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Add locale facet in order to input numbers from wide streams on systems
where sizeof(wchar_t) == 2 * src/support/docstring.C: - New class ascii_num_get_facet for inputting numbers from idocstreams. - Add the ascii_num_get_facet facet to the locale initializer. git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@15959 a592a061-630c-0410-9148-cb99ea01b6c8
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@ -443,6 +443,47 @@ protected:
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};
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/// Facet for inputting ascii representations of numbers from idocstreams.
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/// Here we simply need defining the virtual do_get functions.
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class ascii_num_get_facet : public std::num_get<lyx::char_type, std::istreambuf_iterator<lyx::char_type, std::char_traits<lyx::char_type> > >
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{
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typedef std::istreambuf_iterator<lyx::char_type, std::char_traits<lyx::char_type> > iter_type;
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public:
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ascii_num_get_facet(size_t refs = 0) : std::num_get<lyx::char_type, iter_type>(refs) {}
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/// Facet for converting ascii representation of numbers to a value.
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class string_num_get_facet : public std::num_get<char, std::basic_string<char>::iterator>
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{
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public:
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string_num_get_facet() : std::num_get<char, std::basic_string<char>::iterator>(1) {}
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};
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private:
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bool isNumpunct(lyx::char_type const c) const
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{
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/// Only account for the standard numpunct "C" locale facet.
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return c < 0x80 && (c == '-' || c == '+' || isdigit(c)
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|| ('a' <= c && c <= 'f') || ('A' <= c && c <= 'F')
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|| c == 'x' || c == 'X');
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}
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protected:
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iter_type
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do_get(iter_type iit, iter_type eit, std::ios_base & b,
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std::ios_base::iostate & err, long & v) const
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{
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std::string s;
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s.resize(64);
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for (int i = 0; iit != eit && isNumpunct(*iit); ++i, ++iit)
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s[i] = static_cast<char>(*iit);
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string_num_get_facet f;
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f.get(s.begin(), s.end(), b, err, v);
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return iit;
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}
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};
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/// class to add our facets to the global locale
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class locale_initializer {
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public:
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@ -451,7 +492,8 @@ public:
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std::locale global;
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std::locale const loc1(global, new ascii_ctype_facet);
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std::locale const loc2(loc1, new ascii_num_put_facet);
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std::locale::global(loc2);
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std::locale const loc3(loc2, new ascii_num_get_facet);
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std::locale::global(loc3);
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}
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};
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