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package pointer
import (
"fmt"
"os"
"testing"
"git.adyxax.org/adyxax/gofunge98/pkg/field"
"github.com/stretchr/testify/require"
)
func TestMycology(t *testing.T) {
file, err := os.Open("../../mycology/mycology.b98")
if err != nil {
t.Skip("mycology test suite not found, skipping")
}
f, err := field.Load(file)
require.NoError(t, err)
p := NewPointer()
p.Argv = []string{"../../mycology/mycology.b98"}
output := ""
// TODO test expected output
p.CharacterOutput = func(c int) {
output += fmt.Sprintf("%c", c)
}
i := NewInterpreter(f, p)
v := i.Run()
require.Equal(t, 15, v)
}
type Interpreter struct {
f *field.Field
p *Pointer
}
func NewInterpreter(f *field.Field, p *Pointer) *Interpreter {
return &Interpreter{f: f, p: p}
}
func (i *Interpreter) Run() int {
for i.p != nil {
if v := i.step(); v != nil {
return *v
}
}
return 0
}
func (i *Interpreter) step() *int {
var prev *Pointer = nil
for p := i.p; p != nil; p = p.Next {
done, v := p.Exec(i.f)
if v != nil {
return v
}
if done {
if prev == nil {
i.p = p.Next
} else {
prev.Next = p.Next
}
}
}
return nil
}
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