Avoid make_printable_zval in snprintf

Use zval_get_tmp_string() instead.

Author: nikic

main/snprintf.c

@@ -585,8 +585,6 @@ static int format_converter(register buffy * odp, const char *fmt, va_list ap) /
 
 	char *s = NULL;
 	size_t s_len;
-	int free_zcopy;
-	zval *zvp, zcopy;
 
 	int min_width = 0;
 	int precision = 0;
@@ -630,11 +628,11 @@ static int format_converter(register buffy * odp, const char *fmt, va_list ap) /
 			/*
 			 * Default variable settings
 			 */
+			zend_string *tmp_str = NULL;
 			adjust = RIGHT;
 			alternate_form = print_sign = print_blank = NO;
 			pad_char = ' ';
 			prefix_char = NUL;
-			free_zcopy = 0;
 
 			fmt++;
 
@@ -768,13 +766,10 @@ static int format_converter(register buffy * odp, const char *fmt, va_list ap) /
 			 */
 			switch (*fmt) {
 				case 'Z': {
-					zvp = (zval*) va_arg(ap, zval*);
-					free_zcopy = zend_make_printable_zval(zvp, &zcopy);
-					if (free_zcopy) {
-						zvp = &zcopy;
-					}
-					s_len = Z_STRLEN_P(zvp);
-					s = Z_STRVAL_P(zvp);
+					zval *zvp = va_arg(ap, zval*);
+					zend_string *str = zval_get_tmp_string(zvp, &tmp_str);
+					s_len = ZSTR_LEN(str);
+					s = ZSTR_VAL(str);
 					if (adjust_precision && (size_t)precision < s_len) {
 						s_len = precision;
 					}
@@ -1178,9 +1173,7 @@ static int format_converter(register buffy * odp, const char *fmt, va_list ap) /
 
 			if (adjust_width && adjust == LEFT && (size_t)min_width > s_len)
 				PAD(min_width, s_len, pad_char);
-			if (free_zcopy) {
-				zval_ptr_dtor_str(&zcopy);
-			}
+			zend_tmp_string_release(tmp_str);
 		}
 skip_output:
 		fmt++;