3 * Portions Copyright (c) 1990-1999 Nokia Corporation and/or its subsidiary(-ies).
7 /* No user fns here. Pesch 15apr92. */
10 * Copyright (c) 1990 The Regents of the University of California.
11 * All rights reserved.
13 * Redistribution and use in source and binary forms are permitted
14 * provided that the above copyright notice and this paragraph are
15 * duplicated in all such forms and that any documentation,
16 * advertising materials, and other materials related to such
17 * distribution and use acknowledge that the software was developed
18 * by the University of California, Berkeley. The name of the
19 * University may not be used to endorse or promote products derived
20 * from this software without specific prior written permission.
21 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
22 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
23 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
31 * Write the given character into the (probably full) buffer for
32 * the given file. Flush the buffer out if it is or becomes full,
33 * or if c=='\n' and the file is line buffered.
37 __swbuf (register int c,register FILE *fp)
41 /* Ensure stdio has been initialized. */
46 * In case we cannot write, or longjmp takes us out early,
47 * make sure _w is 0 (if fully- or un-buffered) or -_bf._size
48 * (if line buffered) so that we will get called again.
49 * If we did not do this, a sufficient number of putc()
50 * calls might wrap _w from negative to positive.
53 fp->_w = fp->_lbfsize;
56 c = (unsigned char) c;
59 * If it is completely full, flush it out. Then, in any case,
60 * stuff c into the buffer. If this causes the buffer to fill
61 * completely, or if c is '\n' and the file is line buffered,
62 * flush it (perhaps a second time). The second flush will always
63 * happen on unbuffered streams, where _bf._size==1; fflush()
64 * guarantees that putc() will always call wbuf() by setting _w
65 * to 0, so we need not do anything else.
68 n = fp->_p - fp->_bf._base;
69 if (n >= fp->_bf._size)
76 *fp->_p++ = (unsigned char)c;
77 if (++n == fp->_bf._size || (fp->_flags & __SLBF && c == '\n'))