//=========================================================================== // // fseek.cxx // // Implementation of C library file positioning functions as per ANSI 7.9.9 // //=========================================================================== // ####ECOSGPLCOPYRIGHTBEGIN#### // ------------------------------------------- // This file is part of eCos, the Embedded Configurable Operating System. // Copyright (C) 1998, 1999, 2000, 2001, 2002 Free Software Foundation, 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., // 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, 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 v2. // // This exception does not invalidate any other reasons why a work based // on this file might be covered by the GNU General Public License. // ------------------------------------------- // ####ECOSGPLCOPYRIGHTEND#### //=========================================================================== //#####DESCRIPTIONBEGIN#### // // Author(s): nickg // Contributors: // Date: 2000-07-12 // Purpose: Implements ISO C file positioning functions // Description: // Usage: // //####DESCRIPTIONEND#### // //=========================================================================== // CONFIGURATION #include // Configuration header #include // Common project-wide type definitions #include // Assertion support #include // Tracing support #include // NULL and size_t from compiler #include // Error codes #include // header for fseek() etc. #include // C library files #include // C library streams //======================================================================== // ISO C 7.9.9 File positioning functions externC int fgetpos( FILE * stream , fpos_t *pos ) __THROW { Cyg_StdioStream *real_stream = (Cyg_StdioStream *)stream; Cyg_ErrNo err; int ret = 0; CYG_REPORT_FUNCNAME( "fgetpos" ); err = real_stream->get_position( pos ); if( err != ENOERR ) { errno = err; ret = -1; } CYG_REPORT_RETVAL( ret ); return ret; } externC int fseek( FILE * stream , long int offset , int whence ) __THROW { Cyg_StdioStream *real_stream = (Cyg_StdioStream *)stream; Cyg_ErrNo err; int ret = 0; CYG_REPORT_FUNCNAME( "fgetpos" ); err = real_stream->set_position( (fpos_t)offset, whence ); if( err != ENOERR ) { errno = err; ret = -1; } CYG_REPORT_RETVAL( ret ); return ret; } externC int fsetpos( FILE * stream , const fpos_t * pos ) __THROW { Cyg_StdioStream *real_stream = (Cyg_StdioStream *)stream; Cyg_ErrNo err; int ret = 0; CYG_REPORT_FUNCNAME( "fgetpos" ); err = real_stream->set_position( *pos, SEEK_SET ); if( err != ENOERR ) { errno = err; ret = -1; } CYG_REPORT_RETVAL( ret ); return ret; } externC long int ftell( FILE * stream ) __THROW { Cyg_StdioStream *real_stream = (Cyg_StdioStream *)stream; Cyg_ErrNo err; long int ret = 0; fpos_t pos; CYG_REPORT_FUNCNAME( "ftell" ); err = real_stream->get_position( &pos ); if( err != ENOERR ) { errno = err; ret = -1; } else ret = pos; CYG_REPORT_RETVAL( ret ); return ret; } externC void rewind( FILE * stream ) __THROW { Cyg_StdioStream *real_stream = (Cyg_StdioStream *)stream; (void)fseek( stream, 0L, SEEK_SET ); real_stream->set_error( ENOERR ); } // EOF fseek.cxx