root/test-string-list.c

DEFINITIONS

1. parse_string_list
2. write_list
3. write_list_compact
4. prefix_cb
5. main

#include "cache.h"
#include "string-list.h"

/*
 * Parse an argument into a string list.  arg should either be a
 * ':'-separated list of strings, or "-" to indicate an empty string
 * list (as opposed to "", which indicates a string list containing a
 * single empty string).  list->strdup_strings must be set.
 */
static void parse_string_list(struct string_list *list, const char *arg)
{
        if (!strcmp(arg, "-"))
                return;

        (void)string_list_split(list, arg, ':', -1);
}

static void write_list(const struct string_list *list)
{
        int i;
        for (i = 0; i < list->nr; i++)
                printf("[%d]: \"%s\"\n", i, list->items[i].string);
}

static void write_list_compact(const struct string_list *list)
{
        int i;
        if (!list->nr)
                printf("-\n");
        else {
                printf("%s", list->items[0].string);
                for (i = 1; i < list->nr; i++)
                        printf(":%s", list->items[i].string);
                printf("\n");
        }
}

static int prefix_cb(struct string_list_item *item, void *cb_data)
{
        const char *prefix = (const char *)cb_data;
        return starts_with(item->string, prefix);
}

int main(int argc, char **argv)
{
        if (argc == 5 && !strcmp(argv[1], "split")) {
                struct string_list list = STRING_LIST_INIT_DUP;
                int i;
                const char *s = argv[2];
                int delim = *argv[3];
                int maxsplit = atoi(argv[4]);

                i = string_list_split(&list, s, delim, maxsplit);
                printf("%d\n", i);
                write_list(&list);
                string_list_clear(&list, 0);
                return 0;
        }

        if (argc == 5 && !strcmp(argv[1], "split_in_place")) {
                struct string_list list = STRING_LIST_INIT_NODUP;
                int i;
                char *s = xstrdup(argv[2]);
                int delim = *argv[3];
                int maxsplit = atoi(argv[4]);

                i = string_list_split_in_place(&list, s, delim, maxsplit);
                printf("%d\n", i);
                write_list(&list);
                string_list_clear(&list, 0);
                free(s);
                return 0;
        }

        if (argc == 4 && !strcmp(argv[1], "filter")) {
                /*
                 * Retain only the items that have the specified prefix.
                 * Arguments: list|- prefix
                 */
                struct string_list list = STRING_LIST_INIT_DUP;
                const char *prefix = argv[3];

                parse_string_list(&list, argv[2]);
                filter_string_list(&list, 0, prefix_cb, (void *)prefix);
                write_list_compact(&list);
                string_list_clear(&list, 0);
                return 0;
        }

        if (argc == 3 && !strcmp(argv[1], "remove_duplicates")) {
                struct string_list list = STRING_LIST_INIT_DUP;

                parse_string_list(&list, argv[2]);
                string_list_remove_duplicates(&list, 0);
                write_list_compact(&list);
                string_list_clear(&list, 0);
                return 0;
        }

        fprintf(stderr, "%s: unknown function name: %s\n", argv[0],
                argv[1] ? argv[1] : "(there was none)");
        return 1;
}