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Diffstat (limited to 'rdr/OutStream.h')
-rw-r--r-- | rdr/OutStream.h | 152 |
1 files changed, 0 insertions, 152 deletions
diff --git a/rdr/OutStream.h b/rdr/OutStream.h deleted file mode 100644 index 9aae80c..0000000 --- a/rdr/OutStream.h +++ /dev/null @@ -1,152 +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::OutStream marshalls data into a buffer stored in RDR (RFB Data -// Representation). -// - -#ifndef __RDR_OUTSTREAM_H__ -#define __RDR_OUTSTREAM_H__ - -#include <rdr/types.h> -#include <string.h> // for memcpy - -namespace rdr { - - class OutStream { - - protected: - - OutStream() {} - - public: - - virtual ~OutStream() {} - - // check() ensures there is buffer space for at least one item of size - // itemSize bytes. Returns the number of items which fit (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; - } - - // writeU/SN() methods write unsigned and signed N-bit integers. - - inline void writeU8( U8 u) { check(1); *ptr++ = u; } - inline void writeU16(U16 u) { check(2); *ptr++ = u >> 8; *ptr++ = (U8)u; } - inline void writeU32(U32 u) { check(4); *ptr++ = u >> 24; *ptr++ = u >> 16; - *ptr++ = u >> 8; *ptr++ = u; } - - inline void writeS8( S8 s) { writeU8((U8)s); } - inline void writeS16(S16 s) { writeU16((U16)s); } - inline void writeS32(S32 s) { writeU32((U32)s); } - - // writeString() writes a string - a U32 length followed by the data. The - // given string should be null-terminated (but the terminating null is not - // written to the stream). - - inline void writeString(const char* str) { - U32 len = strlen(str); - writeU32(len); - writeBytes(str, len); - } - - inline void pad(int bytes) { - while (bytes-- > 0) writeU8(0); - } - - inline void skip(int bytes) { - while (bytes > 0) { - int n = check(1, bytes); - ptr += n; - bytes -= n; - } - } - - // writeBytes() writes an exact number of bytes. - - virtual void writeBytes(const void* data, int length) { - const U8* dataPtr = (const U8*)data; - const U8* dataEnd = dataPtr + length; - while (dataPtr < dataEnd) { - int n = check(1, dataEnd - dataPtr); - memcpy(ptr, dataPtr, n); - ptr += n; - dataPtr += n; - } - } - - // writeOpaqueN() writes a quantity without byte-swapping. - - inline void writeOpaque8( U8 u) { writeU8(u); } - inline void writeOpaque16(U16 u) { check(2); *ptr++ = ((U8*)&u)[0]; - *ptr++ = ((U8*)&u)[1]; } - inline void writeOpaque32(U32 u) { check(4); *ptr++ = ((U8*)&u)[0]; - *ptr++ = ((U8*)&u)[1]; - *ptr++ = ((U8*)&u)[2]; - *ptr++ = ((U8*)&u)[3]; } - inline void writeOpaque24A(U32 u) { check(3); *ptr++ = ((U8*)&u)[0]; - *ptr++ = ((U8*)&u)[1]; - *ptr++ = ((U8*)&u)[2]; } - inline void writeOpaque24B(U32 u) { check(3); *ptr++ = ((U8*)&u)[1]; - *ptr++ = ((U8*)&u)[2]; - *ptr++ = ((U8*)&u)[3]; } - - // length() returns the length of the stream. - - virtual int length() = 0; - - // flush() requests that the stream be flushed. - - virtual void flush() {} - - // 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 U8* getptr() { return ptr; } - inline U8* getend() { return end; } - inline void setptr(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 space. Returns - // the number of items which fit (up to a maximum of nItems). itemSize is - // supposed to be "small" (a few bytes). - - virtual int overrun(int itemSize, int nItems) = 0; - - protected: - - U8* ptr; - U8* end; - }; - -} - -#endif |