core.hpp 181 KB
Newer Older
Gauthier Quesnel's avatar
Gauthier Quesnel committed
1
2
3
4
5
6
7
8
9
// Copyright (c) 2020 INRA Distributed under the Boost Software License,
// Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt)

#ifndef ORG_VLEPROJECT_IRRITATOR_2020
#define ORG_VLEPROJECT_IRRITATOR_2020

#include <algorithm>
#include <limits>
Gauthier Quesnel's avatar
Gauthier Quesnel committed
10
11
12

#ifdef __has_include
#if __has_include(<numbers>)
Gauthier Quesnel's avatar
Gauthier Quesnel committed
13
#include <numbers>
Gauthier Quesnel's avatar
Gauthier Quesnel committed
14
15
16
17
18
19
#define irt_have_numbers 1
#else
#define irt_have_numbers 0
#endif
#endif

Gauthier Quesnel's avatar
Gauthier Quesnel committed
20
21
22
23
24
#include <string_view>

#include <cmath>
#include <cstdint>
#include <cstring>
K-H-Ismail's avatar
K-H-Ismail committed
25

26
27
28
29
30
31
/*****************************************************************************
 *
 * Helper macros
 *
 ****************************************************************************/

32
33
34
35
36
#ifndef irt_assert
#include <cassert>
#define irt_assert(_expr) assert(_expr)
#endif

37
38
39
40
41
42
namespace irt {

static inline bool is_fatal_breakpoint = true;

}

43
44
45
46
47
#ifndef NDEBUG
#if (defined(__i386__) || defined(__x86_64__)) && defined(__GNUC__) &&         \
  __GNUC__ >= 2
#define irt_breakpoint()                                                       \
    do {                                                                       \
48
49
        if (::irt::is_fatal_breakpoint)                                        \
            __asm__ __volatile__("int $03");                                   \
50
51
52
53
    } while (0)
#elif (defined(_MSC_VER) || defined(__DMC__)) && defined(_M_IX86)
#define irt_breakpoint()                                                       \
    do {                                                                       \
54
55
        if (::irt::is_fatal_breakpoint)                                        \
            __asm int 3h                                                       \
56
57
58
59
    } while (0)
#elif defined(_MSC_VER)
#define irt_breakpoint()                                                       \
    do {                                                                       \
60
61
        if (::irt::is_fatal_breakpoint)                                        \
            __debugbreak();                                                    \
62
63
64
65
66
    } while (0)
#elif defined(__alpha__) && !defined(__osf__) && defined(__GNUC__) &&          \
  __GNUC__ >= 2
#define irt_breakpoint()                                                       \
    do {                                                                       \
67
68
        if (::irt::is_fatal_breakpoint)                                        \
            __asm__ __volatile__("bpt");                                       \
69
70
71
72
    } while (0)
#elif defined(__APPLE__)
#define irt_breakpoint()                                                       \
    do {                                                                       \
73
74
        if (::irt::is_fatal_breakpoint)                                        \
            __builtin_trap();                                                  \
75
76
77
78
    } while (0)
#else /* !__i386__ && !__alpha__ */
#define irt_breakpoint()                                                       \
    do {                                                                       \
79
80
        if (::irt::is_fatal_breakpoint)                                        \
            raise(SIGTRAP);                                                    \
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
    } while (0)
#endif /* __i386__ */
#else
#define irt_breakpoint()                                                       \
    do {                                                                       \
    } while (0)
#endif

#define irt_bad_return(status__)                                               \
    do {                                                                       \
        irt_breakpoint();                                                      \
        return status__;                                                       \
    } while (0)

#define irt_return_if_bad(expr__)                                              \
    do {                                                                       \
        auto status__ = (expr__);                                              \
        if (status__ != status::success) {                                     \
            irt_breakpoint();                                                  \
            return status__;                                                   \
        }                                                                      \
    } while (0)

#define irt_return_if_fail(expr__, status__)                                   \
    do {                                                                       \
        if (!(expr__)) {                                                       \
            irt_breakpoint();                                                  \
            return status__;                                                   \
        }                                                                      \
    } while (0)

112
113
114
115
116
117
118
119
#if defined(__GNUC__)
#define irt_unreachable() __builtin_unreachable();
#elif defined(_MSC_VER)
#define irt_unreachable() __assume(0)
#else
#define irt_unreachable()
#endif

Gauthier Quesnel's avatar
Gauthier Quesnel committed
120
121
122
123
124
125
126
127
128
129
130
131
namespace irt {

using i8 = int8_t;
using i16 = int16_t;
using i32 = int32_t;
using i64 = int64_t;
using u8 = uint8_t;
using u16 = uint16_t;
using u32 = uint32_t;
using u64 = uint64_t;
using sz = size_t;

132
133
134
135
136
137
138
139
template<typename Integer>
constexpr typename std::make_unsigned<Integer>::type
to_unsigned(Integer value)
{
    irt_assert(value >= 0);
    return static_cast<typename std::make_unsigned<Integer>::type>(value);
}

Gauthier Quesnel's avatar
Gauthier Quesnel committed
140
141
142
143
144
145
146
147
148
/*****************************************************************************
 *
 * Return status of many function
 *
 ****************************************************************************/

