ext/pgsql: use smart_str_append_double() instead of snprintf call (#21406)

Author: Girgias

ext/pgsql/pgsql.c

@@ -5617,7 +5617,6 @@ static inline zend_result build_tablename(smart_str *querystr, PGconn *pg_link,
 PHP_PGSQL_API zend_result php_pgsql_insert(PGconn *pg_link, const zend_string *table, zval *var_array, zend_ulong opt, zend_string **sql)
 {
 	zval *val, converted;
-	char buf[256];
 	char *tmp;
 	smart_str querystr = {0};
 	zend_result ret = FAILURE;
@@ -5700,7 +5699,7 @@ PHP_PGSQL_API zend_result php_pgsql_insert(PGconn *pg_link, const zend_string *t
 				smart_str_append_long(&querystr, Z_LVAL_P(val));
 				break;
 			case IS_DOUBLE:
-				smart_str_appendl(&querystr, buf, snprintf(buf, sizeof(buf), "%F", Z_DVAL_P(val)));
+				smart_str_append_double(&querystr, Z_DVAL_P(val), 6, false);
 				break;
 			case IS_NULL:
 				smart_str_appendl(&querystr, "NULL", sizeof("NULL")-1);
@@ -5884,8 +5883,7 @@ static inline int build_assignment_string(PGconn *pg_link, smart_str *querystr,
 				smart_str_append_long(querystr, Z_LVAL_P(val));
 				break;
 			case IS_DOUBLE: {
-				char buf[256];
-				smart_str_appendl(querystr, buf, MIN(snprintf(buf, sizeof(buf), "%F", Z_DVAL_P(val)), sizeof(buf) - 1));
+				smart_str_append_double(querystr, Z_DVAL_P(val), 6, false);
 				}
 				break;
 			case IS_NULL: