sointu/vm/generate/generate.go

//go:build ignore
// +build ignore

package main

import (
	"fmt"
	"os"
	"strings"

	"github.com/vsariola/sointu/vm"
)

func check(e error) {
	if e != nil {
		panic(e)
	}
}

func main() {
	outputFile, err := os.Create("opcodes.go")
	check(err)
	defer outputFile.Close()
	fmt.Fprintln(outputFile, "package vm")
	fmt.Fprintln(outputFile, "")
	fmt.Fprintln(outputFile, "// Code generated by go generate; DO NOT EDIT.")
	fmt.Fprintln(outputFile, "const (")
	features := vm.AllFeatures{}
	max := 0
	for _, instr := range features.Instructions() {
		if l := len(instr); max < l {
			max = l
		}
	}
	for i, instr := range features.Instructions() {
		format := fmt.Sprintf("\top%%-%vv = %%v\n", max)
		fmt.Fprintf(outputFile, format, strings.Title(instr), i+1)
	}
	fmt.Fprintln(outputFile, ")")
	fmt.Fprintln(outputFile, "")
	fmt.Fprintf(outputFile, "var transformCounts = [...]int{")
	for i, instr := range features.Instructions() {
		if i > 0 {
			fmt.Fprintf(outputFile, ", ")
		}
		fmt.Fprintf(outputFile, "%v", features.TransformCount(instr))
	}
	fmt.Fprintln(outputFile, "}")
}