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//
// PLP - An implementation of the PSION link protocol
//
// Copyright (C) 1999 Philip Proudman
//
// 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; either version 2 of the License, or
// (at your option) any later version.
//
// 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
//
// e-mail philip.proudman@btinternet.com
#include <stream.h>
#include <iomanip.h>
#include <string.h>
#include "bufferstore.h"
bufferStore::bufferStore() {
lenAllocd = 0;
buff = NULL;
len = 0;
start = 0;
}
bufferStore::bufferStore(const bufferStore &a) {
lenAllocd = (a.getLen() > MIN_LEN) ? a.getLen() : MIN_LEN;
buff = new unsigned char [lenAllocd];
len = a.getLen();
memcpy(buff, a.getString(0), len);
start = 0;
}
bufferStore::bufferStore(const unsigned char*_buff, long _len) {
lenAllocd = (_len > MIN_LEN) ? _len : MIN_LEN;
buff = new unsigned char [lenAllocd];
len = _len;
memcpy(buff, _buff, len);
start = 0;
}
void bufferStore::operator =(const bufferStore &a) {
checkAllocd(a.getLen());
len = a.getLen();
memcpy(buff, a.getString(0), len);
start = 0;
}
void bufferStore::init() {
start = 0;
len = 0;
}
void bufferStore::init(const unsigned char*_buff, long _len) {
checkAllocd(_len);
start = 0;
len = _len;
memcpy(buff, _buff, len);
}
bufferStore::~bufferStore() {
delete [] buff;
}
unsigned long bufferStore::getLen() const {
return (start > len) ? 0 : len - start;
}
unsigned char bufferStore::getByte(long pos) const {
return buff[pos+start];
}
unsigned int bufferStore::getWord(long pos) const {
return buff[pos+start] + (buff[pos+start+1] << 8);
}
unsigned int bufferStore::getDWord(long pos) const {
return buff[pos+start] +
(buff[pos+start+1] << 8) +
(buff[pos+start+2] << 16) +
(buff[pos+start+3] << 24);
}
const char* bufferStore::getString(long pos) const {
return (const char*)buff+pos+start;
}
ostream &operator<<(ostream &s, const bufferStore &m) {
{
for (int i = m.start; i < m.len; i++)
s << hex << setw(2) << setfill('0') << (int)m.buff[i] << " ";
}
s << "(";
{
for (int i = m.start; i < m.len; i++) {
unsigned char c = m.buff[i];
if (c>=' ' && c <= 'z') s << c;
}
}
s<< ")";
return s;
}
void bufferStore::discardFirstBytes(int n) {
start += n;
if (start > len) start = len;
}
void bufferStore::checkAllocd(long newLen) {
if (newLen >= lenAllocd) {
do {
lenAllocd = (lenAllocd < MIN_LEN)?MIN_LEN:(lenAllocd*2);
} while (newLen >= lenAllocd);
unsigned char* newBuff = new unsigned char [lenAllocd];
memcpy(&newBuff[start], &buff[start], len - start);
delete [] buff;
buff = newBuff;
}
}
void bufferStore::addByte(unsigned char cc) {
checkAllocd(len + 1);
buff[len++] = cc;
}
void bufferStore::addString(const char* s) {
int l = strlen(s);
checkAllocd(len + l);
memcpy(&buff[len], s, l);
len += l;
}
void bufferStore::addStringT(const char* s) {
addString(s);
addByte(0);
}
void bufferStore::addBuff(const bufferStore &s, long maxLen) {
long l = s.getLen();
checkAllocd(len + l);
if ((maxLen >= 0) && (maxLen < l))
l = maxLen;
if (l > 0) {
memcpy(&buff[len], s.getString(0), l);
len += l;
}
}
void bufferStore::addWord(int a) {
checkAllocd(len + 2);
buff[len++] = a & 0xff;
buff[len++] = (a>>8) & 0xff;
}
void bufferStore::addDWord(long a) {
checkAllocd(len + 4);
buff[len++] = a & 0xff;
buff[len++] = (a>>8) & 0xff;
buff[len++] = (a>>16) & 0xff;
buff[len++] = (a>>24) & 0xff;
}
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