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| 1 // Copyright 2014 PDFium Authors. All rights reserved. | |
| 2 // Use of this source code is governed by a BSD-style license that can be | |
| 3 // found in the LICENSE file. | |
| 4 | |
| 5 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com | |
| 6 | |
| 7 #ifndef CORE_INCLUDE_FXCRT_FX_STRING_H_ | |
| 8 #define CORE_INCLUDE_FXCRT_FX_STRING_H_ | |
| 9 | |
| 10 #include <stdint.h> // For intptr_t. | |
| 11 #include <algorithm> | |
| 12 | |
| 13 #include "core/include/fxcrt/fx_memory.h" | |
| 14 #include "core/include/fxcrt/fx_system.h" | |
| 15 | |
| 16 class CFX_BinaryBuf; | |
| 17 class CFX_ByteString; | |
| 18 class CFX_WideString; | |
| 19 | |
| 20 // An immutable string with caller-provided storage which must outlive the | |
| 21 // string itself. | |
| 22 class CFX_ByteStringC { | |
| 23 public: | |
| 24 typedef FX_CHAR value_type; | |
| 25 | |
| 26 CFX_ByteStringC() { | |
| 27 m_Ptr = NULL; | |
| 28 m_Length = 0; | |
| 29 } | |
| 30 | |
| 31 CFX_ByteStringC(const uint8_t* ptr, FX_STRSIZE size) { | |
| 32 m_Ptr = ptr; | |
| 33 m_Length = size; | |
| 34 } | |
| 35 | |
| 36 CFX_ByteStringC(const FX_CHAR* ptr) { | |
| 37 m_Ptr = (const uint8_t*)ptr; | |
| 38 m_Length = ptr ? FXSYS_strlen(ptr) : 0; | |
| 39 } | |
| 40 | |
| 41 // |ch| must be an lvalue that outlives the the CFX_ByteStringC. However, | |
| 42 // the use of char rvalues are not caught at compile time. They are | |
| 43 // implicitly promoted to CFX_ByteString (see below) and then the | |
| 44 // CFX_ByteStringC is constructed from the CFX_ByteString via the alternate | |
| 45 // constructor below. The CFX_ByteString then typically goes out of scope | |
| 46 // and |m_Ptr| may be left pointing to invalid memory. Beware. | |
| 47 // TODO(tsepez): Mark single-argument string constructors as explicit. | |
| 48 CFX_ByteStringC(FX_CHAR& ch) { | |
| 49 m_Ptr = (const uint8_t*)&ch; | |
| 50 m_Length = 1; | |
| 51 } | |
| 52 | |
| 53 CFX_ByteStringC(const FX_CHAR* ptr, FX_STRSIZE len) { | |
| 54 m_Ptr = (const uint8_t*)ptr; | |
| 55 m_Length = (len == -1) ? FXSYS_strlen(ptr) : len; | |
| 56 } | |
| 57 | |
| 58 CFX_ByteStringC(const CFX_ByteStringC& src) { | |
| 59 m_Ptr = src.m_Ptr; | |
| 60 m_Length = src.m_Length; | |
| 61 } | |
| 62 | |
| 63 CFX_ByteStringC(const CFX_ByteString& src); | |
| 64 | |
| 65 CFX_ByteStringC& operator=(const FX_CHAR* src) { | |
| 66 m_Ptr = (const uint8_t*)src; | |
| 67 m_Length = m_Ptr ? FXSYS_strlen(src) : 0; | |
| 68 return *this; | |
| 69 } | |
| 70 | |
| 71 CFX_ByteStringC& operator=(const CFX_ByteStringC& src) { | |
| 72 m_Ptr = src.m_Ptr; | |
| 73 m_Length = src.m_Length; | |
| 74 return *this; | |
| 75 } | |
| 76 | |
| 77 CFX_ByteStringC& operator=(const CFX_ByteString& src); | |
| 78 | |
| 79 bool operator==(const char* ptr) const { | |
| 80 return FXSYS_strlen(ptr) == m_Length && | |
| 81 FXSYS_memcmp(ptr, m_Ptr, m_Length) == 0; | |
| 82 } | |
| 83 bool operator==(const CFX_ByteStringC& other) const { | |
| 84 return other.m_Length == m_Length && | |
| 85 FXSYS_memcmp(other.m_Ptr, m_Ptr, m_Length) == 0; | |
| 86 } | |
| 87 bool operator!=(const char* ptr) const { return !(*this == ptr); } | |
| 88 bool operator!=(const CFX_ByteStringC& other) const { | |
| 89 return !(*this == other); | |
| 90 } | |
| 91 | |
| 92 FX_DWORD GetID(FX_STRSIZE start_pos = 0) const; | |
| 93 | |
| 94 const uint8_t* GetPtr() const { return m_Ptr; } | |
| 95 | |
| 96 const FX_CHAR* GetCStr() const { return (const FX_CHAR*)m_Ptr; } | |
| 97 | |
| 98 FX_STRSIZE GetLength() const { return m_Length; } | |
| 99 | |
| 100 bool IsEmpty() const { return m_Length == 0; } | |
| 101 | |
| 102 uint8_t GetAt(FX_STRSIZE index) const { return m_Ptr[index]; } | |
| 103 | |
| 104 CFX_ByteStringC Mid(FX_STRSIZE index, FX_STRSIZE count = -1) const { | |