enum class status
{
    success,
Gauthier Quesnel's avatar
Gauthier Quesnel committed
149
    unknown_dynamics,
Gauthier Quesnel's avatar
Gauthier Quesnel committed
150
151
152
153
154
155
156
157
158
159
    block_allocator_bad_capacity,
    block_allocator_not_enough_memory,
    head_allocator_bad_capacity,
    head_allocator_not_enough_memory,
    simulation_not_enough_model,
    simulation_not_enough_memory_message_list_allocator,
    simulation_not_enough_memory_input_port_list_allocator,
    simulation_not_enough_memory_output_port_list_allocator,
    data_array_init_capacity_error,
    data_array_not_enough_memory,
160
161
    data_array_archive_init_capacity_error,
    data_array_archive_not_enough_memory,
162
163
164
    array_init_capacity_zero,
    array_init_capacity_too_big,
    array_init_not_enough_memory,
165
166
167
    vector_init_capacity_zero,
    vector_init_capacity_too_big,
    vector_init_not_enough_memory,
Gauthier Quesnel's avatar
Gauthier Quesnel committed
168
169
170
    dynamics_unknown_id,
    dynamics_unknown_port_id,
    dynamics_not_enough_memory,
Gauthier Quesnel's avatar
Gauthier Quesnel committed
171
172
173
    model_connect_output_port_unknown,
    model_connect_input_port_unknown,
    model_connect_already_exist,
174
    model_connect_bad_dynamics,
Gauthier Quesnel's avatar
Gauthier Quesnel committed
175
176
    model_integrator_dq_error,
    model_integrator_X_error,
Gauthier Quesnel's avatar
Gauthier Quesnel committed
177
178
179
180
181
182
183
184
    model_integrator_internal_error,
    model_integrator_output_error,
    model_integrator_running_without_x_dot,
    model_integrator_ta_with_bad_x_dot,
    model_quantifier_bad_quantum_parameter,
    model_quantifier_bad_archive_length_parameter,
    model_quantifier_shifting_value_neg,
    model_quantifier_shifting_value_less_1,
K-H-Ismail's avatar
K-H-Ismail committed
185
    model_time_func_bad_init_message,
186
187
    model_flow_bad_samplerate,
    model_flow_bad_data,
188
    gui_not_enough_memory,
189
    io_not_enough_memory,
Gauthier Quesnel's avatar
Gauthier Quesnel committed
190
191
192
193
194
195
196
    io_file_format_error,
    io_file_format_model_error,
    io_file_format_model_number_error,
    io_file_format_model_unknown,
    io_file_format_dynamics_unknown,
    io_file_format_dynamics_limit_reach,
    io_file_format_dynamics_init_error
Gauthier Quesnel's avatar
Gauthier Quesnel committed
197
198
};

199
200
201
202
203
204
205
constexpr i8
status_last() noexcept
{
    return static_cast<i8>(status::io_file_format_dynamics_init_error);
}

constexpr sz
206
207
status_size() noexcept
{
208
    return static_cast<sz>(status_last() + static_cast<i8>(1));
209
210
}

Gauthier Quesnel's avatar
Gauthier Quesnel committed
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
constexpr bool
is_success(status s) noexcept
{
    return s == status::success;
}

constexpr bool
is_bad(status s) noexcept
{
    return s != status::success;
}

template<typename... Args>
constexpr bool
is_status_equal(status s, Args... args) noexcept
{
    return ((s == args) || ... || false);
}

230
231
232
233
234
235
236
237
238
inline status
check_return(status s) noexcept
{
    if (s != status::success)
        irt_breakpoint();

    return s;
}

239
240
template<typename T, typename... Args>
constexpr bool
241
match(const T& s, Args... args) noexcept
242
243
244
245
{
    return ((s == args) || ... || false);
}

246
247
248
template<class T, class... Rest>
constexpr bool
are_all_same() noexcept
Gauthier Quesnel's avatar
Gauthier Quesnel committed
249
{
250
    return (std::is_same_v<T, Rest> && ...);
Gauthier Quesnel's avatar
Gauthier Quesnel committed
251
252
}

Gauthier Quesnel's avatar
Gauthier Quesnel committed
253
254
255
256
257
258
259
260
261
template<class T>
typename std::enable_if<!std::numeric_limits<T>::is_integer, bool>::type
almost_equal(T x, T y, int ulp)
{
    return std::fabs(x - y) <=
             std::numeric_limits<T>::epsilon() * std::fabs(x + y) * ulp ||
           std::fabs(x - y) < std::numeric_limits<T>::min();
}

Gauthier Quesnel's avatar
Gauthier Quesnel committed
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
/*****************************************************************************
 *
 * Definition of Time
 *
 * TODO:
 * - enable template definition of float or [float|double,bool absolute]
 *   representation of time?
 *
 ****************************************************************************/

using time = double;

template<typename T>
struct time_domain
{};

template<>
struct time_domain<time>
{
    using time_type = time;

    static constexpr const double infinity =
      std::numeric_limits<double>::infinity();
    static constexpr const double negative_infinity =
      -std::numeric_limits<double>::infinity();
    static constexpr const double zero = 0;

289
    static constexpr bool is_infinity(time t) noexcept
Gauthier Quesnel's avatar
Gauthier Quesnel committed
290
291
292
293
    {
        return t == infinity || t == negative_infinity;
    }

294
    static constexpr bool is_zero(time t) noexcept
Gauthier Quesnel's avatar
Gauthier Quesnel committed
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
    {
        return t == zero;
    }
};

/*****************************************************************************
 *
 * Small string
 *
 ****************************************************************************/

template<size_t length = 8>
class small_string
{
    char buffer_[length];
    u8 size_;

public:
Gauthier Quesnel's avatar
Gauthier Quesnel committed
313
314
    using iterator = char*;
    using const_iterator = const char*;
Gauthier Quesnel's avatar
Gauthier Quesnel committed
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
    using size_type = u8;

    static_assert(length > size_t{ 1 } && length < size_t{ 254 });

    constexpr small_string() noexcept
    {
        clear();
    }

    constexpr small_string(const small_string& str) noexcept
    {
        std::copy_n(str.buffer_, str.size_, buffer_);
        buffer_[str.size_] = '\0';
        size_ = str.size_;
    }

    constexpr small_string(small_string&& str) noexcept
    {
        std::copy_n(str.buffer_, str.size_, buffer_);
        buffer_[str.size_] = '\0';
        size_ = str.size_;
        str.clear();
    }

    constexpr small_string& operator=(const small_string& str) noexcept
    {
        if (&str != this) {
            std::copy_n(str.buffer_, str.size_, buffer_);
            buffer_[str.size_] = '\0';
            size_ = str.size_;
        }

