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juce_CharPointer_UTF16.h
1/*
2 ==============================================================================
3
4 This file is part of the JUCE library.
5 Copyright (c) 2017 - ROLI Ltd.
6
7 JUCE is an open source library subject to commercial or open-source
8 licensing.
9
10 The code included in this file is provided under the terms of the ISC license
11 http://www.isc.org/downloads/software-support-policy/isc-license. Permission
12 To use, copy, modify, and/or distribute this software for any purpose with or
13 without fee is hereby granted provided that the above copyright notice and
14 this permission notice appear in all copies.
15
16 JUCE IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL WARRANTIES, WHETHER
17 EXPRESSED OR IMPLIED, INCLUDING MERCHANTABILITY AND FITNESS FOR PURPOSE, ARE
18 DISCLAIMED.
19
20 ==============================================================================
21*/
22
23namespace juce
24{
25
26//==============================================================================
35{
36public:
37 #if JUCE_NATIVE_WCHAR_IS_UTF16
38 using CharType = wchar_t;
39 #else
40 using CharType = int16;
41 #endif
42
43 inline explicit CharPointer_UTF16 (const CharType* rawPointer) noexcept
44 : data (const_cast<CharType*> (rawPointer))
45 {
46 }
47
48 inline CharPointer_UTF16 (const CharPointer_UTF16& other) = default;
49
51 {
52 data = other.data;
53 return *this;
54 }
55
56 inline CharPointer_UTF16 operator= (const CharType* text) noexcept
57 {
58 data = const_cast<CharType*> (text);
59 return *this;
60 }
61
63 inline bool operator== (CharPointer_UTF16 other) const noexcept { return data == other.data; }
64 inline bool operator!= (CharPointer_UTF16 other) const noexcept { return data != other.data; }
65 inline bool operator<= (CharPointer_UTF16 other) const noexcept { return data <= other.data; }
66 inline bool operator< (CharPointer_UTF16 other) const noexcept { return data < other.data; }
67 inline bool operator>= (CharPointer_UTF16 other) const noexcept { return data >= other.data; }
68 inline bool operator> (CharPointer_UTF16 other) const noexcept { return data > other.data; }
69
71 inline CharType* getAddress() const noexcept { return data; }
72
74 inline operator const CharType*() const noexcept { return data; }
75
77 inline bool isEmpty() const noexcept { return *data == 0; }
78
80 inline bool isNotEmpty() const noexcept { return *data != 0; }
81
84 {
85 auto n = (uint32) (uint16) *data;
86
87 if (n >= 0xd800 && n <= 0xdfff && ((uint32) (uint16) data[1]) >= 0xdc00)
88 n = 0x10000 + (((n - 0xd800) << 10) | (((uint32) (uint16) data[1]) - 0xdc00));
89
90 return (juce_wchar) n;
91 }
92
95 {
96 auto n = (uint32) (uint16) *data++;
97
98 if (n >= 0xd800 && n <= 0xdfff && ((uint32) (uint16) *data) >= 0xdc00)
99 ++data;
100
101 return *this;
102 }
103
106 {
107 auto n = (uint32) (uint16) (*--data);
108
109 if (n >= 0xdc00 && n <= 0xdfff)
110 --data;
111
112 return *this;
113 }
114
118 {
119 auto n = (uint32) (uint16) *data++;
120
121 if (n >= 0xd800 && n <= 0xdfff && ((uint32) (uint16) *data) >= 0xdc00)
122 n = 0x10000 + ((((n - 0xd800) << 10) | (((uint32) (uint16) *data++) - 0xdc00)));
123
124 return (juce_wchar) n;
125 }
126
129 {
130 auto temp (*this);
131 ++*this;
132 return temp;
