mirror of https://github.com/python/cpython.git
433 lines
8.9 KiB
C
433 lines
8.9 KiB
C
/*
|
|
Unicode character type helpers.
|
|
|
|
Written by Marc-Andre Lemburg (mal@lemburg.com).
|
|
Modified for Python 2.0 by Fredrik Lundh (fredrik@pythonware.com)
|
|
|
|
Copyright (c) Corporation for National Research Initiatives.
|
|
|
|
*/
|
|
|
|
#include "Python.h"
|
|
#include "unicodeobject.h"
|
|
|
|
#define ALPHA_MASK 0x01
|
|
#define DECIMAL_MASK 0x02
|
|
#define DIGIT_MASK 0x04
|
|
#define LOWER_MASK 0x08
|
|
#define LINEBREAK_MASK 0x10
|
|
#define SPACE_MASK 0x20
|
|
#define TITLE_MASK 0x40
|
|
#define UPPER_MASK 0x80
|
|
|
|
typedef struct {
|
|
const unsigned short flags;
|
|
const Py_UNICODE upper;
|
|
const Py_UNICODE lower;
|
|
const Py_UNICODE title;
|
|
const unsigned char decimal;
|
|
const unsigned char digit;
|
|
} _PyUnicode_TypeRecord;
|
|
|
|
#include "unicodetype_db.h"
|
|
|
|
static const _PyUnicode_TypeRecord *
|
|
gettyperecord(Py_UNICODE code)
|
|
{
|
|
int index;
|
|
|
|
if (code >= 65536)
|
|
index = 0;
|
|
else {
|
|
index = index1[(code>>SHIFT)];
|
|
index = index2[(index<<SHIFT)+(code&((1<<SHIFT)-1))];
|
|
}
|
|
|
|
return &_PyUnicode_TypeRecords[index];
|
|
}
|
|
|
|
/* Returns 1 for Unicode characters having the category 'Zl' or type
|
|
'B', 0 otherwise. */
|
|
|
|
int _PyUnicode_IsLinebreak(register const Py_UNICODE ch)
|
|
{
|
|
const _PyUnicode_TypeRecord *ctype = gettyperecord(ch);
|
|
|
|
return (ctype->flags & LINEBREAK_MASK) != 0;
|
|
}
|
|
|
|
/* Returns the titlecase Unicode characters corresponding to ch or just
|
|
ch if no titlecase mapping is known. */
|
|
|
|
Py_UNICODE _PyUnicode_ToTitlecase(register Py_UNICODE ch)
|
|
{
|
|
const _PyUnicode_TypeRecord *ctype = gettyperecord(ch);
|
|
|
|
if (ctype->title)
|
|
ch += ctype->title;
|
|
else
|
|
ch += ctype->upper;
|
|
|
|
#ifdef Py_UNICODE_WIDE
|
|
/* The database assumes that the values wrap around at 0x10000. */
|
|
if (ch > 0x10000)
|
|
ch -= 0x10000;
|
|
#endif
|
|
return ch;
|
|
}
|
|
|
|
/* Returns 1 for Unicode characters having the category 'Lt', 0
|
|
otherwise. */
|
|
|
|
int _PyUnicode_IsTitlecase(register const Py_UNICODE ch)
|
|
{
|
|
const _PyUnicode_TypeRecord *ctype = gettyperecord(ch);
|
|
|
|
return (ctype->flags & TITLE_MASK) != 0;
|
|
}
|
|
|
|
/* Returns the integer decimal (0-9) for Unicode characters having
|
|
this property, -1 otherwise. */
|
|
|
|
int _PyUnicode_ToDecimalDigit(register const Py_UNICODE ch)
|
|
{
|
|
const _PyUnicode_TypeRecord *ctype = gettyperecord(ch);
|
|
|
|
return (ctype->flags & DECIMAL_MASK) ? ctype->decimal : -1;
|
|
}
|
|
|
|
int _PyUnicode_IsDecimalDigit(register const Py_UNICODE ch)
|
|
{
|
|
if (_PyUnicode_ToDecimalDigit(ch) < 0)
|
|
return 0;
|
|
return 1;
|
|
}
|
|
|
|
/* Returns the integer digit (0-9) for Unicode characters having
|
|
this property, -1 otherwise. */
|
|
|
|
int _PyUnicode_ToDigit(register const Py_UNICODE ch)
|
|
{
|
|
const _PyUnicode_TypeRecord *ctype = gettyperecord(ch);
|
|
|
|
return (ctype->flags & DIGIT_MASK) ? ctype->digit : -1;
|
|
}
|
|
|
|
int _PyUnicode_IsDigit(register const Py_UNICODE ch)
|
|
{
|
|
if (_PyUnicode_ToDigit(ch) < 0)
|
|
return 0;
|
|
return 1;
|
|
}
|
|
|
|
/* Returns the numeric value as double for Unicode characters having
|
|
this property, -1.0 otherwise. */
|
|
|
|