        return *this;
    }

    constexpr small_string& operator=(small_string&& str) noexcept
    {
        if (&str != this) {
            std::copy_n(str.buffer_, str.size_, buffer_);
            buffer_[str.size_] = '\0';
            size_ = str.size_;
        }

        return *this;
    }

    constexpr small_string(const char* str) noexcept
    {
        std::strncpy(buffer_, str, length - 1);
        buffer_[length - 1] = '\0';
        size_ = static_cast<u8>(std::strlen(buffer_));
    }

    constexpr small_string(const std::string_view str) noexcept
    {
        assign(str);
    }

    constexpr bool empty() const noexcept
    {
        constexpr unsigned char zero{ 0 };

        return zero == size_;
    }

Gauthier Quesnel's avatar
Gauthier Quesnel committed
380
381
    constexpr void size(std::size_t sz) noexcept
    {
382
383
        size_ = static_cast<u8>(std::min(sz, length - 1));
        buffer_[size_] = '\0';
Gauthier Quesnel's avatar
Gauthier Quesnel committed
384
385
    }

Gauthier Quesnel's avatar
Gauthier Quesnel committed
386
387
388
389
390
391
392
    constexpr std::size_t size() const noexcept
    {
        return size_;
    }

    constexpr std::size_t capacity() const noexcept
    {
393
        return length;
Gauthier Quesnel's avatar
Gauthier Quesnel committed
394
395
396
397
    }

    constexpr void assign(const std::string_view str) noexcept
    {
398
        const size_t copy_length = std::min(str.size(), length - 1);
Gauthier Quesnel's avatar
Gauthier Quesnel committed
399
400

        std::memcpy(buffer_, str.data(), copy_length);
401
402
        buffer_[copy_length] = '\0';

403
        size_ = static_cast<u8>(copy_length);
Gauthier Quesnel's avatar
Gauthier Quesnel committed
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
    }

    constexpr std::string_view sv() const noexcept
    {
        return { buffer_, size_ };
    }

    constexpr void clear() noexcept
    {
        std::fill_n(buffer_, length, '\0');
        size_ = 0;
    }

    constexpr const char* c_str() const noexcept
    {
        return buffer_;
    }

Gauthier Quesnel's avatar
Gauthier Quesnel committed
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
    constexpr iterator begin() noexcept
    {
        return buffer_;
    }

    constexpr iterator end() noexcept
    {
        return buffer_ + size_;
    }

    constexpr const_iterator begin() const noexcept
    {
        return buffer_;
    }

    constexpr const_iterator end() const noexcept
    {
        return buffer_ + size_;
    }

Gauthier Quesnel's avatar
Gauthier Quesnel committed
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
    constexpr bool operator==(const small_string& rhs) const noexcept
    {
        return std::strncmp(buffer_, rhs.buffer_, length) == 0;
    }

    constexpr bool operator!=(const small_string& rhs) const noexcept
    {
        return std::strncmp(buffer_, rhs.buffer_, length) != 0;
    }

    constexpr bool operator>(const small_string& rhs) const noexcept
    {
        return std::strncmp(buffer_, rhs.buffer_, length) > 0;
    }

    constexpr bool operator<(const small_string& rhs) const noexcept
    {
        return std::strncmp(buffer_, rhs.buffer_, length) < 0;
    }

    constexpr bool operator==(const char* rhs) const noexcept
    {
        return std::strncmp(buffer_, rhs, length) == 0;
    }

    constexpr bool operator!=(const char* rhs) const noexcept
    {
        return std::strncmp(buffer_, rhs, length) != 0;
    }

    constexpr bool operator>(const char* rhs) const noexcept
    {
        return std::strncmp(buffer_, rhs, length) > 0;
    }

    constexpr bool operator<(const char* rhs) const noexcept
    {
        return std::strncmp(buffer_, rhs, length) < 0;
    }
};

/*****************************************************************************
 *
485
 * value
Gauthier Quesnel's avatar
Gauthier Quesnel committed
486
487
488
 *
 ****************************************************************************/

489
struct message
Gauthier Quesnel's avatar
Gauthier Quesnel committed
490
{
491
492
    using size_type = std::size_t;
    using difference_type = std::ptrdiff_t;
Gauthier Quesnel's avatar
Gauthier Quesnel committed
493

494
495
    double real[3];
    i8 length;
Gauthier Quesnel's avatar
Gauthier Quesnel committed
496

497
498
    constexpr std::size_t size() const noexcept
    {
499
        irt_assert(length >= 0);
500
        return static_cast<std::size_t>(length);
501
    }
Gauthier Quesnel's avatar
Gauthier Quesnel committed
502

503
    constexpr message() noexcept
504
      : real{ 0.0, 0.0, 0.0 }
505
506
      , length{ 0 }
    {}
Gauthier Quesnel's avatar
Gauthier Quesnel committed
507

508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
    constexpr message(const double v) noexcept
      : real{ v, 0., 0. }
      , length{ 1 }
    {}

    constexpr message(const double v1, const double v2) noexcept
      : real{ v1, v2, 0. }
      , length{ 2 }
    {}

    constexpr message(const double v1,
                      const double v2,
                      const double v3) noexcept
      : real{ v1, v2, v3 }
      , length{ 3 }
    {}
Gauthier Quesnel's avatar
Gauthier Quesnel committed
524

525
    double operator[](const difference_type i) const noexcept
526
    {
527
        return real[i];
Gauthier Quesnel's avatar
Gauthier Quesnel committed
528
    }
529

530
    double& operator[](const difference_type i) noexcept
531
    {
532
        return real[i];
533
    }
534
};
Gauthier Quesnel's avatar
Gauthier Quesnel committed
535