133 }
134
136 void operator+= (int numToSkip) noexcept
137 {
138 if (numToSkip < 0)
139 {
140 while (++numToSkip <= 0)
141 --*this;
142 }
143 else
144 {
145 while (--numToSkip >= 0)
146 ++*this;
147 }
148 }
149
151 void operator-= (int numToSkip) noexcept
152 {
154 }
155
158 {
159 auto p (*this);
160 p += characterIndex;
161 return *p;
162 }
163
166 {
167 auto p (*this);
168 p += numToSkip;
169 return p;
170 }
171
174 {
175 auto p (*this);
176 p += -numToSkip;
177 return p;
178 }
179
182 {
183 if (charToWrite >= 0x10000)
184 {
185 charToWrite -= 0x10000;
186 *data++ = (CharType) (0xd800 + (charToWrite >> 10));
187 *data++ = (CharType) (0xdc00 + (charToWrite & 0x3ff));
188 }
189 else
190 {
191 *data++ = (CharType) charToWrite;
192 }
193 }
194
197 {
198 *data = 0;
199 }
200
203 {
204 auto* d = data;
205 size_t count = 0;
206
207 for (;;)
208 {
209 auto n = (uint32) (uint16) *d++;
210
211 if (n >= 0xd800 && n <= 0xdfff)
212 {
213 if (*d++ == 0)
214 break;
215 }
216 else if (n == 0)
217 break;
218
219 ++count;
220 }
221
222 return count;
223 }
224
226 size_t lengthUpTo (size_t maxCharsToCount) const noexcept
227 {
229 }
230
232 size_t lengthUpTo (CharPointer_UTF16 end) const noexcept
233 {
234 return CharacterFunctions::lengthUpTo (*this, end);
235 }
236
241 {
242 return sizeof (CharType) * (findNullIndex (data) + 1);
243 }
244
249 {
250 return (charToWrite >= 0x10000) ? (sizeof (CharType) * 2) : sizeof (CharType);
251 }
252
257 template <class CharPointer>
258 static size_t getBytesRequiredFor (CharPointer text) noexcept
259 {
260 size_t count = 0;
261 juce_wchar n;
262
263 while ((n = text.getAndAdvance()) != 0)
264 count += getBytesRequiredFor (n);
265
266 return count;
267 }
268
271 {
272 auto* t = data;
273
274 while (*t != 0)
275 ++t;
276
277 return CharPointer_UTF16 (t);
278 }
279
281 template <typename CharPointer>
282 void writeAll (CharPointer src) noexcept
283 {
285 }
286
289 {
290 auto* s = src.data;
291
292 while ((*data = *s) != 0)
293 {
294 ++data;
295 ++s;
296 }
297 }
298
303 template <typename CharPointer>
308
313 template <typename CharPointer>
318
320 template <typename CharPointer>
321 int compare (CharPointer other) const noexcept
322 {
323 return CharacterFunctions::compare (*this, other);
324 }
325
327 template <typename CharPointer>
328 int compareUpTo (CharPointer other, int maxChars) const noexcept
329 {
331 }
332
334 template <typename CharPointer>
336 {
338 }
339
341 template <typename CharPointer>
346
347 #if JUCE_MSVC && ! DOXYGEN
348 int compareIgnoreCase (CharPointer_UTF16 other) const noexcept
349 {
350 return _wcsicmp (data, other.data);
351 }
352
353 int compareIgnoreCaseUpTo (CharPointer_UTF16 other, int maxChars) const noexcept
354 {
355 return _wcsnicmp (data, other.data, (size_t) maxChars);
356 }
357
358 int indexOf (CharPointer_UTF16 stringToFind) const noexcept
359 {
360 const CharType* const t = wcsstr (data, stringToFind.getAddress());
361 return t == nullptr ? -1 : (int) (t - data);
362 }
363 #endif
364
366 template <typename CharPointer>
367 int indexOf (CharPointer stringToFind) const noexcept
368 {
370 }
371
373 int indexOf (juce_wchar charToFind) const noexcept
374 {
376 }
377
379 int indexOf (juce_wchar charToFind, bool ignoreCase) const noexcept
380 {
381 return ignoreCase ? CharacterFunctions::indexOfCharIgnoreCase (*this, charToFind)
