strconv: reject overflow before arithmetic

2026-08-09 17:50:47 +09:00
parent 8e2e6ae162
commit 976dc8a813
6 changed files with 118 additions and 19 deletions
--- a/lib/strconv/decimal.ww
+++ b/lib/strconv/decimal.ww
@@ -48,8 +48,6 @@

 package strconv;

-import os;
-
 // ref/hare/strconv/decimal.ha:5.
 def maxshift: u8 = 60u8;

@@ -59,7 +57,7 @@ def decimal_point_range: u16 = 2047u16;
 // ref/hare/strconv/decimal.ha:8-26. Field layout 1:1. The 800-digit
 // bound covers subnormal doubles (min exp -1074, max mantissa 4e16
 // → at most 767 digits; 800 leaves headroom).
-export type decimal = struct {
+type decimal = struct {
 	digits: [800]u8,
 	nd: size,
 	dp: i32,