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/*
* Copyright (c) 2001, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code 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
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*
*/
#include "Buffer.hpp"
#include <string.h>
Buffer::Buffer(int bufSize) {
buf = new char[bufSize];
sz = bufSize;
fill = 0;
drain = 0;
}
Buffer::~Buffer() {
delete[] buf;
}
char*
Buffer::fillPos() {
return buf + fill;
}
int
Buffer::remaining() {
return sz - fill;
}
int
Buffer::size() {
return sz;
}
bool
Buffer::incrFillPos(int amt) {
if (fill + amt >= sz) {
return false;
}
fill += amt;
return true;
}
int
Buffer::readByte() {
if (drain < fill) {
return buf[drain++] & 0xFF;
} else {
return -1;
}
}
int
Buffer::readBytes(char* data, int len) {
int numRead = 0;
while (numRead < len) {
int c = readByte();
if (c < 0) break;
data[numRead++] = (char) c;
}
return numRead;
}
char*
Buffer::drainPos() {
return buf + drain;
}
int
Buffer::drainRemaining() {
return fill - drain;
}
bool
Buffer::incrDrainPos(int amt) {
if (drainRemaining() < amt) {
return false;
}
drain += amt;
return true;
}
void
Buffer::compact() {
// Copy down data
memmove(buf, buf + drain, fill - drain);
// Adjust positions
fill -= drain;
drain = 0;
}
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