Add asm parser
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118
go/asm/asm.go
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118
go/asm/asm.go
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@ -0,0 +1,118 @@
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package asm
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import (
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"fmt"
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"io"
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"strings"
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"github.com/alecthomas/participle/v2"
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"github.com/alecthomas/participle/v2/lexer"
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)
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type Asm struct {
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Instructions []*Instruction `@@*`
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}
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type Display struct {
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Sym string `@Sym Whitespace`
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Val string `@Quote @Sym @Quote Whitespace`
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}
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func(d Display) String() string {
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return fmt.Sprintf("Display: %v %v", d.Sym, d.Val)
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}
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type Sig struct {
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Sym string `@Sym Whitespace`
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Size uint32 `@Size Whitespace`
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Val uint32 `@Size Whitespace`
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}
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func(s Sig) String() string {
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return fmt.Sprintf("Sig: %v %v %v", s.Sym, s.Size, s.Val)
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}
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type Single struct {
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One string `@Sym Whitespace`
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}
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func(s Single) String() string {
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return fmt.Sprintf("Single: %v", s.One)
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}
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type Double struct {
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One string `@Sym Whitespace`
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Two string `@Sym Whitespace`
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}
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func(d Double) String() string {
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return fmt.Sprintf("Double: %v %v", d.One, d.Two)
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}
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type Sized struct {
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Sym string `@Sym Whitespace`
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Size uint32 `@Size Whitespace`
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X uint32 `(@Size Whitespace)?`
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}
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func(s Sized) String() string {
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return fmt.Sprintf("Sized: %v %v", s.Sym, s.Size)
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}
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type Arg struct {
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ArgNone string "Whitespace?"
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ArgDisplay *Display `@@?`
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ArgSized *Sized `@@?`
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ArgSingle *Single `@@?`
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ArgDouble *Double `@@?`
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}
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func (a Arg) String() string {
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if a.ArgDisplay != nil {
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return fmt.Sprintf("%s", a.ArgDisplay)
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}
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if a.ArgSized != nil {
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return fmt.Sprintf("%s", a.ArgSized)
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}
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if a.ArgSingle != nil {
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return fmt.Sprintf("%s", a.ArgSingle)
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}
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if a.ArgDouble != nil {
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return fmt.Sprintf("%s", a.ArgDouble)
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}
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return ""
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}
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type Instruction struct {
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OpCode string `@Ident`
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OpArg Arg `@@`
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Comment string `Comment?`
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}
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func (i Instruction) String() string {
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return fmt.Sprintf("%s %s", i.OpCode, i.OpArg)
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}
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var (
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asmLexer = lexer.MustSimple([]lexer.SimpleRule{
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{"Comment", `(?:#)[^\n]*\n?`},
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{"Ident", `^[A-Z]+`},
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{"Sym", `[a-zA-Z]+`},
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{"Size", `[0-9]+`},
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{"Whitespace", `[ \t\n\r]+`},
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{"Quote", `["']`},
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})
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asmParser = participle.MustBuild[Asm](
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participle.Lexer(asmLexer),
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participle.Elide("Comment", "Whitespace"),
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)
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)
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func Parse(s string, w io.Writer) (int, error) {
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rd := strings.NewReader(s)
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ast, err := asmParser.Parse("file", rd)
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for i, v := range ast.Instructions {
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fmt.Printf("%v %v\n", i, v)
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}
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return 0, err
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}
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26
go/asm/asm_test.go
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26
go/asm/asm_test.go
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@ -0,0 +1,26 @@
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package asm
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import (
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"log"
