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      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 
    114