blob: fc7fdf33a2580b66f5f48fe9dc0b065a0036e16a (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
|
#pragma once
#ifdef __GNUC__
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wunused-parameter"
#endif
//===--- Base64.h - Base64 Encoder/Decoder ----------------------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// This file provides generic base64 encoder/decoder.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_SUPPORT_BASE64_H
#define LLVM_SUPPORT_BASE64_H
#include <string>
namespace llvm {
template <class InputBytes> std::string encodeBase64(InputBytes const &Bytes) {
static const char Table[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
"abcdefghijklmnopqrstuvwxyz"
"0123456789+/";
std::string Buffer;
Buffer.resize(((Bytes.size() + 2) / 3) * 4);
size_t i = 0, j = 0;
for (size_t n = Bytes.size() / 3 * 3; i < n; i += 3, j += 4) {
uint32_t x = ((unsigned char)Bytes[i] << 16) |
((unsigned char)Bytes[i + 1] << 8) |
(unsigned char)Bytes[i + 2];
Buffer[j + 0] = Table[(x >> 18) & 63];
Buffer[j + 1] = Table[(x >> 12) & 63];
Buffer[j + 2] = Table[(x >> 6) & 63];
Buffer[j + 3] = Table[x & 63];
}
if (i + 1 == Bytes.size()) {
uint32_t x = ((unsigned char)Bytes[i] << 16);
Buffer[j + 0] = Table[(x >> 18) & 63];
Buffer[j + 1] = Table[(x >> 12) & 63];
Buffer[j + 2] = '=';
Buffer[j + 3] = '=';
} else if (i + 2 == Bytes.size()) {
uint32_t x =
((unsigned char)Bytes[i] << 16) | ((unsigned char)Bytes[i + 1] << 8);
Buffer[j + 0] = Table[(x >> 18) & 63];
Buffer[j + 1] = Table[(x >> 12) & 63];
Buffer[j + 2] = Table[(x >> 6) & 63];
Buffer[j + 3] = '=';
}
return Buffer;
}
} // end namespace llvm
#endif
#ifdef __GNUC__
#pragma GCC diagnostic pop
#endif
|
