Mercurial > nand-ecoscentric
diff packages/language/c/libc/current/src/stdio/input/fgetc.cxx @ 0:3111d98ba7b3 ecos-v1_1-release
Initial commit of eCos version 1.1
| author | jlarmour |
|---|---|
| date | Tue, 11 May 1999 11:16:07 +0000 |
| parents | |
| children | 443894e2e912 |
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new file mode 100644 --- /dev/null +++ b/packages/language/c/libc/current/src/stdio/input/fgetc.cxx @@ -0,0 +1,95 @@ +//=========================================================================== +// +// fgetc.cxx +// +// ANSI Stdio fgetc() function +// +//=========================================================================== +//####COPYRIGHTBEGIN#### +// +// ------------------------------------------- +// The contents of this file are subject to the Cygnus eCos Public License +// Version 1.0 (the "License"); you may not use this file except in +// compliance with the License. You may obtain a copy of the License at +// http://sourceware.cygnus.com/ecos +// +// Software distributed under the License is distributed on an "AS IS" +// basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the +// License for the specific language governing rights and limitations under +// the License. +// +// The Original Code is eCos - Embedded Cygnus Operating System, released +// September 30, 1998. +// +// The Initial Developer of the Original Code is Cygnus. Portions created +// by Cygnus are Copyright (C) 1998 Cygnus Solutions. All Rights Reserved. +// ------------------------------------------- +// +//####COPYRIGHTEND#### +//=========================================================================== +//#####DESCRIPTIONBEGIN#### +// +// Author(s): jlarmour +// Contributors: jlarmour@cygnus.co.uk +// Date: 1998-02-13 +// Purpose: +// Description: +// Usage: +// +//####DESCRIPTIONEND#### +// +//=========================================================================== + +// CONFIGURATION + +#include <pkgconf/libc.h> // Configuration header + +// Include the C library? And do we want the stdio stuff? +#if defined(CYGPKG_LIBC) && defined(CYGPKG_LIBC_STDIO) + +// INCLUDES + +#include <cyg/infra/cyg_type.h> // Common project-wide type definitions +#include <stddef.h> // NULL and size_t from compiler +#include <stdio.h> // header for this file +#include <errno.h> // error codes +#include "clibincl/stdiosupp.hxx" // Support functions for stdio +#include "clibincl/stream.hxx" // Cyg_StdioStream + +// EXPORTED SYMBOLS + +externC int +fgetc( FILE * ) CYGPRI_LIBC_WEAK_ALIAS("_fgetc"); + +// FUNCTIONS + +externC int +_fgetc( FILE *stream ) +{ + Cyg_StdioStream *real_stream = (Cyg_StdioStream *)stream; + cyg_ucount32 bytes_read; + Cyg_ErrNo err; + cyg_uint8 c; + + err = real_stream->read( &c, 1, &bytes_read ); + + if (!err && !bytes_read) // if no err, but nothing to read, try again + { + real_stream->refill_read_buffer(); + err = real_stream->read( &c, 1, &bytes_read ); + } // if + + if (err) + { + real_stream->set_error( err ); + errno = err; + return EOF; + } // if + + return (int)c; + +} // _fgetc() + +#endif // if defined(CYGPKG_LIBC) && defined(CYGPKG_LIBC_STDIO) + +// EOF fgetc.cxx
