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git/test-mergesort.c
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#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, 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; | |
} |