/* Copyright (C) 1996, 1997, 1998, 1999, 2000 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 Library General Public License as published by the Free Software Foundation; either version 2 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 Library General Public License for more details. You should have received a copy of the GNU Library General Public License along with the GNU C Library; see the file COPYING.LIB. If not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ #include <dlfcn.h> #include <errno.h> #include <gconv.h> #include <wchar.h> #include <wcsmbsload.h> #include <assert.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) { mbstate_t temp_state; wchar_t buf[1]; struct __gconv_step_data data; int status; size_t result; size_t dummy; const unsigned char *inbuf; char *outbuf = (char *) (pwc ?: buf); /* Set information for this step. */ data.__invocation_counter = 0; data.__internal_use = 1; data.__flags = __GCONV_IS_LAST; data.__statep = ps ?: &state; data.__trans = NULL; /* A first special case is if S is NULL. This means put PS in the initial state. */ if (s == NULL) { outbuf = (char *) buf; s = ""; n = 1; temp_state = *data.__statep; data.__statep = &temp_state; } /* Tell where we want the result. */ data.__outbuf = outbuf; data.__outbufend = outbuf + sizeof (wchar_t); /* Make sure we use the correct function. */ update_conversion_ptrs (); /* Do a normal conversion. */ inbuf = (const unsigned char *) s; status = DL_CALL_FCT (__wcsmbs_gconv_fcts.towc->__fct, (__wcsmbs_gconv_fcts.towc, &data, &inbuf, inbuf + n, 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 { result = (size_t) -1; __set_errno (EILSEQ); } return result; } weak_alias (__mbrtowc, mbrtowc)