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citra/src/common/chunk_file.h

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// Copyright (C) 2003 Dolphin Project.
// 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, version 2.0 or later versions.
// This program 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 2.0 for more details.
// A copy of the GPL 2.0 should have been included with the program.
// If not, see http://www.gnu.org/licenses/
// Official SVN repository and contact information can be found at
// http://code.google.com/p/dolphin-emu/
#ifndef _POINTERWRAP_H_
#define _POINTERWRAP_H_
// Extremely simple serialization framework.
// (mis)-features:
// + Super fast
// + Very simple
// + Same code is used for serialization and deserializaition (in most cases)
// - Zero backwards/forwards compatibility
// - Serialization code for anything complex has to be manually written.
#include <map>
#include <vector>
#include <deque>
#include <string>
#include <list>
#include <set>
#ifndef __SYMBIAN32__
#if defined(IOS) || defined(MACGNUSTD)
#include <tr1/type_traits>
#else
#include <type_traits>
#endif
#endif
#include "common/common.h"
#include "common/file_util.h"
//#include "../ext/snappy/snappy-c.h"
#if defined(IOS) || defined(MACGNUSTD)
namespace std {
using tr1::is_pointer;
}
#endif
#ifdef __SYMBIAN32__
namespace std {
template <bool bool_value>
struct bool_constant {
typedef bool_constant<bool_value> type;
static const bool value = bool_value;
};
template <bool bool_value> const bool bool_constant<bool_value>::value;
template <typename T> struct is_pointer : public bool_constant<false> {};
template <typename T> struct is_pointer<T*> : public bool_constant<true> {};
}
#endif
template <class T>
struct LinkedListItem : public T
{
LinkedListItem<T> *next;
};
class PointerWrap;
class PointerWrapSection
{
public:
PointerWrapSection(PointerWrap &p, int ver, const char *title) : p_(p), ver_(ver), title_(title) {
}
~PointerWrapSection();
bool operator == (const int &v) const { return ver_ == v; }
bool operator != (const int &v) const { return ver_ != v; }
bool operator <= (const int &v) const { return ver_ <= v; }
bool operator >= (const int &v) const { return ver_ >= v; }
bool operator < (const int &v) const { return ver_ < v; }
bool operator > (const int &v) const { return ver_ > v; }
operator bool() const {
return ver_ > 0;
}
private:
PointerWrap &p_;
int ver_;
const char *title_;
};
// Wrapper class
class PointerWrap
{
// This makes it a compile error if you forget to define DoState() on non-POD.
// Which also can be a problem, for example struct tm is non-POD on linux, for whatever reason...
#ifdef _MSC_VER
template<typename T, bool isPOD = std::is_pod<T>::value, bool isPointer = std::is_pointer<T>::value>
#else
template<typename T, bool isPOD = __is_pod(T), bool isPointer = std::is_pointer<T>::value>
#endif
struct DoHelper
{
static void DoArray(PointerWrap *p, T *x, int count)
{
for (int i = 0; i < count; ++i)
p->Do(x[i]);
}
static void Do(PointerWrap *p, T &x)
{
p->DoClass(x);
}
};
template<typename T>
struct DoHelper<T, true, false>
{
static void DoArray(PointerWrap *p, T *x, int count)
{
p->DoVoid((void *)x, sizeof(T) * count);
}
static void Do(PointerWrap *p, T &x)
{
p->DoVoid((void *)&x, sizeof(x));
}
};
public:
enum Mode {
MODE_READ = 1, // load
MODE_WRITE, // save
MODE_MEASURE, // calculate size
MODE_VERIFY, // compare
};
enum Error {
ERROR_NONE = 0,
ERROR_WARNING = 1,
ERROR_FAILURE = 2,
};
u8 **ptr;
Mode mode;
Error error;
public:
PointerWrap(u8 **ptr_, Mode mode_) : ptr(ptr_), mode(mode_), error(ERROR_NONE) {}
PointerWrap(unsigned char **ptr_, int mode_) : ptr((u8**)ptr_), mode((Mode)mode_), error(ERROR_NONE) {}
PointerWrapSection Section(const char *title, int ver) {
return Section(title, ver, ver);
}
// The returned object can be compared against the version that was loaded.
// This can be used to support versions as old as minVer.
// Version = 0 means the section was not found.
