wcstol.3c (2010 09)

w
wcstol(3C) wcstol(3C)
NAME
wcstol( ), wcstoll( ), wcstoul( ), wcstoull( ) - convert wide character string to long integer
SYNOPSIS
#include <wchar.h>
long int wcstol(const wchar_t *__restrict nptr, wchar_t **__restrict
endptr, int base);
long long wcstoll(const wchar_t *__restrict nptr, wchar_t **__restrict
endptr, int base);
unsigned long int wcstoul(const wchar_t *__restrict nptr, wchar_t **__res-
trict endptr,
int base);
unsigned long long wcstoull(const wchar_t *__restrict nptr, wchar_t
**__restrict endptr,
int base);
Remarks
These functions are compliant with the XPG4 Worldwide Portability Interface wide-character formatting
functions. They parallel the 8-bit character formatting functions defined in strtol (3C).
DESCRIPTION
wcstol() or wcstoul() converts the wide character string pointed to by nptr to long int or
unsigned long int representation, respectively.
wcstoll() or wcstoull() converts the wide
character string pointed to by nptr to
long long or unsigned long long representation, respec-
tively. The wide character string is scanned up to the first wide character inconsistent with the base.
Leading "white-space" wide characters (as defined by
iswspace() in wctype (3C)) are ignored. If no
conversion can take place, zero is returned.
If base is greater than or equal to 2 and less than or equal to 36, it is used as the base for conversion.
After an optional leading sign, leading zeros are ignored, and
0x or 0X is ignored if base is 16.
If base is zero, the wide character string itself determines the base as follows: after an optional leading
sign, a leading zero indicates octal conversion; a leading
0x or 0X indicates hexadecimal conversion.
Otherwise, decimal conversion is used.
If the value of endptr is not
(wchar_t **)NULL, a pointer to the wide character terminating the scan
is returned in the location pointed to by endptr . If no integer can be formed, the location pointed to by
endptr is set to nptr , and zero is returned.
Definitions for these functions and the type
wchar_t are provided in the <wchar.h> header file.
EXTERNAL INFLUENCES
Locale
The
LC_CTYPE category determines how wide character codes are interpreted.
International Code Set Support
Single- and multi-byte character code sets are supported.
RETURN VALUE
Upon successful completion, both functions return the converted value, if any.
If the correct value would cause overflow:
wcstol() returns LONG_MAX or LONG_MIN (according to the sign of the value), and sets
errno to [ERANGE],
wcstoul() returns ULONG_MAX and sets errno to [ERANGE],
wcstoll() returns LLONG_MAX or LLONG_MIN (according to the sign of the value), and sets
errno to [ERANGE],
wcstoull() returns ULLONG_MAX and sets errno to [ERANGE].
For all other errors, zero is returned and
errno is set to indicate the error.
HP-UX 11i Version 3: September 2010 − 1 − Hewlett-Packard Company 1