mirror of
https://github.com/git/git.git
synced 2024-11-24 02:17:02 +08:00
7365c95d2d
Even though the function is generic enough, <anything>sort() inherits connotations from the standard function qsort() that sorts an array. Rename it to llist_mergesort() and describe the external interface in its header file. This incidentally avoids name clashes with mergesort() some platforms declare in, and contaminate user namespace with, their <stdlib.h>. Reported-by: Brian Gernhardt Signed-off-by: Junio C Hamano <gitster@pobox.com>
53 lines
930 B
C
53 lines
930 B
C
#include "cache.h"
|
|
#include "mergesort.h"
|
|
|
|
struct line {
|
|
char *text;
|
|
struct line *next;
|
|
};
|
|
|
|
static void *get_next(const void *a)
|
|
{
|
|
return ((const struct line *)a)->next;
|
|
}
|
|
|
|
static void set_next(void *a, void *b)
|
|
{
|
|
((struct line *)a)->next = b;
|
|
}
|
|
|
|
static int compare_strings(const void *a, const void *b)
|
|
{
|
|
const struct line *x = a, *y = b;
|
|
return strcmp(x->text, y->text);
|
|
}
|
|
|
|
int main(int argc, const char **argv)
|
|
{
|
|
struct line *line, *p = NULL, *lines = NULL;
|
|
struct strbuf sb = STRBUF_INIT;
|
|
|
|
for (;;) {
|
|
if (strbuf_getwholeline(&sb, stdin, '\n'))
|
|
break;
|
|
line = xmalloc(sizeof(struct line));
|
|
line->text = strbuf_detach(&sb, NULL);
|
|
if (p) {
|
|
line->next = p->next;
|
|
p->next = line;
|
|
} else {
|
|
line->next = NULL;
|
|
lines = line;
|
|
}
|
|
p = line;
|
|
}
|
|
|
|
lines = llist_mergesort(lines, get_next, set_next, compare_strings);
|
|
|
|
while (lines) {
|
|
printf("%s", lines->text);
|
|
lines = lines->next;
|
|
}
|
|
return 0;
|
|
}
|