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