1/*
2 * Copyright (C) 2016 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#include "protobuf.h"
18
19uint8_t*
20write_raw_varint(uint8_t* buf, uint32_t val)
21{
22    uint8_t* p = buf;
23    while (true) {
24        if ((val & ~0x7F) == 0) {
25            *p++ = (uint8_t)val;
26            return p;
27        } else {
28            *p++ = (uint8_t)((val & 0x7F) | 0x80);
29            val >>= 7;
30        }
31    }
32}
33
34uint8_t*
35write_length_delimited_tag_header(uint8_t* buf, uint32_t fieldId, size_t size)
36{
37    buf = write_raw_varint(buf, (fieldId << 3) | 2);
38    buf = write_raw_varint(buf, size);
39    return buf;
40}
41
42