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authorErlang/OTP <[email protected]>2009-11-20 14:54:40 +0000
committerErlang/OTP <[email protected]>2009-11-20 14:54:40 +0000
commit84adefa331c4159d432d22840663c38f155cd4c1 (patch)
treebff9a9c66adda4df2106dfd0e5c053ab182a12bd /lib/erl_interface/src/encode/encode_string.c
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The R13B03 release.OTP_R13B03
Diffstat (limited to 'lib/erl_interface/src/encode/encode_string.c')
-rw-r--r--lib/erl_interface/src/encode/encode_string.c77
1 files changed, 77 insertions, 0 deletions
diff --git a/lib/erl_interface/src/encode/encode_string.c b/lib/erl_interface/src/encode/encode_string.c
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+++ b/lib/erl_interface/src/encode/encode_string.c
@@ -0,0 +1,77 @@
+/*
+ * %CopyrightBegin%
+ *
+ * Copyright Ericsson AB 1998-2009. 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"
+
+
+int ei_encode_string(char *buf, int *index, const char *p)
+{
+ return ei_encode_string_len(buf, index, p, strlen(p));
+}
+
+int ei_encode_string_len(char *buf, int *index, const char *p, int len)
+{
+ char *s = buf + *index;
+ char *s0 = s;
+ int i;
+
+ if (len == 0) {
+
+ if (!buf) {
+ s += 1;
+ } else {
+ put8(s,ERL_NIL_EXT);
+ }
+
+ } else if (len <= 0xffff) {
+
+ if (!buf) {
+ s += 3;
+ } else {
+ put8(s,ERL_STRING_EXT);
+ put16be(s,len);
+ memmove(s,p,len); /* unterminated string */
+ }
+ s += len;
+
+ } else {
+
+ if (!buf) {
+ s += 5 + (2*len) + 1;
+ } else {
+ /* strings longer than 65535 are encoded as lists */
+ put8(s,ERL_LIST_EXT);
+ put32be(s,len);
+
+ for (i=0; i<len; i++) {
+ put8(s,ERL_SMALL_INTEGER_EXT);
+ put8(s,p[i]);
+ }
+ put8(s,ERL_NIL_EXT);
+ }
+
+ }
+
+ *index += s-s0;
+
+ return 0;
+}
+