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/se3-unattended/var/se3/unattended/install/linuxaux/opt/perl/lib/5.10.0/i586-linux-thread-multi/CORE/ -> utf8.h (source)

   1  /*    utf8.h
   2   *
   3   *    Copyright (C) 2000, 2001, 2002, 2005, 2006, 2007, by Larry Wall and others
   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  /* Use UTF-8 as the default script encoding?
  11   * Turning this on will break scripts having non-UTF-8 binary
  12   * data (such as Latin-1) in string literals. */
  13  #ifdef USE_UTF8_SCRIPTS
  14  #    define USE_UTF8_IN_NAMES (!IN_BYTES)
  15  #else
  16  #    define USE_UTF8_IN_NAMES (PL_hints & HINT_UTF8)
  17  #endif
  18  
  19  /* Source backward compatibility. */
  20  #define uvuni_to_utf8(d, uv)        uvuni_to_utf8_flags(d, uv, 0)
  21  #define is_utf8_string_loc(s, len, ep)    is_utf8_string_loclen(s, len, ep, 0)
  22  
  23  #ifdef EBCDIC
  24  /* The equivalent of these macros but implementing UTF-EBCDIC
  25     are in the following header file:
  26   */
  27  
  28  #include "utfebcdic.h"
  29  
  30  #else
  31  START_EXTERN_C
  32  
  33  #ifdef DOINIT
  34  EXTCONST unsigned char PL_utf8skip[] = {
  35  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 */
  36  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 */
  37  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 */
  38  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 */
  39  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 */
  40  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 */
  41  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 */
  42  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. */
  43  7,13, /* Perl extended (not UTF-8).  Up to 72bit allowed (64-bit + reserved). */
  44  };
  45  #else
  46  EXTCONST unsigned char PL_utf8skip[];
  47  #endif
  48  
  49  END_EXTERN_C
  50  #define UTF8SKIP(s) PL_utf8skip[*(const U8*)(s)]
  51  
  52  /* Native character to iso-8859-1 */
  53  #define NATIVE_TO_ASCII(ch)      (ch)
  54  #define ASCII_TO_NATIVE(ch)      (ch)
  55  /* Transform after encoding */
  56  #define NATIVE_TO_UTF(ch)        (ch)
  57  #define UTF_TO_NATIVE(ch)        (ch)
  58  /* Transforms in wide UV chars */
  59  #define UNI_TO_NATIVE(ch)        (ch)
  60  #define NATIVE_TO_UNI(ch)        (ch)
  61  /* Transforms in invariant space */
  62  #define NATIVE_TO_NEED(enc,ch)   (ch)
  63  #define ASCII_TO_NEED(enc,ch)    (ch)
  64  
  65  /* As there are no translations avoid the function wrapper */
  66  #define utf8n_to_uvchr utf8n_to_uvuni
  67  #define uvchr_to_utf8  uvuni_to_utf8
  68  
  69  /*
  70  
  71   The following table is from Unicode 3.2.
  72  
  73   Code Points        1st Byte  2nd Byte  3rd Byte  4th Byte
  74  
  75     U+0000..U+007F    00..7F
  76     U+0080..U+07FF    C2..DF    80..BF
  77     U+0800..U+0FFF    E0        A0..BF    80..BF
  78     U+1000..U+CFFF       E1..EC    80..BF    80..BF
  79     U+D000..U+D7FF       ED        80..9F    80..BF
  80     U+D800..U+DFFF       ******* ill-formed *******
  81     U+E000..U+FFFF       EE..EF    80..BF    80..BF
  82    U+10000..U+3FFFF    F0        90..BF    80..BF    80..BF
  83    U+40000..U+FFFFF    F1..F3    80..BF    80..BF    80..BF
  84   U+100000..U+10FFFF    F4        80..8F    80..BF    80..BF
  85  
  86  Note the A0..BF in U+0800..U+0FFF, the 80..9F in U+D000...U+D7FF,
  87  the 90..BF in U+10000..U+3FFFF, and the 80...8F in U+100000..U+10FFFF.
  88  The "gaps" are caused by legal UTF-8 avoiding non-shortest encodings:
  89  it is technically possible to UTF-8-encode a single code point in different
  90  ways, but that is explicitly forbidden, and the shortest possible encoding
  91  should always be used (and that is what Perl does).