| 105 if (index < 0) { | |
| 106 index = 0; | |
| 107 } | |
| 108 if (index > m_Length) { | |
| 109 return CFX_ByteStringC(); | |
| 110 } | |
| 111 if (count < 0 || count > m_Length - index) { | |
| 112 count = m_Length - index; | |
| 113 } | |
| 114 return CFX_ByteStringC(m_Ptr + index, count); | |
| 115 } | |
| 116 | |
| 117 const uint8_t& operator[](size_t index) const { return m_Ptr[index]; } | |
| 118 | |
| 119 bool operator<(const CFX_ByteStringC& that) const { | |
| 120 int result = memcmp(m_Ptr, that.m_Ptr, std::min(m_Length, that.m_Length)); | |
| 121 return result < 0 || (result == 0 && m_Length < that.m_Length); | |
| 122 } | |
| 123 | |
| 124 protected: | |
| 125 const uint8_t* m_Ptr; | |
| 126 FX_STRSIZE m_Length; | |
| 127 | |
| 128 private: | |
| 129 void* operator new(size_t) throw() { return NULL; } | |
| 130 }; | |
| 131 inline bool operator==(const char* lhs, const CFX_ByteStringC& rhs) { | |
| 132 return rhs == lhs; | |
| 133 } | |
| 134 inline bool operator!=(const char* lhs, const CFX_ByteStringC& rhs) { | |
| 135 return rhs != lhs; | |
| 136 } | |
| 137 #define FXBSTR_ID(c1, c2, c3, c4) ((c1 << 24) | (c2 << 16) | (c3 << 8) | (c4)) | |
| 138 | |
| 139 // A mutable string with shared buffers using copy-on-write semantics that | |
| 140 // avoids the cost of std::string's iterator stability guarantees. | |
| 141 class CFX_ByteString { | |
| 142 public: | |
| 143 typedef FX_CHAR value_type; | |
| 144 | |
| 145 CFX_ByteString() : m_pData(nullptr) {} | |
| 146 | |
| 147 // Copy constructor. | |
| 148 CFX_ByteString(const CFX_ByteString& str); | |
| 149 | |
| 150 // Move constructor. | |
| 151 inline CFX_ByteString(CFX_ByteString&& other) { | |
| 152 m_pData = other.m_pData; | |
| 153 other.m_pData = nullptr; | |
| 154 } | |
| 155 | |
| 156 CFX_ByteString(char ch); | |
| 157 CFX_ByteString(const FX_CHAR* ptr) | |
| 158 : CFX_ByteString(ptr, ptr ? FXSYS_strlen(ptr) : 0) {} | |
| 159 | |
| 160 CFX_ByteString(const FX_CHAR* ptr, FX_STRSIZE len); | |
| 161 CFX_ByteString(const uint8_t* ptr, FX_STRSIZE len); | |
| 162 | |
| 163 CFX_ByteString(const CFX_ByteStringC& bstrc); | |
| 164 CFX_ByteString(const CFX_ByteStringC& bstrc1, const CFX_ByteStringC& bstrc2); | |
| 165 | |
| 166 ~CFX_ByteString(); | |
| 167 | |
| 168 static CFX_ByteString FromUnicode(const FX_WCHAR* ptr, FX_STRSIZE len = -1); | |
| 169 | |
| 170 static CFX_ByteString FromUnicode(const CFX_WideString& str); | |
| 171 | |
| 172 // Explicit conversion to C-style string. | |
| 173 const FX_CHAR* c_str() const { return m_pData ? m_pData->m_String : ""; } | |
| 174 | |
| 175 // Implicit conversion to C-style string -- deprecated. | |
| 176 operator const FX_CHAR*() const { return m_pData ? m_pData->m_String : ""; } | |
| 177 | |
| 178 // Explicit conversion to uint8_t*. | |
| 179 const uint8_t* raw_str() const { | |
| 180 return m_pData ? reinterpret_cast<const uint8_t*>(m_pData->m_String) | |
| 181 : nullptr; | |
| 182 } | |
| 183 | |
| 184 // Implicit conversiont to uint8_t* -- deprecated. | |
| 185 operator const uint8_t*() const { | |
| 186 return m_pData ? reinterpret_cast<const uint8_t*>(m_pData->m_String) | |
| 187 : nullptr; | |
| 188 } | |
| 189 | |
| 190 FX_STRSIZE GetLength() const { return m_pData ? m_pData->m_nDataLength : 0; } | |
| 191 | |
| 192 bool IsEmpty() const { return !GetLength(); } | |
| 193 | |
| 194 int Compare(const CFX_ByteStringC& str) const; | |
| 195 | |
| 196 bool Equal(const char* ptr) const; | |
| 197 bool Equal(const CFX_ByteStringC& str) const; | |
| 198 bool Equal(const CFX_ByteString& other) const; | |
| 199 | |
| 200 bool EqualNoCase(const CFX_ByteStringC& str) const; | |
| 201 | |
| 202 bool operator==(const char* ptr) const { return Equal(ptr); } | |
| 203 bool operator==(const CFX_ByteStringC& str) const { return Equal(str); } | |
| 204 bool operator==(const CFX_ByteString& other) const { return Equal(other); } | |
