40 lines
954 B
C
40 lines
954 B
C
|
/* _PDCLIB_prepwrite( struct _PDCLIB_file_t * )
|
||
|
|
|
||
|
|
This file is part of the Public Domain C Library (PDCLib).
|
||
|
|
Permission is granted to use, modify, and / or redistribute at will.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <stdio.h>
|
||
|
|
|
||
|
|
#ifndef REGTEST
|
||
|
|
|
||
|
|
int _PDCLIB_prepwrite( struct _PDCLIB_file_t * stream )
|
||
|
|
{
|
||
|
|
if ( ( stream->bufidx < stream->bufend ) || ( stream->ungetidx > 0 ) ||
|
||
|
|
( stream->status & ( _PDCLIB_FREAD | _PDCLIB_ERRORFLAG | _PDCLIB_WIDESTREAM | _PDCLIB_EOFFLAG ) ) ||
|
||
|
|
!( stream->status & ( _PDCLIB_FWRITE | _PDCLIB_FAPPEND | _PDCLIB_FRW ) ) )
|
||
|
|
{
|
||
|
|
/* Function called on illegal (e.g. input) stream. */
|
||
|
|
*_PDCLIB_errno_func() = _PDCLIB_EBADF;
|
||
|
|
stream->status |= _PDCLIB_ERRORFLAG;
|
||
|
|
return EOF;
|
||
|
|
}
|
||
|
|
|
||
|
|
stream->status |= _PDCLIB_FWRITE | _PDCLIB_BYTESTREAM;
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#ifdef TEST
|
||
|
|
|
||
|
|
#include "_PDCLIB_test.h"
|
||
|
|
|
||
|
|
int main( void )
|
||
|
|
{
|
||
|
|
/* Testing covered by ftell.c */
|
||
|
|
return TEST_RESULTS;
|
||
|
|
}
|
||
|
|
|
||
|
|
#endif
|