draw2d/postscript/operators_array.go

94 lines
3 KiB
Go
Raw Normal View History

2011-04-26 09:56:04 +00:00
// Copyright 2010 The postscript-go Authors. All rights reserved.
// created: 13/12/2010 by Laurent Le Goff
package postscript
import ()
//int array array -> Create array of length int
func array(interpreter *Interpreter) {
interpreter.Push(make([]Value, interpreter.PopInt()))
}
//array length int -> Return number of elements in array
func lengtharray(interpreter *Interpreter) {
interpreter.Push(float64(len(interpreter.Pop().([]Value))))
}
//array index get any -> Return array element indexed by index
func getarray(interpreter *Interpreter) {
index := interpreter.PopInt()
array := interpreter.Pop().([]Value)
interpreter.Push(array[index])
}
//array index any put -> Put any into array at index
func putarray(interpreter *Interpreter) {
value := interpreter.Pop()
index := interpreter.PopInt()
array := interpreter.Pop().([]Value)
array[index] = value
}
//array index count getinterval subarray -> Return subarray of array starting at index for count elements
func getinterval(interpreter *Interpreter) {
count := interpreter.PopInt()
index := interpreter.PopInt()
array := interpreter.Pop().([]Value)
subarray := make([]Value, count)
copy(subarray, array[index:index+count])
interpreter.Push(subarray)
}
//array1 index array2 putinterval Replace subarray of array1 starting at index by array2|packedarray2
func putinterval(interpreter *Interpreter) {
array2 := interpreter.Pop().([]Value)
index := interpreter.PopInt()
array1 := interpreter.Pop().([]Value)
for i, v := range array2 {
array1[i+index] = v
}
}
// any0 … anyn1 array astore array
// stores the objects any0 to anyn1 from the operand stack into array, where n is the length of array
func astore(interpreter *Interpreter) {
array := interpreter.Pop().([]Value)
n := len(array)
for i := 0; i < n; i++ {
array[i] = interpreter.Pop()
}
}
//array aload any0 … any-1 array
//Push all elements of array on stack
func aload(interpreter *Interpreter) {
array := interpreter.Pop().([]Value)
for _, v := range array {
interpreter.Push(v)
}
interpreter.Push(array)
}
//array proc forall Execute proc for each element of array
func forallarray(interpreter *Interpreter) {
proc := NewProcedure(interpreter.PopProcedureDefinition())
array := interpreter.Pop().([]Value)
for _, v := range array {
interpreter.Push(v)
proc.Execute(interpreter)
}
}
var packing bool = false
func currentpacking(interpreter *Interpreter) {
interpreter.Push(packing)
}
func setpacking(interpreter *Interpreter) {
packing = interpreter.PopBoolean()
}
func initArrayOperators(interpreter *Interpreter) {
interpreter.SystemDefine("array", NewOperator(array))
interpreter.SystemDefine("getinterval", NewOperator(getinterval))
interpreter.SystemDefine("putinterval", NewOperator(putinterval))
interpreter.SystemDefine("astore", NewOperator(astore))
interpreter.SystemDefine("aload", NewOperator(aload))
interpreter.SystemDefine("currentpacking", NewOperator(currentpacking))
interpreter.SystemDefine("setpacking", NewOperator(setpacking))
}