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juce_CharacterFunctions.cpp
1/*
2 ==============================================================================
3
4 This file is part of the JUCE library.
5 Copyright (c) 2022 - Raw Material Software Limited
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
23 namespace juce
24{
25
26JUCE_BEGIN_IGNORE_WARNINGS_MSVC (4514 4996)
27
28juce_wchar CharacterFunctions::toUpperCase (const juce_wchar character) noexcept
29{
30 return (juce_wchar) towupper ((wint_t) character);
31}
32
33juce_wchar CharacterFunctions::toLowerCase (const juce_wchar character) noexcept
34{
35 return (juce_wchar) towlower ((wint_t) character);
36}
37
38 bool CharacterFunctions::isUpperCase (const juce_wchar character) noexcept
39{
40 #if JUCE_WINDOWS
41 return iswupper ((wint_t) character) != 0;
42 #else
43 return toLowerCase (character) != character;
44 #endif
45}
46
47 bool CharacterFunctions::isLowerCase (const juce_wchar character) noexcept
48{
49 #if JUCE_WINDOWS
50 return iswlower ((wint_t) character) != 0;
51 #else
52 return toUpperCase (character) != character;
53 #endif
54}
55
56JUCE_END_IGNORE_WARNINGS_MSVC
57
58//==============================================================================
59 bool CharacterFunctions::isWhitespace (const char character) noexcept
60{
61 return character == ' ' || (character <= 13 && character >= 9);
62}
63
64 bool CharacterFunctions::isWhitespace (const juce_wchar character) noexcept
65{
66 return iswspace ((wint_t) character) != 0;
67}
68
69 bool CharacterFunctions::isDigit (const char character) noexcept
70{
71 return (character >= '0' && character <= '9');
72}
73
74 bool CharacterFunctions::isDigit (const juce_wchar character) noexcept
75{
76 return iswdigit ((wint_t) character) != 0;
77}
78
79 bool CharacterFunctions::isLetter (const char character) noexcept
80{
81 return (character >= 'a' && character <= 'z')
82 || (character >= 'A' && character <= 'Z');
83}
84
85 bool CharacterFunctions::isLetter (const juce_wchar character) noexcept
86{
87 return iswalpha ((wint_t) character) != 0;
88}
89
90 bool CharacterFunctions::isLetterOrDigit (const char character) noexcept
91{
92 return (character >= 'a' && character <= 'z')
93 || (character >= 'A' && character <= 'Z')
94 || (character >= '0' && character <= '9');
95}
96
97 bool CharacterFunctions::isLetterOrDigit (const juce_wchar character) noexcept
98{
99 return iswalnum ((wint_t) character) != 0;
100}
101
102 bool CharacterFunctions::isPrintable (const char character) noexcept
103{
104 return (character >= ' ' && character <= '~');
105}
106
107 bool CharacterFunctions::isPrintable (const juce_wchar character) noexcept
108{
109 return iswprint ((wint_t) character) != 0;
110}
111
112 int CharacterFunctions::getHexDigitValue (const juce_wchar digit) noexcept
113{
114 auto d = (unsigned int) (digit - '0');
115
116 if (d < (unsigned int) 10)
117 return (int) d;
118
119 d += (unsigned int) ('0' - 'a');
120
121 if (d < (unsigned int) 6)
122 return (int) d + 10;
123
124 d += (unsigned int) ('a' - 'A');
125
126 if (d < (unsigned int) 6)
