104 lines
1.8 KiB
Go
104 lines
1.8 KiB
Go
//go:build js && wasm
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// +build js,wasm
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package main
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import (
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"bufio"
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"bytes"
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"fmt"
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"io/ioutil"
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"os"
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"runtime"
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"syscall/js"
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"varaq/varaq"
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)
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func main() {
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if runtime.GOARCH == "wasm" {
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done := make(chan struct{}, 0)
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js.Global().Set("varaq", js.FuncOf(jsInterpret))
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fmt.Println("varaq WASM init, Qa'pla!")
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<-done
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} else {
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argsCount := len(os.Args[1:])
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if argsCount >= 1 {
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runFile(os.Args[1])
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} else {
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repl()
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}
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os.Exit(0)
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}
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}
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func repl() {
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scanner := bufio.NewScanner(os.Stdin)
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for fmt.Print("> "); scanner.Scan(); fmt.Print("> ") {
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line := scanner.Text()
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if len(line) == 0 {
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return
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}
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err := interpret(line)
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if err != nil {
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fmt.Printf("%v\n", err)
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}
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}
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}
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func runFile(path string) {
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code, err := ioutil.ReadFile(path) // the file is inside the local directory
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if err != nil {
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fmt.Printf("%v\n", err)
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os.Exit(65)
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}
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err = interpret(string(code))
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if err != nil {
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fmt.Printf("%v\n", err)
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os.Exit(65)
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}
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}
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func interpret(src string) error {
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tokens, err := varaq.Tokenize(src)
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if err != nil {
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return fmt.Errorf("%v", err)
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}
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code := varaq.Parse(tokens)
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err = varaq.Interpret(code, os.Args[1:], os.Stdout)
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if err != nil {
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fmt.Printf("%v\n", err)
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return err
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}
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return nil
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}
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func jsInterpret(this js.Value, args []js.Value) interface{} {
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if len(args) < 1 {
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return js.ValueOf("no input")
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}
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input := args[0].String()
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tokens, err := varaq.Tokenize(input)
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if err != nil {
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return js.ValueOf(fmt.Errorf("%v", err))
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}
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code := varaq.Parse(tokens)
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buf := bytes.NewBufferString("")
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strings := make([]string, len(args[1:]))
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for i, jsVal := range args[1:] {
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strings[i] = jsVal.String()
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}
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err = varaq.Interpret(code, strings, buf)
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if err != nil {
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return js.ValueOf(fmt.Errorf("%v", err))
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}
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return js.ValueOf(buf.String())
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}
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