Merge branch 'save_ext' into jgrpp
# Conflicts: # src/saveload/saveload.cpppull/59/head
Jonathan G Rennison
6 years ago
commit
159909f4b1
@ -0,0 +1,266 @@
|
||||
/* $Id$ */
|
||||
|
||||
/*
|
||||
* This file is part of OpenTTD.
|
||||
* OpenTTD 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, version 2.
|
||||
* OpenTTD 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 OpenTTD. If not, see <http://www.gnu.org/licenses/>.
|
||||
*/
|
||||
|
||||
/** @file saveload_buffer.h Functions/types related to buffers used for saving and loading games. */
|
||||
|
||||
#ifndef SAVELOAD_BUFFER_H
|
||||
#define SAVELOAD_BUFFER_H
|
||||
|
||||
#include "../core/alloc_func.hpp"
|
||||
#include "../core/endian_type.hpp"
|
||||
#include "../core/endian_func.hpp"
|
||||
#include "../core/math_func.hpp"
|
||||
|
||||
#include <vector>
|
||||
#include <utility>
|
||||
|
||||
struct LoadFilter;
|
||||
struct SaveFilter;
|
||||
|
||||
/** Save in chunks of 128 KiB. */
|
||||
static const size_t MEMORY_CHUNK_SIZE = 128 * 1024;
|
||||
|
||||
/** A buffer for reading (and buffering) savegame data. */
|
||||
struct ReadBuffer {
|
||||
byte buf[MEMORY_CHUNK_SIZE]; ///< Buffer we're going to read from.
|
||||
byte *bufp; ///< Location we're at reading the buffer.
|
||||
byte *bufe; ///< End of the buffer we can read from.
|
||||
LoadFilter *reader; ///< The filter used to actually read.
|
||||
size_t read; ///< The amount of read bytes so far from the filter.
|
||||
|
||||
/**
|
||||
* Initialise our variables.
|
||||
* @param reader The filter to actually read data.
|
||||
*/
|
||||
ReadBuffer(LoadFilter *reader) : bufp(NULL), bufe(NULL), reader(reader), read(0)
|
||||
{
|
||||
}
|
||||
|
||||
static ReadBuffer *GetCurrent();
|
||||
|
||||
void SkipBytesSlowPath(size_t bytes);
|
||||
void AcquireBytes();
|
||||
|
||||
inline void SkipBytes(size_t bytes)
|
||||
{
|
||||
byte *b = this->bufp + bytes;
|
||||
if (likely(b <= this->bufe)) {
|
||||
this->bufp = b;
|
||||
} else {
|
||||
SkipBytesSlowPath(bytes);
|
||||
}
|
||||
}
|
||||
|
||||
inline byte RawReadByte()
|
||||
{
|
||||
return *this->bufp++;
|
||||
}
|
||||
|
||||
inline byte ReadByte()
|
||||
{
|
||||
if (unlikely(this->bufp == this->bufe)) {
|
||||
this->AcquireBytes();
|
||||
}
|
||||
|
||||
return RawReadByte();
|
||||
}
|
||||
|
||||
inline void CheckBytes(size_t bytes)
|
||||
{
|
||||
while (unlikely(this->bufp + bytes > this->bufe)) this->AcquireBytes();
|
||||
}
|
||||
|
||||
inline int RawReadUint16()
|
||||
{
|
||||
#if OTTD_ALIGNMENT == 0
|
||||
int x = FROM_BE16(*((const uint16*) this->bufp));
|
||||
this->bufp += 2;
|
||||
return x;
|
||||
#else
|
||||
int x = this->RawReadByte() << 8;
|
||||
return x | this->RawReadByte();
|
||||
#endif
|
||||
}
|
||||
|
||||
inline uint32 RawReadUint32()
|
||||
{
|
||||
#if OTTD_ALIGNMENT == 0
|
||||
uint32 x = FROM_BE32(*((const uint32*) this->bufp));
|
||||
this->bufp += 4;
|
||||
return x;
|
||||
#else
|
||||
uint32 x = this->RawReadUint16() << 16;
|
||||
return x | this->RawReadUint16();
|
||||
#endif
|
||||
}
|
||||
|
||||
inline uint64 RawReadUint64()
|
||||
{
|
||||
#if OTTD_ALIGNMENT == 0
|
||||
uint64 x = FROM_BE64(*((const uint64*) this->bufp));
|
||||
this->bufp += 8;
|
||||
return x;
|
||||
#else
|
||||
uint32 x = this->RawReadUint32();
|
||||
uint32 y = this->RawReadUint32();
|
||||
return (uint64)x << 32 | y;
|
||||
#endif
|
||||
}
|
||||
|
||||
inline void CopyBytes(byte *ptr, size_t length)
|
||||
{
|
||||
while (length) {
|
||||
if (unlikely(this->bufp == this->bufe)) {
|
||||
this->AcquireBytes();
|
||||
}
|
||||
size_t to_copy = min<size_t>(this->bufe - this->bufp, length);
|
||||
memcpy(ptr, this->bufp, to_copy);
|
||||
this->bufp += to_copy;
|
||||
ptr += to_copy;
|
||||
length -= to_copy;
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Get the size of the memory dump made so far.
|
||||
* @return The size.
