Aegisub/devel/athenasub/src/fastbuffer.h
Amar Takhar 792225317e SVN Transition Step 6/7
1. svn mv OverLua SSATool athenasub avisynth_prs kanamemo \
     motiontracker prs traydict unit_test vsfilter devel/

* See r2749 for full description.

Originally committed to SVN as r2755.
2009-03-08 08:31:54 +00:00

105 lines
3.2 KiB
C++

// Copyright (c) 2005, Rodrigo Braz Monteiro
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
// * Redistributions of source code must retain the above copyright notice,
// this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above copyright notice,
// this list of conditions and the following disclaimer in the documentation
// and/or other materials provided with the distribution.
// * Neither the name of the Aegisub Group nor the names of its contributors
// may be used to endorse or promote products derived from this software
// without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
// POSSIBILITY OF SUCH DAMAGE.
//
// -----------------------------------------------------------------------------
//
// AEGISUB
//
// Website: http://aegisub.cellosoft.com
// Contact: mailto:zeratul@cellosoft.com
//
#pragma once
#include <vector>
#include "utils.h"
namespace Athenasub {
// Fast buffer class
template <typename T>
class FastBuffer {
private:
std::vector<T> buffer;
size_t _size;
public:
// Constructor
FastBuffer() { _size = 0; }
// Gets the stored size
size_t GetSize() const { return _size; }
// Shifts all the buffer left, destroying steps entries
void ShiftLeft(size_t steps) {
steps = Min(_size,steps);
memcpy(&buffer[0],&buffer[steps],(_size-steps)*sizeof(T));
_size -= steps;
}
// Get a read pointer
const T* GetReadPtr() const { return &buffer[0]; }
// Get a non-const read pointer
T* GetMutableReadPtr() { return &buffer[0]; }
// Get a write pointer to a new area of the specified size
T* GetWritePtr(size_t size) {
size_t oldSize = _size;
_size += size;
if (buffer.size() < _size+4) buffer.resize(_size+4);
return &buffer[oldSize];
}
// Assume that has a certain size, discarding anything beyond it
void AssumeSize(size_t size) {
_size = Min(size,_size);
}
// Pre-Allocates memory
void Alloc(size_t size) {
buffer.resize(size);
}
// Finds a line break
void FindLineBreak(size_t start,size_t end,int &pos,T &character) {
pos = -1;
character = 0;
size_t c1 = '\n';
size_t c2 = '\r';
size_t chr;
for (size_t i=start;i<end;i++) {
chr = buffer[i];
if (chr == c1 || chr == c2) {
pos = (int)i;
character = (T)chr;
return;
}
}
}
};
}