Archipelago » qemu

static void v9fs_string_init(V9fsString *str)

{

    str->data = NULL;

    str->size = 0;

}

static void v9fs_string_free(V9fsString *str)

{

    qemu_free(str->data);

    str->data = NULL;

    str->size = 0;

}

static void v9fs_string_null(V9fsString *str)

{

    v9fs_string_free(str);

}

static int number_to_string(void *arg, char type)

{

    unsigned int ret = 0;

    switch (type) {

    case 'u': {

        unsigned int num = *(unsigned int *)arg;

        do {

            ret++;

            num = num/10;

        } while (num);

        break;

    }

    default:

        printf("Number_to_string: Unknown number format\n");

        return -1;

    }

    return ret;

}

static int v9fs_string_alloc_printf(char **strp, const char *fmt, va_list ap)

{

    va_list ap2;

    char *iter = (char *)fmt;

    int len = 0;

    int nr_args = 0;

    char *arg_char_ptr;

    unsigned int arg_uint;

    /* Find the number of %'s that denotes an argument */

    for (iter = strstr(iter, "%"); iter; iter = strstr(iter, "%")) {

        nr_args++;

        iter++;

    }

    len = strlen(fmt) - 2*nr_args;

    if (!nr_args) {

        goto alloc_print;

    }

    va_copy(ap2, ap);

    iter = (char *)fmt;

    /* Now parse the format string */

    for (iter = strstr(iter, "%"); iter; iter = strstr(iter, "%")) {

        iter++;

        switch (*iter) {

        case 'u':

            arg_uint = va_arg(ap2, unsigned int);

            len += number_to_string((void *)&arg_uint, 'u');

            break;

        case 's':

            arg_char_ptr = va_arg(ap2, char *);

            len += strlen(arg_char_ptr);

            break;

        case 'c':

            len += 1;

            break;

        default:

            fprintf(stderr,

		    "v9fs_string_alloc_printf:Incorrect format %c", *iter);

            return -1;

        }

        iter++;

    }

alloc_print:

    *strp = qemu_malloc((len + 1) * sizeof(**strp));

    return vsprintf(*strp, fmt, ap);

}

static void v9fs_string_sprintf(V9fsString *str, const char *fmt, ...)

{

    va_list ap;

    int err;

    v9fs_string_free(str);

    va_start(ap, fmt);

    err = v9fs_string_alloc_printf(&str->data, fmt, ap);

    BUG_ON(err == -1);

    va_end(ap);

    str->size = err;

}

static void v9fs_string_copy(V9fsString *lhs, V9fsString *rhs)

{

    v9fs_string_free(lhs);

    v9fs_string_sprintf(lhs, "%s", rhs->data);

}

static size_t v9fs_string_size(V9fsString *str)

{

    return str->size;

}

    (void) v9fs_string_init;

    (void) v9fs_string_free;

    (void) v9fs_string_null;

    (void) v9fs_string_sprintf;

    (void) v9fs_string_copy;

    (void) v9fs_string_size;