icuSources/common/ulayout_props.h

   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__