127 return (int) d + 10;
128
129 return -1;
130}
131
132 double CharacterFunctions::mulexp10 (const double value, int exponent) noexcept
133{
134 if (exponent == 0)
135 return value;
136
137 if (exactlyEqual (value, 0.0))
138 return 0;
139
140 const bool negative = (exponent < 0);
141
142 if (negative)
143 exponent = -exponent;
144
145 double result = 1.0, power = 10.0;
146
147 for (int bit = 1; exponent != 0; bit <<= 1)
148 {
149 if ((exponent & bit) != 0)
150 {
151 exponent ^= bit;
152 result *= power;
153
154 if (exponent == 0)
155 break;
156 }
157
158 power *= power;
159 }
160
161 return negative ? (value / result) : (value * result);
162}
163
164juce_wchar CharacterFunctions::getUnicodeCharFromWindows1252Codepage (const uint8 c) noexcept
165{
166 if (c < 0x80 || c >= 0xa0)
167 return (juce_wchar) c;
168
169 static const uint16 lookup[] = { 0x20AC, 0x0007, 0x201A, 0x0192, 0x201E, 0x2026, 0x2020, 0x2021,
170 0x02C6, 0x2030, 0x0160, 0x2039, 0x0152, 0x0007, 0x017D, 0x0007,
171 0x0007, 0x2018, 0x2019, 0x201C, 0x201D, 0x2022, 0x2013, 0x2014,
172 0x02DC, 0x2122, 0x0161, 0x203A, 0x0153, 0x0007, 0x017E, 0x0178 };
173
174 return (juce_wchar) lookup[c - 0x80];
175}
176
177
178//==============================================================================
179//==============================================================================
180#if JUCE_UNIT_TESTS
181
182#define QUOTE(x) #x
183#define STR(value) QUOTE(value)
184#define ASYM_CHARPTR_DOUBLE_PAIR(str, value) std::pair<const char*, double> (STR(str), value)
185#define CHARPTR_DOUBLE_PAIR(value) ASYM_CHARPTR_DOUBLE_PAIR(value, value)
186#define CHARPTR_DOUBLE_PAIR_COMBOS(value) \
187 CHARPTR_DOUBLE_PAIR(value), \
188 CHARPTR_DOUBLE_PAIR(-value), \
189 ASYM_CHARPTR_DOUBLE_PAIR(+value, value), \
190 ASYM_CHARPTR_DOUBLE_PAIR(000000 ## value, value), \
191 ASYM_CHARPTR_DOUBLE_PAIR(+000 ## value, value), \
192 ASYM_CHARPTR_DOUBLE_PAIR(-0 ## value, -value)
193
194 namespace characterFunctionsTests
195{
196
197 template <typename CharPointerType>
198 MemoryBlock memoryBlockFromCharPtr (const typename CharPointerType::CharType* charPtr)
199{
200 using CharType = typename CharPointerType::CharType;
201
202 MemoryBlock result;
203 CharPointerType source (charPtr);
204
205 result.setSize (CharPointerType::getBytesRequiredFor (source) + sizeof (CharType));
206 CharPointerType dest { (CharType*) result.getData() };
207 dest.writeAll (source);
208 return result;
209}
210
211 template <typename FromCharPointerType, typename ToCharPointerType>
212MemoryBlock convert (const MemoryBlock& source, bool removeNullTerminator = false)
213{
214 using ToCharType = typename ToCharPointerType ::CharType;
215 using FromCharType = typename FromCharPointerType::CharType;
216
217 FromCharPointerType sourcePtr { (FromCharType*) source.getData() };
218
219 std::vector<juce_wchar> sourceChars;
220 size_t requiredSize = 0;
221 juce_wchar c;
222
223 while ((c = sourcePtr.getAndAdvance()) != '\0')
224 {
225 requiredSize += ToCharPointerType::getBytesRequiredFor (c);
226 sourceChars.push_back (c);
227 }
228