/* TODO: replace with unicodetype_db.h table */
|
|
|
|
double _PyUnicode_ToNumeric(register const Py_UNICODE ch)
|
|
{
|
|
switch (ch) {
|
|
case 0x3007:
|
|
return (double) 0;
|
|
case 0x09F4:
|
|
case 0x215F:
|
|
case 0x2160:
|
|
case 0x2170:
|
|
case 0x3021:
|
|
case 0x3280:
|
|
return (double) 1;
|
|
case 0x00BD:
|
|
return (double) 1 / 2;
|
|
case 0x2153:
|
|
return (double) 1 / 3;
|
|
case 0x00BC:
|
|
return (double) 1 / 4;
|
|
case 0x2155:
|
|
return (double) 1 / 5;
|
|
case 0x2159:
|
|
return (double) 1 / 6;
|
|
case 0x215B:
|
|
return (double) 1 / 8;
|
|
case 0x0BF0:
|
|
case 0x1372:
|
|
case 0x2169:
|
|
case 0x2179:
|
|
case 0x2469:
|
|
case 0x247D:
|
|
case 0x2491:
|
|
case 0x277F:
|
|
case 0x2789:
|
|
case 0x2793:
|
|
case 0x3038:
|
|
case 0x3289:
|
|
return (double) 10;
|
|
case 0x0BF1:
|
|
case 0x137B:
|
|
case 0x216D:
|
|
case 0x217D:
|
|
return (double) 100;
|
|
case 0x0BF2:
|
|
case 0x216F:
|
|
case 0x217F:
|
|
case 0x2180:
|
|
return (double) 1000;
|
|
case 0x137C:
|
|
case 0x2182:
|
|
return (double) 10000;
|
|
case 0x216A:
|
|
case 0x217A:
|
|
case 0x246A:
|
|
case 0x247E:
|
|
case 0x2492:
|
|
return (double) 11;
|
|
case 0x216B:
|
|
case 0x217B:
|
|
case 0x246B:
|
|
case 0x247F:
|
|
case 0x2493:
|
|
return (double) 12;
|
|
case 0x246C:
|
|
case 0x2480:
|
|
case 0x2494:
|
|
return (double) 13;
|
|
case 0x246D:
|
|
case 0x2481:
|
|
case 0x2495:
|
|
return (double) 14;
|
|
case 0x246E:
|
|
case 0x2482:
|
|
case 0x2496:
|
|
return (double) 15;
|
|
case 0x09F9:
|
|
case 0x246F:
|
|
case 0x2483:
|
|
case 0x2497:
|
|
return (double) 16;
|
|
case 0x16EE:
|
|
case 0x2470:
|
|
case 0x2484:
|
|
case 0x2498:
|
|
return (double) 17;
|
|
case 0x16EF:
|
|
case 0x2471:
|
|
case 0x2485:
|
|
case 0x2499:
|
|
return (double) 18;
|
|
case 0x16F0:
|
|
case 0x2472:
|
|
case 0x2486:
|
|
case 0x249A:
|
|
return (double) 19;
|
|
case 0x09F5:
|
|
case 0x2161:
|
|
case 0x2171:
|
|
case 0x3022:
|
|
case 0x3281:
|
|
return (double) 2;
|
|
case 0x2154:
|
|
return (double) 2 / 3;
|
|
case 0x2156:
|
|
return (double) 2 / 5;
|
|
case 0x1373:
|
|
case 0x2473:
|
|
case 0x2487:
|
|
case 0x249B:
|
|
case 0x3039:
|
|
return (double) 20;
|
|
case 0x09F6:
|
|
case 0x2162:
|
|
case 0x2172:
|
|
case 0x3023:
|
|
case 0x3282:
|
|
return (double) 3;
|
|
case 0x00BE:
|
|
return (double) 3 / 4;
|
|
case 0x2157:
|
|
return (double) 3 / 5;
|
|
case 0x215C:
|
|
return (double) 3 / 8;
|
|
case 0x1374:
|
|
case 0x303A:
|
|
return (double) 30;
|
|
case 0x09F7:
|
|
case 0x2163:
|
|
case 0x2173:
|
|
case 0x3024:
|
|
case 0x3283:
|
|
return (double) 4;
|
|
case 0x2158:
|
|
return (double) 4 / 5;
|
|
case 0x1375:
|
|
return (double) 40;
|
|
case 0x2164:
|
|
case 0x2174:
|
|
case 0x3025:
|
|
case 0x3284:
|
|
return (double) 5;
|
|
case 0x215A:
|
|
return (double) 5 / 6;
|
|
case 0x215D:
|
|
return (double) 5 / 8;
|
|
case 0x1376:
|
|
case 0x216C:
|
|
case 0x217C:
|
|
return (double) 50;
|
|
case 0x216E:
|
|
case 0x217E:
|
|
return (double) 500;
|
|
case 0x2181:
|
|
return (double) 5000;
|
|
case 0x2165:
|
|
case 0x2175:
|
|
case 0x3026:
|
|
case 0x3285:
|
|
return (double) 6;
|
|
case 0x1377:
|
|
return (double) 60;
|
|
case 0x2166:
|
|
case 0x2176:
|
|
case 0x3027:
|
|
case 0x3286:
|
|
return (double) 7;
|
|
case 0x215E:
|
|
return (double) 7 / 8;
|
|
case 0x1378:
|
|
return (double) 70;
|
|
case 0x2167:
|
|
case 0x2177:
|
|
case 0x3028:
|
|
case 0x3287:
|
|
return (double) 8;
|
|
case 0x1379:
|
|
return (double) 80;
|
|
case 0x2168:
|
|
case 0x2178:
|
|
case 0x3029:
|
|
case 0x3288:
|
|
return (double) 9;
|
|
case 0x137A:
|
|
return (double) 90;
|
|
default:
|
|
return (double) _PyUnicode_ToDigit(ch);
|
|
}
|
|
}
|
|
|
|
int _PyUnicode_IsNumeric(register const Py_UNICODE ch)
|
|
{
|
|
if (_PyUnicode_ToNumeric(ch) < 0.0)
|
|
return 0;
|
|
return 1;
|
|
}
|
|
|
|
#ifndef WANT_WCTYPE_FUNCTIONS
|
|
|
|
/* Returns 1 for Unicode characters having the bidirectional type
|
|
'WS', 'B' or 'S' or the category 'Zs', 0 otherwise. */
|
|
|
|
int _PyUnicode_IsWhitespace(register const Py_UNICODE ch)
|
|
{
|
|
const _PyUnicode_TypeRecord *ctype = gettyperecord(ch);
|
|
|
|
return (ctype->flags & SPACE_MASK) != 0;
|
|
}
|
|
|
|
/* Returns 1 for Unicode characters having the category 'Ll', 0
|
|
otherwise. */
|
|
|
|
int _PyUnicode_IsLowercase(register const Py_UNICODE ch)
|
|
{
|
|
const _PyUnicode_TypeRecord *ctype = gettyperecord(ch);
|
|
|
|
return (ctype->flags & LOWER_MASK) != 0;
|
|
}
|
|
|
|
/* Returns 1 for Unicode characters having the category 'Lu', 0
|
|
otherwise. */
|
|
|
|
int _PyUnicode_IsUppercase(register const Py_UNICODE ch)
|
|
{
|
|
const _PyUnicode_TypeRecord *ctype = gettyperecord(ch);
|
|
|
|
return (ctype->flags & UPPER_MASK) != 0;
|
|
}
|
|
|
|
/* Returns the uppercase Unicode characters corresponding to ch or just
|
|
ch if no uppercase mapping is known. */
|
|
|
|
Py_UNICODE _PyUnicode_ToUppercase(register Py_UNICODE ch)
|
|
{
|
|
const _PyUnicode_TypeRecord *ctype = gettyperecord(ch);
|
|
|
|
ch += ctype->upper;
|
|
#ifdef Py_UNICODE_WIDE
|
|
/* The database assumes that the values wrap around at 0x10000. */
|
|
if (ch > 0x10000)
|
|
ch -= 0x10000;
|
|
#endif
|
|
return ch;
|
|
}
|
|
|
|
/* Returns the lowercase Unicode characters corresponding to ch or just
|
|
ch if no lowercase mapping is known. */
|
|
|
|
Py_UNICODE _PyUnicode_ToLowercase(register Py_UNICODE ch)
|
|
{
|
|
const _PyUnicode_TypeRecord *ctype = gettyperecord(ch);
|
|
|
|
ch += ctype->lower;
|
|
#ifdef Py_UNICODE_WIDE
|
|
/* The database assumes that the values wrap around at 0x10000. */
|
|
if (ch > 0x10000)
|
|
ch -= 0x10000;
|
|
#endif
|
|
return ch;
|
|
}
|
|
|
|
/* Returns 1 for Unicode characters having the category 'Ll', 'Lu', 'Lt',
|
|
'Lo' or 'Lm', 0 otherwise. */
|
|
|
|
int _PyUnicode_IsAlpha(register const Py_UNICODE ch)
|
|
{
|
|
const _PyUnicode_TypeRecord *ctype = gettyperecord(ch);
|
|
|
|
return (ctype->flags & ALPHA_MASK) != 0;
|
|
}
|
|
|
|
#else
|
|
|
|
/* Export the interfaces using the wchar_t type for portability
|
|
reasons: */
|
|
|
|
int _PyUnicode_IsWhitespace(register const Py_UNICODE ch)
|
|
{
|
|
return iswspace(ch);
|
|
}
|
|
|
|
int _PyUnicode_IsLowercase(register const Py_UNICODE ch)
|
|
{
|
|
return iswlower(ch);
|
|
}
|
|
|
|
int _PyUnicode_IsUppercase(register const Py_UNICODE ch)
|
|
{
|
|
return iswupper(ch);
|
|
}
|
|
|
|
Py_UNICODE _PyUnicode_ToLowercase(register const Py_UNICODE ch)
|
|
{
|
|
return towlower(ch);
|
|
}
|
|
|
|
Py_UNICODE _PyUnicode_ToUppercase(register const Py_UNICODE ch)
|
|
{
|
|
return towupper(ch);
|
|
}
|
|
|
|
int _PyUnicode_IsAlpha(register const Py_UNICODE ch)
|
|
{
|
|
return iswalpha(ch);
|
|
}
|
|
|
|
#endif
|