forked from TrueCloudLab/neoneo-go
126 lines
2.4 KiB
Go
126 lines
2.4 KiB
Go
package compiler
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import (
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"bytes"
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"encoding/hex"
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"fmt"
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"go/ast"
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"go/build"
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"go/parser"
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"go/types"
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"io"
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"io/ioutil"
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"log"
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"os"
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"strings"
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"github.com/CityOfZion/neo-go/pkg/vm"
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"golang.org/x/tools/go/loader"
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)
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const fileExt = "avm"
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// Options contains all the parameters that affect the behaviour of the compiler.
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type Options struct {
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// The extension of the output file default set to .avm
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Ext string
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// The name of the output file.
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Outfile string
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// Debug will output an hex encoded string of the generated bytecode.
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Debug bool
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}
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type buildInfo struct {
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initialPackage string
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program *loader.Program
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}
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// Compile compiles a Go program into bytecode that can run on the NEO virtual machine.
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func Compile(r io.Reader, o *Options) ([]byte, error) {
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conf := loader.Config{ParserMode: parser.ParseComments}
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f, err := conf.ParseFile("", r)
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if err != nil {
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return nil, err
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}
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conf.CreateFromFiles("", f)
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prog, err := conf.Load()
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if err != nil {
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return nil, err
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}
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ctx := &buildInfo{
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initialPackage: f.Name.Name,
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program: prog,
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}
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buf, err := CodeGen(ctx)
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if err != nil {
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return nil, err
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}
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return buf.Bytes(), nil
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}
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type archive struct {
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f *ast.File
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typeInfo *types.Info
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}
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// CompileAndSave will compile and save the file to disk.
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func CompileAndSave(src string, o *Options) error {
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if !strings.HasSuffix(src, ".go") {
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return fmt.Errorf("%s is not a Go file", src)
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}
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o.Outfile = strings.TrimSuffix(o.Outfile, fmt.Sprintf(".%s", fileExt))
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if len(o.Outfile) == 0 {
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o.Outfile = strings.TrimSuffix(src, ".go")
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}
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if len(o.Ext) == 0 {
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o.Ext = fileExt
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}
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b, err := ioutil.ReadFile(src)
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if err != nil {
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return err
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}
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b, err = Compile(bytes.NewReader(b), o)
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if err != nil {
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return fmt.Errorf("error while trying to compile smart contract file: %v", err)
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}
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log.Println(hex.EncodeToString(b))
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out := fmt.Sprintf("%s.%s", o.Outfile, o.Ext)
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return ioutil.WriteFile(out, b, os.ModePerm)
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}
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// CompileAndInspect compiles the program and dumps the opcode in a user friendly format.
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func CompileAndInspect(src string) error {
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b, err := ioutil.ReadFile(src)
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if err != nil {
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return err
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}
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b, err = Compile(bytes.NewReader(b), &Options{})
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if err != nil {
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return err
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}
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v := vm.New(0)
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v.LoadScript(b)
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v.PrintOps()
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return nil
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}
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func gopath() string {
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gopath := os.Getenv("GOPATH")
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if len(gopath) == 0 {
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gopath = build.Default.GOPATH
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}
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return gopath
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}
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func init() {
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log.SetFlags(0)
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}
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