
|
||
keyfields[1].endwords = -1;
|
||
keyfields[1].endchars = -1;
|
||
|
||
/* The third keyfield (which is ignored while discarding duplicates)
|
||
compares the whole line. */
|
||
keyfields[2].endwords = -1;
|
||
keyfields[2].endchars = -1;
|
||
|
||
decode_command (argc, argv);
|
||
|
||
tempbase = mktemp (concat ("txiXXXXXX", "", ""));
|
||
|
||
/* Process input files completely, one by one. */
|
||
|
||
for (i = 0; i < num_infiles; i++)
|
||
{
|
||
int desc;
|
||
long ptr;
|
||
char *outfile;
|
||
|
||
desc = open (infiles[i], O_RDONLY, 0);
|
||
if (desc < 0)
|
||
pfatal_with_name (infiles[i]);
|
||
lseek (desc, (off_t) 0, SEEK_END);
|
||
ptr = (long) lseek (desc, (off_t) 0, SEEK_CUR);
|
||
|
||
close (desc);
|
||
|
||
outfile = outfiles[i];
|
||
if (!outfile)
|
||
{
|
||
outfile = concat (infiles[i], "s", "");
|
||
}
|
||
|
||
if (ptr < MAX_IN_CORE_SORT)
|
||
/* Sort a small amount of data. */
|
||
sort_in_core (infiles[i], ptr, outfile);
|
||
else
|
||
sort_offline (infiles[i], ptr, outfile);
|
||
}
|
||
|
||
flush_tempfiles (tempcount);
|
||
exit (TI_NO_ERROR);
|
||
|
||
return 0; /* Avoid bogus warnings. */
|
||
}
|
||
|
||
typedef struct
|
||
{
|
||
char *long_name;
|
||
char *short_name;
|
||
int *variable_ref;
|
||
int variable_value;
|
||
char *arg_name;
|
||
char *doc_string;
|
||
} TEXINDEX_OPTION;
|
||
|
||
TEXINDEX_OPTION texindex_options[] = {
|
||
{ "--keep", "-k", &keep_tempfiles, 1, (char *)NULL,
|
||
N_("keep temporary files around after processing") },
|
||
{ "--no-keep", 0, &keep_tempfiles, 0, (char *)NULL,
|
||
N_("do not keep temporary files around after processing (default)") },
|
||
{ "--output", "-o", (int *)NULL, 0, "FILE",
|
||
N_("send output to FILE") },
|
||
{ "--version", (char *)NULL, (int *)NULL, 0, (char *)NULL,
|
||
N_("display version information and exit") },
|
||
{ "--help", "-h", (int *)NULL, 0, (char *)NULL,
|
||
N_("display this help and exit") },
|
||
{ (char *)NULL, (char *)NULL, (int *)NULL, 0, (char *)NULL }
|
||
};
|
||
|
||
void
|
||
usage (result_value)
|
||
int result_value;
|
||
{
|
||
register int i;
|
||
FILE *f = result_value ? stderr : stdout;
|
||
|
||
fprintf (f, _("Usage: %s [OPTION]... FILE...\n"), program_name);
|
||
fprintf (f, _("Generate a sorted index for each TeX output FILE.\n"));
|
||
/* Avoid trigraph nonsense. */
|
||
fprintf (f, _("Usually FILE... is `foo.??\' for a document `foo.texi'.\n"));
|
||
fprintf (f, _("\nOptions:\n"));
|
||
|
||
for (i = 0; texindex_options[i].long_name; i++)
|
||
{
|
||
if (texindex_options[i].short_name)
|
||
fprintf (f, "%s, ", texindex_options[i].short_name);
|
||
|
||
fprintf (f, "%s %s",
|
||
texindex_options[i].long_name,
|
||
texindex_options[i].arg_name
|
||
? texindex_options[i].arg_name : "");
|
||
|
||
fprintf (f, "\t%s\n", _(texindex_options[i].doc_string));
|
||
}
|
||
puts (_("\nEmail bug reports to bug-texinfo@gnu.org."));
|
||
|
||
exit (result_value);
|
||
}
|
||
|
||
/* Decode the command line arguments to set the parameter variables
|
||
and set up the vector of keyfields and the vector of input files. */
|
||
|
||
void
|
||
decode_command (argc, argv)
|
||
int argc;
|
||
char **argv;
|
||
{
|
||
int arg_index = 1;
|
||
char **ip;
|
||
char **op;
|
||
|
||
/* Store default values into parameter variables. */
|
||
|
||
tempdir = getenv ("TMPDIR");
|
||
#ifdef VMS
|
||
if (tempdir == NULL)
|
||
tempdir = "sys$scratch:";
|
||
#else
|
||
if (tempdir == NULL)
|
||
tempdir = "/tmp/";
|
||
else
|
||
tempdir = concat (tempdir, "/", "");
|
||
#endif
|
||
|
||
keep_tempfiles = 0;
|
||
|
||
