1 /* 2 * Copyright 2006-2012 The FLWOR Foundation. 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #pragma once 18 19 #ifndef API_ZORBA_STREAM_BUFFER_H 20 #define API_ZORBA_STREAM_BUFFER_H 21 22 #include <streambuf> 23 #include <cstdio> 24 #include <cstdlib> 25 #include <vector> 26 #include "ZorbaStreamBuffer.h" 27 28 29 class ZorbaStreamBuffer : 30 public std::streambuf 31 { 32 public: ZorbaStreamBuffer(ZorbaIOStream & aStreamWrapper)33 ZorbaStreamBuffer(ZorbaIOStream &aStreamWrapper): bBegin(0), bEnd(0), bCurrent(0), buffer(0), streamWrapper(&aStreamWrapper) {}; ~ZorbaStreamBuffer()34 virtual ~ZorbaStreamBuffer() {}; 35 36 // HELPER 37 // Function to return EOF character from other languages 38 static int getEOF(); 39 40 // INPUT 41 // Get character in the case of underflow 42 int underflow(); 43 // Get character in the case of underflow and advance get pointer 44 int uflow(); 45 // Put character back in the case of backup underflow 46 int pbackfail(int ch); 47 // Get number of characters available in the sequence 48 std::streamsize showmanyc(); 49 50 // OUTPUT 51 // Write sequence of characters <Inherited> 52 virtual std::streamsize xsputn ( const char * BYTE, std::streamsize len ); 53 // Write character in the case of overflow 54 virtual int overflow ( int c = EOF ); 55 56 57 58 59 private: 60 void checkBuffer(); 61 // Copy contructor and assignment not allowed 62 ZorbaStreamBuffer(const ZorbaStreamBuffer &); 63 ZorbaStreamBuffer &operator= (const ZorbaStreamBuffer &); 64 65 //BUFFER 66 char * buffer; 67 char * bBegin; 68 char * bEnd; 69 char * bCurrent; 70 ZorbaIOStream *streamWrapper; 71 72 char * cBuffer; 73 }; 74 75 #endif 76