  92  
  93   */
  94  
  95  /*
  96   Another way to look at it, as bits:
  97  
  98   Code Points                    1st Byte   2nd Byte  3rd Byte  4th Byte
  99  
 100                      0aaaaaaa     0aaaaaaa
 101              00000bbbbbaaaaaa     110bbbbb  10aaaaaa
 102              ccccbbbbbbaaaaaa     1110cccc  10bbbbbb  10aaaaaa
 103    00000dddccccccbbbbbbaaaaaa     11110ddd  10cccccc  10bbbbbb  10aaaaaa
 104  
 105  As you can see, the continuation bytes all begin with C<10>, and the
 106  leading bits of the start byte tell how many bytes the are in the
 107  encoded character.
 108  
 109  */
 110  
 111  
 112  #define UNI_IS_INVARIANT(c)        (((UV)c) <  0x80)
 113  #define UTF8_IS_INVARIANT(c)        UNI_IS_INVARIANT(NATIVE_TO_UTF(c))
 114  #define NATIVE_IS_INVARIANT(c)        UNI_IS_INVARIANT(NATIVE_TO_ASCII(c))
 115  #define UTF8_IS_START(c)        (((U8)c) >= 0xc0 && (((U8)c) <= 0xfd))
 116  #define UTF8_IS_CONTINUATION(c)        (((U8)c) >= 0x80 && (((U8)c) <= 0xbf))
 117  #define UTF8_IS_CONTINUED(c)         (((U8)c) &  0x80)
 118  #define UTF8_IS_DOWNGRADEABLE_START(c)    (((U8)c & 0xfc) == 0xc0)
 119  
 120  #define UTF_START_MARK(len) ((len >  7) ? 0xFF : (0xFE << (7-len)))
 121  #define UTF_START_MASK(len) ((len >= 7) ? 0x00 : (0x1F >> (len-2)))
 122  
 123  #define UTF_CONTINUATION_MARK        0x80
 124  #define UTF_ACCUMULATION_SHIFT        6
 125  #define UTF_CONTINUATION_MASK        ((U8)0x3f)
 126  #define UTF8_ACCUMULATE(old, new)    (((old) << UTF_ACCUMULATION_SHIFT) | (((U8)new) & UTF_CONTINUATION_MASK))
 127  
 128  #define UTF8_EIGHT_BIT_HI(c)    ((((U8)(c))>>UTF_ACCUMULATION_SHIFT)|UTF_START_MARK(2))
 129  #define UTF8_EIGHT_BIT_LO(c)    (((((U8)(c)))&UTF_CONTINUATION_MASK)|UTF_CONTINUATION_MARK)
 130  
 131  #ifdef HAS_QUAD
 132  #define UNISKIP(uv) ( (uv) < 0x80           ? 1 : \
 133                (uv) < 0x800          ? 2 : \
 134                (uv) < 0x10000        ? 3 : \
 135                (uv) < 0x200000       ? 4 : \
 136                (uv) < 0x4000000      ? 5 : \
 137                (uv) < 0x80000000     ? 6 : \
 138                        (uv) < UTF8_QUAD_MAX ? 7 : 13 )
 139  #else
 140  /* No, I'm not even going to *TRY* putting #ifdef inside a #define */
 141  #define UNISKIP(uv) ( (uv) < 0x80           ? 1 : \
 142                (uv) < 0x800          ? 2 : \
 143                (uv) < 0x10000        ? 3 : \
 144                (uv) < 0x200000       ? 4 : \
 145                (uv) < 0x4000000      ? 5 : \
 146                (uv) < 0x80000000     ? 6 : 7 )
 147  #endif
 148  
 149  /*
 150   * Note: we try to be careful never to call the isXXX_utf8() functions
 151   * unless we're pretty sure we've seen the beginning of a UTF-8 character
 152   * (that is, the two high bits are set).  Otherwise we risk loading in the
 153   * heavy-duty swash_init and swash_fetch routines unnecessarily.
