99 lines
1.6 KiB
C
99 lines
1.6 KiB
C
/* See LICENSE file for copyright and license details. */
|
|
#include <stdbool.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <unistd.h>
|
|
|
|
#include "text.h"
|
|
#include "util.h"
|
|
|
|
static void uniq_line(char *);
|
|
static void uniq(FILE *, const char *);
|
|
static void uniq_finish(void);
|
|
|
|
static const char *countfmt = "";
|
|
static bool dflag = false;
|
|
static bool uflag = false;
|
|
|
|
static char *prev_line = NULL;
|
|
static long prev_line_count = 0;
|
|
|
|
int
|
|
main(int argc, char *argv[])
|
|
{
|
|
int c;
|
|
FILE *fp;
|
|
|
|
while((c = getopt(argc, argv, "cdu")) != -1)
|
|
switch(c) {
|
|
case 'c':
|
|
countfmt = "%7ld ";
|
|
break;
|
|
case 'd':
|
|
dflag = true;
|
|
break;
|
|
case 'u':
|
|
uflag = true;
|
|
break;
|
|
default:
|
|
exit(2);
|
|
}
|
|
|
|
if(optind == argc)
|
|
uniq(stdin, "<stdin>");
|
|
else if(optind == argc - 1) {
|
|
if(!(fp = fopen(argv[optind], "r")))
|
|
eprintf("fopen %s:", argv[optind]);
|
|
uniq(fp, argv[optind]);
|
|
fclose(fp);
|
|
} else
|
|
enprintf(2, "too many arguments\n");
|
|
uniq_finish();
|
|
|
|
return EXIT_SUCCESS;
|
|
}
|
|
|
|
void
|
|
uniq_line(char *l)
|
|
{
|
|
bool lines_equal = ((l == NULL) || (prev_line == NULL))
|
|
? l == prev_line
|
|
: !strcmp(l, prev_line);
|
|
|
|
if(lines_equal) {
|
|
++prev_line_count;
|
|
return;
|
|
}
|
|
|
|
if(prev_line != NULL) {
|
|
if((prev_line_count == 1 && !dflag) ||
|
|
(prev_line_count != 1 && !uflag)) {
|
|
printf(countfmt, prev_line_count);
|
|
fputs(prev_line, stdout);
|
|
}
|
|
free(prev_line);
|
|
prev_line = NULL;
|
|
}
|
|
|
|
if(l && !(prev_line = strdup(l)))
|
|
eprintf("strdup:");
|
|
prev_line_count = 1;
|
|
}
|
|
|
|
void
|
|
uniq(FILE *fp, const char *str)
|
|
{
|
|
char *buf = NULL;
|
|
size_t size = 0;
|
|
|
|
while(afgets(&buf, &size, fp))
|
|
uniq_line(buf);
|
|
}
|
|
|
|
void
|
|
uniq_finish()
|
|
{
|
|
uniq_line(NULL);
|
|
}
|