Source/WTF/wtf/unicode/UnicodeMacrosFromICU.h

   1 /*
   2  *  Copyright (C) 1999-2004, International Business Machines Corporation and others.  All Rights Reserved.
   3  *
   4  */
   5
   6 #ifndef UnicodeMacrosFromICU_h
   7 #define UnicodeMacrosFromICU_h
   8
   9 // some defines from ICU
  10
  11 #define U_IS_BMP(c) ((UChar32)(c)<=0xffff)
  12 #define U16_IS_LEAD(c) (((c)&0xfffffc00)==0xd800)
  13 #define U16_IS_TRAIL(c) (((c)&0xfffffc00)==0xdc00)
  14 #define U16_SURROGATE_OFFSET ((0xd800<<10UL)+0xdc00-0x10000)
  15 #define U16_GET_SUPPLEMENTARY(lead, trail) \
  16     (((UChar32)(lead)<<10UL)+(UChar32)(trail)-U16_SURROGATE_OFFSET)
  17
  18 #define U16_LEAD(supplementary) (UChar)(((supplementary)>>10)+0xd7c0)
  19 #define U16_TRAIL(supplementary) (UChar)(((supplementary)&0x3ff)|0xdc00)
  20 #define U16_LENGTH(c) ((uint32_t)(c) <= 0xffff ? 1 : 2)
  21
  22 #define U_IS_SUPPLEMENTARY(c) ((UChar32)((c)-0x10000)<=0xfffff)
  23 #define U_IS_SURROGATE(c) (((c)&0xfffff800)==0xd800)
  24 #define U16_IS_SINGLE(c) !U_IS_SURROGATE(c)
  25 #define U16_IS_SURROGATE(c) U_IS_SURROGATE(c)
  26 #define U16_IS_SURROGATE_LEAD(c) (((c)&0x400)==0)
  27
  28 #define U16_GET(s, start, i, length, c) { \
  29     (c)=(s)[i]; \
  30     if(U16_IS_SURROGATE(c)) { \
  31         uint16_t __c2; \
  32         if(U16_IS_SURROGATE_LEAD(c)) { \
  33             if((i)+1<(length) && U16_IS_TRAIL(__c2=(s)[(i)+1])) { \
  34                 (c)=U16_GET_SUPPLEMENTARY((c), __c2); \
  35             } \
  36         } else { \
  37             if((i)-1>=(start) && U16_IS_LEAD(__c2=(s)[(i)-1])) { \
  38                 (c)=U16_GET_SUPPLEMENTARY(__c2, (c)); \
  39             } \
  40         } \
  41     } \
  42 }
  43
  44 #define U16_PREV(s, start, i, c) { \
  45     (c)=(s)[--(i)]; \
  46     if(U16_IS_TRAIL(c)) { \
  47         uint16_t __c2; \
  48         if((i)>(start) && U16_IS_LEAD(__c2=(s)[(i)-1])) { \
  49             --(i); \
  50             (c)=U16_GET_SUPPLEMENTARY(__c2, (c)); \
  51         } \
  52     } \
  53 }
  54
  55 #define U16_BACK_1(s, start, i) { \
  56     if(U16_IS_TRAIL((s)[--(i)]) && (i)>(start) && U16_IS_LEAD((s)[(i)-1])) { \
  57         --(i); \
  58     } \
  59 }
  60
  61 #define U16_NEXT(s, i, length, c) { \
  62     (c)=(s)[(i)++]; \
  63     if(U16_IS_LEAD(c)) { \
  64         uint16_t __c2; \
  65         if((i)<(length) && U16_IS_TRAIL(__c2=(s)[(i)])) { \
  66             ++(i); \
  67             (c)=U16_GET_SUPPLEMENTARY((c), __c2); \
  68         } \
  69     } \
  70 }
  71
  72 #define U16_FWD_1(s, i, length) { \
  73     if(U16_IS_LEAD((s)[(i)++]) && (i)<(length) && U16_IS_TRAIL((s)[i])) { \
  74         ++(i); \
  75     } \
  76 }
  77
  78 #define U_MASK(x) ((uint32_t)1<<(x))
  79
  80 #define U8_MAX_LENGTH 4
  81
  82 #define U8_APPEND_UNSAFE(s, i, c) { \
  83     if((uint32_t)(c)<=0x7f) { \
  84         (s)[(i)++]=(uint8_t)(c); \
  85     } else { \
  86         if((uint32_t)(c)<=0x7ff) { \
  87             (s)[(i)++]=(uint8_t)(((c)>>6)|0xc0); \
  88         } else { \
  89             if((uint32_t)(c)<=0xffff) { \
  90                 (s)[(i)++]=(uint8_t)(((c)>>12)|0xe0); \
  91             } else { \
  92                 (s)[(i)++]=(uint8_t)(((c)>>18)|0xf0); \
  93                 (s)[(i)++]=(uint8_t)((((c)>>12)&0x3f)|0x80); \
  94             } \
  95             (s)[(i)++]=(uint8_t)((((c)>>6)&0x3f)|0x80); \
  96         } \
  97         (s)[(i)++]=(uint8_t)(((c)&0x3f)|0x80); \
  98     } \
  99 }
 100 #endif