536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
/*****************************************************************************
 *
 * Flat list
 *
 ****************************************************************************/

template<typename T>
class block_allocator
{
public:
    static_assert(std::is_trivially_destructible_v<T>,
                  "block_allocator is only for POD object");

    using value_type = T;

    union block
Gauthier Quesnel's avatar
Gauthier Quesnel committed
552
    {
553
554
555
        block* next;
        typename std::aligned_storage<sizeof(T), alignof(T)>::type storage;
    };
Gauthier Quesnel's avatar
Gauthier Quesnel committed
556

557
private:
Gauthier Quesnel's avatar
Gauthier Quesnel committed
558
    block* blocks{ nullptr };    // contains all preallocated blocks
559
560
561
562
    block* free_head{ nullptr }; // a free list
    sz size{ 0 };                // number of active elements allocated
    sz max_size{ 0 }; // number of elements allocated (with free_head)
    sz capacity{ 0 }; // capacity of the allocator
Gauthier Quesnel's avatar
Gauthier Quesnel committed
563

564
565
public:
    block_allocator() = default;
Gauthier Quesnel's avatar
Gauthier Quesnel committed
566

567
568
    block_allocator(const block_allocator&) = delete;
    block_allocator& operator=(const block_allocator&) = delete;
Gauthier Quesnel's avatar
Gauthier Quesnel committed
569

570
571
572
573
    ~block_allocator() noexcept
    {
        if (blocks)
            std::free(blocks);
Gauthier Quesnel's avatar
Gauthier Quesnel committed
574
575
    }

576
    status init(std::size_t new_capacity) noexcept
Gauthier Quesnel's avatar
Gauthier Quesnel committed
577
    {
578
579
        if (new_capacity == 0)
            return status::block_allocator_bad_capacity;
Gauthier Quesnel's avatar
Gauthier Quesnel committed
580

581
582
583
584
585
586
587
588
        if (new_capacity != capacity) {
            if (blocks)
                std::free(blocks);
            blocks =
              static_cast<block*>(std::malloc(new_capacity * sizeof(block)));
            if (blocks == nullptr)
                return status::block_allocator_not_enough_memory;
        }
Gauthier Quesnel's avatar
Gauthier Quesnel committed
589

590
591
592
593
        size = 0;
        max_size = 0;
        capacity = new_capacity;
        free_head = nullptr;
Gauthier Quesnel's avatar
Gauthier Quesnel committed
594

595
        return status::success;
Gauthier Quesnel's avatar
Gauthier Quesnel committed
596
597
    }

598
    void reset() noexcept
Gauthier Quesnel's avatar
Gauthier Quesnel committed
599
    {
600
601
602
603
604
        if (capacity > 0) {
            size = 0;
            max_size = 0;
            free_head = nullptr;
        }
Gauthier Quesnel's avatar
Gauthier Quesnel committed
605
606
    }

607
    T* alloc() noexcept
Gauthier Quesnel's avatar
Gauthier Quesnel committed
608
    {
609
610
611
612
613
614
        block* new_block = nullptr;

        if (free_head != nullptr) {
            new_block = free_head;
            free_head = free_head->next;
        } else {
615
            irt_assert(max_size < capacity);
616
            new_block = reinterpret_cast<block*>(&blocks[max_size++]);
Gauthier Quesnel's avatar
Gauthier Quesnel committed
617
        }
618
        ++size;
Gauthier Quesnel's avatar
Gauthier Quesnel committed
619

620
        return reinterpret_cast<T*>(new_block);
Gauthier Quesnel's avatar
Gauthier Quesnel committed
621
622
    }

623
624
625
626
627
    bool can_alloc() noexcept
    {
        return free_head != nullptr || max_size < capacity;
    }

628
    void free(T* n) noexcept
Gauthier Quesnel's avatar
Gauthier Quesnel committed
629
    {
630
        irt_assert(n);
Gauthier Quesnel's avatar
Gauthier Quesnel committed
631

632
        block* ptr = reinterpret_cast<block*>(n);
Gauthier Quesnel's avatar
Gauthier Quesnel committed
633

634
635
        ptr->next = free_head;
        free_head = ptr;
Gauthier Quesnel's avatar
Gauthier Quesnel committed
636

637
        --size;
Gauthier Quesnel's avatar
Gauthier Quesnel committed
638

639
640
641
642
        if (size == 0) {         // A special part: if it no longer exists
            max_size = 0;        // we reset the free list and the number
            free_head = nullptr; // of elements allocated.
        }
Gauthier Quesnel's avatar
Gauthier Quesnel committed
643
    }
644
645
646
647
648

    bool can_alloc(size_t number) const noexcept
    {
        return number + size < capacity;
    }
649
};
Gauthier Quesnel's avatar
Gauthier Quesnel committed
650

651
652
653
654
655
template<typename T>
class flat_list
{
public:
    struct node_type
Gauthier Quesnel's avatar
Gauthier Quesnel committed
656
    {
657
658
659
        T value;
        node_type* next = nullptr;
    };
Gauthier Quesnel's avatar
Gauthier Quesnel committed
660

661
662
663
664
public:
    using allocator_type = block_allocator<node_type>;
    using value_type = T;
    using reference = T&;
665
    using const_reference = const T&;
666
    using pointer = T*;
Gauthier Quesnel's avatar
Gauthier Quesnel committed
667

668
    class iterator
Gauthier Quesnel's avatar
Gauthier Quesnel committed
669
    {
670
671
    private:
        node_type* node{ nullptr };
Gauthier Quesnel's avatar
Gauthier Quesnel committed
672

673
674
675
676
677
678
    public:
        using iterator_category = std::forward_iterator_tag;
        using value_type = T;
        using pointer = T*;
        using reference = T&;
        using difference_type = std::ptrdiff_t;
Gauthier Quesnel's avatar
Gauthier Quesnel committed
679

680
        iterator() noexcept = default;
Gauthier Quesnel's avatar
Gauthier Quesnel committed
681

682
683
684
        iterator(node_type* n) noexcept
          : node(n)
        {}
Gauthier Quesnel's avatar
Gauthier Quesnel committed
685

