icuSources/layout/ScriptAndLanguage.cpp

   1 /*
   2  * %W% %E%
   3  *
   4  * (C) Copyright IBM Corp. 1998-2003 - All Rights Reserved
   5  *
   6  */
   7
   8 #include "LETypes.h"
   9 #include "OpenTypeTables.h"
  10 #include "OpenTypeUtilities.h"
  11 #include "ScriptAndLanguage.h"
  12 #include "LESwaps.h"
  13
  14 U_NAMESPACE_BEGIN
  15
  16 const LangSysTable *ScriptTable::findLanguage(LETag languageTag, le_bool exactMatch) const
  17 {
  18     le_uint16 count = SWAPW(langSysCount);
  19     Offset langSysTableOffset = exactMatch? 0 : SWAPW(defaultLangSysTableOffset);
  20
  21     if (count > 0) {
  22         Offset foundOffset =
  23             OpenTypeUtilities::getTagOffset(languageTag, langSysRecordArray, count);
  24
  25         if (foundOffset != 0) {
  26             langSysTableOffset = foundOffset;
  27         }
  28     }
  29
  30     if (langSysTableOffset != 0) {
  31         return (const LangSysTable *) ((char *)this + langSysTableOffset);
  32     }
  33
  34     return 0;
  35 }
  36
  37 const ScriptTable *ScriptListTable::findScript(LETag scriptTag) const
  38 {
  39     le_uint16 count = SWAPW(scriptCount);
  40     Offset scriptTableOffset =
  41         OpenTypeUtilities::getTagOffset(scriptTag, scriptRecordArray, count);
  42
  43     if (scriptTableOffset != 0) {
  44         return (const ScriptTable *) ((char *)this + scriptTableOffset);
  45     }
  46
  47     return 0;
  48 }
  49
  50 const LangSysTable *ScriptListTable::findLanguage(LETag scriptTag, LETag languageTag, le_bool exactMatch) const
  51 {
  52     const ScriptTable *scriptTable = findScript(scriptTag);
  53
  54     if (scriptTable == 0) {
  55         return 0;
  56     }
  57
  58     return scriptTable->findLanguage(languageTag, exactMatch);
  59 }
  60
  61 U_NAMESPACE_END