intl/icu/source/common/ures_cnv.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) 1997-2006, International Business Machines
   7 *   Corporation and others.  All Rights Reserved.
   8 *
   9 *******************************************************************************
  10 *   file name:  ures_cnv.c
  11 *   encoding:   UTF-8
  12 *   tab size:   8 (not used)
  13 *   indentation:4
  14 *
  15 *   created on: 2004aug25
  16 *   created by: Markus W. Scherer
  17 *
  18 *   Character conversion functions moved here from uresbund.c
  19 */
  20
  21 #include "unicode/utypes.h"
  22 #include "unicode/putil.h"
  23 #include "unicode/ustring.h"
  24 #include "unicode/ucnv.h"
  25 #include "unicode/ures.h"
  26 #include "uinvchar.h"
  27 #include "ustr_cnv.h"
  28
  29 U_CAPI UResourceBundle * U_EXPORT2
  30 ures_openU(const char16_t *myPath,
  31            const char *localeID,
  32            UErrorCode *status)
  33 {
  34     char pathBuffer[1024];
  35     int32_t length;
  36     char *path = pathBuffer;
  37
  38     if(status==nullptr || U_FAILURE(*status)) {
  39         return nullptr;
  40     }
  41     if(myPath==nullptr) {
  42         path = nullptr;
  43     }
  44     else {
  45         length=u_strlen(myPath);
  46         if(length>=(int32_t)sizeof(pathBuffer)) {
  47             *status=U_ILLEGAL_ARGUMENT_ERROR;
  48             return nullptr;
  49         } else if(uprv_isInvariantUString(myPath, length)) {
  50             /*
  51              * the invariant converter is sufficient for package and tree names
  52              * and is more efficient
  53              */
  54             u_UCharsToChars(myPath, path, length+1); /* length+1 to include the NUL */
  55         } else {
  56 #if !UCONFIG_NO_CONVERSION
  57             /* use the default converter to support variant-character paths */
  58             UConverter *cnv=u_getDefaultConverter(status);
  59             length=ucnv_fromUChars(cnv, path, (int32_t)sizeof(pathBuffer), myPath, length, status);
  60             u_releaseDefaultConverter(cnv);
  61             if(U_FAILURE(*status)) {
  62                 return nullptr;
  63             }
  64             if(length>=(int32_t)sizeof(pathBuffer)) {
  65                 /* not NUL-terminated - path too long */
  66                 *status=U_ILLEGAL_ARGUMENT_ERROR;
  67                 return nullptr;
  68             }
  69 #else
  70             /* the default converter is not available */
  71             *status=U_UNSUPPORTED_ERROR;
  72             return nullptr;
  73 #endif
  74         }
  75     }
  76
  77     return ures_open(path, localeID, status);
  78 }