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[perl5.git] / utf8.h
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1/* utf8.h
2 *
3818b22b 3 * Copyright (c) 1998-2000, Larry Wall
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4 *
5 * You may distribute under the terms of either the GNU General Public
6 * License or the Artistic License, as specified in the README file.
7 *
8 */
9
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10START_EXTERN_C
11
a0ed51b3 12#ifdef DOINIT
6f06b55f 13EXTCONST unsigned char PL_utf8skip[] = {
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141,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, /* ascii */
151,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, /* ascii */
161,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, /* ascii */
171,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, /* ascii */
181,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, /* bogus */
191,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, /* bogus */
202,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2, /* scripts */
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213,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,4,4,4,4,4,4,4,4,5,5,5,5,6,6, /* cjk etc. */
227,13, /* Perl extended (not UTF-8). Up to 72bit allowed (64-bit + reserved). */
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23};
24#else
6f06b55f 25EXTCONST unsigned char PL_utf8skip[];
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26#endif
27
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28END_EXTERN_C
29
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30#define UTF8_MAXLEN 13 /* how wide can a single UTF8 encoded character become */
31
fcc8fcf6 32/* #define IN_UTF8 (PL_curcop->op_private & HINT_UTF8) */
5bc28da9 33#define IN_BYTE (PL_curcop->op_private & HINT_BYTE)
7e2040f0 34#define DO_UTF8(sv) (SvUTF8(sv) && !IN_BYTE)
a0ed51b3 35
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36#define UTF8_ALLOW_CONTINUATION 0x0001
37#define UTF8_ALLOW_NON_CONTINUATION 0x0002
38#define UTF8_ALLOW_FE_FF 0x0004
39#define UTF8_ALLOW_SHORT 0x0008
40#define UTF8_ALLOW_SURROGATE 0x0010
41#define UTF8_ALLOW_BOM 0x0020
42#define UTF8_ALLOW_FFFF 0x0040
43#define UTF8_ALLOW_LONG 0x0080
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44#define UTF8_ALLOW_ANYUV (UTF8_ALLOW_FE_FF|UTF8_ALLOW_FFFF \
45 |UTF8_ALLOW_BOM|UTF8_ALLOW_SURROGATE)
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46#define UTF8_ALLOW_ANY 0x00ff
47#define UTF8_CHECK_ONLY 0x0100
48
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49#define UNICODE_SURROGATE_FIRST 0xd800
50#define UNICODE_SURROGATE_LAST 0xdfff
51#define UNICODE_REPLACEMENT 0xfffd
52#define UNICODE_BYTER_ORDER_MARK 0xfffe
53#define UNICODE_ILLEGAL 0xffff
54
55#define UNICODE_IS_SURROGATE(c) ((c) >= UNICODE_SURROGATE_FIRST && \
56 (c) <= UNICODE_SURROGATE_LAST)
57#define UNICODE_IS_REPLACEMENT(c) ((c) == UNICODE_REPLACMENT)
58#define UNICODE_IS_BYTE_ORDER_MARK(c) ((c) == UNICODE_BYTER_ORDER_MARK)
59#define UNICODE_IS_ILLEGAL(c) ((c) == UNICODE_ILLEGAL)
60
6f06b55f 61#define UTF8SKIP(s) PL_utf8skip[*(U8*)s]
7e2040f0 62
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63#define UTF8_QUAD_MAX UINT64_C(0x1000000000)
64
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65#define UTF8_IS_ASCII(c) ((c) < 0x80)
66#define UTF8_IS_START(c) ((c) >= 0xc0 && ((c) <= 0xfd))
67#define UTF8_IS_CONTINUATION(c) ((c) >= 0x80 && ((c) <= 0xbf))
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68#define UTF8_IS_CONTINUED(c) ((c) & 0x80)
69
70#define UTF8_CONTINUATION_MASK 0x3f
71#define UTF8_ACCUMULATION_SHIFT 6
72#define UTF8_ACCUMULATE(old, new) ((old) << UTF8_ACCUMULATION_SHIFT | ((new) & UTF8_CONTINUATION_MASK))
421a8bf2 73
1d68d6cd 74#ifdef HAS_QUAD
5bbb0b5a 75#define UNISKIP(uv) ( (uv) < 0x80 ? 1 : \
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76 (uv) < 0x800 ? 2 : \
77 (uv) < 0x10000 ? 3 : \
78 (uv) < 0x200000 ? 4 : \
79 (uv) < 0x4000000 ? 5 : \
80 (uv) < 0x80000000 ? 6 : \
d7578b48 81 (uv) < UTF8_QUAD_MAX ? 7 : 13 )
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82#else
83/* No, I'm not even going to *TRY* putting #ifdef inside a #define */
5bbb0b5a 84#define UNISKIP(uv) ( (uv) < 0x80 ? 1 : \
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85 (uv) < 0x800 ? 2 : \
86 (uv) < 0x10000 ? 3 : \
87 (uv) < 0x200000 ? 4 : \
88 (uv) < 0x4000000 ? 5 : \
89 (uv) < 0x80000000 ? 6 : 7 )
90#endif
91
ba210ebe 92
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93/*
94 * Note: we try to be careful never to call the isXXX_utf8() functions
95 * unless we're pretty sure we've seen the beginning of a UTF-8 character
96 * (that is, the two high bits are set). Otherwise we risk loading in the
97 * heavy-duty SWASHINIT and SWASHGET routines unnecessarily.
98 */
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99#ifdef EBCDIC
100#define isIDFIRST_lazy_if(p,c) isIDFIRST(*(p))
101#define isALNUM_lazy_if(p,c) isALNUM(*(p))
102#else
103#define isIDFIRST_lazy_if(p,c) ((IN_BYTE || (!c || (*((U8*)p) < 0xc0))) \
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104 ? isIDFIRST(*(p)) \
105 : isIDFIRST_utf8((U8*)p))
5b154c98 106#define isALNUM_lazy_if(p,c) ((IN_BYTE || (!c || (*((U8*)p) < 0xc0))) \
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107 ? isALNUM(*(p)) \
108 : isALNUM_utf8((U8*)p))
5b154c98 109#endif
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110#define isIDFIRST_lazy(p) isIDFIRST_lazy_if(p,1)
111#define isALNUM_lazy(p) isALNUM_lazy_if(p,1)