| 205 | |
| 206 bool operator!=(const char* ptr) const { return !(*this == ptr); } | |
| 207 bool operator!=(const CFX_ByteStringC& str) const { return !(*this == str); } | |
| 208 bool operator!=(const CFX_ByteString& other) const { | |
| 209 return !(*this == other); | |
| 210 } | |
| 211 | |
| 212 bool operator<(const CFX_ByteString& str) const { | |
| 213 int result = FXSYS_memcmp(c_str(), str.c_str(), | |
| 214 std::min(GetLength(), str.GetLength())); | |
| 215 return result < 0 || (result == 0 && GetLength() < str.GetLength()); | |
| 216 } | |
| 217 | |
| 218 void Empty(); | |
| 219 | |
| 220 const CFX_ByteString& operator=(const FX_CHAR* str); | |
| 221 | |
| 222 const CFX_ByteString& operator=(const CFX_ByteStringC& bstrc); | |
| 223 | |
| 224 const CFX_ByteString& operator=(const CFX_ByteString& stringSrc); | |
| 225 | |
| 226 const CFX_ByteString& operator=(const CFX_BinaryBuf& buf); | |
| 227 | |
| 228 void Load(const uint8_t* str, FX_STRSIZE len); | |
| 229 | |
| 230 const CFX_ByteString& operator+=(FX_CHAR ch); | |
| 231 | |
| 232 const CFX_ByteString& operator+=(const FX_CHAR* str); | |
| 233 | |
| 234 const CFX_ByteString& operator+=(const CFX_ByteString& str); | |
| 235 | |
| 236 const CFX_ByteString& operator+=(const CFX_ByteStringC& bstrc); | |
| 237 | |
| 238 uint8_t GetAt(FX_STRSIZE nIndex) const { | |
| 239 return m_pData ? m_pData->m_String[nIndex] : 0; | |
| 240 } | |
| 241 | |
| 242 uint8_t operator[](FX_STRSIZE nIndex) const { | |
| 243 return m_pData ? m_pData->m_String[nIndex] : 0; | |
| 244 } | |
| 245 | |
| 246 void SetAt(FX_STRSIZE nIndex, FX_CHAR ch); | |
| 247 | |
| 248 FX_STRSIZE Insert(FX_STRSIZE index, FX_CHAR ch); | |
| 249 | |
| 250 FX_STRSIZE Delete(FX_STRSIZE index, FX_STRSIZE count = 1); | |
| 251 | |
| 252 void Format(const FX_CHAR* lpszFormat, ...); | |
| 253 | |
| 254 void FormatV(const FX_CHAR* lpszFormat, va_list argList); | |
| 255 | |
| 256 void Reserve(FX_STRSIZE len); | |
| 257 | |
| 258 FX_CHAR* GetBuffer(FX_STRSIZE len); | |
| 259 | |
| 260 void ReleaseBuffer(FX_STRSIZE len = -1); | |
| 261 | |
| 262 CFX_ByteString Mid(FX_STRSIZE first) const; | |
| 263 | |
| 264 CFX_ByteString Mid(FX_STRSIZE first, FX_STRSIZE count) const; | |
| 265 | |
| 266 CFX_ByteString Left(FX_STRSIZE count) const; | |
| 267 | |
| 268 CFX_ByteString Right(FX_STRSIZE count) const; | |
| 269 | |
| 270 FX_STRSIZE Find(const CFX_ByteStringC& lpszSub, FX_STRSIZE start = 0) const; | |
| 271 | |
| 272 FX_STRSIZE Find(FX_CHAR ch, FX_STRSIZE start = 0) const; | |
| 273 | |
| 274 FX_STRSIZE ReverseFind(FX_CHAR ch) const; | |
| 275 | |
| 276 void MakeLower(); | |
| 277 | |
| 278 void MakeUpper(); | |
| 279 | |
| 280 void TrimRight(); | |
| 281 | |
| 282 void TrimRight(FX_CHAR chTarget); | |
| 283 | |
| 284 void TrimRight(const CFX_ByteStringC& lpszTargets); | |
| 285 | |
| 286 void TrimLeft(); | |
| 287 | |
| 288 void TrimLeft(FX_CHAR chTarget); | |
| 289 | |
| 290 void TrimLeft(const CFX_ByteStringC& lpszTargets); | |
| 291 | |
| 292 FX_STRSIZE Replace(const CFX_ByteStringC& lpszOld, | |
| 293 const CFX_ByteStringC& lpszNew); | |
| 294 | |
| 295 FX_STRSIZE Remove(FX_CHAR ch); | |
| 296 | |
| 297 CFX_WideString UTF8Decode() const; | |
| 298 | |
| 299 FX_DWORD GetID(FX_STRSIZE start_pos = 0) const; | |
| 300 | |
| 301 #define FXFORMAT_SIGNED 1 | |
| 302 #define FXFORMAT_HEX 2 | |
| 303 #define FXFORMAT_CAPITAL 4 | |
| 304 | |
| 305 static CFX_ByteString FormatInteger(int i, FX_DWORD flags = 0); | |
| 306 static CFX_ByteString FormatFloat(FX_FLOAT f, int precision = 0); | |
| 307 | |
| 308 protected: | |
| 309 // To ensure ref counts do not overflow, consider the worst possible case: | |
| 310 // the entire address space contains nothing but pointers to this object. | |
| 311 // Since the count increments with each new pointer, the largest value is | |