383 }
384
386 bool isWhitespace() const noexcept { return CharacterFunctions::isWhitespace (operator*()) != 0; }
388 bool isDigit() const noexcept { return CharacterFunctions::isDigit (operator*()) != 0; }
390 bool isLetter() const noexcept { return CharacterFunctions::isLetter (operator*()) != 0; }
394 bool isUpperCase() const noexcept { return CharacterFunctions::isUpperCase (operator*()) != 0; }
396 bool isLowerCase() const noexcept { return CharacterFunctions::isLowerCase (operator*()) != 0; }
397
402
405 {
406 #if JUCE_MSVC
407 return _wtoi (data);
408 #else
409 return CharacterFunctions::getIntValue<int, CharPointer_UTF16> (*this);
410 #endif
411 }
412
415 {
416 #if JUCE_MSVC
417 return _wtoi64 (data);
418 #else
419 return CharacterFunctions::getIntValue<int64, CharPointer_UTF16> (*this);
420 #endif
421 }
422
425
428
430 static bool canRepresent (juce_wchar character) noexcept
431 {
432 auto n = (uint32) character;
433 return n < 0x10ffff && (n < 0xd800 || n > 0xdfff);
434 }
435
437 static bool isValidString (const CharType* dataToTest, int maxBytesToRead)
438 {
439 maxBytesToRead /= (int) sizeof (CharType);
440
441 while (--maxBytesToRead >= 0 && *dataToTest != 0)
442 {
443 auto n = (uint32) (uint16) *dataToTest++;
444
445 if (n >= 0xd800)
446 {
447 if (n > 0x10ffff)
448 return false;
449
450 if (n <= 0xdfff)
451 {
452 if (n > 0xdc00)
453 return false;
454
455 auto nextChar = (uint32) (uint16) *dataToTest++;
456
458 return false;
459 }
460 }
461 }
462
463 return true;
464 }
465
468 {
469 return CharPointer_UTF16 (reinterpret_cast<Atomic<CharType*>&> (data).exchange (newValue.data));
470 }
471
473 enum
474 {
475 byteOrderMarkBE1 = 0xfe,
476 byteOrderMarkBE2 = 0xff,
477 byteOrderMarkLE1 = 0xff,
478 byteOrderMarkLE2 = 0xfe
479 };
480
484 static bool isByteOrderMarkBigEndian (const void* possibleByteOrder) noexcept
485 {
486 jassert (possibleByteOrder != nullptr);
487 auto c = static_cast<const uint8*> (possibleByteOrder);
488
489 return c[0] == (uint8) byteOrderMarkBE1
490 && c[1] == (uint8) byteOrderMarkBE2;
491 }
492
496 static bool isByteOrderMarkLittleEndian (const void* possibleByteOrder) noexcept
497 {
498 jassert (possibleByteOrder != nullptr);
499 auto c = static_cast<const uint8*> (possibleByteOrder);
500
501 return c[0] == (uint8) byteOrderMarkLE1
502 && c[1] == (uint8) byteOrderMarkLE2;
503 }
504
505private:
506 CharType* data;
507
508 static unsigned int findNullIndex (const CharType* t) noexcept
509 {
510 unsigned int n = 0;
511
512 while (t[n] != 0)
513 ++n;
514
515 return n;
516 }
517};
518
519} // namespace juce
ElementType * data() noexcept
Definition juce_Array.h:360
juce_wchar toUpperCase() const noexcept
int getIntValue32() const noexcept
juce_wchar operator*() const noexcept
CharPointer_UTF16 operator-(int numToSkip) const noexcept
bool isNotEmpty() const noexcept
CharPointer_UTF16 operator++() noexcept
size_t writeWithDestByteLimit(CharPointer src, size_t maxDestBytes) noexcept
static size_t getBytesRequiredFor(juce_wchar charToWrite) noexcept
void writeAll(CharPointer src) noexcept
static bool canRepresent(juce_wchar character) noexcept
bool operator==(CharPointer_UTF16 other) const noexcept
void writeNull() const noexcept
juce_wchar toLowerCase() const noexcept
