From 28f540f45bbacd939bfd07f213bcad2bf730b1bf Mon Sep 17 00:00:00 2001 From: Roland McGrath Date: Sat, 18 Feb 1995 01:27:10 +0000 Subject: initial import --- stdlib/mbstowcs.c | 78 +++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 78 insertions(+) create mode 100644 stdlib/mbstowcs.c (limited to 'stdlib/mbstowcs.c') diff --git a/stdlib/mbstowcs.c b/stdlib/mbstowcs.c new file mode 100644 index 0000000000..38c710279a --- /dev/null +++ b/stdlib/mbstowcs.c @@ -0,0 +1,78 @@ +/* Copyright (C) 1991, 1992 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 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., 675 Mass Ave, +Cambridge, MA 02139, USA. */ + +#include +#include +#include +#include + + +extern int _mb_shift; /* Defined in mbtowc.c. */ + +/* Convert the string of multibyte characters in S to `wchar_t's in + PWCS, writing no more than N. Return the number written, + or (size_t) -1 if an invalid multibyte character is encountered. */ +size_t +DEFUN(mbstowcs, (pwcs, s, n), + register wchar_t *pwcs AND register CONST char *s AND register size_t n) +{ + int save_shift; + register size_t written = 0; + + /* Save the shift state. */ + save_shift = _mb_shift; + /* Reset the shift state. */ + _mb_shift = 0; + + while (*s != '\0') + { + int len; + if (isascii (*s)) + { + *pwcs = (wchar_t) *s; + len = 1; + } + else + len = mbtowc (pwcs, s, n); + + if (len < 1) + { + /* Return an error. */ + written = (size_t) -1; + break; + } + else + { + /* Multibyte character converted. */ + ++pwcs; + ++written; + s += len; + n -= len; + } + } + + /* Terminate the string if it has space. */ + if (n > 0) + *pwcs = (wchar_t) 0; + + /* Restore the old shift state. */ + _mb_shift = save_shift; + + /* Return how many we wrote (or maybe an error). */ + return written; +} -- cgit 1.4.1