686
687
688
        iterator(const iterator& other) noexcept
          : node(other.node)
        {}
Gauthier Quesnel's avatar
Gauthier Quesnel committed
689

690
691
692
693
694
        iterator& operator=(const iterator& other) noexcept
        {
            node = other.node;
            return *this;
        }
Gauthier Quesnel's avatar
Gauthier Quesnel committed
695

696
697
698
699
        T& operator*() noexcept
        {
            return node->value;
        }
Gauthier Quesnel's avatar
Gauthier Quesnel committed
700

701
702
703
704
        T* operator->() noexcept
        {
            return &node->value;
        }
Gauthier Quesnel's avatar
Gauthier Quesnel committed
705

706
707
708
709
        iterator operator++() noexcept
        {
            if (node != nullptr)
                node = node->next;
Gauthier Quesnel's avatar
Gauthier Quesnel committed
710

711
712
            return *this;
        }
Gauthier Quesnel's avatar
Gauthier Quesnel committed
713

714
715
716
        iterator operator++(int) noexcept
        {
            iterator tmp(*this);
Gauthier Quesnel's avatar
Gauthier Quesnel committed
717

718
719
            if (node != nullptr)
                node = node->next;
Gauthier Quesnel's avatar
Gauthier Quesnel committed
720

721
722
            return tmp;
        }
Gauthier Quesnel's avatar
Gauthier Quesnel committed
723

724
725
726
727
        bool operator==(const iterator& other) const noexcept
        {
            return node == other.node;
        }
Gauthier Quesnel's avatar
Gauthier Quesnel committed
728

729
730
731
732
        bool operator!=(const iterator& other) const noexcept
        {
            return node != other.node;
        }
Gauthier Quesnel's avatar
Gauthier Quesnel committed
733

734
735
736
737
        void swap(iterator& other) noexcept
        {
            std::swap(node, other.node);
        }
738

Gauthier Quesnel's avatar
Gauthier Quesnel committed
739
        friend class flat_list<T>;
740
    };
Gauthier Quesnel's avatar
Gauthier Quesnel committed
741

742
    class const_iterator
Gauthier Quesnel's avatar
Gauthier Quesnel committed
743
    {
744
745
    private:
        const node_type* node{ nullptr };
Gauthier Quesnel's avatar
Gauthier Quesnel committed
746

747
748
749
750
751
752
    public:
        using iterator_category = std::forward_iterator_tag;
        using value_type = T;
        using pointer = T*;
        using reference = T&;
        using difference_type = std::ptrdiff_t;
Gauthier Quesnel's avatar
Gauthier Quesnel committed
753

754
        const_iterator() noexcept = default;
Gauthier Quesnel's avatar
Gauthier Quesnel committed
755

756
757
758
        const_iterator(node_type* n) noexcept
          : node(n)
        {}
Gauthier Quesnel's avatar
Gauthier Quesnel committed
759

760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
        const_iterator(const const_iterator& other) noexcept
          : node(other.node)
        {}

        const_iterator& operator=(const const_iterator& other) noexcept
        {
            node = other.node;
            return *this;
        }

        const T& operator*() noexcept
        {
            return node->value;
        }

        const T* operator->() noexcept
        {
            return &node->value;
        }

        const_iterator operator++() noexcept
        {
            if (node != nullptr)
                node = node->next;

            return *this;
        }

        const_iterator operator++(int) noexcept
        {
            const_iterator tmp(*this);

            if (node != nullptr)
                node = node->next;

            return tmp;
        }

        bool operator==(const const_iterator& other) const noexcept
        {
            return node == other.node;
        }

        bool operator!=(const const_iterator& other) const noexcept
        {
            return node != other.node;
        }

        void swap(const_iterator& other) noexcept
        {
            std::swap(node, other.node);
        }
812

Gauthier Quesnel's avatar
Gauthier Quesnel committed
813
        friend class flat_list<T>;
Gauthier Quesnel's avatar
Gauthier Quesnel committed
814
815
    };

816
817
818
private:
    allocator_type* allocator{ nullptr };
    node_type* node{ nullptr };
Gauthier Quesnel's avatar
Gauthier Quesnel committed
819

820
821
public:
    flat_list() = default;
Gauthier Quesnel's avatar
Gauthier Quesnel committed
822

823
824
    flat_list(allocator_type* allocator_new) noexcept
      : allocator(allocator_new)
Gauthier Quesnel's avatar
Gauthier Quesnel committed
825
826
    {}

827
828
829
830
831
832
    flat_list(const flat_list& other) = delete;
    flat_list& operator=(const flat_list& other) = delete;

    flat_list(flat_list&& other) noexcept
      : allocator(other.allocator)
      , node(other.node)
Gauthier Quesnel's avatar
Gauthier Quesnel committed
833
    {
834
835
        other.allocator = nullptr;
        other.node = nullptr;
Gauthier Quesnel's avatar
Gauthier Quesnel committed
836
837
    }

838
    void set_allocator(allocator_type* allocator_new) noexcept
Gauthier Quesnel's avatar
Gauthier Quesnel committed
839
    {
840
841
842
        clear();
        allocator = allocator_new;
        node = nullptr;
Gauthier Quesnel's avatar
Gauthier Quesnel committed
843
844
    }

845
    flat_list& operator=(flat_list&& other) noexcept
Gauthier Quesnel's avatar
Gauthier Quesnel committed
846
    {
847
848
849
850
851
852
853
854
855
        if (this != &other) {
            clear();
            allocator = other.allocator;
            other.allocator = nullptr;
            node = other.node;
            other.node = nullptr;
        }

        return *this;
Gauthier Quesnel's avatar
Gauthier Quesnel committed
856
857
    }

858
    ~flat_list() noexcept
Gauthier Quesnel's avatar
Gauthier Quesnel committed
859
    {
860
        clear();
Gauthier Quesnel's avatar
Gauthier Quesnel committed
861
862
    }

