Determines the number of bytes (expressed as a 32-bit integer) that are available for reading beyond the current read-write pointer in a specified file or socket.
#include <prio.h> PRInt32 PR_Available(PRFileDesc *fd);
The function has the following parameter:
- Pointer to a
PRFileDescobject representing a file or socket.
The function returns one of the following values:
- If the function completes successfully, it returns the number of bytes that are available for reading. For a normal file, these are the bytes beyond the current file pointer.
- If the function fails, it returns the value -1. The error code can then be retrieved via
PR_Available works on normal files and sockets.
PR_Available does not work with pipes on Win32 platforms.
If the number of bytes available for reading is out of the range of a 32-bit integer, use