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      1 /*
      2  *******************************************************************************
      3  *
      4  *   Copyright (C) 1999-2014, 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 #ifndef USING_ICULEHB
     24 #include "OpenTypeLayoutEngine.h"
     25 #endif
     26 
     27 #include "letest.h"
     28 #include "letsutil.h"
     29 
     30 U_NAMESPACE_USE
     31 
     32 char *getCString(const UnicodeString *uString)
     33 {
     34     if (uString == NULL) {
     35         return NULL;
     36     }
     37 
     38     le_int32 uLength = uString->length();
     39     le_int32 cLength = uString->extract(0, uLength, NULL, 0, US_INV);
     40     char *cString = NEW_ARRAY(char, cLength + 1);
     41 
     42     uString->extract(0, uLength, cString, cLength, US_INV);
     43     cString[cLength] = '\0';
     44 
     45     return cString;
     46 }
     47 
     48 char *getCString(const LEUnicode16 *uChars)
     49 {
     50     if (uChars == NULL) {
     51         return NULL;
     52     }
     53 
     54     const UnicodeString ustring(uChars);
     55 
     56     return getCString(&ustring);
     57 }
     58 
     59 char *getUTF8String(const UnicodeString *uString)
     60 {
     61     if (uString == NULL) {
     62         return NULL;
     63     }
     64 
     65     le_int32 uLength = uString->length();
     66     le_int32 cLength = uString->extract(0, uLength, NULL, 0, "UTF-8");
     67     char *cString = NEW_ARRAY(char, cLength + 1);
     68 
     69     uString->extract(0, uLength, cString, cLength, "UTF-8");
     70 
     71     cString[cLength] = '\0';
     72 
     73     return cString;
     74 }
     75 
     76 void freeCString(char *cString)
     77 {
     78     DELETE_ARRAY(cString);
     79 }
     80 
     81 le_bool getRTL(const UnicodeString &text)
     82 {
     83     UBiDiLevel level = 0;
     84     UErrorCode status = U_ZERO_ERROR;
     85     le_int32 charCount = text.length();
     86     le_int32 limit = -1;
     87     UBiDi *ubidi = ubidi_openSized(charCount, 0, &status);
     88 
     89     ubidi_setPara(ubidi, text.getBuffer(), charCount, UBIDI_DEFAULT_LTR, NULL, &status);
     90 
     91     // TODO: Should check that there's only a single logical run...
     92     ubidi_getLogicalRun(ubidi, 0, &limit, &level);
     93 
     94     ubidi_close(ubidi);
     95 
     96     return level & 1;
     97 }
     98 
     99 le_int32 getLanguageCode(const char *lang)
    100 {
    101     if (strlen(lang) != 3) {
    102         return -1;
    103     }
    104 
    105     LETag langTag = (LETag) ((lang[0] << 24) + (lang[1] << 16) + (lang[2] << 8) + 0x20);
    106 
    107 #ifndef USING_ICULEHB
    108     for (le_int32 i = 0; i < languageCodeCount; i += 1) {
    109         if (langTag == OpenTypeLayoutEngine::languageTags[i]) {
    110             return i;
    111         }
    112     }
    113 #endif
    114 
    115     return -1;
    116 }
    117 
    118