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/*
** Copyright (C) 2003 Christophe Kalt
**
** This file is part of shush,
** see the LICENSE file for details on your rights.
*/
#include "os.h"
#include <ctype.h>
#include "byteset.h"
static char const rcsid[] = "@(#)$Id: byteset.c 1404 2008-03-08 23:25:46Z kalt $";
static long set[256];
static int once = 1;
/*
** byteset_init
** Initialize set[] from a range definition string
*/
void
byteset_init(char *definition, int value)
{
char *str, *tok, *dash;
int i, j;
assert( definition != NULL );
if (once == 1)
{
once = 0;
i = 0;
while (i < 256)
set[i++] = 0;
}
str = strdup(definition);
tok = strtok(str, ",");
while (tok != NULL)
{
if (tok[0] == '-')
i = 0;
else if (isdigit((int) tok[0]) != 0)
i = atoi(tok);
else
i = -1;
j = i;
dash = index(tok, '-');
if (dash != NULL)
{
if (*(dash + 1) != '\0')
{
if (isdigit((int) *(dash + 1)) != 0)
j = atoi(dash + 1);
else
j = -1;
}
else
j = 255;
}
if (i < 0 || i > 255 || j < 0 || j > 255 || j < i)
{
error("Invalid range: %s", tok);
exit(1);
}
while (i <= j)
set[i++] = value;
tok = strtok(NULL, ",");
}
free(str);
}
/*
** byteset_set
** Sets the value of a byte in the set
*/
void
byteset_set(int byte, int value)
{
assert( byte >= 0 && byte <= 255 );
set[byte] = value;
}
/*
** byteset_get
** Return the value of a byte in the set
*/
int
byteset_get(int byte)
{
assert( byte >= 0 && byte <= 255 );
return set[byte];
}
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