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Add some size and string encoding literals (#32)
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,103 @@ | ||
| #pragma once | ||
| #include "Common.hpp" | ||
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| namespace pwn::literals | ||
| { | ||
| constexpr static std::uint32_t | ||
| convert_substring_to_int(const char* str, int offset) | ||
| { | ||
| return static_cast<std::uint32_t>(str[offset] - '0') * 10 + static_cast<std::uint32_t>(str[offset + 1] - '0'); | ||
| } | ||
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| constexpr char key = convert_substring_to_int(__TIME__, 0) ^ convert_substring_to_int(__TIME__, 3) ^ | ||
| convert_substring_to_int(__TIME__, 6); | ||
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| /// | ||
| /// @brief Convenience wrapper to represent size in bytes | ||
| /// | ||
| /// @param x | ||
| /// @return usize | ||
| /// | ||
| auto constexpr | ||
| operator""_B(unsigned long long x) noexcept -> usize | ||
| { | ||
| return x; | ||
| } | ||
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| /// | ||
| /// @brief Convenience wrapper to represent size in kilobytes | ||
| /// | ||
| /// @param x | ||
| /// @return usize | ||
| /// | ||
| auto constexpr | ||
| operator""_KB(unsigned long long x) noexcept -> usize | ||
| { | ||
| return 1024 * x; | ||
| } | ||
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| /// | ||
| /// @brief Convenience wrapper to represent size in megabytes | ||
| /// | ||
| /// @param x | ||
| /// @return usize | ||
| /// | ||
| auto constexpr | ||
| operator""_MB(unsigned long long x) noexcept -> usize | ||
| { | ||
| return 1024 * 1024 * x; | ||
| } | ||
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| /// | ||
| /// @brief Convenience wrapper to represent size in gigabytes | ||
| /// | ||
| /// @param x | ||
| /// @return usize | ||
| /// | ||
| auto constexpr | ||
| operator""_GB(unsigned long long x) noexcept -> usize | ||
| { | ||
| return 1024 * 1024 * 1024 * x; | ||
| } | ||
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| /// | ||
| /// @brief Lightweight wrapper class to decode strings | ||
| /// | ||
| struct encoded_string | ||
| { | ||
| const std::string m_str {}; | ||
| constexpr const std::string | ||
| str() const noexcept | ||
| { | ||
| std::string b {m_str}; | ||
| for ( char i = 0; auto& c : b ) | ||
| c ^= key + (i++); | ||
| return b; | ||
| } | ||
| }; | ||
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| /// | ||
| /// @brief constexpr strings obfuscator | ||
| /// | ||
| /// @param str | ||
| /// @param t | ||
| /// @return constexpr encoded_string | ||
| /// | ||
| constexpr encoded_string | ||
| operator""_es(const char* str, std::size_t t) | ||
| { | ||
| return {[&str, &t]() | ||
| { | ||
| std::string b {str, t}; | ||
| for ( char i = 0; auto& c : b ) | ||
| c ^= key + (i++); | ||
| return b; | ||
| }()}; | ||
| } | ||
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| } // namespace pwn::literals |
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