 154   */
 155  #define isIDFIRST_lazy_if(p,c) ((IN_BYTES || (!c || (*((const U8*)p) < 0xc0))) \
 156                  ? isIDFIRST(*(p)) \
 157                  : isIDFIRST_utf8((const U8*)p))
 158  #define isALNUM_lazy_if(p,c)   ((IN_BYTES || (!c || (*((const U8*)p) < 0xc0))) \
 159                  ? isALNUM(*(p)) \
 160                  : isALNUM_utf8((const U8*)p))
 161  
 162  
 163  #endif /* EBCDIC vs ASCII */
 164  
 165  /* Rest of these are attributes of Unicode and perl's internals rather than the encoding */
 166  
 167  #define isIDFIRST_lazy(p)    isIDFIRST_lazy_if(p,1)
 168  #define isALNUM_lazy(p)        isALNUM_lazy_if(p,1)
 169  
 170  #define UTF8_MAXBYTES 13
 171  /* How wide can a single UTF-8 encoded character become in bytes.
 172   * NOTE: Strictly speaking Perl's UTF-8 should not be called UTF-8
 173   * since UTF-8 is an encoding of Unicode and given Unicode's current
 174   * upper limit only four bytes is possible.  Perl thinks of UTF-8
 175   * as a way to encode non-negative integers in a binary format. */
 176  #define UTF8_MAXLEN UTF8_MAXBYTES
 177  
 178  #define UTF8_MAXLEN_UCLC 3        /* Obsolete, do not use. */
 179  #define UTF8_MAXLEN_UCLC_MULT 39    /* Obsolete, do not use. */
 180  #define UTF8_MAXLEN_FOLD 3        /* Obsolete, do not use. */
 181  #define UTF8_MAXLEN_FOLD_MULT 39    /* Obsolete, do not use. */
 182  
 183  /* The maximum number of UTF-8 bytes a single Unicode character can
 184   * uppercase/lowercase/fold into; this number depends on the Unicode
 185   * version.  An example of maximal expansion is the U+03B0 which
 186   * uppercases to U+03C5 U+0308 U+0301.  The Unicode databases that
 187   * tell these things are UnicodeDatabase.txt, CaseFolding.txt, and
 188   * SpecialCasing.txt. */
 189  #define UTF8_MAXBYTES_CASE    6
 190  
 191  #define IN_BYTES (CopHINTS_get(PL_curcop) & HINT_BYTES)
 192  #define DO_UTF8(sv) (SvUTF8(sv) && !IN_BYTES)
 193  
 194  #define UTF8_ALLOW_EMPTY        0x0001
 195  #define UTF8_ALLOW_CONTINUATION        0x0002
 196  #define UTF8_ALLOW_NON_CONTINUATION    0x0004
 197  #define UTF8_ALLOW_FE_FF        0x0008 /* Allow above 0x7fffFFFF */
 198  #define UTF8_ALLOW_SHORT        0x0010
 199  #define UTF8_ALLOW_SURROGATE        0x0020
 200  #define UTF8_ALLOW_FFFF            0x0040 /* Allow UNICODE_ILLEGAL */
 201  #define UTF8_ALLOW_LONG            0x0080
 202  #define UTF8_ALLOW_ANYUV        (UTF8_ALLOW_EMPTY|UTF8_ALLOW_FE_FF|\
 203                       UTF8_ALLOW_SURROGATE|UTF8_ALLOW_FFFF)
 204  #define UTF8_ALLOW_ANY            0x00FF
 205  #define UTF8_CHECK_ONLY            0x0200
 206  #define UTF8_ALLOW_DEFAULT        (ckWARN(WARN_UTF8) ? 0 : \
 207                       UTF8_ALLOW_ANYUV)
 208  
 209  #define UNICODE_SURROGATE_FIRST        0xD800
 210  #define UNICODE_SURROGATE_LAST        0xDFFF
 211  #define UNICODE_REPLACEMENT        0xFFFD
