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.
Syntax
#include <prio.h> PRInt64 PR_Available64(PRFileDesc *fd);
Parameter
The function has the following parameter:
fd
- Pointer to a
PRFileDesc
object representing a file or socket.
Returns
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_GetError
.
Description
PR_Available64
works on normal files and sockets. PR_Available
does not work with pipes on Win32 platforms.
See Also
If the number of bytes available for reading is within the range of a 32-bit integer, use PR_Available
.