summaryrefslogtreecommitdiffstats
path: root/src/common/chunk_file.h
blob: dc8ac1fd98382480cabfba30883fb2fe33e2d632 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
// 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/

#pragma once

// 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>
#include <type_traits>

#include "common/common.h"
#include "common/file_util.h"

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_);
    }
}