 212  #define UNICODE_BYTE_ORDER_MARK        0xFEFF
 213  #define UNICODE_ILLEGAL            0xFFFF
 214  
 215  /* Though our UTF-8 encoding can go beyond this,
 216   * let's be conservative and do as Unicode 3.2 says. */
 217  #define PERL_UNICODE_MAX    0x10FFFF
 218  
 219  #define UNICODE_ALLOW_SURROGATE 0x0001    /* Allow UTF-16 surrogates (EVIL) */
 220  #define UNICODE_ALLOW_FDD0    0x0002    /* Allow the U+FDD0...U+FDEF */
 221  #define UNICODE_ALLOW_FFFF    0x0004    /* Allow U+FFF[EF], U+1FFF[EF], ... */
 222  #define UNICODE_ALLOW_SUPER    0x0008    /* Allow past 0x10FFFF */
 223  #define UNICODE_ALLOW_ANY    0x000F
 224  
 225  #define UNICODE_IS_SURROGATE(c)        ((c) >= UNICODE_SURROGATE_FIRST && \
 226                       (c) <= UNICODE_SURROGATE_LAST)
 227  #define UNICODE_IS_REPLACEMENT(c)    ((c) == UNICODE_REPLACEMENT)
 228  #define UNICODE_IS_BYTE_ORDER_MARK(c)    ((c) == UNICODE_BYTE_ORDER_MARK)
 229  #define UNICODE_IS_ILLEGAL(c)        ((c) == UNICODE_ILLEGAL)
 230  
 231  #ifdef HAS_QUAD
 232  #    define UTF8_QUAD_MAX    UINT64_C(0x1000000000)
 233  #endif
 234  
 235  #define UTF8_IS_ASCII(c) UTF8_IS_INVARIANT(c)
 236  
 237  #define UNICODE_LATIN_SMALL_LETTER_SHARP_S    0x00DF
 238  #define UNICODE_GREEK_CAPITAL_LETTER_SIGMA    0x03A3
 239  #define UNICODE_GREEK_SMALL_LETTER_FINAL_SIGMA    0x03C2
 240  #define UNICODE_GREEK_SMALL_LETTER_SIGMA    0x03C3
 241  
 242  #define EBCDIC_LATIN_SMALL_LETTER_SHARP_S    0x0059
 243  
 244  #define UNI_DISPLAY_ISPRINT    0x0001
 245  #define UNI_DISPLAY_BACKSLASH    0x0002
 246  #define UNI_DISPLAY_QQ        (UNI_DISPLAY_ISPRINT|UNI_DISPLAY_BACKSLASH)
 247  #define UNI_DISPLAY_REGEX    (UNI_DISPLAY_ISPRINT|UNI_DISPLAY_BACKSLASH)
 248  
 249  #ifdef EBCDIC
 250  #   define ANYOF_FOLD_SHARP_S(node, input, end)    \
 251      (ANYOF_BITMAP_TEST(node, EBCDIC_LATIN_SMALL_LETTER_SHARP_S) && \
 252       (ANYOF_FLAGS(node) & ANYOF_UNICODE) && \
 253       (ANYOF_FLAGS(node) & ANYOF_FOLD) && \
 254       ((end) > (input) + 1) && \
 255       toLOWER((input)[0]) == 's' && \
 256       toLOWER((input)[1]) == 's')
 257  #else
 258  #   define ANYOF_FOLD_SHARP_S(node, input, end)    \
 259      (ANYOF_BITMAP_TEST(node, UNICODE_LATIN_SMALL_LETTER_SHARP_S) && \
 260       (ANYOF_FLAGS(node) & ANYOF_UNICODE) && \
 261       (ANYOF_FLAGS(node) & ANYOF_FOLD) && \
 262       ((end) > (input) + 1) && \
 263       toLOWER((input)[0]) == 's' && \
 264       toLOWER((input)[1]) == 's')
 265  #endif
 266  #define SHARP_S_SKIP 2
 267  
 268  #ifdef EBCDIC
 269  /* IS_UTF8_CHAR() is not ported to EBCDIC */
 270  #else
 271  #define IS_UTF8_CHAR_1(p)    \
 272      ((p)[0] <= 0x7F)
 273  #define IS_UTF8_CHAR_2(p)    \
 274      ((p)[0] >= 0xC2 && (p)[0] <= 0xDF && \
 275       (p)[1] >= 0x80 && (p)[1] <= 0xBF)
 276  #define IS_UTF8_CHAR_3a(p)    \
