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.
10 /* Use UTF-8 as the default script encoding?
11 * Turning this on will break scripts having non-UTF8 binary
12 * data (such as Latin-1) in string literals. */
13 #ifdef USE_UTF8_SCRIPTS
14 # define USE_UTF8_IN_NAMES (!IN_BYTES)
16 # define USE_UTF8_IN_NAMES (PL_hints & HINT_UTF8)
20 /* The equivalent of these macros but implementing UTF-EBCDIC
21 are in the following header file:
24 #include "utfebcdic.h"
29 EXTCONST unsigned char PL_utf8skip[] = {
30 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 */
31 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 */
32 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 */
33 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 */
34 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 */
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, /* bogus */
36 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 */
37 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. */
38 7,13, /* Perl extended (not UTF-8). Up to 72bit allowed (64-bit + reserved). */
41 EXTCONST unsigned char PL_utf8skip[];
45 #define UTF8SKIP(s) PL_utf8skip[*(U8*)s]
47 /* Native character to iso-8859-1 */
48 #define NATIVE_TO_ASCII(ch) (ch)
49 #define ASCII_TO_NATIVE(ch) (ch)
50 /* Transform after encoding */
51 #define NATIVE_TO_UTF(ch) (ch)
52 #define UTF_TO_NATIVE(ch) (ch)
53 /* Transforms in wide UV chars */
54 #define UNI_TO_NATIVE(ch) (ch)
55 #define NATIVE_TO_UNI(ch) (ch)
56 /* Transforms in invariant space */
57 #define NATIVE_TO_NEED(enc,ch) (ch)
58 #define ASCII_TO_NEED(enc,ch) (ch)
60 /* As there are no translations avoid the function wrapper */
61 #define Perl_utf8n_to_uvchr Perl_utf8n_to_uvuni
62 #define Perl_uvchr_to_utf8 Perl_uvuni_to_utf8
66 The following table is from Unicode 3.1.
68 Code Points 1st Byte 2nd Byte 3rd Byte 4th Byte
71 U+0080..U+07FF C2..DF 80..BF
72 U+0800..U+0FFF E0 A0..BF 80..BF
73 U+1000..U+FFFF E1..EF 80..BF 80..BF
74 U+10000..U+3FFFF F0 90..BF 80..BF 80..BF
75 U+40000..U+FFFFF F1..F3 80..BF 80..BF 80..BF
76 U+100000..U+10FFFF F4 80..8F 80..BF 80..BF
80 #define UNI_IS_INVARIANT(c) (((UV)c) < 0x80)
81 #define UTF8_IS_INVARIANT(c) UNI_IS_INVARIANT(NATIVE_TO_UTF(c))
82 #define NATIVE_IS_INVARIANT(c) UNI_IS_INVARIANT(NATIVE_TO_ASCII(c))
83 #define UTF8_IS_START(c) (((U8)c) >= 0xc0 && (((U8)c) <= 0xfd))
84 #define UTF8_IS_CONTINUATION(c) (((U8)c) >= 0x80 && (((U8)c) <= 0xbf))
85 #define UTF8_IS_CONTINUED(c) (((U8)c) & 0x80)
86 #define UTF8_IS_DOWNGRADEABLE_START(c) (((U8)c & 0xfc) == 0xc0)
88 #define UTF_START_MARK(len) ((len > 7) ? 0xFF : (0xFE << (7-len)))
89 #define UTF_START_MASK(len) ((len >= 7) ? 0x00 : (0x1F >> (len-2)))
91 #define UTF_CONTINUATION_MARK 0x80
92 #define UTF_ACCUMULATION_SHIFT 6
93 #define UTF_CONTINUATION_MASK ((U8)0x3f)
94 #define UTF8_ACCUMULATE(old, new) (((old) << UTF_ACCUMULATION_SHIFT) | (((U8)new) & UTF_CONTINUATION_MASK))
96 #define UTF8_EIGHT_BIT_HI(c) ((((U8)(c))>>UTF_ACCUMULATION_SHIFT)|UTF_START_MARK(2))
97 #define UTF8_EIGHT_BIT_LO(c) (((((U8)(c)))&UTF_CONTINUATION_MASK)|UTF_CONTINUATION_MARK)
100 #define UNISKIP(uv) ( (uv) < 0x80 ? 1 : \
102 (uv) < 0x10000 ? 3 : \
103 (uv) < 0x200000 ? 4 : \
104 (uv) < 0x4000000 ? 5 : \
105 (uv) < 0x80000000 ? 6 : \
106 (uv) < UTF8_QUAD_MAX ? 7 : 13 )
108 /* No, I'm not even going to *TRY* putting #ifdef inside a #define */
109 #define UNISKIP(uv) ( (uv) < 0x80 ? 1 : \
111 (uv) < 0x10000 ? 3 : \
112 (uv) < 0x200000 ? 4 : \
113 (uv) < 0x4000000 ? 5 : \
114 (uv) < 0x80000000 ? 6 : 7 )
118 * Note: we try to be careful never to call the isXXX_utf8() functions
119 * unless we're pretty sure we've seen the beginning of a UTF-8 character
120 * (that is, the two high bits are set). Otherwise we risk loading in the
121 * heavy-duty SWASHINIT and SWASHGET routines unnecessarily.
