icuSources/common/ucnvdisp.c

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