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Re: PerlIO - Configure tweak for Linux/glibc?
[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
ba210ebe 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
6f06b55f 36#define UTF8SKIP(s) PL_utf8skip[*(U8*)s]
7e2040f0 37
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38#ifdef HAS_QUAD
39#define UTF8LEN(uv) ( (uv) < 0x80 ? 1 : \
40 (uv) < 0x800 ? 2 : \
41 (uv) < 0x10000 ? 3 : \
42 (uv) < 0x200000 ? 4 : \
43 (uv) < 0x4000000 ? 5 : \
44 (uv) < 0x80000000 ? 6 : \
45 (uv) < 0x1000000000LL ? 7 : 13 )
46#else
47/* No, I'm not even going to *TRY* putting #ifdef inside a #define */
48#define UTF8LEN(uv) ( (uv) < 0x80 ? 1 : \
49 (uv) < 0x800 ? 2 : \
50 (uv) < 0x10000 ? 3 : \
51 (uv) < 0x200000 ? 4 : \
52 (uv) < 0x4000000 ? 5 : \
53 (uv) < 0x80000000 ? 6 : 7 )
54#endif
55
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56#define UNICODE_REPLACEMENT_CHARACTER 0xfffd
57
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58/*
59 * Note: we try to be careful never to call the isXXX_utf8() functions
60 * unless we're pretty sure we've seen the beginning of a UTF-8 character
61 * (that is, the two high bits are set). Otherwise we risk loading in the
62 * heavy-duty SWASHINIT and SWASHGET routines unnecessarily.
63 */
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64#ifdef EBCDIC
65#define isIDFIRST_lazy_if(p,c) isIDFIRST(*(p))
66#define isALNUM_lazy_if(p,c) isALNUM(*(p))
67#else
68#define isIDFIRST_lazy_if(p,c) ((IN_BYTE || (!c || (*((U8*)p) < 0xc0))) \
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69 ? isIDFIRST(*(p)) \
70 : isIDFIRST_utf8((U8*)p))
5b154c98 71#define isALNUM_lazy_if(p,c) ((IN_BYTE || (!c || (*((U8*)p) < 0xc0))) \
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72 ? isALNUM(*(p)) \
73 : isALNUM_utf8((U8*)p))
5b154c98 74#endif
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75#define isIDFIRST_lazy(p) isIDFIRST_lazy_if(p,1)
76#define isALNUM_lazy(p) isALNUM_lazy_if(p,1)