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

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/*
FUNCTION
<<_mblen_r>>---reentrant minimal multibyte length function
INDEX
_mblen_r
ANSI_SYNOPSIS
#include <stdlib.h>
int _mblen_r(struct _reent *<[r]>, const char *<[s]>, size_t <[n]>, int *<[state]>);
TRAD_SYNOPSIS
#include <stdlib.h>
int _mblen_r(<[r]>, <[s]>, <[n]>, <[state]>)
struct _reent *<[r]>;
const char *<[s]>;
size_t <[n]>;
int *<[state]>;
DESCRIPTION
When _MB_CAPABLE is not defined, this is a minimal ANSI-conforming
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implementation of <<_mblen_r>>. In this case, the
only ``multi-byte character sequences'' recognized are single bytes,
and thus <<1>> is returned unless <[s]> is the null pointer or
has a length of 0 or is the empty string.
When _MB_CAPABLE is defined, this routine calls <<_mbtowc_r>> to perform
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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 <<_mblen_r>> returns <<0>> if
<[s]> is <<NULL>> or the empty string; it returns <<1>> if not _MB_CAPABLE or
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the character is a single-byte character; it returns <<-1>>
if the multi-byte character is invalid; otherwise it returns
the number of bytes in the multibyte character.
PORTABILITY
<<_mblen>> is required in the ANSI C standard. However, the precise
effects vary with the locale.
<<_mblen_r>> requires no supporting OS subroutines.
*/
#include <newlib.h>
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#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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int
_DEFUN (_mblen_r, (r, s, n, state),
struct _reent *r _AND
const char *s _AND
size_t n _AND
* 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)
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{
#ifdef _MB_CAPABLE
int retval;
retval = _mbtowc_r (r, NULL, s, n, state);
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if (retval < 0)
{
state->__count = 0;
return -1;
}
return retval;
#else /* not _MB_CAPABLE */
if (s == NULL || *s == '\0')
return 0;
if (n == 0)
return -1;
return 1;
#endif /* not _MB_CAPABLE */
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}