2 * Copyright (c) 1995-1996, Index Data.
3 * See the file LICENSE for details.
4 * Sebastian Hammer, Adam Dickmeiss
7 * Revision 1.3 1996-11-01 13:35:03 adam
8 * New element, max_blocks_mem, that control how many blocks of max size
9 * to store in memory during isc_merge.
11 * Revision 1.2 1996/10/29 16:44:42 adam
12 * Added isc_type, isc_block macros.
14 * Revision 1.1 1996/10/29 13:40:37 adam
22 typedef struct ISAMC_s *ISAMC;
24 typedef struct ISAMC_PP_s *ISAMC_PP;
26 typedef struct ISAMC_filecat_s {
27 int bsize; /* block size */
28 int ifill; /* initial fill */
29 int mfill; /* minimum fill */
30 int mblocks; /* maximum blocks */
33 typedef struct ISAMC_M_s {
34 ISAMC_filecat filecat;
36 int (*compare_item)(const void *a, const void *b);
38 #define ISAMC_DECODE 0
39 #define ISAMC_ENCODE 1
40 void *(*code_start)(int mode);
41 void (*code_stop)(int mode, void *p);
42 void (*code_item)(int mode, void *p, char **dst, char **src);
48 typedef struct ISAMC_I_s {
49 int (*read_item)(void *clientData, char **dst, int *insertMode);
53 ISAMC_M isc_getmethod (void);
55 ISAMC isc_open (const char *name, int writeflag, ISAMC_M method);
56 int isc_close (ISAMC is);
57 ISAMC_P isc_merge (ISAMC is, ISAMC_P pos, ISAMC_I data);
59 ISAMC_PP isc_pp_open (ISAMC is, ISAMC_P pos);
60 void isc_pp_close (ISAMC_PP pp);
61 int isc_read_item (ISAMC_PP pp, char **dst);
62 int isc_read_key (ISAMC_PP pp, void *buf);
63 int isc_numkeys (ISAMC_PP pp);
65 #define isc_type(x) ((x) & 7)
66 #define isc_block(x) ((x) >> 3)