229 if (! removeNullTerminator)
230 requiredSize += sizeof (ToCharType);
231
232 MemoryBlock result;
233 result.setSize (requiredSize);
234
235 ToCharPointerType dest { (ToCharType*) result.getData() };
236
237 for (auto wc : sourceChars)
238 dest.write (wc);
239
240 if (! removeNullTerminator)
241 dest.writeNull();
242
243 return result;
244}
245
246 struct SeparatorStrings
247{
248 std::vector<MemoryBlock> terminals, nulls;
249};
250
251 template <typename CharPointerType>
252SeparatorStrings getSeparators()
253{
254 jassertfalse;
255 return {};
256}
257
258 template <>
259SeparatorStrings getSeparators<CharPointer_ASCII>()
260{
261 SeparatorStrings result;
262
263 const CharPointer_ASCII::CharType* terminalCharPtrs[] = {
264 "", "-", "+", "e", "e+", "E-", "f", " ", ",", ";", "<", "'", "\"", "_", "k",
265 " +", " -", " -e", "-In ", " +n", "n", " r"
266 };
267
268 for (auto ptr : terminalCharPtrs)
269 result.terminals.push_back (memoryBlockFromCharPtr<CharPointer_ASCII> (ptr));
270
271 const CharPointer_ASCII::CharType* nullCharPtrs[] = { "." };
272
273 result.nulls = result.terminals;
274
275 for (auto ptr : nullCharPtrs)
276 result.nulls.push_back (memoryBlockFromCharPtr<CharPointer_ASCII> (ptr));
277
278 return result;
279}
280
281 template <>
282SeparatorStrings getSeparators<CharPointer_UTF8>()
283{
284 auto result = getSeparators<CharPointer_ASCII>();
285
286 const CharPointer_UTF8::CharType* terminalCharPtrs[] = {
287 "\xe2\x82\xac", // €
288 "\xf0\x90\x90\xB7", // 𐐷
289 "\xf0\x9f\x98\x83", // 😃
290 "\xf0\x9f\x8f\x81\xF0\x9F\x9A\x97" // 🏁🚗
291 };
292
293 for (auto ptr : terminalCharPtrs)
294 {
295 auto block = memoryBlockFromCharPtr<CharPointer_UTF8> (ptr);
296
297 for (auto vec : { &result.terminals, &result.nulls })
298 vec->push_back (block);
299 }
300
301 return result;
302}
303
304 template <typename CharPointerType, typename StorageType>
305SeparatorStrings prefixWithAsciiSeparators (const std::vector<std::vector<StorageType>>& terminalCharPtrs)
306{
307 auto asciiSeparators = getSeparators<CharPointer_ASCII>();
308
309 SeparatorStrings result;
310
311 for (const auto& block : asciiSeparators.terminals)
312 result.terminals.push_back (convert<CharPointer_ASCII, CharPointerType> (block));
313
314 for (const auto& block : asciiSeparators.nulls)
315 result.nulls.push_back (convert<CharPointer_ASCII, CharPointerType> (block));
316
317 for (auto& t : terminalCharPtrs)
318 {
319 const auto block = memoryBlockFromCharPtr<CharPointerType> ((typename CharPointerType::CharType*) t.data());
320
321 for (auto vec : { &result.terminals, &result.nulls })
322 vec->push_back (block);
323 }
324
325 return result;
326}
327
328 template <>
329SeparatorStrings getSeparators<CharPointer_UTF16>()
330{
331 const std::vector<std::vector<char16_t>> terminalCharPtrs {
332 { 0x0 },
333 { 0x0076, 0x0 }, // v
334 { 0x20ac, 0x0 }, // €
335 { 0xd801, 0xdc37, 0x0 }, // 𐐷
336 { 0x0065, 0xd83d, 0xde03, 0x0 }, // e😃
337 { 0xd83c, 0xdfc1, 0xd83d, 0xde97, 0x0 } // 🏁🚗
338 };
339
340 return prefixWithAsciiSeparators<CharPointer_UTF16> (terminalCharPtrs);
341}
342
