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local Queue = include("queue.lua");
local String = string
local Stream = {};
Stream.fromString = function(string)
local i=0;
return function()
print("string is:" .. string)
print("len is:" .. string.len(string))
print("i is:" .. i)
i=i+1;
if(i <= string.len(string)) then
return string.byte(string,i);
else
return nil;
end
end
end
Stream.toString = function(stream)
local array = {};
local i=1;
local byte = stream();
while byte ~= nil do
array[i] = String.char(byte);
i = i+1;
byte = stream();
end
return table.concat(array,"");
end
Stream.fromArray = function(array)
local queue = Queue();
local i=1;
local byte = array[i];
while byte ~= nil do
queue.push(byte);
i=i+1;
byte = array[i];
end
return queue.pop;
end
Stream.toArray = function(stream)
local array = {};
local i=1;
local byte = stream();
while byte ~= nil do
array[i] = byte;
i = i+1;
byte = stream();
end
return array;
end
local fromHexTable = {};
for i=0,255 do
fromHexTable[String.format("%02X",i)]=i;
fromHexTable[String.format("%02x",i)]=i;
end
Stream.fromHex = function(hex)
local queue = Queue();
for i=1,String.len(hex)/2 do
local h = String.sub(hex,i*2-1,i*2);
queue.push(fromHexTable[h]);
end
return queue.pop;
end
local toHexTable = {};
for i=0,255 do
toHexTable[i]=String.format("%02X",i);
end
Stream.toHex = function(stream)
print("tohex called with stream")
print(stream)
local hex = {};
local i = 1;
local byte = stream();
print("First byte is")
print(byte)
while byte ~= nil do
print("Createing hex:")
print(table.concat(hex,""))
hex[i] = toHexTable[byte];
i=i+1;
byte = stream();
end
return table.concat(hex,"");
end
return Stream;
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