openbios/openboot/tools/gen-seeprom/common.c

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• Hash : 1a08f436
  Author :
  Date : 2010-08-25T09:23:17
  

  change to well-formed svn directory structure. git-svn-id: svn://coreboot.org/openboot/trunk@2 4486e004-3823-0410-90c7-fb508cc143bb

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• tools/gen-seeprom/common.c

• /*
  * ========== Copyright Header Begin ==========================================
  *
  * Hypervisor Software File: common.c
  * 
  * Copyright (c) 2006 Sun Microsystems, Inc. All Rights Reserved.
  * 
  *  - Do no alter or remove copyright notices
  * 
  *  - Redistribution and use of this software in source and binary forms, with 
  *    or without modification, are permitted provided that the following 
  *    conditions are met: 
  * 
  *  - Redistribution of source code must retain the above copyright notice, 
  *    this list of conditions and the following disclaimer.
  * 
  *  - Redistribution in binary form must reproduce the above copyright notice,
  *    this list of conditions and the following disclaimer in the
  *    documentation and/or other materials provided with the distribution. 
  * 
  *    Neither the name of Sun Microsystems, Inc. or the names of contributors 
  * may be used to endorse or promote products derived from this software 
  * without specific prior written permission. 
  * 
  *     This software is provided "AS IS," without a warranty of any kind. 
  * ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES, 
  * INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A 
  * PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN 
  * MICROSYSTEMS, INC. ("SUN") AND ITS LICENSORS SHALL NOT BE LIABLE FOR 
  * ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR 
  * DISTRIBUTING THIS SOFTWARE OR ITS DERIVATIVES. IN NO EVENT WILL SUN 
  * OR ITS LICENSORS BE LIABLE FOR ANY LOST REVENUE, PROFIT OR DATA, OR 
  * FOR DIRECT, INDIRECT, SPECIAL, CONSEQUENTIAL, INCIDENTAL OR PUNITIVE 
  * DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY, 
  * ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE, EVEN IF 
  * SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
  * 
  * You acknowledge that this software is not designed, licensed or
  * intended for use in the design, construction, operation or maintenance of
  * any nuclear facility. 
  * 
  * ========== Copyright Header End ============================================
  */
  /*
   * id: @(#)common.c 1.2 02/01/24
   * purpose:
   * copyright: Copyright 2000-2002 Sun Microsystems, Inc.  All Rights Reserved
   * copyright: Use is subject to license terms.
   */
  
  #include <stdio.h>
  #include <stdlib.h>
  #include <strings.h>
  #include "gen-seeprom.h"
  #include "prototypes.h"
  
  union data_format {
  	unsigned char str[8];
  	unsigned long long value;
  };
  
  /*
   * scan decimal or hex value in from a line of input
   */
  
  
  void
  strip_val(char *input_str, unsigned int *input_val)
  {
  	if ((strncmp(input_str, "0x", 2) == 0) ||
  	    (strncmp(input_str, "0X", 2) == 0)) {
  		sscanf(&input_str[2], "%x", input_val);
  	} else {
  		sscanf(&input_str[0], "%d", input_val);
  	}
  }
  
  int
  scan_line(char *line, unsigned int *input_val)
  {
  	char temp[MAXNAMESIZE];
  	char input_str[MAXNAMESIZE];
  
  	if (sscanf(line, "%32s %32s", temp, input_str) != 2) {
  		return (ERROR);
  	}
  	strip_val(input_str, input_val);
  	return (NO_ERROR);
  }
  
  
  /*
   * convert an integer value into a byte string and assign it to data_ptr
   * at the given offset
   */
  
  void
  write_bytes(unsigned int input_val, int size, int offset,
      unsigned char *data_ptr)
  {
  	unsigned char byte;
  
  	while (size) {
  		byte = input_val >> ((size-1)*8);
  		byte &= 0xff;
  		data_ptr[offset++] = byte;
  		size--;
  	}
  }
  
  void
  store_chars(int len, unsigned char *string, unsigned char **ptr)
  {
  	union data_format data;
  
  	while (len > 0) {
  		if (len > 8) {
  			memcpy(data.str, string, 8);
  			store_bytes(8, data.value, ptr);
  			len -= 8;
  			string += 8;
  		} else {
  			memcpy(data.str, string, len);
  			data.value >>= (8-len)*8;
  			store_bytes(len, data.value, ptr);
  			len = 0;
  		}
  	}
  }
  
  /* Internet checksum */
  unsigned short
  checksum(unsigned short *addr, int count)
  {
  	int sum = 0;
  	while (count > 1) {
  		sum += *addr++;
  		count -= 2;
  	}
  
  	if (count > 0)
  		sum += *(unsigned char *) addr;
  
  	while (sum >> 16) {
  		sum = (sum & 0xffff) + (sum >> 16);
  	}
  
  	sum = (~sum) & 0xffff;
  	if (sum == 0)
  		sum = 0xffff;
  	return (sum);
  }
  

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