| 312 // the number of pointers that can fit into the address space. The size of | |
| 313 // the address space itself is a good upper bound on it; we need not go | |
| 314 // larger. | |
| 315 class StringData { | |
| 316 public: | |
| 317 static StringData* Create(int nLen); | |
| 318 void Retain() { ++m_nRefs; } | |
| 319 void Release() { | |
| 320 if (--m_nRefs <= 0) | |
| 321 FX_Free(this); | |
| 322 } | |
| 323 | |
| 324 intptr_t m_nRefs; // Would prefer ssize_t, but no windows support. | |
| 325 FX_STRSIZE m_nDataLength; | |
| 326 FX_STRSIZE m_nAllocLength; | |
| 327 FX_CHAR m_String[1]; | |
| 328 | |
| 329 private: | |
| 330 StringData(FX_STRSIZE dataLen, FX_STRSIZE allocLen) | |
| 331 : m_nRefs(1), m_nDataLength(dataLen), m_nAllocLength(allocLen) { | |
| 332 FXSYS_assert(dataLen >= 0); | |
| 333 FXSYS_assert(allocLen >= 0); | |
| 334 FXSYS_assert(dataLen <= allocLen); | |
| 335 m_String[dataLen] = 0; | |
| 336 } | |
| 337 ~StringData() = delete; | |
| 338 }; | |
| 339 | |
| 340 void AllocCopy(CFX_ByteString& dest, | |
| 341 FX_STRSIZE nCopyLen, | |
| 342 FX_STRSIZE nCopyIndex) const; | |
| 343 void AssignCopy(FX_STRSIZE nSrcLen, const FX_CHAR* lpszSrcData); | |
| 344 void ConcatCopy(FX_STRSIZE nSrc1Len, | |
| 345 const FX_CHAR* lpszSrc1Data, | |
| 346 FX_STRSIZE nSrc2Len, | |
| 347 const FX_CHAR* lpszSrc2Data); | |
| 348 void ConcatInPlace(FX_STRSIZE nSrcLen, const FX_CHAR* lpszSrcData); | |
| 349 void CopyBeforeWrite(); | |
| 350 void AllocBeforeWrite(FX_STRSIZE nLen); | |
| 351 | |
| 352 StringData* m_pData; | |
| 353 friend class fxcrt_ByteStringConcatInPlace_Test; | |
| 354 }; | |
| 355 inline CFX_ByteStringC::CFX_ByteStringC(const CFX_ByteString& src) { | |
| 356 m_Ptr = (const uint8_t*)src; | |
| 357 m_Length = src.GetLength(); | |
| 358 } | |
| 359 inline CFX_ByteStringC& CFX_ByteStringC::operator=(const CFX_ByteString& src) { | |
| 360 m_Ptr = (const uint8_t*)src; | |
| 361 m_Length = src.GetLength(); | |
| 362 return *this; | |
| 363 } | |
| 364 | |
| 365 inline bool operator==(const char* lhs, const CFX_ByteString& rhs) { | |
| 366 return rhs == lhs; | |
| 367 } | |
| 368 inline bool operator==(const CFX_ByteStringC& lhs, const CFX_ByteString& rhs) { | |
| 369 return rhs == lhs; | |
| 370 } | |
| 371 inline bool operator!=(const char* lhs, const CFX_ByteString& rhs) { | |
| 372 return rhs != lhs; | |
| 373 } | |
| 374 inline bool operator!=(const CFX_ByteStringC& lhs, const CFX_ByteString& rhs) { | |
| 375 return rhs != lhs; | |
| 376 } | |
| 377 | |
| 378 inline CFX_ByteString operator+(const CFX_ByteStringC& str1, | |
| 379 const CFX_ByteStringC& str2) { | |
| 380 return CFX_ByteString(str1, str2); | |
| 381 } | |
| 382 inline CFX_ByteString operator+(const CFX_ByteStringC& str1, | |
| 383 const FX_CHAR* str2) { | |
| 384 return CFX_ByteString(str1, str2); | |
| 385 } | |
| 386 inline CFX_ByteString operator+(const FX_CHAR* str1, | |
| 387 const CFX_ByteStringC& str2) { | |
| 388 return CFX_ByteString(str1, str2); | |
| 389 } | |
| 390 inline CFX_ByteString operator+(const CFX_ByteStringC& str1, FX_CHAR ch) { | |
| 391 return CFX_ByteString(str1, CFX_ByteStringC(ch)); | |
| 392 } | |
| 393 inline CFX_ByteString operator+(FX_CHAR ch, const CFX_ByteStringC& str2) { | |
| 394 return CFX_ByteString(ch, str2); | |
| 395 } | |
| 396 inline CFX_ByteString operator+(const CFX_ByteString& str1, | |
| 397 const CFX_ByteString& str2) { | |
| 398 return CFX_ByteString(str1, str2); | |
| 399 } | |
| 400 inline CFX_ByteString operator+(const CFX_ByteString& str1, FX_CHAR ch) { | |
| 401 return CFX_ByteString(str1, CFX_ByteStringC(ch)); | |
| 402 } | |
| 403 inline CFX_ByteString operator+(FX_CHAR ch, const CFX_ByteString& str2) { | |
| 404 return CFX_ByteString(ch, str2); | |
| 405 } | |
| 406 inline CFX_ByteString operator+(const CFX_ByteString& str1, | |
