1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
|
/* header-file for dbf.c
declares routines for reading and writing xBase-files (.dbf), and
associated structures
Maarten Boekhold (maarten.boekhold@reuters.com) 29 oktober 1995
*/
#ifndef _DBF_H
#define _DBF_H
#include <sys/types.h>
/**********************************************************************
The DBF-part
***********************************************************************/
#define DBF_FILE_MODE 0644
/* byte offsets for date in dbh_date */
#define DBH_DATE_YEAR 0
#define DBH_DATE_MONTH 1
#define DBH_DATE_DAY 2
/* maximum fieldname-length */
#define DBF_NAMELEN 11
/* magic-cookies for the file */
#define DBH_NORMAL 0x03
#define DBH_MEMO 0x83
/* magic-cookies for the fields */
#define DBF_ERROR -1
#define DBF_VALID 0x20
#define DBF_DELETED 0x2A
/* diskheader */
typedef struct
{
u_char dbh_dbt; /* indentification field */
u_char dbh_year; /* last modification-date */
u_char dbh_month;
u_char dbh_day;
u_char dbh_records[4]; /* number of records */
u_char dbh_hlen[2]; /* length of this header */
u_char dbh_rlen[2]; /* length of a record */
u_char dbh_stub[20]; /* misc stuff we don't need */
} dbf_header;
/* disk field-description */
typedef struct
{
u_char dbf_name[DBF_NAMELEN]; /* field-name terminated with \0 */
u_char dbf_type; /* field-type */
u_char dbf_reserved[4]; /* some reserved stuff */
u_char dbf_flen; /* field-length */
u_char dbf_dec; /* number of decimal positions if type is
* 'N' */
u_char dbf_stub[14]; /* stuff we don't need */
} dbf_field;
/* memory field-description */
typedef struct
{
u_char db_name[DBF_NAMELEN]; /* field-name terminated with \0 */
u_char db_type; /* field-type */
u_char db_flen; /* field-length */
u_char db_dec; /* number of decimal positions */
} f_descr;
/* memory dfb-header */
typedef struct
{
int db_fd; /* file-descriptor */
u_long db_offset; /* current offset in file */
u_char db_memo; /* memo-file present */
u_char db_year; /* last update as YYMMDD */
u_char db_month;
u_char db_day;
u_long db_hlen; /* length of the diskheader, for
* calculating the offsets */
u_long db_records; /* number of records */
u_long db_currec; /* current record-number starting at 0 */
u_short db_rlen; /* length of the record */
u_char db_nfields; /* number of fields */
u_char *db_buff; /* record-buffer to save malloc()'s */
f_descr *db_fields; /* pointer to an array of field-
* descriptions */
} dbhead;
/* structure that contains everything a user wants from a field, including
the contents (in ASCII). Warning! db_flen may be bigger than the actual
length of db_name! This is because a field doesn't have to be completely
filled */
typedef struct
{
u_char db_name[DBF_NAMELEN]; /* field-name terminated with \0 */
u_char db_type; /* field-type */
u_char db_flen; /* field-length */
u_char db_dec; /* number of decimal positions */
u_char *db_contents; /* contents of the field in ASCII */
} field;
/* prototypes for functions */
extern dbhead *dbf_open(u_char *file, int flags);
extern int dbf_write_head(dbhead * dbh);
extern int dbf_put_fields(dbhead * dbh);
extern int dbf_add_field(dbhead * dbh, u_char *name, u_char type,
u_char length, u_char dec);
extern dbhead *dbf_open_new(u_char *name, int flags);
extern void dbf_close(dbhead * dbh);
extern int dbf_get_record(dbhead * dbh, field * fields, u_long rec);
extern field *dbf_build_record(dbhead * dbh);
extern void dbf_free_record(dbhead * dbh, field * fields);
extern int dbf_put_record(dbhead * dbh, field * rec, u_long where);
/*********************************************************************
The endian-part
***********************************************************************/
extern long get_long(u_char *cp);
extern void put_long(u_char *cp, long lval);
extern short get_short(u_char *cp);
extern void put_short(u_char *cp, short lval);
#endif /* _DBF_H */
|