bool isUpperCase() const noexcept
int compareIgnoreCaseUpTo(CharPointer other, int maxChars) const noexcept
int64 getIntValue64() const noexcept
int compare(CharPointer other) const noexcept
bool isLetter() const noexcept
size_t lengthUpTo(size_t maxCharsToCount) const noexcept
CharPointer_UTF16 atomicSwap(CharPointer_UTF16 newValue)
static size_t getBytesRequiredFor(CharPointer text) noexcept
CharPointer_UTF16 operator--() noexcept
juce_wchar operator[](int characterIndex) const noexcept
double getDoubleValue() const noexcept
size_t length() const noexcept
CharPointer_UTF16 findTerminatingNull() const noexcept
size_t lengthUpTo(CharPointer_UTF16 end) const noexcept
int compareIgnoreCase(CharPointer other) const noexcept
CharType * getAddress() const noexcept
size_t sizeInBytes() const noexcept
static bool isByteOrderMarkBigEndian(const void *possibleByteOrder) noexcept
CharPointer_UTF16 operator+(int numToSkip) const noexcept
CharPointer_UTF16 findEndOfWhitespace() const noexcept
juce_wchar getAndAdvance() noexcept
bool isDigit() const noexcept
int compareUpTo(CharPointer other, int maxChars) const noexcept
void writeAll(CharPointer_UTF16 src) noexcept
bool isLowerCase() const noexcept
bool isEmpty() const noexcept
int indexOf(juce_wchar charToFind) const noexcept
void writeWithCharLimit(CharPointer src, int maxChars) noexcept
bool isLetterOrDigit() const noexcept
int indexOf(CharPointer stringToFind) const noexcept
void write(juce_wchar charToWrite) noexcept
static bool isValidString(const CharType *dataToTest, int maxBytesToRead)
bool isWhitespace() const noexcept
void operator-=(int numToSkip) noexcept
static bool isByteOrderMarkLittleEndian(const void *possibleByteOrder) noexcept
void operator+=(int numToSkip) noexcept
int indexOf(juce_wchar charToFind, bool ignoreCase) const noexcept
static int compare(juce_wchar char1, juce_wchar char2) noexcept
static juce_wchar toLowerCase(juce_wchar character) noexcept
static size_t copyWithDestByteLimit(DestCharPointerType &dest, SrcCharPointerType src, size_t maxBytesToWrite) noexcept
static int indexOfCharIgnoreCase(Type text, juce_wchar charToFind) noexcept
static bool isDigit(char character) noexcept
static int compareIgnoreCaseUpTo(CharPointerType1 s1, CharPointerType2 s2, int maxChars) noexcept
static int indexOfChar(Type text, const juce_wchar charToFind) noexcept
static int compareIgnoreCase(juce_wchar char1, juce_wchar char2) noexcept
static bool isLowerCase(juce_wchar character) noexcept
static bool isLetter(char character) noexcept
static int indexOf(CharPointerType1 textToSearch, const CharPointerType2 substringToLookFor) noexcept
static size_t lengthUpTo(CharPointerType text, const size_t maxCharsToCount) noexcept
static Type findEndOfWhitespace(Type text) noexcept
static void copyWithCharLimit(DestCharPointerType &dest, SrcCharPointerType src, int maxChars) noexcept
static bool isWhitespace(char character) noexcept
static bool isLetterOrDigit(char character) noexcept
static juce_wchar toUpperCase(juce_wchar character) noexcept
static bool isUpperCase(juce_wchar character) noexcept
static double getDoubleValue(CharPointerType text) noexcept
static void copyAll(DestCharPointerType &dest, SrcCharPointerType src) noexcept
static int compareUpTo(CharPointerType1 s1, CharPointerType2 s2, int maxChars) noexcept