2 * Copyright (c) 2004,2005 The DragonFly Project. All rights reserved.
4 * This code is derived from software contributed to The DragonFly Project
5 * by Matthew Dillon <dillon@backplane.com>
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in
15 * the documentation and/or other materials provided with the
17 * 3. Neither the name of The DragonFly Project nor the names of its
18 * contributors may be used to endorse or promote products derived
19 * from this software without specific, prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
22 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
23 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
24 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
25 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
26 * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
27 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
28 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
29 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
30 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
31 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * $DragonFly: src/sbin/jscan/jscan.h,v 1.2 2005/03/07 05:05:04 dillon Exp $
37 #include <sys/types.h>
39 #include <sys/journal.h>
50 enum jdirection { JF_FORWARDS, JF_BACKWARDS};
53 off_t jf_pos; /* current seek position */
54 off_t jf_setpt; /* saved seek position */
55 struct jdata *jf_saved; /* saved data */
57 enum jdirection jf_direction;
62 struct jdata *jd_next;
65 char jd_data[4]; /* must be last field */
69 struct jstream *js_next; /* linked list / same transaction */
70 int js_size; /* amount of data, in bytes */
74 struct jstream *js_cache;
76 char js_data[4]; /* variable length */
80 struct jhash *jh_hash;
81 struct jstream *jh_first;
82 struct jstream *jh_last;
86 #define JHASH_SIZE 1024
87 #define JHASH_MASK (JHASH_SIZE - 1)
89 const char *type_to_name(int16_t rectype);
90 void stringout(FILE *fp, char c, int exact);
92 struct jstream *jscan_stream(struct jfile *jf);
93 void jscan_dispose(struct jstream *js);
94 struct jfile *jopen_stream(const char *path, enum jdirection jdir);
95 struct jfile *jopen_fp(FILE *fp, enum jdirection jdir);
96 void jclose_stream(struct jfile *jf);
97 void jalign(struct jfile *jf);
98 int jread(struct jfile *jf, void *buf, int bytes);
99 void jset(struct jfile *jf);
100 void jreturn(struct jfile *jf);
101 void jflush(struct jfile *jf);
102 void jf_warn(struct jfile *jf, const char *ctl, ...);
104 void dump_debug(struct jfile *jf);
106 int jsreadany(struct jstream *js, off_t off, const void **bufp);
107 int jsreadp(struct jstream *js, off_t off, const void **bufp, int bytes);
108 int jsread(struct jstream *js, off_t off, void *buf, int bytes);