icuSources/common/uscript.c

   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 }