#include "cache.h"
#include "argv-array.h"
#include "strbuf.h"

const char *empty_argv[] = { NULL };

void argv_array_init(struct argv_array *array)
{
        array->argv = empty_argv;
        array->argc = 0;
        array->alloc = 0;
}

static void argv_array_push_nodup(struct argv_array *array, const char *value)
{
        if (array->argv == empty_argv)
                array->argv = NULL;

        ALLOC_GROW(array->argv, array->argc + 2, array->alloc);
        array->argv[array->argc++] = value;
        array->argv[array->argc] = NULL;
}

void argv_array_push(struct argv_array *array, const char *value)
{
        argv_array_push_nodup(array, xstrdup(value));
}

void argv_array_pushf(struct argv_array *array, const char *fmt, ...)
{
        va_list ap;
        struct strbuf v = STRBUF_INIT;

        va_start(ap, fmt);
        strbuf_vaddf(&v, fmt, ap);
        va_end(ap);

        argv_array_push_nodup(array, strbuf_detach(&v, NULL));
}

void argv_array_pushl(struct argv_array *array, ...)
{
        va_list ap;
        const char *arg;

        va_start(ap, array);
        while((arg = va_arg(ap, const char *)))
                argv_array_push(array, arg);
        va_end(ap);
}

void argv_array_pop(struct argv_array *array)
{
        if (!array->argc)
                return;
        free((char *)array->argv[array->argc - 1]);
        array->argv[array->argc - 1] = NULL;
        array->argc--;
}

void argv_array_clear(struct argv_array *array)
{
        if (array->argv != empty_argv) {
                int i;
                for (i = 0; i < array->argc; i++)
                        free((char *)array->argv[i]);
                free(array->argv);
        }
        argv_array_init(array);
}