3 * Copyright (c) 1998-2001, Larry Wall
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.
11 /* The equivalent of these macros but implementing UTF-EBCDIC
12 are in the following header file:
15 #include "utfebcdic.h"
20 EXTCONST unsigned char PL_utf8skip[] = {
21 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 */
22 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 */
23 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 */
24 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 */
25 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 */
26 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 */
27 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 */
28 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. */
29 7,13, /* Perl extended (not UTF-8). Up to 72bit allowed (64-bit + reserved). */
32 EXTCONST unsigned char PL_utf8skip[];
36 #define UTF8SKIP(s) PL_utf8skip[*(U8*)s]
38 /* Native character to iso-8859-1 */
39 #define NATIVE_TO_ASCII(ch) (ch)
40 #define ASCII_TO_NATIVE(ch) (ch)
41 /* Transform after encoding */
42 #define NATIVE_TO_UTF(ch) (ch)
43 #define UTF_TO_NATIVE(ch) (ch)
44 /* Transforms in wide UV chars */
45 #define UNI_TO_NATIVE(ch) (ch)
46 #define NATIVE_TO_UNI(ch) (ch)
47 /* Transforms in invariant space */
48 #define NATIVE_TO_NEED(enc,ch) (ch)
49 #define ASCII_TO_NEED(enc,ch) (ch)
51 /* As there are no translations avoid the function wrapper */
52 #define Perl_utf8n_to_uvchr Perl_utf8n_to_uvuni
53 #define Perl_uvchr_to_utf8 Perl_uvuni_to_utf8
57 The following table is from Unicode 3.1.
59 Code Points 1st Byte 2nd Byte 3rd Byte 4th Byte
62 U+0080..U+07FF C2..DF 80..BF
63 U+0800..U+0FFF E0 A0..BF 80..BF
64 U+1000..U+FFFF E1..EF 80..BF 80..BF
65 U+10000..U+3FFFF F0 90..BF 80..BF 80..BF
66 U+40000..U+FFFFF F1..F3 80..BF 80..BF 80..BF
67 U+100000..U+10FFFF F4 80..8F 80..BF 80..BF
71 #define UNI_IS_INVARIANT(c) (((UV)c) < 0x80)
72 #define UTF8_IS_INVARIANT(c) UNI_IS_INVARIANT(NATIVE_TO_UTF(c))
73 #define NATIVE_IS_INVARIANT(c) UNI_IS_INVARIANT(NATIVE_TO_ASCII(c))
74 #define UTF8_IS_START(c) (((U8)c) >= 0xc0 && (((U8)c) <= 0xfd))
75 #define UTF8_IS_CONTINUATION(c) (((U8)c) >= 0x80 && (((U8)c) <= 0xbf))
76 #define UTF8_IS_CONTINUED(c) (((U8)c) & 0x80)
77 #define UTF8_IS_DOWNGRADEABLE_START(c) (((U8)c & 0xfc) == 0xc0)
79 #define UTF_START_MARK(len) ((len > 7) ? 0xFF : (0xFE << (7-len)))
80 #define UTF_START_MASK(len) ((len >= 7) ? 0x00 : (0x1F >> (len-2)))
82 #define UTF_CONTINUATION_MARK 0x80
83 #define UTF_ACCUMULATION_SHIFT 6
84 #define UTF_CONTINUATION_MASK ((U8)0x3f)
85 #define UTF8_ACCUMULATE(old, new) (((old) << UTF_ACCUMULATION_SHIFT) | (((U8)new) & UTF_CONTINUATION_MASK))
87 #define UTF8_EIGHT_BIT_HI(c) ((((U8)(c))>>UTF_ACCUMULATION_SHIFT)|UTF_START_MARK(2))
88 #define UTF8_EIGHT_BIT_LO(c) (((((U8)(c)))&UTF_CONTINUATION_MASK)|UTF_CONTINUATION_MARK)
91 #define UNISKIP(uv) ( (uv) < 0x80 ? 1 : \
93 (uv) < 0x10000 ? 3 : \
94 (uv) < 0x200000 ? 4 : \
95 (uv) < 0x4000000 ? 5 : \
96 (uv) < 0x80000000 ? 6 : \
97 (uv) < UTF8_QUAD_MAX ? 7 : 13 )
99 /* No, I'm not even going to *TRY* putting #ifdef inside a #define */
100 #define UNISKIP(uv) ( (uv) < 0x80 ? 1 : \
102 (uv) < 0x10000 ? 3 : \
103 (uv) < 0x200000 ? 4 : \
104 (uv) < 0x4000000 ? 5 : \
105 (uv) < 0x80000000 ? 6 : 7 )
109 * Note: we try to be careful never to call the isXXX_utf8() functions
110 * unless we're pretty sure we've seen the beginning of a UTF-8 character
111 * (that is, the two high bits are set). Otherwise we risk loading in the
112 * heavy-duty SWASHINIT and SWASHGET routines unnecessarily.
