newlib-cygwin/newlib/libc/stdlib/mbstowcs.c

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/*
FUNCTION
<<mbstowcs>>---minimal multibyte string to wide char converter
INDEX
mbstowcs
ANSI_SYNOPSIS
#include <stdlib.h>
int mbstowcs(wchar_t *<[pwc]>, const char *<[s]>, size_t <[n]>);
TRAD_SYNOPSIS
#include <stdlib.h>
int mbstowcs(<[pwc]>, <[s]>, <[n]>)
wchar_t *<[pwc]>;
const char *<[s]>;
size_t <[n]>;
DESCRIPTION
When MB_CAPABLE is not defined, this is a minimal ANSI-conforming
implementation of <<mbstowcs>>. In this case, the
only ``multi-byte character sequences'' recognized are single bytes,
and they are ``converted'' to wide-char versions simply by byte
extension.
When MB_CAPABLE is defined, this routine calls <<_mbstowcs_r>> to perform
the conversion, passing a state variable to allow state dependent
decoding. The result is based on the locale setting which may
be restricted to a defined set of locales.
RETURNS
This implementation of <<mbstowcs>> returns <<0>> if
<[s]> is <<NULL>> or is the empty string;
it returns <<-1>> if MB_CAPABLE and one of the
multi-byte characters is invalid or incomplete;
otherwise it returns the minimum of: <<n>> or the
number of multi-byte characters in <<s>> plus 1 (to
compensate for the nul character).
If the return value is -1, the state of the <<pwc>> string is
indeterminate. If the input has a length of 0, the output
string will be modified to contain a wchar_t nul terminator.
PORTABILITY
<<mbstowcs>> is required in the ANSI C standard. However, the precise
effects vary with the locale.
<<mbstowcs>> requires no supporting OS subroutines.
*/
#ifndef _REENT_ONLY
#include <stdlib.h>
* libc/include/langinfo.h: New file. * libc/include/wchar.h: Likewise. * libc/include/sys/syslimits.h: Likewise. * libc/locale/fix_grouping.c: Likewise. * libc/locale/ldpart.c: Likewise. * libc/locale/ldpart.h: Likewise. * libc/locale/lmessages.c: Likewise. * libc/locale/lmessages.h: Likewise. * libc/locale/lmonetary.c: Likewise. * libc/locale/lmonetary.h: Likewise. * libc/locale/lnumeric.c: Likewise. * libc/locale/lnumeric.h: Likewise. * libc/locale/nl_langinfo.3: Likewise. * libc/locale/nl_langinfo.c: Likewise. * libc/locale/timelocal.c: Likewise. * libc/locale/timelocal.h: Likewise. * libc/stdlib/btowc.c: Likewise. * libc/stdlib/mbrlen.c: Likewise. * libc/stdlib/mbrtowc.c: Likewise. * libc/stdlib/mbsinit.c: Likewise. * libc/stdlib/mbsrtowcs.c: Likewise. * libc/stdlib/wcrtomb.c: Likewise. * libc/stdlib/wcsrtombs.c: Likewise. * libc/stdlib/wctob.c: Likewise. * libc/sys/linux/prof-freq.c: Likewise. * libc/sys/linux/profile.c: Likewise. * libc/sys/linux/machine/i386/dl-procinfo.c: Likewise. * libc/sys/linux/machine/i386/dl-procinfo.h: Likewise. * libc/include/stdlib.h: Change re-entrant functions to take mbstate_t pointers. * libc/include/sys/_types.h: Define _mbstate_t. * libc/include/sys/config.h (MB_LEN_MAX): New macro. * libc/include/sys/errno.h (EILSEQ): New error code. * libc/include/sys/reent.h: Include wchar.h. Change reentrant structure to use mbstate_t. * libc/locale/Makefile.am (LIB_SOURCES): Add new files. * libc/machine/powerpc/vfprintf.c: Use mbstate_t. * libc/machine/powerpc/vfscanf.c: Likewise. * libc/stdio/getdelim.c: Reallocate buffer only when necessary. * libc/stdio/vfprintf.c: Likewise. * libc/stdio/vfscanf.c: Likewise. * libc/stdlib/Makefile.am (LIB_SOURCES): Add new files. * libc/stdlib/mblen.c: Use mbstate_t. * libc/stdlib/mblen_r.c: Likewise. * libc/stdlib/mbstowcs.c: Likewise. * libc/stdlib/mbstowcs_r.c: Likewise. * libc/stdlib/mbtowc.c: Likewise. * libc/stdlib/mbtowc_r.c: Likewise. * libc/stdlib/wcstombs.c: Likewise. * libc/stdlib/wcstombs_r.c: Likewise. * libc/stdlib/wctomb_r.c: Likewise. * libc/sys/linux/Makefile.am (LIB_SOURCES): Add prof-freq.c and profile.c. * libc/sys/linux/machine/i386/Makefile.am (LIB_SOURCES): Add dl-procinfo.c. * libc/sys/linux/sys/errno.h (EILSEQ): New error code. * libc/sys/linux/sys/types.h (off_t): Define type. * testsuite/newlib.locale/UTF-8.c: Change locale name from UTF-8 to C-UTF-8. * testsuite/newlib.locale/UTF-8.exp: Likewise.
