draw2d/postscript/operators_dictionary.go

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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 (
"log"
)
//int dict dict -> Create dictionary with capacity for int elements
func dict(interpreter *Interpreter) {
interpreter.Push(NewDictionary(interpreter.PopInt()))
}
//dict length int -> Return number of entries in dict
func lengthdict(interpreter *Interpreter) {
dictionary := interpreter.Pop().(Dictionary)
interpreter.Push(float64(len(dictionary)))
}
//dict maxlength int -> Return current capacity of dict
func maxlength(interpreter *Interpreter) {
interpreter.Pop()
interpreter.Push(float64(999999999)) // push arbitrary value
}
//dict begin -> Push dict on dictionary stack
func begin(interpreter *Interpreter) {
interpreter.PushDictionary(interpreter.Pop().(Dictionary))
}
// end -> Pop current dictionary off dictionary stack
func end(interpreter *Interpreter) {
interpreter.PopDictionary()
}
//key value def -> Associate key and value in current dictionary
func def(interpreter *Interpreter) {
value := interpreter.Pop()
name := interpreter.PopName()
if p, ok := value.(*ProcedureDefinition); ok {
value = NewProcedure(p)
}
interpreter.Define(name, value)
}
//key load value -> Search dictionary stack for key and return associated value
func load(interpreter *Interpreter) {
name := interpreter.PopName()
value, _ := interpreter.FindValueInDictionaries(name)
if value == nil {
log.Printf("Can't find value %s\n", name)
}
interpreter.Push(value)
}
//key value store -> Replace topmost definition of key
func store(interpreter *Interpreter) {
value := interpreter.Pop()
key := interpreter.PopName()
_, dictionary := interpreter.FindValueInDictionaries(key)
if dictionary != nil {
dictionary[key] = value
}
}
//dict key get any -> Return value associated with key in dict
func getdict(interpreter *Interpreter) {
key := interpreter.PopName()
dictionary := interpreter.Pop().(Dictionary)
interpreter.Push(dictionary[key])
}
//dict key value put -> Associate key with value in dict
func putdict(interpreter *Interpreter) {
value := interpreter.Pop()
key := interpreter.PopName()
dictionary := interpreter.Pop().(Dictionary)
dictionary[key] = value
}
//dict key undef Remove key and its value from dict
func undef(interpreter *Interpreter) {
key := interpreter.PopName()
dictionary := interpreter.Pop().(Dictionary)
dictionary[key] = nil
}
//dict key known bool -> Test whether key is in dict
func known(interpreter *Interpreter) {
key := interpreter.PopName()
dictionary := interpreter.Pop().(Dictionary)
interpreter.Push(dictionary[key] != nil)
}
//key where (dict true) or false -> Find dictionary in which key is defined
func where(interpreter *Interpreter) {
key := interpreter.PopName()
_, dictionary := interpreter.FindValueInDictionaries(key)
if dictionary == nil {
interpreter.Push(false)
} else {
interpreter.Push(dictionary)
interpreter.Push(true)
}
}
// dict1 dict2 copy dict2 -> Copy contents of dict1 to dict2
func copydict(interpreter *Interpreter) {
dict2 := interpreter.Pop().(Dictionary)
dict1 := interpreter.Pop().(Dictionary)
for key, value := range dict1 {
dict2[key] = value
}
interpreter.Push(dict2)
}
//dict proc forall -> Execute proc for each entry in dict
func foralldict(interpreter *Interpreter) {
proc := NewProcedure(interpreter.PopProcedureDefinition())
dict := interpreter.Pop().(Dictionary)
for key, value := range dict {
interpreter.Push(key)
interpreter.Push(value)
proc.Execute(interpreter)
}
}
// currentdict dict -> Return current dictionary
func currentdict(interpreter *Interpreter) {
interpreter.Push(interpreter.PeekDictionary())
}
// systemdict dict -> Return system dictionary
func systemdict(interpreter *Interpreter) {
interpreter.Push(interpreter.SystemDictionary())
}
// userdict dict -> Return writeable dictionary in local VM
func userdict(interpreter *Interpreter) {
interpreter.Push(interpreter.UserDictionary())
}
// globaldict dict -> Return writeable dictionary in global VM
func globaldict(interpreter *Interpreter) {
interpreter.Push(interpreter.UserDictionary())
}
// statusdict dict -> Return product-dependent dictionary
func statusdict(interpreter *Interpreter) {
interpreter.Push(interpreter.UserDictionary())
}
// countdictstack int -> Count elements on dictionary stack
func countdictstack(interpreter *Interpreter) {
interpreter.Push(float64(interpreter.DictionaryStackSize()))
}
//array dictstack subarray -> Copy dictionary stack into array
func dictstack(interpreter *Interpreter) {
panic("No yet implemenented")
}
// cleardictstack -> Pop all nonpermanent dictionaries off dictionary stack
func cleardictstack(interpreter *Interpreter) {
interpreter.ClearDictionaries()
}
func initDictionaryOperators(interpreter *Interpreter) {
interpreter.SystemDefine("dict", NewOperator(dict))
//interpreter.SystemDefine("length", NewOperator(length)) // already define in operators_conflict.go
interpreter.SystemDefine("maxlength", NewOperator(maxlength))
interpreter.SystemDefine("begin", NewOperator(begin))
interpreter.SystemDefine("end", NewOperator(end))
interpreter.SystemDefine("def", NewOperator(def))
interpreter.SystemDefine("load", NewOperator(load))
interpreter.SystemDefine("store", NewOperator(store))
//interpreter.SystemDefine("get", NewOperator(get)) // already define in operators_conflict.go
//interpreter.SystemDefine("put", NewOperator(put)) // already define in operators_conflict.go
interpreter.SystemDefine("undef", NewOperator(undef))
interpreter.SystemDefine("known", NewOperator(known))
interpreter.SystemDefine("where", NewOperator(where))
//interpreter.SystemDefine("copydict", NewOperator(copydict)) // already define in operators_conflict.go
//interpreter.SystemDefine("foralldict", NewOperator(foralldict)) // already define in operators_conflict.go
interpreter.SystemDefine("currentdict", NewOperator(currentdict))
interpreter.SystemDefine("systemdict", NewOperator(systemdict))
interpreter.SystemDefine("userdict", NewOperator(userdict))
interpreter.SystemDefine("globaldict", NewOperator(globaldict))
interpreter.SystemDefine("statusdict", NewOperator(statusdict))
interpreter.SystemDefine("countdictstack", NewOperator(countdictstack))
interpreter.SystemDefine("dictstack", NewOperator(dictstack))
interpreter.SystemDefine("cleardictstack", NewOperator(cleardictstack))
}