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91682d7038
2005-04-01 Ulrich Drepper <drepper@redhat.com> * wcsmbs/btowc.c (__btowc): Optimize parameters in ASCII range. * wcsmbs/wctob.c (wctob): Likewise. * wcsmbs/wchar.h (btowc): Add optimized inline function. (wctob): Likewise.
79 lines
2.4 KiB
C
79 lines
2.4 KiB
C
/* Copyright (C) 1996-2000, 2002, 2003, 2005 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Ulrich Drepper <drepper@gnu.ai.mit.edu>, 1996.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, write to the Free
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Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 USA. */
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#include <dlfcn.h>
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#include <gconv.h>
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#include <stdio.h>
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#include <string.h>
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#include <wchar.h>
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#include <wcsmbsload.h>
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int
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wctob (c)
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wint_t c;
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{
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unsigned char buf[MB_LEN_MAX];
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struct __gconv_step_data data;
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wchar_t inbuf[1];
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wchar_t *inptr = inbuf;
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size_t dummy;
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int status;
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const struct gconv_fcts *fcts;
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if (c == WEOF)
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return EOF;
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/* We know that only ASCII compatible encodings are used for the
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locale and that the wide character encoding is ISO 10646. */
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if (c >= L'\0' && c <= L'\x7f')
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return (int) c;
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/* Tell where we want the result. */
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data.__outbuf = buf;
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data.__outbufend = buf + MB_LEN_MAX;
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data.__invocation_counter = 0;
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data.__internal_use = 1;
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data.__flags = __GCONV_IS_LAST;
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data.__statep = &data.__state;
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data.__trans = NULL;
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/* Make sure we start in the initial state. */
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memset (&data.__state, '\0', sizeof (mbstate_t));
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/* Get the conversion functions. */
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fcts = get_gconv_fcts (_NL_CURRENT_DATA (LC_CTYPE));
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/* Create the input string. */
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inbuf[0] = c;
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const unsigned char *argptr = (const unsigned char *) inptr;
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status = DL_CALL_FCT (fcts->tomb->__fct,
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(fcts->tomb, &data, &argptr,
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argptr + sizeof (inbuf[0]), NULL, &dummy, 0, 1));
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/* The conversion failed or the output is too long. */
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if ((status != __GCONV_OK && status != __GCONV_FULL_OUTPUT
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&& status != __GCONV_EMPTY_INPUT)
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|| data.__outbuf != (unsigned char *) (buf + 1))
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return EOF;
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return buf[0];
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}
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