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//=========================================================================== // // ungetc.cxx // // ANSI Stdio ungetc() function // //=========================================================================== //####ECOSGPLCOPYRIGHTBEGIN#### // ------------------------------------------- // This file is part of eCos, the Embedded Configurable Operating System. // Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc. // // eCos is free software; you can redistribute it and/or modify it under // the terms of the GNU General Public License as published by the Free // Software Foundation; either version 2 or (at your option) any later version. // // eCos is distributed in the hope that it will be useful, but WITHOUT ANY // WARRANTY; without even the implied warranty of MERCHANTABILITY or // FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License // for more details. // // You should have received a copy of the GNU General Public License along // with eCos; if not, write to the Free Software Foundation, Inc., // 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. // // As a special exception, if other files instantiate templates or use macros // or inline functions from this file, or you compile this file and link it // with other works to produce a work based on this file, this file does not // by itself cause the resulting work to be covered by the GNU General Public // License. However the source code for this file must still be made available // in accordance with section (3) of the GNU General Public License. // // This exception does not invalidate any other reasons why a work based on // this file might be covered by the GNU General Public License. // // Alternative licenses for eCos may be arranged by contacting Red Hat, Inc. // at http://sources.redhat.com/ecos/ecos-license/ // ------------------------------------------- //####ECOSGPLCOPYRIGHTEND#### //=========================================================================== //#####DESCRIPTIONBEGIN#### // // Author(s): jlarmour // Contributors: // Date: 2000-04-20 // Purpose: // Description: // Usage: // //####DESCRIPTIONEND#### // //=========================================================================== // CONFIGURATION #include <pkgconf/libc_stdio.h> // Configuration header // 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 <cyg/libc/stdio/stream.hxx> // Cyg_StdioStream // FUNCTIONS externC int ungetc( int c, FILE *stream ) { Cyg_StdioStream *real_stream = (Cyg_StdioStream *)stream; Cyg_ErrNo err; cyg_uint8 real_c; if (c == EOF) return EOF; real_c = (cyg_uint8) c; err = real_stream->unread_byte( real_c ); if (err) { errno = err; return EOF; } // if return (int)real_c; } // ungetc() // EOF ungetc.cxx