mirror of
https://github.com/kasmtech/KasmVNC.git
synced 2024-12-01 04:23:22 +01:00
259f1055cb
Provides safety against them accidentally becoming negative because of bugs in the calculations. Also does the same to CharArray and friends as they were strongly connection to the stream objects.
111 lines
2.6 KiB
C++
111 lines
2.6 KiB
C++
/* 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 size_t min(size_t a, size_t b) {return a<b ? a : b;}
|
|
|
|
HexOutStream::HexOutStream(OutStream& os, size_t 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, size_t length) {
|
|
char* buffer = new char[length*2+1];
|
|
for (size_t 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();
|
|
size_t length = min(ptr-pos, (oend-optr)/2);
|
|
|
|
for (size_t 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;
|
|
}
|
|
|
|
size_t HexOutStream::length()
|
|
{
|
|
return offset + ptr - start;
|
|
}
|
|
|
|
void
|
|
HexOutStream::flush() {
|
|
writeBuffer();
|
|
out_stream.flush();
|
|
}
|
|
|
|
size_t
|
|
HexOutStream::overrun(size_t itemSize, size_t nItems) {
|
|
if (itemSize > bufSize)
|
|
throw Exception("HexOutStream overrun: max itemSize exceeded");
|
|
|
|
writeBuffer();
|
|
|
|
if (itemSize * nItems > (size_t)(end - ptr))
|
|
nItems = (end - ptr) / itemSize;
|
|
|
|
return nItems;
|
|
}
|
|
|