PointerWrapSection Section(const char *title, int minVer, int ver) {
char marker[16] = {0};
int foundVersion = ver;
strncpy(marker, title, sizeof(marker));
if (!ExpectVoid(marker, sizeof(marker)))
{
// Might be before we added name markers for safety.
if (foundVersion == 1 && ExpectVoid(&foundVersion, sizeof(foundVersion)))
DoMarker(title);
// Wasn't found, but maybe we can still load the state.
else
foundVersion = 0;
}
else
Do(foundVersion);
if (error == ERROR_FAILURE || foundVersion < minVer || foundVersion > ver) {
WARN_LOG(COMMON, "Savestate failure: wrong version %d found for %s", foundVersion, title);
SetError(ERROR_FAILURE);
return PointerWrapSection(*this, -1, title);
}
return PointerWrapSection(*this, foundVersion, title);
}
void SetMode(Mode mode_) {mode = mode_;}
Mode GetMode() const {return mode;}
u8 **GetPPtr() {return ptr;}
void SetError(Error error_)
{
if (error < error_)
error = error_;
if (error > ERROR_WARNING)
mode = PointerWrap::MODE_MEASURE;
}
bool ExpectVoid(void *data, int size)
{
switch (mode) {
case MODE_READ: if (memcmp(data, *ptr, size) != 0) return false; break;
case MODE_WRITE: memcpy(*ptr, data, size); break;
case MODE_MEASURE: break; // MODE_MEASURE - don't need to do anything
case MODE_VERIFY: for(int i = 0; i < size; i++) _dbg_assert_msg_(COMMON, ((u8*)data)[i] == (*ptr)[i], "Savestate verification failure: %d (0x%X) (at %p) != %d (0x%X) (at %p).\n", ((u8*)data)[i], ((u8*)data)[i], &((u8*)data)[i], (*ptr)[i], (*ptr)[i], &(*ptr)[i]); break;
default: break; // throw an error?
}
(*ptr) += size;
return true;
}
void DoVoid(void *data, int size)
{
switch (mode) {
case MODE_READ: memcpy(data, *ptr, size); break;
case MODE_WRITE: memcpy(*ptr, data, size); break;
case MODE_MEASURE: break; // MODE_MEASURE - don't need to do anything
case MODE_VERIFY: for(int i = 0; i < size; i++) _dbg_assert_msg_(COMMON, ((u8*)data)[i] == (*ptr)[i], "Savestate verification failure: %d (0x%X) (at %p) != %d (0x%X) (at %p).\n", ((u8*)data)[i], ((u8*)data)[i], &((u8*)data)[i], (*ptr)[i], (*ptr)[i], &(*ptr)[i]); break;
default: break; // throw an error?
}
(*ptr) += size;
}
template<class K, class T>
void Do(std::map<K, T *> &x)
{
if (mode == MODE_READ)
{
for (auto it = x.begin(), end = x.end(); it != end; ++it)
{
if (it->second != NULL)
delete it->second;
}
}
T *dv = NULL;
DoMap(x, dv);
}
template<class K, class T>
void Do(std::map<K, T> &x)
{
T dv = T();
DoMap(x, dv);
}
template<class K, class T>
void DoMap(std::map<K, T> &x, T &default_val)
{
unsigned int number = (unsigned int)x.size();
Do(number);
switch (mode) {
case MODE_READ:
{
x.clear();
while (number > 0)
{
K first = K();
Do(first);
T second = default_val;
Do(second);
x[first] = second;
--number;
}
}
break;
case MODE_WRITE:
case MODE_MEASURE:
case MODE_VERIFY:
{
typename std::map<K, T>::iterator itr = x.begin();
while (number > 0)
{
K first = itr->first;
Do(first);
Do(itr->second);
--number;
++itr;
}
}
break;
}
}
template<class K, class T>
void Do(std::multimap<K, T *> &x)
{
if (mode == MODE_READ)
{
for (auto it = x.begin(), end = x.end(); it != end; ++it)
{
if (it->second != NULL)
delete it->second;
}
}
T *dv = NULL;
DoMultimap(x, dv);
}
template<class K, class T>
void Do(std::multimap<K, T> &x)
{
T dv = T();
DoMultimap(x, dv);
}
template<class K, class T>
void DoMultimap(std::multimap<K, T> &x, T &default_val)
{
unsigned int number = (unsigned int)x.size();
Do(number);
switch (mode) {
case MODE_READ:
{
x.clear();
while (number > 0)
{
K first = K();
Do(first);
T second = default_val;
Do(second);
x.insert(std::make_pair(first, second));
--number;
}
}
break;
case MODE_WRITE:
case MODE_MEASURE:
case MODE_VERIFY:
{
typename std::multimap<K, T>::iterator itr = x.begin();
while (number > 0)
{
Do(itr->first);
Do(itr->second);
--number;
++itr;
}
}
break;
}
}
// Store vectors.
