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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>
124 lines
3.4 KiB
C
124 lines
3.4 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 <assert.h>
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#include <dlfcn.h>
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#include <errno.h>
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#include <gconv.h>
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#include <wchar.h>
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#include <wcsmbsload.h>
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#include <sysdep.h>
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#ifndef EILSEQ
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# define EILSEQ EINVAL
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#endif
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/* This is the private state used if PS is NULL. */
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static mbstate_t state;
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size_t
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__mbrtowc (wchar_t *pwc, const char *s, size_t n, mbstate_t *ps)
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{
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wchar_t buf[1];
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struct __gconv_step_data data;
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int status;
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size_t result;
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size_t dummy;
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const unsigned char *inbuf, *endbuf;
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unsigned char *outbuf = (unsigned char *) (pwc ?: buf);
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const struct gconv_fcts *fcts;
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/* Set information for this step. */
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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 = ps ?: &state;
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/* A first special case is if S is NULL. This means put PS in the
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initial state. */
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if (s == NULL)
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{
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outbuf = (unsigned char *) buf;
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s = "";
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n = 1;
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}
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if (n == 0)
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return (size_t) -2;
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/* Tell where we want the result. */
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data.__outbuf = outbuf;
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data.__outbufend = outbuf + sizeof (wchar_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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/* Do a normal conversion. */
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inbuf = (const unsigned char *) s;
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endbuf = inbuf + n;
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if (__glibc_unlikely (endbuf < inbuf))
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{
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endbuf = (const unsigned char *) ~(uintptr_t) 0;
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if (endbuf == inbuf)
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goto ilseq;
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}
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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, &inbuf, endbuf,
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NULL, &dummy, 0, 1));
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/* There must not be any problems with the conversion but illegal input
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characters. The output buffer must be large enough, otherwise the
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definition of MB_CUR_MAX is not correct. All the other possible
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errors also must not happen. */
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assert (status == __GCONV_OK || status == __GCONV_EMPTY_INPUT
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|| status == __GCONV_ILLEGAL_INPUT
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|| status == __GCONV_INCOMPLETE_INPUT
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|| status == __GCONV_FULL_OUTPUT);
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if (status == __GCONV_OK || status == __GCONV_EMPTY_INPUT
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|| status == __GCONV_FULL_OUTPUT)
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{
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if (data.__outbuf != (unsigned char *) outbuf
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&& *(wchar_t *) outbuf == L'\0')
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{
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/* The converted character is the NUL character. */
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assert (__mbsinit (data.__statep));
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result = 0;
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}
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else
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result = inbuf - (const unsigned char *) s;
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}
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else if (status == __GCONV_INCOMPLETE_INPUT)
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result = (size_t) -2;
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else
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{
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ilseq:
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result = (size_t) -1;
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__set_errno (EILSEQ);
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}
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return result;
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}
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libc_hidden_def (__mbrtowc)
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weak_alias (__mbrtowc, mbrtowc)
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libc_hidden_weak (mbrtowc)
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