mirror of
https://github.com/hrydgard/ppsspp.git
synced 2024-11-27 15:30:35 +00:00
753 lines
16 KiB
C++
753 lines
16 KiB
C++
// Copyright (C) 2003 Dolphin Project.
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, version 2.0 or later versions.
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License 2.0 for more details.
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// A copy of the GPL 2.0 should have been included with the program.
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// If not, see http://www.gnu.org/licenses/
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// Official SVN repository and contact information can be found at
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// http://code.google.com/p/dolphin-emu/
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#ifndef _POINTERWRAP_H_
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#define _POINTERWRAP_H_
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// Extremely simple serialization framework.
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// (mis)-features:
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// + Super fast
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// + Very simple
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// + Same code is used for serialization and deserializaition (in most cases)
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// - Zero backwards/forwards compatibility
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// - Serialization code for anything complex has to be manually written.
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#include <map>
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#include <vector>
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#include <deque>
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#include <string>
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#include <list>
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#include <set>
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#ifndef __SYMBIAN32__
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#ifdef IOS
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#include <tr1/type_traits>
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#else
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#include <type_traits>
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#endif
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#endif
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#include "Common.h"
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#include "FileUtil.h"
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#include "../ext/snappy/snappy-c.h"
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#if defined(ANDROID) || defined(IOS)
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namespace std {
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using tr1::is_pointer;
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}
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#endif
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#ifdef __SYMBIAN32__
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namespace std {
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template <bool bool_value>
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struct bool_constant {
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typedef bool_constant<bool_value> type;
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static const bool value = bool_value;
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};
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template <bool bool_value> const bool bool_constant<bool_value>::value;
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template <typename T> struct is_pointer : public bool_constant<false> {};
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template <typename T> struct is_pointer<T*> : public bool_constant<true> {};
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}
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#endif
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template <class T>
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struct LinkedListItem : public T
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{
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LinkedListItem<T> *next;
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};
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// Wrapper class
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class PointerWrap
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{
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// This makes it a compile error if you forget to define DoState() on non-POD.
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// Which also can be a problem, for example struct tm is non-POD on linux, for whatever reason...
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#ifdef _MSC_VER
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template<typename T, bool isPOD = std::is_pod<T>::value, bool isPointer = std::is_pointer<T>::value>
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#else
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template<typename T, bool isPOD = __is_pod(T), bool isPointer = std::is_pointer<T>::value>
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#endif
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struct DoHelper
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{
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static void DoArray(PointerWrap *p, T *x, int count)
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{
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for (int i = 0; i < count; ++i)
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p->DoClass(x[i]);
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}
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static void Do(PointerWrap *p, T &x)
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{
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p->DoClass(x);
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}
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};
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template<typename T>
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struct DoHelper<T, true, false>
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{
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static void DoArray(PointerWrap *p, T *x, int count)
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{
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p->DoVoid((void *)x, sizeof(T) * count);
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}
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static void Do(PointerWrap *p, T &x)
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{
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p->DoVoid((void *)&x, sizeof(x));
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}
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};
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public:
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enum Mode {
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MODE_READ = 1, // load
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MODE_WRITE, // save
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MODE_MEASURE, // calculate size
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MODE_VERIFY, // compare
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};
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u8 **ptr;
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Mode mode;
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public:
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PointerWrap(u8 **ptr_, Mode mode_) : ptr(ptr_), mode(mode_) {}
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PointerWrap(unsigned char **ptr_, int mode_) : ptr((u8**)ptr_), mode((Mode)mode_) {}
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void SetMode(Mode mode_) {mode = mode_;}
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Mode GetMode() const {return mode;}
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u8 **GetPPtr() {return ptr;}
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void DoVoid(void *data, int size)
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{
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switch (mode) {
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case MODE_READ: memcpy(data, *ptr, size); break;
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case MODE_WRITE: memcpy(*ptr, data, size); break;
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case MODE_MEASURE: break; // MODE_MEASURE - don't need to do anything
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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;
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default: break; // throw an error?
