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- /* Copyright (C) 2002-2005 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.
- */
-
- #include <rdr/HexOutStream.h>
- #include <rdr/Exception.h>
-
- using namespace rdr;
-
- const int DEFAULT_BUF_LEN = 16384;
-
- static inline int min(int a, int b) {return a<b ? a : b;}
-
- HexOutStream::HexOutStream(OutStream& os, int buflen)
- : out_stream(os), offset(0), bufSize(buflen ? buflen : DEFAULT_BUF_LEN)
- {
- if (bufSize % 2)
- bufSize--;
- ptr = start = new U8[bufSize];
- end = start + bufSize;
- }
-
- HexOutStream::~HexOutStream() {
- delete [] start;
- }
-
-
- char HexOutStream::intToHex(int i) {
- if ((i>=0) && (i<=9))
- return '0'+i;
- else if ((i>=10) && (i<=15))
- return 'a'+(i-10);
- else
- throw rdr::Exception("intToHex failed");
- }
-
- char* HexOutStream::binToHexStr(const char* data, int length) {
- char* buffer = new char[length*2+1];
- for (int i=0; i<length; i++) {
- buffer[i*2] = intToHex((data[i] >> 4) & 15);
- buffer[i*2+1] = intToHex((data[i] & 15));
- if (!buffer[i*2] || !buffer[i*2+1]) {
- delete [] buffer;
- return 0;
- }
- }
- buffer[length*2] = 0;
- return buffer;
- }
-
-
- void
- HexOutStream::writeBuffer() {
- U8* pos = start;
- while (pos != ptr) {
- out_stream.check(2);
- U8* optr = out_stream.getptr();
- U8* oend = out_stream.getend();
- int length = min(ptr-pos, (oend-optr)/2);
-
- for (int i=0; i<length; i++) {
- optr[i*2] = intToHex((pos[i] >> 4) & 0xf);
- optr[i*2+1] = intToHex(pos[i] & 0xf);
- }
-
- out_stream.setptr(optr + length*2);
- pos += length;
- }
- offset += ptr - start;
- ptr = start;
- }
-
- int HexOutStream::length()
- {
- return offset + ptr - start;
- }
-
- void
- HexOutStream::flush() {
- writeBuffer();
- out_stream.flush();
- }
-
- int
- HexOutStream::overrun(int itemSize, int nItems) {
- if (itemSize > bufSize)
- throw Exception("HexOutStream overrun: max itemSize exceeded");
-
- writeBuffer();
-
- if (itemSize * nItems > end - ptr)
- nItems = (end - ptr) / itemSize;
-
- return nItems;
- }
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