107 lines
2.6 KiB
C
107 lines
2.6 KiB
C
/* vi: set sw=4 ts=4: */
|
|
/*
|
|
* Mini sort implementation for busybox
|
|
*
|
|
*
|
|
* Copyright (C) 2000 by Matt Kraai <kraai@alumni.carnegiemellon.edu>
|
|
*
|
|
* 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 of the License, 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 USA
|
|
*
|
|
*/
|
|
|
|
#include <getopt.h>
|
|
#include <string.h>
|
|
#include <stdlib.h>
|
|
#include "busybox.h"
|
|
|
|
static int compare_ascii(const void *x, const void *y)
|
|
{
|
|
return strcmp(*(char **)x, *(char **)y);
|
|
}
|
|
|
|
static int compare_numeric(const void *x, const void *y)
|
|
{
|
|
int z = atoi(*(char **)x) - atoi(*(char **)y);
|
|
return z ? z : strcmp(*(char **)x, *(char **)y);
|
|
}
|
|
|
|
int sort_main(int argc, char **argv)
|
|
{
|
|
FILE *fp;
|
|
char *line, **lines = NULL;
|
|
int i, opt, nlines = 0;
|
|
int (*compare)(const void *, const void *) = compare_ascii;
|
|
#ifdef CONFIG_FEATURE_SORT_REVERSE
|
|
int reverse = FALSE;
|
|
#endif
|
|
#ifdef CONFIG_FEATURE_SORT_UNIQUE
|
|
int unique = FALSE;
|
|
#endif
|
|
|
|
while ((opt = getopt(argc, argv, "nru")) != -1) {
|
|
switch (opt) {
|
|
case 'n':
|
|
compare = compare_numeric;
|
|
break;
|
|
#ifdef CONFIG_FEATURE_SORT_REVERSE
|
|
case 'r':
|
|
reverse = TRUE;
|
|
break;
|
|
#endif
|
|
#ifdef CONFIG_FEATURE_SORT_UNIQUE
|
|
case 'u':
|
|
unique = TRUE;
|
|
break;
|
|
#endif
|
|
default:
|
|
show_usage();
|
|
}
|
|
}
|
|
|
|
/* read the input */
|
|
for (i = optind; i == optind || i < argc; i++) {
|
|
if (argv[i] == NULL)
|
|
fp = stdin;
|
|
else
|
|
fp = xfopen(argv[i], "r");
|
|
|
|
while ((line = get_line_from_file(fp)) != NULL) {
|
|
lines = xrealloc(lines, sizeof(char *) * (nlines + 1));
|
|
chomp(line);
|
|
lines[nlines++] = line;
|
|
}
|
|
}
|
|
|
|
/* sort it */
|
|
qsort(lines, nlines, sizeof(char *), compare);
|
|
|
|
/* print it */
|
|
#ifdef CONFIG_FEATURE_SORT_REVERSE
|
|
if (reverse) {
|
|
for (i = --nlines; 0 <= i; i--)
|
|
#ifdef CONFIG_FEATURE_SORT_UNIQUE
|
|
if((!unique) || (i == nlines) || (strcmp(lines[i + 1], lines[i])))
|
|
#endif
|
|
puts(lines[i]);
|
|
} else
|
|
#endif
|
|
for (i = 0; i < nlines; i++)
|
|
#ifdef CONFIG_FEATURE_SORT_UNIQUE
|
|
if((!unique) || (!i) || (strcmp(lines[i - 1], lines[i])))
|
|
#endif
|
|
puts(lines[i]);
|
|
return EXIT_SUCCESS;
|
|
}
|