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/*
* %CopyrightBegin%
*
* Copyright Ericsson AB 2002-2016. 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 "eidef.h"
#include "eiext.h"
#include "putget.h"
#include "ei_x_encode.h"
/*
* 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_ulonglong() 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_ulonglong(ei_x_buff* x, EI_ULONGLONG n)
{
int i = x->index;
ei_encode_ulonglong(NULL, &i, n);
if (!x_fix_buff(x, i))
return -1;
return ei_encode_ulonglong(x->buff, &x->index, n);
}
#ifdef EI_64BIT
int ei_encode_ulong(char *buf, int *index, unsigned long p)
{
return ei_encode_ulonglong(buf, index, p);
}
#endif
int ei_encode_ulonglong(char *buf, int *index, EI_ULONGLONG p)
{
char *s = buf + *index;
char *s0 = s;
if (p < 256) {
if (!buf) s += 2;
else {
put8(s,ERL_SMALL_INTEGER_EXT);
put8(s,(p & 0xff));
}
} else if (p <= ERL_MAX) {
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 */
if (buf) {
char *arityp;
int arity = 0;
put8(s,ERL_SMALL_BIG_EXT);
arityp = s++; /* fill in later */
put8(s, 0); /* save sign separately */
while (p) {
*s++ = p & 0xff; /* take lowest byte */
p >>= 8; /* shift unsigned */
arity++;
}
put8(arityp,arity);
} else {
s += 3; /* Type, arity and sign */
while (p) {
s++; /* take lowest byte */
p >>= 8; /* shift unsigned */
}
}
}
*index += s-s0;
return 0;
}
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