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#include <wchar.h>
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size_t
_DEFUN (mbstowcs, (pwcs, s, n),
wchar_t *pwcs _AND
const char *s _AND
size_t n)
{
#ifdef MB_CAPABLE
* libc/include/langinfo.h: New file. * libc/include/wchar.h: Likewise. * libc/include/sys/syslimits.h: Likewise. * libc/locale/fix_grouping.c: Likewise. * libc/locale/ldpart.c: Likewise. * libc/locale/ldpart.h: Likewise. * libc/locale/lmessages.c: Likewise. * libc/locale/lmessages.h: Likewise. * libc/locale/lmonetary.c: Likewise. * libc/locale/lmonetary.h: Likewise. * libc/locale/lnumeric.c: Likewise. * libc/locale/lnumeric.h: Likewise. * libc/locale/nl_langinfo.3: Likewise. * libc/locale/nl_langinfo.c: Likewise. * libc/locale/timelocal.c: Likewise. * libc/locale/timelocal.h: Likewise. * libc/stdlib/btowc.c: Likewise. * libc/stdlib/mbrlen.c: Likewise. * libc/stdlib/mbrtowc.c: Likewise. * libc/stdlib/mbsinit.c: Likewise. * libc/stdlib/mbsrtowcs.c: Likewise. * libc/stdlib/wcrtomb.c: Likewise. * libc/stdlib/wcsrtombs.c: Likewise. * libc/stdlib/wctob.c: Likewise. * libc/sys/linux/prof-freq.c: Likewise. * libc/sys/linux/profile.c: Likewise. * libc/sys/linux/machine/i386/dl-procinfo.c: Likewise. * libc/sys/linux/machine/i386/dl-procinfo.h: Likewise. * libc/include/stdlib.h: Change re-entrant functions to take mbstate_t pointers. * libc/include/sys/_types.h: Define _mbstate_t. * libc/include/sys/config.h (MB_LEN_MAX): New macro. * libc/include/sys/errno.h (EILSEQ): New error code. * libc/include/sys/reent.h: Include wchar.h. Change reentrant structure to use mbstate_t. * libc/locale/Makefile.am (LIB_SOURCES): Add new files. * libc/machine/powerpc/vfprintf.c: Use mbstate_t. * libc/machine/powerpc/vfscanf.c: Likewise. * libc/stdio/getdelim.c: Reallocate buffer only when necessary. * libc/stdio/vfprintf.c: Likewise. * libc/stdio/vfscanf.c: Likewise. * libc/stdlib/Makefile.am (LIB_SOURCES): Add new files. * libc/stdlib/mblen.c: Use mbstate_t. * libc/stdlib/mblen_r.c: Likewise. * libc/stdlib/mbstowcs.c: Likewise. * libc/stdlib/mbstowcs_r.c: Likewise. * libc/stdlib/mbtowc.c: Likewise. * libc/stdlib/mbtowc_r.c: Likewise. * libc/stdlib/wcstombs.c: Likewise. * libc/stdlib/wcstombs_r.c: Likewise. * libc/stdlib/wctomb_r.c: Likewise. * libc/sys/linux/Makefile.am (LIB_SOURCES): Add prof-freq.c and profile.c. * libc/sys/linux/machine/i386/Makefile.am (LIB_SOURCES): Add dl-procinfo.c. * libc/sys/linux/sys/errno.h (EILSEQ): New error code. * libc/sys/linux/sys/types.h (off_t): Define type. * testsuite/newlib.locale/UTF-8.c: Change locale name from UTF-8 to C-UTF-8. * testsuite/newlib.locale/UTF-8.exp: Likewise.
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mbstate_t state;
state.__count = 0;
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return _mbstowcs_r (_REENT, pwcs, s, n, &state);
#else /* not MB_CAPABLE */
int count = 0;
if (n != 0) {
do {
if ((*pwcs++ = (wchar_t) *s++) == 0)
break;
count++;
} while (--n != 0);
}
return count;
#endif /* not MB_CAPABLE */
}
#endif /* !_REENT_ONLY */