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juce_CharacterFunctions.cpp
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
23 namespace juce
24{
25
26#if JUCE_MSVC
27 #pragma warning (push)
28 #pragma warning (disable: 4514 4996)
29#endif
30
31juce_wchar CharacterFunctions::toUpperCase (const juce_wchar character) noexcept
32{
33 return (juce_wchar) towupper ((wint_t) character);
34}
35
36juce_wchar CharacterFunctions::toLowerCase (const juce_wchar character) noexcept
37{
38 return (juce_wchar) towlower ((wint_t) character);
39}
40
41 bool CharacterFunctions::isUpperCase (const juce_wchar character) noexcept
42{
43 #if JUCE_WINDOWS
44 return iswupper ((wint_t) character) != 0;
45 #else
46 return toLowerCase (character) != character;
47 #endif
48}
49
50 bool CharacterFunctions::isLowerCase (const juce_wchar character) noexcept
51{
52 #if JUCE_WINDOWS
53 return iswlower ((wint_t) character) != 0;
54 #else
55 return toUpperCase (character) != character;
56 #endif
57}
58
59#if JUCE_MSVC
60 #pragma warning (pop)
61#endif
62
63//==============================================================================
64 bool CharacterFunctions::isWhitespace (const char character) noexcept
65{
66 return character == ' ' || (character <= 13 && character >= 9);
67}
68
69 bool CharacterFunctions::isWhitespace (const juce_wchar character) noexcept
70{
71 return iswspace ((wint_t) character) != 0;
72}
73
74 bool CharacterFunctions::isDigit (const char character) noexcept
75{
76 return (character >= '0' && character <= '9');
77}
78
79 bool CharacterFunctions::isDigit (const juce_wchar character) noexcept
80{
81 return iswdigit ((wint_t) character) != 0;
82}
83
84 bool CharacterFunctions::isLetter (const char character) noexcept
85{
86 return (character >= 'a' && character <= 'z')
87 || (character >= 'A' && character <= 'Z');
88}
89
90 bool CharacterFunctions::isLetter (const juce_wchar character) noexcept
91{
92 return iswalpha ((wint_t) character) != 0;
93}
94
95 bool CharacterFunctions::isLetterOrDigit (const char character) noexcept
96{
97 return (character >= 'a' && character <= 'z')
98 || (character >= 'A' && character <= 'Z')
99 || (character >= '0' && character <= '9');
100}
101
102 bool CharacterFunctions::isLetterOrDigit (const juce_wchar character) noexcept
103{
104 return iswalnum ((wint_t) character) != 0;
105}
106
107 bool CharacterFunctions::isPrintable (const char character) noexcept
108{
109 return (character >= ' ' && character <= '~');
110}
111
112 bool CharacterFunctions::isPrintable (const juce_wchar character) noexcept
113{
114 return iswprint ((wint_t) character) != 0;
115}
116
117 int CharacterFunctions::getHexDigitValue (const juce_wchar digit) noexcept
118{
119 auto d = (unsigned int) (digit - '0');
120
121 if (d < (unsigned int) 10)
122 return (int) d;
123
124 d += (unsigned int) ('0' - 'a');
125
126 if (d < (unsigned int) 6)
127 return (int) d + 10;
128
129 d += (unsigned int) ('a' - 'A');
130
131 if (d < (unsigned int) 6)
132 return (int) d + 10;
133
134 return -1;
135}
136
137 double CharacterFunctions::mulexp10 (const double value, int exponent) noexcept
138{
139 if (exponent == 0)
140 return value;
141
142 if (value == 0.0)
143 return 0;
144
145 const bool negative = (exponent < 0);
146
147 if (negative)
148 exponent = -exponent;
149
