NAME

btowc — single byte to wide character conversion

SYNOPSIS

#include <stdio.h>
#include <wchar.h>

wint_t btowc(int c);

DESCRIPTION

[CX] The functionality described on this reference page is aligned with the ISO C standard. Any conflict between the requirements described here and the ISO C standard is unintentional. This volume of IEEE Std 1003.1-2001 (“POSIX.1”) defers to the ISO C standard.

The btowc () function shall determine whether c constitutes a valid (one-byte) character in the initial shift state.

The behavior of this function shall be affected by the LC_CTYPE category of the current locale.

RETURN VALUE

The btowc () function shall return WEOF if c has the value EOF or if (unsigned char) c does not constitute a valid (one-byte) character in the initial shift state. Otherwise, it shall return the wide-character representation of that character.

ERRORS

No errors are defined.

The following sections are informative.

EXAMPLES

None.

APPLICATION USAGE

None.

RATIONALE

None.

FUTURE DIRECTIONS

None.

SEE ALSO

wctob(3) , the Base Definitions volume of IEEE Std 1003.1-2001 (“POSIX.1”), <wchar.h>

CHANGE HISTORY

First released in Issue 5. Included for alignment with ISO/IEC 9899/AMD1:1995 (“ISO C90, Amendment 1”) (E).

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