mirror of
https://github.com/cc65/cc65.git
synced 2024-12-28 22:30:12 +00:00
47 lines
655 B
C
47 lines
655 B
C
|
/*
|
||
|
|
* Ullrich von Bassewitz, 11.08.1998
|
||
|
|
*
|
||
|
|
* int fgetc (FILE* f);
|
||
|
|
*/
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
#include <stdio.h>
|
||
|
|
#include <fcntl.h>
|
||
|
|
#include <errno.h>
|
||
|
|
#include "_file.h"
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
int fgetc (FILE* f)
|
||
|
|
{
|
||
|
|
char c;
|
||
|
|
|
||
|
|
/* Check if the file is open or if there is an error condition */
|
||
|
|
if ((f->f_flags & _FOPEN) == 0 || (f->f_flags & (_FERROR | _FEOF)) != 0) {
|
||
|
|
return -1;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Read the byte */
|
||
|
|
switch (read (f->f_fd, &c, 1)) {
|
||
|
|
|
||
|
|
case -1:
|
||
|
|
/* Error */
|
||
|
|
f->f_flags |= _FERROR;
|
||
|
|
return -1;
|
||
|
|
|
||
|
|
case 0:
|
||
|
|
/* EOF */
|
||
|
|
f->f_flags |= _FEOF;
|
||
|
|
return -1;
|
||
|
|
|
||
|
|
default:
|
||
|
|
/* Char read */
|
||
|
|
return ((int) c) & 0xFF;
|
||
|
|
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
|