sbase/uniq.c

104 lines
1.6 KiB
C
Raw Normal View History

2012-05-21 23:24:28 +00:00
/* See LICENSE file for copyright and license details. */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
2013-03-05 20:35:55 +00:00
2012-05-21 23:24:28 +00:00
#include "text.h"
#include "util.h"
2014-01-20 10:47:46 +00:00
static void uniqline(char *);
2012-05-21 23:24:28 +00:00
static void uniq(FILE *, const char *);
2014-01-20 10:47:46 +00:00
static void uniqfinish(void);
2012-05-21 23:24:28 +00:00
static const char *countfmt = "";
static int dflag = 0;
static int uflag = 0;
2012-05-21 23:24:28 +00:00
2014-01-20 10:47:46 +00:00
static char *prevline = NULL;
static long prevlinecount = 0;
2012-05-21 23:24:28 +00:00
2013-06-14 18:20:47 +00:00
static void
usage(void)
{
eprintf("usage: %s [-cdiu] [input]]\n", argv0);
2013-06-14 18:20:47 +00:00
}
2012-05-21 23:24:28 +00:00
int
main(int argc, char *argv[])
{
FILE *fp;
2013-06-14 18:20:47 +00:00
ARGBEGIN {
case 'i':
eprintf("not implemented\n");
2013-06-14 18:20:47 +00:00
case 'c':
countfmt = "%7ld ";
break;
case 'd':
dflag = 1;
2013-06-14 18:20:47 +00:00
break;
case 'u':
uflag = 1;
2013-06-14 18:20:47 +00:00
break;
default:
usage();
} ARGEND;
2012-05-21 23:24:28 +00:00
if (argc == 0) {
2012-05-21 23:24:28 +00:00
uniq(stdin, "<stdin>");
} else if (argc == 1) {
if (!(fp = fopen(argv[0], "r")))
2013-06-14 18:20:47 +00:00
eprintf("fopen %s:", argv[0]);
uniq(fp, argv[0]);
2012-05-21 23:24:28 +00:00
fclose(fp);
} else
2013-06-14 18:20:47 +00:00
usage();
2014-01-20 10:47:46 +00:00
uniqfinish();
2012-05-21 23:24:28 +00:00
2014-10-02 22:46:04 +00:00
return 0;
2012-05-21 23:24:28 +00:00
}
static void
2014-01-20 10:47:46 +00:00
uniqline(char *l)
2012-05-21 23:24:28 +00:00
{
int linesequel = (!l || !prevline)
2014-01-20 10:47:46 +00:00
? l == prevline
: !strcmp(l, prevline);
2012-05-21 23:24:28 +00:00
if (linesequel) {
2014-01-20 10:47:46 +00:00
++prevlinecount;
2012-05-21 23:24:28 +00:00
return;
}
if (prevline) {
if ((prevlinecount == 1 && !dflag) ||
(prevlinecount != 1 && !uflag)) {
2014-01-20 10:47:46 +00:00
printf(countfmt, prevlinecount);
fputs(prevline, stdout);
2012-05-21 23:24:28 +00:00
}
2014-01-20 10:47:46 +00:00
free(prevline);
prevline = NULL;
2012-05-21 23:24:28 +00:00
}
if (l && !(prevline = strdup(l)))
2012-05-21 23:24:28 +00:00
eprintf("strdup:");
2014-01-20 10:47:46 +00:00
prevlinecount = 1;
2012-05-21 23:24:28 +00:00
}
static void
2012-05-21 23:24:28 +00:00
uniq(FILE *fp, const char *str)
{
char *buf = NULL;
size_t size = 0;
while (agetline(&buf, &size, fp) != -1)
2014-01-20 10:47:46 +00:00
uniqline(buf);
2012-05-21 23:24:28 +00:00
}
static void
uniqfinish(void)
2012-05-21 23:24:28 +00:00
{
2014-01-20 10:47:46 +00:00
uniqline(NULL);
2012-05-21 23:24:28 +00:00
}