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cpython/Objects/unicodectype.c
Martin v. Löwis 71efeb7cbf Merged revisions 71947 via svnmerge from 
svn+ssh://pythondev@svn.python.org/python/trunk

........
  r71947 | martin.v.loewis | 2009-04-26 02:53:18 +0200 (So, 26 Apr 2009) | 3 lines

  Issue #4971: Fix titlecase for characters that are their own
  titlecase, but not their own uppercase.
........
2009-04-26 01:02:07 +00:00

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/*
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
#define XID_START_MASK 0x100
#define XID_CONTINUE_MASK 0x200
#define PRINTABLE_MASK 0x400
#define NODELTA_MASK 0x800
typedef struct {
const Py_UNICODE upper;
const Py_UNICODE lower;
const Py_UNICODE title;
const unsigned char decimal;
const unsigned char digit;
const unsigned short flags;
} _PyUnicode_TypeRecord;
#include "unicodetype_db.h"
static const _PyUnicode_TypeRecord *
gettyperecord(Py_UNICODE code)
{
int index;
#ifdef Py_UNICODE_WIDE
if (code >= 0x110000)
index = 0;
else
#endif
{
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', 'Zp' or
type 'B', 0 otherwise. */
int _PyUnicode_IsLinebreak(register const Py_UNICODE ch)
{
switch (ch) {
case 0x000A: /* LINE FEED */
case 0x000D: /* CARRIAGE RETURN */
case 0x001C: /* FILE SEPARATOR */
case 0x001D: /* GROUP SEPARATOR */
case 0x001E: /* RECORD SEPARATOR */
case 0x0085: /* NEXT LINE */
case 0x2028: /* LINE SEPARATOR */
case 0x2029: /* PARAGRAPH SEPARATOR */
return 1;
default:
return 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);
int delta = ctype->title;
if (ctype->flags & NODELTA_MASK)
return delta;
if (delta >= 32768)
delta -= 65536;
return ch + delta;
}
/* Returns 1 for Unicode characters having the category 'Lt', 0
otherwise. */
int _PyUnicode_IsTitlecase(Py_UNICODE ch)
{
const _PyUnicode_TypeRecord *ctype = gettyperecord(ch);
return (ctype->flags & TITLE_MASK) != 0;
}
/* Returns 1 for Unicode characters having the XID_Start property, 0
otherwise. */
int _PyUnicode_IsXidStart(Py_UNICODE ch)
{
const _PyUnicode_TypeRecord *ctype = gettyperecord(ch);
return (ctype->flags & XID_START_MASK) != 0;
}
/* Returns 1 for Unicode characters having the XID_Continue property,
0 otherwise. */
int _PyUnicode_IsXidContinue(Py_UNICODE ch)
{
const _PyUnicode_TypeRecord *ctype = gettyperecord(ch);
return (ctype->flags & XID_CONTINUE_MASK) != 0;
}
/* Returns the integer decimal (0-9) for Unicode characters having
this property, -1 otherwise. */
int _PyUnicode_ToDecimalDigit(Py_UNICODE ch)
{
const _PyUnicode_TypeRecord *ctype = gettyperecord(ch);
return (ctype->flags & DECIMAL_MASK) ? ctype->decimal : -1;
}
int _PyUnicode_IsDecimalDigit(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(Py_UNICODE ch)
{
const _PyUnicode_TypeRecord *ctype = gettyperecord(ch);
return (ctype->flags & DIGIT_MASK) ? ctype->digit : -1;
}
int _PyUnicode_IsDigit(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(Py_UNICODE ch)
{
switch (ch) {
case 0x0F33:
return (double) -1 / 2;
case 0x17F0:
case 0x3007:
#ifdef Py_UNICODE_WIDE
case 0x1018A:
#endif
return (double) 0;
case 0x09F4:
case 0x17F1:
case 0x215F:
case 0x2160:
case 0x2170:
case 0x3021:
case 0x3192:
case 0x3220:
case 0x3280:
#ifdef Py_UNICODE_WIDE
case 0x10107:
case 0x10142:
case 0x10158:
case 0x10159:
case 0x1015A:
case 0x10320:
case 0x103D1:
#endif
return (double) 1;
case 0x00BD:
case 0x0F2A:
case 0x2CFD:
#ifdef Py_UNICODE_WIDE
case 0x10141:
case 0x10175:
case 0x10176:
#endif
return (double) 1 / 2;
case 0x2153:
return (double) 1 / 3;
case 0x00BC:
#ifdef Py_UNICODE_WIDE
