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Add boost::uuids::from_chars

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This commit is contained in:
Peter Dimov
2025-12-21 20:53:46 +02:00
parent db6e2c5266
commit d6c401e62e
5 changed files with 337 additions and 0 deletions
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150
include/boost/uuid/detail/from_chars.hpp Normal file
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@@ -0,0 +1,150 @@
#ifndef BOOST_UUID_DETAIL_FROM_CHARS_HPP_INCLUDED
#define BOOST_UUID_DETAIL_FROM_CHARS_HPP_INCLUDED
// Copyright 2025 Peter Dimov
// Distributed under the Boost Software License, Version 1.0.
// https://www.boost.org/LICENSE_1_0.txt
#include <boost/uuid/uuid.hpp>
#include <boost/config.hpp>
namespace boost {
namespace uuids {
namespace detail {
constexpr char const* from_chars_digits( char const* ) noexcept
{
return "0123456789ABCDEFabcdef-";
}
constexpr wchar_t const* from_chars_digits( wchar_t const* ) noexcept
{
return L"0123456789ABCDEFabcdef-";
}
constexpr char16_t const* from_chars_digits( char16_t const* ) noexcept
{
return u"0123456789ABCDEFabcdef-";
}
constexpr char32_t const* from_chars_digits( char32_t const* ) noexcept
{
return U"0123456789ABCDEFabcdef-";
}
#if defined(__cpp_char8_t) && __cpp_char8_t >= 201811L
constexpr char8_t const* from_chars_digits( char8_t const* ) noexcept
{
return u8"0123456789ABCDEFabcdef-";
}
#endif
template<class Ch>
BOOST_CXX14_CONSTEXPR inline
unsigned char from_chars_digit_value( Ch ch )
{
constexpr Ch const* digits = detail::from_chars_digits( static_cast<Ch const*>( nullptr ) );
std::size_t i = 0;
for( ; i < 16; ++i )
{
if( digits[ i ] == ch ) return static_cast< unsigned char >( i );
}
for( ; i < 22; ++i )
{
if( digits[ i ] == ch ) return static_cast< unsigned char >( i - 6 );
}
return 255;
}
template<class Ch>
BOOST_CXX14_CONSTEXPR inline
unsigned char from_chars_is_dash( Ch ch )
{
constexpr Ch const* digits = detail::from_chars_digits( static_cast<Ch const*>( nullptr ) );
return ch == digits[ 22 ];
}
} // namespace detail
enum class from_chars_error
{
none = 0,
unexpected_end_of_input,
hex_digit_expected,
dash_expected
};
template<class Ch> struct from_chars_result
{
Ch const* ptr;
from_chars_error ec;
};
template<class Ch>
BOOST_CXX14_CONSTEXPR inline
from_chars_result<Ch> from_chars( Ch const* first, Ch const* last, uuid& u ) noexcept
{
u = {};
for( std::size_t i = 0; i < 16; ++i )
{
if( first == last )
{
return { first, from_chars_error::unexpected_end_of_input };
}
unsigned char v1 = detail::from_chars_digit_value( *first );
if( v1 == 255 )
{
return { first, from_chars_error::hex_digit_expected };
}
++first;
if( first == last )
{
return { first, from_chars_error::unexpected_end_of_input };
}
unsigned char v2 = detail::from_chars_digit_value( *first );
if( v2 == 255 )
{
return { first, from_chars_error::hex_digit_expected };
}
++first;
u.data()[ i ] = static_cast<unsigned char>( ( v1 << 4 ) + v2 );
if( i == 3 || i == 5 || i == 7 || i == 9 )
{
if( first == last )
{
return { first, from_chars_error::unexpected_end_of_input };
}
if( !detail::from_chars_is_dash( *first ) )
{
return { first, from_chars_error::dash_expected };
}
++first;
}
}
return { first, from_chars_error::none };
}
}} //namespace boost::uuids
#endif // BOOST_UUID_DETAIL_TO_CHARS_HPP_INCLUDED

1
include/boost/uuid/uuid_io.hpp
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@@ -8,6 +8,7 @@
#include <boost/uuid/uuid.hpp>
#include <boost/uuid/detail/to_chars.hpp>
#include <boost/uuid/detail/from_chars.hpp>
#include <boost/uuid/detail/static_assert.hpp>
#include <boost/config.hpp>
#include <iosfwd>

4
test/Jamfile.v2
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@@ -91,9 +91,13 @@ run test_comparison.cpp : : : <define>BOOST_UUID_NO_SIMD <define>BOOST_UUID_REPO
run test_io.cpp
: : : <library>/boost/lexical_cast//boost_lexical_cast <library>/boost/predef//boost_predef -$(WERROR) ;
run test_io_2.cpp ;
run test_to_chars.cpp ;
run test_to_chars_2.cpp ;
run test_from_chars.cpp ;
run test_from_chars_2.cpp ;
# test uuid_clock
run test_uuid_clock.cpp ;