template<class T>
void Do(std::vector<T *> &x)
{
T *dv = NULL;
DoVector(x, dv);
}
template<class T>
void Do(std::vector<T> &x)
{
T dv = T();
DoVector(x, dv);
}
template<class T>
void DoPOD(std::vector<T> &x)
{
T dv = T();
DoVectorPOD(x, dv);
}
template<class T>
void Do(std::vector<T> &x, T &default_val)
{
DoVector(x, default_val);
}
template<class T>
void DoVector(std::vector<T> &x, T &default_val)
{
u32 vec_size = (u32)x.size();
Do(vec_size);
x.resize(vec_size, default_val);
if (vec_size > 0)
DoArray(&x[0], vec_size);
}
template<class T>
void DoVectorPOD(std::vector<T> &x, T &default_val)
{
u32 vec_size = (u32)x.size();
Do(vec_size);
x.resize(vec_size, default_val);
if (vec_size > 0)
DoArray(&x[0], vec_size);
}
// Store deques.
template<class T>
void Do(std::deque<T *> &x)
{
T *dv = NULL;
DoDeque(x, dv);
}
template<class T>
void Do(std::deque<T> &x)
{
T dv = T();
DoDeque(x, dv);
}
template<class T>
void DoDeque(std::deque<T> &x, T &default_val)
{
u32 deq_size = (u32)x.size();
Do(deq_size);
x.resize(deq_size, default_val);
u32 i;
for(i = 0; i < deq_size; i++)
Do(x[i]);
}
// Store STL lists.
template<class T>
void Do(std::list<T *> &x)
{
T *dv = NULL;
Do(x, dv);
}
template<class T>
void Do(std::list<T> &x)
{
T dv = T();
DoList(x, dv);
}
template<class T>
void Do(std::list<T> &x, T &default_val)
{
DoList(x, default_val);
}
template<class T>
void DoList(std::list<T> &x, T &default_val)
{
u32 list_size = (u32)x.size();
Do(list_size);
x.resize(list_size, default_val);
typename std::list<T>::iterator itr, end;
for (itr = x.begin(), end = x.end(); itr != end; ++itr)
Do(*itr);
}
// Store STL sets.
template <class T>
void Do(std::set<T *> &x)
{
if (mode == MODE_READ)
{
for (auto it = x.begin(), end = x.end(); it != end; ++it)
{
if (*it != NULL)
delete *it;
}
}
DoSet(x);
}
template <class T>
void Do(std::set<T> &x)
{
DoSet(x);
}
template <class T>
void DoSet(std::set<T> &x)
{
unsigned int number = (unsigned int)x.size();
Do(number);
switch (mode)
{
case MODE_READ:
{
x.clear();
while (number-- > 0)
{
T it = T();
Do(it);
x.insert(it);
}
}
break;
case MODE_WRITE:
case MODE_MEASURE:
case MODE_VERIFY:
{
typename std::set<T>::iterator itr = x.begin();
while (number-- > 0)
Do(*itr++);
}
break;
default:
ERROR_LOG(COMMON, "Savestate error: invalid mode %d.", mode);
}
}
// Store strings.
void Do(std::string &x)
{
int stringLen = (int)x.length() + 1;
Do(stringLen);
switch (mode) {
case MODE_READ: x = (char*)*ptr; break;
case MODE_WRITE: memcpy(*ptr, x.c_str(), stringLen); break;
case MODE_MEASURE: break;
case MODE_VERIFY: _dbg_assert_msg_(COMMON, !strcmp(x.c_str(), (char*)*ptr), "Savestate verification failure: \"%s\" != \"%s\" (at %p).\n", x.c_str(), (char*)*ptr, ptr); break;
}
(*ptr) += stringLen;
}
void Do(std::wstring &x)
{
int stringLen = sizeof(wchar_t)*((int)x.length() + 1);
Do(stringLen);
switch (mode) {
case MODE_READ: x = (wchar_t*)*ptr; break;
case MODE_WRITE: memcpy(*ptr, x.c_str(), stringLen); break;
case MODE_MEASURE: break;
case MODE_VERIFY: _dbg_assert_msg_(COMMON, x == (wchar_t*)*ptr, "Savestate verification failure: \"%ls\" != \"%ls\" (at %p).\n", x.c_str(), (wchar_t*)*ptr, ptr); break;
}
(*ptr) += stringLen;
}
template<class T>
void DoClass(T &x) {
x.DoState(*this);
}
template<class T>
void DoClass(T *&x) {
if (mode == MODE_READ)
{
if (x != NULL)
delete x;
x = new T();
}
x->DoState(*this);
}
template<class T>
void DoArray(T *x, int count) {
DoHelper<T>::DoArray(this, x, count);
