forked from boostorg/beast
Add HTTP field value parsers:
ext_list:
Iterable container of comma separated extensions, where each extension
is a token followed an optional list of semicolon delimited parameters,
with each parameter consisting of a name / value pair. The value can
be a token or quoted-string.
param_list:
Iterable container of semicolon delimited parameters, where each parameter
is a name / value pair. The value can be a token or quoted-string.
token_list
Iterable container of comma delimited tokens.
* Remove obsolete rfc2616 functions
* Refactor and consolidate case-insensitive string helpers
This commit is contained in:
Vinnie Falco
@@ -8,76 +8,96 @@
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#ifndef BEAST_DETAIL_CI_CHAR_TRAITS_HPP
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#define BEAST_DETAIL_CI_CHAR_TRAITS_HPP
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#include <boost/range/algorithm/equal.hpp>
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#include <boost/utility/string_ref.hpp>
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#include <algorithm>
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#include <type_traits>
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#include <cctype>
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#include <iterator>
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#include <string>
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#include <utility>
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#include <array>
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#include <cstdint>
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namespace beast {
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namespace detail {
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/** Case-insensitive function object for performing less than comparisons. */
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inline
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char
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tolower(char c)
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{
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static std::array<std::uint8_t, 256> constexpr tab = {{
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0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15,
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16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31,
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32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47,
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48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63,
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64, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111,
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112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 91, 92, 93, 94, 95,
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96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111,
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112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127,
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128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143,
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144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159,
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160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175,
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176, 177, 178, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 191,
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192, 193, 194, 195, 196, 197, 198, 199, 200, 201, 202, 203, 204, 205, 206, 207,
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208, 209, 210, 211, 212, 213, 214, 215, 216, 217, 218, 219, 220, 221, 222, 223,
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224, 225, 226, 227, 228, 229, 230, 231, 232, 233, 234, 235, 236, 237, 238, 239,
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240, 241, 242, 243, 244, 245, 246, 247, 248, 249, 250, 251, 252, 253, 254, 255
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}};
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return static_cast<char>(tab[static_cast<std::uint8_t>(c)]);
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}
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template<std::size_t N>
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inline
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boost::string_ref
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string_helper(const char (&s)[N])
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{
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return boost::string_ref{s, N-1};
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}
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template<class T>
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inline
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T const&
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string_helper(T const& t)
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{
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return t;
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}
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// Case-insensitive less
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struct ci_less
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{
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static bool const is_transparent = true;
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template<class S1, class S2>
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bool
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operator()(boost::string_ref const& lhs,
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boost::string_ref const& rhs) const noexcept
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operator()(S1 const& lhs, S2 const& rhs) const noexcept
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{
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using std::begin;
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using std::end;
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auto const s1 = string_helper(lhs);
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auto const s2 = string_helper(rhs);
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return std::lexicographical_compare(
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begin(lhs), end(lhs), begin(rhs), end(rhs),
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begin(s1), end(s1), begin(s2), end(s2),
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[](char lhs, char rhs)
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{
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return std::tolower(lhs) < std::tolower(rhs);
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return tolower(lhs) < tolower(rhs);
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}
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);
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}
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};
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inline
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// Case-insensitive equal
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struct ci_equal_pred
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{
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bool
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operator()(char c1, char c2) const noexcept
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{
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return tolower(c1) == tolower(c2);
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}
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};
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// Case-insensitive equal
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template<class S1, class S2>
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bool
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ci_equal(std::pair<const char*, std::size_t> lhs,
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std::pair<const char*, std::size_t> rhs)
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ci_equal(S1 const& lhs, S2 const& rhs)
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{
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if(lhs.second != rhs.second)
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return false;
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return std::equal (lhs.first, lhs.first + lhs.second,
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rhs.first,
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[] (char lhs, char rhs)
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{
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return std::tolower(lhs) == std::tolower(rhs);
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}
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);
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}
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template <size_t N>
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inline
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std::pair<const char*, std::size_t>
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view(const char (&s)[N])
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{
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return {s, N-1};
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}
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inline
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std::pair<const char*, std::size_t>
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view(std::string const& s)
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{
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return {s.data(), s.size()};
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}
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/** Returns `true` if strings are case-insensitive equal. */
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template <class String1, class String2>
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inline
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bool
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ci_equal(String1 const& lhs, String2 const& rhs)
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{
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return ci_equal(view(lhs), view(rhs));
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return boost::range::equal(
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string_helper(lhs), string_helper(rhs),
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ci_equal_pred{});
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}
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} // detail
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