test-list.c

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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
 
#include "list.h"
#include "utils.h"
 
struct item {
        const char *name;
        struct list_head list;
};
 
#define OUT(fmt, ...) do { \
        fprintf(stdout, "%s: " fmt, __func__, ## __VA_ARGS__); \
} while (0);
 
static void init_list(struct list_head *list)
{
        const char *vals[] = {
                "zero", "one", "two", "three", "four", "five", "six",
                "seven", "eight", "nine", "ten", "eleven", "twelve"
        };
 
        OUT("list_empty: %s\n", list_empty(list) ? "yes" : "no");
        OUT("list_add_tail: ");
        for (size_t i=0; i<ARRAY_SIZE(vals); i++) {
                struct item *e = malloc(sizeof(struct item));
                e->name = vals[i];
                list_add_tail(&e->list, list);
                fprintf(stdout, "%s ", vals[i]);
        }
        fprintf(stdout, "\n");
        OUT("list_empty: %s\n", list_empty(list) ? "yes" : "no");
}
 
static void test_basics()
{
        struct item *tmp;
        struct item *item;
        struct item *last;
        struct item *first;
        struct list_head test_list = LIST_HEAD_INIT(test_list);
 
        init_list(&test_list);
 
        first = list_first_entry(&test_list, struct item, list);
        last = list_last_entry(&test_list, struct item, list);
        OUT("first=%s last=%s\n", first->name, last->name);
        OUT("'zero' is first, %s\n", list_is_first(&first->list, &test_list) ? "yes" : "no");
        OUT("'twelve' is last, %s\n", list_is_last(&last->list, &test_list) ? "yes" : "no");
 
        OUT("removing 'twelve' and 'zero'\n");
        list_del(&first->list);
        list_del(&last->list);
        free(first);
        free(last);
 
        first = list_first_entry(&test_list, struct item, list);
        last = list_last_entry(&test_list, struct item, list);
 
        if (!first || !last)
                return;
 
        OUT("first=%s last=%s\n", first->name, last->name);
        OUT("'one' is first, %s\n", list_is_first(&first->list, &test_list) ? "yes" : "no");
        OUT("'eleven' is last, %s\n", list_is_last(&last->list, &test_list) ? "yes" : "no");
 
        OUT("moving 'one' to the tail\n");
        list_move_tail(&first->list, &test_list);
        first = list_first_entry(&test_list, struct item, list);
        last = list_last_entry(&test_list, struct item, list);
        OUT("first=%s last=%s\n", first->name, last->name);
        OUT("'two' is first, %s\n", list_is_first(&first->list, &test_list) ? "yes" : "no");
        OUT("'one' is last, %s\n", list_is_last(&last->list, &test_list) ? "yes" : "no");
 
        OUT("list_for_each_entry: ");
        list_for_each_entry(item, &test_list, list) {
                fprintf(stdout, "%s ", item->name);
        }
        fprintf(stdout, "\n");
 
        OUT("list_for_each_entry_reverse: ");
        list_for_each_entry_reverse(item, &test_list, list) {
                fprintf(stdout, "%s ", item->name);
        }
        fprintf(stdout, "\n");
 
        OUT("delete all entries\n");
        list_for_each_entry_safe(item, tmp, &test_list, list) {
                list_del(&item->list);
                free(item);
        }
        OUT("list_empty: %s\n", list_empty(&test_list) ? "yes" : "no");
}
 
static void test_while_list_empty()
{
        struct item *first;
        struct list_head test_list = LIST_HEAD_INIT(test_list);
 
        init_list(&test_list);
 
        OUT("delete all entries\n");
        while (!list_empty(&test_list)) {
                first = list_first_entry(&test_list, struct item, list);
                list_del(&first->list);
                free(first);
        }
        OUT("list_empty: %s\n", list_empty(&test_list) ? "yes" : "no");
}
 
int main()
{
        test_basics();
        test_while_list_empty();
        return 0;
}