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package main
import (
"context"
"fmt"
"log"
"os"
"github.com/tetratelabs/wazero"
"github.com/tetratelabs/wazero/imports/wasi_snapshot_preview1"
)
const wasmLocation = "../hello.wasm"
func main() {
var ctx = context.Background()
var runtime = wazero.NewRuntime(ctx)
defer runtime.Close(ctx)
var _, hostErr = runtime.NewHostModuleBuilder("env").
NewFunctionBuilder().
WithFunc(xdx).
Export("xdx").
Instantiate(ctx);
if hostErr != nil {
panic(fmt.Sprintf("Failed to create host module: %s", hostErr.Error()))
}
wasi_snapshot_preview1.MustInstantiate(ctx, runtime)
var wasm, wasmErr = LoadWasm()
if wasmErr != nil {
panic(fmt.Sprintf("Failed to load WASM module: %s", wasmErr.Error()))
}
var mod, modErr = runtime.Instantiate(ctx, wasm)
if modErr != nil {
panic(fmt.Sprintf("Failed to instantiate WASM module: %s", modErr.Error()))
}
var add = mod.ExportedFunction("Add")
var result, callErr = add.Call(ctx, 9, 10)
if callErr != nil {
panic(fmt.Sprintf("Failed to call WASM finction: %s", callErr.Error()))
}
fmt.Printf("Addition result: %v\n", result[0])
}
func LoadWasm() ([]byte, error) {
return os.ReadFile(wasmLocation)
}
func xdx() {
log.Printf("xdx (called from WASM)")
}
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