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/* freopen_s( FILE **, const char *, const char *, FILE * )
This file is part of the Public Domain C Library (PDCLib).
Permission is granted to use, modify, and / or redistribute at will.
*/
#define __STDC_WANT_LIB_EXT1__ 1
#include <stdio.h>
#include <stdlib.h>
#ifndef REGTEST
_PDCLIB_PUBLIC errno_t freopen_s( FILE * _PDCLIB_restrict * _PDCLIB_restrict newstreamptr, const char * _PDCLIB_restrict filename, const char * _PDCLIB_restrict mode, FILE * _PDCLIB_restrict stream )
{
if ( newstreamptr == NULL || mode == NULL || stream == NULL )
{
if ( newstreamptr != NULL )
{
*newstreamptr = NULL;
}
_PDCLIB_constraint_handler( _PDCLIB_CONSTRAINT_VIOLATION( _PDCLIB_EINVAL ) );
return _PDCLIB_EINVAL;
}
if ( ( *newstreamptr = freopen( filename, mode, stream ) ) == NULL )
{
return *_PDCLIB_errno_func();
}
return 0;
}
#endif
#ifdef TEST
#include "_PDCLIB_test.h"
#if ! defined( REGTEST ) || defined( __STDC_LIB_EXT1__ )
static int HANDLER_CALLS = 0;
static void test_handler( const char * _PDCLIB_restrict msg, void * _PDCLIB_restrict ptr, errno_t error )
{
++HANDLER_CALLS;
}
#endif
int main( void )
{
#if ! defined( REGTEST ) || defined( __STDC_LIB_EXT1__ )
FILE * fin;
FILE * fout;
FILE * dummy;
set_constraint_handler_s( test_handler );
TESTCASE( ( fin = fopen( testfile1, "wb+" ) ) != NULL );
TESTCASE( fputc( 'x', fin ) == 'x' );
TESTCASE( fclose( fin ) == 0 );
TESTCASE( freopen_s( &fin, testfile1, "rb", stdin ) == 0 );
TESTCASE( getchar() == 'x' );
TESTCASE( freopen_s( &fout, testfile2, "wb+", stdout ) == 0 );
TESTCASE( putchar( 'x' ) == 'x' );
rewind( fout );
TESTCASE( fgetc( fout ) == 'x' );
dummy = fin;
TESTCASE( freopen_s( &dummy, testfile1, "rb", NULL ) != 0 );
dummy = fin;
TESTCASE( freopen_s( &dummy, testfile1, NULL, stdin ) != 0 );
TESTCASE( freopen_s( NULL, testfile1, "rb", fin ) != 0 );
TESTCASE( fclose( fin ) == 0 );
TESTCASE( fclose( fout ) == 0 );
TESTCASE( remove( testfile1 ) == 0 );
TESTCASE( remove( testfile2 ) == 0 );
TESTCASE( HANDLER_CALLS == 3 );
#else
TESTCASE( NO_TESTDRIVER );
#endif
return TEST_RESULTS;
}
#endif
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