| 407 const FX_CHAR* str2) { | |
| 408 return CFX_ByteString(str1, str2); | |
| 409 } | |
| 410 inline CFX_ByteString operator+(const FX_CHAR* str1, | |
| 411 const CFX_ByteString& str2) { | |
| 412 return CFX_ByteString(str1, str2); | |
| 413 } | |
| 414 inline CFX_ByteString operator+(const CFX_ByteString& str1, | |
| 415 const CFX_ByteStringC& str2) { | |
| 416 return CFX_ByteString(str1, str2); | |
| 417 } | |
| 418 inline CFX_ByteString operator+(const CFX_ByteStringC& str1, | |
| 419 const CFX_ByteString& str2) { | |
| 420 return CFX_ByteString(str1, str2); | |
| 421 } | |
| 422 class CFX_WideStringC { | |
| 423 public: | |
| 424 typedef FX_WCHAR value_type; | |
| 425 | |
| 426 CFX_WideStringC() { | |
| 427 m_Ptr = NULL; | |
| 428 m_Length = 0; | |
| 429 } | |
| 430 | |
| 431 CFX_WideStringC(const FX_WCHAR* ptr) { | |
| 432 m_Ptr = ptr; | |
| 433 m_Length = ptr ? FXSYS_wcslen(ptr) : 0; | |
| 434 } | |
| 435 | |
| 436 CFX_WideStringC(FX_WCHAR& ch) { | |
| 437 m_Ptr = &ch; | |
| 438 m_Length = 1; | |
| 439 } | |
| 440 | |
| 441 CFX_WideStringC(const FX_WCHAR* ptr, FX_STRSIZE len) { | |
| 442 m_Ptr = ptr; | |
| 443 m_Length = (len == -1) ? FXSYS_wcslen(ptr) : len; | |
| 444 } | |
| 445 | |
| 446 CFX_WideStringC(const CFX_WideStringC& src) { | |
| 447 m_Ptr = src.m_Ptr; | |
| 448 m_Length = src.m_Length; | |
| 449 } | |
| 450 | |
| 451 CFX_WideStringC(const CFX_WideString& src); | |
| 452 | |
| 453 CFX_WideStringC& operator=(const FX_WCHAR* src) { | |
| 454 m_Ptr = src; | |
| 455 m_Length = FXSYS_wcslen(src); | |
| 456 return *this; | |
| 457 } | |
| 458 | |
| 459 CFX_WideStringC& operator=(const CFX_WideStringC& src) { | |
| 460 m_Ptr = src.m_Ptr; | |
| 461 m_Length = src.m_Length; | |
| 462 return *this; | |
| 463 } | |
| 464 | |
| 465 CFX_WideStringC& operator=(const CFX_WideString& src); | |
| 466 | |
| 467 bool operator==(const wchar_t* ptr) const { | |
| 468 return FXSYS_wcslen(ptr) == m_Length && wmemcmp(ptr, m_Ptr, m_Length) == 0; | |
| 469 } | |
| 470 bool operator==(const CFX_WideStringC& str) const { | |
| 471 return str.m_Length == m_Length && wmemcmp(str.m_Ptr, m_Ptr, m_Length) == 0; | |
| 472 } | |
| 473 bool operator!=(const wchar_t* ptr) const { return !(*this == ptr); } | |
| 474 bool operator!=(const CFX_WideStringC& str) const { return !(*this == str); } | |
| 475 | |
| 476 const FX_WCHAR* GetPtr() const { return m_Ptr; } | |
| 477 | |
| 478 FX_STRSIZE GetLength() const { return m_Length; } | |
| 479 | |
| 480 bool IsEmpty() const { return m_Length == 0; } | |
| 481 | |
| 482 FX_WCHAR GetAt(FX_STRSIZE index) const { return m_Ptr[index]; } | |
| 483 | |
| 484 CFX_WideStringC Left(FX_STRSIZE count) const { | |
| 485 if (count < 1) { | |
| 486 return CFX_WideStringC(); | |
| 487 } | |
| 488 if (count > m_Length) { | |
| 489 count = m_Length; | |
| 490 } | |
| 491 return CFX_WideStringC(m_Ptr, count); | |
| 492 } | |
| 493 | |
| 494 CFX_WideStringC Mid(FX_STRSIZE index, FX_STRSIZE count = -1) const { | |
| 495 if (index < 0) { | |
| 496 index = 0; | |
| 497 } | |
| 498 if (index > m_Length) { | |
| 499 return CFX_WideStringC(); | |
| 500 } | |
| 501 if (count < 0 || count > m_Length - index) { | |
| 502 count = m_Length - index; | |
| 503 } | |
| 504 return CFX_WideStringC(m_Ptr + index, count); | |
| 505 } | |
| 506 | |
| 507 CFX_WideStringC Right(FX_STRSIZE count) const { | |
| 508 if (count < 1) { | |
| 509 return CFX_WideStringC(); | |
| 510 } | |
| 511 if (count > m_Length) { | |
| 512 count = m_Length; | |
| 513 } | |
| 514 return CFX_WideStringC(m_Ptr + m_Length - count, count); | |
| 515 } | |
| 516 | |
| 517 const FX_WCHAR& operator[](size_t index) const { return m_Ptr[index]; } | |
| 518 | |
| 519 bool operator<(const CFX_WideStringC& that) const { | |
| 520 int result = wmemcmp(m_Ptr, that.m_Ptr, std::min(m_Length, that.m_Length)); | |
