/* $Id$ */
-/* fread( void *, size_t, size_t, FILE * )
+/* fwrite( void *, size_t, size_t, 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 <_PDCLIB_glue.h>
#ifndef REGTEST
+#include <_PDCLIB_io.h>
-size_t fread( void * _PDCLIB_restrict ptr, size_t size, size_t nmemb, struct _PDCLIB_file_t * _PDCLIB_restrict stream )
+#include <stdbool.h>
+#include <string.h>
+
+size_t fread_unlocked(
+ void * _PDCLIB_restrict ptr,
+ size_t size, size_t nmemb,
+ FILE * _PDCLIB_restrict stream
+)
{
- return _PDCLIB_read( stream->handle, ptr, size * nmemb );
+ if ( _PDCLIB_prepread( stream ) == EOF )
+ {
+ return 0;
+ }
+ char * dest = (char *)ptr;
+ size_t nmemb_i;
+ for ( nmemb_i = 0; nmemb_i < nmemb; ++nmemb_i )
+ {
+ size_t numread = _PDCLIB_getchars( &dest[ nmemb_i * size ], size, EOF,
+ stream );
+ if( numread != size )
+ break;
+ }
+ return nmemb_i;
+}
+
+size_t fread( void * _PDCLIB_restrict ptr,
+ size_t size, size_t nmemb,
+ FILE * _PDCLIB_restrict stream )
+{
+ flockfile( stream );
+ size_t r = fread_unlocked( ptr, size, nmemb, stream );
+ funlockfile( stream );
+ return r;
}
#endif
int main( void )
{
- /* Testing handled by fwrite(). */
+ FILE * fh;
+ char const * message = "Testing fwrite()...\n";
+ char buffer[21];
+ buffer[20] = 'x';
+ TESTCASE( ( fh = tmpfile() ) != NULL );
+ /* fwrite() / readback */
+ TESTCASE( fwrite( message, 1, 20, fh ) == 20 );
+ rewind( fh );
+ TESTCASE( fread( buffer, 1, 20, fh ) == 20 );
+ TESTCASE( memcmp( buffer, message, 20 ) == 0 );
+ TESTCASE( buffer[20] == 'x' );
+ /* same, different nmemb / size settings */
+ rewind( fh );
+ TESTCASE( memset( buffer, '\0', 20 ) == buffer );
+ TESTCASE( fwrite( message, 5, 4, fh ) == 4 );
+ rewind( fh );
+ TESTCASE( fread( buffer, 5, 4, fh ) == 4 );
+ TESTCASE( memcmp( buffer, message, 20 ) == 0 );
+ TESTCASE( buffer[20] == 'x' );
+ /* same... */
+ rewind( fh );
+ TESTCASE( memset( buffer, '\0', 20 ) == buffer );
+ TESTCASE( fwrite( message, 20, 1, fh ) == 1 );
+ rewind( fh );
+ TESTCASE( fread( buffer, 20, 1, fh ) == 1 );
+ TESTCASE( memcmp( buffer, message, 20 ) == 0 );
+ TESTCASE( buffer[20] == 'x' );
+ /* Done. */
+ TESTCASE( fclose( fh ) == 0 );
return TEST_RESULTS;
}
#endif
+