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Header only C++17 library to parse a string containing delimited key-value pairs into a map container including the feature to convert from std::string to std::wstring and vice-versa.

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SiddiqSoft/string2map

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string2map and string2vector

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Simple C++17 library to aid in the parsing of HTTP headers into a STL map-type container.

Objective

Convert the input string with the specified delimiters into a map of key-value pairs with the given input:

  • std::[w]string
  • Key delimiter (example: : , :, =, = )
  • Value delimiter (end of the key-value pair element, example: CRLF)
  • Destination output type for key/value: string or wstring.
  • Destination container type: map, multimap, unordered_map.

API

namespace siddiqsoft::string2map
{
    template <typename T, typename D = T, typename R = std::map<D, D>>
    R parse(T& src, const T& keyDelimiter, const T& valueDelimiter, const T& terminalDelimiter= T{}) noexcept(false)
}
typename Type Comment
T string or wstring Type of the source string
D string or wstring Type of the destination string (used in the container)
R map, unordered_map, multimap Generally type is container<D,D>
namespace siddiqsoft::string2vector
{
    template <typename T>
    std::vector<T> parse(const T& src, const T& keyDelimiter)
}
typename Type Comment
T string or wstring Type of the source string

Usage

Get it from nuget or you can submodule it.

#include <string>
#include <map>

#include "siddiqsoft/string2map.hpp"

TEST(parse, Test_string2map)
{
    std::string sampleStr{ "Host: duplicate\r\n"
                    "Host: hostname.com\r\n"
                    "Content-Type: text\r\n"
                    "Content-Length: 99\r\n\r\n" };

    auto kvmap= siddiqsoft::string2map::parse<string,  // input string
                                              wstring, // transform to wstring
                                              map<wstring,wstring> // destination container
                                             >(sampleStr);

    // We expect only 3 items even though there is a duplicate key in the source string.
    // The std::map container ensures unique keys.
    EXPECT_EQ(3, kvmap.size());
}


TEST(parse, Test_string2vector)
{
    std::string sampleStr{ "/a/b/c/d" };

    auto kv= siddiqsoft::string2vector::parse<string>(sampleStr);

    EXPECT_EQ(4, kv.size());
}

© 2020 Siddiq Software LLC. All rights reserved. Refer to LICENSE.

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Header only C++17 library to parse a string containing delimited key-value pairs into a map container including the feature to convert from std::string to std::wstring and vice-versa.

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