diff options
Diffstat (limited to 'REORG.TODO/wcsmbs/mbsnrtowcs.c')
| -rw-r--r-- | REORG.TODO/wcsmbs/mbsnrtowcs.c | 143 |
1 files changed, 143 insertions, 0 deletions
diff --git a/REORG.TODO/wcsmbs/mbsnrtowcs.c b/REORG.TODO/wcsmbs/mbsnrtowcs.c new file mode 100644 index 0000000000..ed51678e5b --- /dev/null +++ b/REORG.TODO/wcsmbs/mbsnrtowcs.c @@ -0,0 +1,143 @@ +/* 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 <string.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; + +/* This is a non-standard function but it is very useful in the + implementation of stdio because we have to deal with unterminated + buffers. At most NMC bytes will be converted. */ +size_t +__mbsnrtowcs (wchar_t *dst, const char **src, size_t nmc, size_t len, + mbstate_t *ps) +{ + const unsigned char *srcend; + struct __gconv_step_data data; + size_t result; + int status; + struct __gconv_step *towc; + size_t dummy; + const struct gconv_fcts *fcts; + + /* Tell where we want the result. */ + data.__invocation_counter = 0; + data.__internal_use = 1; + data.__flags = __GCONV_IS_LAST; + data.__statep = ps ?: &state; + + if (nmc == 0) + return 0; + srcend = (const unsigned char *) *src + __strnlen (*src, nmc - 1) + 1; + + /* Get the conversion functions. */ + fcts = get_gconv_fcts (_NL_CURRENT_DATA (LC_CTYPE)); + + /* Get the structure with the function pointers. */ + towc = fcts->towc; + __gconv_fct fct = towc->__fct; +#ifdef PTR_DEMANGLE + if (towc->__shlib_handle != NULL) + PTR_DEMANGLE (fct); +#endif + + /* We have to handle DST == NULL special. */ + if (dst == NULL) + { + mbstate_t temp_state; + wchar_t buf[64]; /* Just an arbitrary size. */ + const unsigned char *inbuf = (const unsigned char *) *src; + + temp_state = *data.__statep; + data.__statep = &temp_state; + + result = 0; + data.__outbufend = (unsigned char *) buf + sizeof (buf); + do + { + data.__outbuf = (unsigned char *) buf; + + status = DL_CALL_FCT (fct, (towc, &data, &inbuf, srcend, NULL, + &dummy, 0, 1)); + + result += (wchar_t *) data.__outbuf - buf; + } + while (status == __GCONV_FULL_OUTPUT); + + if ((status == __GCONV_OK || status == __GCONV_EMPTY_INPUT) + && ((wchar_t *) data.__outbuf)[-1] == L'\0') + /* Don't count the NUL character in. */ + --result; + } + else + { + /* This code is based on the safe assumption that all internal + multi-byte encodings use the NUL byte only to mark the end + of the string. */ + data.__outbuf = (unsigned char *) dst; + data.__outbufend = data.__outbuf + len * sizeof (wchar_t); + + status = DL_CALL_FCT (fct, + (towc, &data, (const unsigned char **) src, srcend, + NULL, &dummy, 0, 1)); + + result = (wchar_t *) data.__outbuf - dst; + + /* We have to determine whether the last character converted + is the NUL character. */ + if ((status == __GCONV_OK || status == __GCONV_EMPTY_INPUT) + && (assert (result > 0), + ((wchar_t *) dst)[result - 1] == L'\0')) + { + assert (__mbsinit (data.__statep)); + *src = NULL; + --result; + } + } + + /* There must not be any problems with the conversion but illegal input + characters. */ + 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_FULL_OUTPUT + && status != __GCONV_EMPTY_INPUT && status != __GCONV_INCOMPLETE_INPUT) + { + result = (size_t) -1; + __set_errno (EILSEQ); + } + + return result; +} +weak_alias (__mbsnrtowcs, mbsnrtowcs) |