Standard Libraries for EDK II.

[mirror_edk2.git] / StdLib / LibC / Stdio / vswprintf.c

/*\r
 * Copyright (c) 1997 Todd C. Miller <Todd.Miller@courtesan.com>\r
 * All rights reserved.\r
 *\r
 * Redistribution and use in source and binary forms, with or without\r
 * modification, are permitted provided that the following conditions\r
 * are met:\r
 * 1. Redistributions of source code must retain the above copyright\r
 *    notice, this list of conditions and the following disclaimer.\r
 * 2. Redistributions in binary form must reproduce the above copyright\r
 *    notice, this list of conditions and the following disclaimer in the\r
 *    documentation and/or other materials provided with the distribution.\r
 * 3. The name of the author may not be used to endorse or promote products\r
 *    derived from this software without specific prior written permission.\r
 *\r
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,\r
 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY\r
 * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL\r
 * THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,\r
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,\r
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;\r
 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,\r
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR\r
 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF\r
 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.\r
\r
  FreeBSD: src/lib/libc/stdio/vswprintf.c,v 1.6 2005/02/21 19:41:44 fjoe Exp\r
  NetBSD: vswprintf.c,v 1.1 2005/05/14 23:51:02 christos Exp\r
 */\r
#include  <LibConfig.h>\r
#include  <sys/EfiCdefs.h>\r
\r
#include  <errno.h>\r
#include  <stdio.h>\r
#include  <stdlib.h>\r
#include  <wchar.h>\r
#include  <stdarg.h>\r
#include  "reentrant.h"\r
#include  "local.h"\r
\r
int\r
vswprintf(wchar_t * __restrict s, size_t n, const wchar_t * __restrict fmt,\r
    va_list ap)\r
{\r
  static const mbstate_t initial = { 0 };\r
  mbstate_t mbs;\r
  FILE f;\r
  char *mbp;\r
  int ret, sverrno;\r
  size_t nwc;\r
  struct __sfileext fext;\r
\r
  if (n == 0) {\r
    errno = EINVAL;\r
    return (-1);\r
  }\r
\r
  _FILEEXT_SETUP(&f, &fext);\r
  f._file = -1;\r
  f._flags = __SWR | __SSTR | __SALC;\r
  f._bf._base = f._p = (unsigned char *)malloc(128);\r
  if (f._bf._base == NULL) {\r
    errno = ENOMEM;\r
    return (-1);\r
  }\r
  f._bf._size = f._w = 127;   /* Leave room for the NUL */\r
  ret = __vfwprintf_unlocked(&f, fmt, ap);\r
  if (ret < 0) {\r
    sverrno = errno;\r
    free(f._bf._base);\r
    errno = sverrno;\r
    return (-1);\r
  }\r
  *f._p = '\0';\r
  mbp = (char *)f._bf._base;\r
  /*\r
   * XXX Undo the conversion from wide characters to multibyte that\r
   * fputwc() did in __vfwprintf().\r
   */\r
  mbs = initial;\r
  nwc = mbsrtowcs(s, (const char **)&mbp, n, &mbs);\r
  free(f._bf._base);\r
  if (nwc == (size_t)-1) {\r
    errno = EILSEQ;\r
    return (-1);\r
  }\r
  if (nwc == n) {\r
    s[n - 1] = L'\0';\r
    errno = EOVERFLOW;\r
    return (-1);\r
  }\r
\r
  return (ret);\r
}\r