icuSources/common/ures_cnv.c

   1 /*
   2 *******************************************************************************
   3 *
   4 *   Copyright (C) 1997-2006, International Business Machines
   5 *   Corporation and others.  All Rights Reserved.
   6 *
   7 *******************************************************************************
   8 *   file name:  ures_cnv.c
   9 *   encoding:   US-ASCII
  10 *   tab size:   8 (not used)
  11 *   indentation:4
  12 *
  13 *   created on: 2004aug25
  14 *   created by: Markus W. Scherer
  15 *
  16 *   Character conversion functions moved here from uresbund.c
  17 */
  18
  19 #include "unicode/utypes.h"
  20 #include "unicode/putil.h"
  21 #include "unicode/ustring.h"
  22 #include "unicode/ucnv.h"
  23 #include "unicode/ures.h"
  24 #include "uinvchar.h"
  25 #include "ustr_cnv.h"
  26
  27 U_CAPI UResourceBundle * U_EXPORT2
  28 ures_openU(const UChar *myPath,
  29            const char *localeID,
  30            UErrorCode *status)
  31 {
  32     char pathBuffer[1024];
  33     int32_t length;
  34     char *path = pathBuffer;
  35
  36     if(status==NULL || U_FAILURE(*status)) {
  37         return NULL;
  38     }
  39     if(myPath==NULL) {
  40         path = NULL;
  41     }
  42     else {
  43         length=u_strlen(myPath);
  44         if(length>=sizeof(pathBuffer)) {
  45             *status=U_ILLEGAL_ARGUMENT_ERROR;
  46             return NULL;
  47         } else if(uprv_isInvariantUString(myPath, length)) {
  48             /*
  49              * the invariant converter is sufficient for package and tree names
  50              * and is more efficient
  51              */
  52             u_UCharsToChars(myPath, path, length+1); /* length+1 to include the NUL */
  53         } else {
  54 #if !UCONFIG_NO_CONVERSION
  55             /* use the default converter to support variant-character paths */
  56             UConverter *cnv=u_getDefaultConverter(status);
  57             length=ucnv_fromUChars(cnv, path, (int32_t)sizeof(pathBuffer), myPath, length, status);
  58             u_releaseDefaultConverter(cnv);
  59             if(U_FAILURE(*status)) {
  60                 return NULL;
  61             }
  62             if(length>=sizeof(pathBuffer)) {
  63                 /* not NUL-terminated - path too long */
  64                 *status=U_ILLEGAL_ARGUMENT_ERROR;
  65                 return NULL;
  66             }
  67 #else
  68             /* the default converter is not available */
  69             *status=U_UNSUPPORTED_ERROR;
  70             return NULL;
  71 #endif
  72         }
  73     }
  74
  75     return ures_open(path, localeID, status);
  76 }