wint_t getwc(FILE *stream);
If stream has a file position indicator,
On failure, errno is set to one of the following values:
Another process has the file locked.
stream is not a valid stream opened for reading.
The input is not a valid character code.
A signal interrupted the call.
An input error occurred.
The open object is a directory, not a file.
Memory could not be allocated for internal buffers.
A device error occurred.
The file is a regular file and an attempt was made to read at or beyond the offset maximum associated with the corresponding stream.
The underlying file descriptor is a non-blocking socket and no data is ready to be read.
ANSI/ISO 9899-1990/AM 1-1995.
If the stream is from a file open in text mode, the line-terminating character sequence of carriage return plus linefeed is translated to linefeed on input. No such translation occurs for files open in binary mode.
PTC MKS Toolkit for Professional Developers
PTC MKS Toolkit for Professional Developers 64-Bit Edition
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PTC MKS Toolkit 10.1 patch 1 Documentation Build 2.