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/*-*-c++-*-
* $Id$
*
* This file is part of plptools.
*
* Copyright (C) 1999 Philip Proudman <philip.proudman@btinternet.com>
* Copyright (C) 2000, 2001 Fritz Elfert <felfert@to.com>
*
* 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
*
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include "bufferstore.h"
// Should be iostream.h, but won't build on Sun WorkShop C++ 5.0
#include <iomanip>
#include <string>
#include <stdlib.h>
#include <ctype.h>
#include <assert.h>
using namespace std;
bufferStore::bufferStore()
: len(0)
, lenAllocd(0)
, start(0)
, buff(0)
{
}
bufferStore::bufferStore(const bufferStore &a)
: start(0)
{
lenAllocd = (a.getLen() > MIN_LEN) ? a.getLen() : MIN_LEN;
buff = (unsigned char *)malloc(lenAllocd);
assert(buff);
len = a.getLen();
memcpy(buff, a.getString(0), len);
}
bufferStore::bufferStore(const unsigned char *_buff, long _len)
: start(0)
{
lenAllocd = (_len > MIN_LEN) ? _len : MIN_LEN;
buff = (unsigned char *)malloc(lenAllocd);
assert(buff);
len = _len;
memcpy(buff, _buff, len);
}
bufferStore &bufferStore::operator =(const bufferStore &a) {
if (this != &a) {
checkAllocd(a.getLen());
len = a.getLen();
memcpy(buff, a.getString(0), len);
start = 0;
}
return *this;
}
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() {
if (buff)
::free(buff);
}
unsigned long bufferStore::getLen() const {
return (start > len) ? 0 : len - start;
}
unsigned char bufferStore::getByte(long pos) const {
return buff[pos+start];
}
u_int16_t bufferStore::getWord(long pos) const {
return buff[pos+start] + (buff[pos+start+1] << 8);
}
u_int32_t 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) {
// save stream flags
ostream::fmtflags old = s.flags();
for (int i = m.start; i < m.len; i++)
s << hex << setw(2) << setfill('0') << (int)m.buff[i] << " ";
// restore stream flags
s.flags(old);
s << "(";
for (int i = m.start; i < m.len; i++) {
unsigned char c = m.buff[i];
s << (unsigned char)(isprint(c) ? c : '.');
}
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);
assert(lenAllocd);
buff = (unsigned char *)realloc(buff, lenAllocd);
assert(buff);
}
}
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::addBytes(const unsigned char *s, int l) {
checkAllocd(len + l);
memcpy(&buff[len], s, l);
len += l;
}
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;
}
void bufferStore::truncate(long newLen) {
if (newLen < len)
len = newLen;
}
void bufferStore::prependByte(unsigned char cc) {
checkAllocd(len + 1);
memmove(&buff[1], buff, len++);
buff[0] = cc;
}
void bufferStore::prependWord(int a) {
checkAllocd(len + 2);
memmove(&buff[2], buff, len);
len += 2;
buff[0] = a & 0xff;
buff[1] = (a>>8) & 0xff;
}
/*
* Local variables:
* c-basic-offset: 4
* End:
*/
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