diff options
author | Jeff Johnston <jjohnstn@redhat.com> | 2008-12-11 02:43:12 +0300 |
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committer | Jeff Johnston <jjohnstn@redhat.com> | 2008-12-11 02:43:12 +0300 |
commit | 0751f22675083e9863d2abb58f5c4b4493224000 (patch) | |
tree | eff92cca8cdd64a30a484d0532c0e7df62b378dc /newlib/libc/stdio/fwide.c | |
parent | e1748ea15576fef7b6a52731ef6892bb1b61de79 (diff) |
2008-12-10 Corinna Vinschen <corinna@vinschen.de>
Implement basic wide char stdio functionality, based on FreeBSD.
* libc/include/stdio.h (__SORD): Define.
(__SWID): Define.
* libc/include/wchar.h: Add declarations for new wide char functions.
(getwc): Define as macro.
(getwchar): Ditto.
(putwc): Ditto.
(putwchar): Ditto.
* libc/include/sys/reent.h (struct __sFILE): Add _mbstate member.
(struct __sFILE64): Ditto.
* libc/stdio/Makefile.am (ELIX_4_SOURCES): Add fgetwc.c, fgetws.c,
fputwc.c, fputws.c, fwide.c, getwc.c, getwchar.c, putwc.c, putwchar.c
and ungetwc.c.
(CHEWOUT_FILES): Add fgetwc.def, fgetws.def, fputwc.def, fputws.def,
fwide.def, getwc.def, getwchar.def, putwc.def, putwchar.def and
ungetwc.def.
Add header dependency rules for the new files.
* libc/stdio/Makefile.in: Regenerate.
* libc/stdio/fgetwc.c: New file, implementing fgetwc and _fgetwc_r.
* libc/stdio/fgetws.c: New file, implementing fgetws and _fgetws_r.
* libc/stdio/findfp.c (std): Initialize FILE's _mbstate member.
(__sfmoreglue): Ditto.
* libc/stdio/fputs.c (_fputs_r): Set stream orientation.
* libc/stdio/fputwc.c: New file, implementing fputwc and _fputwc_r.
* libc/stdio/fputws.c: New file, implementing fputws and _fputws_r.
* libc/stdio/fread.c (_fread_r): Set stream orientation.
* libc/stdio/freopen.c (_freopen_r): Reset stream orientation. Reset
_mbstate.
* libc/stdio/fseek.c (_fseek_r): Reset _mbstate.
* libc/stdio/fwide.c: New file, implementing fwide and _fwide_r.
* libc/stdio/fwrite.c (_fwrite_r): Set stream orientation.
* libc/stdio/getwc.c: New file, implementing getwc and _getwc_r.
* libc/stdio/getwchar.c: New file, implementing getwchar and
_getwchar_r.
* libc/stdio/local.h (ORIENT): New macro.
* libc/stdio/puts.c (_puts_r): Set stream orientation.
* libc/stdio/putwc.c: New file, implementing putwc and _putwc_r.
* libc/stdio/putwchar.c: New file, implementing putwchar and
_putwchar_r.
* libc/stdio/refill.c (__srefill_r): Set stream orientation.
* libc/stdio/stdio.tex: Add documentation for new functions.
* libc/stdio/ungetc.c (_ungetc_r): Set stream orientation.
* libc/stdio/ungetwc.c: New file, implementing ungetwc and _ungetwc_r.
* libc/stdio/vfscanf.c (__SVFSCANF_R): Set stream orientation.
* libc/stdio/wbuf.c (__swbuf_r): Ditto.
Diffstat (limited to 'newlib/libc/stdio/fwide.c')
-rw-r--r-- | newlib/libc/stdio/fwide.c | 88 |
1 files changed, 88 insertions, 0 deletions
diff --git a/newlib/libc/stdio/fwide.c b/newlib/libc/stdio/fwide.c new file mode 100644 index 000000000..b81327ada --- /dev/null +++ b/newlib/libc/stdio/fwide.c @@ -0,0 +1,88 @@ +/* +FUNCTION +<<fwide>>---set and determine the orientation of a FILE stream + +INDEX + fwide +INDEX + _fwide_r + +ANSI_SYNOPSIS + #include <wchar.h> + int fwide(FILE *<[fp]>, int <[mode]>) + + int _fwide_r(struct _reent *<[ptr]>, FILE *<[fp]>, int <[mode]>) + +TRAD_SYNOPSIS + #include <wchar.h> + int fwide(<[fp]>, <[mode]>) + FILE *<[fp]>; + int <[mode]>; + + int fwide(<[ptr]>, <[fp]>, <[mode]>) + struct _reent *<[ptr]>; + FILE *<[fp]>; + int <[mode]>; + +DESCRIPTION +When <[mode]> is zero, the <<fwide>> function determines the current +orientation of <[fp]>. It returns a value > 0 if <[fp]> is +wide-character oriented, i.e. if wide character I/O is permitted but +char I/O is disallowed. It returns a value < 0 if <[fp]> is byte +oriented, i.e. if char I/O is permitted but wide character I/O is +disallowed. It returns zero if <[fp]> has no orientation yet; in +this case the next I/O operation might change the orientation (to byte +oriented if it is a char I/O operation, or to wide-character oriented +if it is a wide character I/O operation). + +Once a stream has an orientation, it cannot be changed and persists +until the stream is closed, unless the stream is re-opened with freopen, +which removes the orientation of the stream. + +When <[mode]> is non-zero, the <<fwide>> function first attempts to set +<[fp]>'s orientation (to wide-character oriented if <[mode]> > 0, or to +byte oriented if <[mode]> < 0). It then returns a value denoting the +current orientation, as above. + +RETURNS +The <<fwide>> function returns <[fp]>'s orientation, after possibly +changing it. A return value > 0 means wide-character oriented. A return +value < 0 means byte oriented. A return value of zero means undecided. + +PORTABILITY +C99, POSIX.1-2001. + +*/ + +#include <_ansi.h> +#include "local.h" + +int +_DEFUN(_fwide_r, (ptr, fp, mode), + struct _reent *ptr _AND + FILE *fp _AND + int mode) +{ + int ret; + + CHECK_INIT(ptr, fp); + + _flockfile (fp); + if (mode != 0) { + ORIENT (fp, mode); + } + if (!(fp->_flags & __SORD)) + ret = 0; + else + ret = (fp->_flags2 & __SWID) ? 1 : -1; + _funlockfile (fp); + return ret; +} + +int +_DEFUN(fwide, (fp, mode), + FILE *fp _AND + int mode) +{ + return _fwide_r (_REENT, fp, mode); +} |