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