1/*
2 * Copyright (C) 2017 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 <sstream>
18
19#include "netdutils/Slice.h"
20
21namespace android {
22namespace netdutils {
23namespace {
24
25// Convert one byte to a two character hexadecimal string
26const std::string toHex(uint8_t byte) {
27    const std::array<char, 16> kLookup = {
28        {'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f'}};
29    return {kLookup[byte >> 4], kLookup[byte & 0xf]};
30}
31
32}  // namespace
33
34std::string toString(const Slice s) {
35    return std::string(reinterpret_cast<char*>(s.base()), s.size());
36}
37
38std::string toHex(const Slice s, int wrap) {
39    Slice tail = s;
40    int count = 0;
41    std::stringstream ss;
42    while (!tail.empty()) {
43        uint8_t byte = 0;
44        extract(tail, byte);
45        ss << toHex(byte);
46        if ((++count % wrap) == 0) {
47            ss << "\n";
48        }
49        tail = drop(tail, 1);
50    }
51    return ss.str();
52}
53
54std::ostream& operator<<(std::ostream& os, const Slice& slice) {
55    return os << std::hex << "Slice[base: " << reinterpret_cast<void*>(slice.base())
56              << ", limit: " << reinterpret_cast<void*>(slice.limit()) << ", size: 0x"
57              << slice.size() << "]" << std::dec;
58}
59
60}  // namespace netdutils
61}  // namespace android
62