1 // © 2019 and later: Unicode, Inc. and others.
2 // License & terms of use: http://www.unicode.org/copyright.html
3 
4 // ulayout_props.h
5 // created: 2019feb12 Markus W. Scherer
6 
7 #ifndef __ULAYOUT_PROPS_H__
8 #define __ULAYOUT_PROPS_H__
9 
10 #include "unicode/utypes.h"
11 
12 // file definitions ------------------------------------------------------------
13 
14 #define ULAYOUT_DATA_NAME "ulayout"
15 #define ULAYOUT_DATA_TYPE "icu"
16 
17 // data format "Layo"
18 #define ULAYOUT_FMT_0 0x4c
19 #define ULAYOUT_FMT_1 0x61
20 #define ULAYOUT_FMT_2 0x79
21 #define ULAYOUT_FMT_3 0x6f
22 
23 // indexes into indexes[]
24 enum {
25     // Element 0 stores the length of the indexes[] array.
26     ULAYOUT_IX_INDEXES_LENGTH,
27     // Elements 1..7 store the tops of consecutive code point tries.
28     // No trie is stored if the difference between two of these is less than 16.
29     ULAYOUT_IX_INPC_TRIE_TOP,
30     ULAYOUT_IX_INSC_TRIE_TOP,
31     ULAYOUT_IX_VO_TRIE_TOP,
32     ULAYOUT_IX_RESERVED_TOP,
33 
34     ULAYOUT_IX_TRIES_TOP = 7,
35 
36     ULAYOUT_IX_MAX_VALUES = 9,
37 
38     // Length of indexes[]. Multiple of 4 to 16-align the tries.
39     ULAYOUT_IX_COUNT = 12
40 };
41 
42 constexpr int32_t ULAYOUT_MAX_INPC_SHIFT = 24;
43 constexpr int32_t ULAYOUT_MAX_INSC_SHIFT = 16;
44 constexpr int32_t ULAYOUT_MAX_VO_SHIFT = 8;
45 
46 #endif  // __ULAYOUT_PROPS_H__
47