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      1 /*
      2 **********************************************************************
      3 *   Copyright (C) 1997-2014, International Business Machines
      4 *   Corporation and others.  All Rights Reserved.
      5 **********************************************************************
      6 *
      7 * File USCRIPT.C
      8 *
      9 * Modification History:
     10 *
     11 *   Date        Name        Description
     12 *   07/06/2001    Ram         Creation.
     13 ******************************************************************************
     14 */
     15 
     16 #include "unicode/uchar.h"
     17 #include "unicode/uscript.h"
     18 #include "unicode/uloc.h"
     19 #include "cmemory.h"
     20 #include "cstring.h"
     21 
     22 static const UScriptCode JAPANESE[3] = { USCRIPT_KATAKANA, USCRIPT_HIRAGANA, USCRIPT_HAN };
     23 static const UScriptCode KOREAN[2] = { USCRIPT_HANGUL, USCRIPT_HAN };
     24 static const UScriptCode HAN_BOPO[2] = { USCRIPT_HAN, USCRIPT_BOPOMOFO };
     25 
     26 static int32_t
     27 setCodes(const UScriptCode *src, int32_t length,
     28          UScriptCode *dest, int32_t capacity, UErrorCode *err) {
     29     int32_t i;
     30     if(U_FAILURE(*err)) { return 0; }
     31     if(length > capacity) {
     32         *err = U_BUFFER_OVERFLOW_ERROR;
     33         return length;
     34     }
     35     for(i = 0; i < length; ++i) {
     36         dest[i] = src[i];
     37     }
     38     return length;
     39 }
     40 
     41 static int32_t
     42 setOneCode(UScriptCode script, UScriptCode *scripts, int32_t capacity, UErrorCode *err) {
     43     if(U_FAILURE(*err)) { return 0; }
     44     if(1 > capacity) {
     45         *err = U_BUFFER_OVERFLOW_ERROR;
     46         return 1;
     47     }
     48     scripts[0] = script;
     49     return 1;
     50 }
     51 
     52 static int32_t
     53 getCodesFromLocale(const char *locale,
     54                    UScriptCode *scripts, int32_t capacity, UErrorCode *err) {
     55     UErrorCode internalErrorCode = U_ZERO_ERROR;
     56     char lang[8];
     57     char script[8];
     58     int32_t scriptLength;
     59     if(U_FAILURE(*err)) { return 0; }
     60     // Multi-script languages, equivalent to the LocaleScript data
     61     // that we used to load from locale resource bundles.
     62     /*length = */ uloc_getLanguage(locale, lang, UPRV_LENGTHOF(lang), &internalErrorCode);
     63     if(U_FAILURE(internalErrorCode) || internalErrorCode == U_STRING_NOT_TERMINATED_WARNING) {
     64         return 0;
     65     }
     66     if(0 == uprv_strcmp(lang, "ja")) {
     67         return setCodes(JAPANESE, UPRV_LENGTHOF(JAPANESE), scripts, capacity, err);
     68     }
     69     if(0 == uprv_strcmp(lang, "ko")) {
     70         return setCodes(KOREAN, UPRV_LENGTHOF(KOREAN), scripts, capacity, err);
     71     }
     72     scriptLength = uloc_getScript(locale, script, UPRV_LENGTHOF(script), &internalErrorCode);
     73     if(U_FAILURE(internalErrorCode) || internalErrorCode == U_STRING_NOT_TERMINATED_WARNING) {
     74         return 0;
     75     }
     76     if(0 == uprv_strcmp(lang, "zh") && 0 == uprv_strcmp(script, "Hant")) {
     77         return setCodes(HAN_BOPO, UPRV_LENGTHOF(HAN_BOPO), scripts, capacity, err);
     78     }
     79     // Explicit script code.
     80     if(scriptLength != 0) {
     81         UScriptCode scriptCode = (UScriptCode)u_getPropertyValueEnum(UCHAR_SCRIPT, script);
     82         if(scriptCode != USCRIPT_INVALID_CODE) {
     83             if(scriptCode == USCRIPT_SIMPLIFIED_HAN || scriptCode == USCRIPT_TRADITIONAL_HAN) {
     84                 scriptCode = USCRIPT_HAN;
     85             }
     86             return setOneCode(scriptCode, scripts, capacity, err);
     87         }
     88     }
     89     return 0;
     90 }
     91 
     92 /* TODO: this is a bad API and should be deprecated, ticket #11141 */
     93 U_CAPI int32_t  U_EXPORT2
     94 uscript_getCode(const char* nameOrAbbrOrLocale,
     95                 UScriptCode* fillIn,
     96                 int32_t capacity,
     97                 UErrorCode* err){
     98     UBool triedCode;
     99     char likely[ULOC_FULLNAME_CAPACITY];
    100     UErrorCode internalErrorCode;
    101     int32_t length;
    102 
    103     if(U_FAILURE(*err)) {
    104         return 0;
    105     }
    106     if(nameOrAbbrOrLocale==NULL ||
    107             (fillIn == NULL ? capacity != 0 : capacity < 0)) {
    108         *err = U_ILLEGAL_ARGUMENT_ERROR;
    109         return 0;
    110     }
    111 
    112     triedCode = FALSE;
    113     if(uprv_strchr(nameOrAbbrOrLocale, '-')==NULL && uprv_strchr(nameOrAbbrOrLocale, '_')==NULL ){
    114         /* try long and abbreviated script names first */
    115         UScriptCode code = (UScriptCode) u_getPropertyValueEnum(UCHAR_SCRIPT, nameOrAbbrOrLocale);
    116         if(code!=USCRIPT_INVALID_CODE) {
    117             return setOneCode(code, fillIn, capacity, err);
    118         }
    119         triedCode = TRUE;
    120     }
    121     internalErrorCode = U_ZERO_ERROR;
    122     length = getCodesFromLocale(nameOrAbbrOrLocale, fillIn, capacity, err);
    123     if(U_FAILURE(*err) || length != 0) {
    124         return length;
    125     }
    126     (void)uloc_addLikelySubtags(nameOrAbbrOrLocale,
    127                                 likely, UPRV_LENGTHOF(likely), &internalErrorCode);
    128     if(U_SUCCESS(internalErrorCode) && internalErrorCode != U_STRING_NOT_TERMINATED_WARNING) {
    129         length = getCodesFromLocale(likely, fillIn, capacity, err);
    130         if(U_FAILURE(*err) || length != 0) {
    131             return length;
    132         }
    133     }
    134     if(!triedCode) {
    135         /* still not found .. try long and abbreviated script names again */
    136         UScriptCode code = (UScriptCode) u_getPropertyValueEnum(UCHAR_SCRIPT, nameOrAbbrOrLocale);
    137         if(code!=USCRIPT_INVALID_CODE) {
    138             return setOneCode(code, fillIn, capacity, err);
    139         }
    140     }
    141     return 0;
    142 }
    143