lib/perl5/5.6.1/msys/CORE/utf8.h

   1 /*    utf8.h
   2  *
   3  *    Copyright (c) 1998-2001, Larry Wall
   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
  10 START_EXTERN_C
  11
  12 #ifdef DOINIT
  13 EXTCONST unsigned char PL_utf8skip[] = {
  14 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 */
  15 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 */
  16 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 */
  17 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 */
  18 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 */
  19 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 */
  20 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 */
  21 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. */
  22 7,13, /* Perl extended (not UTF-8).  Up to 72bit allowed (64-bit + reserved). */
  23 };
  24 #else
  25 EXTCONST unsigned char PL_utf8skip[];
  26 #endif
  27
  28 END_EXTERN_C
  29
  30 #define UTF8_MAXLEN 13 /* how wide can a single UTF8 encoded character become */
  31
  32 /* #define IN_UTF8 (PL_curcop->op_private & HINT_UTF8) */
  33 #define IN_BYTE (PL_curcop->op_private & HINT_BYTE)
  34 #define DO_UTF8(sv) (SvUTF8(sv) && !IN_BYTE)
  35
  36 #define UTF8_ALLOW_EMPTY                0x0001
  37 #define UTF8_ALLOW_CONTINUATION         0x0002
  38 #define UTF8_ALLOW_NON_CONTINUATION     0x0004
  39 #define UTF8_ALLOW_FE_FF                0x0008
  40 #define UTF8_ALLOW_SHORT                0x0010
  41 #define UTF8_ALLOW_SURROGATE            0x0020
  42 #define UTF8_ALLOW_BOM                  0x0040
  43 #define UTF8_ALLOW_FFFF                 0x0080
  44 #define UTF8_ALLOW_LONG                 0x0100
  45 #define UTF8_ALLOW_ANYUV                (UTF8_ALLOW_EMPTY|UTF8_ALLOW_FE_FF|\
  46                                          UTF8_ALLOW_SURROGATE|UTF8_ALLOW_BOM|\
  47                                          UTF8_ALLOW_FFFF|UTF8_ALLOW_LONG)
  48 #define UTF8_ALLOW_ANY                  0x00ff
  49 #define UTF8_CHECK_ONLY                 0x0100
  50
  51 #define UNICODE_SURROGATE_FIRST         0xd800
  52 #define UNICODE_SURROGATE_LAST          0xdfff
  53 #define UNICODE_REPLACEMENT             0xfffd
  54 #define UNICODE_BYTER_ORDER_MARK        0xfffe
  55 #define UNICODE_ILLEGAL                 0xffff
  56
  57 #define UNICODE_IS_SURROGATE(c)         ((c) >= UNICODE_SURROGATE_FIRST && \
  58                                          (c) <= UNICODE_SURROGATE_LAST)
  59 #define UNICODE_IS_REPLACEMENT(c)       ((c) == UNICODE_REPLACMENT)
  60 #define UNICODE_IS_BYTE_ORDER_MARK(c)   ((c) == UNICODE_BYTER_ORDER_MARK)
  61 #define UNICODE_IS_ILLEGAL(c)           ((c) == UNICODE_ILLEGAL)
  62
  63 #define UTF8SKIP(s) PL_utf8skip[*(U8*)s]
  64
  65 #define UTF8_QUAD_MAX   UINT64_C(0x1000000000)
  66
  67 /*
  68
  69  The following table is from Unicode 3.1.
  70
  71  Code Points            1st Byte  2nd Byte  3rd Byte  4th Byte
  72
  73    U+0000..U+007F       00..7F
  74    U+0080..U+07FF       C2..DF    80..BF
  75    U+0800..U+0FFF       E0        A0..BF    80..BF
  76    U+1000..U+FFFF       E1..EF    80..BF    80..BF
  77   U+10000..U+3FFFF      F0        90..BF    80..BF    80..BF
  78   U+40000..U+FFFFF      F1..F3    80..BF    80..BF    80..BF
  79  U+100000..U+10FFFF     F4        80..8F    80..BF    80..BF
  80
  81  */
  82
  83 #define UTF8_IS_ASCII(c)                (((U8)c) <  0x80)
  84 #define UTF8_IS_START(c)                (((U8)c) >= 0xc0 && (((U8)c) <= 0xfd))
  85 #define UTF8_IS_CONTINUATION(c)         (((U8)c) >= 0x80 && (((U8)c) <= 0xbf))
  86 #define UTF8_IS_CONTINUED(c)            (((U8)c) &  0x80)
  87 #define UTF8_IS_DOWNGRADEABLE_START(c)  (((U8)c & 0xfc) != 0xc0)
  88
  89 #define UTF8_CONTINUATION_MASK          ((U8)0x3f)
  90 #define UTF8_ACCUMULATION_SHIFT         6
  91 #define UTF8_ACCUMULATE(old, new)       (((old) << UTF8_ACCUMULATION_SHIFT) | (((U8)new) & UTF8_CONTINUATION_MASK))
  92
  93 #define UTF8_EIGHT_BIT_HI(c)    ( (((U8)(c))>>6)      |0xc0)
  94 #define UTF8_EIGHT_BIT_LO(c)    (((((U8)(c))   )&0x3f)|0x80)
  95
  96 #ifdef HAS_QUAD
  97 #define UNISKIP(uv) ( (uv) < 0x80           ? 1 : \
  98                       (uv) < 0x800          ? 2 : \
  99                       (uv) < 0x10000        ? 3 : \
 100                       (uv) < 0x200000       ? 4 : \
 101                       (uv) < 0x4000000      ? 5 : \
 102                       (uv) < 0x80000000     ? 6 : \
 103                       (uv) < UTF8_QUAD_MAX ? 7 : 13 )
 104 #else
 105 /* No, I'm not even going to *TRY* putting #ifdef inside a #define */
 106 #define UNISKIP(uv) ( (uv) < 0x80           ? 1 : \
 107                       (uv) < 0x800          ? 2 : \
 108                       (uv) < 0x10000        ? 3 : \
 109                       (uv) < 0x200000       ? 4 : \
 110                       (uv) < 0x4000000      ? 5 : \
 111                       (uv) < 0x80000000     ? 6 : 7 )
 112 #endif
 113
 114
 115 /*
 116  * Note: we try to be careful never to call the isXXX_utf8() functions
 117  * unless we're pretty sure we've seen the beginning of a UTF-8 character
 118  * (that is, the two high bits are set).  Otherwise we risk loading in the
 119  * heavy-duty SWASHINIT and SWASHGET routines unnecessarily.
 120  */
 121 #ifdef EBCDIC
 122 #define isIDFIRST_lazy_if(p,c) isIDFIRST(*(p))
 123 #define isALNUM_lazy_if(p,c)   isALNUM(*(p))
 124 #else
 125 #define isIDFIRST_lazy_if(p,c) ((IN_BYTE || (!c || (*((U8*)p) < 0xc0))) \
 126                                 ? isIDFIRST(*(p)) \
 127                                 : isIDFIRST_utf8((U8*)p))
 128 #define isALNUM_lazy_if(p,c)   ((IN_BYTE || (!c || (*((U8*)p) < 0xc0))) \
 129                                 ? isALNUM(*(p)) \
 130                                 : isALNUM_utf8((U8*)p))
 131 #endif
 132 #define isIDFIRST_lazy(p)       isIDFIRST_lazy_if(p,1)
 133 #define isALNUM_lazy(p)         isALNUM_lazy_if(p,1)