86
test/test_from_chars.cpp Normal file
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@@ -0,0 +1,86 @@
// Copyright 2025 Peter Dimov
// Distributed under the Boost Software License, Version 1.0.
// https://www.boost.org/LICENSE_1_0.txt
#include <boost/uuid/uuid.hpp>
#include <boost/uuid/uuid_io.hpp>
#include <boost/core/lightweight_test.hpp>
#include <string>
using namespace boost::uuids;
template<class Ch> void test( uuid const& expected, Ch const* str )
{
Ch const* first = str;
Ch const* last = first + std::char_traits<Ch>::length( first );
uuid u;
from_chars_result<Ch> r = from_chars( first, last, u );
BOOST_TEST_EQ( r.ptr, first + 36 );
BOOST_TEST( r.ec == from_chars_error::none );
BOOST_TEST_EQ( static_cast<int>( r.ec ), 0 );
BOOST_TEST_EQ( u, expected );
}
int main()
{
uuid const u1 = {{ 0 }};
test( u1, "00000000-0000-0000-0000-000000000000" );
test( u1, L"00000000-0000-0000-0000-000000000000" );
test( u1, u"00000000-0000-0000-0000-000000000000" );
test( u1, U"00000000-0000-0000-0000-000000000000" );
test( u1, u8"00000000-0000-0000-0000-000000000000" );
test( u1, "00000000-0000-0000-0000-000000000000-0000" );
test( u1, L"00000000-0000-0000-0000-000000000000-0000" );
test( u1, u"00000000-0000-0000-0000-000000000000-0000" );
test( u1, U"00000000-0000-0000-0000-000000000000-0000" );
test( u1, u8"00000000-0000-0000-0000-000000000000-0000" );
uuid const u2 = {{ 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f }};
test( u2, "00010203-0405-0607-0809-0a0b0c0d0e0f" );
test( u2, L"00010203-0405-0607-0809-0a0b0c0d0e0f" );
test( u2, u"00010203-0405-0607-0809-0a0b0c0d0e0f" );
test( u2, U"00010203-0405-0607-0809-0a0b0c0d0e0f" );
test( u2, u8"00010203-0405-0607-0809-0a0b0c0d0e0f" );
test( u2, "00010203-0405-0607-0809-0a0b0c0d0e0f1011" );
test( u2, L"00010203-0405-0607-0809-0a0b0c0d0e0f1011" );
test( u2, u"00010203-0405-0607-0809-0a0b0c0d0e0f1011" );
test( u2, U"00010203-0405-0607-0809-0a0b0c0d0e0f1011" );
test( u2, u8"00010203-0405-0607-0809-0a0b0c0d0e0f1011" );
test( u2, "00010203-0405-0607-0809-0A0B0C0D0E0F" );
test( u2, L"00010203-0405-0607-0809-0A0B0C0D0E0F" );
test( u2, u"00010203-0405-0607-0809-0A0B0C0D0E0F" );
test( u2, U"00010203-0405-0607-0809-0A0B0C0D0E0F" );
test( u2, u8"00010203-0405-0607-0809-0A0B0C0D0E0F" );
uuid const u3 = {{ 0x12, 0x34, 0x56, 0x78, 0x90, 0xab, 0xcd, 0xef, 0x12, 0x34, 0x56, 0x78, 0x90, 0xab, 0xcd, 0xef }};
test( u3, "12345678-90ab-cdef-1234-567890abcdef" );
test( u3, L"12345678-90ab-cdef-1234-567890abcdef" );
test( u3, u"12345678-90ab-cdef-1234-567890abcdef" );
test( u3, U"12345678-90ab-cdef-1234-567890abcdef" );
test( u3, u8"12345678-90ab-cdef-1234-567890abcdef" );
test( u3, "12345678-90AB-CDEF-1234-567890abcdef" );
test( u3, L"12345678-90AB-CDEF-1234-567890abcdef" );
test( u3, u"12345678-90AB-CDEF-1234-567890abcdef" );
test( u3, U"12345678-90AB-CDEF-1234-567890abcdef" );
test( u3, u8"12345678-90AB-CDEF-1234-567890abcdef" );
test( u3, "12345678-90AB-CDEF-1234-567890abcdefghij" );
test( u3, L"12345678-90AB-CDEF-1234-567890abcdefghij" );
test( u3, u"12345678-90AB-CDEF-1234-567890abcdefghij" );
test( u3, U"12345678-90AB-CDEF-1234-567890abcdefghij" );
test( u3, u8"12345678-90AB-CDEF-1234-567890abcdefghij" );
return boost::report_errors();
}

96
test/test_from_chars_2.cpp Normal file
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@@ -0,0 +1,96 @@
// Copyright 2025 Peter Dimov
// Distributed under the Boost Software License, Version 1.0.
// https://www.boost.org/LICENSE_1_0.txt
#include <boost/uuid/uuid.hpp>
#include <boost/uuid/uuid_io.hpp>
#include <boost/core/lightweight_test.hpp>
#include <string>
using namespace boost::uuids;
template<class Ch> void test( Ch const* str, int pos, from_chars_error err )
{
Ch const* first = str;
Ch const* last = first + std::char_traits<Ch>::length( first );
uuid u;
from_chars_result<Ch> r = from_chars( first, last, u );
BOOST_TEST_EQ( r.ptr, first + pos );
BOOST_TEST( r.ec == err );
BOOST_TEST_EQ( static_cast<int>( r.ec ), static_cast<int>( err ) );
}
int main()
{
test( "", 0, from_chars_error::unexpected_end_of_input );
test( L"", 0, from_chars_error::unexpected_end_of_input );
test( u"", 0, from_chars_error::unexpected_end_of_input );
test( U"", 0, from_chars_error::unexpected_end_of_input );
test( u8"", 0, from_chars_error::unexpected_end_of_input );
test( "@", 0, from_chars_error::hex_digit_expected );
test( L"@", 0, from_chars_error::hex_digit_expected );
test( u"@", 0, from_chars_error::hex_digit_expected );
test( U"@", 0, from_chars_error::hex_digit_expected );
test( u8"@", 0, from_chars_error::hex_digit_expected );
test( "G", 0, from_chars_error::hex_digit_expected );
test( L"G", 0, from_chars_error::hex_digit_expected );
test( u"G", 0, from_chars_error::hex_digit_expected );
test( U"G", 0, from_chars_error::hex_digit_expected );
test( u8"G", 0, from_chars_error::hex_digit_expected );
test( "g", 0, from_chars_error::hex_digit_expected );
test( L"g", 0, from_chars_error::hex_digit_expected );
test( u"g", 0, from_chars_error::hex_digit_expected );
test( U"g", 0, from_chars_error::hex_digit_expected );
test( u8"g", 0, from_chars_error::hex_digit_expected );
test( "-", 0, from_chars_error::hex_digit_expected );
test( L"-", 0, from_chars_error::hex_digit_expected );
test( u"-", 0, from_chars_error::hex_digit_expected );
test( U"-", 0, from_chars_error::hex_digit_expected );
test( u8"-", 0, from_chars_error::hex_digit_expected );
test( "abcdefgh-0000-0000-0000-000000000000", 6, from_chars_error::hex_digit_expected );
test( L"abcdefgh-0000-0000-0000-000000000000", 6, from_chars_error::hex_digit_expected );
test( u"abcdefgh-0000-0000-0000-000000000000", 6, from_chars_error::hex_digit_expected );
test( U"abcdefgh-0000-0000-0000-000000000000", 6, from_chars_error::hex_digit_expected );
test( u8"abcdefgh-0000-0000-0000-000000000000", 6, from_chars_error::hex_digit_expected );
test( "Have a nice day", 0, from_chars_error::hex_digit_expected );
test( L"Have a nice day", 0, from_chars_error::hex_digit_expected );
test( u"Have a nice day", 0, from_chars_error::hex_digit_expected );
test( U"Have a nice day", 0, from_chars_error::hex_digit_expected );
test( u8"Have a nice day", 0, from_chars_error::hex_digit_expected );
test( "0000000000000-0000-0000-000000000000", 8, from_chars_error::dash_expected );
test( L"0000000000000-0000-0000-000000000000", 8, from_chars_error::dash_expected );
test( u"0000000000000-0000-0000-000000000000", 8, from_chars_error::dash_expected );
test( U"0000000000000-0000-0000-000000000000", 8, from_chars_error::dash_expected );
test( u8"0000000000000-0000-0000-000000000000", 8, from_chars_error::dash_expected );
test( "00000000-000000000-0000-000000000000", 13, from_chars_error::dash_expected );
test( L"00000000-000000000-0000-000000000000", 13, from_chars_error::dash_expected );
test( u"00000000-000000000-0000-000000000000", 13, from_chars_error::dash_expected );
test( U"00000000-000000000-0000-000000000000", 13, from_chars_error::dash_expected );
test( u8"00000000-000000000-0000-000000000000", 13, from_chars_error::dash_expected );
test( "00000000-0000-000000000-000000000000", 18, from_chars_error::dash_expected );
test( L"00000000-0000-000000000-000000000000", 18, from_chars_error::dash_expected );
test( u"00000000-0000-000000000-000000000000", 18, from_chars_error::dash_expected );
test( U"00000000-0000-000000000-000000000000", 18, from_chars_error::dash_expected );
test( u8"00000000-0000-000000000-000000000000", 18, from_chars_error::dash_expected );
test( "00000000-0000-0000-00000000000000000", 23, from_chars_error::dash_expected );
test( L"00000000-0000-0000-00000000000000000", 23, from_chars_error::dash_expected );
test( u"00000000-0000-0000-00000000000000000", 23, from_chars_error::dash_expected );
test( U"00000000-0000-0000-00000000000000000", 23, from_chars_error::dash_expected );
test( u8"00000000-0000-0000-00000000000000000", 23, from_chars_error::dash_expected );
return boost::report_errors();
}