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}
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(*ptr) += size;
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}
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template<class K, class T>
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void Do(std::map<K, T *> &x)
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{
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if (mode == MODE_READ)
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{
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for (auto it = x.begin(), end = x.end(); it != end; ++it)
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{
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if (it->second != NULL)
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delete it->second;
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}
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}
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T *dv = NULL;
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DoMap(x, dv);
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}
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template<class K, class T>
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void Do(std::map<K, T> &x)
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{
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T dv;
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DoMap(x, dv);
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}
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template<class K, class T>
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void DoMap(std::map<K, T> &x, T &default_val)
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{
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unsigned int number = (unsigned int)x.size();
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Do(number);
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switch (mode) {
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case MODE_READ:
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{
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x.clear();
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while (number > 0)
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{
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K first = 0;
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Do(first);
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T second = default_val;
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Do(second);
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x[first] = second;
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--number;
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}
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}
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break;
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case MODE_WRITE:
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case MODE_MEASURE:
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case MODE_VERIFY:
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{
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typename std::map<K, T>::iterator itr = x.begin();
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while (number > 0)
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{
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Do(itr->first);
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Do(itr->second);
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--number;
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++itr;
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}
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}
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break;
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}
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}
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template<class K, class T>
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void Do(std::multimap<K, T *> &x)
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{
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if (mode == MODE_READ)
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{
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for (auto it = x.begin(), end = x.end(); it != end; ++it)
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{
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if (it->second != NULL)
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delete it->second;
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}
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}
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T *dv = NULL;
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DoMultimap(x, dv);
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}
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template<class K, class T>
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void Do(std::multimap<K, T> &x)
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{
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T dv;
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DoMultimap(x, dv);
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}
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template<class K, class T>
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void DoMultimap(std::multimap<K, T> &x, T &default_val)
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{
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unsigned int number = (unsigned int)x.size();
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Do(number);
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switch (mode) {
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case MODE_READ:
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{
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x.clear();
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while (number > 0)
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{
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K first;
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Do(first);
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T second = default_val;
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Do(second);
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x.insert(std::make_pair(first, second));
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--number;
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}
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}
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break;
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case MODE_WRITE:
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case MODE_MEASURE:
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case MODE_VERIFY:
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{
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typename std::multimap<K, T>::iterator itr = x.begin();
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while (number > 0)
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{
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Do(itr->first);
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Do(itr->second);
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--number;
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++itr;
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}
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}
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break;
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}
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}
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// Store vectors.
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template<class T>
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void Do(std::vector<T *> &x)
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{
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T *dv = NULL;
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DoVector(x, dv);
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}
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template<class T>
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void Do(std::vector<T> &x)
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{
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T dv;
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DoVector(x, dv);
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}
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template<class T>
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void DoPOD(std::vector<T> &x)
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{
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T dv;
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DoVectorPOD(x, dv);
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}
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template<class T>
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void Do(std::vector<T> &x, T &default_val)
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{
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DoVector(x, default_val);
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}
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template<class T>
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void DoVector(std::vector<T> &x, T &default_val)
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{
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u32 vec_size = (u32)x.size();
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Do(vec_size);
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x.resize(vec_size, default_val);
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if (vec_size > 0)
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DoArray(&x[0], vec_size);
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}
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template<class T>
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void DoVectorPOD(std::vector<T> &x, T &default_val)
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{
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u32 vec_size = (u32)x.size();
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Do(vec_size);
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x.resize(vec_size, default_val);
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if (vec_size > 0)
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DoArray(&x[0], vec_size);
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}
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// Store deques.
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template<class T>
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void Do(std::deque<T *> &x)
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{
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T *dv = NULL;
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DoDeque(x, dv);
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}
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template<class T>
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void Do(std::deque<T> &x)
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{
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T dv;
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DoDeque(x, dv);
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}
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template<class T>
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void DoDeque(std::deque<T> &x, T &default_val)
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{
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u32 deq_size = (u32)x.size();
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Do(deq_size);
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x.resize(deq_size, default_val);
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u32 i;
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for(i = 0; i < deq_size; i++)
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Do(x[i]);
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}
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// Store STL lists.