case 0x10140:
#endif
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 0x24FE:
case 0x277F:
case 0x2789:
case 0x2793:
case 0x3038:
case 0x3229:
case 0x3289:
#ifdef Py_UNICODE_WIDE
case 0x10110:
case 0x10149:
case 0x10150:
case 0x10157:
case 0x10160:
case 0x10161:
case 0x10162:
case 0x10163:
case 0x10164:
case 0x10322:
case 0x103D3:
case 0x10A44:
#endif
return (double) 10;
case 0x0BF1:
case 0x137B:
case 0x216D:
case 0x217D:
#ifdef Py_UNICODE_WIDE
case 0x10119:
case 0x1014B:
case 0x10152:
case 0x1016A:
case 0x103D5:
case 0x10A46:
#endif
return (double) 100;
case 0x0BF2:
case 0x216F:
case 0x217F:
case 0x2180:
#ifdef Py_UNICODE_WIDE
case 0x10122:
case 0x1014D:
case 0x10154:
case 0x10171:
case 0x10A47:
#endif
return (double) 1000;
case 0x137C:
case 0x2182:
#ifdef Py_UNICODE_WIDE
case 0x1012B:
case 0x10155:
#endif
return (double) 10000;
case 0x216A:
case 0x217A:
case 0x246A:
case 0x247E:
case 0x2492:
case 0x24EB:
return (double) 11;
case 0x0F2F:
return (double) 11 / 2;
case 0x216B:
case 0x217B:
case 0x246B:
case 0x247F:
case 0x2493:
case 0x24EC:
return (double) 12;
case 0x246C:
case 0x2480:
case 0x2494:
case 0x24ED:
return (double) 13;
case 0x0F30:
return (double) 13 / 2;
case 0x246D:
case 0x2481:
case 0x2495:
case 0x24EE:
return (double) 14;
case 0x246E:
case 0x2482:
case 0x2496:
case 0x24EF:
return (double) 15;
case 0x0F31:
return (double) 15 / 2;
case 0x09F9:
case 0x246F:
case 0x2483:
case 0x2497:
case 0x24F0:
return (double) 16;
case 0x16EE:
case 0x2470:
case 0x2484:
case 0x2498:
case 0x24F1:
return (double) 17;
case 0x0F32:
return (double) 17 / 2;
case 0x16EF:
case 0x2471:
case 0x2485:
case 0x2499:
case 0x24F2:
return (double) 18;
case 0x16F0:
case 0x2472:
case 0x2486:
case 0x249A:
case 0x24F3:
return (double) 19;
case 0x09F5:
case 0x17F2:
case 0x2161:
case 0x2171:
case 0x3022:
case 0x3193:
case 0x3221:
case 0x3281:
#ifdef Py_UNICODE_WIDE
case 0x10108:
case 0x1015B:
case 0x1015C:
case 0x1015D:
case 0x1015E:
case 0x103D2:
#endif
return (double) 2;
case 0x2154:
#ifdef Py_UNICODE_WIDE
case 0x10177:
#endif
return (double) 2 / 3;
case 0x2156:
return (double) 2 / 5;
case 0x1373:
case 0x2473:
case 0x2487:
case 0x249B:
case 0x24F4:
case 0x3039:
#ifdef Py_UNICODE_WIDE
case 0x10111:
case 0x103D4:
case 0x10A45:
#endif
return (double) 20;
#ifdef Py_UNICODE_WIDE
case 0x1011A:
return (double) 200;
case 0x10123:
return (double) 2000;
case 0x1012C:
return (double) 20000;
#endif
case 0x3251:
return (double) 21;
case 0x3252:
return (double) 22;
case 0x3253:
return (double) 23;
case 0x3254:
return (double) 24;
case 0x3255:
return (double) 25;
case 0x3256:
return (double) 26;
case 0x3257:
return (double) 27;
case 0x3258:
return (double) 28;
case 0x3259:
return (double) 29;
case 0x09F6:
case 0x17F3:
case 0x2162:
case 0x2172:
case 0x3023:
case 0x3194:
case 0x3222:
case 0x3282:
#ifdef Py_UNICODE_WIDE
case 0x10109:
#endif
return (double) 3;
case 0x0F2B:
return (double) 3 / 2;
case 0x00BE:
#ifdef Py_UNICODE_WIDE
case 0x10178:
#endif
return (double) 3 / 4;
case 0x2157:
return (double) 3 / 5;
case 0x215C:
return (double) 3 / 8;
case 0x1374:
case 0x303A:
case 0x325A:
#ifdef Py_UNICODE_WIDE
case 0x10112:
case 0x10165:
#endif
return (double) 30;
#ifdef Py_UNICODE_WIDE
case 0x1011B:
case 0x1016B:
return (double) 300;
case 0x10124:
return (double) 3000;
case 0x1012D:
return (double) 30000;
#endif
case 0x325B:
return (double) 31;
case 0x325C:
return (double) 32;
case 0x325D:
return (double) 33;
case 0x325E:
return (double) 34;
case 0x325F:
return (double) 35;
case 0x32B1:
return (double) 36;
case 0x32B2:
return (double) 37;
