60 lines
1.4 KiB
C
60 lines
1.4 KiB
C
/* clearerr( FILE * )
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This file is part of the Public Domain C Library (PDCLib).
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Permission is granted to use, modify, and / or redistribute at will.
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*/
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#include <stdio.h>
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#ifndef REGTEST
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#include "_PDCLIB_io.h"
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void _PDCLIB_clearerr_unlocked( FILE * stream )
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{
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stream->status &= ~( _PDCLIB_ERRORFLAG | _PDCLIB_EOFFLAG );
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}
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void clearerr( FILE * stream )
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{
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_PDCLIB_flockfile( stream );
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_PDCLIB_clearerr_unlocked( stream );
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_PDCLIB_funlockfile( stream );
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}
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#endif
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#ifdef TEST
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#include "_PDCLIB_test.h"
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int main( void )
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{
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FILE * fh;
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TESTCASE( ( fh = tmpfile() ) != NULL );
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/* Flags should be clear */
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TESTCASE( ! ferror( fh ) );
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TESTCASE( ! feof( fh ) );
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/* Reading from input stream - should provoke error */
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/* FIXME: Apparently glibc disagrees on this assumption. How to provoke error on glibc? */
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TESTCASE( fgetc( fh ) == EOF );
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TESTCASE( ferror( fh ) );
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TESTCASE( ! feof( fh ) );
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/* clearerr() should clear flags */
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clearerr( fh );
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TESTCASE( ! ferror( fh ) );
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TESTCASE( ! feof( fh ) );
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/* Reading from empty stream - should provoke EOF */
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rewind( fh );
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TESTCASE( fgetc( fh ) == EOF );
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TESTCASE( ! ferror( fh ) );
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TESTCASE( feof( fh ) );
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/* clearerr() should clear flags */
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clearerr( fh );
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TESTCASE( ! ferror( fh ) );
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TESTCASE( ! feof( fh ) );
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TESTCASE( fclose( fh ) == 0 );
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return TEST_RESULTS;
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}
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#endif
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