/* Allocate ARGC input files, which must be enough. */
|
||
|
||
infiles = (char **) xmalloc (argc * sizeof (char *));
|
||
outfiles = (char **) xmalloc (argc * sizeof (char *));
|
||
ip = infiles;
|
||
op = outfiles;
|
||
|
||
while (arg_index < argc)
|
||
{
|
||
char *arg = argv[arg_index++];
|
||
|
||
if (*arg == '-')
|
||
{
|
||
if (strcmp (arg, "--version") == 0)
|
||
{
|
||
printf ("texindex (GNU %s) %s\n", PACKAGE, VERSION);
|
||
printf (_("Copyright (C) %s Free Software Foundation, Inc.\n\
|
||
There is NO warranty. You may redistribute this software\n\
|
||
under the terms of the GNU General Public License.\n\
|
||
For more information about these matters, see the files named COPYING.\n"),
|
||
"1998");
|
||
exit (0);
|
||
}
|
||
else if ((strcmp (arg, "--keep") == 0) ||
|
||
(strcmp (arg, "-k") == 0))
|
||
{
|
||
keep_tempfiles = 1;
|
||
}
|
||
else if ((strcmp (arg, "--help") == 0) ||
|
||
(strcmp (arg, "-h") == 0))
|
||
{
|
||
usage (0);
|
||
}
|
||
else if ((strcmp (arg, "--output") == 0) ||
|
||
(strcmp (arg, "-o") == 0))
|
||
{
|
||
if (argv[arg_index] != (char *)NULL)
|
||
{
|
||
arg_index++;
|
||
if (op > outfiles)
|
||
*(op - 1) = argv[arg_index];
|
||
}
|
||
else
|
||
usage (1);
|
||
}
|
||
else
|
||
usage (1);
|
||
}
|
||
else
|
||
{
|
||
*ip++ = arg;
|
||
*op++ = (char *)NULL;
|
||
}
|
||
}
|
||
|
||
/* Record number of keyfields and terminate list of filenames. */
|
||
num_infiles = ip - infiles;
|
||
*ip = (char *)NULL;
|
||
if (num_infiles == 0)
|
||
usage (1);
|
||
}
|
||
|
||
/* Return a name for a temporary file. */
|
||
|
||
char *
|
||
maketempname (count)
|
||
int count;
|
||
{
|
||
char tempsuffix[10];
|
||
sprintf (tempsuffix, "%d", count);
|
||
return concat (tempdir, tempbase, tempsuffix);
|
||
}
|
||
|
||
/* Delete all temporary files up to TO_COUNT. */
|
||
|
||
void
|
||
flush_tempfiles (to_count)
|
||
int to_count;
|
||
{
|
||
if (keep_tempfiles)
|
||
return;
|
||
while (last_deleted_tempcount < to_count)
|
||
unlink (maketempname (++last_deleted_tempcount));
|
||
}
|
||
|
||
/* Copy the input file open on IDESC into a temporary file
|
||
and return the temporary file name. */
|
||
|
||
#define BUFSIZE 1024
|
||
|
||
char *
|
||
tempcopy (idesc)
|
||
int idesc;
|
||
{
|
||
char *outfile = maketempname (++tempcount);
|
||
int odesc;
|
||
char buffer[BUFSIZE];
|
||
|
||
odesc = open (outfile, O_WRONLY | O_CREAT, 0666);
|
||
|
||
if (odesc < 0)
|
||
pfatal_with_name (outfile);
|
||
|
||
while (1)
|
||
{
|
||
int nread = read (idesc, buffer, BUFSIZE);
|
||
write (odesc, buffer, nread);
|
||
if (!nread)
|
||
break;
|
||
}
|
||
|
||
close (odesc);
|
||
|
||
return outfile;
|
||
}
|
||
|
||
/* Compare LINE1 and LINE2 according to the specified set of keyfields. */
|
||
|
||
int
|
||
compare_full (line1, line2)
|
||
char **line1, **line2;
|
||
{
|
||
int i;
|
||
|
||
/* Compare using the first keyfield;
|
||
if that does not distinguish the lines, try the second keyfield;
|
||
and so on. */
|
||
|
||
for (i = 0; i < num_keyfields; i++)
|
||
{
|
||
long length1, length2;
|
||
char *start1 = find_field (&keyfields[i], *line1, &length1);
|
||
char *start2 = find_field (&keyfields[i], *line2, &length2);
|
||
int tem = compare_field (&keyfields[i], start1, length1, *line1 - text_base,
|
||
start2, length2, *line2 - text_base);
|
||
if (tem)
|
||
{
|
||
if (keyfields[i].reverse)
|
||
return -tem;
|
||
return tem;
|
||
}
|
||
}
|
||
|
||
return 0; /* Lines match exactly. */
|
||
}
|
||
|
||
/* Compare LINE1 and LINE2, described by structures
|
||
in which the first keyfield is identified in advance.
