fgetwc()
QNX SDP8.0C Library ReferenceAPIDeveloper
Read a wide character from a stream
Synopsis:
#include <wchar.h>
wint_t fgetwc( FILE * fp );
Arguments:
- fp
- The stream from which you want to read a character.
Library:
libc
Use the -l c option to qcc to link against this library. This library is usually included automatically.
Description:
The fgetwc() function reads the next wide character from the stream specified by fp.
Returns:
- If successful, fgetwc() returns the next character from fp, cast as (wint_t)(wchar_t).
- If the end-of-file indicator for the stream is set or the stream is at the end of the file, fgetwc() sets the end-of-file indicator and returns WEOF.
- If an error occurred, fgetwc() sets the error indicator for the stream, sets errno, and returns WEOF.
Errors:
- EAGAIN
- The O_NONBLOCK flag is set for fp and would have been blocked by this operation.
- EBADF
- The file descriptor for fp isn't valid for reading.
- EINTR
- A signal terminated the read operation; no data was transferred.
- EIO
- Either a physical I/O error has occurred, or the process is in the background and is being ignored or blocked.
- EOVERFLOW
- Cannot read at or beyond the offset maximum for this stream.
Classification:
Safety: | |
---|---|
Cancellation point | Yes |
Signal handler | No |
Thread | Yes |
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