1 files changed, 118 insertions, 0 deletions
diff --git a/third_party/heimdal/lib/roken/net_read.c b/third_party/heimdal/lib/roken/net_read.c
new file mode 100644
index 0000000..df1ac53
--- /dev/null
+++ b/third_party/heimdal/lib/roken/net_read.c
@@ -0,0 +1,118 @@
+/*
+ * Copyright (c) 1995, 1996, 1997, 1998 Kungliga Tekniska Högskolan
+ * (Royal Institute of Technology, Stockholm, Sweden).
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * 3. Neither the name of the Institute nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <config.h>
+
+#include "roken.h"
+
+/*
+ * Like read but never return partial data.
+ */
+
+#ifndef _WIN32
+
+ROKEN_LIB_FUNCTION ssize_t ROKEN_LIB_CALL
+net_read (rk_socket_t fd, void *buf, size_t nbytes)
+{
+    char *cbuf = (char *)buf;
+    ssize_t count;
+    size_t rem = nbytes;
+
+    while (rem > 0) {
+	count = read (fd, cbuf, rem);
+	if (count < 0) {
+	    if (errno == EINTR)
+		continue;
+	    else
+		return count;
+	} else if (count == 0) {
+	    return count;
+	}
+	cbuf += count;
+	rem -= count;
+    }
+    return nbytes;
+}
+
+#else
+
+ROKEN_LIB_FUNCTION ssize_t ROKEN_LIB_CALL
+net_read(rk_socket_t sock, void *buf, size_t nbytes)
+{
+    char *cbuf = (char *)buf;
+    ssize_t count;
+    size_t rem = nbytes;
+
+#ifdef SOCKET_IS_NOT_AN_FD
+    int use_read = 0;
+#endif
+
+    while (rem > 0) {
+#ifdef SOCKET_IS_NOT_AN_FD
+	if (use_read)
+	    count = _read (sock, cbuf, rem);
+	else
+	    count = recv (sock, cbuf, rem, 0);
+
+	if (use_read == 0 &&
+	    rk_IS_SOCKET_ERROR(count) &&
+            (rk_SOCK_ERRNO == WSANOTINITIALISED ||
+             rk_SOCK_ERRNO == WSAENOTSOCK)) {
+	    use_read = 1;
+
+	    count = _read (sock, cbuf, rem);
+	}
+#else
+	count = recv (sock, cbuf, rem, 0);
+#endif
+	if (count < 0) {
+
+	    /* With WinSock, the error EINTR (WSAEINTR), is used to
+	       indicate that a blocking call was cancelled using
+	       WSACancelBlockingCall(). */
+
+#ifndef HAVE_WINSOCK
+	    if (rk_SOCK_ERRNO == EINTR)
+		continue;
+#endif
+	    return count;
+	} else if (count == 0) {
+	    return count;
+	}
+	cbuf += count;
+	rem -= count;
+    }
+    return nbytes;
+}
+
+#endif