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1 | /* utf8.h |
2 | * |
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3 | * Copyright (c) 1998-2001, 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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10 | START_EXTERN_C |
11 | |
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12 | #ifdef DOINIT |
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13 | EXTCONST unsigned char PL_utf8skip[] = { |
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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 */ |
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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). */ |
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23 | }; |
24 | #else |
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25 | EXTCONST unsigned char PL_utf8skip[]; |
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26 | #endif |
27 | |
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28 | END_EXTERN_C |
29 | |
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30 | #define UTF8_MAXLEN 13 /* how wide can a single UTF8 encoded character become */ |
31 | |
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32 | /* #define IN_UTF8 (PL_curcop->op_private & HINT_UTF8) */ |
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33 | #define IN_BYTE (PL_curcop->op_private & HINT_BYTE) |
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34 | #ifdef USE_BYTES_DOWNGRADES |
35 | #define DO_UTF8(sv) (SvUTF8(sv) && !(IN_BYTE && sv_utf8_downgrade(sv,0))) |
36 | #else |
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37 | #define DO_UTF8(sv) (SvUTF8(sv) && !IN_BYTE) |
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38 | #endif |
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39 | |
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40 | #define UTF8_ALLOW_EMPTY 0x0001 |
41 | #define UTF8_ALLOW_CONTINUATION 0x0002 |
42 | #define UTF8_ALLOW_NON_CONTINUATION 0x0004 |
43 | #define UTF8_ALLOW_FE_FF 0x0008 |
44 | #define UTF8_ALLOW_SHORT 0x0010 |
45 | #define UTF8_ALLOW_SURROGATE 0x0020 |
46 | #define UTF8_ALLOW_BOM 0x0040 |
47 | #define UTF8_ALLOW_FFFF 0x0080 |
48 | #define UTF8_ALLOW_LONG 0x0100 |
49 | #define UTF8_ALLOW_ANYUV (UTF8_ALLOW_EMPTY|UTF8_ALLOW_FE_FF|\ |
50 | UTF8_ALLOW_SURROGATE|UTF8_ALLOW_BOM|\ |
51 | UTF8_ALLOW_FFFF|UTF8_ALLOW_LONG) |
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52 | #define UTF8_ALLOW_ANY 0x00ff |
53 | #define UTF8_CHECK_ONLY 0x0100 |
54 | |
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55 | #define UNICODE_SURROGATE_FIRST 0xd800 |
56 | #define UNICODE_SURROGATE_LAST 0xdfff |
57 | #define UNICODE_REPLACEMENT 0xfffd |
58 | #define UNICODE_BYTER_ORDER_MARK 0xfffe |
59 | #define UNICODE_ILLEGAL 0xffff |
60 | |
61 | #define UNICODE_IS_SURROGATE(c) ((c) >= UNICODE_SURROGATE_FIRST && \ |
62 | (c) <= UNICODE_SURROGATE_LAST) |
63 | #define UNICODE_IS_REPLACEMENT(c) ((c) == UNICODE_REPLACMENT) |
64 | #define UNICODE_IS_BYTE_ORDER_MARK(c) ((c) == UNICODE_BYTER_ORDER_MARK) |
65 | #define UNICODE_IS_ILLEGAL(c) ((c) == UNICODE_ILLEGAL) |
66 | |
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67 | #define UTF8SKIP(s) PL_utf8skip[*(U8*)s] |
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68 | |
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69 | #define UTF8_QUAD_MAX UINT64_C(0x1000000000) |
70 | |
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71 | /* |
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72 | |
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73 | The following table is from Unicode 3.1. |
74 | |
75 | Code Points 1st Byte 2nd Byte 3rd Byte 4th Byte |
76 | |
77 | U+0000..U+007F 00..7F |
78 | U+0080..U+07FF C2..DF 80..BF |
79 | U+0800..U+0FFF E0 A0..BF 80..BF |
80 | U+1000..U+FFFF E1..EF 80..BF 80..BF |
81 | U+10000..U+3FFFF F0 90..BF 80..BF 80..BF |
82 | U+40000..U+FFFFF F1..F3 80..BF 80..BF 80..BF |
83 | U+100000..U+10FFFF F4 80..8F 80..BF 80..BF |
84 | |
85 | */ |
86 | |
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87 | #define UTF8_IS_ASCII(c) (((U8)c) < 0x80) |
88 | #define UTF8_IS_START(c) (((U8)c) >= 0xc0 && (((U8)c) <= 0xfd)) |
