73 lines
1.5 KiB
C
73 lines
1.5 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 void getlines(FILE *, const char *);
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static bool rflag = false;
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static bool uflag = false;
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static char **lines = NULL;
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static long nlines = 0;
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int
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main(int argc, char *argv[])
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{
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char c;
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long i;
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FILE *fp;
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while((c = getopt(argc, argv, "ru")) != -1)
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switch(c) {
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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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exit(EXIT_FAILURE);
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}
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if(optind == argc)
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getlines(stdin, "<stdin>");
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else for(; optind < argc; optind++) {
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if(!(fp = fopen(argv[optind], "r")))
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eprintf("fopen %s:", argv[optind]);
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getlines(fp, argv[optind]);
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fclose(fp);
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}
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qsort(lines, nlines, sizeof *lines, (int (*)(const void *, const void *))linecmp);
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for(i = 0; i < nlines; i++)
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if(!uflag || i == 0 || strcmp(lines[i], lines[i-1]) != 0)
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fputs(lines[i], stdout);
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return EXIT_SUCCESS;
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}
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void
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getlines(FILE *fp, const char *str)
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{
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char *line = NULL;
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size_t size = 0;
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while(afgets(&line, &size, fp)) {
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if(!(lines = realloc(lines, ++nlines * sizeof *lines)))
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eprintf("realloc:");
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if(!(lines[nlines-1] = malloc(strlen(line)+1)))
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eprintf("malloc:");
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strcpy(lines[nlines-1], line);
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}
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free(line);
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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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return strcmp(*a, *b) * (rflag ? -1 : +1);
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}
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