2 * Copyright (C) 1994-1997, Index Data I/S
4 * Sebastian Hammer, Adam Dickmeiss
7 * Revision 1.14 1997-09-05 15:29:58 adam
8 * Changed prototype for chr_map_input - added const.
9 * Added support for C++, headers uses extern "C" for public definitions.
11 * Revision 1.13 1996/10/29 13:43:07 adam
12 * Added a few comments.
14 * Revision 1.12 1996/03/26 16:00:44 adam
15 * The directory of the shadow table can be specified by the new
18 * Revision 1.11 1995/12/08 16:20:39 adam
19 * New commit utilities - used for 'save' update.
21 * Revision 1.10 1995/12/01 16:24:33 adam
22 * Commit files use separate meta file area.
24 * Revision 1.9 1995/12/01 11:37:46 adam
25 * Cached/commit files implemented as meta-files.
27 * Revision 1.8 1995/11/30 08:33:29 adam
28 * Started work on commit facility.
30 * Revision 1.7 1995/09/04 12:33:35 adam
31 * Various cleanup. YAZ util used instead.
33 * Revision 1.6 1994/09/14 13:10:35 quinn
36 * Revision 1.5 1994/08/24 08:45:52 quinn
39 * Revision 1.4 1994/08/17 15:38:28 adam
42 * Revision 1.3 1994/08/17 14:09:47 quinn
56 #define bf_blocksize(bf) mf_blocksize(bf->mf)
58 typedef struct BFile_struct
61 struct CFile_struct *cf;
62 } *BFile, BFile_struct;
64 /* bf_close: closes bfile.
65 returns 0 if successful; non-zero otherwise
69 /* bf_open: opens bfile.
70 opens bfile with name 'name' and with 'block_size' as block size.
71 returns bfile handle is successful; NULL otherwise
73 BFile bf_open (const char *name, int block_size, int wflag);
75 /* bf_read: reads bytes from bfile 'bf'.
76 reads 'num' bytes (or whole block if 0) from offset 'offset' from
77 block 'no'. stores contents in buffer 'buf'.
78 returns 1 if whole block could be read; 0 otherwise.
80 int bf_read (BFile bf, int no, int offset, int num, void *buf);
82 /* bf_write: writes bytes to bfile 'bf'.
83 writes 'num' bytes (or whole block if 0) at offset 'offset' to
84 block 'no'. retrieves contents from buffer 'buf'.
85 returns 0 if successful; non-zero otherwise.
87 int bf_write (BFile bf, int no, int offset, int num, const void *buf);
89 /* bf_cache: enables/disables bfile cache */
90 void bf_cache (int enableFlag);
92 /* bf_lockDir: specifies locking directory for the cache system */
93 void bf_lockDir (const char *lockDir);
95 /* bf_commitExists: returns 1 if commit is pending; 0 otherwise */
96 int bf_commitExists (void);
98 /* bf_commitExec: executes commit */
99 void bf_commitExec (void);
101 /* bf_commitClean: cleans commit files, etc */
102 void bf_commitClean (void);