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template<class T>
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void Do(std::list<T *> &x)
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{
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T *dv = NULL;
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Do(x, dv);
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}
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template<class T>
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void Do(std::list<T> &x)
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{
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T dv;
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DoList(x, dv);
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}
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template<class T>
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void Do(std::list<T> &x, T &default_val)
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{
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DoList(x, default_val);
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}
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template<class T>
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void DoList(std::list<T> &x, T &default_val)
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{
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u32 list_size = (u32)x.size();
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Do(list_size);
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x.resize(list_size, default_val);
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typename std::list<T>::iterator itr, end;
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for (itr = x.begin(), end = x.end(); itr != end; ++itr)
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Do(*itr);
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}
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// Store STL sets.
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template <class T>
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void Do(std::set<T *> &x)
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{
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if (mode == MODE_READ)
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{
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for (auto it = x.begin(), end = x.end(); it != end; ++it)
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{
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if (*it != NULL)
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delete *it;
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}
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}
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DoSet(x);
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}
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template <class T>
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void Do(std::set<T> &x)
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{
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DoSet(x);
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}
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template <class T>
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void DoSet(std::set<T> &x)
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{
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unsigned int number = (unsigned int)x.size();
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Do(number);
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switch (mode)
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{
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case MODE_READ:
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{
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x.clear();
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while (number-- > 0)
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{
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T it;
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Do(it);
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x.insert(it);
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}
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}
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break;
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case MODE_WRITE:
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case MODE_MEASURE:
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case MODE_VERIFY:
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{
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typename std::set<T>::iterator itr = x.begin();
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while (number-- > 0)
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Do(*itr++);
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}
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break;
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default:
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ERROR_LOG(COMMON, "Savestate error: invalid mode %d.", mode);
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}
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}
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// Store strings.
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void Do(std::string &x)
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{
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int stringLen = (int)x.length() + 1;
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Do(stringLen);
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switch (mode) {
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case MODE_READ: x = (char*)*ptr; break;
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case MODE_WRITE: memcpy(*ptr, x.c_str(), stringLen); break;
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case MODE_MEASURE: break;
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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;
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}
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(*ptr) += stringLen;
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}
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void Do(std::wstring &x)
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{
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int stringLen = sizeof(wchar_t)*((int)x.length() + 1);
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Do(stringLen);
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switch (mode) {
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case MODE_READ: x = (wchar_t*)*ptr; break;
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case MODE_WRITE: memcpy(*ptr, x.c_str(), stringLen); break;
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case MODE_MEASURE: break;
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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;
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}
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(*ptr) += stringLen;
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}
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template<class T>
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void DoClass(T &x) {
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x.DoState(*this);
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}
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template<class T>
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void DoClass(T *&x) {
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if (mode == MODE_READ)
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{
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if (x != NULL)
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delete x;
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x = new T();
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}
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x->DoState(*this);
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}
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template<class T>
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void DoArray(T *x, int count) {
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DoHelper<T>::DoArray(this, x, count);
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}
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template<class T>
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void Do(T &x) {
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DoHelper<T>::Do(this, x);
