Read a string of wide characters from a stream
#include <wchar.h> wchar_t * fgetws( wchar_t * buf, int n, FILE * fp );
- A pointer to a buffer in which fgetws() can store the wide characters that it reads.
- The maximum number of characters to read.
- The stream from which to read the characters.
Use the -l c option to qcc to link against this library. This library is usually included automatically.
The fgetws() function reads a string of wide characters from the stream specified by fp, and stores them in the array specified by buf.
It stops reading wide characters when one of the following occurs:
- The end-of-file is reached.
- A newline ('\n') character is read.
- n-1 characters have been read.
The fgetws() function places a NUL at the end of the string.
Don't assume all strings have newline characters. A newline character isn't present when more than n-1 characters occur before the newline.
Also, a newline character might not appear as the last character in a file when the end-of-file is reached.
- Failure; the stream is at the end-of-file or an error occurred ( errno is set).
- The O_NONBLOCK flag is set for fp and would have been blocked by this operation.
- The file descriptor for fp isn't valid for reading.
- A signal terminated the read operation; no data was transferred.
- Either a physical I/O error has occurred, or the process is in the background and is being ignored or blocked.
- Cannot read at or beyond the offset maximum for this stream.
Last modified: 2013-12-23