The R13B03 release.OTP_R13B03

1 files changed, 103 insertions, 0 deletions

diff --git a/lib/erl_interface/src/encode/encode_longlong.c b/lib/erl_interface/src/encode/encode_longlong.c
new file mode 100644
index 0000000000..aff24e2478
--- /dev/null
+++ b/lib/erl_interface/src/encode/encode_longlong.c
@@ -0,0 +1,103 @@
+/*
+ * %CopyrightBegin%
+ * 
+ * Copyright Ericsson AB 2002-2009. 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 "eidef.h"
+#include "eiext.h"
+#include "putget.h"
+#include "ei_x_encode.h"
+
+#define abs(p) (((p)<0) ? -(p) : p)
+
+/* long -> erl_integer */
+/* note that this is the only place where data is stored Little Endian */
+
+/*
+ * For some 64 bit operations on some operating systems code
+ * compiled with GNU cc depends on "libgcc" for some 64 bit
+ * operations missing in hardware (or because of gcc bugs).
+ * If user code was linked together with the ei lib
+ * using other linkers than GNU ld this may cause problems.
+ * We moved ei_x_encode_longlong() here from "ei_x_encode.c" 
+ * to limit this problem to users that actually use the ei
+ * longlong operations, not all ei_x users.
+ */
+int ei_x_encode_longlong(ei_x_buff* x, EI_LONGLONG n)
+{
+    int i = x->index;
+    ei_encode_longlong(NULL, &i, n);
+    if (!x_fix_buff(x, i))
+	return -1;
+    return ei_encode_longlong(x->buff, &x->index, n);
+}
+
+#ifdef EI_64BIT
+int ei_encode_long(char *buf, int *index, long p)
+{
+    return ei_encode_longlong(buf, index, p);
+}
+#endif
+
+int ei_encode_longlong(char *buf, int *index, EI_LONGLONG p)
+{
+    char *s = buf + *index;
+    char *s0 = s;
+
+    if ((p < 256) && (p >= 0)) {
+	if (!buf) s += 2;
+	else {
+	    put8(s,ERL_SMALL_INTEGER_EXT);
+	    put8(s,(p & 0xff));
+	}
+    } else if ((p <= ERL_MAX) && (p >= ERL_MIN)) {
+	/* FIXME: Non optimal, could use (p <= LONG_MAX) && (p >= LONG_MIN)
+	   and skip next case */
+	if (!buf) s += 5;
+	else {
+	    put8(s,ERL_INTEGER_EXT);
+	    put32be(s,p);
+	}
+    } else {
+	/* We know 28-64 bits needed, i.e four to eight bytes  */
+	EI_ULONGLONG up = abs(p); /* FIXME name uabs(x) not to confuse with abs */
+	if (buf) {
+	    char *arityp;
+	    int arity = 0;
+
+	    put8(s,ERL_SMALL_BIG_EXT);
+	    arityp = s++;	/* fill in later */
+	    put8(s, p < 0);            /* save sign separately */
+	    while (up) {
+		*s++ = up & 0xff; /* take lowest byte */
+		up >>= 8;	  /* shift unsigned */
+		arity++;
+	    }
+	    put8(arityp,arity);
+	} else {
+	    s += 3;		/* Type, arity and sign */
+	    while (up) {
+		s++;		/* take lowest byte */
+		up >>= 8;	/* shift unsigned */
+	    }
+	}
+    }
+  
+    *index += s-s0; 
+
+    return 0; 
+}
+