1/* 2 Unicode character type helpers. 3 4 Written by Marc-Andre Lemburg (mal@lemburg.com). 5 Modified for Python 2.0 by Fredrik Lundh (fredrik@pythonware.com) 6 7 Copyright (c) Corporation for National Research Initiatives. 8 9*/ 10 11#include "Python.h" 12#include "unicodeobject.h" 13 14#define ALPHA_MASK 0x01 15#define DECIMAL_MASK 0x02 16#define DIGIT_MASK 0x04 17#define LOWER_MASK 0x08 18#define LINEBREAK_MASK 0x10 19#define SPACE_MASK 0x20 20#define TITLE_MASK 0x40 21#define UPPER_MASK 0x80 22#define NODELTA_MASK 0x100 23#define NUMERIC_MASK 0x200 24 25typedef struct { 26 const Py_UNICODE upper; 27 const Py_UNICODE lower; 28 const Py_UNICODE title; 29 const unsigned char decimal; 30 const unsigned char digit; 31 const unsigned short flags; 32} _PyUnicode_TypeRecord; 33 34#include "unicodetype_db.h" 35 36static const _PyUnicode_TypeRecord * 37gettyperecord(Py_UNICODE code) 38{ 39 int index; 40 41#ifdef Py_UNICODE_WIDE 42 if (code >= 0x110000) 43 index = 0; 44 else 45#endif 46 { 47 index = index1[(code>>SHIFT)]; 48 index = index2[(index<<SHIFT)+(code&((1<<SHIFT)-1))]; 49 } 50 51 return &_PyUnicode_TypeRecords[index]; 52} 53 54/* Returns the titlecase Unicode characters corresponding to ch or just 55 ch if no titlecase mapping is known. */ 56 57Py_UNICODE _PyUnicode_ToTitlecase(register Py_UNICODE ch) 58{ 59 const _PyUnicode_TypeRecord *ctype = gettyperecord(ch); 60 int delta = ctype->title; 61 62 if (ctype->flags & NODELTA_MASK) 63 return delta; 64 65 if (delta >= 32768) 66 delta -= 65536; 67 68 return ch + delta; 69} 70 71/* Returns 1 for Unicode characters having the category 'Lt', 0 72 otherwise. */ 73 74int _PyUnicode_IsTitlecase(Py_UNICODE ch) 75{ 76 const _PyUnicode_TypeRecord *ctype = gettyperecord(ch); 77 78 return (ctype->flags & TITLE_MASK) != 0; 79} 80 81/* Returns the integer decimal (0-9) for Unicode characters having 82 this property, -1 otherwise. */ 83 84int _PyUnicode_ToDecimalDigit(Py_UNICODE ch) 85{ 86 const _PyUnicode_TypeRecord *ctype = gettyperecord(ch); 87 88 return (ctype->flags & DECIMAL_MASK) ? ctype->decimal : -1; 89} 90 91int _PyUnicode_IsDecimalDigit(Py_UNICODE ch) 92{ 93 if (_PyUnicode_ToDecimalDigit(ch) < 0) 94 return 0; 95 return 1; 96} 97 98/* Returns the integer digit (0-9) for Unicode characters having 99 this property, -1 otherwise. */ 100 101int _PyUnicode_ToDigit(Py_UNICODE ch) 102{ 103 const _PyUnicode_TypeRecord *ctype = gettyperecord(ch); 104 105 return (ctype->flags & DIGIT_MASK) ? ctype->digit : -1; 106} 107 108int _PyUnicode_IsDigit(Py_UNICODE ch) 109{ 110 if (_PyUnicode_ToDigit(ch) < 0) 111 return 0; 112 return 1; 113} 114 115/* Returns the numeric value as double for Unicode characters having 116 this property, -1.0 otherwise. */ 117 118int _PyUnicode_IsNumeric(Py_UNICODE ch) 119{ 120 const _PyUnicode_TypeRecord *ctype = gettyperecord(ch); 121 122 return (ctype->flags & NUMERIC_MASK) != 0; 123} 124 125#ifndef WANT_WCTYPE_FUNCTIONS 126 127/* Returns 1 for Unicode characters having the category 'Ll', 0 128 otherwise. */ 129 130int _PyUnicode_IsLowercase(Py_UNICODE ch) 131{ 132 const _PyUnicode_TypeRecord *ctype = gettyperecord(ch); 133 134 return (ctype->flags & LOWER_MASK) != 0; 135} 136 137/* Returns 1 for Unicode characters having the category 'Lu', 0 138 otherwise. */ 139 140int _PyUnicode_IsUppercase(Py_UNICODE ch) 141{ 142 const _PyUnicode_TypeRecord *ctype = gettyperecord(ch); 143 144 return (ctype->flags & UPPER_MASK) != 0; 145} 146 147/* Returns the uppercase Unicode characters corresponding to ch or just 148 ch if no uppercase mapping is known. */ 149 150Py_UNICODE _PyUnicode_ToUppercase(Py_UNICODE ch) 151{ 152 const _PyUnicode_TypeRecord *ctype = gettyperecord(ch); 153 int delta = ctype->upper; 154 if (ctype->flags & NODELTA_MASK) 155 return delta; 156 if (delta >= 32768) 157 delta -= 65536; 158 return ch + delta; 159} 160 161/* Returns the lowercase Unicode characters corresponding to ch or just 162 ch if no lowercase mapping is known. */ 163 164Py_UNICODE _PyUnicode_ToLowercase(Py_UNICODE ch) 165{ 166 const _PyUnicode_TypeRecord *ctype = gettyperecord(ch); 167 int delta = ctype->lower; 168 if (ctype->flags & NODELTA_MASK) 169 return delta; 170 if (delta >= 32768) 171 delta -= 65536; 172 return ch + delta; 173} 174 175/* Returns 1 for Unicode characters having the category 'Ll', 'Lu', 'Lt', 176 'Lo' or 'Lm', 0 otherwise. */ 177 178int _PyUnicode_IsAlpha(Py_UNICODE ch) 179{ 180 const _PyUnicode_TypeRecord *ctype = gettyperecord(ch); 181 182 return (ctype->flags & ALPHA_MASK) != 0; 183} 184 185#else 186 187/* Export the interfaces using the wchar_t type for portability 188 reasons: */ 189 190int _PyUnicode_IsLowercase(Py_UNICODE ch) 191{ 192 return iswlower(ch); 193} 194 195int _PyUnicode_IsUppercase(Py_UNICODE ch) 196{ 197 return iswupper(ch); 198} 199 200Py_UNICODE _PyUnicode_ToLowercase(Py_UNICODE ch) 201{ 202 return towlower(ch); 203} 204 205Py_UNICODE _PyUnicode_ToUppercase(Py_UNICODE ch) 206{ 207 return towupper(ch); 208} 209 210int _PyUnicode_IsAlpha(Py_UNICODE ch) 211{ 212 return iswalpha(ch); 213} 214 215#endif 216