Hi All, I'm in the process of rewriting some very old C ( but still
useful ) database utilities and need some help with the type of "read"
function used in many of them. Is there an equivalent "read" function in
C# ? If I'm reading this correctly ( pun intended !) this read function
reads a numer of bytes directly into a struct
Regards
#include "stdafx.h"
#include "dbfhead.h"
#include "stdio.h"
#include "stdlib.h"
#include "fcntl.h"
#include "io.h"
#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif
typedef struct
{
char dbf_id;
char last_update[3];
long last_rec;
short data_offset;
short rec_size;
char filler[20];
} DBF_HEAD;
int _tmain(int argc, TCHAR* argv[], TCHAR* envp[])
{
int nRetCode = 0;
int handle;
DBF_HEAD dbf_head;
if(argv[1] == NULL)
{
printf("Usage dbfhead dbname, e.g. dbfhead c:\\data\\datfile.dbf\n");
exit(-1);
}
handle = open(argv[1],O_RDONLY|O_RAW);
if(read(handle,(char*)&dbf_head,sizeof(dbf_head)) !=sizeof(DBF_HEAD))
{
printf("\nRead Error\n");
exit(1);
}
printf("\n*** Database Header %s ***\n\n",argv[1]);
printf("\nDbf Id %d\n",dbf_head.dbf_id);
printf("Last Update %d %d
%ld\n\n",dbf_head.last_update[2],dbf_head.last_update[1],dbf_head.last_update[0]);
printf("Data Offset %d\n",dbf_head.data_offset);
printf("Record Size %d\n",dbf_head.rec_size);
printf("Number of Records %ld\n",dbf_head.last_rec);
close(handle);
return nRetCode;
}
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