mirror of
https://github.com/cc65/cc65.git
synced 2024-11-04 17:04:58 +00:00
52 lines
872 B
C
52 lines
872 B
C
/*
|
|
* fwrite.c
|
|
*
|
|
* Ullrich von Bassewitz, 04.06.1998
|
|
*/
|
|
|
|
|
|
|
|
#include <stdio.h>
|
|
#include <fcntl.h>
|
|
#include <errno.h>
|
|
#include "_file.h"
|
|
|
|
|
|
|
|
size_t fwrite (const void* buf, size_t size, size_t count, FILE* f)
|
|
{
|
|
int bytes;
|
|
|
|
/* Is the file open? */
|
|
if ((f->f_flags & _FOPEN) == 0) {
|
|
_errno = EINVAL; /* File not open */
|
|
return 0;
|
|
}
|
|
|
|
/* Did we have an error */
|
|
if ((f->f_flags & _FERROR) != 0) {
|
|
/* Cannot write to stream */
|
|
return 0;
|
|
}
|
|
|
|
/* How many bytes to write? */
|
|
bytes = size * count;
|
|
|
|
if (bytes) {
|
|
/* Write the data. */
|
|
if (write (f->f_fd, buf, bytes) == -1) {
|
|
/* Write error */
|
|
f->f_flags |= _FERROR;
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
/* Don't waste time with expensive calculations, assume the write was
|
|
* complete and return the count of items.
|
|
*/
|
|
return count;
|
|
}
|
|
|
|
|
|
|