From 4879eb1d78520ce0ac9b0bb0ef5244cf65ad7c99 Mon Sep 17 00:00:00 2001
From: Alexander Pickering <alexandermpickering@gmail.com>
Date: Wed, 4 Jan 2017 23:27:36 -0500
Subject: Started refactoring item and inventory system

---
 gamemode/utility/stream.lua | 85 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 85 insertions(+)
 create mode 100644 gamemode/utility/stream.lua

(limited to 'gamemode/utility/stream.lua')

diff --git a/gamemode/utility/stream.lua b/gamemode/utility/stream.lua
new file mode 100644
index 0000000..cdf3933
--- /dev/null
+++ b/gamemode/utility/stream.lua
@@ -0,0 +1,85 @@
+--[[
+	A stream object, has the methods:
+		stream:WriteString(string)	::		nil
+		stream:WriteInt(num,bytes)	::		nil
+
+		stream:ReadString()			::		string
+		stream:ReadInt(bytes)		::		number
+
+		stream:ToString()			::		string
+]]
+
+local ss = {}
+
+local function WriteString(self,string)
+	local buflen = #self.buf
+	for i=1,#string do
+		self.buf[buflen+i] = string.byte(string,i)
+	end
+	self.buf[#self.buf + 1] = 0
+end
+
+local function WriteInt(self,num,bytes)
+	local buflen = #self.buf
+	local byte = 255
+	for i = 1,bytes do
+		--[[
+		pack[i] = (num & byte) >> (i-1)*8
+		byte = 255 << i*8
+		]]
+		self.buf[buflen + i] = bit.rshift(bit.band(num,byte),(i-1)*8)
+		byte = bit.lshift(255,i*8)
+	end
+end
+
+local function ReadInt(self,len)
+	local tbl = {}
+	for i = 1, len do
+		tbl[i] = self.buf[i]
+	end
+	for i = 1, #self.buf do
+		self.buf[i] = self.buf[i+len]
+	end
+	local byte = 1
+	local num = 0
+	for i = 1, #tbl do
+		num = num + (tbl[i] * byte)
+		byte = 2 ^ (i*8)
+	end
+	return num
+end
+
+local function ReadString(self)
+	local str = {}
+	local strlen = 1
+	while self.buf[strlen] ~= 0 do
+		str[#str + 1] = string.char(self.buf[strlen])
+		strlen = strlen + 1
+	end
+	for i = 1,strlen do
+		self.buf[i] = self.buf[i+strlen]
+	end
+	return table.concat(str)
+end
+
+local function ToString(self)
+	return table.concat(self.buf)
+end
+
+function ss.CreateStream(str)
+	local ns = {}
+	ns.buf = {}
+	if str ~= nil then
+		for i = 1, #str do
+			ns[i] = str[i]
+		end
+	end
+	ns.ReadString = ReadString
+	ns.ReadInt = ReadInt
+	ns.WriteString = WriteString
+	ns.WriteInt = WriteInt
+	ns.ToString = ToString
+	return ns
+end
+
+return ss
-- 
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