863
    void clear() noexcept
Gauthier Quesnel's avatar
Gauthier Quesnel committed
864
    {
865
866
867
868
869
870
871
        node_type* prev = node;

        while (node != nullptr) {
            node = node->next;
            allocator->free(prev);
            prev = node;
        }
Gauthier Quesnel's avatar
Gauthier Quesnel committed
872
873
    }

874
    bool empty() const noexcept
Gauthier Quesnel's avatar
Gauthier Quesnel committed
875
    {
876
        return node == nullptr;
Gauthier Quesnel's avatar
Gauthier Quesnel committed
877
878
    }

879
    iterator begin() noexcept
Gauthier Quesnel's avatar
Gauthier Quesnel committed
880
    {
881
882
        return iterator(node);
    }
Gauthier Quesnel's avatar
Gauthier Quesnel committed
883

884
885
886
887
    iterator end() noexcept
    {
        return iterator(nullptr);
    }
Gauthier Quesnel's avatar
Gauthier Quesnel committed
888

889
890
891
892
    const_iterator begin() const noexcept
    {
        return const_iterator(node);
    }
Gauthier Quesnel's avatar
Gauthier Quesnel committed
893

894
895
896
    const_iterator end() const noexcept
    {
        return const_iterator(nullptr);
Gauthier Quesnel's avatar
Gauthier Quesnel committed
897
898
    }

899
900
    reference front() noexcept
    {
901
        irt_assert(!empty());
902
903
904
905
906
907

        return node->value;
    }

    const_reference front() const noexcept
    {
908
        irt_assert(!empty());
909
910
911
912

        return node->value;
    }

913
914
    template<typename... Args>
    iterator emplace_front(Args&&... args) noexcept
Gauthier Quesnel's avatar
Gauthier Quesnel committed
915
    {
916
        node_type* new_node = allocator->alloc();
Gauthier Quesnel's avatar
Gauthier Quesnel committed
917

918
        new (&new_node->value) T(std::forward<Args>(args)...);
Gauthier Quesnel's avatar
Gauthier Quesnel committed
919

920
921
        new_node->next = node;
        node = new_node;
Gauthier Quesnel's avatar
Gauthier Quesnel committed
922

923
        return begin();
Gauthier Quesnel's avatar
Gauthier Quesnel committed
924
925
    }

926
927
    template<typename... Args>
    iterator emplace_after(iterator it, Args&&... args) noexcept
Gauthier Quesnel's avatar
Gauthier Quesnel committed
928
    {
929
930
        node_type* new_node = allocator->alloc();
        new (&new_node->value) T(std::forward<Args>(args)...);
Gauthier Quesnel's avatar
Gauthier Quesnel committed
931

932
933
        if (it->node == nullptr)
            return emplace_front(std::forward<Args>(args)...);
Gauthier Quesnel's avatar
Gauthier Quesnel committed
934

935
936
        new_node->next = it->node->next;
        it->node->next = new_node;
Gauthier Quesnel's avatar
Gauthier Quesnel committed
937

938
        return iterator(new_node);
Gauthier Quesnel's avatar
Gauthier Quesnel committed
939
940
    }

941
942
    template<typename... Args>
    iterator try_emplace_front(Args&&... args) noexcept
Gauthier Quesnel's avatar
Gauthier Quesnel committed
943
    {
944
        auto [success, new_node] = allocator->try_alloc();
Gauthier Quesnel's avatar
Gauthier Quesnel committed
945

946
947
        if (!success)
            return end();
Gauthier Quesnel's avatar
Gauthier Quesnel committed
948

949
        new (&new_node->value) T(std::forward<Args>(args)...);
Gauthier Quesnel's avatar
Gauthier Quesnel committed
950

951
952
953
954
        new_node->next = node;
        node = new_node;

        return begin();
Gauthier Quesnel's avatar
Gauthier Quesnel committed
955
956
    }

957
958
    template<typename... Args>
    iterator try_emplace_after(iterator it, Args&&... args) noexcept
Gauthier Quesnel's avatar
Gauthier Quesnel committed
959
    {
960
        auto [success, new_node] = allocator->try_alloc();
Gauthier Quesnel's avatar
Gauthier Quesnel committed
961

962
963
        if (!success)
            return end();
Gauthier Quesnel's avatar
Gauthier Quesnel committed
964

965
        new (&new_node->value) T(std::forward<Args>(args)...);
Gauthier Quesnel's avatar
Gauthier Quesnel committed
966

967
968
        if (it->node == nullptr)
            return emplace_front(std::forward<Args>(args)...);
Gauthier Quesnel's avatar
Gauthier Quesnel committed
969

970
971
        new_node->next = it->node->next;
        it->node->next = new_node;
Gauthier Quesnel's avatar
Gauthier Quesnel committed
972

973
        return iterator(new_node);
Gauthier Quesnel's avatar
Gauthier Quesnel committed
974
975
    }

976
    void pop_front() noexcept
Gauthier Quesnel's avatar
Gauthier Quesnel committed
977
    {
978
979
        if (node == nullptr)
            return;
Gauthier Quesnel's avatar
Gauthier Quesnel committed
980

981
982
        node_type* to_delete = node;
        node = node->next;
Gauthier Quesnel's avatar
Gauthier Quesnel committed
983

984
        if constexpr (!std::is_trivial_v<T>)
985
            to_delete->value.~T();
Gauthier Quesnel's avatar
Gauthier Quesnel committed
986

987
        allocator->free(to_delete);
Gauthier Quesnel's avatar
Gauthier Quesnel committed
988
989
    }

990
    iterator erase_after(iterator it) noexcept
Gauthier Quesnel's avatar
Gauthier Quesnel committed
991
    {
992
        irt_assert(allocator);
Gauthier Quesnel's avatar
Gauthier Quesnel committed
993

994
995
        if (it.node == nullptr)
            return end();
Gauthier Quesnel's avatar
Gauthier Quesnel committed
996

