97 lines
2.6 KiB
C
97 lines
2.6 KiB
C
|
/* ftell( FILE * )
|
||
|
|
|
||
|
|
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>
|
||
|
|
#include <stdint.h>
|
||
|
|
#include <limits.h>
|
||
|
|
#include <errno.h>
|
||
|
|
|
||
|
|
#ifndef REGTEST
|
||
|
|
#include "_PDCLIB_io.h"
|
||
|
|
|
||
|
|
long int _PDCLIB_ftell_unlocked( FILE * stream )
|
||
|
|
{
|
||
|
|
uint_fast64_t off64 = _PDCLIB_ftell64_unlocked( stream );
|
||
|
|
|
||
|
|
if ( off64 > LONG_MAX )
|
||
|
|
{
|
||
|
|
/* integer overflow */
|
||
|
|
errno = ERANGE;
|
||
|
|
return -1;
|
||
|
|
}
|
||
|
|
return off64;
|
||
|
|
}
|
||
|
|
|
||
|
|
long int ftell( FILE * stream )
|
||
|
|
{
|
||
|
|
_PDCLIB_flockfile( stream );
|
||
|
|
long int off = _PDCLIB_ftell_unlocked( stream );
|
||
|
|
_PDCLIB_funlockfile( stream );
|
||
|
|
return off;
|
||
|
|
}
|
||
|
|
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#ifdef TEST
|
||
|
|
#include "_PDCLIB_test.h"
|
||
|
|
#include <stdlib.h>
|
||
|
|
#ifndef REGTEST
|
||
|
|
#include "_PDCLIB_io.h"
|
||
|
|
#endif
|
||
|
|
|
||
|
|
int main( void )
|
||
|
|
{
|
||
|
|
/* Testing all the basic I/O functions individually would result in lots
|
||
|
|
of duplicated code, so I took the liberty of lumping it all together
|
||
|
|
here.
|
||
|
|
*/
|
||
|
|
/* The following functions delegate their tests to here:
|
||
|
|
fgetc fflush rewind fputc ungetc fseek
|
||
|
|
flushbuffer seek fillbuffer prepread prepwrite
|
||
|
|
*/
|
||
|
|
char * buffer = (char*)malloc( 4 );
|
||
|
|
FILE * fh;
|
||
|
|
TESTCASE( ( fh = tmpfile() ) != NULL );
|
||
|
|
TESTCASE( setvbuf( fh, buffer, _IOLBF, 4 ) == 0 );
|
||
|
|
/* Testing ungetc() at offset 0 */
|
||
|
|
rewind( fh );
|
||
|
|
TESTCASE( ungetc( 'x', fh ) == 'x' );
|
||
|
|
TESTCASE( ftell( fh ) == -1l );
|
||
|
|
rewind( fh );
|
||
|
|
TESTCASE( ftell( fh ) == 0l );
|
||
|
|
/* Commence "normal" tests */
|
||
|
|
TESTCASE( fputc( '1', fh ) == '1' );
|
||
|
|
TESTCASE( fputc( '2', fh ) == '2' );
|
||
|
|
TESTCASE( fputc( '3', fh ) == '3' );
|
||
|
|
/* Positions incrementing as expected? */
|
||
|
|
TESTCASE( ftell( fh ) == 3l );
|
||
|
|
TESTCASE_NOREG( fh->pos.offset == 0l );
|
||
|
|
TESTCASE_NOREG( fh->bufidx == 3l );
|
||
|
|
/* Buffer properly flushed when full? */
|
||
|
|
TESTCASE( fputc( '4', fh ) == '4' );
|
||
|
|
TESTCASE_NOREG( fh->pos.offset == 4l );
|
||
|
|
TESTCASE_NOREG( fh->bufidx == 0 );
|
||
|
|
/* fflush() resetting positions as expected? */
|
||
|
|
TESTCASE( fputc( '5', fh ) == '5' );
|
||
|
|
TESTCASE( fflush( fh ) == 0 );
|
||
|
|
TESTCASE( ftell( fh ) == 5l );
|
||
|
|
TESTCASE_NOREG( fh->pos.offset == 5l );
|
||
|
|
TESTCASE_NOREG( fh->bufidx == 0l );
|
||
|
|
/* rewind() resetting positions as expected? */
|
||
|
|
rewind( fh );
|
||
|
|
TESTCASE( ftell( fh ) == 0l );
|
||
|
|
TESTCASE_NOREG( fh->pos.offset == 0 );
|
||
|
|
TESTCASE_NOREG( fh->bufidx == 0 );
|
||
|
|
/* Reading back first character after rewind for basic read check */
|
||
|
|
TESTCASE( fgetc( fh ) == '1' );
|
||
|
|
/* TODO: t.b.c. */
|
||
|
|
TESTCASE( fclose( fh ) == 0 );
|
||
|
|
return TEST_RESULTS;
|
||
|
|
}
|
||
|
|
|
||
|
|
#endif
|
||
|
|
|