101 lines
2.0 KiB
C
101 lines
2.0 KiB
C
/* vim: tabstop=4 shiftwidth=4 noexpandtab
|
|
* This file is part of ToaruOS and is released under the terms
|
|
* of the NCSA / University of Illinois License - see LICENSE.md
|
|
* Copyright (C) 2018 K. Lange
|
|
*
|
|
* sort - Sort standard in or files.
|
|
*
|
|
* Currently implemented with a naive insertion sort.
|
|
*/
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <unistd.h>
|
|
#include <string.h>
|
|
#include <getopt.h>
|
|
#include <errno.h>
|
|
#include <ctype.h>
|
|
#include <toaru/list.h>
|
|
|
|
int compare(const char * a, const char * b) {
|
|
while (1) {
|
|
while (*a == *b || tolower(*a) == tolower(*b)) {
|
|
if (!*a) return 0;
|
|
a++;
|
|
b++;
|
|
}
|
|
|
|
while (*a && !isalnum(*a)) a++;
|
|
while (*b && !isalnum(*b)) b++;
|
|
|
|
if (tolower(*a) == tolower(*b)) continue;
|
|
|
|
if (tolower(*a) < tolower(*b)) return -1;
|
|
return 1;
|
|
}
|
|
}
|
|
|
|
int main(int argc, char * argv[]) {
|
|
int reverse = 0;
|
|
int opt;
|
|
|
|
list_t * lines = list_create();
|
|
list_t * files = list_create();
|
|
|
|
while ((opt = getopt(argc, argv, "r")) != -1) {
|
|
switch (opt) {
|
|
case 'r':
|
|
reverse = 1;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (optind == argc) {
|
|
/* No arguments */
|
|
list_insert(files, stdin);
|
|
} else {
|
|
while (optind < argc) {
|
|
FILE * f = fopen(argv[optind], "r");
|
|
if (!f) {
|
|
fprintf(stderr, "%s: %s: %s\n", argv[0], argv[optind], strerror(errno));
|
|
} else {
|
|
list_insert(files, f);
|
|
}
|
|
optind++;
|
|
}
|
|
}
|
|
|
|
char line_buf[4096] = {0};
|
|
foreach (node, files) {
|
|
FILE * f = node->value;
|
|
while (!feof(f)) {
|
|
if (!fgets(line_buf, 4096, f)) {
|
|
break;
|
|
}
|
|
if (!strchr(line_buf,'\n')) {
|
|
fprintf(stderr, "%s: oversized line\n", argv[0]);
|
|
}
|
|
char * line = strdup(line_buf);
|
|
node_t * next = NULL;
|
|
foreach (lnode, lines) {
|
|
char * cmp = lnode->value;
|
|
if (reverse ? (compare(cmp, line) < 0) : (compare(line, cmp) < 0)) {
|
|
next = lnode;
|
|
break;
|
|
}
|
|
}
|
|
if (next) {
|
|
list_insert_before(lines, next, line);
|
|
} else {
|
|
list_insert(lines, line);
|
|
}
|
|
}
|
|
}
|
|
|
|
foreach (lnode, lines) {
|
|
char * line = lnode->value;
|
|
fprintf(stdout, "%s", line);
|
|
}
|
|
|
|
return 0;
|
|
}
|