THRIFT-1681: Add Lua Support Patch: Dave Watson
Github Pull Request: This closes #92
diff --git a/lib/lua/TMemoryBuffer.lua b/lib/lua/TMemoryBuffer.lua
new file mode 100644
index 0000000..3d43686
--- /dev/null
+++ b/lib/lua/TMemoryBuffer.lua
@@ -0,0 +1,91 @@
+--
+-- Licensed to the Apache Software Foundation (ASF) under one
+-- or more contributor license agreements. See the NOTICE file
+-- distributed with this work for additional information
+-- regarding copyright ownership. The ASF licenses this file
+-- to you under the Apache License, Version 2.0 (the
+-- "License"); you may not use this file except in compliance
+-- with the License. You may obtain a copy of the License at
+--
+-- http://www.apache.org/licenses/LICENSE-2.0
+--
+-- Unless required by applicable law or agreed to in writing,
+-- software distributed under the License is distributed on an
+-- "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+-- KIND, either express or implied. See the License for the
+-- specific language governing permissions and limitations
+-- under the License.
+--
+
+require 'TTransport'
+
+TMemoryBuffer = TTransportBase:new{
+ __type = 'TMemoryBuffer',
+ buffer = '',
+ bufferSize = 1024,
+ wPos = 0,
+ rPos = 0
+}
+function TMemoryBuffer:isOpen()
+ return 1
+end
+function TMemoryBuffer:open() end
+function TMemoryBuffer:close() end
+
+function TMemoryBuffer:peak()
+ return self.rPos < self.wPos
+end
+
+function TMemoryBuffer:getBuffer()
+ return self.buffer
+end
+
+function TMemoryBuffer:resetBuffer(buf)
+ if buf then
+ self.buffer = buf
+ self.bufferSize = string.len(buf)
+ else
+ self.buffer = ''
+ self.bufferSize = 1024
+ end
+ self.wPos = string.len(buf)
+ self.rPos = 0
+end
+
+function TMemoryBuffer:available()
+ return self.wPos - self.rPos
+end
+
+function TMemoryBuffer:read(len)
+ local avail = self:available()
+ if avail == 0 then
+ return ''
+ end
+
+ if avail < len then
+ len = avail
+ end
+
+ local val = string.sub(self.buffer, self.rPos, len)
+ self.rPos = self.rPos + len
+ return val
+end
+
+function TMemoryBuffer:readAll(len)
+ local avail = self:available()
+
+ if avail < len then
+ local msg = string.format('Attempt to readAll(%d) found only %d available',
+ len, avail)
+ terror(TTransportException:new{message = msg})
+ end
+ -- read should block so we don't need a loop here
+ return self:read(len)
+end
+
+function TMemoryBuffer:write(buf)
+ self.buffer = self.buffer + buf
+ self.wPos = self.wPos + buf
+end
+
+function TMemoryBuffer:flush() end