summaryrefslogtreecommitdiff
path: root/core/fxcrt/fx_basic.h
blob: 007c362ad680df5145517638253d111b2afae0b5 (plain)
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
// Copyright 2014 PDFium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com

#ifndef CORE_FXCRT_FX_BASIC_H_
#define CORE_FXCRT_FX_BASIC_H_

#include <algorithm>
#include <memory>

#include "core/fxcrt/cfx_retain_ptr.h"
#include "core/fxcrt/fx_memory.h"
#include "core/fxcrt/fx_stream.h"
#include "core/fxcrt/fx_string.h"
#include "core/fxcrt/fx_system.h"

#ifdef PDF_ENABLE_XFA
#define FX_IsOdd(a) ((a)&1)
#endif  // PDF_ENABLE_XFA

class CFX_BinaryBuf {
 public:
  CFX_BinaryBuf();
  explicit CFX_BinaryBuf(FX_STRSIZE size);
  ~CFX_BinaryBuf();

  uint8_t* GetBuffer() const { return m_pBuffer.get(); }
  FX_STRSIZE GetSize() const { return m_DataSize; }

  void Clear();
  void EstimateSize(FX_STRSIZE size, FX_STRSIZE alloc_step = 0);
  void AppendBlock(const void* pBuf, FX_STRSIZE size);
  void AppendString(const CFX_ByteString& str) {
    AppendBlock(str.c_str(), str.GetLength());
  }

  void AppendByte(uint8_t byte) {
    ExpandBuf(1);
    m_pBuffer.get()[m_DataSize++] = byte;
  }

  void InsertBlock(FX_STRSIZE pos, const void* pBuf, FX_STRSIZE size);
  void Delete(int start_index, int count);

  // Releases ownership of |m_pBuffer| and returns it.
  std::unique_ptr<uint8_t, FxFreeDeleter> DetachBuffer();

 protected:
  void ExpandBuf(FX_STRSIZE size);

  FX_STRSIZE m_AllocStep;
  FX_STRSIZE m_AllocSize;
  FX_STRSIZE m_DataSize;
  std::unique_ptr<uint8_t, FxFreeDeleter> m_pBuffer;
};

class CFX_ByteTextBuf : public CFX_BinaryBuf {
 public:
  FX_STRSIZE GetLength() const { return m_DataSize; }
  CFX_ByteString MakeString() const {
    return CFX_ByteString(m_pBuffer.get(), m_DataSize);
  }
  CFX_ByteStringC AsStringC() const {
    return CFX_ByteStringC(m_pBuffer.get(), m_DataSize);
  }

  void AppendChar(int ch) { AppendByte(static_cast<uint8_t>(ch)); }
  CFX_ByteTextBuf& operator<<(int i);
  CFX_ByteTextBuf& operator<<(uint32_t i);
  CFX_ByteTextBuf& operator<<(double f);
  CFX_ByteTextBuf& operator<<(const char* pStr) {
    return *this << CFX_ByteStringC(pStr);
  }
  CFX_ByteTextBuf& operator<<(const CFX_ByteString& str) {
    return *this << str.AsStringC();
  }
  CFX_ByteTextBuf& operator<<(const CFX_ByteStringC& lpsz);
  CFX_ByteTextBuf& operator<<(const CFX_ByteTextBuf& buf);
};

class CFX_WideTextBuf : public CFX_BinaryBuf {
 public:
  void AppendChar(wchar_t wch);
  FX_STRSIZE GetLength() const { return m_DataSize / sizeof(wchar_t); }
  wchar_t* GetBuffer() const {
    return reinterpret_cast<wchar_t*>(m_pBuffer.get());
  }

  CFX_WideStringC AsStringC() const {
    return CFX_WideStringC(reinterpret_cast<const wchar_t*>(m_pBuffer.get()),
                           m_DataSize / sizeof(wchar_t));
  }
  CFX_WideString MakeString() const {
    return CFX_WideString(reinterpret_cast<const wchar_t*>(m_pBuffer.get()),
                          m_DataSize / sizeof(wchar_t));
  }

  void Delete(int start_index, int count) {
    CFX_BinaryBuf::Delete(start_index * sizeof(wchar_t),
                          count * sizeof(wchar_t));
  }