997
998
999
        node_type* to_delete = it.node->next;
        if (to_delete == nullptr)
            return end();
Gauthier Quesnel's avatar
Gauthier Quesnel committed
1000

1001
1002
        node_type* next = to_delete->next;
        it.node->next = next;
Gauthier Quesnel's avatar
Gauthier Quesnel committed
1003

1004
        if constexpr (!std::is_trivial_v<T>)
1005
            to_delete->value.~T();
Gauthier Quesnel's avatar
Gauthier Quesnel committed
1006

1007
        allocator->free(to_delete);
Gauthier Quesnel's avatar
Gauthier Quesnel committed
1008

1009
        return iterator(next);
Gauthier Quesnel's avatar
Gauthier Quesnel committed
1010
1011
1012
1013
    }
};

template<typename T>
1014
class flat_double_list
Gauthier Quesnel's avatar
Gauthier Quesnel committed
1015
{
1016
private:
Gauthier Quesnel's avatar
Gauthier Quesnel committed
1017
1018
1019
1020
    struct node_type
    {
        T value;
        node_type* next = nullptr;
1021
        node_type* prev = nullptr;
Gauthier Quesnel's avatar
Gauthier Quesnel committed
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
    };

public:
    using allocator_type = block_allocator<node_type>;
    using value_type = T;
    using reference = T&;
    using pointer = T*;

    class iterator
    {
    private:
1033
        flat_double_list* list{ nullptr };
Gauthier Quesnel's avatar
Gauthier Quesnel committed
1034
1035
1036
        node_type* node{ nullptr };

    public:
1037
        using iterator_category = std::bidirectional_iterator_tag;
Gauthier Quesnel's avatar
Gauthier Quesnel committed
1038
1039
1040
1041
1042
1043
        using value_type = T;
        using pointer = T*;
        using reference = T&;

        iterator() noexcept = default;

1044
1045
1046
        iterator(flat_double_list* lst, node_type* n) noexcept
          : list(lst)
          , node(n)
Gauthier Quesnel's avatar
Gauthier Quesnel committed
1047
1048
1049
        {}

        iterator(const iterator& other) noexcept
1050
1051
          : list(other.list)
          , node(other.node)
Gauthier Quesnel's avatar
Gauthier Quesnel committed
1052
1053
1054
1055
        {}

        iterator& operator=(const iterator& other) noexcept
        {
1056
            list = other.list;
Gauthier Quesnel's avatar
Gauthier Quesnel committed
1057
1058
1059
1060
1061
1062
1063
1064
1065
            node = other.node;
            return *this;
        }

        T& operator*() noexcept
        {
            return node->value;
        }

1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
        T* operator*() const noexcept
        {
            return node->value;
        }

        pointer operator->() noexcept
        {
            return &(node->value);
        }

        pointer operator->() const noexcept
Gauthier Quesnel's avatar
Gauthier Quesnel committed
1077
1078
1079
1080
1081
1082
        {
            return &node->value;
        }

        iterator operator++() noexcept
        {
1083
            node = (node == nullptr) ? list->m_front : node->next;
Gauthier Quesnel's avatar
Gauthier Quesnel committed
1084
1085
1086
1087
1088
1089
1090
1091

            return *this;
        }

        iterator operator++(int) noexcept
        {
            iterator tmp(*this);

1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
            node = (node == nullptr) ? list->m_front : node->next;

            return tmp;
        }

        iterator operator--() noexcept
        {
            node = (node == nullptr) ? list->m_back : node->prev;

            return *this;
        }

        iterator operator--(int) noexcept
        {
            iterator tmp(*this);

            node = (node == nullptr) ? list->m_back : node->prev;
Gauthier Quesnel's avatar
Gauthier Quesnel committed
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124

            return tmp;
        }

        bool operator==(const iterator& other) const noexcept
        {
            return node == other.node;
        }

        bool operator!=(const iterator& other) const noexcept
        {
            return node != other.node;
        }

        void swap(iterator& other) noexcept
        {
1125
            std::swap(list, other.list);
Gauthier Quesnel's avatar
Gauthier Quesnel committed
1126
1127
1128
1129
1130
1131
1132
            std::swap(node, other.node);
        }
    };

    class const_iterator
    {
    private:
1133
1134
        const flat_double_list* list{ nullptr };
        node_type* node{ nullptr };
Gauthier Quesnel's avatar
Gauthier Quesnel committed
1135
1136

    public:
1137
        using const_iterator_category = std::bidirectional_iterator_tag;
Gauthier Quesnel's avatar
Gauthier Quesnel committed
1138
1139
1140
1141
1142
1143
        using value_type = T;
        using pointer = T*;
        using reference = T&;

        const_iterator() noexcept = default;

1144
1145
1146
        const_iterator(const flat_double_list* lst, node_type* n) noexcept
          : list(lst)
          , node(n)
Gauthier Quesnel's avatar
Gauthier Quesnel committed
1147
1148
1149
        {}

        const_iterator(const const_iterator& other) noexcept
1150
1151
          : list(other.list)
          , node(other.node)
Gauthier Quesnel's avatar
Gauthier Quesnel committed
1152
1153
1154
1155
        {}

        const_iterator& operator=(const const_iterator& other) noexcept
        {
1156
            list = other.list;
Gauthier Quesnel's avatar
Gauthier Quesnel committed
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
            node = other.node;
            return *this;
        }

        const T& operator*() noexcept
        {
            return node->value;
        }

        const T* operator->() noexcept
        {
1168
            return &(node->value);
Gauthier Quesnel's avatar
Gauthier Quesnel committed
1169
1170
1171
1172
        }

        const_iterator operator++() noexcept
        {
1173
            node = (node == nullptr) ? list->m_front : node->next;
Gauthier Quesnel's avatar
Gauthier Quesnel committed
1174
1175
1176
1177
1178
1179
1180
1181

            return *this;
        }

        const_iterator operator++(int) noexcept
        {
            const_iterator tmp(*this);

