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- Dec 12, 2008
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I was in need of something to make messages in Warcraft III pop out Type-writer style, and that would require a Buffer. And since I had some other things that needed to use a buffer (Like a Unit order queue and an AI-Action/Behavior system), I decided that I needed to make them run off of one Buffer system. Hence, I wrote this.
The reason I called it BufferEx is because Nestharus' Save/Load system uses a library called Buffer which can be found in the Small Code Snippets thread.
Code
Demo
Feel free to comment.
The reason I called it BufferEx is because Nestharus' Save/Load system uses a library called Buffer which can be found in the Small Code Snippets thread.
Code
JASS:
/**********************************
*
* BufferEx
* v1.0.0.1
* By Magtheridon96
*
* - Data structure resource.
* This buffer is a FIFO (First in,
* First out) data structure.
* What you write first is read
* first.
*
* Optional Requirement:
* ---------------------
*
* - Table by Bribe
* - hiveworkshop.com/forums/jass-resources-412/snippet-new-table-188084/
*
* API:
* ----
*
* struct BufferEx extends array
*
* static method create takes nothing returns thistype
* - Creates a new buffer.
*
* method read takes nothing returns integer
* method write takes integer i returns nothing
* - Data IO functions.
*
* method operator empty takes nothing returns boolean
* - Determines whether the buffer is empty or not.
*
* method operator count takes nothing returns integer
* - Determines the amount of data left to read.
*
* method clear takes nothing returns nothing
* method reset takes nothing returns nothing
* - Clear all data in the buffer.
*
* method destroy takes nothing returns nothing
* - Destroy the buffer.
*
**********************************/
library BufferEx requires optional Table
globals
/*
* An empty buffer will be cleaned if it has more
* than THRESHOLD slots of unneeded data.
* This needs to be less than 8192.
* The smaller, the better.
* Do not make it too small though.
* Too Small = 10, 15, etc...
*
* We might as well clear the Buffer whenever possible,
* but that would be incredibly inefficient if a user
* is going to write, then read, then write, then read
* every single time. A threshold will minimize the
* number of times we are going to clear a Buffer.
*/
private constant integer THRESHOLD = 32
endglobals
struct BufferEx extends array
private static integer array rn
private static integer ic = 0
static if LIBRARY_Table then
private static Table array data
else
private static hashtable data = InitHashtable()
endif
private static integer array readIndex
private static integer array writeIndex
static method create takes nothing returns thistype
/*
* Allocate struct instance.
*/
local thistype this = rn[0]
if this == 0 then
set ic = ic + 1
set this = ic
else
set rn[0] = rn[this]
endif
/*
* If the table is null, we create
* it. I'm not destroying any tables.
* I'm only flushing them when a
* Buffer is destroyed.
*/
static if LIBRARY_Table then
if data[this] == 0 then
set data[this] = Table.create()
endif
endif
return this
endmethod
method operator empty takes nothing returns boolean
return readIndex[this] == writeIndex[this]
endmethod
method operator count takes nothing returns integer
return writeIndex[this] - readIndex[this]
endmethod
method clear takes nothing returns nothing
/*
* Reset the write index and the read index
* and clear all the data in the buffer.
*/
set writeIndex[this] = 0
set readIndex[this] = 0
static if LIBRARY_Table then
call data[this].flush()
else
call FlushChildHashtable(data, this)
endif
endmethod
method read takes nothing returns integer
local integer value
/*
* We will only read from the buffer
* if it actually has data in it.
*/
if not this.empty then
set readIndex[this] = readIndex[this] + 1
static if LIBRARY_Table then
set value = data[this][readIndex[this]]
else
set value = LoadInteger(data, this, readIndex[this])
endif
if this.empty and readIndex[this] >= THRESHOLD then
call this.clear()
endif
return value
debug else
debug call DisplayTimedTextToPlayer(GetLocalPlayer(), 0, 0, 60, "ATTEMPTED TO READ FROM EMPTY BUFFER.")
endif
return 0
endmethod
method write takes integer i returns nothing
/*
* We write the data.
*/
set writeIndex[this] = writeIndex[this] + 1
static if LIBRARY_Table then
set data[this][writeIndex[this]] = i
else
call SaveInteger(data, this, writeIndex[this], i)
endif
endmethod
method reset takes nothing returns nothing
call this.clear()
endmethod
method destroy takes nothing returns nothing
/*
* Deallocate struct instance.