| 521 return result < 0 || (result == 0 && m_Length < that.m_Length); | |
| 522 } | |
| 523 | |
| 524 protected: | |
| 525 const FX_WCHAR* m_Ptr; | |
| 526 FX_STRSIZE m_Length; | |
| 527 | |
| 528 private: | |
| 529 void* operator new(size_t) throw() { return NULL; } | |
| 530 }; | |
| 531 inline bool operator==(const wchar_t* lhs, const CFX_WideStringC& rhs) { | |
| 532 return rhs == lhs; | |
| 533 } | |
| 534 inline bool operator!=(const wchar_t* lhs, const CFX_WideStringC& rhs) { | |
| 535 return rhs != lhs; | |
| 536 } | |
| 537 #define FX_WSTRC(wstr) CFX_WideStringC(wstr, FX_ArraySize(wstr) - 1) | |
| 538 | |
| 539 // A mutable string with shared buffers using copy-on-write semantics that | |
| 540 // avoids the cost of std::string's iterator stability guarantees. | |
| 541 class CFX_WideString { | |
| 542 public: | |
| 543 typedef FX_WCHAR value_type; | |
| 544 | |
| 545 CFX_WideString() : m_pData(nullptr) {} | |
| 546 | |
| 547 // Copy constructor. | |
| 548 CFX_WideString(const CFX_WideString& str); | |
| 549 | |
| 550 // Move constructor. | |
| 551 inline CFX_WideString(CFX_WideString&& other) { | |
| 552 m_pData = other.m_pData; | |
| 553 other.m_pData = nullptr; | |
| 554 } | |
| 555 | |
| 556 CFX_WideString(const FX_WCHAR* ptr) | |
| 557 : CFX_WideString(ptr, ptr ? FXSYS_wcslen(ptr) : 0) {} | |
| 558 | |
| 559 CFX_WideString(const FX_WCHAR* ptr, FX_STRSIZE len); | |
| 560 | |
| 561 CFX_WideString(FX_WCHAR ch); | |
| 562 | |
| 563 CFX_WideString(const CFX_WideStringC& str); | |
| 564 | |
| 565 CFX_WideString(const CFX_WideStringC& str1, const CFX_WideStringC& str2); | |
| 566 | |
| 567 ~CFX_WideString(); | |
| 568 | |
| 569 static CFX_WideString FromLocal(const CFX_ByteString& str); | |
| 570 | |
| 571 static CFX_WideString FromCodePage(const CFX_ByteString& str, | |
| 572 uint16_t codepage); | |
| 573 | |
| 574 static CFX_WideString FromUTF8(const char* str, FX_STRSIZE len); | |
| 575 | |
| 576 static CFX_WideString FromUTF16LE(const unsigned short* str, FX_STRSIZE len); | |
| 577 | |
| 578 static FX_STRSIZE WStringLength(const unsigned short* str); | |
| 579 | |
| 580 // Explicit conversion to C-style wide string. | |
| 581 const FX_WCHAR* c_str() const { return m_pData ? m_pData->m_String : L""; } | |
| 582 | |
| 583 // Implicit conversion to C-style wide string -- deprecated. | |
| 584 operator const FX_WCHAR*() const { return m_pData ? m_pData->m_String : L""; } | |
| 585 | |
| 586 void Empty(); | |
| 587 | |
| 588 bool IsEmpty() const { return !GetLength(); } | |
| 589 | |
| 590 FX_STRSIZE GetLength() const { return m_pData ? m_pData->m_nDataLength : 0; } | |
| 591 | |
| 592 const CFX_WideString& operator=(const FX_WCHAR* str); | |
| 593 | |
| 594 const CFX_WideString& operator=(const CFX_WideString& stringSrc); | |
| 595 | |
| 596 const CFX_WideString& operator=(const CFX_WideStringC& stringSrc); | |
| 597 | |
| 598 const CFX_WideString& operator+=(const FX_WCHAR* str); | |
| 599 | |
| 600 const CFX_WideString& operator+=(FX_WCHAR ch); | |
| 601 | |
| 602 const CFX_WideString& operator+=(const CFX_WideString& str); | |
| 603 | |
| 604 const CFX_WideString& operator+=(const CFX_WideStringC& str); | |
| 605 | |
| 606 bool operator==(const wchar_t* ptr) const { return Equal(ptr); } | |
| 607 bool operator==(const CFX_WideStringC& str) const { return Equal(str); } | |
| 608 bool operator==(const CFX_WideString& other) const { return Equal(other); } | |
| 609 | |
| 610 bool operator!=(const wchar_t* ptr) const { return !(*this == ptr); } | |
| 611 bool operator!=(const CFX_WideStringC& str) const { return !(*this == str); } | |
| 612 bool operator!=(const CFX_WideString& other) const { | |
| 613 return !(*this == other); | |
| 614 } | |
| 615 | |
| 616 bool operator<(const CFX_WideString& str) const { | |
| 617 int result = | |
| 618 wmemcmp(c_str(), str.c_str(), std::min(GetLength(), str.GetLength())); | |
