79 lines
1.4 KiB
C
79 lines
1.4 KiB
C
/* See LICENSE file for copyright and license details. */
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#include <stdbool.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include "text.h"
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#include "util.h"
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static int linecmp(const char **, const char **);
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static bool rflag = false;
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static bool uflag = false;
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static bool nflag = false;
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static struct linebuf linebuf = EMPTY_LINEBUF;
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static void
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usage(void)
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{
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eprintf("usage: %s [-nru] [file...]\n", argv0);
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}
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int
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main(int argc, char *argv[])
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{
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long i;
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FILE *fp;
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ARGBEGIN {
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case 'n':
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nflag = true;
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break;
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case 'r':
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rflag = true;
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break;
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case 'u':
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uflag = true;
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break;
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default:
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usage();
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} ARGEND;
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if(argc == 0) {
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getlines(stdin, &linebuf);
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} else for(; argc > 0; argc--, argv++) {
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if(!(fp = fopen(argv[0], "r"))) {
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weprintf("fopen %s:", argv[0]);
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continue;
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}
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getlines(fp, &linebuf);
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fclose(fp);
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}
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qsort(linebuf.lines, linebuf.nlines, sizeof *linebuf.lines,
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(int (*)(const void *, const void *))linecmp);
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for(i = 0; i < linebuf.nlines; i++) {
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if(!uflag || i == 0 || strcmp(linebuf.lines[i],
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linebuf.lines[i-1]) != 0) {
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fputs(linebuf.lines[i], stdout);
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}
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}
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return EXIT_SUCCESS;
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}
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int
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linecmp(const char **a, const char **b)
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{
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if (nflag) {
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if (rflag)
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return strtoul(*b, 0, 10) - strtoul(*a, 0, 10);
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else
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return strtoul(*a, 0, 10) - strtoul(*b, 0, 10);
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}
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return strcmp(*a, *b) * (rflag ? -1 : +1);
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}
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