csu3_am335x/EVSE/GPL/open-plc-utils-0.3/tools/uintspec.c

/*====================================================================*
 *
 *   uint64_t uintspec (char const * string, uint64_t minimum, uint64_t maximum);
 *
 *   number.h
 *
 *   convert a numeric string to an unsigned integer; confirm that
 *   the result does not exceed the specified range; report errors
 *   and terminate the program on error;
 *
 *   Motley Tools by Charles Maier;
 *   Copyright (c) 2001-2006 by Charles Maier Associates;
 *   Licensed under the Internet Software Consortium License;
 *
 *--------------------------------------------------------------------*/

#ifndef UINTSPEC_SOURCE
#define UINTSPEC_SOURCE

#include <stdlib.h>
#include <inttypes.h>
#include <ctype.h>
#include <errno.h>

#include "../tools/number.h"
#include "../tools/error.h"
#include "../tools/types.h"

uint64_t uintspec (char const * string, uint64_t minimum, uint64_t maximum)

{
	char const * number = string;
	unsigned radix = RADIX_DEC;
	uint64_t value = 0;
	unsigned digit;
	if (*number == '0')
	{
		number++;
		if ((*number == 'b') || (*number == 'B'))
		{
			radix = RADIX_BIN;
			number++;
		}
		else if ((*number == 'x') || (*number == 'X'))
		{
			radix = RADIX_HEX;
			number++;
		}
	}
	while ((digit = todigit (*number)) < radix)
	{
		value *= radix;
		value += digit;
		number++;
	}
	if (*number)
	{
		error (1, EINVAL, "Have '%s' but want base %d integer", string, radix);
	}
	if ((value < minimum) || (value > maximum))
	{
		error (1, ERANGE, "Have %s but want %" PRId64 " thru %" PRId64, string, minimum, maximum);
	}
	return (value);
}


#endif