usr/src/lib/libc/port/i18n/wsprintf.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 (the "License").
   6  * You may not use this file except in compliance with the License.
   7  *
   8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
   9  * or http://www.opensolaris.org/os/licensing.
  10  * See the License for the specific language governing permissions
  11  * and limitations under the License.
  12  *
  13  * When distributing Covered Code, include this CDDL HEADER in each
  14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  15  * If applicable, add the following below this CDDL HEADER, with the
  16  * fields enclosed by brackets "[]" replaced with your own identifying
  17  * information: Portions Copyright [yyyy] [name of copyright owner]
  18  *
  19  * CDDL HEADER END
  20  */
  21
  22 /*
  23  * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
  24  * Use is subject to license terms.
  25  */
  26
  27 /*      Copyright (c) 1986 AT&T */
  28 /*        All Rights Reserved   */
  29
  30 #pragma ident   "%Z%%M% %I%     %E% SMI"
  31
  32 #include "lint.h"
  33 #include <stdio.h>
  34 #include <stdarg.h>
  35 #include <stdlib.h>
  36 #include <widec.h>
  37 #include <string.h>
  38 #include <limits.h>
  39
  40 /*
  41  *      wsprintf -- this function will output a wchar_t string
  42  *                  according to the conversion format.
  43  *                  Note that the maximum length of the output
  44  *                  string is 1024 bytes.
  45  */
  46
  47 /*VARARGS2*/
  48 int
  49 wsprintf(wchar_t *wstring, const char *format, ...)
  50 {
  51         va_list ap;
  52         char    tempstring[1024];
  53         char *p2;
  54         size_t len;
  55         int malloced = 0;
  56         char *p1 = (char *)wstring;
  57         int retcode;
  58         int     i;
  59
  60         va_start(ap, format);
  61         if (vsprintf(p1, format, ap) == -1) {
  62                 va_end(ap);
  63                 return (-1);
  64         }
  65         va_end(ap);
  66         len = strlen(p1) + 1;
  67         if (len > 1024) {
  68                 p2 = malloc(len);
  69                 if (p2 == NULL)
  70                         return (-1);
  71                 malloced = 1;
  72         } else
  73                 p2 = tempstring;
  74         (void) strcpy(p2, p1);
  75
  76         if (mbstowcs(wstring, p2, len) == (size_t)-1) {
  77                 for (i = 0; i < len; i++) {
  78                         if ((retcode = mbtowc(wstring, p2, MB_CUR_MAX)) == -1) {
  79                                 *wstring = (wchar_t)*p2 & 0xff;
  80                                 p2++;
  81                         } else {
  82                                 p2 += retcode;
  83                         }
  84                         if (*wstring++ == (wchar_t)0) {
  85                                 break;
  86                         }
  87                 }
  88         }
  89
  90         if (malloced == 1)
  91                 free(p2);
  92         len = wcslen(wstring);
  93         if (len <= INT_MAX)
  94                 return ((int)len);
  95         else
  96                 return (EOF);
  97 }