}
template<class T>
void Do(T &x) {
DoHelper<T>::Do(this, x);
}
template<class T>
void DoPOD(T &x) {
DoHelper<T>::Do(this, x);
}
template<class T>
void DoPointer(T* &x, T*const base) {
// pointers can be more than 2^31 apart, but you're using this function wrong if you need that much range
s32 offset = x - base;
Do(offset);
if (mode == MODE_READ)
x = base + offset;
}
template<class T, LinkedListItem<T>* (*TNew)(), void (*TFree)(LinkedListItem<T>*), void (*TDo)(PointerWrap&, T*)>
void DoLinkedList(LinkedListItem<T>*& list_start, LinkedListItem<T>** list_end=0)
{
LinkedListItem<T>* list_cur = list_start;
LinkedListItem<T>* prev = 0;
while (true)
{
u8 shouldExist = (list_cur ? 1 : 0);
Do(shouldExist);
if (shouldExist == 1)
{
LinkedListItem<T>* cur = list_cur ? list_cur : TNew();
TDo(*this, (T*)cur);
if (!list_cur)
{
if (mode == MODE_READ)
{
cur->next = 0;
list_cur = cur;
if (prev)
prev->next = cur;
else
list_start = cur;
}
else
{
TFree(cur);
continue;
}
}
}
else
{
if (mode == MODE_READ)
{
if (prev)
prev->next = 0;
if (list_end)
*list_end = prev;
if (list_cur)
{
if (list_start == list_cur)
list_start = 0;
do
{
LinkedListItem<T>* next = list_cur->next;
TFree(list_cur);
list_cur = next;
}
while (list_cur);
}
}
break;
}
prev = list_cur;
list_cur = list_cur->next;
}
}
void DoMarker(const char* prevName, u32 arbitraryNumber=0x42)
{
u32 cookie = arbitraryNumber;
Do(cookie);
if(mode == PointerWrap::MODE_READ && cookie != arbitraryNumber)
{
PanicAlertT("Error: After \"%s\", found %d (0x%X) instead of save marker %d (0x%X). Aborting savestate load...", prevName, cookie, cookie, arbitraryNumber, arbitraryNumber);
SetError(ERROR_FAILURE);
}
}
};
inline PointerWrapSection::~PointerWrapSection() {
if (ver_ > 0) {
p_.DoMarker(title_);
}
}
/*class CChunkFileReader
{
public:
enum Error {
ERROR_NONE,
ERROR_BAD_FILE,
ERROR_BROKEN_STATE,
};
// Load file template
template<class T>
static Error Load(const std::string& _rFilename, int _Revision, const char *_VersionString, T& _class, std::string* _failureReason)
{
INFO_LOG(COMMON, "ChunkReader: Loading %s" , _rFilename.c_str());
_failureReason->clear();
_failureReason->append("LoadStateWrongVersion");
if (!File::Exists(_rFilename)) {
_failureReason->clear();
_failureReason->append("LoadStateDoesntExist");
ERROR_LOG(COMMON, "ChunkReader: File doesn't exist");
return ERROR_BAD_FILE;
}
// Check file size
const u64 fileSize = File::GetSize(_rFilename);
static const u64 headerSize = sizeof(SChunkHeader);
if (fileSize < headerSize)
{
ERROR_LOG(COMMON,"ChunkReader: File too small");
return ERROR_BAD_FILE;
}
File::IOFile pFile(_rFilename, "rb");
if (!pFile)
{
ERROR_LOG(COMMON,"ChunkReader: Can't open file for reading");
return ERROR_BAD_FILE;
}
// read the header
SChunkHeader header;
if (!pFile.ReadArray(&header, 1))
{
ERROR_LOG(COMMON,"ChunkReader: Bad header size");
return ERROR_BAD_FILE;
}
// Check revision
if (header.Revision != _Revision)
{
ERROR_LOG(COMMON,"ChunkReader: Wrong file revision, got %d expected %d",
header.Revision, _Revision);
return ERROR_BAD_FILE;
}
if (strcmp(header.GitVersion, _VersionString) != 0)
{
WARN_LOG(COMMON, "This savestate was generated by a different version of PPSSPP, %s. It may not load properly.",
header.GitVersion);
}
// get size
const int sz = (int)(fileSize - headerSize);
if (header.ExpectedSize != sz)
{
ERROR_LOG(COMMON,"ChunkReader: Bad file size, got %d expected %d",
sz, header.ExpectedSize);
return ERROR_BAD_FILE;
}