  CFX_WideTextBuf& operator<<(int i);
  CFX_WideTextBuf& operator<<(double f);
  CFX_WideTextBuf& operator<<(const wchar_t* lpsz);
  CFX_WideTextBuf& operator<<(const CFX_WideStringC& str);
  CFX_WideTextBuf& operator<<(const CFX_WideString& str);
  CFX_WideTextBuf& operator<<(const CFX_WideTextBuf& buf);
};

class CFX_FileBufferArchive {
 public:
  CFX_FileBufferArchive();
  ~CFX_FileBufferArchive();

  void Clear();
  bool Flush();
  int32_t AppendBlock(const void* pBuf, size_t size);
  int32_t AppendByte(uint8_t byte);
  int32_t AppendDWord(uint32_t i);
  int32_t AppendString(const CFX_ByteStringC& lpsz);
  void AttachFile(const CFX_RetainPtr<IFX_WriteStream>& pFile);

 private:
  static const size_t kBufSize = 32768;

  size_t m_Length;
  std::unique_ptr<uint8_t, FxFreeDeleter> m_pBuffer;
  CFX_RetainPtr<IFX_WriteStream> m_pFile;
};

class CFX_CharMap {
 public:
  static CFX_ByteString GetByteString(uint16_t codepage,
                                      const CFX_WideStringC& wstr);

  static CFX_WideString GetWideString(uint16_t codepage,
                                      const CFX_ByteStringC& bstr);

  CFX_CharMap() = delete;
};

class CFX_UTF8Decoder {
 public:
  CFX_UTF8Decoder() { m_PendingBytes = 0; }

  void Clear();

  void Input(uint8_t byte);

  void AppendChar(uint32_t ch);

  void ClearStatus() { m_PendingBytes = 0; }

  CFX_WideStringC GetResult() const { return m_Buffer.AsStringC(); }

 protected:
  int m_PendingBytes;

  uint32_t m_PendingChar;

  CFX_WideTextBuf m_Buffer;
};

class CFX_UTF8Encoder {
 public:
  CFX_UTF8Encoder() {}

  void Input(wchar_t unicode);
  void AppendStr(const CFX_ByteStringC& str) { m_Buffer << str; }
  CFX_ByteStringC GetResult() const { return m_Buffer.AsStringC(); }

 protected:
  CFX_ByteTextBuf m_Buffer;
};

class CFX_BasicArray {
 protected:
  explicit CFX_BasicArray(int unit_size);
  CFX_BasicArray(const CFX_BasicArray&) = delete;
  ~CFX_BasicArray();

  bool SetSize(int nNewSize);
  bool Append(const CFX_BasicArray& src);
  bool Copy(const CFX_BasicArray& src);
  uint8_t* InsertSpaceAt(int nIndex, int nCount);
  bool RemoveAt(int nIndex, int nCount);
  bool InsertAt(int nStartIndex, const CFX_BasicArray* pNewArray);
  const void* GetDataPtr(int index) const;

 protected:
  uint8_t* m_pData;
  int m_nSize;
  int m_nMaxSize;
  int m_nUnitSize;
};

template <class TYPE>
class CFX_ArrayTemplate : public CFX_BasicArray {
 public:
  CFX_ArrayTemplate() : CFX_BasicArray(sizeof(TYPE)) {}

  int GetSize() const { return m_nSize; }

  int GetUpperBound() const { return m_nSize - 1; }

  bool SetSize(int nNewSize) { return CFX_BasicArray::SetSize(nNewSize); }

  void RemoveAll() { SetSize(0); }

  const TYPE GetAt(int nIndex) const {
    if (nIndex < 0 || nIndex >= m_nSize) {
      PDFIUM_IMMEDIATE_CRASH();
    }
    return ((const TYPE*)m_pData)[nIndex];
  }

  bool SetAt(int nIndex, TYPE newElement) {
    if (nIndex < 0 || nIndex >= m_nSize) {
      return false;
    }
    ((TYPE*)m_pData)[nIndex] = newElement;
    return true;
  }

  TYPE& ElementAt(int nIndex) {
    if (nIndex < 0 || nIndex >= m_nSize) {
      PDFIUM_IMMEDIATE_CRASH();
    }
    return ((TYPE*)m_pData)[nIndex];
  }

  const TYPE* GetData() const { return (const TYPE*)m_pData; }

  TYPE* GetData() { return (TYPE*)m_pData; }

  bool SetAtGrow(int nIndex, TYPE newElement) {
    if (nIndex < 0)
      return false;

    if (nIndex >= m_nSize && !SetSize(nIndex + 1))
      return false;

    ((TYPE*)m_pData)[nIndex] = newElement;
    return true;
  }

  bool Add(TYPE newElement) {
    if (m_nSize < m_nMaxSize) {
      m_nSize++;
    } else if (!SetSize(m_nSize + 1)) {
      return false;
    }
    ((TYPE*)m_pData)[m_nSize - 1] = newElement;
    return true;
  }

  bool Append(const CFX_ArrayTemplate& src) {
    return CFX_BasicArray::Append(src);
  }

  bool Copy(const CFX_ArrayTemplate& src) { return CFX_BasicArray::Copy(src); }

  TYPE* GetDataPtr(int index) {
    return (TYPE*)CFX_BasicArray::GetDataPtr(index);
  }

