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abi_c.go
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abi_c.go
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// Copyright 2023 CUE Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package wasm
import (
"cuelang.org/go/internal/pkg"
"github.com/tetratelabs/wazero/api"
)
func decodeRet(r uint64, t typ) any {
switch t {
case _bool:
u := api.DecodeU32(r)
if u == 1 {
return true
}
return false
case _int8, _int16, _int32:
return api.DecodeI32(r)
case _uint8, _uint16, _uint32:
return api.DecodeU32(r)
case _int64, _uint64:
return r
case _float32:
return api.DecodeF32(r)
case _float64:
return api.DecodeF64(r)
}
panic("unsupported return type")
}
// loadArg load the i'th argument (which must be of type t)
// passed to a function call represented by the call context.
// It returns the argument as an uint64, so it can be passed
// directly to Wasm functions.
func loadArg(c *pkg.CallCtxt, i int, t typ) uint64 {
switch t {
case _bool:
b := c.Bool(i)
if b {
return api.EncodeU32(1)
}
return api.EncodeU32(0)
case _int8:
return api.EncodeI32(int32(c.Int8(i)))
case _int16:
return api.EncodeI32(int32(c.Int16(i)))
case _int32:
return api.EncodeI32(c.Int32(i))
case _int64:
return api.EncodeI64(c.Int64(i))
case _uint8:
return api.EncodeU32(uint32(c.Uint8(i)))
case _uint16:
return api.EncodeU32(uint32(c.Uint16(i)))
case _uint32:
return api.EncodeU32(c.Uint32(i))
case _uint64:
return c.Uint64(i)
case _float32:
return api.EncodeF32(float32(c.Float64(i)))
case _float64:
return api.EncodeF64(c.Float64(i))
}
panic("unsupported argument type")
}