// read the state
u8* buffer = new u8[sz];
if (!pFile.ReadBytes(buffer, sz))
{
ERROR_LOG(COMMON,"ChunkReader: Error reading file");
return ERROR_BAD_FILE;
}
u8 *ptr = buffer;
u8 *buf = buffer;
if (header.Compress) {
u8 *uncomp_buffer = new u8[header.UncompressedSize];
size_t uncomp_size = header.UncompressedSize;
snappy_uncompress((const char *)buffer, sz, (char *)uncomp_buffer, &uncomp_size);
if ((int)uncomp_size != header.UncompressedSize) {
ERROR_LOG(COMMON,"Size mismatch: file: %i calc: %i", (int)header.UncompressedSize, (int)uncomp_size);
}
ptr = uncomp_buffer;
buf = uncomp_buffer;
delete [] buffer;
}
PointerWrap p(&ptr, PointerWrap::MODE_READ);
_class.DoState(p);
delete[] buf;
INFO_LOG(COMMON, "ChunkReader: Done loading %s" , _rFilename.c_str());
if (p.error != p.ERROR_FAILURE) {
return ERROR_NONE;
} else {
return ERROR_BROKEN_STATE;
}
}
// Save file template
template<class T>
static Error Save(const std::string& _rFilename, int _Revision, const char *_VersionString, T& _class)
{
INFO_LOG(COMMON, "ChunkReader: Writing %s" , _rFilename.c_str());
File::IOFile pFile(_rFilename, "wb");
if (!pFile)
{
ERROR_LOG(COMMON,"ChunkReader: Error opening file for write");
return ERROR_BAD_FILE;
}
bool compress = true;
// Get data
u8 *ptr = 0;
PointerWrap p(&ptr, PointerWrap::MODE_MEASURE);
_class.DoState(p);
size_t const sz = (size_t)ptr;
u8 * buffer = new u8[sz];
ptr = &buffer[0];
p.SetMode(PointerWrap::MODE_WRITE);
_class.DoState(p);
// Create header
SChunkHeader header;
header.Compress = compress ? 1 : 0;
header.Revision = _Revision;
header.ExpectedSize = (int)sz;
header.UncompressedSize = (int)sz;
strncpy(header.GitVersion, _VersionString, 32);
header.GitVersion[31] = '\0';
// Write to file
if (compress) {
size_t comp_len = snappy_max_compressed_length(sz);
u8 *compressed_buffer = new u8[comp_len];
snappy_compress((const char *)buffer, sz, (char *)compressed_buffer, &comp_len);
delete [] buffer;
header.ExpectedSize = (int)comp_len;
if (!pFile.WriteArray(&header, 1))
{
ERROR_LOG(COMMON,"ChunkReader: Failed writing header");
return ERROR_BAD_FILE;
}
if (!pFile.WriteBytes(&compressed_buffer[0], comp_len)) {
ERROR_LOG(COMMON,"ChunkReader: Failed writing compressed data");
return ERROR_BAD_FILE;
} else {
INFO_LOG(COMMON, "Savestate: Compressed %i bytes into %i", (int)sz, (int)comp_len);
}
delete [] compressed_buffer;
} else {
if (!pFile.WriteArray(&header, 1))
{
ERROR_LOG(COMMON,"ChunkReader: Failed writing header");
return ERROR_BAD_FILE;
}
if (!pFile.WriteBytes(&buffer[0], sz))
{
ERROR_LOG(COMMON,"ChunkReader: Failed writing data");
return ERROR_BAD_FILE;
}
delete [] buffer;
}
INFO_LOG(COMMON,"ChunkReader: Done writing %s",
_rFilename.c_str());
if (p.error != p.ERROR_FAILURE) {
return ERROR_NONE;
} else {
return ERROR_BROKEN_STATE;
}
}
template <class T>
static Error Verify(T& _class)
{
u8 *ptr = 0;
// Step 1: Measure the space required.
PointerWrap p(&ptr, PointerWrap::MODE_MEASURE);
_class.DoState(p);
size_t const sz = (size_t)ptr;
std::vector<u8> buffer(sz);
// Step 2: Dump the state.
ptr = &buffer[0];
p.SetMode(PointerWrap::MODE_WRITE);
_class.DoState(p);
// Step 3: Verify the state.
ptr = &buffer[0];
p.SetMode(PointerWrap::MODE_VERIFY);
_class.DoState(p);
return ERROR_NONE;
}
private:
struct SChunkHeader
{
int Revision;
int Compress;
int ExpectedSize;
int UncompressedSize;
char GitVersion[32];
};
}; */
#endif // _POINTERWRAP_H_
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