150 double result = 1.0, power = 10.0;
151
152 for (int bit = 1; exponent != 0; bit <<= 1)
153 {
154 if ((exponent & bit) != 0)
155 {
156 exponent ^= bit;
157 result *= power;
158
159 if (exponent == 0)
160 break;
161 }
162
163 power *= power;
164 }
165
166 return negative ? (value / result) : (value * result);
167}
168
169juce_wchar CharacterFunctions::getUnicodeCharFromWindows1252Codepage (const uint8 c) noexcept
170{
171 if (c < 0x80 || c >= 0xa0)
172 return (juce_wchar) c;
173
174 static const uint16 lookup[] = { 0x20AC, 0x0007, 0x201A, 0x0192, 0x201E, 0x2026, 0x2020, 0x2021,
175 0x02C6, 0x2030, 0x0160, 0x2039, 0x0152, 0x0007, 0x017D, 0x0007,
176 0x0007, 0x2018, 0x2019, 0x201C, 0x201D, 0x2022, 0x2013, 0x2014,
177 0x02DC, 0x2122, 0x0161, 0x203A, 0x0153, 0x0007, 0x017E, 0x0178 };
178
179 return (juce_wchar) lookup[c - 0x80];
180}
181
182
183//==============================================================================
184//==============================================================================
185#if JUCE_UNIT_TESTS
186
187#define QUOTE(x) #x
188#define STR(value) QUOTE(value)
189#define ASYM_STRING_DOUBLE_PAIR(str, value) std::pair<String, double> (STR(str), value)
190#define STRING_DOUBLE_PAIR(value) ASYM_STRING_DOUBLE_PAIR(value, value)
191#define STRING_DOUBLE_PAIR_COMBOS(value) \
192 STRING_DOUBLE_PAIR(value), \
193 STRING_DOUBLE_PAIR(-value), \
194 ASYM_STRING_DOUBLE_PAIR(+value, value), \
195 ASYM_STRING_DOUBLE_PAIR(000000 ## value, value), \
196 ASYM_STRING_DOUBLE_PAIR(+000 ## value, value), \
197 ASYM_STRING_DOUBLE_PAIR(-0 ## value, -value)
198
199 class CharacterFunctionsTests : public UnitTest
200{
201 public:
202 CharacterFunctionsTests()
203 : UnitTest ("CharacterFunctions", UnitTestCategories::text)
204 {}
205
206 void runTest() override
207 {
208 beginTest ("readDoubleValue");
209
210 static const std::pair<String, double> testValues[] =
211 {
212 // Integers
213 STRING_DOUBLE_PAIR_COMBOS (0),
214 STRING_DOUBLE_PAIR_COMBOS (3),
215 STRING_DOUBLE_PAIR_COMBOS (4931),
216 STRING_DOUBLE_PAIR_COMBOS (5000),
217 STRING_DOUBLE_PAIR_COMBOS (9862097),
218
219 // Floating point numbers
220 STRING_DOUBLE_PAIR_COMBOS (7.000),
221 STRING_DOUBLE_PAIR_COMBOS (0.2),
222 STRING_DOUBLE_PAIR_COMBOS (.298630),
223 STRING_DOUBLE_PAIR_COMBOS (1.118),
224 STRING_DOUBLE_PAIR_COMBOS (0.9000),
225 STRING_DOUBLE_PAIR_COMBOS (0.0000001),
226 STRING_DOUBLE_PAIR_COMBOS (500.0000001),
227 STRING_DOUBLE_PAIR_COMBOS (9862098.2398604),
228
229 // Exponents
230 STRING_DOUBLE_PAIR_COMBOS (0e0),
231 STRING_DOUBLE_PAIR_COMBOS (0.e0),
232 STRING_DOUBLE_PAIR_COMBOS (0.00000e0),
233 STRING_DOUBLE_PAIR_COMBOS (.0e7),
234 STRING_DOUBLE_PAIR_COMBOS (0e-5),
235 STRING_DOUBLE_PAIR_COMBOS (2E0),
236 STRING_DOUBLE_PAIR_COMBOS (4.E0),
237 STRING_DOUBLE_PAIR_COMBOS (1.2000000E0),
238 STRING_DOUBLE_PAIR_COMBOS (1.2000000E6),
239 STRING_DOUBLE_PAIR_COMBOS (.398e3),
240 STRING_DOUBLE_PAIR_COMBOS (10e10),
241 STRING_DOUBLE_PAIR_COMBOS (1.4962e+2),
242 STRING_DOUBLE_PAIR_COMBOS (3198693.0973e4),
243 STRING_DOUBLE_PAIR_COMBOS (10973097.2087E-4),
244 STRING_DOUBLE_PAIR_COMBOS (1.3986e00006),
245 STRING_DOUBLE_PAIR_COMBOS (2087.3087e+00006),
246 STRING_DOUBLE_PAIR_COMBOS (6.0872e-00006),
247
248 // Too many sig figs. The parsing routine on MinGW gets the last
249 // significant figure wrong.
