Function print_str

kernel/generic/src/printf/printf_core.c:280–317

Print string. * * @param str String to be printed. * @param width Width modifier. * @param precision Precision modifier. * @param flags Flags that modify the way the string is printed. * * @return Number of characters printed, negative value on failure. */

 * @return Number of characters printed, negative value on failure.
 */
static int print_str(char *str, int width, unsigned int precision,
    uint32_t flags, printf_spec_t *ps)
{
	if (str == NULL)
		return printf_putstr(nullstr, ps);

	/* Print leading spaces. */
	size_t strw = str_length(str);
	if ((precision == 0) || (precision > strw))
		precision = strw;

	/* Left padding */
	size_t counter = 0;
	width -= precision;
	if (!(flags & __PRINTF_FLAG_LEFTALIGNED)) {
		while (width-- > 0) {
			if (printf_putchar(' ', ps) == 1)
				counter++;
		}
	}

	/* Part of @a str fitting into the alloted space. */
	int retval;
	size_t size = str_lsize(str, precision);
	if ((retval = printf_putnchars(str, size, ps)) < 0)
		return -counter;

	counter += retval;

	/* Right padding */
	while (width-- > 0) {
		if (printf_putchar(' ', ps) == 1)
			counter++;
	}

	return ((int) counter);

}

/** Print wide string.
 *