In a message dated 7/25/00 11:24:51 AM Eastern Daylight Time,
[EMAIL PROTECTED] writes:
<< Hi
I want to use File Streaming API in my application. I have
tried with FileWrite( ) and FileRead( ) calls. I am able to write some
bytes into a file. But reading that file always returns zero objects.
I didn't got any errors also. Can anybody suggest some way to do this.
The code follows:
int file(void)
{
FileHand tmpFile = NULL;
Int32 written, read;
char write_buffer[4] = "abcd";
char read_buffer[4] = " ";
tmpFile = FileOpen (0, "ptt1.txt", 0, 0, fileModeReadWrite, NULL);
if (tmpFile == NULL)
{
printf("Error opening file");
}
written = FileWrite (tmpFile, (void *)write_buffer, 1, 4, &err);
printf("Bytes Written = %d.\n",(int)written);
read = FileRead (tmpFile, (void *)read_buffer, 1, 4, &err);
printf("Bytes Read = %d.\n",(int)read);
err = FileClose(tiffFile);
return 0;
}
debugging returns err = 0
Thanks in advance
venkatesh >>
Just as an offhand observation of your function: if you are trying to read
the same bytes that you just wrote then you're going to want to set the file
pointer back to the beginning of the file. Otherwise, you will be attempting
to read bytes from the end of the file, in which case you would be getting
the read problem that you describe. There's probably a FileSeek() function
that you can use to reset the file pointer to anywhere that you desire
(BEGINNING, CURRENT, END).
Hope this helps, -Pete
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