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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
10START_EXTERN_C
11
12#ifdef DOINIT
13EXTCONST unsigned char PL_utf8skip[] = {
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 */
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). */
23};
24#else
25EXTCONST unsigned char PL_utf8skip[];
26#endif
27
28END_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)