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stdio: split byte- and wide-char-oriented low-level output functions
Introduce function __swbufw_r and macros/inline-functions called __swputc_r. Call these functions/macros exclusively from wide-char functions. This allows to set and test the stream orientation correctly even if output is only performed using byte-oriented macros from stdio.h. Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
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/* | ||
* Copyright (c) 1990 The Regents of the University of California. | ||
* All rights reserved. | ||
* | ||
* Redistribution and use in source and binary forms are permitted | ||
* provided that the above copyright notice and this paragraph are | ||
* duplicated in all such forms and that any documentation, | ||
* and/or other materials related to such | ||
* distribution and use acknowledge that the software was developed | ||
* by the University of California, Berkeley. The name of the | ||
* University may not be used to endorse or promote products derived | ||
* from this software without specific prior written permission. | ||
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR | ||
* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED | ||
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. | ||
*/ | ||
/* No user fns here. Pesch 15apr92. */ | ||
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#if defined(LIBC_SCCS) && !defined(lint) | ||
static char sccsid[] = "%W% (Berkeley) %G%"; | ||
#endif /* LIBC_SCCS and not lint */ | ||
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#include <_ansi.h> | ||
#include <stdio.h> | ||
#include <errno.h> | ||
#include "local.h" | ||
#include "fvwrite.h" | ||
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/* | ||
* Note that this is the same function as __swbuf_r, just to be called | ||
* from wide-char functions! | ||
* | ||
* The only difference is that we set and test the orientation differently. | ||
*/ | ||
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int | ||
__swbufw_r (struct _reent *ptr, | ||
register int c, | ||
register FILE *fp) | ||
{ | ||
register int n; | ||
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CHECK_INIT (ptr, fp); | ||
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fp->_w = fp->_lbfsize; | ||
if (cantwrite (ptr, fp)) | ||
return EOF; | ||
c = (unsigned char) c; | ||
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if (ORIENT (fp, 1) != 1) | ||
return EOF; | ||
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n = fp->_p - fp->_bf._base; | ||
if (n >= fp->_bf._size) | ||
{ | ||
if (_fflush_r (ptr, fp)) | ||
return EOF; | ||
n = 0; | ||
} | ||
fp->_w--; | ||
*fp->_p++ = c; | ||
if (++n == fp->_bf._size || (fp->_flags & __SLBF && c == '\n')) | ||
if (_fflush_r (ptr, fp)) | ||
return EOF; | ||
return c; | ||
} |