89 | #define UTF8_IS_CONTINUATION(c) (((U8)c) >= 0x80 && (((U8)c) <= 0xbf)) |
90 | #define UTF8_IS_CONTINUED(c) (((U8)c) & 0x80) |
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91 | #define UTF8_IS_DOWNGRADEABLE_START(c) (((U8)c & 0xfc) != 0xc0) |
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92 | |
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93 | #define UTF8_CONTINUATION_MASK ((U8)0x3f) |
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94 | #define UTF8_ACCUMULATION_SHIFT 6 |
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95 | #define UTF8_ACCUMULATE(old, new) ((old) << UTF8_ACCUMULATION_SHIFT | (((U8)new) & UTF8_CONTINUATION_MASK)) |
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96 | |
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97 | #define UTF8_EIGHT_BIT_HI(c) ( (((U8)(c))>>6) |0xc0) |
98 | #define UTF8_EIGHT_BIT_LO(c) (((((U8)(c)) )&0x3f)|0x80) |
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99 | |
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100 | #ifdef HAS_QUAD |
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101 | #define UNISKIP(uv) ( (uv) < 0x80 ? 1 : \ |
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102 | (uv) < 0x800 ? 2 : \ |
103 | (uv) < 0x10000 ? 3 : \ |
104 | (uv) < 0x200000 ? 4 : \ |
105 | (uv) < 0x4000000 ? 5 : \ |
106 | (uv) < 0x80000000 ? 6 : \ |
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107 | (uv) < UTF8_QUAD_MAX ? 7 : 13 ) |
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108 | #else |
109 | /* No, I'm not even going to *TRY* putting #ifdef inside a #define */ |
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110 | #define UNISKIP(uv) ( (uv) < 0x80 ? 1 : \ |
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111 | (uv) < 0x800 ? 2 : \ |
112 | (uv) < 0x10000 ? 3 : \ |
113 | (uv) < 0x200000 ? 4 : \ |
114 | (uv) < 0x4000000 ? 5 : \ |
115 | (uv) < 0x80000000 ? 6 : 7 ) |
116 | #endif |
117 | |
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118 | |
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119 | /* |
120 | * Note: we try to be careful never to call the isXXX_utf8() functions |
121 | * unless we're pretty sure we've seen the beginning of a UTF-8 character |
122 | * (that is, the two high bits are set). Otherwise we risk loading in the |
123 | * heavy-duty SWASHINIT and SWASHGET routines unnecessarily. |
124 | */ |
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125 | #ifdef EBCDIC |
126 | #define isIDFIRST_lazy_if(p,c) isIDFIRST(*(p)) |
127 | #define isALNUM_lazy_if(p,c) isALNUM(*(p)) |
128 | #else |
129 | #define isIDFIRST_lazy_if(p,c) ((IN_BYTE || (!c || (*((U8*)p) < 0xc0))) \ |
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130 | ? isIDFIRST(*(p)) \ |
131 | : isIDFIRST_utf8((U8*)p)) |
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132 | #define isALNUM_lazy_if(p,c) ((IN_BYTE || (!c || (*((U8*)p) < 0xc0))) \ |
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133 | ? isALNUM(*(p)) \ |
134 | : isALNUM_utf8((U8*)p)) |
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135 | #endif |
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136 | #define isIDFIRST_lazy(p) isIDFIRST_lazy_if(p,1) |
137 | #define isALNUM_lazy(p) isALNUM_lazy_if(p,1) |
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138 | |
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139 | /* EBCDIC-happy ways of converting native code to UTF8 */ |
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140 | |
141 | #ifdef EBCDIC |
142 | #define NATIVE_TO_ASCII(ch) PL_e2a[(ch)] |
143 | #define ASCII_TO_NATIVE(ch) PL_a2e[(ch)] |
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144 | #define UNI_TO_NATIVE(ch) (((ch) > 0x100) ? (ch) : (UV) PL_a2e[(ch)]) |
145 | #define NATIVE_TO_UNI(ch) (((ch) > 0x100) ? (ch) : (UV) PL_e2a[(ch)]) |
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146 | #else |
147 | #define NATIVE_TO_ASCII(ch) (ch) |
148 | #define ASCII_TO_NATIVE(ch) (ch) |
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149 | #define UNI_TO_NATIVE(ch) (ch) |
150 | #define NATIVE_TO_UNI(ch) (ch) |
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151 | #endif |
152 | |