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[/] [openrisc/] [trunk/] [rtos/] [ecos-2.0/] [packages/] [redboot/] [v2_0/] [src/] [cksum.c] - Rev 27
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//========================================================================== // // cksum.c // // RedBoot POSIX CRC calculation/command // //========================================================================== //####ECOSGPLCOPYRIGHTBEGIN#### // ------------------------------------------- // This file is part of eCos, the Embedded Configurable Operating System. // Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc. // Copyright (C) 2002 Gary Thomas // // 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): gthomas // Contributors: gthomas // Date: 2001-01-31 // Purpose: // Description: // // This code is part of RedBoot (tm). // //####DESCRIPTIONEND#### // //========================================================================== #include <redboot.h> // Compute a CRC, using the POSIX 1003 definition RedBoot_cmd("cksum", "Compute a 32bit checksum [POSIX algorithm] for a range of memory", "-b <location> -l <length>", do_cksum ); void do_cksum(int argc, char *argv[]) { struct option_info opts[2]; unsigned long base, len, crc; bool base_set, len_set; init_opts(&opts[0], 'b', true, OPTION_ARG_TYPE_NUM, (void **)&base, (bool *)&base_set, "base address"); init_opts(&opts[1], 'l', true, OPTION_ARG_TYPE_NUM, (void **)&len, (bool *)&len_set, "length"); if (!scan_opts(argc, argv, 1, opts, 2, 0, 0, "")) { return; } if (!base_set || !len_set) { if (load_address >= (CYG_ADDRESS)ram_start && load_address_end < (CYG_ADDRESS)ram_end && load_address < load_address_end) { base = load_address; len = load_address_end - load_address; diag_printf("Computing cksum for area %p-%p\n", base, load_address_end); } else { diag_printf("usage: cksum -b <addr> -l <length>\n"); return; } } crc = cyg_posix_crc32((unsigned char *)base, len); diag_printf("POSIX cksum = %lu %lu (0x%08lx 0x%08lx)\n", crc, len, crc, len); }
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