/* 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);