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Diffstat (limited to '3rdParty/Boost/src/boost/uuid/string_generator.hpp')
-rw-r--r-- | 3rdParty/Boost/src/boost/uuid/string_generator.hpp | 184 |
1 files changed, 184 insertions, 0 deletions
diff --git a/3rdParty/Boost/src/boost/uuid/string_generator.hpp b/3rdParty/Boost/src/boost/uuid/string_generator.hpp new file mode 100644 index 0000000..7d2733b --- /dev/null +++ b/3rdParty/Boost/src/boost/uuid/string_generator.hpp @@ -0,0 +1,184 @@ +// Boost string_generator.hpp header file ----------------------------------------------// + +// Copyright 2010 Andy Tompkins. +// Distributed under the Boost Software License, Version 1.0. (See +// accompanying file LICENSE_1_0.txt or copy at +// http://www.boost.org/LICENSE_1_0.txt) + +#ifndef BOOST_UUID_STRING_GENERATOR_HPP +#define BOOST_UUID_STRING_GENERATOR_HPP + +#include <boost/uuid/uuid.hpp> +#include <string> +#include <cstring> // for strlen, wcslen +#include <iterator> +#include <algorithm> // for find +#include <stdexcept> + +#ifdef BOOST_NO_STDC_NAMESPACE +namespace std { + using ::strlen; + using ::wcslen; +} //namespace std +#endif //BOOST_NO_STDC_NAMESPACE + +namespace boost { +namespace uuids { + +// generate a uuid from a string +// lexical_cast works fine using uuid_io.hpp +// but this generator should accept more forms +// and be more efficient +// would like to accept the following forms: +// 0123456789abcdef0123456789abcdef +// 01234567-89ab-cdef-0123456789abcdef +// {01234567-89ab-cdef-0123456789abcdef} +// {0123456789abcdef0123456789abcdef} +// others? +struct string_generator { + typedef uuid result_type; + + template <typename ch, typename char_traits, typename alloc> + uuid operator()(std::basic_string<ch, char_traits, alloc> const& s) const { + return operator()(s.begin(), s.end()); + }; + + uuid operator()(char const*const s) const { + return operator()(s, s+std::strlen(s)); + } + + uuid operator()(wchar_t const*const s) const { + return operator()(s, s+std::wcslen(s)); + } + + template <typename CharIterator> + uuid operator()(CharIterator begin, CharIterator end) const + { + typedef typename std::iterator_traits<CharIterator>::value_type char_type; + + // check open brace + char_type c = get_next_char(begin, end); + bool has_open_brace = is_open_brace(c); + char_type open_brace_char = c; + if (has_open_brace) { + c = get_next_char(begin, end); + } + + bool has_dashes = false; + + uuid u; + int i=0; + for (uuid::iterator it_byte=u.begin(); it_byte!=u.end(); ++it_byte, ++i) { + if (it_byte != u.begin()) { + c = get_next_char(begin, end); + } + + if (i == 4) { + has_dashes = is_dash(c); + if (has_dashes) { + c = get_next_char(begin, end); + } + } + + if (has_dashes) { + if (i == 6 || i == 8 || i == 10) { + if (is_dash(c)) { + c = get_next_char(begin, end); + } else { + throw_invalid(); + } + } + } + + *it_byte = get_value(c); + + c = get_next_char(begin, end); + *it_byte <<= 4; + *it_byte |= get_value(c); + } + + // check close brace + if (has_open_brace) { + c = get_next_char(begin, end); + check_close_brace(c, open_brace_char); + } + + return u; + } + +private: + template <typename CharIterator> + typename std::iterator_traits<CharIterator>::value_type + get_next_char(CharIterator& begin, CharIterator end) const { + if (begin == end) { + throw_invalid(); + } + return *begin++; + } + + unsigned char get_value(char c) const { + static char const*const digits_begin = "0123456789abcdefABCDEF"; + static char const*const digits_end = digits_begin + 22; + + static unsigned char const values[] = + { 0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,10,11,12,13,14,15 + , static_cast<unsigned char>(-1) }; + + char const* d = std::find(digits_begin, digits_end, c); + return values[d - digits_begin]; + } + + unsigned char get_value(wchar_t c) const { + static wchar_t const*const digits_begin = L"0123456789abcdefABCDEF"; + static wchar_t const*const digits_end = digits_begin + 22; + + static unsigned char const values[] = + { 0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,10,11,12,13,14,15 + , static_cast<unsigned char>(-1) }; + + wchar_t const* d = std::find(digits_begin, digits_end, c); + return values[d - digits_begin]; + } + + bool is_dash(char c) const { + return c == '-'; + } + + bool is_dash(wchar_t c) const { + return c == L'-'; + } + + // return closing brace + bool is_open_brace(char c) const { + return (c == '{'); + } + + bool is_open_brace(wchar_t c) const { + return (c == L'{'); + } + + void check_close_brace(char c, char open_brace) const { + if (open_brace == '{' && c == '}') { + //great + } else { + throw_invalid(); + } + } + + void check_close_brace(wchar_t c, wchar_t open_brace) const { + if (open_brace == L'{' && c == L'}') { + // great + } else { + throw_invalid(); + } + } + + void throw_invalid() const { + throw std::runtime_error("invalid uuid string"); + } +}; + +}} // namespace boost::uuids + +#endif //BOOST_UUID_STRING_GENERATOR_HPP + |