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fix(std-io): make uint128 decimal formatting safe (#2924)

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* fix(std-io): make uint128 decimal formatting safe and add all-base
numeric coverage
---------

Co-authored-by: Christoffer Lerno <christoffer@aegik.com>
This commit is contained in:
Fernando López Guevara
2026-02-11 19:50:16 -03:00
committed by GitHub
parent 7665720264
commit f079fa82b2
5 changed files with 243 additions and 34 deletions
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29
test/unit/stdlib/core/formatter.c3
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@@ -8,6 +8,13 @@ fn usz? Foo.to_format(&self, Formatter *f) @dynamic
return f.printf("Foo[%d]", self.a);
}
enum FormatterEnum
{
ABC,
BCD,
EFG,
}
fn void test_ref() @test
{
Foo* f = &&(Foo){ 8 };
@@ -42,3 +49,25 @@ fn void test_ref() @test
defer free(s3);
assert(s3 == "1.235e+04 8.765e-04 1.235e+06 12.35 12.30 1.000 3.141592653589793");
}
fn void test_uint128_decimal_formatting() @test
{
uint128 v = 0xFFEEDDCC_BBAA9988_77665544_33221100;
String s = string::format(mem, "%d", v);
defer free(s);
test::eq(s, "340193404210632335760508365704335069440");
String s2 = string::format(mem, "%d", uint128.max);
defer free(s2);
test::eq(s2, "340282366920938463463374607431768211455");
}
fn void test_mixed_format_with_uint128() @test
{
int a = 1234;
uint128 b = 0xFFEEDDCC_BBAA9988_77665544_33221100;
FormatterEnum e = BCD;
String s = string::format(mem, "a: %s, b: %d, foo: %s", a, b, e);
defer free(s);
test::eq(s, "a: 1234, b: 340193404210632335760508365704335069440, foo: BCD");
}