86 lines
1.4 KiB
Go
86 lines
1.4 KiB
Go
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package avo
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import (
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"fmt"
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"io"
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"strings"
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)
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// dot is the pesky unicode dot used in Go assembly.
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const dot = "\u00b7"
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type Printer interface {
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Print(*File) error
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}
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type GoPrinter struct {
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w io.Writer
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by string // generated by
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copyright []string
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err error
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}
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func NewGoPrinter(w io.Writer) *GoPrinter {
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return &GoPrinter{
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w: w,
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by: "avo",
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}
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}
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func (p *GoPrinter) SetGeneratedBy(by string) {
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p.by = by
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}
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func (p *GoPrinter) Print(f *File) error {
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p.header()
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for _, fn := range f.functions {
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p.function(fn)
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}
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return p.err
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}
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func (p *GoPrinter) header() {
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p.generated()
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p.nl()
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p.incl("textflag.h")
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p.nl()
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}
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func (p *GoPrinter) generated() {
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p.comment(fmt.Sprintf("Code generated by %s. DO NOT EDIT.", p.by))
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}
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func (p *GoPrinter) incl(path string) {
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p.printf("#include \"%s\"\n", path)
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}
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func (p *GoPrinter) comment(line string) {
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p.multicomment([]string{line})
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}
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func (p *GoPrinter) multicomment(lines []string) {
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for _, line := range lines {
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p.printf("// %s\n", line)
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}
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}
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func (p *GoPrinter) function(f *Function) {
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p.printf("TEXT %s%s(SB),0,$%d-%d\n", dot, f.Name(), f.FrameBytes(), f.ArgumentBytes())
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for _, i := range f.inst {
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p.printf("\t%s\t%s\n", i.Mnemonic, strings.Join(i.Operands, ", "))
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}
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}
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func (p *GoPrinter) nl() {
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p.printf("\n")
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}
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func (p *GoPrinter) printf(format string, args ...interface{}) {
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if _, err := fmt.Fprintf(p.w, format, args...); err != nil {
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p.err = err
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}
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}
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