Character array conversion to integer value of type unsigned long int.

This function is compatible with the following targets:

ANSI

BeOS

EMB/RTOS

Mac OS

Palm OS

Win32

unsigned long int strtoul(const char *nptr,

Parameters for this facility are:

nptr	const char *	A Null terminated array to convert
endptr	char **	A pointer to a position in nptry that is not convertible.
base	int	A numeric base between 2 and 36

The strtoul() function converts a character array, pointed to by nptr, to an integer value of type unsigned long int, in base. A plus or minus sign prefix is ignored.

The base argument in strtoul() specifies the base used for conversion. It must have a value between 2 and 36, or 0. If base is 0, then strtol() and strtoul() convert the character array based on its format. Character arrays beginning with'0' are assumed to be octal, number strings beginning with'0x' or'0X' are assumed to be hexadecimal. All other number strings are assumed to be decimal.

If the endptr argument is not a null pointer, it is assigned a pointer to a position within the character array pointed to by nptr. This position marks the first character that is not convertible to the functions' respective types.

This function skips leading white space.

This function sets the global variable errno to ERANGE if there is a conversion error.

strtoul() returns an unsigned integer value of type unsigned long int. If the converted value is greater than ULONG_MAX, strtoul() returns ULONG_MAX and sets errno to ERANGE. The ULONG_MAX macro is defined in limits.h

"strtod"

"strtol"

"errno"

"Integral type limits"

"Overview of math.h"

Refer to "Example of strtol(), strtoul(), strtoll(), and strtoull() usage".