343 template <>
344SeparatorStrings getSeparators<CharPointer_UTF32>()
345{
346 const std::vector<std::vector<char32_t>> terminalCharPtrs = {
347 { 0x00000076, 0x0 }, // v
348 { 0x000020aC, 0x0 }, // €
349 { 0x00010437, 0x0 }, // 𐐷
350 { 0x00000065, 0x0001f603, 0x0 }, // e😃
351 { 0x0001f3c1, 0x0001f697, 0x0 } // 🏁🚗
352 };
353
354 return prefixWithAsciiSeparators<CharPointer_UTF32> (terminalCharPtrs);
355}
356
357 template <typename TestFunction>
358 void withAllPrefixesAndSuffixes (const std::vector<MemoryBlock>& prefixes,
359 const std::vector<MemoryBlock>& suffixes,
360 const std::vector<MemoryBlock>& testValues,
361 TestFunction&& test)
362{
363 for (const auto& prefix : prefixes)
364 {
365 for (const auto& testValue : testValues)
366 {
367 MemoryBlock testBlock = prefix;
368 testBlock.append (testValue.getData(), testValue.getSize());
369
370 for (const auto& suffix : suffixes)
371 {
372 MemoryBlock data = testBlock;
373 data.append (suffix.getData(), suffix.getSize());
374
375 test (data, suffix);
376 }
377 }
378 }
379}
380
381 template <typename CharPointerType>
382 class CharacterFunctionsTests final : public UnitTest
383{
384 public:
385 using CharType = typename CharPointerType::CharType;
386
387 CharacterFunctionsTests()
388 : UnitTest ("CharacterFunctions", UnitTestCategories::text)
389 {}
390
391 void runTest() override
392 {
393 beginTest ("readDoubleValue");
394
395 const std::pair<const char*, double> trials[] =
396 {
397 // Integers
398 CHARPTR_DOUBLE_PAIR_COMBOS (0),
399 CHARPTR_DOUBLE_PAIR_COMBOS (3),
400 CHARPTR_DOUBLE_PAIR_COMBOS (4931),
401 CHARPTR_DOUBLE_PAIR_COMBOS (5000),
402 CHARPTR_DOUBLE_PAIR_COMBOS (9862097),
403
404 // Floating point numbers
405 CHARPTR_DOUBLE_PAIR_COMBOS (0.),
406 CHARPTR_DOUBLE_PAIR_COMBOS (9.),
407 CHARPTR_DOUBLE_PAIR_COMBOS (7.000),
408 CHARPTR_DOUBLE_PAIR_COMBOS (0.2),
409 CHARPTR_DOUBLE_PAIR_COMBOS (.298630),
410 CHARPTR_DOUBLE_PAIR_COMBOS (1.118),
411 CHARPTR_DOUBLE_PAIR_COMBOS (0.9000),
412 CHARPTR_DOUBLE_PAIR_COMBOS (0.0000001),
413 CHARPTR_DOUBLE_PAIR_COMBOS (500.0000001),
414 CHARPTR_DOUBLE_PAIR_COMBOS (9862098.2398604),
415
416 // Exponents
417 CHARPTR_DOUBLE_PAIR_COMBOS (0e0),
418 CHARPTR_DOUBLE_PAIR_COMBOS (0.e0),
419 CHARPTR_DOUBLE_PAIR_COMBOS (0.00000e0),
420 CHARPTR_DOUBLE_PAIR_COMBOS (.0e7),
421 CHARPTR_DOUBLE_PAIR_COMBOS (0e-5),
422 CHARPTR_DOUBLE_PAIR_COMBOS (2E0),
423 CHARPTR_DOUBLE_PAIR_COMBOS (4.E0),
424 CHARPTR_DOUBLE_PAIR_COMBOS (1.2000000E0),
425 CHARPTR_DOUBLE_PAIR_COMBOS (1.2000000E6),
426 CHARPTR_DOUBLE_PAIR_COMBOS (.398e3),
427 CHARPTR_DOUBLE_PAIR_COMBOS (10e10),
428 CHARPTR_DOUBLE_PAIR_COMBOS (1.4962e+2),
429 CHARPTR_DOUBLE_PAIR_COMBOS (3198693.0973e4),
430 CHARPTR_DOUBLE_PAIR_COMBOS (10973097.2087E-4),
431 CHARPTR_DOUBLE_PAIR_COMBOS (1.3986e00006),
432 CHARPTR_DOUBLE_PAIR_COMBOS (2087.3087e+00006),
433 CHARPTR_DOUBLE_PAIR_COMBOS (6.0872e-00006),
434
435 CHARPTR_DOUBLE_PAIR_COMBOS (1.7976931348623157e+308),
436 CHARPTR_DOUBLE_PAIR_COMBOS (2.2250738585072014e-308),
437
438 // Too many sig figs. The parsing routine on MinGW gets the last
439 // significant figure wrong.
