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105 lines
2.5 KiB
C++
105 lines
2.5 KiB
C++
/* Copyright (C) 2002-2005 RealVNC Ltd. All Rights Reserved.
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*
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* This is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This software is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this software; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
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* USA.
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*/
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#include <rdr/HexOutStream.h>
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#include <rdr/Exception.h>
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using namespace rdr;
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const int DEFAULT_BUF_LEN = 16384;
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static inline size_t min(size_t a, size_t b) {return a<b ? a : b;}
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HexOutStream::HexOutStream(OutStream& os, size_t buflen)
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: out_stream(os), offset(0), bufSize(buflen ? buflen : DEFAULT_BUF_LEN)
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{
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if (bufSize % 2)
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bufSize--;
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ptr = start = new U8[bufSize];
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end = start + bufSize;
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}
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HexOutStream::~HexOutStream() {
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delete [] start;
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}
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char HexOutStream::intToHex(int i) {
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if ((i>=0) && (i<=9))
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return '0'+i;
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else if ((i>=10) && (i<=15))
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return 'a'+(i-10);
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else
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throw rdr::Exception("intToHex failed");
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}
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char* HexOutStream::binToHexStr(const char* data, size_t length) {
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char* buffer = new char[length*2+1];
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for (size_t i=0; i<length; i++) {
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buffer[i*2] = intToHex((data[i] >> 4) & 15);
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buffer[i*2+1] = intToHex((data[i] & 15));
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if (!buffer[i*2] || !buffer[i*2+1]) {
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delete [] buffer;
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return 0;
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}
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}
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buffer[length*2] = 0;
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return buffer;
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}
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void
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HexOutStream::writeBuffer() {
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U8* pos = start;
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while (pos != ptr) {
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out_stream.check(2);
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U8* optr = out_stream.getptr();
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U8* oend = out_stream.getend();
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size_t length = min(ptr-pos, (oend-optr)/2);
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for (size_t i=0; i<length; i++) {
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optr[i*2] = intToHex((pos[i] >> 4) & 0xf);
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optr[i*2+1] = intToHex(pos[i] & 0xf);
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}
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out_stream.setptr(optr + length*2);
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pos += length;
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}
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offset += ptr - start;
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ptr = start;
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}
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size_t HexOutStream::length()
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{
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return offset + ptr - start;
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}
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void
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HexOutStream::flush() {
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writeBuffer();
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out_stream.flush();
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}
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void HexOutStream::overrun(size_t needed) {
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if (needed > bufSize)
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throw Exception("HexOutStream overrun: buffer size exceeded");
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writeBuffer();
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}
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