| 619 return result < 0 || (result == 0 && GetLength() < str.GetLength()); | |
| 620 } | |
| 621 | |
| 622 FX_WCHAR GetAt(FX_STRSIZE nIndex) const { | |
| 623 return m_pData ? m_pData->m_String[nIndex] : 0; | |
| 624 } | |
| 625 | |
| 626 FX_WCHAR operator[](FX_STRSIZE nIndex) const { | |
| 627 return m_pData ? m_pData->m_String[nIndex] : 0; | |
| 628 } | |
| 629 | |
| 630 void SetAt(FX_STRSIZE nIndex, FX_WCHAR ch); | |
| 631 | |
| 632 int Compare(const FX_WCHAR* str) const; | |
| 633 | |
| 634 int Compare(const CFX_WideString& str) const; | |
| 635 | |
| 636 int CompareNoCase(const FX_WCHAR* str) const; | |
| 637 | |
| 638 bool Equal(const wchar_t* ptr) const; | |
| 639 bool Equal(const CFX_WideStringC& str) const; | |
| 640 bool Equal(const CFX_WideString& other) const; | |
| 641 | |
| 642 CFX_WideString Mid(FX_STRSIZE first) const; | |
| 643 | |
| 644 CFX_WideString Mid(FX_STRSIZE first, FX_STRSIZE count) const; | |
| 645 | |
| 646 CFX_WideString Left(FX_STRSIZE count) const; | |
| 647 | |
| 648 CFX_WideString Right(FX_STRSIZE count) const; | |
| 649 | |
| 650 FX_STRSIZE Insert(FX_STRSIZE index, FX_WCHAR ch); | |
| 651 | |
| 652 FX_STRSIZE Delete(FX_STRSIZE index, FX_STRSIZE count = 1); | |
| 653 | |
| 654 void Format(const FX_WCHAR* lpszFormat, ...); | |
| 655 | |
| 656 void FormatV(const FX_WCHAR* lpszFormat, va_list argList); | |
| 657 | |
| 658 void MakeLower(); | |
| 659 | |
| 660 void MakeUpper(); | |
| 661 | |
| 662 void TrimRight(); | |
| 663 | |
| 664 void TrimRight(FX_WCHAR chTarget); | |
| 665 | |
| 666 void TrimRight(const FX_WCHAR* lpszTargets); | |
| 667 | |
| 668 void TrimLeft(); | |
| 669 | |
| 670 void TrimLeft(FX_WCHAR chTarget); | |
| 671 | |
| 672 void TrimLeft(const FX_WCHAR* lpszTargets); | |
| 673 | |
| 674 void Reserve(FX_STRSIZE len); | |
| 675 | |
| 676 FX_WCHAR* GetBuffer(FX_STRSIZE len); | |
| 677 | |
| 678 void ReleaseBuffer(FX_STRSIZE len = -1); | |
| 679 | |
| 680 int GetInteger() const; | |
| 681 | |
| 682 FX_FLOAT GetFloat() const; | |
| 683 | |
| 684 FX_STRSIZE Find(const FX_WCHAR* lpszSub, FX_STRSIZE start = 0) const; | |
| 685 | |
| 686 FX_STRSIZE Find(FX_WCHAR ch, FX_STRSIZE start = 0) const; | |
| 687 | |
| 688 FX_STRSIZE Replace(const FX_WCHAR* lpszOld, const FX_WCHAR* lpszNew); | |
| 689 | |
| 690 FX_STRSIZE Remove(FX_WCHAR ch); | |
| 691 | |
| 692 CFX_ByteString UTF8Encode() const; | |
| 693 | |
| 694 CFX_ByteString UTF16LE_Encode() const; | |
| 695 | |
| 696 protected: | |
| 697 class StringData { | |
| 698 public: | |
| 699 static StringData* Create(int nLen); | |
| 700 void Retain() { ++m_nRefs; } | |
| 701 void Release() { | |
| 702 if (--m_nRefs <= 0) | |
| 703 FX_Free(this); | |
| 704 } | |
| 705 | |
| 706 intptr_t m_nRefs; // Would prefer ssize_t, but no windows support. | |
| 707 FX_STRSIZE m_nDataLength; | |
| 708 FX_STRSIZE m_nAllocLength; | |
| 709 FX_WCHAR m_String[1]; | |
| 710 | |
| 711 private: | |
| 712 StringData(FX_STRSIZE dataLen, FX_STRSIZE allocLen) | |
| 713 : m_nRefs(1), m_nDataLength(dataLen), m_nAllocLength(allocLen) { | |
| 714 FXSYS_assert(dataLen >= 0); | |
| 715 FXSYS_assert(allocLen >= 0); | |
| 716 FXSYS_assert(dataLen <= allocLen); | |
| 717 m_String[dataLen] = 0; | |
| 718 } | |
| 719 ~StringData() = delete; | |
| 720 }; | |
| 721 | |
| 722 void CopyBeforeWrite(); | |
| 723 void AllocBeforeWrite(FX_STRSIZE nLen); | |
| 724 void ConcatInPlace(FX_STRSIZE nSrcLen, const FX_WCHAR* lpszSrcData); | |
| 725 void ConcatCopy(FX_STRSIZE nSrc1Len, | |
| 726 const FX_WCHAR* lpszSrc1Data, | |
| 727 FX_STRSIZE nSrc2Len, | |
| 728 const FX_WCHAR* lpszSrc2Data); | |
| 729 void AssignCopy(FX_STRSIZE nSrcLen, const FX_WCHAR* lpszSrcData); | |
| 730 void AllocCopy(CFX_WideString& dest, | |
| 731 FX_STRSIZE nCopyLen, | |
| 732 FX_STRSIZE nCopyIndex) const; | |
| 733 | |
| 734 StringData* m_pData; | |