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"testing"
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"git.defalsify.org/festive/vm"
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)
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func TestParserInit(t *testing.T) {
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var b []byte
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b = vm.NewLine(b, vm.HALT, nil, nil, nil)
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b = vm.NewLine(b, vm.CATCH, []string{"xyzzy"}, []byte{0x02, 0x9a}, []uint8{1})
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b = vm.NewLine(b, vm.LOAD, []string{"foo"}, []byte{42}, nil)
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b = vm.NewLine(b, vm.MOUT, []string{"bar", "barbarbaz"}, nil, nil)
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s, err := vm.ToString(b)
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log.Printf("parsing:\n%s\n", s)
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n, err := Parse(s, nil)
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if err != nil {
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t.Fatal(err)
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}
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if n != 0 {
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t.Fatalf("expected 0 byte write count, got %v", n)
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}
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}
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@ -1,7 +1,9 @@
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package vm
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package asm
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import (
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"fmt"
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"git.defalsify.org/festive/vm"
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)
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type BatchCode uint16
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@ -61,19 +63,21 @@ func (mp *MenuProcessor) ToLines() []byte {
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postLines := []byte{}
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for _, v := range mp.items {
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preLines = NewLine(preLines, MOUT, []string{v.choice, v.display}, nil, nil)
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preLines = vm.NewLine(preLines, vm.MOUT, []string{v.choice, v.display}, nil, nil)
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switch v.code {
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case MENU_UP:
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postLines = NewLine(postLines, INCMP, []string{v.choice, "_"}, nil, nil)
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postLines = vm.NewLine(postLines, vm.INCMP, []string{v.choice, "_"}, nil, nil)
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case MENU_NEXT:
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_ = postLines
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case MENU_PREVIOUS:
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_ = postLines
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default:
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postLines = NewLine(postLines, INCMP, []string{v.choice, v.target}, nil, nil)
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postLines = vm.NewLine(postLines, vm.INCMP, []string{v.choice, v.target}, nil, nil)
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}
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}
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preLines = NewLine(preLines, HALT, nil, nil, nil)
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preLines = vm.NewLine(preLines, vm.HALT, nil, nil, nil)
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return append(preLines, postLines...)
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}
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@ -1,7 +1,9 @@
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package vm
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package asm
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import (
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"testing"
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"git.defalsify.org/festive/vm"
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)
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@ -28,7 +30,7 @@ func TestMenuInterpreter(t *testing.T) {
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t.Errorf("expected error on invalid menu item 'BOGUS'")
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}
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b := m.ToLines()
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r, err := ToString(b)
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r, err := vm.ToString(b)
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if err != nil {
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t.Fatal(err)
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}
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@ -2,4 +2,7 @@ module git.defalsify.org/festive
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go 1.20
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require github.com/peteole/testdata-loader v0.3.0
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require (
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github.com/alecthomas/participle/v2 v2.0.0
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github.com/peteole/testdata-loader v0.3.0
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)
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@ -52,7 +52,8 @@ func ParseAll(b []byte, w io.Writer) (int, error) {
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vv = 1
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}
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if w != nil {
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rs = fmt.Sprintf("%s %s %v %v # invertmatch=%v\n", s, r, n, vv, m)
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//rs = fmt.Sprintf("%s %s %v %v # invertmatch=%v\n", s, r, n, vv, m)
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rs = fmt.Sprintf("%s %s %v %v\n", s, r, n, vv)
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}
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}
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}
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@ -65,7 +66,8 @@ func ParseAll(b []byte, w io.Writer) (int, error) {
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if m {
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vv = 1
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}
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rs = fmt.Sprintf("%s %v %v # invertmatch=%v\n", s, n, vv, m)
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//rs = fmt.Sprintf("%s %v %v # invertmatch=%v\n", s, n, vv, m)
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rs = fmt.Sprintf("%s %v %v\n", s, n, vv)
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}
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}
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case LOAD:
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@ -153,7 +155,7 @@ func ParseAll(b []byte, w io.Writer) (int, error) {
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return rn, err
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}
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rn += n
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log.Printf("wrote %v bytes from instruction %v", n, s)
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log.Printf("wrote %v bytes for instruction %v", n, s)
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}
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//rs += "\n"
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