[moira.git] / update / checksum.c

/* $Id$
 *
 * Copyright (C) 1988-1998 by the Massachusetts Institute of Technology.
 * For copying and distribution information, please see the file
 * <mit-copyright.h>.
 */

#include <mit-copyright.h>
#include <moira.h>
#include "update_server.h"

#include <stdio.h>

RCSID("$Header$");

/*
 * checksum_fd(fd)
 * returns 24-bit checksum of bytes in file
 */

long checksum_file(char *path)
{
  long sum;
  int ch;
  FILE *f;

  sum = 0;
  f = fopen(path, "r");
  while ((ch = getc(f)) != EOF)
    sum = (sum + ch) & ((1 << 24) - 1);
  fclose(f);
  return sum;
}
Commit	Line	Data
7ac48069	1	/* $Id$
	2	*
	3	* Copyright (C) 1988-1998 by the Massachusetts Institute of Technology.
	4	* For copying and distribution information, please see the file
	5	* <mit-copyright.h>.
de56407f	6	*/
de56407f	7
546bc43b	8	#include <mit-copyright.h>
7ac48069	9	#include <moira.h>
	10	#include "update_server.h"
	11
de56407f	12	#include <stdio.h>
7ac48069	13
7ac48069	14	RCSID("$Header$");
de56407f	15
	16	/*
	17	* checksum_fd(fd)
	18	* returns 24-bit checksum of bytes in file
	19	*/
	20
85330553	21	long checksum_file(char *path)
de56407f	22	{
85330553	23	long sum;
44d12d58	24	int ch;
44d12d58	25	FILE *f;
de56407f	26
5eaef520	27	sum = 0;
	28	f = fopen(path, "r");
	29	while ((ch = getc(f)) != EOF)
	30	sum = (sum + ch) & ((1 << 24) - 1);
	31	fclose(f);
	32	return sum;
de56407f	33	}