250 STRING_DOUBLE_PAIR_COMBOS (17654321098765432.9),
251 STRING_DOUBLE_PAIR_COMBOS (183456789012345678.9),
252 STRING_DOUBLE_PAIR_COMBOS (1934567890123456789.9),
253 STRING_DOUBLE_PAIR_COMBOS (20345678901234567891.9),
254 STRING_DOUBLE_PAIR_COMBOS (10000000000000000303786028427003666890752.000000),
255 STRING_DOUBLE_PAIR_COMBOS (10000000000000000303786028427003666890752e3),
256 STRING_DOUBLE_PAIR_COMBOS (10000000000000000303786028427003666890752e100),
257 STRING_DOUBLE_PAIR_COMBOS (10000000000000000303786028427003666890752.000000e-5),
258 STRING_DOUBLE_PAIR_COMBOS (10000000000000000303786028427003666890752.000000e-40),
259
260 STRING_DOUBLE_PAIR_COMBOS (1.23456789012345678901234567890),
261 STRING_DOUBLE_PAIR_COMBOS (1.23456789012345678901234567890e-111)
262
263 // Limits. DBL_MAX may not exist on Linux.
264 #if ! JUCE_LINUX
265 , STRING_DOUBLE_PAIR (DBL_MAX),
266 STRING_DOUBLE_PAIR (-DBL_MAX),
267 STRING_DOUBLE_PAIR (DBL_MIN)
268 #endif
269 };
270
271 for (auto trial : testValues)
272 {
273 auto charPtr = trial.first.getCharPointer();
274 expectEquals (CharacterFunctions::readDoubleValue (charPtr), trial.second);
275 }
276
277 {
278 String nans[] = { "NaN", "-nan", "+NAN", "1.0E1024", "-1.0E-999", "1.23456789012345678901234567890e123456789"};
279
280 for (auto nan : nans)
281 {
282 auto charPtr = nan.getCharPointer();
283 expect (std::isnan (CharacterFunctions::readDoubleValue (charPtr)));
284 }
285 }
286
287 {
288 String infs[] = { "Inf", "-inf", "INF"};
289
290 for (auto inf : infs)
291 {
292 auto charPtr = inf.getCharPointer();
293 expect (std::isinf (CharacterFunctions::readDoubleValue (charPtr)));
294 }
295 }
296 }
297};
298
299 static CharacterFunctionsTests characterFunctionsTests;
300
301#endif
302
303} // namespace juce
juce::CharacterFunctions::toLowerCase
static juce_wchar toLowerCase(juce_wchar character) noexcept
Definition: juce_CharacterFunctions.cpp:36
juce::CharacterFunctions::isDigit
static bool isDigit(char character) noexcept
Definition: juce_CharacterFunctions.cpp:74
juce::CharacterFunctions::isLowerCase
static bool isLowerCase(juce_wchar character) noexcept
Definition: juce_CharacterFunctions.cpp:50
juce::CharacterFunctions::isLetter
static bool isLetter(char character) noexcept
Definition: juce_CharacterFunctions.cpp:84
juce::CharacterFunctions::getHexDigitValue
static int getHexDigitValue(juce_wchar digit) noexcept
Definition: juce_CharacterFunctions.cpp:117
juce::CharacterFunctions::isWhitespace
static bool isWhitespace(char character) noexcept
Definition: juce_CharacterFunctions.cpp:64
juce::CharacterFunctions::isLetterOrDigit
static bool isLetterOrDigit(char character) noexcept
Definition: juce_CharacterFunctions.cpp:95
juce::CharacterFunctions::toUpperCase
static juce_wchar toUpperCase(juce_wchar character) noexcept
Definition: juce_CharacterFunctions.cpp:31
juce::CharacterFunctions::isUpperCase
static bool isUpperCase(juce_wchar character) noexcept
Definition: juce_CharacterFunctions.cpp:41
juce::CharacterFunctions::isPrintable
static bool isPrintable(char character) noexcept
Definition: juce_CharacterFunctions.cpp:107
juce::CharacterFunctions::getUnicodeCharFromWindows1252Codepage
static juce_wchar getUnicodeCharFromWindows1252Codepage(uint8 windows1252Char) noexcept
Definition: juce_CharacterFunctions.cpp:169
juce::UnitTest
Definition: juce_UnitTest.h:70