[project @ 1998-12-02 13:17:09 by simonm]

[ghc-hetmet.git] / ghc / lib / std / cbits / inputReady.lc

diff --git a/ghc/lib/std/cbits/inputReady.lc b/ghc/lib/std/cbits/inputReady.lc
deleted file mode 100644 (file)
index 0aadd7d..0000000
--- a/ghc/lib/std/cbits/inputReady.lc
+++ /dev/null
@@ -1,93 +0,0 @@
-%
-% (c) The GRASP/AQUA Project, Glasgow University, 1994
-%
-\subsection[inputReady.lc]{hReady Runtime Support}
-
-\begin{code}
-
-/* select and supporting types is not */
-#ifndef _AIX
-#define NON_POSIX_SOURCE  
-#endif
-
-#include "rtsdefs.h"
-#include "stgio.h"
-
-#ifdef HAVE_SYS_TYPES_H
-#include <sys/types.h>
-#endif
-
-#ifdef _AIX 
-/* this is included from sys/types.h only if _BSD is defined. */
-/* Since it is not, I include it here. - andre */
-#include <sys/select.h>
-#endif
-
-#ifdef HAVE_UNISTD_H
-#include <unistd.h>
-#endif
-
-#ifdef HAVE_FCNTL_H
-#include <fcntl.h>
-#endif
-
-#ifdef HAVE_SYS_TIME_H
-#include <sys/time.h>
-#endif
-
-/*
- * inputReady(ptr, msecs) checks to see whether input is available
- * on the file object 'ptr', timing out after (approx.) 'msec' milliseconds.
- * Input meaning 'can I safely read at least a *character* from this file
- * object without blocking?'
- * 
- * If the file object has a non-empty buffer, the test is trivial. If not,
- * we select() on the (readable) file descriptor.
- *
- * Notice that for file descriptors connected to ttys in non-canonical mode
- * (i.e., it's buffered), inputReady will not return true until a *complete
- * line* can be read.
- */
-
-StgInt
-inputReady(ptr, msecs)
-StgForeignObj ptr;
-StgInt msecs;
-{
-    IOFileObject* fo = (IOFileObject*)ptr;
-    int c, fd, maxfd, ready;
-    fd_set rfd;
-    struct timeval tv;
-
-    if ( FILEOBJ_IS_EOF(fo) )
-       return 0;
-
-    if ( !FILEOBJ_BUFFER_EMPTY(fo) ) {
-          /* Don't look any further, there's stuff in the buffer */
-          return 1;
-    }
-
-    fd = fo->fd;
-
-    /* Now try to get a character */
-    FD_ZERO(&rfd);
-    FD_SET(fd, &rfd);
-    /* select() will consider the descriptor set in the range of 0 to (maxfd-1) */
-    maxfd = fd + 1;
-    tv.tv_sec  = msecs / 1000;
-    tv.tv_usec = msecs % 1000;
-    while ((ready = select(maxfd, &rfd, NULL, NULL, &tv)) < 0 ) {
-      if (errno != EINTR ) {
-               cvtErrno();
-               stdErrno();
-                ready = -1;
-               break;
-      }
-   }
-
-    /* 1 => Input ready, 0 => time expired  (-1 error) */
-    return (ready);
-
-}
-
-\end{code}