NAME
wcstoimax(), wcstoumax() — convert wide character string to long integer
SYNOPSIS
#include <inttypes.h>
intmax_t wcstoimax(const wchar_t *__restrict nptr, wchar_t **__restrict endptr, int base);
uintmax_t wcstoumax(const wchar_t *__restrict nptr, wchar_t **__restrict endptr,
int base);
DESCRIPTION
wcstoimax()
or
wcstoumax()
converts the wide character string pointed to by
nptr
to
intmax_t
or
uintmax_t
representation, respectively.
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:
- wcstoimax()
returns
INTMAX_MAX
or
INTMAX_MIN
(according to the sign of the value), and sets
errno
to
ERANGE,
- wcstoumax()
returns
UINTMAX_MAX
and sets
errno
to
ERANGE.
For all other errors, zero is returned and
errno
is set to indicate the error.
ERRORS
wcstoimax()
and
wcstoumax()
fail and
errno
is set, if any of the following conditions are encountered:
- EINVAL
The value of
base
is not supported.
- ERANGE
The value to be returned would have caused overflow.
AUTHOR
wcstoimax()
and
wcstoumax()
were developed by HP.
STANDARDS CONFORMANCE
wcstoimax(): C99
wcstoumax(): C99
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