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58548b9d68
In the future, this will result in a compilation failure if the macros are unexpectedly undefined (due to header inclusion ordering or header inclusion missing altogether). Assembler sources are more difficult to convert. In many cases, they are hand-optimized for the mangling and no-mangling variants, which is why they are not converted. sysdeps/s390/s390-32/__longjmp.c and sysdeps/s390/s390-64/__longjmp.c are special: These are C sources, but most of the implementation is in assembler, so the PTR_DEMANGLE macro has to be undefined in some cases, to match the assembler style. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
122 lines
3.4 KiB
C
122 lines
3.4 KiB
C
/* Copyright (C) 1996-2022 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 <pointer_guard.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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if (fcts->towc->__shlib_handle != NULL)
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PTR_DEMANGLE (fct);
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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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