  TYPE* AddSpace() { return (TYPE*)CFX_BasicArray::InsertSpaceAt(m_nSize, 1); }

  TYPE* InsertSpaceAt(int nIndex, int nCount) {
    return (TYPE*)CFX_BasicArray::InsertSpaceAt(nIndex, nCount);
  }

  const TYPE operator[](int nIndex) const {
    if (nIndex < 0 || nIndex >= m_nSize) {
      *(volatile char*)0 = '\0';
    }
    return ((const TYPE*)m_pData)[nIndex];
  }

  TYPE& operator[](int nIndex) {
    if (nIndex < 0 || nIndex >= m_nSize) {
      *(volatile char*)0 = '\0';
    }
    return ((TYPE*)m_pData)[nIndex];
  }

  bool InsertAt(int nIndex, TYPE newElement, int nCount = 1) {
    if (!InsertSpaceAt(nIndex, nCount)) {
      return false;
    }
    while (nCount--) {
      ((TYPE*)m_pData)[nIndex++] = newElement;
    }
    return true;
  }

  bool RemoveAt(int nIndex, int nCount = 1) {
    return CFX_BasicArray::RemoveAt(nIndex, nCount);
  }

  bool InsertAt(int nStartIndex, const CFX_BasicArray* pNewArray) {
    return CFX_BasicArray::InsertAt(nStartIndex, pNewArray);
  }

  int Find(TYPE data, int iStart = 0) const {
    if (iStart < 0) {
      return -1;
    }
    for (; iStart < (int)m_nSize; iStart++)
      if (((TYPE*)m_pData)[iStart] == data) {
        return iStart;
      }
    return -1;
  }
};

template <class DataType, int FixedSize>
class CFX_FixedBufGrow {
 public:
  explicit CFX_FixedBufGrow(int data_size) {
    if (data_size > FixedSize) {
      m_pGrowData.reset(FX_Alloc(DataType, data_size));
      return;
    }
    FXSYS_memset(m_FixedData, 0, sizeof(DataType) * FixedSize);
  }
  operator DataType*() { return m_pGrowData ? m_pGrowData.get() : m_FixedData; }

 private:
  DataType m_FixedData[FixedSize];
  std::unique_ptr<DataType, FxFreeDeleter> m_pGrowData;
};

class CFX_BitStream {
 public:
  void Init(const uint8_t* pData, uint32_t dwSize);

  uint32_t GetBits(uint32_t nBits);

  void ByteAlign();

  bool IsEOF() { return m_BitPos >= m_BitSize; }

  void SkipBits(uint32_t nBits) { m_BitPos += nBits; }

  void Rewind() { m_BitPos = 0; }

  uint32_t GetPos() const { return m_BitPos; }

  uint32_t BitsRemaining() const {
    return m_BitSize >= m_BitPos ? m_BitSize - m_BitPos : 0;
  }

 protected:
  uint32_t m_BitPos;
  uint32_t m_BitSize;
  const uint8_t* m_pData;
};

class IFX_Pause {
 public:
  virtual ~IFX_Pause() {}
  virtual bool NeedToPauseNow() = 0;
};

template <typename T>
class CFX_AutoRestorer {
 public:
  explicit CFX_AutoRestorer(T* location)
      : m_Location(location), m_OldValue(*location) {}
  ~CFX_AutoRestorer() { *m_Location = m_OldValue; }

 private:
  T* const m_Location;
  const T m_OldValue;
};

#define FX_DATALIST_LENGTH 1024
template <size_t unit>
class CFX_SortListArray {
 protected:
  struct DataList {
    int32_t start;

    int32_t count;
    uint8_t* data;
  };

 public:
  CFX_SortListArray() : m_CurList(0) {}

  ~CFX_SortListArray() { Clear(); }

  void Clear() {
    for (int32_t i = m_DataLists.GetUpperBound(); i >= 0; i--) {
      DataList list = m_DataLists.ElementAt(i);
      FX_Free(list.data);
    }
    m_DataLists.RemoveAll();
    m_CurList = 0;
  }

  void Append(int32_t nStart, int32_t nCount) {
    if (nStart < 0) {
      return;
    }
    while (nCount > 0) {
      int32_t temp_count = std::min(nCount, FX_DATALIST_LENGTH);
      DataList list;
      list.data = FX_Alloc2D(uint8_t, temp_count, unit);
      list.start = nStart;
      list.count = temp_count;
      Append(list);
      nCount -= temp_count;
      nStart += temp_count;
    }
  }