114 #define isIDFIRST_lazy_if(p,c) ((IN_BYTES || (!c || (*((U8*)p) < 0xc0))) \
116 : isIDFIRST_utf8((U8*)p))
117 #define isALNUM_lazy_if(p,c) ((IN_BYTES || (!c || (*((U8*)p) < 0xc0))) \
119 : isALNUM_utf8((U8*)p))
122 #endif /* EBCDIC vs ASCII */
124 /* Rest of these are attributes of Unicode and perl's internals rather than the encoding */
126 #define isIDFIRST_lazy(p) isIDFIRST_lazy_if(p,1)
127 #define isALNUM_lazy(p) isALNUM_lazy_if(p,1)
129 #define UTF8_MAXLEN 13 /* how wide can a single UTF8 encoded character become */
131 /* #define IN_UTF8 (PL_curcop->op_private & HINT_UTF8) */
132 #define IN_BYTES (PL_curcop->op_private & HINT_BYTES)
133 #define DO_UTF8(sv) (SvUTF8(sv) && !IN_BYTES)
135 #define UTF8_ALLOW_EMPTY 0x0001
136 #define UTF8_ALLOW_CONTINUATION 0x0002
137 #define UTF8_ALLOW_NON_CONTINUATION 0x0004
138 #define UTF8_ALLOW_FE_FF 0x0008
139 #define UTF8_ALLOW_SHORT 0x0010
140 #define UTF8_ALLOW_SURROGATE 0x0020
141 #define UTF8_ALLOW_BOM 0x0040
142 #define UTF8_ALLOW_FFFF 0x0080
143 #define UTF8_ALLOW_LONG 0x0100
144 #define UTF8_ALLOW_ANYUV (UTF8_ALLOW_EMPTY|UTF8_ALLOW_FE_FF|\
145 UTF8_ALLOW_SURROGATE|UTF8_ALLOW_BOM|\
146 UTF8_ALLOW_FFFF|UTF8_ALLOW_LONG)
147 #define UTF8_ALLOW_ANY 0x00ff
148 #define UTF8_CHECK_ONLY 0x0100
150 #define UNICODE_SURROGATE_FIRST 0xd800
151 #define UNICODE_SURROGATE_LAST 0xdfff
152 #define UNICODE_REPLACEMENT 0xfffd
153 #define UNICODE_BYTER_ORDER_MARK 0xfffe
154 #define UNICODE_ILLEGAL 0xffff
156 #define UNICODE_IS_SURROGATE(c) ((c) >= UNICODE_SURROGATE_FIRST && \
157 (c) <= UNICODE_SURROGATE_LAST)
158 #define UNICODE_IS_REPLACEMENT(c) ((c) == UNICODE_REPLACEMENT)
159 #define UNICODE_IS_BYTE_ORDER_MARK(c) ((c) == UNICODE_BYTER_ORDER_MARK)
160 #define UNICODE_IS_ILLEGAL(c) ((c) == UNICODE_ILLEGAL)
162 #define UTF8_QUAD_MAX UINT64_C(0x1000000000)
164 #define UTF8_IS_ASCII(c) UTF8_IS_INVARIANT(c)