175 lines
3.2 KiB
Go
175 lines
3.2 KiB
Go
package pointer
|
|
|
|
import (
|
|
"log"
|
|
|
|
"git.adyxax.org/adyxax/gofunge/pkg/field"
|
|
)
|
|
|
|
func (p *Pointer) Exec(f *field.Field) (done bool, returnValue *int) {
|
|
c := p.Get(*f)
|
|
if p.stringMode {
|
|
if p.lastCharWasSpace {
|
|
for c == ' ' {
|
|
c = p.StepAndGet(*f)
|
|
}
|
|
p.lastCharWasSpace = false
|
|
}
|
|
if c == '"' {
|
|
p.stringMode = false
|
|
p.lastCharWasSpace = false
|
|
} else {
|
|
if c == ' ' {
|
|
p.lastCharWasSpace = true
|
|
}
|
|
p.ss.head.Push(c)
|
|
}
|
|
} else {
|
|
for jumpingMode := false; jumpingMode || c == ' ' || c == ';'; c = p.StepAndGet(*f) {
|
|
if c == ';' {
|
|
jumpingMode = !jumpingMode
|
|
}
|
|
}
|
|
done, returnValue = p.eval(c, f)
|
|
}
|
|
p.Step(*f)
|
|
return
|
|
}
|
|
|
|
func (p *Pointer) eval(c int, f *field.Field) (done bool, returnValue *int) {
|
|
handled := true
|
|
switch c {
|
|
case '@':
|
|
return true, nil
|
|
case '#':
|
|
p.Step(*f)
|
|
case 'j':
|
|
n := p.ss.head.Pop()
|
|
for j := 0; j < n; j++ {
|
|
p.Step(*f)
|
|
}
|
|
case 'q':
|
|
v := p.ss.head.Pop()
|
|
return true, &v
|
|
case 'k':
|
|
n := p.ss.head.Pop()
|
|
c = p.StepAndGet(*f)
|
|
for jumpingMode := false; jumpingMode || c == ' ' || c == ';'; c = p.StepAndGet(*f) {
|
|
if c == ';' {
|
|
jumpingMode = !jumpingMode
|
|
}
|
|
}
|
|
for j := 0; j < n; j++ {
|
|
p.eval(c, f)
|
|
}
|
|
case '!':
|
|
v := p.ss.head.Pop()
|
|
if v == 0 {
|
|
v = 1
|
|
} else {
|
|
v = 0
|
|
}
|
|
p.ss.head.Push(v)
|
|
case '`':
|
|
b, a := p.ss.head.Pop(), p.ss.head.Pop()
|
|
if a > b {
|
|
a = 1
|
|
} else {
|
|
a = 0
|
|
}
|
|
p.ss.head.Push(a)
|
|
case '_':
|
|
v := p.ss.head.Pop()
|
|
if v == 0 {
|
|
p.Redirect('>')
|
|
} else {
|
|
p.Redirect('<')
|
|
}
|
|
case '|':
|
|
v := p.ss.head.Pop()
|
|
if v == 0 {
|
|
p.Redirect('v')
|
|
} else {
|
|
p.Redirect('^')
|
|
}
|
|
case 'w':
|
|
b, a := p.ss.head.Pop(), p.ss.head.Pop()
|
|
if a < b {
|
|
p.Redirect('[')
|
|
} else if a > b {
|
|
p.Redirect(']')
|
|
}
|
|
case '+':
|
|
b, a := p.ss.head.Pop(), p.ss.head.Pop()
|
|
p.ss.head.Push(a + b)
|
|
case '*':
|
|
b, a := p.ss.head.Pop(), p.ss.head.Pop()
|
|
p.ss.head.Push(a * b)
|
|
case '-':
|
|
b, a := p.ss.head.Pop(), p.ss.head.Pop()
|
|
p.ss.head.Push(a - b)
|
|
case '/':
|
|
b, a := p.ss.head.Pop(), p.ss.head.Pop()
|
|
if b == 0 {
|
|
p.ss.head.Push(0)
|
|
return
|
|
}
|
|
p.ss.head.Push(a / b)
|
|
case '%':
|
|
b, a := p.ss.head.Pop(), p.ss.head.Pop()
|
|
if b == 0 {
|
|
p.ss.head.Push(0)
|
|
return
|
|
}
|
|
p.ss.head.Push(a % b)
|
|
case '"':
|
|
p.stringMode = true
|
|
case '\'':
|
|
p.ss.head.Push(p.StepAndGet(*f))
|
|
case 's':
|
|
p.Step(*f)
|
|
f.Set(p.x, p.y, p.ss.head.Pop())
|
|
case '$':
|
|
p.ss.head.Pop()
|
|
case ':':
|
|
p.ss.head.Duplicate()
|
|
case '\\':
|
|
p.ss.head.Swap()
|
|
case 'n':
|
|
p.ss.head.Clear()
|
|
case '{':
|
|
p.ss.Begin(p)
|
|
case '}':
|
|
p.ss.End(p)
|
|
case 'u':
|
|
p.ss.Under()
|
|
case 'g':
|
|
y, x := p.ss.head.Pop(), p.ss.head.Pop()
|
|
p.ss.head.Push(f.Get(x+p.sox, y+p.soy))
|
|
case 'p':
|
|
y, x, v := p.ss.head.Pop(), p.ss.head.Pop(), p.ss.head.Pop()
|
|
f.Set(x+p.sox, y+p.soy, v)
|
|
case '.':
|
|
p.DecimalOutput(p.ss.head.Pop())
|
|
case ',':
|
|
p.CharacterOutput(p.ss.head.Pop())
|
|
case '&':
|
|
p.ss.head.Push(p.DecimalInput())
|
|
case '~':
|
|
p.ss.head.Push(p.CharacterInput())
|
|
default:
|
|
handled = false
|
|
}
|
|
if !handled {
|
|
switch {
|
|
case p.Redirect(c):
|
|
case c >= '0' && c <= '9':
|
|
p.ss.head.Push(c - '0')
|
|
case c >= 'a' && c <= 'f':
|
|
p.ss.head.Push(c - 'a' + 10)
|
|
default:
|
|
log.Fatalf("Non implemented instruction code %d : %c", c, c)
|
|
}
|
|
}
|
|
return
|
|
}
|