getwc

Gets the next wide character from a stream.

Library:LibC
Classification:ANSI
Service:Characters and Strings

Syntax

  #include <wchar.h> 
   
  wint_t   getwc (
     struct _iobuf   *fp);

Parameters

fp

(IN) Points to the file.

Return Values

If successful, returns the next wide character, converted to a wint_t, from the input stream. Otherwise, if the stream is at end-of-file, returns EOF and sets the EOF indicator. If a read error occurs, returns EOF, sets the error indicator, and sets errno to one of the following:

Decimal

Constant

Description

4

EBADF

The file descriptor is not valid for reading.

5

ENOMEM

Insufficient storage space is available.

24

EAGAIN

The O_NONBLOCK flag is set for the file descriptor, and the process cannot immediately perform the read operation.

25

ENXIO

A request was made to a nonexistent device, or the request was outside the capabilities of the device.

28

EIO

The process is orphaned and cannot write to the file.

63

EINTR

A signal interrupted the read operation.

81

EOVERFLOW

The file is a regular file and an attempt was made to read at or beyond the offset maximum associated with the corresponding stream.

101

EILSEQ

A wide-character code does not correspond to a valid sequence.

Remarks

The getwc function gets the next character from the file designated by fp. The character is returned as an wint_t value.

See Also