440 CHARPTR_DOUBLE_PAIR_COMBOS (17654321098765432.9),
441 CHARPTR_DOUBLE_PAIR_COMBOS (183456789012345678.9),
442 CHARPTR_DOUBLE_PAIR_COMBOS (1934567890123456789.9),
443 CHARPTR_DOUBLE_PAIR_COMBOS (20345678901234567891.9),
444 CHARPTR_DOUBLE_PAIR_COMBOS (10000000000000000303786028427003666890752.000000),
445 CHARPTR_DOUBLE_PAIR_COMBOS (10000000000000000303786028427003666890752e3),
446 CHARPTR_DOUBLE_PAIR_COMBOS (10000000000000000303786028427003666890752e100),
447 CHARPTR_DOUBLE_PAIR_COMBOS (10000000000000000303786028427003666890752.000000e-5),
448 CHARPTR_DOUBLE_PAIR_COMBOS (10000000000000000303786028427003666890752.000005e-40),
449
450 CHARPTR_DOUBLE_PAIR_COMBOS (1.23456789012345678901234567890),
451 CHARPTR_DOUBLE_PAIR_COMBOS (1.23456789012345678901234567890e-111),
452 };
453
454 auto asciiToMemoryBlock = [] (const char* asciiPtr, bool removeNullTerminator)
455 {
456 auto block = memoryBlockFromCharPtr<CharPointer_ASCII> (asciiPtr);
457 return convert<CharPointer_ASCII, CharPointerType> (block, removeNullTerminator);
458 };
459
460 const auto separators = getSeparators<CharPointerType>();
461
462 for (const auto& trial : trials)
463 {
464 for (const auto& terminal : separators.terminals)
465 {
466 MemoryBlock data { asciiToMemoryBlock (trial.first, true) };
467 data.append (terminal.getData(), terminal.getSize());
468
469 CharPointerType charPtr { (CharType*) data.getData() };
470 expectEquals (CharacterFunctions::readDoubleValue (charPtr), trial.second);
471 expect (*charPtr == *(CharPointerType ((CharType*) terminal.getData())));
472 }
473 }
474
475 auto asciiToMemoryBlocks = [&] (const std::vector<const char*>& asciiPtrs, bool removeNullTerminator)
476 {
477 std::vector<MemoryBlock> result;
478
479 for (auto* ptr : asciiPtrs)
480 result.push_back (asciiToMemoryBlock (ptr, removeNullTerminator));
481
482 return result;
483 };
484
485 std::vector<const char*> prefixCharPtrs = { "" , "+", "-" };
486 const auto prefixes = asciiToMemoryBlocks (prefixCharPtrs, true);
487
488 {
489 std::vector<const char*> nanCharPtrs = { "NaN", "nan", "NAN", "naN" };
490 auto nans = asciiToMemoryBlocks (nanCharPtrs, true);
491
492 withAllPrefixesAndSuffixes (prefixes, separators.terminals, nans, [this] (const MemoryBlock& data,
493 const MemoryBlock& suffix)
494 {
495 CharPointerType charPtr { (CharType*) data.getData() };
496 expect (std::isnan (CharacterFunctions::readDoubleValue (charPtr)));
497 expect (*charPtr == *(CharPointerType ((CharType*) suffix.getData())));
498 });
499 }
500
501 {
502 std::vector<const char*> infCharPtrs = { "Inf", "inf", "INF", "InF", "1.0E1024", "1.23456789012345678901234567890e123456789" };
503 auto infs = asciiToMemoryBlocks (infCharPtrs, true);
504
505 withAllPrefixesAndSuffixes (prefixes, separators.terminals, infs, [this] (const MemoryBlock& data,
506 const MemoryBlock& suffix)
507 {
508 CharPointerType charPtr { (CharType*) data.getData() };
509 auto expected = charPtr[0] == '-' ? -std::numeric_limits<double>::infinity()
510 : std::numeric_limits<double>::infinity();
511 expectEquals (CharacterFunctions::readDoubleValue (charPtr), expected);
512 expect (*charPtr == *(CharPointerType ((CharType*) suffix.getData())));
513 });
514 }