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}
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template<class T>
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void DoPOD(T &x) {
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DoHelper<T>::Do(this, x);
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}
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template<class T>
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void DoPointer(T* &x, T*const base) {
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// pointers can be more than 2^31 apart, but you're using this function wrong if you need that much range
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s32 offset = x - base;
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Do(offset);
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if (mode == MODE_READ)
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x = base + offset;
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}
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template<class T, LinkedListItem<T>* (*TNew)(), void (*TFree)(LinkedListItem<T>*), void (*TDo)(PointerWrap&, T*)>
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void DoLinkedList(LinkedListItem<T>*& list_start, LinkedListItem<T>** list_end=0)
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{
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LinkedListItem<T>* list_cur = list_start;
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LinkedListItem<T>* prev = 0;
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while (true)
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{
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u8 shouldExist = (list_cur ? 1 : 0);
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Do(shouldExist);
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if (shouldExist == 1)
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{
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LinkedListItem<T>* cur = list_cur ? list_cur : TNew();
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TDo(*this, (T*)cur);
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if (!list_cur)
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{
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if (mode == MODE_READ)
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{
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cur->next = 0;
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list_cur = cur;
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if (prev)
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prev->next = cur;
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else
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list_start = cur;
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}
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else
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{
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TFree(cur);
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continue;
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}
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}
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}
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else
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{
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if (mode == MODE_READ)
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{
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if (prev)
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prev->next = 0;
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if (list_end)
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*list_end = prev;
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if (list_cur)
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{
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if (list_start == list_cur)
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list_start = 0;
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do
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{
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LinkedListItem<T>* next = list_cur->next;
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TFree(list_cur);
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list_cur = next;
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}
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while (list_cur);
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}
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}
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break;
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}
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prev = list_cur;
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list_cur = list_cur->next;
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}
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}
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void DoMarker(const char* prevName, u32 arbitraryNumber=0x42)
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{
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u32 cookie = arbitraryNumber;
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Do(cookie);
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if(mode == PointerWrap::MODE_READ && cookie != arbitraryNumber)
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{
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PanicAlertT("Error: After \"%s\", found %d (0x%X) instead of save marker %d (0x%X). Aborting savestate load...", prevName, cookie, cookie, arbitraryNumber, arbitraryNumber);
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mode = PointerWrap::MODE_MEASURE;
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}
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}
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};
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class CChunkFileReader
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{
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public:
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// Load file template
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template<class T>
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static bool Load(const std::string& _rFilename, int _Revision, T& _class)
|
|
{
|
|
INFO_LOG(COMMON, "ChunkReader: Loading %s" , _rFilename.c_str());
|
|
|
|
if (!File::Exists(_rFilename))
|
|
return false;
|
|
|
|
// 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 false;
|
|
}
|
|
|
|
File::IOFile pFile(_rFilename, "rb");
|
|
if (!pFile)
|
|
{
|
|
ERROR_LOG(COMMON,"ChunkReader: Can't open file for reading");
|
|
return false;
|
|
}
|
|
|
|
// read the header
|
|
SChunkHeader header;
|
|
if (!pFile.ReadArray(&header, 1))
|
|
{
|
|
ERROR_LOG(COMMON,"ChunkReader: Bad header size");
|
|
return false;
|
|
}
|
|
|
|
// Check revision
|
|
if (header.Revision != _Revision)
|
|
{
|
|
ERROR_LOG(COMMON,"ChunkReader: Wrong file revision, got %d expected %d",
|
|
header.Revision, _Revision);
|
|
return false;
|
|
}
|
|
|
|
// 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 false;
|
|
}
|
|
|
|
// read the state
|
|
u8* buffer = new u8[sz];
|
|
if (!pFile.ReadBytes(buffer, sz))
|
|
{
|
|
ERROR_LOG(COMMON,"ChunkReader: Error reading file");
|
|
return false;
|
|
}
|
|
|
|
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());
|
|
return true;
|
|
}
|
|
|
|
// Save file template
|
|
template<class T>
|
|
static bool Save(const std::string& _rFilename, int _Revision, 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 false;
|
|
}
|
|
|
|
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;
|
|
|
|
// 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 false;
|
|
}
|
|
if (!pFile.WriteBytes(&compressed_buffer[0], comp_len)) {
|
|
ERROR_LOG(COMMON,"ChunkReader: Failed writing compressed data");
|
|
return false;
|
|
} 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 false;
|
|
}
|
|
if (!pFile.WriteBytes(&buffer[0], sz))
|
|
{
|
|
ERROR_LOG(COMMON,"ChunkReader: Failed writing data");
|
|
return false;
|
|
}
|
|
delete [] buffer;
|
|
}
|
|
|
|
INFO_LOG(COMMON,"ChunkReader: Done writing %s",
|
|
_rFilename.c_str());
|
|
return true;
|
|
}
|
|
|
|
template <class T>
|
|
static bool 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 true;
|
|
}
|
|
|
|
private:
|
|
struct SChunkHeader
|
|
{
|
|
int Revision;
|
|
int Compress;
|
|
int ExpectedSize;
|
|
int UncompressedSize;
|
|
};
|
|
};
|
|
|
|
#endif // _POINTERWRAP_H_
|