icuSources/test/letest/letsutil.cpp

   1 /*
   2  *******************************************************************************
   3  *
   4  *   Copyright (C) 1999-2008, International Business Machines
   5  *   Corporation and others.  All Rights Reserved.
   6  *
   7  *******************************************************************************
   8  *   file name:  letsutil.cpp
   9  *
  10  *   created on: 04/25/2006
  11  *   created by: Eric R. Mader
  12  */
  13
  14 #include "unicode/utypes.h"
  15 #include "unicode/unistr.h"
  16 #include "unicode/ubidi.h"
  17
  18 #include "layout/LETypes.h"
  19 #include "layout/LEScripts.h"
  20 #include "layout/LayoutEngine.h"
  21 #include "layout/LELanguages.h"
  22
  23 #include "OpenTypeLayoutEngine.h"
  24
  25 #include "letest.h"
  26 #include "letsutil.h"
  27
  28 U_NAMESPACE_USE
  29
  30 char *getCString(const UnicodeString *uString)
  31 {
  32     if (uString == NULL) {
  33         return NULL;
  34     }
  35
  36     le_int32 uLength = uString->length();
  37     le_int32 cLength = uString->extract(0, uLength, NULL, 0, US_INV);
  38     char *cString = NEW_ARRAY(char, cLength + 1);
  39
  40     uString->extract(0, uLength, cString, cLength, US_INV);
  41     cString[cLength] = '\0';
  42
  43     return cString;
  44 }
  45
  46 char *getCString(const LEUnicode16 *uChars)
  47 {
  48     if (uChars == NULL) {
  49         return NULL;
  50     }
  51
  52     const UnicodeString ustring(uChars);
  53
  54     return getCString(&ustring);
  55 }
  56
  57 char *getUTF8String(const UnicodeString *uString)
  58 {
  59     if (uString == NULL) {
  60         return NULL;
  61     }
  62
  63     le_int32 uLength = uString->length();
  64     le_int32 cLength = uString->extract(0, uLength, NULL, 0, "UTF-8");
  65     char *cString = NEW_ARRAY(char, cLength + 1);
  66
  67     uString->extract(0, uLength, cString, cLength, "UTF-8");
  68
  69     cString[cLength] = '\0';
  70
  71     return cString;
  72 }
  73
  74 void freeCString(char *cString)
  75 {
  76     DELETE_ARRAY(cString);
  77 }
  78
  79 le_bool getRTL(const UnicodeString &text)
  80 {
  81     UBiDiLevel level = 0;
  82     UErrorCode status = U_ZERO_ERROR;
  83     le_int32 charCount = text.length();
  84     le_int32 limit = -1;
  85     UBiDi *ubidi = ubidi_openSized(charCount, 0, &status);
  86
  87     ubidi_setPara(ubidi, text.getBuffer(), charCount, UBIDI_DEFAULT_LTR, NULL, &status);
  88
  89     // TODO: Should check that there's only a single logical run...
  90     ubidi_getLogicalRun(ubidi, 0, &limit, &level);
  91
  92     ubidi_close(ubidi);
  93
  94     return level & 1;
  95 }
  96
  97 le_int32 getLanguageCode(const char *lang)
  98 {
  99     if (strlen(lang) != 3) {
 100         return -1;
 101     }
 102
 103     LETag langTag = (LETag) ((lang[0] << 24) + (lang[1] << 16) + (lang[2] << 8) + 0x20);
 104
 105     for (le_int32 i = 0; i < languageCodeCount; i += 1) {
 106         if (langTag == OpenTypeLayoutEngine::languageTags[i]) {
 107             return i;
 108         }
 109     }
 110
 111     return -1;
 112 }
 113