|
||
For positional sorting, assumes that the order of the lines in core
|
||
reflects their nominal order. */
|
||
|
||
int
|
||
compare_prepared (line1, line2)
|
||
struct lineinfo *line1, *line2;
|
||
{
|
||
int i;
|
||
int tem;
|
||
char *text1, *text2;
|
||
|
||
/* Compare using the first keyfield, which has been found for us already. */
|
||
if (keyfields->positional)
|
||
{
|
||
if (line1->text - text_base > line2->text - text_base)
|
||
tem = 1;
|
||
else
|
||
tem = -1;
|
||
}
|
||
else if (keyfields->numeric)
|
||
tem = line1->key.number - line2->key.number;
|
||
else
|
||
tem = compare_field (keyfields, line1->key.text, line1->keylen, 0,
|
||
line2->key.text, line2->keylen, 0);
|
||
if (tem)
|
||
{
|
||
if (keyfields->reverse)
|
||
return -tem;
|
||
return tem;
|
||
}
|
||
|
||
text1 = line1->text;
|
||
text2 = line2->text;
|
||
|
||
/* Compare using the second keyfield;
|
||
if that does not distinguish the lines, try the third keyfield;
|
||
and so on. */
|
||
|
||
for (i = 1; i < num_keyfields; i++)
|
||
{
|
||
long length1, length2;
|
||
char *start1 = find_field (&keyfields[i], text1, &length1);
|
||
char *start2 = find_field (&keyfields[i], text2, &length2);
|
||
int tem = compare_field (&keyfields[i], start1, length1, text1 - text_base,
|
||
start2, length2, text2 - text_base);
|
||
if (tem)
|
||
{
|
||
if (keyfields[i].reverse)
|
||
return -tem;
|
||
return tem;
|
||
}
|
||
}
|
||
|
||
return 0; /* Lines match exactly. */
|
||
}
|
||
|
||
/* Like compare_full but more general.
|
||
You can pass any strings, and you can say how many keyfields to use.
|
||
POS1 and POS2 should indicate the nominal positional ordering of
|
||
the two lines in the input. */
|
||
|
||
int
|
||
compare_general (str1, str2, pos1, pos2, use_keyfields)
|
||
char *str1, *str2;
|
||
long pos1, pos2;
|
||
int use_keyfields;
|
||
{
|
||
int i;
|
||
|
||
/* Compare using the first keyfield;
|
||
if that does not distinguish the lines, try the second keyfield;
|
||
and so on. */
|
||
|
||
for (i = 0; i < use_keyfields; i++)
|
||
{
|
||
long length1, length2;
|
||
char *start1 = find_field (&keyfields[i], str1, &length1);
|
||
char *start2 = find_field (&keyfields[i], str2, &length2);
|
||
int tem = compare_field (&keyfields[i], start1, length1, pos1,
|
||
start2, length2, pos2);
|
||
if (tem)
|
||
{
|
||
if (keyfields[i].reverse)
|
||
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 *
|
||
find_field (keyfield, str, lengthptr)
|
||
struct keyfield *keyfield;
|
||
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;
|
||
}
|
||
|
||
/* Return 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)
|
||
/* Do nothing. */ ;
|
||
if (c != '{')
|
||
return p - 1;
|
||
while (bracelevel)
|
||
{
|
||
c = *p++;
|
||
if (c == '{')
|
||
bracelevel++;
|
||
if (c == '}')
|
||
bracelevel--;
|
||
if (c == 0 || c == '\n')
|
||
return p - 1;
|
||
}
|
||
}
|
||
|
||
while ((c = *p++) != '{' && c != '\n' && c)
|
||
/* Do nothing. */ ;
|
||
|
||
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 (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];
|
||
|
||
void
|
||
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;
|
||
|
||
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 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;
|
||
int nfiles;
|
||
long total;
|
||
char *outfile;
|
||
{
|
||
/* More than enough. */
|
||
int ntemps = 2 * (total + MAX_IN_CORE_SORT - 1) / MAX_IN_CORE_SORT;
|
||
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, O_RDONLY, 0);
|
||
|
||
if (desc < 0)
|
||
fatal (_("failure reopening %s"), infile);
|
||
for (file_size = 0;;)
|
||
{
|
||
i = read (desc, data + file_size, total - file_size);
|
||
if (i <= 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;
