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30891f35fa
We stopped adding "Contributed by" or similar lines in sources in 2012 in favour of git logs and keeping the Contributors section of the glibc manual up to date. Removing these lines makes the license header a bit more consistent across files and also removes the possibility of error in attribution when license blocks or files are copied across since the contributed-by lines don't actually reflect reality in those cases. Move all "Contributed by" and similar lines (Written by, Test by, etc.) into a new file CONTRIBUTED-BY to retain record of these contributions. These contributors are also mentioned in manual/contrib.texi, so we just maintain this additional record as a courtesy to the earlier developers. The following scripts were used to filter a list of files to edit in place and to clean up the CONTRIBUTED-BY file respectively. These were not added to the glibc sources because they're not expected to be of any use in future given that this is a one time task: https://gist.github.com/siddhesh/b5ecac94eabfd72ed2916d6d8157e7dc https://gist.github.com/siddhesh/15ea1f5e435ace9774f485030695ee02 Reviewed-by: Carlos O'Donell <carlos@redhat.com>
100 lines
2.9 KiB
C
100 lines
2.9 KiB
C
/* Copyright (C) 1996-2021 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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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, see
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<https://www.gnu.org/licenses/>. */
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#include <ctype.h>
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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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#include <limits.h>
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#include <sysdep.h>
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wint_t
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__btowc (int c)
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{
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const struct gconv_fcts *fcts;
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/* If the parameter does not fit into one byte or it is the EOF value
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we can give the answer now. */
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if (c < SCHAR_MIN || c > UCHAR_MAX || c == EOF)
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return WEOF;
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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 (isascii (c))
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return (wint_t) c;
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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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__gconv_btowc_fct btowc_fct = fcts->towc->__btowc_fct;
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#ifdef PTR_DEMANGLE
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if (fcts->towc->__shlib_handle != NULL)
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PTR_DEMANGLE (btowc_fct);
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#endif
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if (__builtin_expect (fcts->towc_nsteps == 1, 1)
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&& __builtin_expect (btowc_fct != NULL, 1))
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{
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/* Use the shortcut function. */
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return DL_CALL_FCT (btowc_fct, (fcts->towc, (unsigned char) c));
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}
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else
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{
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/* Fall back to the slow but generic method. */
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wchar_t result;
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struct __gconv_step_data data;
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unsigned char inbuf[1];
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const unsigned char *inptr = inbuf;
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size_t dummy;
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int status;
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/* Tell where we want the result. */
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data.__outbuf = (unsigned char *) &result;
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data.__outbufend = data.__outbuf + sizeof (wchar_t);
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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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/* Make sure we start in the initial state. */
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memset (&data.__state, '\0', sizeof (mbstate_t));
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/* Create the input string. */
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inbuf[0] = c;
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__gconv_fct fct = fcts->towc->__fct;
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#ifdef PTR_DEMANGLE
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if (fcts->towc->__shlib_handle != NULL)
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PTR_DEMANGLE (fct);
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#endif
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status = DL_CALL_FCT (fct, (fcts->towc, &data, &inptr, inptr + 1,
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NULL, &dummy, 0, 1));
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if (status != __GCONV_OK && status != __GCONV_FULL_OUTPUT
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&& status != __GCONV_EMPTY_INPUT)
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/* The conversion failed. */
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result = WEOF;
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return result;
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}
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}
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weak_alias (__btowc, btowc)
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