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      1 // Copyright (C) 2016 and later: Unicode, Inc. and others.
      2 // License & terms of use: http://www.unicode.org/copyright.html
      3 /*
      4  *******************************************************************************
      5  *
      6  *   Copyright (C) 1999-2014, International Business Machines
      7  *   Corporation and others.  All Rights Reserved.
      8  *
      9  *******************************************************************************
     10  *   file name:  letsutil.cpp
     11  *
     12  *   created on: 04/25/2006
     13  *   created by: Eric R. Mader
     14  */
     15 
     16 #include "unicode/utypes.h"
     17 #include "unicode/unistr.h"
     18 #include "unicode/ubidi.h"
     19 
     20 #include "layout/LETypes.h"
     21 #include "layout/LEScripts.h"
     22 #include "layout/LayoutEngine.h"
     23 #include "layout/LELanguages.h"
     24 
     25 #ifndef USING_ICULEHB
     26 #include "OpenTypeLayoutEngine.h"
     27 #endif
     28 
     29 #include "letest.h"
     30 #include "letsutil.h"
     31 
     32 U_NAMESPACE_USE
     33 
     34 char *getCString(const UnicodeString *uString)
     35 {
     36     if (uString == NULL) {
     37         return NULL;
     38     }
     39 
     40     le_int32 uLength = uString->length();
     41     le_int32 cLength = uString->extract(0, uLength, NULL, 0, US_INV);
     42     char *cString = NEW_ARRAY(char, cLength + 1);
     43 
     44     uString->extract(0, uLength, cString, cLength, US_INV);
     45     cString[cLength] = '\0';
     46 
     47     return cString;
     48 }
     49 
     50 char *getCString(const LEUnicode16 *uChars)
     51 {
     52     if (uChars == NULL) {
     53         return NULL;
     54     }
     55 
     56     const UnicodeString ustring(uChars);
     57 
     58     return getCString(&ustring);
     59 }
     60 
     61 char *getUTF8String(const UnicodeString *uString)
     62 {
     63     if (uString == NULL) {
     64         return NULL;
     65     }
     66 
     67     le_int32 uLength = uString->length();
     68     le_int32 cLength = uString->extract(0, uLength, NULL, 0, "UTF-8");
     69     char *cString = NEW_ARRAY(char, cLength + 1);
     70 
     71     uString->extract(0, uLength, cString, cLength, "UTF-8");
     72 
     73     cString[cLength] = '\0';
     74 
     75     return cString;
     76 }
     77 
     78 void freeCString(char *cString)
     79 {
     80     DELETE_ARRAY(cString);
     81 }
     82 
     83 le_bool getRTL(const UnicodeString &text)
     84 {
     85     UBiDiLevel level = 0;
     86     UErrorCode status = U_ZERO_ERROR;
     87     le_int32 charCount = text.length();
     88     le_int32 limit = -1;
     89     UBiDi *ubidi = ubidi_openSized(charCount, 0, &status);
     90 
     91     ubidi_setPara(ubidi, text.getBuffer(), charCount, UBIDI_DEFAULT_LTR, NULL, &status);
     92 
     93     // TODO: Should check that there's only a single logical run...
     94     ubidi_getLogicalRun(ubidi, 0, &limit, &level);
     95 
     96     ubidi_close(ubidi);
     97 
     98     return level & 1;
     99 }
    100 
    101 le_int32 getLanguageCode(const char *lang)
    102 {
    103     if (strlen(lang) != 3) {
    104         return -1;
    105     }
    106 
    107     LETag langTag = (LETag) ((lang[0] << 24) + (lang[1] << 16) + (lang[2] << 8) + 0x20);
    108 
    109 #ifndef USING_ICULEHB
    110     for (le_int32 i = 0; i < languageCodeCount; i += 1) {
    111         if (langTag == OpenTypeLayoutEngine::languageTags[i]) {
    112             return i;
    113         }
    114     }
    115 #else
    116     if (!strcmp(lang, "JAN")) return janLanguageCode;
    117     if (!strcmp(lang, "KOR")) return korLanguageCode;
    118     if (!strcmp(lang, "ZHT")) return zhtLanguageCode;
    119     if (!strcmp(lang, "ZHS")) return zhsLanguageCode;
    120     if (!strcmp(lang, "HIN")) return hinLanguageCode;
    121     if (!strcmp(lang, "MAR")) return marLanguageCode;
    122     if (!strcmp(lang, "ROM")) return romLanguageCode;
    123 #endif
    124 
    125 
    126     return -1;
    127 }
    128 
    129