sbase/sort.c

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