/*
* %CopyrightBegin%
*
* Copyright Ericsson AB 1998-2016. All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* %CopyrightEnd%
*/
#include <string.h>
#include <limits.h>
#include "eidef.h"
#include "eiext.h"
#include "putget.h"
int ei_encode_string(char *buf, int *index, const char *p)
{
size_t len = strlen(p);
if (len >= INT_MAX) return -1;
return ei_encode_string_len(buf, index, p, len);
}
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;
}