*/
set rn[this] = rn[0]
set rn[0] = this
call this.clear()
endmethod
endstruct
endlibraryDemo
JASS:
struct Test extends array
static BufferEx myBuffer
private static method printStr takes string s returns nothing
call DisplayTimedTextToPlayer(GetLocalPlayer(), 0, 0, 60, s)
endmethod
private static method wait takes real time returns nothing
call TriggerSleepAction(time)
endmethod
private static method onInit takes nothing returns nothing
local integer index = 0
local integer array data
local boolean failure = false
set myBuffer = BufferEx.create()
set data[0] = 100
set data[1] = 242
set data[2] = 214
set data[3] = 245
set data[4] = 935
set data[5] = 652
loop
call myBuffer.write(data[index])
exitwhen index == 5
set index = index + 1
endloop
set index = 0
loop
if myBuffer.read() != data[index] then
set failure = true
endif
exitwhen index == 5
set index = index + 1
endloop
if not failure then
call printStr("Buffer Write Test 1 Successful")
else
call printStr("Buffer Write Test 1 Failed")
return
endif
call wait(1)
call myBuffer.clear()
if myBuffer.empty then
call printStr("Buffer Clear Test 1 Successful")
else
call printStr("Buffer Clear Test 1 Failed")
return
endif
call wait(1)
call myBuffer.write(4)
call myBuffer.write(5)
call myBuffer.write(9)
call myBuffer.write(7)
if myBuffer.read() == 4 then
if myBuffer.read() == 5 then
if myBuffer.read() == 9 then
if myBuffer.read() == 7 then
call printStr("Buffer Write Test 2 Successful")
else
call printStr("Buffer Write Test 2 Failed")
endif
else
call printStr("Buffer Write Test 2 Failed")
endif
else
call printStr("Buffer Write Test 2 Failed")
endif
else
call printStr("Buffer Write Test 2 Failed")
endif
call wait(1)
call myBuffer.clear()
if myBuffer.empty then
call printStr("Buffer Clear Test 2 Successful")
else
call printStr("Buffer Clear Test 2 Failed")
endif
call myBuffer.write(1)
call myBuffer.write(1)
call myBuffer.write(1)
call myBuffer.write(1)
call myBuffer.write(1)
call myBuffer.write(1)
call myBuffer.write(1)
call myBuffer.write(1)
call myBuffer.write(1)
call myBuffer.write(1)
call myBuffer.write(1)
call myBuffer.write(1)
call myBuffer.write(1)
call myBuffer.write(1)
call myBuffer.write(1)
call myBuffer.write(1)
call myBuffer.write(1)
call myBuffer.write(1)
call myBuffer.write(1)
call myBuffer.write(1)
call myBuffer.write(1)
call myBuffer.write(1)
call myBuffer.write(1)
call myBuffer.write(1)
call myBuffer.write(1)
call myBuffer.write(1)
call myBuffer.write(1)
call myBuffer.write(1)
call myBuffer.write(1)
call myBuffer.write(1)
call myBuffer.write(1)
call myBuffer.write(1)
call myBuffer.write(1)
call myBuffer.write(1)
call myBuffer.write(1)
call myBuffer.write(1)
call myBuffer.write(1)
call myBuffer.write(1)
call myBuffer.write(1)
call myBuffer.write(1)
call myBuffer.write(1)
call myBuffer.write(1)
call myBuffer.write(1)
call myBuffer.write(1)
call myBuffer.write(1)
call myBuffer.write(1)
call myBuffer.write(1)
call myBuffer.write(1)
call myBuffer.write(1)
call myBuffer.write(1)
call myBuffer.write(1)
call myBuffer.write(1)
call myBuffer.write(1)
call myBuffer.write(1)
call myBuffer.write(1)
call myBuffer.write(1)
call myBuffer.write(1)
call myBuffer.write(1)
call myBuffer.write(1)
call myBuffer.write(1)
call wait(1)
call myBuffer.read()
call myBuffer.read()
call myBuffer.read()
call myBuffer.read()
call myBuffer.read()
call myBuffer.read()
call myBuffer.read()
call myBuffer.read()
call myBuffer.read()
call myBuffer.read()
call myBuffer.read()
call myBuffer.read()
call myBuffer.read()
call myBuffer.read()
call myBuffer.read()
call myBuffer.read()
call myBuffer.read()
call myBuffer.read()
call myBuffer.read()
call myBuffer.read()
call myBuffer.read()
call myBuffer.read()
call myBuffer.read()
call myBuffer.read()
call myBuffer.read()
call myBuffer.read()
call myBuffer.read()
call myBuffer.read()
call myBuffer.read()
call myBuffer.read()
call myBuffer.read()
call myBuffer.read()
call myBuffer.read()
call myBuffer.read()
call myBuffer.read()
call myBuffer.read()
call myBuffer.read()
call myBuffer.read()
call myBuffer.read()
call myBuffer.read()
call myBuffer.read()
call myBuffer.read()
call myBuffer.read()
call myBuffer.read()
call myBuffer.read()
call myBuffer.read()
call myBuffer.read()
call myBuffer.read()
call myBuffer.read()
call myBuffer.read()
call myBuffer.read()
call myBuffer.read()
call myBuffer.read()
call myBuffer.read()
call myBuffer.read()
call myBuffer.read()
call myBuffer.read()
call myBuffer.read()
call myBuffer.read()
call myBuffer.read()
call wait(1)
if myBuffer.empty then
call printStr("Clear Test Successful.")
else
call printStr("Clear Test Failed.")
endif
endmethod
endstructFeel free to comment.
Last edited:
