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StringUtil: Speed up EncodeHex()/append_hex()

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This commit is contained in:
Stenzek
2024-09-18 21:42:46 +10:00
parent 401295ebdb
commit 369599202c
4 changed files with 48 additions and 12 deletions
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17
src/common/string_util.cpp
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@ -169,13 +169,20 @@ std::optional<std::vector<u8>> StringUtil::DecodeHex(const std::string_view in)
return {data};
}
std::string StringUtil::EncodeHex(const u8* data, int length)
std::string StringUtil::EncodeHex(const void* data, size_t length)
{
std::stringstream ss;
for (int i = 0; i < length; i++)
ss << std::hex << std::setfill('0') << std::setw(2) << static_cast<int>(data[i]);
static constexpr auto hex_char = [](char x) { return (x >= 0xA) ? ((x - 0xA) + 'a') : (x + '0'); };
return ss.str();
const u8* bytes = static_cast<const u8*>(data);
std::string ret;
ret.reserve(length * 2);
for (size_t i = 0; i < length; i++)
{
ret.push_back(hex_char(bytes[i] >> 4));
ret.push_back(hex_char(bytes[i] & 0xF));
}
return ret;
}
std::string_view StringUtil::StripWhitespace(const std::string_view str)