xBase core — XBASE.H

/* main dbf file functions */



/* system definitions */

#define AMIGADOS 0 

#define IBMPCDOS 1

/* dbase constants */      

#define TRUE 1 

#define FALSE 0 

#define block_size 32  

#define end_of_field "/r"

#define max_recs 1000     /* 4000 chars or 128 fields */

#define max_fields 128

#define max_numeric 19

#define max_index 5   

#define max_area 25     

#define date_size 8

#define fld_nam_len 11

#define header_terminator_byte 0x0D                          

#define is_deleted 0x2A

#define not_deleted 0x20



/* dbase type definitions */

typedef char *string ;

typedef char update[3];   

typedef char dbfile[12];      

typedef char order_type[3];

typedef order_type order_array_type[max_fields] ;  

typedef char field_name[fld_nam_len];            





typedef struct header_rec

{

   char version ;                  /* 0x03 for DBIII */

   update last_updated ;

   long num_of_recs ;

   short data_start ;              /* offset of actual data */

   short cpr ;                     /* chars per rec */

   char reserved[20] ;

}  header_rec ;					   /* 32 bytes */	



typedef struct field_rec           /* 32 bytes for each field */

{

   char field_name[11] ; 

   char field_type ; 

   long field_data_address ;

   char field_length ;

   char decimal_places ;

   short  multiuser1 ;

   char workid ;

   short  multiuser2 ;

   char flag ;

   char reserved[8] ;

}  field_rec ;    



typedef struct field_rec field_array[max_fields];         

              

typedef struct index

{                 

   char       idx; 

   ENTRY      *pe;

   IX_DESC    *pix;             

}  index;	  



typedef struct select_rec

{  

   char        a;               /* area used for this file */

   FILE       *fp;              /* file pointer */   

   char        fok;             /* file status */

   header_rec *hr;              /* header info */

   field_rec  *fr[max_fields];  /* field info */

   string      fd[max_fields];  /* make a string for each field in a rec */

   short       num_of_fields;

   long        crn;             /* current record number */

   char       *rd;              /* record data buffer */    

   char        del;             /* delete status of current record */

   char        ord;             /* current index order */ 

/* index fields for bplus */ 

   index       i[max_index];  

}  select_rec ;

   

/* Prototypes */    

   

/* misc functions */

#ifdef AMIGADOS

   void swab(char *int1,char *int2, int no_bytes) ; 

#endif   

       

char   wait(char ch);       

void   charproc(char *field, char length, long sub) ;

string dateproc(int length, int sub, int sub2) ;

char   logiproc(int sub, int sub2) ;

string memoproc(int sub,int sub2) ;

string nmbrproc(int length, int sub, int sub2) ;

string dbname(string tmpstr) ;

string dxname(string tmpstr) ;  

string rstr(string tmpstr, int newlen);

string lstr(string tmpstr, int newlen);

void   rtrim(string tmpfld);   

int    strnicmps(char *str1,char *str2) ;  

void   memchk(char *buff,char *function,char variable[],unsigned long mem);





/* file functions */    

int  initbase(); 

int  read_rec(char area);

void write_rec(char area);

int  add_rec(char area);

int  goto_rec(long recnum); 

int  del_rec(char area);

void pack(char area);

int  read_header(char area);  

int  open_file(dbfile filename, char area);

void close_file(char area);

void read_fields(char area);

void import(dbfile infile, dbfile outfile);

void export(dbfile infile, dbfile outfile);    

void swabdbf(dbfile infile);   

void copyfile(char *cp[]);  

void create_dbf(dbfile outfile,field_array fields,int num_of_fields);

int  copy_stru(dbfile outfile);