From 15318cad33835e4e2dc620d033e43cd930676cdd Mon Sep 17 00:00:00 2001
From: kergoth <kergoth>
Date: Fri, 25 Jan 2002 22:14:26 +0000
Subject: Initial revision

---
(limited to 'rsync/netint.c')

diff --git a/rsync/netint.c b/rsync/netint.c
new file mode 100644
index 0000000..71e3f9d
--- a/dev/null
+++ b/rsync/netint.c
@@ -0,0 +1,185 @@
+/*= -*- c-basic-offset: 4; indent-tabs-mode: nil; -*-
+ *
+ * librsync -- library for network deltas
+ * $Id$
+ * 
+ * Copyright (C) 1999, 2000, 2001 by Martin Pool <mbp@samba.org>
+ * Copyright (C) 1999 by Andrew Tridgell <tridge@samba.org>
+ * 
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public License
+ * as published by the Free Software Foundation; either version 2.1 of
+ * the License, or (at your option) any later version.
+ * 
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Lesser General Public License for more details.
+ * 
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+                            /*
+                             | Ummm, well, OK.  The network's the
+                             | network, the computer's the
+                             | computer.  Sorry for the confusion.
+                             |        -- Sun Microsystems
+                             */
+
+/*
+ * Network-byte-order output to the tube.
+ *
+ * All the `suck' routines return a result code.  The most common
+ * values are RS_DONE if they have enough data, or RS_BLOCKED if there
+ * is not enough input to proceed.
+ *
+ * All the netint operations are done in a fairly simpleminded way,
+ * since we don't want to rely on stdint types that may not be
+ * available on some platforms.
+ */
+
+/*
+ * TODO: If we don't have <stdint.h> (or perhaps even if we do),
+ * determine endianness and integer size by hand and use that to do
+ * our own conversion routines.  We possibly need this anyhow to do
+ * 64-bit integers, since there seems to be no ntohs() analog.
+ */
+
+#include <config_rsync.h>
+
+#include <assert.h>
+#include <sys/types.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+
+#include "rsync.h"
+
+#include "job.h"
+#include "netint.h"
+#include "trace.h"
+#include "stream.h"
+
+#define RS_MAX_INT_BYTES 8
+
+
+/**
+ * \brief Write a single byte to a stream output.
+ */
+rs_result
+rs_squirt_byte(rs_job_t *job, unsigned char d)
+{
+    rs_tube_write(job, &d, 1);
+    return RS_DONE;
+}
+
+
+/**
+ * \brief Write a variable-length integer to a stream.
+ *
+ * \param job Job of data.
+ *
+ * \param d Datum to write out.
+ *
+ * \param len Length of integer, in bytes.
+ */
+rs_result
+rs_squirt_netint(rs_job_t *job, rs_long_t d, int len)
+{
+    unsigned char       buf[RS_MAX_INT_BYTES];
+    int                 i, j;
+
+    if (len <= 0 || len > RS_MAX_INT_BYTES) {
+        rs_error("Illegal integer length %d", len);
+        return RS_INTERNAL_ERROR;
+    }
+
+    /* Fill the output buffer with a bigendian representation of the
+     * number. */
+    for (i = 0, j = len-1; i < len; i++, j--) {
+        buf[j] = d;             /* truncated */
+        d >>= 8;
+    }
+
+    rs_tube_write(job, buf, len);
+
+    return RS_DONE;
+}
+
+
+
+rs_result
+rs_squirt_n4(rs_job_t *job, int val)
+{
+    return rs_squirt_netint(job, val, 4);
+}
+
+
+
+rs_result
+rs_suck_netint(rs_job_t *job, rs_long_t *v, int len)
+{
+    unsigned char       *buf;
+    int                 i;
+    rs_result           result;
+
+    if (len <= 0 || len > RS_MAX_INT_BYTES) {
+        rs_error("Illegal integer length %d", len);
+        return RS_INTERNAL_ERROR;
+    }
+
+    if ((result = rs_scoop_read(job, len, (void **) &buf)) != RS_DONE)
+        return result;
+
+    *v = 0;
+
+    for (i = 0; i < len; i++) {
+        *v = *v<<8 | buf[i];
+    }
+
+    return RS_DONE;
+}
+
+
+rs_result
+rs_suck_byte(rs_job_t *job, unsigned char *v)
+{
+    void *inb;
+    rs_result result;
+    
+    if ((result = rs_scoop_read(job, 1, &inb)) == RS_DONE)
+        *v = *((unsigned char *) inb);
+
+    return result;
+}
+
+
+rs_result
+rs_suck_n4(rs_job_t *job, int *v)
+{
+    rs_result       result;
+    rs_long_t       d;
+
+    result = rs_suck_netint(job, &d, 4);
+    *v = d;
+    return result;
+}        
+
+
+int rs_int_len(rs_long_t val)
+{
+    if (!(val & ~0xffL))
+        return 1;
+    else if (!(val & ~0xffffL))
+        return 2;
+    else if (!(val & ~0xffffffffL))
+        return 4;
+    else if (!(val & ~0xffffffffffffffffL))
+        return 8;
+    else {
+        rs_fatal("can't encode integer %.0f yet", (double) val);
+    }
+}
+
--
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