  uint8_t* GetAt(int32_t nIndex) {
    if (nIndex < 0) {
      return nullptr;
    }
    if (m_CurList < 0 || m_CurList >= m_DataLists.GetSize()) {
      return nullptr;
    }
    DataList* pCurList = m_DataLists.GetDataPtr(m_CurList);
    if (!pCurList || nIndex < pCurList->start ||
        nIndex >= pCurList->start + pCurList->count) {
      pCurList = nullptr;
      int32_t iStart = 0;
      int32_t iEnd = m_DataLists.GetUpperBound();
      int32_t iMid = 0;
      while (iStart <= iEnd) {
        iMid = (iStart + iEnd) / 2;
        DataList* list = m_DataLists.GetDataPtr(iMid);
        if (nIndex < list->start) {
          iEnd = iMid - 1;
        } else if (nIndex >= list->start + list->count) {
          iStart = iMid + 1;
        } else {
          pCurList = list;
          m_CurList = iMid;
          break;
        }
      }
    }
    return pCurList ? pCurList->data + (nIndex - pCurList->start) * unit
                    : nullptr;
  }

 protected:
  void Append(const DataList& list) {
    int32_t iStart = 0;
    int32_t iEnd = m_DataLists.GetUpperBound();
    int32_t iFind = 0;
    while (iStart <= iEnd) {
      int32_t iMid = (iStart + iEnd) / 2;
      DataList* cur_list = m_DataLists.GetDataPtr(iMid);
      if (list.start < cur_list->start + cur_list->count) {
        iEnd = iMid - 1;
      } else {
        if (iMid == iEnd) {
          iFind = iMid + 1;
          break;
        }
        DataList* next_list = m_DataLists.GetDataPtr(iMid + 1);
        if (list.start < next_list->start) {
          iFind = iMid + 1;
          break;
        } else {
          iStart = iMid + 1;
        }
      }
    }
    m_DataLists.InsertAt(iFind, list);
  }
  int32_t m_CurList;
  CFX_ArrayTemplate<DataList> m_DataLists;
};
template <typename T1, typename T2>
class CFX_ListArrayTemplate {
 public:
  void Clear() { m_Data.Clear(); }

  void Add(int32_t nStart, int32_t nCount) { m_Data.Append(nStart, nCount); }

  T2& operator[](int32_t nIndex) {
    uint8_t* data = m_Data.GetAt(nIndex);
    ASSERT(data);
    return (T2&)(*(volatile T2*)data);
  }

  T2* GetPtrAt(int32_t nIndex) { return (T2*)m_Data.GetAt(nIndex); }

 protected:
  T1 m_Data;
};
typedef CFX_ListArrayTemplate<CFX_SortListArray<sizeof(FX_FILESIZE)>,
                              FX_FILESIZE>
    CFX_FileSizeListArray;

class CFX_Vector_3by1 {
 public:
  CFX_Vector_3by1() : a(0.0f), b(0.0f), c(0.0f) {}

  CFX_Vector_3by1(FX_FLOAT a1, FX_FLOAT b1, FX_FLOAT c1)
      : a(a1), b(b1), c(c1) {}

  FX_FLOAT a;
  FX_FLOAT b;
  FX_FLOAT c;
};
class CFX_Matrix_3by3 {
 public:
  CFX_Matrix_3by3()
      : a(0.0f),
        b(0.0f),
        c(0.0f),
        d(0.0f),
        e(0.0f),
        f(0.0f),
        g(0.0f),
        h(0.0f),
        i(0.0f) {}

  CFX_Matrix_3by3(FX_FLOAT a1,
                  FX_FLOAT b1,
                  FX_FLOAT c1,
                  FX_FLOAT d1,
                  FX_FLOAT e1,
                  FX_FLOAT f1,
                  FX_FLOAT g1,
                  FX_FLOAT h1,
                  FX_FLOAT i1)
      : a(a1), b(b1), c(c1), d(d1), e(e1), f(f1), g(g1), h(h1), i(i1) {}

  CFX_Matrix_3by3 Inverse();

  CFX_Matrix_3by3 Multiply(const CFX_Matrix_3by3& m);

  CFX_Vector_3by1 TransformVector(const CFX_Vector_3by1& v);

  FX_FLOAT a;
  FX_FLOAT b;
  FX_FLOAT c;
  FX_FLOAT d;
  FX_FLOAT e;
  FX_FLOAT f;
  FX_FLOAT g;
  FX_FLOAT h;
  FX_FLOAT i;
};

uint32_t GetBits32(const uint8_t* pData, int bitpos, int nbits);

#endif  // CORE_FXCRT_FX_BASIC_H_