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// --- BEGIN COPYRIGHT BLOCK ---
// This program 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; version 2 of the License.
//
// This program 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 program; if not, write to the Free Software Foundation, Inc.,
// 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
//
// (C) 2007 Red Hat, Inc.
// All rights reserved.
// --- END COPYRIGHT BLOCK ---
#include <memory.h>
#include <assert.h>
#include <stdio.h>
#include <cstdarg>
#include <string>
#include "Buffer.h"
Buffer::Buffer(const BYTE *buf_, unsigned int len_) : len(len_), res(len_)
{
buf = new BYTE[len];
memcpy(buf, buf_, len);
}
Buffer::Buffer(const Buffer& cpy)
{
buf = 0;
*this = cpy;
}
Buffer::Buffer(unsigned int len_) : len(len_), res(len_)
{
buf = new BYTE[res];
memset(buf, 0, len_);
}
Buffer::Buffer(unsigned int len_, BYTE b) : len(len_), res(len_)
{
buf = new BYTE[res];
memset(buf, b, len);
}
Buffer::~Buffer()
{
delete [] buf;
}
bool
Buffer::operator==(const Buffer& cmp) const
{
if( len != cmp.len ) return false;
for( unsigned int i=0; i < len; ++i ) {
if( buf[i] != cmp.buf[i] ) {
return false;
}
}
return true;
}
Buffer&
Buffer::operator=(const Buffer& cpy)
{
if( this == &cpy ) return *this;
len = cpy.len;
delete [] buf;
buf = new BYTE[len];
memcpy(buf, cpy.buf, len);
res = len;
return *this;
}
void
Buffer::zeroize()
{
if( len > 0 ) {
memset( buf, 0, len );
}
}
Buffer
Buffer::operator+(const Buffer& addend) const
{
Buffer result(len + addend.len);
memcpy(result.buf, buf, len);
memcpy(result.buf+len, addend.buf, addend.len);
return result;
}
Buffer&
Buffer::operator+=(const Buffer& addend)
{
unsigned int oldLen = len;
resize(len + addend.len);
memcpy(buf+oldLen, addend.buf, addend.len);
return *this;
}
Buffer&
Buffer::operator+=(BYTE b)
{
resize(len+1);
buf[len-1] = b;
return *this;
}
void
Buffer::reserve(unsigned int n)
{
if( n > res ) {
BYTE *newBuf = new BYTE[n];
memcpy(newBuf, buf, len);
delete [] buf;
buf = newBuf;
res = n;
}
}
void
Buffer::resize(unsigned int newLen)
{
if( newLen == len ) {
return;
} else if( newLen < len ) {
len = newLen;
} else if( newLen <= res ) {
assert( newLen > len );
memset(buf+len, 0, newLen-len);
len = newLen;
} else {
assert( newLen > len && newLen > res );
BYTE *newBuf = new BYTE[newLen];
memcpy(newBuf, buf, len);
memset(newBuf+len, 0, newLen-len);
delete [] buf;
buf = newBuf;
len = newLen;
res = newLen;
}
}
Buffer
Buffer::substr(unsigned int i, unsigned int n) const
{
assert( i < len && (i+n) <= len );
return Buffer( buf+i, n );
}
void
Buffer::replace(unsigned int i, const BYTE* cpy, unsigned int n)
{
if (len > i+n) {
resize( len);
}else {
resize( i+n );
}
memcpy(buf+i, cpy, n);
}
void
Buffer::dump() const
{
unsigned int i;
for( i=0; i < len; ++i ) {
printf("%02x ", buf[i]);
if( i % 16 == 15 ) printf("\n");
}
printf("\n");
}
static const char hextbl[] = {
'0', '1', '2', '3', '4', '5', '6', '7',
'8', '9', 'A', 'B', 'C', 'D', 'E', 'F'
};
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