diff options
Diffstat (limited to 'REORG.TODO/wcsmbs/mbrtowc.c')
| -rw-r--r-- | REORG.TODO/wcsmbs/mbrtowc.c | 129 |
1 files changed, 129 insertions, 0 deletions
diff --git a/REORG.TODO/wcsmbs/mbrtowc.c b/REORG.TODO/wcsmbs/mbrtowc.c new file mode 100644 index 0000000000..ea207bd0c6 --- /dev/null +++ b/REORG.TODO/wcsmbs/mbrtowc.c @@ -0,0 +1,129 @@ +/* Copyright (C) 1996-2017 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Ulrich Drepper <drepper@gnu.org>, 1996. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + <http://www.gnu.org/licenses/>. */ + +#include <assert.h> +#include <dlfcn.h> +#include <errno.h> +#include <gconv.h> +#include <wchar.h> +#include <wcsmbsload.h> + +#include <sysdep.h> + +#ifndef EILSEQ +# define EILSEQ EINVAL +#endif + +/* This is the private state used if PS is NULL. */ +static mbstate_t state; + +size_t +__mbrtowc (wchar_t *pwc, const char *s, size_t n, mbstate_t *ps) +{ + wchar_t buf[1]; + struct __gconv_step_data data; + int status; + size_t result; + size_t dummy; + const unsigned char *inbuf, *endbuf; + unsigned char *outbuf = (unsigned char *) (pwc ?: buf); + const struct gconv_fcts *fcts; + + /* Set information for this step. */ + data.__invocation_counter = 0; + data.__internal_use = 1; + data.__flags = __GCONV_IS_LAST; + data.__statep = ps ?: &state; + + /* A first special case is if S is NULL. This means put PS in the + initial state. */ + if (s == NULL) + { + outbuf = (unsigned char *) buf; + s = ""; + n = 1; + } + + if (n == 0) + return (size_t) -2; + + /* Tell where we want the result. */ + data.__outbuf = outbuf; + data.__outbufend = outbuf + sizeof (wchar_t); + + /* Get the conversion functions. */ + fcts = get_gconv_fcts (_NL_CURRENT_DATA (LC_CTYPE)); + + /* Do a normal conversion. */ + inbuf = (const unsigned char *) s; + endbuf = inbuf + n; + if (__glibc_unlikely (endbuf < inbuf)) + { + endbuf = (const unsigned char *) ~(uintptr_t) 0; + if (endbuf == inbuf) + goto ilseq; + } + __gconv_fct fct = fcts->towc->__fct; +#ifdef PTR_DEMANGLE + if (fcts->towc->__shlib_handle != NULL) + PTR_DEMANGLE (fct); +#endif + status = DL_CALL_FCT (fct, (fcts->towc, &data, &inbuf, endbuf, + NULL, &dummy, 0, 1)); + + /* There must not be any problems with the conversion but illegal input + characters. The output buffer must be large enough, otherwise the + definition of MB_CUR_MAX is not correct. All the other possible + errors also must not happen. */ + assert (status == __GCONV_OK || status == __GCONV_EMPTY_INPUT + || status == __GCONV_ILLEGAL_INPUT + || status == __GCONV_INCOMPLETE_INPUT + || status == __GCONV_FULL_OUTPUT); + + if (status == __GCONV_OK || status == __GCONV_EMPTY_INPUT + || status == __GCONV_FULL_OUTPUT) + { + if (data.__outbuf != (unsigned char *) outbuf + && *(wchar_t *) outbuf == L'\0') + { + /* The converted character is the NUL character. */ + assert (__mbsinit (data.__statep)); + result = 0; + } + else + result = inbuf - (const unsigned char *) s; + } + else if (status == __GCONV_INCOMPLETE_INPUT) + result = (size_t) -2; + else + { + ilseq: + result = (size_t) -1; + __set_errno (EILSEQ); + } + + return result; +} +libc_hidden_def (__mbrtowc) +weak_alias (__mbrtowc, mbrtowc) +libc_hidden_weak (mbrtowc) + +/* There should be no difference between the UTF-32 handling required + by mbrtoc32 and the wchar_t handling which has long since been + implemented in mbrtowc. */ +weak_alias (__mbrtowc, mbrtoc32) |