icuSources/common/ures_cnv.c

   1 /*
   2 *******************************************************************************
   3 *
   4 *   Copyright (C) 1997-2004, 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     char path[2048];
  32     int32_t length;
  33
  34     if(status==NULL || U_FAILURE(*status)) {
  35         return NULL;
  36     }
  37     if(myPath==NULL) {
  38         *status=U_ILLEGAL_ARGUMENT_ERROR;
  39         return NULL;
  40     }
  41
  42     length=u_strlen(myPath);
  43     if(length>=sizeof(path)) {
  44         *status=U_ILLEGAL_ARGUMENT_ERROR;
  45         return NULL;
  46     } else if(uprv_isInvariantUString(myPath, length)) {
  47         /*
  48          * the invariant converter is sufficient for package and tree names
  49          * and is more efficient
  50          */
  51         u_UCharsToChars(myPath, path, length+1); /* length+1 to include the NUL */
  52     } else {
  53 #if !UCONFIG_NO_CONVERSION
  54         /* use the default converter to support variant-character paths */
  55         UConverter *cnv=u_getDefaultConverter(status);
  56         if(U_FAILURE(*status)) {
  57             return NULL;
  58         }
  59
  60         length=ucnv_fromUChars(cnv, path, (int32_t)sizeof(path), myPath, length, status);
  61         u_releaseDefaultConverter(cnv);
  62         if(U_FAILURE(*status)) {
  63             return NULL;
  64         }
  65         if(length>=sizeof(path)) {
  66             /* not NUL-terminated - path too long */
  67             *status=U_ILLEGAL_ARGUMENT_ERROR;
  68             return NULL;
  69         }
  70 #else
  71         /* the default converter is not available */
  72         *status=U_UNSUPPORTED_ERROR;
  73         return NULL;
  74 #endif
  75     }
  76
  77     return ures_open(path, localeID, status);
  78 }