diff options
Diffstat (limited to 'usr.bin/window/ttoutput.c')
-rw-r--r-- | usr.bin/window/ttoutput.c | 146 |
1 files changed, 146 insertions, 0 deletions
diff --git a/usr.bin/window/ttoutput.c b/usr.bin/window/ttoutput.c new file mode 100644 index 0000000..5c582d6 --- /dev/null +++ b/usr.bin/window/ttoutput.c @@ -0,0 +1,146 @@ +/* + * Copyright (c) 1983, 1993 + * The Regents of the University of California. All rights reserved. + * + * This code is derived from software contributed to Berkeley by + * Edward Wang at The University of California, Berkeley. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Berkeley and its contributors. + * 4. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#ifndef lint +static char sccsid[] = "@(#)ttoutput.c 8.1 (Berkeley) 6/6/93"; +#endif /* not lint */ + +#include "ww.h" +#include "tt.h" +#include <sys/errno.h> + +/* + * Buffered output package. + * We need this because stdio fails on non-blocking writes. + */ + +ttflush() +{ + register char *p; + register n = tt_obp - tt_ob; + extern errno; + + if (n == 0) + return; + if (tt.tt_checksum) + (*tt.tt_checksum)(tt_ob, n); + if (tt.tt_flush) { + (*tt.tt_flush)(); + return; + } + wwnflush++; + for (p = tt_ob; p < tt_obp;) { + wwnwr++; + n = write(1, p, tt_obp - p); + if (n < 0) { + wwnwre++; + if (errno != EWOULDBLOCK) { + /* can't deal with this */ + p = tt_obp; + } + } else if (n == 0) { + /* what to do? */ + wwnwrz++; + } else { + wwnwrc += n; + p += n; + } + } + tt_obp = tt_ob; +} + +ttputs(s) +register char *s; +{ + while (*s) + ttputc(*s++); +} + +ttwrite(s, n) + register char *s; + register n; +{ + switch (n) { + case 0: + break; + case 1: + ttputc(*s); + break; + case 2: + if (tt_obe - tt_obp < 2) + ttflush(); + *tt_obp++ = *s++; + *tt_obp++ = *s; + break; + case 3: + if (tt_obe - tt_obp < 3) + ttflush(); + *tt_obp++ = *s++; + *tt_obp++ = *s++; + *tt_obp++ = *s; + break; + case 4: + if (tt_obe - tt_obp < 4) + ttflush(); + *tt_obp++ = *s++; + *tt_obp++ = *s++; + *tt_obp++ = *s++; + *tt_obp++ = *s; + break; + case 5: + if (tt_obe - tt_obp < 5) + ttflush(); + *tt_obp++ = *s++; + *tt_obp++ = *s++; + *tt_obp++ = *s++; + *tt_obp++ = *s++; + *tt_obp++ = *s; + break; + default: + while (n > 0) { + register m; + + while ((m = tt_obe - tt_obp) == 0) + ttflush(); + if ((m = tt_obe - tt_obp) > n) + m = n; + bcopy(s, tt_obp, m); + tt_obp += m; + s += m; + n -= m; + } + } +} |