|
||
/* Length of storage allocated for lastprimary. */
|
||
int lastprimarylength;
|
||
|
||
/* 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);
|
||
memset (lastprimary, '\0', lastprimarylength + 1);
|
||
lastsecondarylength = 100;
|
||
lastsecondary = (char *) xmalloc (lastsecondarylength + 1);
|
||
memset (lastsecondary, '\0', lastsecondarylength + 1);
|
||
}
|
||
|
||
/* Indexify. Merge entries for the same name,
|
||
insert headers for each initial character, etc. */
|
||
|
||
void
|
||
indexify (line, ostream)
|
||
char *line;
|
||
FILE *ostream;
|
||
{
|
||
char *primary, *secondary, *pagenumber;
|
||
int primarylength, secondarylength = 0, pagelength;
|
||
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);
|
||
fputs ("}\n", ostream);
|
||
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')
|
||
/* Do nothing. */ ;
|
||
*(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;
|
||
{
|
||
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;
|
||
/* Update the number of files still not empty. */
|
||
nleft--;
|
||
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. */
|
||
|
||
void
|
||
fatal (format, arg)
|
||
char *format, *arg;
|
||
{
|
||
error (format, arg);
|
||
exit (TI_FATAL_ERROR);
|
||
}
|
||
|
||
/* Print error message. FORMAT is printf control string, ARG is arg for it. */
|
||
void
|
||
error (format, arg)
|
||
char *format, *arg;
|
||
{
|
||
printf ("%s: ", program_name);
|
||
printf (format, arg);
|
||
if (format[strlen (format) -1] != '\n')
|
||
printf ("\n");
|
||
}
|
||
|
||
void
|
||
perror_with_name (name)
|
||
char *name;
|
||
{
|
||
char *s;
|
||
|
||
s = strerror (errno);
|
||
printf ("%s: ", program_name);
|
||
printf ("%s; for file `%s'.\n", s, name);
|
||
}
|
||
|
||
void
|
||
pfatal_with_name (name)
|
||
char *name;
|
||
{
|
||
char *s;
|
||
|
||
s = strerror (errno);
|
||
printf ("%s: ", program_name);
|
||
printf (_("%s; for file `%s'.\n"), s, name);
|
||
exit (TI_FATAL_ERROR);
|
||
}
|
||
|
||
/* 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;
|
||
}
|
||
|
||
#if !defined (HAVE_STRERROR)
|
||
extern char *sys_errlist[];
|
||
extern int sys_nerr;
|
||
|
||
char *
|
||
strerror (num)
|
||
int num;
|
||
{
|
||
if (num >= sys_nerr)
|
||
return ("");
|
||
else
|
||
return (sys_errlist[num]);
|
||
}
|
||
#endif /* !HAVE_STRERROR */
|
||
|
||
#if !defined (HAVE_STRCHR)
|
||
char *
|
||
strrchr (string, character)
|
||
char *string;
|
||
int character;
|
||
{
|
||
register int i;
|
||
|
||
for (i = strlen (string) - 1; i > -1; i--)
|
||
if (string[i] == character)
|
||
return (string + i);
|
||
|
||
return ((char *)NULL);
|
||
}
|
||
#endif /* HAVE_STRCHR */
|
||
|
||
void
|
||
memory_error (callers_name, bytes_wanted)
|
||
char *callers_name;
|
||
int bytes_wanted;
|
||
{
|
||
char printable_string[80];
|
||
|
||
sprintf (printable_string,
|
||
_("Virtual memory exhausted in %s ()! Needed %d bytes."),
|
||
callers_name, bytes_wanted);
|
||
|
||
error (printable_string);
|
||
abort ();
|
||
}
|
||
|
||
/* Just like malloc, but kills the program in case of fatal error. */
|
||
void *
|
||
xmalloc (nbytes)
|
||
int nbytes;
|
||
{
|
||
void *temp = (void *) malloc (nbytes);
|
||
|
||
if (nbytes && temp == (void *)NULL)
|
||
memory_error ("xmalloc", nbytes);
|
||
|
||
return (temp);
|
||
}
|
||
|
||
/* Like realloc (), but barfs if there isn't enough memory. */
|
||
void *
|
||
xrealloc (pointer, nbytes)
|
||
void *pointer;
|
||
int nbytes;
|
||
{
|
||
void *temp;
|
||
|
||
if (!pointer)
|
||
temp = (void *)xmalloc (nbytes);
|
||
else
|
||
temp = (void *)realloc (pointer, nbytes);
|
||
|
||
if (nbytes && !temp)
|
||
memory_error ("xrealloc", nbytes);
|
||
|
||
return (temp);
|
||
}
|