|
||||
*/
|
||||
inline size_t GetSize() const
|
||||
{
|
||||
return this->read - (this->bufe - this->bufp);
|
||||
}
|
||||
};
|
||||
|
||||
|
||||
/** Container for dumping the savegame (quickly) to memory. */
|
||||
struct MemoryDumper {
|
||||
struct BufferInfo {
|
||||
byte *data;
|
||||
size_t size = 0;
|
||||
|
||||
BufferInfo(byte *d) : data(d) {}
|
||||
~BufferInfo() { free(this->data); }
|
||||
|
||||
BufferInfo(const BufferInfo &) = delete;
|
||||
BufferInfo(BufferInfo &&other) : data(other.data), size(other.size) { other.data = nullptr; };
|
||||
};
|
||||
|
||||
std::vector<BufferInfo> blocks; ///< Buffer with blocks of allocated memory.
|
||||
byte *buf = nullptr; ///< Buffer we're going to write to.
|
||||
byte *bufe = nullptr; ///< End of the buffer we write to.
|
||||
size_t completed_block_bytes = 0; ///< Total byte count of completed blocks.
|
||||
|
||||
byte *autolen_buf = nullptr;
|
||||
byte *autolen_buf_end = nullptr;
|
||||
byte *saved_buf = nullptr;
|
||||
byte *saved_bufe = nullptr;
|
||||
|
||||
MemoryDumper()
|
||||
{
|
||||
const size_t size = 8192;
|
||||
this->autolen_buf = CallocT<byte>(size);
|
||||
this->autolen_buf_end = this->autolen_buf + size;
|
||||
}
|
||||
|
||||
~MemoryDumper()
|
||||
{
|
||||
free(this->autolen_buf);
|
||||
}
|
||||
|
||||
static MemoryDumper *GetCurrent();
|
||||
|
||||
void FinaliseBlock();
|
||||
void AllocateBuffer();
|
||||
|
||||
inline void CheckBytes(size_t bytes)
|
||||
{
|
||||
if (unlikely(this->buf + bytes > this->bufe)) this->AllocateBuffer();
|
||||
}
|
||||
|
||||
/**
|
||||
* Write a single byte into the dumper.
|
||||
* @param b The byte to write.
|
||||
*/
|
||||
inline void WriteByte(byte b)
|
||||
{
|
||||
/* Are we at the end of this chunk? */
|
||||
if (unlikely(this->buf == this->bufe)) {
|
||||
this->AllocateBuffer();
|
||||
}
|
||||
|
||||
*this->buf++ = b;
|
||||
}
|
||||
|
||||
inline void CopyBytes(byte *ptr, size_t length)
|
||||
{
|
||||
while (length) {
|
||||
if (unlikely(this->buf == this->bufe)) {
|
||||
this->AllocateBuffer();
|
||||
}
|
||||
size_t to_copy = min<size_t>(this->bufe - this->buf, length);
|
||||
memcpy(this->buf, ptr, to_copy);
|
||||
this->buf += to_copy;
|
||||
ptr += to_copy;
|
||||
length -= to_copy;
|
||||
}
|
||||
}
|
||||
|
||||
inline void RawWriteByte(byte b)
|
||||
{
|
||||
*this->buf++ = b;
|
||||
}
|
||||
|
||||
inline void RawWriteUint16(uint16 v)
|
||||
{
|
||||
#if OTTD_ALIGNMENT == 0
|
||||
*((uint16 *) this->buf) = TO_BE16(v);
|
||||
#else
|
||||
this->buf[0] = GB(v, 8, 8));
|
||||
this->buf[1] = GB(v, 0, 8));
|
||||
#endif
|
||||
this->buf += 2;
|
||||
}
|
||||
|
||||
inline void RawWriteUint32(uint32 v)
|
||||
{
|
||||
#if OTTD_ALIGNMENT == 0
|
||||
*((uint32 *) this->buf) = TO_BE32(v);
|
||||
#else
|
||||
this->buf[0] = GB(v, 24, 8));
|
||||
this->buf[1] = GB(v, 16, 8));
|
||||
this->buf[2] = GB(v, 8, 8));
|
||||
this->buf[3] = GB(v, 0, 8));
|
||||
#endif
|
||||
this->buf += 4;
|
||||
}
|
||||
|
||||
inline void RawWriteUint64(uint64 v)
|
||||
{
|
||||
#if OTTD_ALIGNMENT == 0
|
||||
*((uint64 *) this->buf) = TO_BE64(v);
|
||||
#else
|
||||
this->buf[0] = GB(v, 56, 8));
|
||||
this->buf[1] = GB(v, 48, 8));
|
||||
this->buf[2] = GB(v, 40, 8));
|
||||
this->buf[3] = GB(v, 32, 8));
|
||||
this->buf[4] = GB(v, 24, 8));
|
||||
this->buf[5] = GB(v, 16, 8));
|
||||
this->buf[6] = GB(v, 8, 8));
|
||||
this->buf[7] = GB(v, 0, 8));
|
||||
#endif
|
||||
this->buf += 8;
|
||||
}
|
||||
|
||||
void Flush(SaveFilter *writer);
|
||||
size_t GetSize() const;
|
||||
void StartAutoLength();
|
||||
std::pair<byte *, size_t> StopAutoLength();
|
||||
};
|
||||
|
||||
#endif
|
||||
Loading…
Reference in New Issue