godot-xterm/addons/godot_xterm/parser/params.gd

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GDScript3
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2020-05-09 19:07:31 +02:00
# Copyright (c) 2020 The GodotTerm authors.
# Copyright (c) 2019 The xterm.js authors. All rights reserved.
# License MIT
extends Reference
# Max value supported for a single param/subparam (clamped to positive int32 range).
const MAX_VALUE = 0x7FFFFFFF;
# Max allowed subparams for a single sequence (hardcoded limitation).
const MAX_SUBPARAMS = 256;
var params = []
var length = 0
var sub_params = []
var sub_params_length = 0
var _max_length
var _max_sub_params_length
var sub_params_idx = []
var _reject_digits = false
var _reject_sub_digits = false
var digit_is_sub = false
static func from_array(values: Array):
# Workaround as per: https://github.com/godotengine/godot/issues/19345#issuecomment-471218401
var params = load("res://addons/godot_xterm/parser/params.gd").new()
if values.empty():
return params
# skip leading sub params
for i in range(values.size()):
var value = values[i]
if typeof(value) == TYPE_ARRAY:
if i == 0:
# skip leading sub params
continue
else:
for sub_param in value:
params.add_sub_param(sub_param)
else:
params.add_param(value)
return params
func _init(max_length: int = 32, max_sub_params_length: int = 32):
_max_length = max_length
_max_sub_params_length = max_sub_params_length
if (max_sub_params_length > MAX_SUBPARAMS):
push_error("max_sub_params_length must not be greater than 256")
params.resize(max_length)
sub_params.resize(max_sub_params_length)
sub_params_idx.resize(max_length)
func add_param(value: int):
digit_is_sub = false
if length >= _max_length:
_reject_digits = true
return
if value < -1:
push_error('values lesser than -1 are not allowed')
sub_params_idx[length] = sub_params_length << 8 | sub_params_length
params[length] = MAX_VALUE if value > MAX_VALUE else value
length += 1
func add_sub_param(value: int):
digit_is_sub = true
if !length:
return
if _reject_digits or sub_params_length >= _max_sub_params_length:
_reject_sub_digits = true
return
if value < -1:
push_error('values lesser than -1 are not allowed')
sub_params[sub_params_length] = MAX_VALUE if value > MAX_VALUE else value
sub_params_length += 1
sub_params_idx[length - 1] += 1
func add_digit(value: int):
print("adding digit: ", value, " is sub: ", digit_is_sub)
var _length = sub_params_length if digit_is_sub else length
if _reject_digits or (not _length) or (digit_is_sub and _reject_sub_digits):
return
var store = sub_params if digit_is_sub else params
var cur = store[_length - 1]
store[_length - 1] = min(cur * 10 + value, MAX_VALUE) if ~cur else value
func to_array():
var res = []
for i in range(length):
res.append(params[i])
var start = sub_params_idx[i] >> 8
var end = sub_params_idx[i] & 0xff
if end - start > 0:
res.append(sub_params.slice(start, end - 1))
return res
func reset():
length = 0
sub_params_length = 0
_reject_digits = false
_reject_sub_digits = false
digit_is_sub = false