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f777e3a5ac
* configure.in: Define _MB_CAPABLE if mb supported.
* configure: Regenerated.
* configure.host: Remove manual setting of MB_CAPABLE compiler
flag.
* newlib.hin: Add _MB_CAPABLE flag.
* libc/ctype/iswalpha.c, libc/ctype/iswblank.c: Include <newlib.h>
and check for _MB_CAPABLE flag instead of MB_CAPABLE.
* libc/ctype/iswcntrl.c, libc/ctype/iswprint.c: Ditto.
* libc/ctype/iswpunct.c, libc/ctype/iswspace.c: Ditto.
* libc/ctype/jp2uc.c: Ditto.
* libc/ctype/towlower.c, libc/ctype/towupper.c: Ditto.
* libc/locale/locale.c: Ditto
* libc/machine/powerpc/vfscanf.c: Ditto
* libc/stdio/vfprintf.c, libc/stdio/vfscanf.c: Ditto
* libc/stdlib/mblen.c: Ditto
* libc/stdlib/mblen_r.c, libc/stdlib/mbrlen.c: Ditto
* libc/stdlib/mbrtowc.c, libc/stdlib/mbsrtowcs.c: Ditto
* libc/stdlib/mbstowcs.c, libc/stdlib/mbtowc.c: Ditto
* libc/stdlib/mbtowc_r.c, libc/stdlib/wcrtomb.c: Ditto
* libc/stdlib/wcsrtombs.c, libc/stdlib/wcstombs.c: Ditto
* libc/stdlib/wctomb.c, libc/sys/linux/intl/dcigettext.c: Ditto
* libc/sys/linux/intl/explodename.c: Ditto
* libc/sys/linux/intl/finddomain.c: Ditto
* libc/sys/linux/intl/l10nflist.c: Ditto
* libc/sys/linux/intl/loadmsgcat.c: Ditto
* libc/sys/linux/intl/localealias.c: Ditto
95 lines
2.3 KiB
C
95 lines
2.3 KiB
C
/*
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FUNCTION
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<<mbtowc>>---minimal multibyte to wide char converter
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INDEX
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mbtowc
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ANSI_SYNOPSIS
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#include <stdlib.h>
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int mbtowc(wchar_t *<[pwc]>, const char *<[s]>, size_t <[n]>);
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TRAD_SYNOPSIS
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#include <stdlib.h>
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int mbtowc(<[pwc]>, <[s]>, <[n]>)
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wchar_t *<[pwc]>;
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const char *<[s]>;
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size_t <[n]>;
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DESCRIPTION
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When _MB_CAPABLE is not defined, this is a minimal ANSI-conforming
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implementation of <<mbtowc>>. In this case,
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only ``multi-byte character sequences'' recognized are single bytes,
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and they are ``converted'' to themselves.
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Each call to <<mbtowc>> copies one character from <<*<[s]>>> to
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<<*<[pwc]>>>, unless <[s]> is a null pointer. The argument n
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is ignored.
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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
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decoding. The result is based on the locale setting which may
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be restricted to a defined set of locales.
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RETURNS
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This implementation of <<mbtowc>> returns <<0>> if
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<[s]> is <<NULL>> or is the empty string;
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it returns <<1>> if not _MB_CAPABLE or
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the character is a single-byte character; it returns <<-1>>
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if n is <<0>> or the multi-byte character is invalid;
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otherwise it returns the number of bytes in the multibyte character.
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If the return value is -1, no changes are made to the <<pwc>>
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output string. If the input is the empty string, a wchar_t nul
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is placed in the output string and 0 is returned. If the input
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has a length of 0, no changes are made to the <<pwc>> output string.
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PORTABILITY
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<<mbtowc>> is required in the ANSI C standard. However, the precise
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effects vary with the locale.
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<<mbtowc>> requires no supporting OS subroutines.
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*/
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#ifndef _REENT_ONLY
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#include <newlib.h>
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#include <stdlib.h>
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#include <wchar.h>
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int
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_DEFUN (mbtowc, (pwc, s, n),
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wchar_t *pwc _AND
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const char *s _AND
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size_t n)
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{
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#ifdef _MB_CAPABLE
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int retval = 0;
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mbstate_t *ps;
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_REENT_CHECK_MISC(_REENT);
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ps = &(_REENT_MBTOWC_STATE(_REENT));
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retval = _mbtowc_r (_REENT, pwc, s, n, ps);
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if (retval < 0)
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{
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ps->__count = 0;
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return -1;
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}
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return retval;
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#else /* not _MB_CAPABLE */
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if (s == NULL)
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return 0;
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if (n == 0)
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return -1;
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if (pwc)
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*pwc = (wchar_t) *s;
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return (*s != '\0');
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#endif /* not _MB_CAPABLE */
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}
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#endif /* !_REENT_ONLY */
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