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api: adds Encode and Decode functions for int32 and uint32 (#871)

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Signed-off-by: Takeshi Yoneda <takeshi@tetrate.io>
This commit is contained in:
Takeshi Yoneda
2022-11-30 14:29:00 +09:00
committed by GitHub
parent 721327decc
commit 0a52a732f0
2 changed files with 81 additions and 10 deletions
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54
api/wasm_test.go
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@@ -111,7 +111,7 @@ func TestEncodeDecodeF64(t *testing.T) {
}
}
func TestEncodeCastI32(t *testing.T) {
func TestEncodeI32(t *testing.T) {
for _, v := range []int32{
0, 100, -100, 1, -1,
math.MaxInt32,
@@ -126,7 +126,57 @@ func TestEncodeCastI32(t *testing.T) {
}
}
func TestEncodeCastI64(t *testing.T) {
func TestDecodeI32(t *testing.T) {
mini32 := math.MinInt32
for _, tc := range []struct {
in uint64
exp int32
}{
{in: 0, exp: 0},
{in: 1 << 60, exp: 0},
{in: 1 << 30, exp: 1 << 30},
{in: 1<<30 | 1<<60, exp: 1 << 30},
{in: uint64(uint32(mini32)) | 1<<59, exp: math.MinInt32},
{in: uint64(uint32(math.MaxInt32)) | 1<<50, exp: math.MaxInt32},
} {
decoded := DecodeI32(tc.in)
require.Equal(t, tc.exp, decoded)
}
}
func TestEncodeU32(t *testing.T) {
for _, v := range []uint32{
0, 100, 1, 1 << 31,
math.MaxInt32,
math.MaxUint32,
} {
t.Run(fmt.Sprintf("%d", v), func(t *testing.T) {
encoded := EncodeU32(v)
require.Zero(t, encoded>>32) // Ensures high bits aren't set
require.Equal(t, v, uint32(encoded))
})
}
}
func TestDecodeU32(t *testing.T) {
mini32 := math.MinInt32
for _, tc := range []struct {
in uint64
exp uint32
}{
{in: 0, exp: 0},
{in: 1 << 60, exp: 0},
{in: 1 << 30, exp: 1 << 30},
{in: 1<<30 | 1<<60, exp: 1 << 30},
{in: uint64(uint32(mini32)) | 1<<59, exp: uint32(mini32)},
{in: uint64(uint32(math.MaxInt32)) | 1<<50, exp: math.MaxInt32},
} {
decoded := DecodeU32(tc.in)
require.Equal(t, tc.exp, decoded)
}
}
func TestEncodeI64(t *testing.T) {
for _, v := range []int64{
0, 100, -100, 1, -1,
math.MaxInt64,