Modified README.bs2000

[p5sagit/p5-mst-13.2.git] / utf8.h

diff --git a/utf8.h b/utf8.h
index 8f69fef..8b0c8c3 100644 (file)
--- a/utf8.h
+++ b/utf8.h
@@ -1,6 +1,6 @@
 /*    utf8.h
  *
- *    Copyright (c) 1998-2000, Larry Wall
+ *    Copyright (c) 1998-2001, Larry Wall
  *
  *    You may distribute under the terms of either the GNU General Public
  *    License or the Artistic License, as specified in the README file.
@@ -27,23 +27,107 @@ EXTCONST unsigned char PL_utf8skip[];
 
 END_EXTERN_C
 
-/*#define IN_UTF8 (PL_curcop->op_private & HINT_UTF8)*/
+#define UTF8_MAXLEN 13 /* how wide can a single UTF8 encoded character become */
+
+/* #define IN_UTF8 (PL_curcop->op_private & HINT_UTF8) */
 #define IN_BYTE (PL_curcop->op_private & HINT_BYTE)
 #define DO_UTF8(sv) (SvUTF8(sv) && !IN_BYTE)
 
+#define UTF8_ALLOW_EMPTY               0x0001
+#define UTF8_ALLOW_CONTINUATION                0x0002
+#define UTF8_ALLOW_NON_CONTINUATION    0x0004
+#define UTF8_ALLOW_FE_FF               0x0008
+#define UTF8_ALLOW_SHORT               0x0010
+#define UTF8_ALLOW_SURROGATE           0x0020
+#define UTF8_ALLOW_BOM                 0x0040
+#define UTF8_ALLOW_FFFF                        0x0080
+#define UTF8_ALLOW_LONG                        0x0100
+#define UTF8_ALLOW_ANYUV               (UTF8_ALLOW_EMPTY|UTF8_ALLOW_FE_FF|\
+                                        UTF8_ALLOW_SURROGATE|UTF8_ALLOW_BOM|\
+                                        UTF8_ALLOW_FFFF|UTF8_ALLOW_LONG)
+#define UTF8_ALLOW_ANY                 0x00ff
+#define UTF8_CHECK_ONLY                        0x0100
+
+#define UNICODE_SURROGATE_FIRST                0xd800
+#define UNICODE_SURROGATE_LAST         0xdfff
+#define UNICODE_REPLACEMENT            0xfffd
+#define UNICODE_BYTER_ORDER_MARK       0xfffe
+#define UNICODE_ILLEGAL                        0xffff
+
+#define UNICODE_IS_SURROGATE(c)                ((c) >= UNICODE_SURROGATE_FIRST && \
+                                        (c) <= UNICODE_SURROGATE_LAST)
+#define UNICODE_IS_REPLACEMENT(c)      ((c) == UNICODE_REPLACMENT)
+#define UNICODE_IS_BYTE_ORDER_MARK(c)  ((c) == UNICODE_BYTER_ORDER_MARK)
+#define UNICODE_IS_ILLEGAL(c)          ((c) == UNICODE_ILLEGAL)
+
 #define UTF8SKIP(s) PL_utf8skip[*(U8*)s]
 
+#define UTF8_QUAD_MAX  UINT64_C(0x1000000000)
+
+/*
+ 
+ The following table is from Unicode 3.1.
+
+ Code Points           1st Byte  2nd Byte  3rd Byte  4th Byte
+
+   U+0000..U+007F      00..7F   
+   U+0080..U+07FF      C2..DF    80..BF   
+   U+0800..U+0FFF      E0        A0..BF    80..BF  
+   U+1000..U+FFFF      E1..EF    80..BF    80..BF  
+  U+10000..U+3FFFF     F0        90..BF    80..BF    80..BF
+  U+40000..U+FFFFF     F1..F3    80..BF    80..BF    80..BF
+ U+100000..U+10FFFF    F4        80..8F    80..BF    80..BF
+
+ */
+
+#define UTF8_IS_ASCII(c)               (((U8)c) <  0x80)
+#define UTF8_IS_START(c)               (((U8)c) >= 0xc0 && (((U8)c) <= 0xfd))
+#define UTF8_IS_CONTINUATION(c)                (((U8)c) >= 0x80 && (((U8)c) <= 0xbf))
+#define UTF8_IS_CONTINUED(c)           (((U8)c) &  0x80)
+#define UTF8_IS_DOWNGRADEABLE_START(c) (((U8)c & 0xfc) != 0xc0)
+
+#define UTF8_CONTINUATION_MASK         ((U8)0x3f)
+#define UTF8_ACCUMULATION_SHIFT                6
+#define UTF8_ACCUMULATE(old, new)      ((old) << UTF8_ACCUMULATION_SHIFT | (((U8)new) & UTF8_CONTINUATION_MASK))
+
+#define UTF8_EIGHT_BIT_HI(c)   ( (((U8)(c))>>6)      |0xc0)
+#define UTF8_EIGHT_BIT_LO(c)   (((((U8)(c))   )&0x3f)|0x80)
+
+#ifdef HAS_QUAD
+#define UNISKIP(uv) ( (uv) < 0x80           ? 1 : \
+                     (uv) < 0x800          ? 2 : \
+                     (uv) < 0x10000        ? 3 : \
+                     (uv) < 0x200000       ? 4 : \
+                     (uv) < 0x4000000      ? 5 : \
+                     (uv) < 0x80000000     ? 6 : \
+                      (uv) < UTF8_QUAD_MAX ? 7 : 13 ) 
+#else
+/* No, I'm not even going to *TRY* putting #ifdef inside a #define */
+#define UNISKIP(uv) ( (uv) < 0x80           ? 1 : \
+                     (uv) < 0x800          ? 2 : \
+                     (uv) < 0x10000        ? 3 : \
+                     (uv) < 0x200000       ? 4 : \
+                     (uv) < 0x4000000      ? 5 : \
+                     (uv) < 0x80000000     ? 6 : 7 )
+#endif
+
+
 /*
  * Note: we try to be careful never to call the isXXX_utf8() functions
  * unless we're pretty sure we've seen the beginning of a UTF-8 character
  * (that is, the two high bits are set).  Otherwise we risk loading in the
  * heavy-duty SWASHINIT and SWASHGET routines unnecessarily.
  */
-#define isIDFIRST_lazy_if(p,c) ((!c || (*((U8*)p) < 0xc0)) \
+#ifdef EBCDIC
+#define isIDFIRST_lazy_if(p,c) isIDFIRST(*(p))
+#define isALNUM_lazy_if(p,c)   isALNUM(*(p))
+#else
+#define isIDFIRST_lazy_if(p,c) ((IN_BYTE || (!c || (*((U8*)p) < 0xc0))) \
                                ? isIDFIRST(*(p)) \
                                : isIDFIRST_utf8((U8*)p))
-#define isALNUM_lazy_if(p,c)   ((!c || (*((U8*)p) < 0xc0)) \
+#define isALNUM_lazy_if(p,c)   ((IN_BYTE || (!c || (*((U8*)p) < 0xc0))) \
                                ? isALNUM(*(p)) \
                                : isALNUM_utf8((U8*)p))
+#endif
 #define isIDFIRST_lazy(p)      isIDFIRST_lazy_if(p,1)
 #define isALNUM_lazy(p)                isALNUM_lazy_if(p,1)