80 lines
1.7 KiB
C
80 lines
1.7 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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struct linebuf {
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char **lines;
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long nlines;
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long capacity;
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};
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#define EMPTY_LINEBUF {NULL, 0, 0,}
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static struct linebuf linebuf = EMPTY_LINEBUF;
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static void getlines(FILE *, struct linebuf *);
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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(2);
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}
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if(optind == argc)
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getlines(stdin, &linebuf);
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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, &linebuf);
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fclose(fp);
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}
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qsort(linebuf.lines, linebuf.nlines, sizeof *linebuf.lines, (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], linebuf.lines[i-1]) != 0)
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fputs(linebuf.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, struct linebuf *b)
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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(++b->nlines > b->capacity && !(b->lines = realloc(b->lines, (b->capacity+=512) * sizeof *b->lines)))
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eprintf("realloc:");
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if(!(b->lines[b->nlines-1] = malloc(strlen(line)+1)))
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eprintf("malloc:");
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strcpy(b->lines[b->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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