1 |
|
/* |
2 |
|
* DotGNU Execution Environment Core |
3 |
|
* (c)2003 netFluid Technology Ltd - http://www.nfluid.com |
4 |
|
* |
5 |
|
* Database Object Encapsulation |
6 |
|
* |
7 |
|
* This program is free software; you can redistribute it and/or modify |
8 |
|
* it under the terms of the GNU General Public License as published by |
9 |
|
* the Free Software Foundation; either version 2 of the License, or |
10 |
|
* (at your option) any later version. |
11 |
|
* |
12 |
|
* This program is distributed in the hope that it will be useful, |
13 |
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of |
14 |
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
15 |
|
* GNU General Public License for more details. |
16 |
|
* |
17 |
|
* You should have received a copy of the GNU General Public License |
18 |
|
* along with this program; if not, write to the Free Software |
19 |
|
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA |
20 |
|
* |
21 |
|
* $Revision$ $Date$ |
22 |
|
* |
23 |
|
* -------------------------------------------------------------------------- |
24 |
|
*/ |
25 |
|
#ifndef DG_DBOBJ_H |
26 |
|
#define DG_DBOBJ_H |
27 |
|
|
28 |
|
#include <stddef.h> |
29 |
|
#include "dgDbError.h" |
30 |
|
|
31 |
|
typedef enum { |
32 |
|
DBF_CHAR = 1, |
33 |
|
DBF_INT = 2, |
34 |
|
DBF_LONG = 3, |
35 |
|
} fieldType; |
36 |
|
|
37 |
|
typedef struct { |
38 |
|
const char *property; |
39 |
|
off_t offset; |
40 |
|
fieldType type; |
41 |
|
size_t size; |
42 |
|
} dbProperty; |
43 |
|
|
44 |
|
typedef struct { |
45 |
|
int newobj; |
46 |
|
int dirty; |
47 |
|
int delInd; /* Set when object is effectively deleted */ |
48 |
|
|
49 |
|
size_t keyOffset; |
50 |
|
size_t keySize; |
51 |
|
size_t dataOffset; |
52 |
|
size_t dataSize; |
53 |
|
size_t objSize; |
54 |
|
dbProperty *keyProperties; |
55 |
|
dbProperty *dataProperties; |
56 |
|
char *tableName; |
57 |
|
int uniqueKey; |
58 |
|
char **dbh; |
59 |
|
|
60 |
|
} dbObjPrivate; |
61 |
|
|
62 |
|
struct _dbobj; |
63 |
|
|
64 |
|
typedef struct { |
65 |
|
int (*Load)( struct _dbobj *this ); |
66 |
|
int (*Save)( struct _dbobj *this ); |
67 |
|
int (*Set)( struct _dbobj *this, char *p, char *d ); |
68 |
|
char * (*Get)( struct _dbobj *this, char *p ); |
69 |
|
int (*Delete)( struct _dbobj *this ); |
70 |
|
int (*Compare)( struct _dbobj *this, struct _dbobj *that ); |
71 |
|
int (*CompareKey)( struct _dbobj *this, struct _dbobj *that ); |
72 |
|
int (*CopyFrom)( struct _dbobj *this, struct _dbobj *that ); |
73 |
|
|
74 |
|
void (*Destroy)( struct _dbobj **this ); /* Release an object */ |
75 |
|
|
76 |
|
int (*connect)(); |
77 |
|
} dbObjMethods; |
78 |
|
|
79 |
|
typedef struct _dbobj { |
80 |
|
dbObjMethods method; |
81 |
|
dbObjPrivate private; |
82 |
|
} dbObject; |
83 |
|
|
84 |
|
#define KEY_IS_UNIQUE 1 |
85 |
|
#define KEY_IS_NOT_UNIQUE 0 |
86 |
|
|
87 |
|
/* This structure describes the object for dbengine. |
88 |
|
* Info is pulled out of here and held in dbObjMehtods and dbObjPrivate |
89 |
|
*/ |
90 |
|
typedef struct { |
91 |
|
size_t keySize; |
92 |
|
size_t dataSize; |
93 |
|
size_t objSize; |
94 |
|
char *tableName; |
95 |
|
int keyIsUnique; |
96 |
|
char **dbh; |
97 |
|
dbProperty *keyProperties; |
98 |
|
dbProperty *dataProperties; |
99 |
|
} dbObjDesc; |
100 |
|
|
101 |
|
dbObject * db_newObject( dbObjDesc *def ); |
102 |
|
void db_destroy( dbObject **this_p ); |
103 |
|
int db_setProperty( dbObject *this, char *property, char *data ); |
104 |
|
void db_configure( char *dbroot ); |
105 |
|
|
106 |
|
/* Helper methods */ |
107 |
|
#define setProperty(a,b,c) (a)->method.Set( (dbObject*)(a), b, c ) |
108 |
|
#define getProperty(a,b) (a)->method.Get( (dbObject*)(a), b ) |
109 |
|
|
110 |
|
#define loadObject(a) (a)->method.Load( (dbObject*)(a) ) |
111 |
|
#define saveObject(a) (a)->method.Save( (dbObject*)(a) ) |
112 |
|
#define deleteObject(a) (a)->method.Delete( (dbObject*)(a) ) |
113 |
|
#define destroyObject(a) (a)->method.Destroy( (dbObject**)&(a) ) |
114 |
|
#define compareObjectKey(a,b) (a)->method.CompareKey( (dbObject*)(a), (dbObject*)(b) ) |
115 |
|
|
116 |
|
/* ------------------------------------------------------------------------- */ |
117 |
|
#endif |