strtoul(S)
strtoul --
convert a string to an unsigned long integer
Syntax
cc . . . -lc
#include <stdlib.h>
unsigned long strtoul (const char *sptr, char **eptr, int base)
Description
The strtoul routine converts a string to an unsigned
long integer. sptr points to the start of the string,
eptr points to the end of the string, and
base defines the input radix, for example, base 8 is
octal. base can be in the range of a value of zero to
36.
If base is a value of zero, then the string is assumed
to contain the key for the base. The string can start
with plus (+) or minus (-), or without a
sign. The next character, or the first if a sign is not
specified, specifies the input radix. If zero (0), then decimal
is assumed. If the character is either lowercase ``x'' or
``X'', then hexadecimal is assumed; otherwise, octal is
assumed.
Return values
On success, an unsigned long integer value for the string is
returned; otherwise, on overflow, errno is set to
ERANGE and the value of the ULONG_MAX
constant is returned.
If strtoul is give a base greater than 36
or less than 2, it returns 0 and sets errno to
EINVAL.
See also
strtod(S),
strtol(S)
Standards conformance
strtoul is an extension
developed and maintained by The SCO Group.
It is conformant with:
X/Open Portability Guide, Issue 3, 1989
;
IEEE POSIX Std 1003.1-1990 System Application Program Interface (API) [C Language] (ISO/IEC 9945-1)
;
and
ANSI X3.159-1989 Programming Language -- C
.
© 2003 Caldera International, Inc. All rights reserved.
SCO OpenServer Release 5.0.7 -- 11 February 2003