wa-lang.org/wazero@v1.0.2/imports/proxywasm/internal/hostcall_utils_tinygo.go (about)

     1  // Copyright 2020-2021 Tetrate
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  // http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  //go:build tinygo
    16  
    17  // Since the difference of the types in SliceHeader.{Len, Cap} between tinygo and go,
    18  // we have to have separated functions for converting bytes
    19  // https://github.com/tinygo-org/tinygo/issues/1284
    20  
    21  package internal
    22  
    23  import (
    24  	"reflect"
    25  	"unsafe"
    26  )
    27  
    28  func RawBytePtrToString(raw *byte, size int) string {
    29  	return *(*string)(unsafe.Pointer(&reflect.SliceHeader{
    30  		Data: uintptr(unsafe.Pointer(raw)),
    31  		Len:  uintptr(size),
    32  		Cap:  uintptr(size),
    33  	}))
    34  }
    35  
    36  func RawBytePtrToByteSlice(raw *byte, size int) []byte {
    37  	return *(*[]byte)(unsafe.Pointer(&reflect.SliceHeader{
    38  		Data: uintptr(unsafe.Pointer(raw)),
    39  		Len:  uintptr(size),
    40  		Cap:  uintptr(size),
    41  	}))
    42  }