Mercurial > hg > svcore
view base/ResizeableBitset.h @ 298:57d7889f626c
* Unload feature extraction plugin .so when destroyed
author | Chris Cannam |
---|---|
date | Fri, 28 Sep 2007 14:32:45 +0000 |
parents | 146eb9e35baa |
children | 95391b480e17 |
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/* -*- c-basic-offset: 4 indent-tabs-mode: nil -*- vi:set ts=8 sts=4 sw=4: */ /* Sonic Visualiser An audio file viewer and annotation editor. Centre for Digital Music, Queen Mary, University of London. This file copyright 2006 Chris Cannam. 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. See the file COPYING included with this distribution for more information. */ #ifndef _RESIZEABLE_BITMAP_H_ #define _RESIZEABLE_BITMAP_H_ #include <vector> #include <stdint.h> class ResizeableBitset { public: ResizeableBitset() : m_bits(0) { } ResizeableBitset(size_t size) : m_bits(new std::vector<uint8_t>) { m_bits->assign((size >> 3) + 1, 0); } ResizeableBitset(const ResizeableBitset &b) { m_bits = new std::vector<uint8_t>(*b.m_bits); } ResizeableBitset &operator=(const ResizeableBitset &b) { if (&b != this) return *this; delete m_bits; m_bits = new std::vector<uint8_t>(*b.m_bits); return *this; } ~ResizeableBitset() { delete m_bits; } void resize(size_t bits) { // losing all data if (!m_bits || bits < m_bits->size()) { delete m_bits; m_bits = new std::vector<uint8_t>; } m_bits->assign((bits >> 3) + 1, 0); } bool get(size_t column) const { return ((*m_bits)[column >> 3]) & (1u << (column & 0x07)); } void set(size_t column) { ((*m_bits)[column >> 3]) |= (uint8_t(1) << (column & 0x07)); } void reset(size_t column) { ((*m_bits)[column >> 3]) &= ~(uint8_t(1) << (column & 0x07)); } void copy(size_t source, size_t dest) { get(source) ? set(dest) : reset(dest); } private: std::vector<uint8_t> *m_bits; }; #endif