src/dbf/tables.h

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/***********************************************************************************
 * tables.h
 ***********************************************************************************
 * describes table file header and table field descriptor array
 * for dBASE III PLUS, IV 2.0 and 5.0 for DOS/Windows
 *
 * Author: Bjoern Berg, clergyman@gmx.de
 * Version 0.3, August 2003
 *
 * History:
 * 2003-08-27   teterin,berg    changed unsigned integer values to u_int
 * 2003-01-21   berg                    added support for Alpha RISC systems (Cancelling 
 *                                                              datatype long, because AXP uses 8 Byte for long, 
 *                                                              i386 4 Byte -> incompatible)
 * 2002-09-22   berg                    added additional dBASE Header
 *                                                              support for dBASE IV 2.0, 5.0 DOS/Windows introduced
 * 2002-09-20   berg                    first implementation, split off dbf.c
 * 
 ************************************************************************************/

#ifndef _DBF_TABLES_
#define _DBF_TABLES_

#ifdef __unix__   
   #include <sys/types.h>
   #ifndef __ANUBISNET_TYPES__
   #define __ANUBISNET_TYPES__
     typedef u_int16_t uint16_t;
     typedef u_int32_t uint32_t;
   #endif
/*
 * Windows does not know UINT16 types, therefore we have to make an improvement
 * for 32 Bit systems. unsigned short is only verified to work properly on 32 Bit
 * systems.
 */
#elif _WIN32
        #include <windows.h>
    #ifndef __ANUBISNET_TYPES__
    #define __ANUBISNET_TYPES__
      typedef UINT32 u_int32_t; 
      typedef unsigned short u_int16_t;
    #endif
#else
   #include <sys/types.h>
#endif


/*
 * These defines are used to distinguish between types in the
 * dbf fields.
 */
#define IS_STRING 1
#define IS_NUMERIC 2

/*
 * table file header
 * Standard dBASE Header
 * Additional dBASE Header FLAGS
 * Since version IV 2.0 dBASE has introduced new flags, like:
 * - incomplete transmission
 * - encryption
 * - mdx
 * - language
 * Offsets of this header are the same in all versions of dBASE
 */
struct DB_HEADER {
        unsigned char version;                  /* Byte: 0; dBase version */
        unsigned char last_update[3];   /* Byte: 1-3; date of last update */
    //unsigned long records;            /* Byte: 4-7; number of records in table */
    unsigned int records;                       /* Byte: 4-7; number of records in table */
        u_int16_t header_length;                /* Byte: 8-9; number of bytes in the header */
        u_int16_t record_length;                /* Byte: 10-11; number of bytes in the record */
        unsigned char reserved01[2];    /* Byte: 12-13; reserved, see specification of dBase databases */
        unsigned char transaction;              /* Byte: 14; Flag indicating incomplete transaction */
        unsigned char encryption;               /* Byte: 15; Encryption Flag */
        unsigned char reserved02[12];   /* Byte: 16-27; reserved for dBASE in a multiuser environment*/
        unsigned char mdx;                              /* Byte: 28; Production MDX file flag */
        unsigned char language;                 /* Byte: 29; Language driver ID */
        unsigned char reserved03[2];    /* Byte: 30-31; reserved, filled with zero */
};

/* The field descriptor array */
/* Offsets of this header are the same in all versions of dBASE */
struct DB_FIELD {
        unsigned char field_name[11];   /* Byte: 0-10; fieldname in ASCII */
        unsigned char field_type;               /* Byte: 11; field type in ASCII (C, D, L, M or N) */
        //unsigned long field_adress;           /* Byte: 12-15; field data adress */
        u_int32_t field_adress;         /* Byte: 12-15; field data adress */
        unsigned char field_length;             /* Byte: 16; field length in binary */
        unsigned char field_decimals;   /* Byte: 17; field decimal count in binary */
        unsigned char reserved[13];             /* Byte: 18-30; reserved */
        unsigned char mdx;                              /* Byte: 31; Production MDX field flag */
};

#endif