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Add Emscripten globals for Infinity and NaN to fix printf for these values

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This commit is contained in:
Brandon Fish 2018-12-16 13:50:54 -06:00
parent ae210253b6
commit de85ab943a
4 changed files with 35 additions and 13 deletions
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26
emtests/printf.c
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@ -27,19 +27,19 @@ int main() {
printf("Width trick: %*d\n", 5, 10);
printf("%s %%\n", "A string");
printf("Null string: %7s\n", NULL);
// printf("Null pointer: %p\n", NULL);
// printf("%lf\n", INFINITY);
// printf("%lF\n", INFINITY);
// printf("%lf\n", -INFINITY);
// printf("%lF\n", -INFINITY);
// printf("%lf\n", NAN);
// printf("%lF\n", NAN);
// printf("%10f\n", NAN);
// printf("%-10f\n", NAN);
// printf("%010.2f\n", NAN);
// printf("%-010.2f\n", NAN);
// printf("%10.f\n", INFINITY);
// printf("%-10.f\n", -INFINITY);
// printf("Null pointer: %p\n", NULL);
printf("%lf\n", INFINITY);
printf("%lF\n", INFINITY);
printf("%lf\n", -INFINITY);
printf("%lF\n", -INFINITY);
printf("%lf\n", NAN);
printf("%lF\n", NAN);
printf("%10f\n", NAN);
printf("%-10f\n", NAN);
printf("%010.2f\n", NAN);
printf("%-010.2f\n", NAN);
printf("%10.f\n", INFINITY);
printf("%-10.f\n", -INFINITY);
// printf("--rest--\n");
// printf("in%%3.5valid\n", 0);
// printf("%.f\n", 0.0f);

12
emtests/printf.output
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@ -15,3 +15,15 @@ Force sign or space: 3.14 -3.14 3.14 -3.14
Width trick: 10
A string %
Null string: (null)
inf
INF
-inf
-INF
nan
NAN
nan
nan
nan
nan
inf
-inf

BIN
emtests/printf.wasm
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Binary file not shown.

10
src/apis/emscripten/mod.rs
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@ -91,6 +91,16 @@ pub fn generate_emscripten_env<'a, 'b>() -> ImportObject<&'a str, &'b str> {
"DYNAMICTOP_PTR",
ImportValue::Global(dynamictop_ptr(STATIC_BUMP) as _),
);
import_object.set(
"global",
"Infinity",
ImportValue::Global(std::f64::INFINITY.to_bits() as _),
);
import_object.set(
"global",
"NaN",
ImportValue::Global(std::f64::NAN.to_bits() as _),
);
import_object.set("env", "tableBase", ImportValue::Global(0));
// Print functions
import_object.set("env", "printf", ImportValue::Func(io::printf as _));