mirror of
https://github.com/quizhizhe/LiteLoaderBDS-1.16.40.git
synced 2025-06-07 12:18:11 +00:00
70 lines
2.0 KiB
C++
70 lines
2.0 KiB
C++
#ifndef SRC_BASE64_H_
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#define SRC_BASE64_H_
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#if defined(NODE_WANT_INTERNALS) && NODE_WANT_INTERNALS
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#include "util.h"
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#include <cmath>
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#include <cstddef>
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#include <cstdint>
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namespace node {
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//// Base 64 ////
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enum class Base64Mode {
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NORMAL,
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URL
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};
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static constexpr char base64_table[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
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"abcdefghijklmnopqrstuvwxyz"
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"0123456789+/";
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static constexpr char base64_table_url[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
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"abcdefghijklmnopqrstuvwxyz"
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"0123456789-_";
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static inline const char* base64_select_table(Base64Mode mode) {
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switch (mode) {
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case Base64Mode::NORMAL: return base64_table;
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case Base64Mode::URL: return base64_table_url;
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default: UNREACHABLE();
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}
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}
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static inline constexpr size_t base64_encoded_size(
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size_t size,
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Base64Mode mode = Base64Mode::NORMAL) {
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return mode == Base64Mode::NORMAL ? ((size + 2) / 3 * 4)
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: static_cast<size_t>(std::ceil(
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static_cast<double>(size * 4) / 3));
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}
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// Doesn't check for padding at the end. Can be 1-2 bytes over.
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static inline constexpr size_t base64_decoded_size_fast(size_t size) {
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// 1-byte input cannot be decoded
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return size > 1 ? (size / 4) * 3 + (size % 4 + 1) / 2 : 0;
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}
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inline uint32_t ReadUint32BE(const unsigned char* p);
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template <typename TypeName>
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size_t base64_decoded_size(const TypeName* src, size_t size);
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template <typename TypeName>
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size_t base64_decode(char* const dst, const size_t dstlen,
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const TypeName* const src, const size_t srclen);
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inline size_t base64_encode(const char* src,
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size_t slen,
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char* dst,
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size_t dlen,
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Base64Mode mode = Base64Mode::NORMAL);
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} // namespace node
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#endif // defined(NODE_WANT_INTERNALS) && NODE_WANT_INTERNALS
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#endif // SRC_BASE64_H_
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