case 0x32B3:
return (double) 38;
case 0x32B4:
return (double) 39;
case 0x09F7:
case 0x17F4:
case 0x2163:
case 0x2173:
case 0x3024:
case 0x3195:
case 0x3223:
case 0x3283:
#ifdef Py_UNICODE_WIDE
case 0x1010A:
#endif
return (double) 4;
case 0x2158:
return (double) 4 / 5;
case 0x1375:
case 0x32B5:
#ifdef Py_UNICODE_WIDE
case 0x10113:
#endif
return (double) 40;
#ifdef Py_UNICODE_WIDE
case 0x1011C:
return (double) 400;
case 0x10125:
return (double) 4000;
case 0x1012E:
return (double) 40000;
#endif
case 0x32B6:
return (double) 41;
case 0x32B7:
return (double) 42;
case 0x32B8:
return (double) 43;
case 0x32B9:
return (double) 44;
case 0x32BA:
return (double) 45;
case 0x32BB:
return (double) 46;
case 0x32BC:
return (double) 47;
case 0x32BD:
return (double) 48;
case 0x32BE:
return (double) 49;
case 0x17F5:
case 0x2164:
case 0x2174:
case 0x3025:
case 0x3224:
case 0x3284:
#ifdef Py_UNICODE_WIDE
case 0x1010B:
case 0x10143:
case 0x10148:
case 0x1014F:
case 0x1015F:
case 0x10173:
case 0x10321:
#endif
return (double) 5;
case 0x0F2C:
return (double) 5 / 2;
case 0x215A:
return (double) 5 / 6;
case 0x215D:
return (double) 5 / 8;
case 0x1376:
case 0x216C:
case 0x217C:
case 0x32BF:
#ifdef Py_UNICODE_WIDE
case 0x10114:
case 0x10144:
case 0x1014A:
case 0x10151:
case 0x10166:
case 0x10167:
case 0x10168:
case 0x10169:
case 0x10174:
case 0x10323:
#endif
return (double) 50;
case 0x216E:
case 0x217E:
#ifdef Py_UNICODE_WIDE
case 0x1011D:
case 0x10145:
case 0x1014C:
case 0x10153:
case 0x1016C:
case 0x1016D:
case 0x1016E:
case 0x1016F:
case 0x10170:
#endif
return (double) 500;
case 0x2181:
#ifdef Py_UNICODE_WIDE
case 0x10126:
case 0x10146:
case 0x1014E:
case 0x10172:
#endif
return (double) 5000;
#ifdef Py_UNICODE_WIDE
case 0x1012F:
case 0x10147:
case 0x10156:
return (double) 50000;
#endif
case 0x17F6:
case 0x2165:
case 0x2175:
case 0x3026:
case 0x3225:
case 0x3285:
#ifdef Py_UNICODE_WIDE
case 0x1010C:
#endif
return (double) 6;
case 0x1377:
#ifdef Py_UNICODE_WIDE
case 0x10115:
#endif
return (double) 60;
#ifdef Py_UNICODE_WIDE
case 0x1011E:
return (double) 600;
case 0x10127:
return (double) 6000;
case 0x10130:
return (double) 60000;
#endif
case 0x17F7:
case 0x2166:
case 0x2176:
case 0x3027:
case 0x3226:
case 0x3286:
#ifdef Py_UNICODE_WIDE
case 0x1010D:
#endif
return (double) 7;
case 0x0F2D:
return (double) 7 / 2;
case 0x215E:
return (double) 7 / 8;
case 0x1378:
#ifdef Py_UNICODE_WIDE
case 0x10116:
#endif
return (double) 70;
#ifdef Py_UNICODE_WIDE
case 0x1011F:
return (double) 700;
case 0x10128:
return (double) 7000;
case 0x10131:
return (double) 70000;
#endif
case 0x17F8:
case 0x2167:
case 0x2177:
case 0x3028:
case 0x3227:
case 0x3287:
#ifdef Py_UNICODE_WIDE
case 0x1010E:
#endif
return (double) 8;
case 0x1379:
#ifdef Py_UNICODE_WIDE
case 0x10117:
#endif
return (double) 80;
#ifdef Py_UNICODE_WIDE
case 0x10120:
return (double) 800;
case 0x10129:
return (double) 8000;
case 0x10132:
return (double) 80000;
#endif
case 0x17F9:
case 0x2168:
case 0x2178:
case 0x3029:
case 0x3228:
case 0x3288:
#ifdef Py_UNICODE_WIDE
case 0x1010F:
#endif
return (double) 9;
case 0x0F2E:
return (double) 9 / 2;
case 0x137A:
#ifdef Py_UNICODE_WIDE
case 0x10118:
#endif
return (double) 90;
#ifdef Py_UNICODE_WIDE
case 0x10121:
case 0x1034A:
return (double) 900;
case 0x1012A:
return (double) 9000;
case 0x10133:
return (double) 90000;
#endif
default:
return (double) _PyUnicode_ToDigit(ch);
}
}
int _PyUnicode_IsNumeric(Py_UNICODE ch)
{
return _PyUnicode_ToNumeric(ch) != -1.0;
}
/* Returns 1 for Unicode characters to be hex-escaped when repr()ed,
0 otherwise.
