node/src/base64.h at optional-debug-handler · codebytere/node

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#ifndef SRC_BASE64_H_

#define SRC_BASE64_H_

#if defined(NODE_WANT_INTERNALS) && NODE_WANT_INTERNALS

#include "util.h"

#include <cmath>

#include <cstddef>

#include <cstdint>

namespace node {

//// Base 64 ////

enum class Base64Mode {

NORMAL,

URL

};

static inline constexpr size_t base64_encoded_size(

size_t size,

Base64Mode mode = Base64Mode::NORMAL) {

return mode == Base64Mode::NORMAL ? ((size + 2) / 3 * 4)

: static_cast<size_t>(std::ceil(

static_cast<double>(size * 4) / 3));

}

// Doesn't check for padding at the end. Can be 1-2 bytes over.

static inline constexpr size_t base64_decoded_size_fast(size_t size) {

// 1-byte input cannot be decoded

return size > 1 ? (size / 4) * 3 + (size % 4 + 1) / 2 : 0;

}

inline uint32_t ReadUint32BE(const unsigned char* p);

template <typename TypeName>

size_t base64_decoded_size(const TypeName* src, size_t size);

template <typename TypeName>

size_t base64_decode(char* const dst,

const size_t dstlen,

const TypeName* const src,

const size_t srclen);

} // namespace node

#endif // defined(NODE_WANT_INTERNALS) && NODE_WANT_INTERNALS

#endif // SRC_BASE64_H_