123 #define isIDFIRST_lazy_if(p,c) ((IN_BYTES || (!c || (*((U8*)p) < 0xc0))) \
125 : isIDFIRST_utf8((U8*)p))
126 #define isALNUM_lazy_if(p,c) ((IN_BYTES || (!c || (*((U8*)p) < 0xc0))) \
128 : isALNUM_utf8((U8*)p))
131 #endif /* EBCDIC vs ASCII */
133 /* Rest of these are attributes of Unicode and perl's internals rather than the encoding */
135 #define isIDFIRST_lazy(p) isIDFIRST_lazy_if(p,1)
136 #define isALNUM_lazy(p) isALNUM_lazy_if(p,1)
138 #define UTF8_MAXLEN 13 /* how wide can a single UTF8 encoded character become */
140 #define IN_BYTES (PL_curcop->op_private & HINT_BYTES)
141 #define DO_UTF8(sv) (SvUTF8(sv) && !IN_BYTES)
143 #define UTF8_ALLOW_EMPTY 0x0001
144 #define UTF8_ALLOW_CONTINUATION 0x0002
145 #define UTF8_ALLOW_NON_CONTINUATION 0x0004
146 #define UTF8_ALLOW_FE_FF 0x0008
147 #define UTF8_ALLOW_SHORT 0x0010
148 #define UTF8_ALLOW_SURROGATE 0x0020
149 #define UTF8_ALLOW_BOM 0x0040
150 #define UTF8_ALLOW_FFFF 0x0080
151 #define UTF8_ALLOW_LONG 0x0100
152 #define UTF8_ALLOW_ANYUV (UTF8_ALLOW_EMPTY|UTF8_ALLOW_FE_FF|\
153 UTF8_ALLOW_SURROGATE|UTF8_ALLOW_BOM|\
154 UTF8_ALLOW_FFFF|UTF8_ALLOW_LONG)
155 #define UTF8_ALLOW_ANY 0x00ff
156 #define UTF8_CHECK_ONLY 0x0200
158 #define UNICODE_SURROGATE_FIRST 0xd800
159 #define UNICODE_SURROGATE_LAST 0xdfff
160 #define UNICODE_REPLACEMENT 0xfffd
161 #define UNICODE_BYTER_ORDER_MARK 0xfffe
162 #define UNICODE_ILLEGAL 0xffff
164 #define UNICODE_IS_SURROGATE(c) ((c) >= UNICODE_SURROGATE_FIRST && \
165 (c) <= UNICODE_SURROGATE_LAST)
166 #define UNICODE_IS_REPLACEMENT(c) ((c) == UNICODE_REPLACEMENT)
167 #define UNICODE_IS_BYTE_ORDER_MARK(c) ((c) == UNICODE_BYTER_ORDER_MARK)
168 #define UNICODE_IS_ILLEGAL(c) ((c) == UNICODE_ILLEGAL)
171 # define UTF8_QUAD_MAX UINT64_C(0x1000000000)
174 #define UTF8_IS_ASCII(c) UTF8_IS_INVARIANT(c)