The R13B03 release.OTP_R13B03

1 files changed, 84 insertions, 0 deletions

diff --git a/lib/erl_interface/src/encode/encode_big.c b/lib/erl_interface/src/encode/encode_big.c
new file mode 100644
index 0000000000..25abf424b7
--- /dev/null
+++ b/lib/erl_interface/src/encode/encode_big.c
@@ -0,0 +1,84 @@
+/*
+ * %CopyrightBegin%
+ * 
+ * Copyright Ericsson AB 2009. All Rights Reserved.
+ * 
+ * The contents of this file are subject to the Erlang Public License,
+ * Version 1.1, (the "License"); you may not use this file except in
+ * compliance with the License. You should have received a copy of the
+ * Erlang Public License along with this software. If not, it can be
+ * retrieved online at http://www.erlang.org/.
+ * 
+ * Software distributed under the License is distributed on an "AS IS"
+ * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+ * the License for the specific language governing rights and limitations
+ * under the License.
+ * 
+ * %CopyrightEnd%
+ */
+
+#include <string.h>
+#include "eidef.h"
+#include "eiext.h"
+#include "putget.h"
+#include "ei_x_encode.h"
+
+int ei_encode_big(char *buf, int *index, erlang_big* big) {
+    unsigned char *s = (unsigned char *)buf + *index;
+    unsigned char *s0 = s;
+    unsigned int digit_bytes = big->arity;
+    unsigned int n = (digit_bytes+1)/2;
+
+    if (digit_bytes < 256) {
+	if (buf) {
+	    put8(s, ERL_SMALL_BIG_EXT);
+	    put8(s, digit_bytes);
+	} else {
+	    s += 2;
+	}
+    } else {
+	if (buf) {
+	    put8(s, ERL_LARGE_BIG_EXT);
+	    put32be(s, digit_bytes);
+	} else {
+	    s += 5;
+	}
+    }
+      
+    if (buf) {
+	int i;
+	unsigned char hi, lo;
+	unsigned short *dt = big->digits;
+	put8(s, big->is_neg);
+
+	for (i = 0; i < n; ++i) {
+	    
+	    hi = (unsigned char) (dt[i] >> 8);
+	    lo = (unsigned char) (dt[i]);
+
+	    s[i*2] = lo;
+	    if ((i*2 + 1) < digit_bytes) {
+		s[i*2 + 1] = hi;
+	    }
+	}
+ 
+    } else {
+	s ++; /* skip sign bit */
+    }
+
+    s += digit_bytes;
+
+    *index += s-s0;
+
+    return 0;
+}
+
+int ei_x_encode_big(ei_x_buff* x, erlang_big* big) {
+     int i = x->index;
+
+     ei_encode_big(NULL, &i, big);
+     if (!x_fix_buff(x, i))
+        return -1;
+     return ei_encode_big(x->buff, &x->index, big);
+}
+