42 lines
687 B
Go
42 lines
687 B
Go
package interpreter
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import (
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"git.adyxax.org/adyxax/gofunge98/pkg/field"
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"git.adyxax.org/adyxax/gofunge98/pkg/pointer"
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)
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type Interpreter struct {
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f *field.Field
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p *pointer.Pointer
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}
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func NewInterpreter(f *field.Field, p *pointer.Pointer) *Interpreter {
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return &Interpreter{f: f, p: p}
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}
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func (i *Interpreter) Run() int {
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for i.p != nil {
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if v := i.step(); v != nil {
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return *v
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}
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}
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return 0
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}
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func (i *Interpreter) step() *int {
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var prev *pointer.Pointer = nil
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for p := i.p; p != nil; p = p.Next {
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done, v := p.Exec(i.f)
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if v != nil {
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return v
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}
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if done {
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if prev == nil {
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i.p = p.Next
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} else {
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prev.Next = p.Next
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}
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}
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}
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return nil
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}
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