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- /*
- * Copyright (c) 1989 The Regents of the University of California.
- * All rights reserved.
- *
- * This code is derived from software contributed to Berkeley by
- * Rick Macklem at The University of Guelph.
- *
- * 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.
- *
- * @(#)nfscompress.h 7.2 (Berkeley) 10/2/90
- */
-
- /*
- * Definitions for the compression algorithm
- */
- #define NFSC_MAX 17
- #define NFSCRL 0xe0
- #define NFSCRLE(a) (NFSCRL | ((a) - 2))
-
- #define nfscput(c) \
- if (oleft == 0) { \
- MGET(om, M_WAIT, MT_DATA); \
- if (clget) \
- MCLGET(om, M_WAIT); \
- om->m_len = 0; \
- oleft = M_TRAILINGSPACE(om) - 1; \
- *mp = om; \
- mp = &om->m_next; \
- op = mtod(om, u_char *); \
- } else \
- oleft--; \
- *op++ = (c); \
- om->m_len++; \
- olen++
-
- #define nfscget(c) \
- if (ileft == 0) { \
- do { \
- m = m->m_next; \
- } while (m && m->m_len == 0); \
- if (m) { \
- ileft = m->m_len - 1; \
- ip = mtod(m, u_char *); \
- (c) = *ip++; \
- } else { \
- (c) = '\0'; \
- noteof = 0; \
- } \
- } else { \
- (c) = *ip++; \
- ileft--; \
- }
-