134 lines
4.7 KiB
C
134 lines
4.7 KiB
C
/* utf8.h
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*
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* Copyright (c) 1998-2001, Larry Wall
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*
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* You may distribute under the terms of either the GNU General Public
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* License or the Artistic License, as specified in the README file.
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*
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*/
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START_EXTERN_C
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#ifdef DOINIT
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EXTCONST unsigned char PL_utf8skip[] = {
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1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, /* ascii */
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1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, /* ascii */
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1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, /* ascii */
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1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, /* ascii */
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1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, /* bogus */
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1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, /* bogus */
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2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2, /* scripts */
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3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,4,4,4,4,4,4,4,4,5,5,5,5,6,6, /* cjk etc. */
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7,13, /* Perl extended (not UTF-8). Up to 72bit allowed (64-bit + reserved). */
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};
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#else
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EXTCONST unsigned char PL_utf8skip[];
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#endif
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END_EXTERN_C
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#define UTF8_MAXLEN 13 /* how wide can a single UTF8 encoded character become */
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/* #define IN_UTF8 (PL_curcop->op_private & HINT_UTF8) */
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#define IN_BYTE (PL_curcop->op_private & HINT_BYTE)
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#define DO_UTF8(sv) (SvUTF8(sv) && !IN_BYTE)
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#define UTF8_ALLOW_EMPTY 0x0001
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#define UTF8_ALLOW_CONTINUATION 0x0002
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#define UTF8_ALLOW_NON_CONTINUATION 0x0004
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#define UTF8_ALLOW_FE_FF 0x0008
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#define UTF8_ALLOW_SHORT 0x0010
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#define UTF8_ALLOW_SURROGATE 0x0020
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#define UTF8_ALLOW_BOM 0x0040
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#define UTF8_ALLOW_FFFF 0x0080
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#define UTF8_ALLOW_LONG 0x0100
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#define UTF8_ALLOW_ANYUV (UTF8_ALLOW_EMPTY|UTF8_ALLOW_FE_FF|\
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UTF8_ALLOW_SURROGATE|UTF8_ALLOW_BOM|\
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UTF8_ALLOW_FFFF|UTF8_ALLOW_LONG)
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#define UTF8_ALLOW_ANY 0x00ff
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#define UTF8_CHECK_ONLY 0x0100
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#define UNICODE_SURROGATE_FIRST 0xd800
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#define UNICODE_SURROGATE_LAST 0xdfff
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#define UNICODE_REPLACEMENT 0xfffd
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#define UNICODE_BYTER_ORDER_MARK 0xfffe
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#define UNICODE_ILLEGAL 0xffff
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#define UNICODE_IS_SURROGATE(c) ((c) >= UNICODE_SURROGATE_FIRST && \
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(c) <= UNICODE_SURROGATE_LAST)
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#define UNICODE_IS_REPLACEMENT(c) ((c) == UNICODE_REPLACMENT)
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#define UNICODE_IS_BYTE_ORDER_MARK(c) ((c) == UNICODE_BYTER_ORDER_MARK)
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#define UNICODE_IS_ILLEGAL(c) ((c) == UNICODE_ILLEGAL)
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#define UTF8SKIP(s) PL_utf8skip[*(U8*)s]
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#define UTF8_QUAD_MAX UINT64_C(0x1000000000)
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/*
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The following table is from Unicode 3.1.
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Code Points 1st Byte 2nd Byte 3rd Byte 4th Byte
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U+0000..U+007F 00..7F<EFBFBD><EFBFBD><EFBFBD>
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U+0080..U+07FF C2..DF 80..BF<42><46><EFBFBD>
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U+0800..U+0FFF E0 A0..BF 80..BF<42><46>
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U+1000..U+FFFF E1..EF 80..BF 80..BF<42><46>
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U+10000..U+3FFFF F0 90..BF 80..BF 80..BF
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U+40000..U+FFFFF F1..F3 80..BF 80..BF 80..BF
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U+100000..U+10FFFF F4 80..8F 80..BF 80..BF
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*/
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#define UTF8_IS_ASCII(c) (((U8)c) < 0x80)
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#define UTF8_IS_START(c) (((U8)c) >= 0xc0 && (((U8)c) <= 0xfd))
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#define UTF8_IS_CONTINUATION(c) (((U8)c) >= 0x80 && (((U8)c) <= 0xbf))
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#define UTF8_IS_CONTINUED(c) (((U8)c) & 0x80)
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#define UTF8_IS_DOWNGRADEABLE_START(c) (((U8)c & 0xfc) != 0xc0)
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#define UTF8_CONTINUATION_MASK ((U8)0x3f)
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#define UTF8_ACCUMULATION_SHIFT 6
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#define UTF8_ACCUMULATE(old, new) (((old) << UTF8_ACCUMULATION_SHIFT) | (((U8)new) & UTF8_CONTINUATION_MASK))
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#define UTF8_EIGHT_BIT_HI(c) ( (((U8)(c))>>6) |0xc0)
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#define UTF8_EIGHT_BIT_LO(c) (((((U8)(c)) )&0x3f)|0x80)
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#ifdef HAS_QUAD
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#define UNISKIP(uv) ( (uv) < 0x80 ? 1 : \
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(uv) < 0x800 ? 2 : \
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(uv) < 0x10000 ? 3 : \
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(uv) < 0x200000 ? 4 : \
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(uv) < 0x4000000 ? 5 : \
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(uv) < 0x80000000 ? 6 : \
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(uv) < UTF8_QUAD_MAX ? 7 : 13 )
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#else
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/* No, I'm not even going to *TRY* putting #ifdef inside a #define */
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#define UNISKIP(uv) ( (uv) < 0x80 ? 1 : \
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(uv) < 0x800 ? 2 : \
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(uv) < 0x10000 ? 3 : \
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(uv) < 0x200000 ? 4 : \
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(uv) < 0x4000000 ? 5 : \
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(uv) < 0x80000000 ? 6 : 7 )
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#endif
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/*
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* Note: we try to be careful never to call the isXXX_utf8() functions
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* unless we're pretty sure we've seen the beginning of a UTF-8 character
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* (that is, the two high bits are set). Otherwise we risk loading in the
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* heavy-duty SWASHINIT and SWASHGET routines unnecessarily.
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*/
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#ifdef EBCDIC
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#define isIDFIRST_lazy_if(p,c) isIDFIRST(*(p))
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#define isALNUM_lazy_if(p,c) isALNUM(*(p))
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#else
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#define isIDFIRST_lazy_if(p,c) ((IN_BYTE || (!c || (*((U8*)p) < 0xc0))) \
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? isIDFIRST(*(p)) \
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: isIDFIRST_utf8((U8*)p))
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#define isALNUM_lazy_if(p,c) ((IN_BYTE || (!c || (*((U8*)p) < 0xc0))) \
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? isALNUM(*(p)) \
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: isALNUM_utf8((U8*)p))
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#endif
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#define isIDFIRST_lazy(p) isIDFIRST_lazy_if(p,1)
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#define isALNUM_lazy(p) isALNUM_lazy_if(p,1)
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