1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
            node = (node == nullptr) ? list->m_front : node->next;

            return tmp;
        }

        const_iterator operator--() noexcept
        {
            node = (node == nullptr) ? list->m_back : node->prev;

            return *this;
        }

        const_iterator operator--(int) noexcept
        {
            const_iterator tmp(*this);

            node = (node == nullptr) ? list->m_back : node->prev;
Gauthier Quesnel's avatar
Gauthier Quesnel committed
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214

            return tmp;
        }

        bool operator==(const const_iterator& other) const noexcept
        {
            return node == other.node;
        }

        bool operator!=(const const_iterator& other) const noexcept
        {
            return node != other.node;
        }

        void swap(const_iterator& other) noexcept
        {
1215
            std::swap(list, other.list);
Gauthier Quesnel's avatar
Gauthier Quesnel committed
1216
1217
1218
1219
1220
            std::swap(node, other.node);
        }
    };

private:
1221
1222
1223
1224
    allocator_type* m_allocator{ nullptr };
    node_type* m_front{ nullptr };
    node_type* m_back{ nullptr };
    i64 m_size{ 0 };
Gauthier Quesnel's avatar
Gauthier Quesnel committed
1225
1226

public:
1227
    flat_double_list() = default;
Gauthier Quesnel's avatar
Gauthier Quesnel committed
1228

1229
1230
    flat_double_list(allocator_type* allocator)
      : m_allocator(allocator)
Gauthier Quesnel's avatar
Gauthier Quesnel committed
1231
1232
    {}

1233
1234
    flat_double_list(const flat_double_list& other) = delete;
    flat_double_list& operator=(const flat_double_list& other) = delete;
Gauthier Quesnel's avatar
Gauthier Quesnel committed
1235

1236
1237
1238
1239
1240
    flat_double_list(flat_double_list&& other) noexcept
      : m_allocator(other.m_allocator)
      , m_front(other.m_front)
      , m_back(other.m_back)
      , m_size(other.m_size)
Gauthier Quesnel's avatar
Gauthier Quesnel committed
1241
    {
1242
1243
1244
1245
        other.m_allocator = nullptr;
        other.m_front = nullptr;
        other.m_back = nullptr;
        other.m_size = 0;
Gauthier Quesnel's avatar
Gauthier Quesnel committed
1246
1247
    }

1248
    void set_allocator(allocator_type* allocator) noexcept
Gauthier Quesnel's avatar
Gauthier Quesnel committed
1249
1250
    {
        clear();
1251
1252
1253
1254
        m_allocator = allocator;
        m_front = nullptr;
        m_back = nullptr;
        m_size = 0;
Gauthier Quesnel's avatar
Gauthier Quesnel committed
1255
1256
    }

Gauthier Quesnel's avatar
Gauthier Quesnel committed
1257
1258
1259
1260
1261
    allocator_type* get_allocator() const noexcept
    {
        return m_allocator;
    }

1262
    flat_double_list& operator=(flat_double_list&& other) noexcept
Gauthier Quesnel's avatar
Gauthier Quesnel committed
1263
1264
1265
    {
        if (this != &other) {
            clear();
1266
1267
1268
1269
1270
1271
1272
1273
            m_allocator = other.m_allocator;
            other.m_allocator = nullptr;
            m_front = other.m_front;
            other.m_front = nullptr;
            m_back = other.m_back;
            other.m_back = nullptr;
            m_size = other.m_size;
            other.m_size = 0;
Gauthier Quesnel's avatar
Gauthier Quesnel committed
1274
1275
1276
1277
1278
        }

        return *this;
    }

1279
    ~flat_double_list() noexcept
Gauthier Quesnel's avatar
Gauthier Quesnel committed
1280
1281
1282
1283
1284
1285
    {
        clear();
    }

    void clear() noexcept
    {
1286
        node_type* prev = m_front;
Gauthier Quesnel's avatar
Gauthier Quesnel committed
1287

1288
1289
1290
1291
        while (m_front != nullptr) {
            m_front = m_front->next;
            m_allocator->free(prev);
            prev = m_front;
Gauthier Quesnel's avatar
Gauthier Quesnel committed
1292
1293
        }

1294
1295
        m_size = 0;
        m_back = nullptr;
Gauthier Quesnel's avatar
Gauthier Quesnel committed
1296
1297
1298
1299
    }

    iterator begin() noexcept
    {
1300
        return iterator(this, m_front);
Gauthier Quesnel's avatar
Gauthier Quesnel committed
1301
1302
1303
1304
    }

    iterator end() noexcept
    {
1305
        return iterator(this, nullptr);
Gauthier Quesnel's avatar
Gauthier Quesnel committed
1306
1307
1308
1309
    }

    const_iterator begin() const noexcept
    {
1310
        return const_iterator(this, m_front);
Gauthier Quesnel's avatar
Gauthier Quesnel committed
1311
1312
1313
1314
    }

    const_iterator end() const noexcept
    {
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
        return const_iterator(this, nullptr);
    }

    reference front() noexcept
    {
        return m_front->value;
    }

    reference back() noexcept
    {
        return m_back->value;
    }

    reference front() const noexcept
    {
        return m_front->value;
    }

    reference back() const noexcept
    {
        return m_back->value;
Gauthier Quesnel's avatar
Gauthier Quesnel committed
1336
1337
1338
1339
1340
    }

    template<typename... Args>
    iterator emplace_front(Args&&... args) noexcept
    {
1341
        node_type* new_node = m_allocator->alloc();
Gauthier Quesnel's avatar
Gauthier Quesnel committed
1342
        new (&new_node->value) T(std::forward<Args>(args)...);
1343
        ++m_size;
Gauthier Quesnel's avatar
Gauthier Quesnel committed
1344

1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
        if (m_front) {
            new_node->prev = nullptr;
            new_node->next = m_front;
            m_front->prev = new_node;
            m_front = new_node;
        } else {
            new_node->prev = nullptr;
            new_node->next = nullptr;
            m_front =