| /* |
| * Copyright 2001 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| * CA 95054 USA or visit www.sun.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; |
| } |