rckrdmrd
97f407c661
- Prefijo v2: MCH - TRACEABILITY-MASTER.yml creado - Listo para integracion como submodulo Workspace: v2.0.0 | SIMCO: v4.0.0
100 lines
2.5 KiB
C++
100 lines
2.5 KiB
C++
/*
|
|
* Copyright (c) Meta Platforms, Inc. and affiliates.
|
|
*
|
|
* This source code is licensed under the MIT license found in the
|
|
* LICENSE file in the root directory of this source tree.
|
|
*/
|
|
|
|
#pragma once
|
|
|
|
#include <string>
|
|
#include <string_view>
|
|
|
|
namespace facebook::react::jsinspector_modern {
|
|
|
|
namespace {
|
|
// Vendored from Folly
|
|
// https://github.com/facebook/folly/blob/v2024.07.08.00/folly/detail/base64_detail/Base64Scalar.h
|
|
constexpr char kBase64Charset[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
|
|
|
|
constexpr char kBase64URLCharset[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-_";
|
|
|
|
template <bool isURL>
|
|
struct Base64ScalarImpl {
|
|
static constexpr const char *kCharset = isURL ? kBase64URLCharset : kBase64Charset;
|
|
|
|
// 0, 1 or 2 bytes
|
|
static constexpr char *encodeTail(const char *f, const char *l, char *o)
|
|
{
|
|
if (f == l) {
|
|
return o;
|
|
}
|
|
|
|
std::uint8_t aaab = f[0];
|
|
std::uint8_t aaa = aaab >> 2;
|
|
*o++ = kCharset[aaa];
|
|
|
|
// duplicating some tail handling to try to do less jumps
|
|
if (l - f == 1) {
|
|
std::uint8_t b00 = aaab << 4 & 0x3f;
|
|
*o++ = kCharset[b00];
|
|
if constexpr (!isURL) {
|
|
*o++ = '=';
|
|
*o++ = '=';
|
|
}
|
|
return o;
|
|
}
|
|
|
|
// l - f == 2
|
|
std::uint8_t bbcc = f[1];
|
|
std::uint8_t bbb = ((aaab << 4) | (bbcc >> 4)) & 0x3f;
|
|
std::uint8_t cc0 = (bbcc << 2) & 0x3f;
|
|
*o++ = kCharset[bbb];
|
|
*o++ = kCharset[cc0];
|
|
if constexpr (!isURL) {
|
|
*o++ = '=';
|
|
}
|
|
return o;
|
|
}
|
|
|
|
static constexpr char *encode(const char *f, const char *l, char *o)
|
|
{
|
|
while ((l - f) >= 3) {
|
|
std::uint8_t aaab = f[0];
|
|
std::uint8_t bbcc = f[1];
|
|
std::uint8_t cddd = f[2];
|
|
|
|
std::uint8_t aaa = aaab >> 2;
|
|
std::uint8_t bbb = ((aaab << 4) | (bbcc >> 4)) & 0x3f;
|
|
std::uint8_t ccc = ((bbcc << 2) | (cddd >> 6)) & 0x3f;
|
|
std::uint8_t ddd = cddd & 0x3f;
|
|
|
|
o[0] = kCharset[aaa];
|
|
o[1] = kCharset[bbb];
|
|
o[2] = kCharset[ccc];
|
|
o[3] = kCharset[ddd];
|
|
|
|
f += 3;
|
|
o += 4;
|
|
}
|
|
|
|
return encodeTail(f, l, o);
|
|
}
|
|
};
|
|
|
|
// https://github.com/facebook/folly/blob/v2024.07.08.00/folly/detail/base64_detail/Base64Common.h#L24
|
|
constexpr std::size_t base64EncodedSize(std::size_t inSize)
|
|
{
|
|
return ((inSize + 2) / 3) * 4;
|
|
}
|
|
} // namespace
|
|
|
|
inline std::string base64Encode(const std::string_view s)
|
|
{
|
|
std::string res(base64EncodedSize(s.size()), '\0');
|
|
Base64ScalarImpl<false>::encode(s.data(), s.data() + s.size(), res.data());
|
|
return res;
|
|
}
|
|
|
|
} // namespace facebook::react::jsinspector_modern
|