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author | Jörg Frings-Fürst <debian@jff.email> | 2025-03-19 15:41:36 +0100 |
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committer | Jörg Frings-Fürst <debian@jff.email> | 2025-03-19 15:41:36 +0100 |
commit | 018e1ba581ec6f01f069a45ec4cf89f152b44d5f (patch) | |
tree | 0e7dda4bb693a6714066fbe5efcd2f24ff7c1a65 /libcutl/cutl/details/boost/regex/v4/primary_transform.hpp | |
parent | 1c188393cd2e271ed2581471b601fb5960777fd8 (diff) |
remerge
Diffstat (limited to 'libcutl/cutl/details/boost/regex/v4/primary_transform.hpp')
-rw-r--r-- | libcutl/cutl/details/boost/regex/v4/primary_transform.hpp | 146 |
1 files changed, 146 insertions, 0 deletions
diff --git a/libcutl/cutl/details/boost/regex/v4/primary_transform.hpp b/libcutl/cutl/details/boost/regex/v4/primary_transform.hpp new file mode 100644 index 0000000..ae59e5b --- /dev/null +++ b/libcutl/cutl/details/boost/regex/v4/primary_transform.hpp @@ -0,0 +1,146 @@ +/* + * + * Copyright (c) 1998-2002 + * John Maddock + * + * Use, modification and distribution are subject to 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) + * + */ + + /* + * LOCATION: see http://www.boost.org for most recent version. + * FILE: primary_transform.hpp + * VERSION: see <cutl/details/boost/version.hpp> + * DESCRIPTION: Heuristically determines the sort string format in use + * by the current locale. + */ + +#ifndef BOOST_REGEX_PRIMARY_TRANSFORM +#define BOOST_REGEX_PRIMARY_TRANSFORM + +#ifdef BOOST_MSVC +#pragma warning(push) +#pragma warning(disable: 4103) +#endif +#ifdef BOOST_HAS_ABI_HEADERS +# include BOOST_ABI_PREFIX +#endif +#ifdef BOOST_MSVC +#pragma warning(pop) +#endif + +namespace cutl_details_boost{ + namespace re_detail{ + + +enum{ + sort_C, + sort_fixed, + sort_delim, + sort_unknown +}; + +template <class S, class charT> +unsigned count_chars(const S& s, charT c) +{ + // + // Count how many occurances of character c occur + // in string s: if c is a delimeter between collation + // fields, then this should be the same value for all + // sort keys: + // + unsigned int count = 0; + for(unsigned pos = 0; pos < s.size(); ++pos) + { + if(s[pos] == c) ++count; + } + return count; +} + + +template <class traits, class charT> +unsigned find_sort_syntax(const traits* pt, charT* delim) +{ + // + // compare 'a' with 'A' to see how similar they are, + // should really use a-accute but we can't portably do that, + // + typedef typename traits::string_type string_type; + typedef typename traits::char_type char_type; + + // Suppress incorrect warning for MSVC + (void)pt; + + char_type a[2] = {'a', '\0', }; + string_type sa(pt->transform(a, a+1)); + if(sa == a) + { + *delim = 0; + return sort_C; + } + char_type A[2] = { 'A', '\0', }; + string_type sA(pt->transform(A, A+1)); + char_type c[2] = { ';', '\0', }; + string_type sc(pt->transform(c, c+1)); + + int pos = 0; + while((pos <= static_cast<int>(sa.size())) && (pos <= static_cast<int>(sA.size())) && (sa[pos] == sA[pos])) ++pos; + --pos; + if(pos < 0) + { + *delim = 0; + return sort_unknown; + } + // + // at this point sa[pos] is either the end of a fixed width field + // or the character that acts as a delimiter: + // + charT maybe_delim = sa[pos]; + if((pos != 0) && (count_chars(sa, maybe_delim) == count_chars(sA, maybe_delim)) && (count_chars(sa, maybe_delim) == count_chars(sc, maybe_delim))) + { + *delim = maybe_delim; + return sort_delim; + } + // + // OK doen't look like a delimiter, try for fixed width field: + // + if((sa.size() == sA.size()) && (sa.size() == sc.size())) + { + // note assumes that the fixed width field is less than + // (numeric_limits<charT>::max)(), should be true for all types + // I can't imagine 127 character fields... + *delim = static_cast<charT>(++pos); + return sort_fixed; + } + // + // don't know what it is: + // + *delim = 0; + return sort_unknown; +} + + + } // namespace re_detail +} // namespace cutl_details_boost + +#ifdef BOOST_MSVC +#pragma warning(push) +#pragma warning(disable: 4103) +#endif +#ifdef BOOST_HAS_ABI_HEADERS +# include BOOST_ABI_SUFFIX +#endif +#ifdef BOOST_MSVC +#pragma warning(pop) +#endif + +#endif + + + + + + + |