WCSTOULL(3) NEWLIB WCSTOULL(3)NAME
2.44 `wcstoull'--wide string to unsigned long long
SYNOPSIS
#include <wchar.h>
unsigned long long wcstoull(const wchar_t *S, wchar_t **PTR,
int BASE);
unsigned long long _wcstoull_r(void *REENT, const wchar_t *S,
wchar_t **PTR, int BASE);
DESCRIPTION
The function `wcstoull' converts the wide string `*S' to an `unsigned
long long'. First, it breaks down the string into three parts: leading
whitespace, which is ignored; a subject string consisting of the digits
meaningful in the radix specified by BASE (for example, `0' through `7'
if the value of BASE is 8); and a trailing portion consisting of one or
more unparseable characters, which always includes the terminating null
character. Then, it attempts to convert the subject string into an
unsigned long long integer, and returns the result.
If the value of BASE is zero, the subject string is expected to look
like a normal C integer constant: an optional sign (`+' or `-'), a
possible `0x' indicating hexadecimal radix or a possible <0> indicating
octal radix, and a number. If BASE is between 2 and 36, the expected
form of the subject is a sequence of digits (which may include letters,
depending on the base) representing an integer in the radix specified
by BASE. The letters `a'-`z' (or `A'-`Z') are used as digits valued
from 10 to 35. If BASE is 16, a leading `0x' is permitted.
The subject sequence is the longest initial sequence of the input
string that has the expected form, starting with the first non-white‐
space character. If the string is empty or consists entirely of white‐
space, or if the first non-whitespace character is not a permissible
digit, the subject string is empty.
If the subject string is acceptable, and the value of BASE is zero,
`wcstoull' attempts to determine the radix from the input string. A
string with a leading `0x' is treated as a hexadecimal value; a string
with a leading `0' and no `x' is treated as octal; all other strings
are treated as decimal. If BASE is between 2 and 36, it is used as the
conversion radix, as described above. Finally, a pointer to the first
character past the converted subject string is stored in PTR, if PTR is
not `NULL'.
If the subject string is empty (that is, if `*'S does not start with
a substring in acceptable form), no conversion is performed and the
value of S is stored in PTR (if PTR is not `NULL').
The alternate function `_wcstoull_r' is a reentrant version. The
extra argument REENT is a pointer to a reentrancy structure.
RETURNS
`wcstoull' returns `0' and sets `errno' to `EINVAL' if the value of
BASE is not supported.
`wcstoull' returns the converted value, if any. If no conversion was
made, `0' is returned.
`wcstoull' returns `ULLONG_MAX' if the magnitude of the converted
value is too large, and sets `errno' to `ERANGE'.
PORTABILITY
`wcstoull' is ANSI.
`wcstoull' requires no supporting OS subroutines.
SEE ALSOwcstoull is part of the library. The full documentation for is main‐
tained as a Texinfo manual. If info and are properly installed at your
site, the command
info
will give you access to the complete manual.
NEWLIB April 2010 WCSTOULL(3)
