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Diffstat (limited to 'REORG.TODO/stdlib/mbtowc.c')
-rw-r--r-- | REORG.TODO/stdlib/mbtowc.c | 72 |
1 files changed, 72 insertions, 0 deletions
diff --git a/REORG.TODO/stdlib/mbtowc.c b/REORG.TODO/stdlib/mbtowc.c new file mode 100644 index 0000000000..c391726689 --- /dev/null +++ b/REORG.TODO/stdlib/mbtowc.c @@ -0,0 +1,72 @@ +/* Copyright (C) 1991-2017 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + 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 <stdlib.h> +#include <string.h> +#include <wchar.h> +#include <gconv.h> +#include <wcsmbs/wcsmbsload.h> + + +/* Convert the multibyte character at S, which is no longer + than N characters, to its `wchar_t' representation, placing + this n *PWC and returning its length. + + Attention: this function should NEVER be intentionally used. + The interface is completely stupid. The state is shared between + all conversion functions. You should use instead the restartable + version `mbrtowc'. */ +int +mbtowc (wchar_t *pwc, const char *s, size_t n) +{ + int result; + static mbstate_t state; + + /* If S is NULL the function has to return null or not null + depending on the encoding having a state depending encoding or + not. */ + if (s == NULL) + { + const struct gconv_fcts *fcts; + + /* Get the conversion functions. */ + fcts = get_gconv_fcts (_NL_CURRENT_DATA (LC_CTYPE)); + + /* This is an extension in the Unix standard which does not directly + violate ISO C. */ + memset (&state, '\0', sizeof state); + + result = fcts->towc->__stateful; + } + else if (*s == '\0') + { + if (pwc != NULL) + *pwc = L'\0'; + result = 0; + } + else + { + result = __mbrtowc (pwc, s, n, &state); + + /* The `mbrtowc' functions tell us more than we need. Fold the -1 + and -2 result into -1. */ + if (result < 0) + result = -1; + } + + return result; +} |