Standard Libraries for EDK II.

[mirror_edk2.git] / StdLib / LibC / Locale / multibyte_sb.c

/*  $NetBSD: multibyte_sb.c,v 1.5 2004/07/21 20:27:46 tshiozak Exp $  */\r
\r
/*\r
 * Copyright (c) 1991 The Regents of the University of California.\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. Neither the name of the University nor the names of its contributors\r
 *    may be used to endorse or promote products derived from this software\r
 *    without specific prior written permission.\r
 *\r
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND\r
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE\r
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE\r
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE\r
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL\r
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS\r
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)\r
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT\r
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY\r
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF\r
 * SUCH DAMAGE.\r
 */\r
#include  <LibConfig.h>\r
#include  <sys/EfiCdefs.h>\r
#if defined(LIBC_SCCS) && !defined(lint)\r
#if 0\r
static char *sccsid = "from: @(#)multibyte.c  5.1 (Berkeley) 2/18/91";\r
#else\r
__RCSID("$NetBSD: multibyte_sb.c,v 1.5 2004/07/21 20:27:46 tshiozak Exp $");\r
#endif\r
#endif /* LIBC_SCCS and not lint */\r
\r
#include <assert.h>\r
#include <errno.h>\r
#include <stdlib.h>\r
#include <wchar.h>\r
\r
/*\r
 * Stub multibyte character functions.\r
 * This cheezy implementation is fixed to the native single-byte\r
 * character set.\r
 */\r
\r
/*ARGSUSED*/\r
int\r
mbsinit(const mbstate_t *ps)\r
{\r
\r
  return 1;\r
}\r
\r
/*ARGSUSED*/\r
size_t\r
mbrlen(\r
  const char *s,\r
  size_t n,\r
  mbstate_t *ps\r
  )\r
{\r
\r
  /* ps appears to be unused */\r
\r
  if (s == NULL || *s == '\0')\r
    return 0;\r
  if (n == 0)\r
    return (size_t)-1;\r
  return 1;\r
}\r
\r
int\r
mblen(\r
  const char *s,\r
  size_t n\r
  )\r
{\r
\r
  /* s may be NULL */\r
\r
  return (int)mbrlen(s, n, NULL);\r
}\r
\r
/*ARGSUSED*/\r
size_t\r
mbrtowc(\r
  wchar_t *pwc,\r
  const char *s,\r
  size_t n,\r
  mbstate_t *ps\r
  )\r
{\r
\r
  /* pwc may be NULL */\r
  /* s may be NULL */\r
  /* ps appears to be unused */\r
\r
  if (s == NULL)\r
    return 0;\r
  if (n == 0)\r
    return (size_t)-1;\r
  if (pwc)\r
    *pwc = (wchar_t) *s;\r
  return (*s != '\0');\r
}\r
\r
int\r
mbtowc(\r
  wchar_t *pwc,\r
  const char *s,\r
  size_t n\r
  )\r
{\r
\r
  /* pwc may be NULL */\r
  /* s may be NULL */\r
\r
  return (int)mbrtowc(pwc, s, n, NULL);\r
}\r
\r
/*ARGSUSED*/\r
size_t\r
wcrtomb(\r
  char *s,\r
  wchar_t wchar,\r
  mbstate_t *ps\r
  )\r
{\r
\r
  /* s may be NULL */\r
  /* ps appears to be unused */\r
\r
  if (s == NULL)\r
    return 0;\r
\r
  *s = (char) wchar;\r
  return 1;\r
}\r
\r
int\r
wctomb(\r
  char *s,\r
  wchar_t wchar\r
  )\r
{\r
\r
  /* s may be NULL */\r
\r
  return (int)wcrtomb(s, wchar, NULL);\r
}\r
\r
/*ARGSUSED*/\r
size_t\r
mbsrtowcs(\r
  wchar_t *pwcs,\r
  const char **s,\r
  size_t n,\r
  mbstate_t *ps\r
  )\r
{\r
  int count = 0;\r
\r
  /* pwcs may be NULL */\r
  /* s may be NULL */\r
  /* ps appears to be unused */\r
\r
  if (!s || !*s)\r
    return 0;\r
\r
  if (n != 0) {\r
    if (pwcs != NULL) {\r
      do {\r
        if ((*pwcs++ = (wchar_t) *(*s)++) == 0)\r
          break;\r
        count++;\r
      } while (--n != 0);\r
    } else {\r
      do {\r
        if (((wchar_t)*(*s)++) == 0)\r
          break;\r
        count++;\r
      } while (--n != 0);\r
    }\r
  }\r
\r
  return count;\r
}\r
\r
size_t\r
mbstowcs(\r
  wchar_t *pwcs,\r
  const char *s,\r
  size_t n\r
  )\r
{\r
\r
  /* pwcs may be NULL */\r
  /* s may be NULL */\r
\r
  return mbsrtowcs(pwcs, &s, n, NULL);\r
}\r
\r
/*ARGSUSED*/\r
size_t\r
wcsrtombs(\r
  char *s,\r
  const wchar_t **pwcs,\r
  size_t n,\r
  mbstate_t *ps\r
  )\r
{\r
  int count = 0;\r
\r
  /* s may be NULL */\r
  /* pwcs may be NULL */\r
  /* ps appears to be unused */\r
\r
  if (pwcs == NULL || *pwcs == NULL)\r
    return (0);\r
\r
  if (s == NULL) {\r
    while (*(*pwcs)++ != 0)\r
      count++;\r
    return(count);\r
  }\r
\r
  if (n != 0) {\r
    do {\r
      if ((*s++ = (char) *(*pwcs)++) == 0)\r
        break;\r
      count++;\r
    } while (--n != 0);\r
  }\r
\r
  return count;\r
}\r
\r
size_t\r
wcstombs(\r
  char *s,\r
  const wchar_t *pwcs,\r
  size_t n\r
  )\r
{\r
\r
  /* s may be NULL */\r
  /* pwcs may be NULL */\r
\r
  return wcsrtombs(s, &pwcs, n, NULL);\r
}\r
\r
wint_t\r
btowc(int c)\r
{\r
  if (c == EOF || c & ~0xFF)\r
    return WEOF;\r
  return (wint_t)c;\r
}\r
\r
int\r
wctob(wint_t c)\r
{\r
  if (c == WEOF || c & ~0xFF)\r
    return EOF;\r
  return (int)c;\r
}\r