projects / unix-history / blame
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|---|---|---|
| 5132edc7 AF |
1 | /* |
| 2 | * Copyright (c) 1992 OMRON Corporation. | |
| ad787160 C |
3 | * Copyright (c) 1992, 1993 |
| 4 | * The Regents of the University of California. All rights reserved. | |
| 5132edc7 AF |
5 | * |
| 6 | * This code is derived from software contributed to Berkeley by | |
| 7 | * OMRON Corporation. | |
| 8 | * | |
| c0567266 KB |
9 | * Redistribution and use in source and binary forms, with or without |
| 10 | * modification, are permitted provided that the following conditions | |
| 11 | * are met: | |
| 12 | * 1. Redistributions of source code must retain the above copyright | |
| 13 | * notice, this list of conditions and the following disclaimer. | |
| 14 | * 2. Redistributions in binary form must reproduce the above copyright | |
| 15 | * notice, this list of conditions and the following disclaimer in the | |
| 16 | * documentation and/or other materials provided with the distribution. | |
| 17 | * 3. All advertising materials mentioning features or use of this software | |
| 18 | * must display the following acknowledgement: | |
| 19 | * This product includes software developed by the University of | |
| 20 | * California, Berkeley and its contributors. | |
| 21 | * 4. Neither the name of the University nor the names of its contributors | |
| 22 | * may be used to endorse or promote products derived from this software | |
| 23 | * without specific prior written permission. | |
| 24 | * | |
| 25 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND | |
| 26 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
| 27 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
| 28 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
| 29 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
| 30 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
| 31 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
| 32 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
| 33 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
| 34 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
| 35 | * SUCH DAMAGE. | |
| ad787160 C |
36 | * |
| 37 | * @(#)rcvbuf.h 8.1 (Berkeley) 6/10/93 | |
| 5132edc7 AF |
38 | */ |
| 39 | ||
| 40 | /* | |
| 41 | * rcvbuf.h -- receive buffer control structure definition | |
| 42 | * by A.Fujita, Dec-12-1992 | |
| 43 | */ | |
| 44 | ||
| 45 | #define RBUF_SIZE 128 | |
| 46 | ||
| 47 | struct rcvbuf { | |
| 48 | u_char *rb_push; | |
| 49 | u_char *rb_pop; | |
| 50 | u_char rb_buf[RBUF_SIZE+4]; | |
| 51 | }; | |
| 52 | ||
| 53 | #define RBUF_INIT(n) rcvbuf[n].rb_pop = rcvbuf[n].rb_push = &rcvbuf[n].rb_buf[RBUF_SIZE] | |
| 54 | ||
| 55 | #define PUSH_RBUF(n, c) *(--rcvbuf[n].rb_push) = c ; \ | |
| 56 | if (rcvbuf[n].rb_push == rcvbuf[n].rb_buf) \ | |
| 57 | rcvbuf[n].rb_push = &rcvbuf[n].rb_buf[RBUF_SIZE] | |
| 58 | ||
| 59 | #define POP_RBUF(n, c) c= *(--rcvbuf[n].rb_pop); \ | |
| 60 | if (rcvbuf[n].rb_pop == rcvbuf[n].rb_buf) \ | |
| 61 | rcvbuf[n].rb_pop = &rcvbuf[n].rb_buf[RBUF_SIZE] | |
| 62 | ||
| 63 | #define RBUF_EMPTY(n) (rcvbuf[n].rb_push == rcvbuf[n].rb_pop ? 1: 0) |