icuSources/common/ucnvdisp.cpp

   1 // © 2016 and later: Unicode, Inc. and others.
   2 // License & terms of use: http://www.unicode.org/copyright.html
   3 /*
   4 ******************************************************************************
   5 *
   6 *   Copyright (C) 1998-2004, International Business Machines
   7 *   Corporation and others.  All Rights Reserved.
   8 *
   9 ******************************************************************************
  10 *
  11 *  ucnvdisp.c:
  12 *  Implements APIs for the ICU's codeset conversion library display names.
  13 *
  14 * Modification History:
  15 *
  16 *   Date        Name        Description
  17 *   04/04/99    helena      Fixed internal header inclusion.
  18 *   05/09/00    helena      Added implementation to handle fallback mappings.
  19 *   06/20/2000  helena      OS/400 port changes; mostly typecast.
  20 *   09/08/2004  grhoten     split from ucnv.c
  21 */
  22
  23 #include "unicode/utypes.h"
  24
  25 #if !UCONFIG_NO_CONVERSION
  26
  27 #include "unicode/ustring.h"
  28 #include "unicode/ures.h"
  29 #include "unicode/ucnv.h"
  30 #include "cstring.h"
  31 #include "ustr_imp.h"
  32 #include "ucnv_imp.h"
  33 #include "putilimp.h"
  34
  35 U_CAPI int32_t U_EXPORT2
  36 ucnv_getDisplayName(const UConverter *cnv,
  37                     const char *displayLocale,
  38                     UChar *displayName, int32_t displayNameCapacity,
  39                     UErrorCode *pErrorCode) {
  40     UResourceBundle *rb;
  41     const UChar *name;
  42     int32_t length;
  43     UErrorCode localStatus = U_ZERO_ERROR;
  44
  45     /* check arguments */
  46     if(pErrorCode==NULL || U_FAILURE(*pErrorCode)) {
  47         return 0;
  48     }
  49
  50     if(cnv==NULL || displayNameCapacity<0 || (displayNameCapacity>0 && displayName==NULL)) {
  51         *pErrorCode=U_ILLEGAL_ARGUMENT_ERROR;
  52         return 0;
  53     }
  54
  55     /* open the resource bundle and get the display name string */
  56     rb=ures_open(NULL, displayLocale, pErrorCode);
  57     if(U_FAILURE(*pErrorCode)) {
  58         return 0;
  59     }
  60
  61     /* use the internal name as the key */
  62     name=ures_getStringByKey(rb, cnv->sharedData->staticData->name, &length, &localStatus);
  63     ures_close(rb);
  64
  65     if(U_SUCCESS(localStatus)) {
  66         /* copy the string */
  67         if (*pErrorCode == U_ZERO_ERROR) {
  68             *pErrorCode = localStatus;
  69         }
  70         u_memcpy(displayName, name, uprv_min(length, displayNameCapacity)*U_SIZEOF_UCHAR);
  71     } else {
  72         /* convert the internal name into a Unicode string */
  73         length=(int32_t)uprv_strlen(cnv->sharedData->staticData->name);
  74         u_charsToUChars(cnv->sharedData->staticData->name, displayName, uprv_min(length, displayNameCapacity));
  75     }
  76     return u_terminateUChars(displayName, displayNameCapacity, length, pErrorCode);
  77 }
  78
  79 #endif
  80
  81 /*
  82  * Hey, Emacs, please set the following:
  83  *
  84  * Local Variables:
  85  * indent-tabs-mode: nil
  86  * End:
  87  *
  88  */