| 735 friend class fxcrt_WideStringConcatInPlace_Test; | |
| 736 }; | |
| 737 inline CFX_WideStringC::CFX_WideStringC(const CFX_WideString& src) { | |
| 738 m_Ptr = src.c_str(); | |
| 739 m_Length = src.GetLength(); | |
| 740 } | |
| 741 inline CFX_WideStringC& CFX_WideStringC::operator=(const CFX_WideString& src) { | |
| 742 m_Ptr = src.c_str(); | |
| 743 m_Length = src.GetLength(); | |
| 744 return *this; | |
| 745 } | |
| 746 | |
| 747 inline CFX_WideString operator+(const CFX_WideStringC& str1, | |
| 748 const CFX_WideStringC& str2) { | |
| 749 return CFX_WideString(str1, str2); | |
| 750 } | |
| 751 inline CFX_WideString operator+(const CFX_WideStringC& str1, | |
| 752 const FX_WCHAR* str2) { | |
| 753 return CFX_WideString(str1, str2); | |
| 754 } | |
| 755 inline CFX_WideString operator+(const FX_WCHAR* str1, | |
| 756 const CFX_WideStringC& str2) { | |
| 757 return CFX_WideString(str1, str2); | |
| 758 } | |
| 759 inline CFX_WideString operator+(const CFX_WideStringC& str1, FX_WCHAR ch) { | |
| 760 return CFX_WideString(str1, CFX_WideStringC(ch)); | |
| 761 } | |
| 762 inline CFX_WideString operator+(FX_WCHAR ch, const CFX_WideStringC& str2) { | |
| 763 return CFX_WideString(ch, str2); | |
| 764 } | |
| 765 inline CFX_WideString operator+(const CFX_WideString& str1, | |
| 766 const CFX_WideString& str2) { | |
| 767 return CFX_WideString(str1, str2); | |
| 768 } | |
| 769 inline CFX_WideString operator+(const CFX_WideString& str1, FX_WCHAR ch) { | |
| 770 return CFX_WideString(str1, CFX_WideStringC(ch)); | |
| 771 } | |
| 772 inline CFX_WideString operator+(FX_WCHAR ch, const CFX_WideString& str2) { | |
| 773 return CFX_WideString(ch, str2); | |
| 774 } | |
| 775 inline CFX_WideString operator+(const CFX_WideString& str1, | |
| 776 const FX_WCHAR* str2) { | |
| 777 return CFX_WideString(str1, str2); | |
| 778 } | |
| 779 inline CFX_WideString operator+(const FX_WCHAR* str1, | |
| 780 const CFX_WideString& str2) { | |
| 781 return CFX_WideString(str1, str2); | |
| 782 } | |
| 783 inline CFX_WideString operator+(const CFX_WideString& str1, | |
| 784 const CFX_WideStringC& str2) { | |
| 785 return CFX_WideString(str1, str2); | |
| 786 } | |
| 787 inline CFX_WideString operator+(const CFX_WideStringC& str1, | |
| 788 const CFX_WideString& str2) { | |
| 789 return CFX_WideString(str1, str2); | |
| 790 } | |
| 791 inline bool operator==(const wchar_t* lhs, const CFX_WideString& rhs) { | |
| 792 return rhs == lhs; | |
| 793 } | |
| 794 inline bool operator==(const CFX_WideStringC& lhs, const CFX_WideString& rhs) { | |
| 795 return rhs == lhs; | |
| 796 } | |
| 797 inline bool operator!=(const wchar_t* lhs, const CFX_WideString& rhs) { | |
| 798 return rhs != lhs; | |
| 799 } | |
| 800 inline bool operator!=(const CFX_WideStringC& lhs, const CFX_WideString& rhs) { | |
| 801 return rhs != lhs; | |
| 802 } | |
| 803 | |
| 804 CFX_ByteString FX_UTF8Encode(const FX_WCHAR* pwsStr, FX_STRSIZE len); | |
| 805 inline CFX_ByteString FX_UTF8Encode(const CFX_WideStringC& wsStr) { | |
| 806 return FX_UTF8Encode(wsStr.GetPtr(), wsStr.GetLength()); | |
| 807 } | |
| 808 inline CFX_ByteString FX_UTF8Encode(const CFX_WideString& wsStr) { | |
| 809 return FX_UTF8Encode(wsStr.c_str(), wsStr.GetLength()); | |
| 810 } | |
| 811 | |
| 812 FX_FLOAT FX_atof(const CFX_ByteStringC& str); | |
| 813 inline FX_FLOAT FX_atof(const CFX_WideStringC& wsStr) { | |
| 814 return FX_atof(FX_UTF8Encode(wsStr.GetPtr(), wsStr.GetLength())); | |
| 815 } | |
| 816 void FX_atonum(const CFX_ByteStringC& str, FX_BOOL& bInteger, void* pData); | |
| 817 FX_STRSIZE FX_ftoa(FX_FLOAT f, FX_CHAR* buf); | |
| 818 | |
| 819 #endif // CORE_INCLUDE_FXCRT_FX_STRING_H_ | |
| OLD | NEW |
|---|
Chromium Code Reviews
Issue 1825953002:
Move core/include/fxcrt to core/fxcrt/include. (Closed)
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