515
516 {
517 std::vector<const char*> zeroCharPtrs = { "1.0E-400", "1.23456789012345678901234567890e-123456789" };
518 auto zeros = asciiToMemoryBlocks (zeroCharPtrs, true);
519
520 withAllPrefixesAndSuffixes (prefixes, separators.terminals, zeros, [this] (const MemoryBlock& data,
521 const MemoryBlock& suffix)
522 {
523 CharPointerType charPtr { (CharType*) data.getData() };
524 auto expected = charPtr[0] == '-' ? -0.0 : 0.0;
525 expectEquals (CharacterFunctions::readDoubleValue (charPtr), expected);
526 expect (*charPtr == *(CharPointerType ((CharType*) suffix.getData())));
527 });
528 }
529
530 {
531 for (const auto& n : separators.nulls)
532 {
533 MemoryBlock data { n.getData(), n.getSize() };
534 CharPointerType charPtr { (CharType*) data.getData() };
535 expectEquals (CharacterFunctions::readDoubleValue (charPtr), 0.0);
536 expect (charPtr == CharPointerType { (CharType*) data.getData() }.findEndOfWhitespace());
537 }
538 }
539 }
540};
541
542 static CharacterFunctionsTests<CharPointer_ASCII> characterFunctionsTestsAscii;
543 static CharacterFunctionsTests<CharPointer_UTF8> characterFunctionsTestsUtf8;
544 static CharacterFunctionsTests<CharPointer_UTF16> characterFunctionsTestsUtf16;
545 static CharacterFunctionsTests<CharPointer_UTF32> characterFunctionsTestsUtf32;
546
547}
548
549#endif
550
551} // namespace juce
juce::CharacterFunctions
Definition juce_CharacterFunctions.h:92
juce::CharacterFunctions::toLowerCase
static juce_wchar toLowerCase(juce_wchar character) noexcept
Definition juce_CharacterFunctions.cpp:33
juce::CharacterFunctions::isDigit
static bool isDigit(char character) noexcept
Definition juce_CharacterFunctions.cpp:69
juce::CharacterFunctions::isLowerCase
static bool isLowerCase(juce_wchar character) noexcept
Definition juce_CharacterFunctions.cpp:47
juce::CharacterFunctions::isLetter
static bool isLetter(char character) noexcept
Definition juce_CharacterFunctions.cpp:79
juce::CharacterFunctions::isWhitespace
static bool isWhitespace(char character) noexcept
Definition juce_CharacterFunctions.cpp:59
juce::CharacterFunctions::readDoubleValue
static double readDoubleValue(CharPointerType &text) noexcept
Definition juce_CharacterFunctions.h:147
juce::CharacterFunctions::getHexDigitValue
static int getHexDigitValue(juce_wchar digit) noexcept
Definition juce_CharacterFunctions.cpp:112
juce::CharacterFunctions::isLetterOrDigit
static bool isLetterOrDigit(char character) noexcept
Definition juce_CharacterFunctions.cpp:90
juce::CharacterFunctions::isUpperCase
static bool isUpperCase(juce_wchar character) noexcept
Definition juce_CharacterFunctions.cpp:38
juce::CharacterFunctions::isPrintable
static bool isPrintable(char character) noexcept
Definition juce_CharacterFunctions.cpp:102
juce::CharacterFunctions::getUnicodeCharFromWindows1252Codepage
static juce_wchar getUnicodeCharFromWindows1252Codepage(uint8 windows1252Char) noexcept
Definition juce_CharacterFunctions.cpp:164
juce::MemoryBlock
Definition juce_MemoryBlock.h:33
juce::MemoryBlock::getData
void * getData() noexcept
Definition juce_MemoryBlock.h:91
juce::MemoryBlock::setSize
void setSize(size_t newSize, bool initialiseNewSpaceToZero=false)
Definition juce_MemoryBlock.cpp:115