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/##
Copyright 2021-2022 Kyle Gunger
Dual licensed under the CDDL 1.0 and BSD 3-Clause licenses.
This file may only be used in accordance with one of the two
licenses. You should have received a copy of each license with
the source code. In the event that you did not recieve a copy
of the licenses, they may be found at the following URLs:
CDDL 1.0:
https://opensource.org/licenses/CDDL-1.0
BSD 3-Clause:
https://opensource.org/licenses/BSD-3-Clause
THIS SOFTWARE/SOURCE CODE IS PROVIDED "AS IS" WITH NO
WARRANTY, GUARANTEE, OR CLAIM OF FITNESS FOR ANY PURPOSE
EXPRESS OR IMPLIED
#/
# Interface for moving through a list
/; interface Iterator (type T)
# Advance to the next element in the list
/; next [bool] ;/
# Get the current element in the list
/; current [T] ;/
# Seek to the end of the iterator
# Returns true if this was successfull
/; end [bool] ;/
;/
# Interface for moving through a list forwards or backwards
/; interface DoubleIterator (type T) extends Iterator(T)
# Move to the previous element in the list
/; prev [bool] ;/
# Seek to the start of the iterator
# Returns true if this was successfull
/; start [bool] ;/
;/
# Iterate over an array
;raw struct ArrayIterator (type T) extends DoubleIterator(T) {
uint place,
~{}T data
}
/; method ArrayIterator
/; ArrayIterator (~{}T arr)
;self.place = 0
;self.data = arr
;/
/; override next [bool]
/; if (self.place + 1 >= len self.data`)
;self.place = len self.data`
;return false
;/
;self.place++
;return true
;/
/; override current [T]
;return self.data`{self.place}
;/
/; override prev [bool]
/; if (self.place == 0)
;return false
;/
;self.place--
;return true
;/
/; override end [bool]
;self.place = len self.data`
;return true
;/
/; override start [bool]
;self.place = 0
;return true
;/
;/
# Iterate over a pointer
;raw struct PointerIterator (type T) extends DoubleIterator(T) {
uint
place,
length,
~T data
}
/; method PointerIterator
/; PointerIterator (~T ptr, uint length)
;self.place = 0
;self.length = length
;self.data = ptr
;/
/; override next [bool]
/; if (self.place + 1 >= self.length)
;self.place = self.length
;return false
;/
;self.place++
;return true
;/
/; override current [T]
;return self.data{self.place}
;/
/; override prev [bool]
/; if (self.place == 0)
;return false
;/
;self.place--
;return true
;/
/; override end [bool]
;self.place = self.length
;return true
;/
/; override start [bool]
;self.place = 0
;return true
;/
;/
;struct ReverseIterator (type T) extends DoubleIterator(T) {
DoubleIterator(T) it
}
/; method ReverseIterator
/; ReverseIterator (DoubleIterator(T) it)
;self.it = it
;self.it.end()
;/
/; override next [bool]
;return self.it.prev()
;/
/; override current [T]
;return self.it.current()
;/
/; override prev [bool]
;return self.it.next()
;/
/; override end [bool]
;return self.it.start()
;/
/; override start [bool]
;return self.it.end()
;/
;/
|