 277      ((p)[0] == 0xE0 && \
 278       (p)[1] >= 0xA0 && (p)[1] <= 0xBF && \
 279       (p)[2] >= 0x80 && (p)[2] <= 0xBF)
 280  #define IS_UTF8_CHAR_3b(p)    \
 281      ((p)[0] >= 0xE1 && (p)[0] <= 0xEC && \
 282       (p)[1] >= 0x80 && (p)[1] <= 0xBF && \
 283       (p)[2] >= 0x80 && (p)[2] <= 0xBF)
 284  #define IS_UTF8_CHAR_3c(p)    \
 285      ((p)[0] == 0xED && \
 286       (p)[1] >= 0x80 && (p)[1] <= 0xBF && \
 287       (p)[2] >= 0x80 && (p)[2] <= 0xBF)
 288  /* In IS_UTF8_CHAR_3c(p) one could use
 289   * (p)[1] >= 0x80 && (p)[1] <= 0x9F
 290   * if one wanted to exclude surrogates. */
 291  #define IS_UTF8_CHAR_3d(p)    \
 292      ((p)[0] >= 0xEE && (p)[0] <= 0xEF && \
 293       (p)[1] >= 0x80 && (p)[1] <= 0xBF && \
 294       (p)[2] >= 0x80 && (p)[2] <= 0xBF)
 295  #define IS_UTF8_CHAR_4a(p)    \
 296      ((p)[0] == 0xF0 && \
 297       (p)[1] >= 0x90 && (p)[1] <= 0xBF && \
 298       (p)[2] >= 0x80 && (p)[2] <= 0xBF && \
 299       (p)[3] >= 0x80 && (p)[3] <= 0xBF)
 300  #define IS_UTF8_CHAR_4b(p)    \
 301      ((p)[0] >= 0xF1 && (p)[0] <= 0xF3 && \
 302       (p)[1] >= 0x80 && (p)[1] <= 0xBF && \
 303       (p)[2] >= 0x80 && (p)[2] <= 0xBF && \
 304       (p)[3] >= 0x80 && (p)[3] <= 0xBF)
 305  /* In IS_UTF8_CHAR_4c(p) one could use
 306   * (p)[0] == 0xF4
 307   * if one wanted to stop at the Unicode limit U+10FFFF.
 308   * The 0xF7 allows us to go to 0x1fffff (0x200000 would
 309   * require five bytes).  Not doing any further code points
 310   * since that is not needed (and that would not be strict
 311   * UTF-8, anyway).  The "slow path" in Perl_is_utf8_char()
 312   * will take care of the "extended UTF-8". */
 313  #define IS_UTF8_CHAR_4c(p)    \
 314      ((p)[0] == 0xF4 && (p)[0] <= 0xF7 && \
 315       (p)[1] >= 0x80 && (p)[1] <= 0xBF && \
 316       (p)[2] >= 0x80 && (p)[2] <= 0xBF && \
 317       (p)[3] >= 0x80 && (p)[3] <= 0xBF)
 318  
 319  #define IS_UTF8_CHAR_3(p)    \
 320      (IS_UTF8_CHAR_3a(p) || \
 321       IS_UTF8_CHAR_3b(p) || \
 322       IS_UTF8_CHAR_3c(p) || \
 323       IS_UTF8_CHAR_3d(p))
 324  #define IS_UTF8_CHAR_4(p)    \
 325      (IS_UTF8_CHAR_4a(p) || \
 326       IS_UTF8_CHAR_4b(p) || \
 327       IS_UTF8_CHAR_4c(p))
 328  
 329  /* IS_UTF8_CHAR(p) is strictly speaking wrong (not UTF-8) because it
 330   * (1) allows UTF-8 encoded UTF-16 surrogates
 331   * (2) it allows code points past U+10FFFF.
 332   * The Perl_is_utf8_char() full "slow" code will handle the Perl
 333   * "extended UTF-8". */
 334  #define IS_UTF8_CHAR(p, n)    \
 335      ((n) == 1 ? IS_UTF8_CHAR_1(p) : \
 336        (n) == 2 ? IS_UTF8_CHAR_2(p) : \
 337       (n) == 3 ? IS_UTF8_CHAR_3(p) : \
 338       (n) == 4 ? IS_UTF8_CHAR_4(p) : 0)
 339  
 340  #define IS_UTF8_CHAR_FAST(n) ((n) <= 4)
 341  
 342  #endif /* IS_UTF8_CHAR() for UTF-8 */


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