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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
101