StringUtilities.h

#pragma once
 
#include <xrpl/basics/Blob.h>
#include <xrpl/basics/strHex.h>
 
#include <boost/format.hpp>
#include <boost/utility/string_view.hpp>
 
#include <array>
#include <cstdint>
#include <optional>
#include <string>
 
namespace xrpl {
 
std::string
sqlBlobLiteral(Blob const& blob);
 
template <class Iterator>
std::optional<Blob>
strUnHex(std::size_t strSize, Iterator begin, Iterator end)
{
    static constexpr std::array<int, 256> const digitLookupTable = []() {
        std::array<int, 256> t{};
 
        for (auto& x : t)
            x = -1;
 
        for (int i = 0; i < 10; ++i)
            t['0' + i] = i;
 
        for (int i = 0; i < 6; ++i)
        {
            t['A' + i] = 10 + i;
            t['a' + i] = 10 + i;
        }
 
        return t;
    }();
 
    Blob out;
 
    out.reserve((strSize + 1) / 2);
 
    auto iter = begin;
 
    if (strSize & 1)
    {
        int c = digitLookupTable[*iter++];
 
        if (c < 0)
            return {};
 
        out.push_back(c);
    }
 
    while (iter != end)
    {
        int cHigh = digitLookupTable[*iter++];
 
        if (cHigh < 0)
            return {};
 
        int cLow = digitLookupTable[*iter++];
 
        if (cLow < 0)
            return {};
 
        out.push_back(static_cast<unsigned char>((cHigh << 4) | cLow));
    }
 
    return {std::move(out)};
}
 
inline std::optional<Blob>
strUnHex(std::string const& strSrc)
{
    return strUnHex(strSrc.size(), strSrc.cbegin(), strSrc.cend());
}
 
inline std::optional<Blob>
strViewUnHex(std::string_view strSrc)
{
    return strUnHex(strSrc.size(), strSrc.cbegin(), strSrc.cend());
}
 
struct parsedURL
{
    explicit parsedURL() = default;
 
    std::string scheme;
    std::string username;
    std::string password;
    std::string domain;
    std::optional<std::uint16_t> port;
    std::string path;
 
    bool
    operator==(parsedURL const& other) const
    {
        return scheme == other.scheme && domain == other.domain && port == other.port && path == other.path;
    }
};
 
bool
parseUrl(parsedURL& pUrl, std::string const& strUrl);
 
std::string
trim_whitespace(std::string str);
 
std::optional<std::uint64_t>
to_uint64(std::string const& s);
 
bool
isProperlyFormedTomlDomain(std::string_view domain);
 
}  // namespace xrpl