usr/src/lib/libbc/libc/gen/common/mbstowcs.c

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License, Version 1.0 only
   6  * (the "License").  You may not use this file except in compliance
   7  * with the License.
   8  *
   9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
  10  * or http://www.opensolaris.org/os/licensing.
  11  * See the License for the specific language governing permissions
  12  * and limitations under the License.
  13  *
  14  * When distributing Covered Code, include this CDDL HEADER in each
  15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  16  * If applicable, add the following below this CDDL HEADER, with the
  17  * fields enclosed by brackets "[]" replaced with your own identifying
  18  * information: Portions Copyright [yyyy] [name of copyright owner]
  19  *
  20  * CDDL HEADER END
  21  */
  22 /*
  23  * Copyright 1993 Sun Microsystems, Inc.  All rights reserved.
  24  * Use is subject to license terms.
  25  */
  26
  27 /*
  28  * mbstowcs
  29  */
  30
  31 #pragma ident   "%Z%%M% %I%     %E% SMI"
  32
  33 #if !defined(lint) && defined(SCCSIDS)
  34 static  char *sccsid = "%Z%%M%  %I%     %E% SMI";
  35 #endif
  36
  37 #include <sys/types.h>
  38 #include "codeset.h"
  39 #include "mbextern.h"
  40
  41 int
  42 mbstowcs(pwcs, s, n)
  43         wchar_t * pwcs;
  44         char *s;
  45         size_t n;
  46 {
  47         char *handle;           /* handle */
  48         int (*p)();
  49         int num = 0;
  50         int ret;
  51
  52         switch (_code_set_info.code_id) {
  53         case CODESET_NONE:
  54                 /*
  55                  * default code set,
  56                  */
  57                  while (*s && num < n) {
  58                         *pwcs++ = (wchar_t)*s++;
  59                         num++;
  60                  }
  61                  if (num < n)
  62                         *pwcs = 0;
  63                 return (num);
  64                 break;
  65         case CODESET_EUC:
  66                 /*
  67                  * EUC code set
  68                  */
  69                  return(_mbstowcs_euc(pwcs, s, n));
  70                  break;
  71
  72         case CODESET_XCCS:
  73                 /*
  74                  * XCCS code set
  75                  */
  76                 return(_mbstowcs_xccs(pwcs, s, n));
  77                 break;
  78
  79         case CODESET_ISO2022:
  80                 /*
  81                  * ISO family
  82                  */
  83                 return(_mbstowcs_iso(pwcs, s, n));
  84                 break;
  85
  86         default:
  87                 /*
  88                  * User defined code set
  89                  */
  90                  handle = _ml_open_library();
  91                  if (handle == (void *)NULL)
  92                         return(ERROR_NO_LIB);   /* No user library */
  93                  p = (int (*)()) dlsym(handle, "_mbstowcs");
  94                  if (p == (int (*)()) NULL)
  95                         return(ERROR_NO_SYM);
  96                  ret = (*p)(pwcs, s, n);
  97                  return (ret);
  98                  break;
  99         }
 100         /* NOTREACHED */
 101 }