All characters except those characters defined in the Unicode character
database as following categories are considered printable.
* Cc (Other, Control)
* Cf (Other, Format)
* Cs (Other, Surrogate)
* Co (Other, Private Use)
* Cn (Other, Not Assigned)
* Zl Separator, Line ('\u2028', LINE SEPARATOR)
* Zp Separator, Paragraph ('\u2029', PARAGRAPH SEPARATOR)
* Zs (Separator, Space) other than ASCII space('\x20').
*/
int _PyUnicode_IsPrintable(Py_UNICODE ch)
{
const _PyUnicode_TypeRecord *ctype = gettyperecord(ch);
return (ctype->flags & PRINTABLE_MASK) != 0;
}
#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)
{
switch (ch) {
case 0x0009: /* HORIZONTAL TABULATION */
case 0x000A: /* LINE FEED */
case 0x000B: /* VERTICAL TABULATION */
case 0x000C: /* FORM FEED */
case 0x000D: /* CARRIAGE RETURN */
case 0x001C: /* FILE SEPARATOR */
case 0x001D: /* GROUP SEPARATOR */
case 0x001E: /* RECORD SEPARATOR */
case 0x001F: /* UNIT SEPARATOR */
case 0x0020: /* SPACE */
case 0x0085: /* NEXT LINE */
case 0x00A0: /* NO-BREAK SPACE */
case 0x1680: /* OGHAM SPACE MARK */
case 0x2000: /* EN QUAD */
case 0x2001: /* EM QUAD */
case 0x2002: /* EN SPACE */
case 0x2003: /* EM SPACE */
case 0x2004: /* THREE-PER-EM SPACE */
case 0x2005: /* FOUR-PER-EM SPACE */
case 0x2006: /* SIX-PER-EM SPACE */
case 0x2007: /* FIGURE SPACE */
case 0x2008: /* PUNCTUATION SPACE */
case 0x2009: /* THIN SPACE */
case 0x200A: /* HAIR SPACE */
case 0x200B: /* ZERO WIDTH SPACE */
case 0x2028: /* LINE SEPARATOR */
case 0x2029: /* PARAGRAPH SEPARATOR */
case 0x202F: /* NARROW NO-BREAK SPACE */
case 0x205F: /* MEDIUM MATHEMATICAL SPACE */
case 0x3000: /* IDEOGRAPHIC SPACE */
return 1;
default:
return 0;
}
}
/* Returns 1 for Unicode characters having the category 'Ll', 0
otherwise. */
int _PyUnicode_IsLowercase(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(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(Py_UNICODE ch)
{
const _PyUnicode_TypeRecord *ctype = gettyperecord(ch);
int delta = ctype->upper;
if (ctype->flags & NODELTA_MASK)
return delta;
if (delta >= 32768)
delta -= 65536;
return ch + delta;
}
/* Returns the lowercase Unicode characters corresponding to ch or just
ch if no lowercase mapping is known. */
Py_UNICODE _PyUnicode_ToLowercase(Py_UNICODE ch)
{
const _PyUnicode_TypeRecord *ctype = gettyperecord(ch);
int delta = ctype->lower;
if (ctype->flags & NODELTA_MASK)
return delta;
if (delta >= 32768)
delta -= 65536;
return ch + delta;
}
/* Returns 1 for Unicode characters having the category 'Ll', 'Lu', 'Lt',
'Lo' or 'Lm', 0 otherwise. */
int _PyUnicode_IsAlpha(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(Py_UNICODE ch)
{
return iswspace(ch);
}
int _PyUnicode_IsLowercase(Py_UNICODE ch)
{
return iswlower(ch);
}
int _PyUnicode_IsUppercase(Py_UNICODE ch)
{
return iswupper(ch);
}
Py_UNICODE _PyUnicode_ToLowercase(Py_UNICODE ch)
{
return towlower(ch);
}
Py_UNICODE _PyUnicode_ToUppercase(Py_UNICODE ch)
{
return towupper(ch);
}
int _PyUnicode_IsAlpha(Py_UNICODE ch)
{
return iswalpha(ch);
}
#endif
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