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Diffstat (limited to 'rdr/InStream.h')
-rw-r--r-- | rdr/InStream.h | 143 |
1 files changed, 0 insertions, 143 deletions
diff --git a/rdr/InStream.h b/rdr/InStream.h deleted file mode 100644 index 2e2159e..0000000 --- a/rdr/InStream.h +++ /dev/null @@ -1,143 +0,0 @@ -// -// Copyright (C) 2002 RealVNC Ltd. All Rights Reserved. -// -// This is free software; you can redistribute it and/or modify -// it under the terms of the GNU General Public License as published by -// the Free Software Foundation; either version 2 of the License, or -// (at your option) any later version. -// -// This software is distributed in the hope that it will be useful, -// but WITHOUT ANY WARRANTY; without even the implied warranty of -// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -// GNU General Public License for more details. -// -// You should have received a copy of the GNU General Public License -// along with this software; if not, write to the Free Software -// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, -// USA. - -// -// rdr::InStream marshalls data from a buffer stored in RDR (RFB Data -// Representation). -// - -#ifndef __RDR_INSTREAM_H__ -#define __RDR_INSTREAM_H__ - -#include <rdr/types.h> -#include <string.h> // for memcpy - -namespace rdr { - - class InStream { - - public: - - virtual ~InStream() {} - - // check() ensures there is buffer data for at least one item of size - // itemSize bytes. Returns the number of items in the buffer (up to a - // maximum of nItems). - - inline int check(int itemSize, int nItems=1) - { - if (ptr + itemSize * nItems > end) { - if (ptr + itemSize > end) - return overrun(itemSize, nItems); - - nItems = (end - ptr) / itemSize; - } - return nItems; - } - - // readU/SN() methods read unsigned and signed N-bit integers. - - inline U8 readU8() { check(1); return *ptr++; } - inline U16 readU16() { check(2); int b0 = *ptr++; int b1 = *ptr++; - return b0 << 8 | b1; } - inline U32 readU32() { check(4); int b0 = *ptr++; int b1 = *ptr++; - int b2 = *ptr++; int b3 = *ptr++; - return b0 << 24 | b1 << 16 | b2 << 8 | b3; } - - inline S8 readS8() { return (S8) readU8(); } - inline S16 readS16() { return (S16)readU16(); } - inline S32 readS32() { return (S32)readU32(); } - - // readString() reads a string - a U32 length followed by the data. - // Returns a null-terminated string - the caller should delete[] it - // afterwards. - - char* readString(); - - // maxStringLength protects against allocating a huge buffer. Set it - // higher if you need longer strings. - - static U32 maxStringLength; - - inline void skip(int bytes) { - while (bytes > 0) { - int n = check(1, bytes); - ptr += n; - bytes -= n; - } - } - - // readBytes() reads an exact number of bytes. - - virtual void readBytes(void* data, int length) { - U8* dataPtr = (U8*)data; - U8* dataEnd = dataPtr + length; - while (dataPtr < dataEnd) { - int n = check(1, dataEnd - dataPtr); - memcpy(dataPtr, ptr, n); - ptr += n; - dataPtr += n; - } - } - - // readOpaqueN() reads a quantity without byte-swapping. - - inline U8 readOpaque8() { return readU8(); } - inline U16 readOpaque16() { check(2); U16 r; ((U8*)&r)[0] = *ptr++; - ((U8*)&r)[1] = *ptr++; return r; } - inline U32 readOpaque32() { check(4); U32 r; ((U8*)&r)[0] = *ptr++; - ((U8*)&r)[1] = *ptr++; ((U8*)&r)[2] = *ptr++; - ((U8*)&r)[3] = *ptr++; return r; } - inline U32 readOpaque24A() { check(3); U32 r=0; ((U8*)&r)[0] = *ptr++; - ((U8*)&r)[1] = *ptr++; ((U8*)&r)[2] = *ptr++; - return r; } - inline U32 readOpaque24B() { check(3); U32 r=0; ((U8*)&r)[1] = *ptr++; - ((U8*)&r)[2] = *ptr++; ((U8*)&r)[3] = *ptr++; - return r; } - - // pos() returns the position in the stream. - - virtual int pos() = 0; - - // getptr(), getend() and setptr() are "dirty" methods which allow you to - // manipulate the buffer directly. This is useful for a stream which is a - // wrapper around an underlying stream. - - inline const U8* getptr() const { return ptr; } - inline const U8* getend() const { return end; } - inline void setptr(const U8* p) { ptr = p; } - - private: - - // overrun() is implemented by a derived class to cope with buffer overrun. - // It ensures there are at least itemSize bytes of buffer data. Returns - // the number of items in the buffer (up to a maximum of nItems). itemSize - // is supposed to be "small" (a few bytes). - - virtual int overrun(int itemSize, int nItems) = 0; - - protected: - - InStream() {} - const U8* ptr; - const U8* end; - }; - -} - -#endif |