[project @ 1998-08-11 19:24:33 by sof]

[ghc-hetmet.git] / ghc / lib / misc / cbits / recvFrom.c

diff --git a/ghc/lib/misc/cbits/recvFrom.c b/ghc/lib/misc/cbits/recvFrom.c
new file mode 100644 (file)
index 0000000..c1e10df
--- /dev/null
+++ b/ghc/lib/misc/cbits/recvFrom.c
@@ -0,0 +1,68 @@
+#if 0
+%
+% (c) The GRASP/AQUA Project, Glasgow University, 1998
+%
+\subsection[recvFrom.lc]{recvFrom run-time support}
+
+\begin{code}
+#endif
+
+#define NON_POSIX_SOURCE
+#include "rtsdefs.h"
+#include "ghcSockets.h"
+
+StgInt
+recvFrom__(fd, buf, nbytes, from)
+StgInt fd;
+StgAddr buf;
+StgInt nbytes;
+StgAddr from;
+{
+  StgInt count;
+  int sz;
+  int flags = 0;
+
+  sz = sizeof(struct sockaddr_in);
+
+  while ( (count = recvfrom((int)fd, (void*)buf, (int)nbytes, flags, (struct sockaddr*)from, &sz)) < 0) {
+      if (errno != EINTR) {
+         cvtErrno();
+         switch (ghc_errno) {
+         case GHC_EBADF:
+                     ghc_errtype = ERR_INVALIDARGUMENT;
+              ghc_errstr  = "Not a valid read descriptor";
+             break;
+         case GHC_EBADMSG:
+                     ghc_errtype = ERR_SYSTEMERROR;
+              ghc_errstr  = "Message waiting to be read is not a data message";
+             break;
+         case GHC_EFAULT:
+                     ghc_errtype = ERR_INVALIDARGUMENT;
+              ghc_errstr  = "Data buffer not in readable part of user address space";
+             break;
+         case GHC_EINVAL:
+             ghc_errtype = ERR_INVALIDARGUMENT;
+             ghc_errstr  = "Seek pointer associated with descriptor negative";
+             break;
+         case GHC_EIO:
+             ghc_errtype = ERR_SYSTEMERROR;
+             ghc_errstr  = "I/O error occurred while reading";
+             break;
+         case GHC_EISDIR:
+             ghc_errtype = ERR_INAPPROPRIATETYPE;
+             ghc_errstr  = "Descriptor refers to a directory";
+             break;
+         case GHC_EAGAIN:
+         case GHC_EWOULDBLOCK:
+             ghc_errtype = ERR_OTHERERROR;
+             ghc_errstr  = "No data could be read immediately";
+             break;
+         default:
+             stdErrno();
+             break;
+         }
+         return -1;
+      }
+    }
+    return count;
+}