src/third_party/skia/third_party/harfbuzz/contrib/harfbuzz-unicode-tables.c

   1 #include <stdlib.h>
   2 #include <stdint.h>
   3
   4 #include <harfbuzz-external.h>
   5
   6 #include "tables/category-properties.h"
   7 #include "tables/combining-properties.h"
   8
   9 HB_LineBreakClass
  10 HB_GetLineBreakClass(HB_UChar32 ch) {
  11   abort();
  12   return 0;
  13 }
  14
  15 static int
  16 combining_property_cmp(const void *vkey, const void *vcandidate) {
  17   const uint32_t key = (uint32_t) (intptr_t) vkey;
  18   const struct combining_property *candidate = vcandidate;
  19
  20   if (key < candidate->range_start) {
  21     return -1;
  22   } else if (key > candidate->range_end) {
  23     return 1;
  24   } else {
  25     return 0;
  26   }
  27 }
  28
  29 static int
  30 code_point_to_combining_class(HB_UChar32 cp) {
  31   const void *vprop = bsearch((void *) (intptr_t) cp, combining_properties,
  32                               combining_properties_count,
  33                               sizeof(struct combining_property),
  34                               combining_property_cmp);
  35   if (!vprop)
  36     return 0;
  37
  38   return ((const struct combining_property *) vprop)->klass;
  39 }
  40
  41 int
  42 HB_GetUnicodeCharCombiningClass(HB_UChar32 ch) {
  43   return code_point_to_combining_class(ch);
  44   return 0;
  45 }
  46
  47 static int
  48 category_property_cmp(const void *vkey, const void *vcandidate) {
  49   const uint32_t key = (uint32_t) (intptr_t) vkey;
  50   const struct category_property *candidate = vcandidate;
  51
  52   if (key < candidate->range_start) {
  53     return -1;
  54   } else if (key > candidate->range_end) {
  55     return 1;
  56   } else {
  57     return 0;
  58   }
  59 }
  60
  61 static HB_CharCategory
  62 code_point_to_category(HB_UChar32 cp) {
  63   const void *vprop = bsearch((void *) (intptr_t) cp, category_properties,
  64                               category_properties_count,
  65                               sizeof(struct category_property),
  66                               category_property_cmp);
  67   if (!vprop)
  68     return HB_NoCategory;
  69
  70   return ((const struct category_property *) vprop)->category;
  71 }
  72
  73 void
  74 HB_GetUnicodeCharProperties(HB_UChar32 ch,
  75                             HB_CharCategory *category,
  76                             int *combiningClass) {
  77   *category = code_point_to_category(ch);
  78   *combiningClass = code_point_to_combining_class(ch);
  79 }
  80
  81 HB_CharCategory
  82 HB_GetUnicodeCharCategory(HB_UChar32 ch) {
  83   return code_point_to_category(ch);
  84 }