#include "docstring.h"
#include "unicode.h"
+#include <locale>
+
#include <boost/assert.hpp>
BOOST_ASSERT(static_cast<unsigned char>(l) < 0x80);
return lyx::docstring::value_type(l) + r;
}
+
+
+#if (!defined(HAVE_WCHAR_T) || SIZEOF_WCHAR_T != 4) && defined(__GNUC__)
+
+// gcc does not have proper locale facets for lyx::char_type if
+// sizeof(wchar_t) == 2, so we have to implement them on our own.
+
+
+// We get undefined references to these virtual methods. This looks like
+// a bug in gcc. The implementation here does not do anything useful, since
+// it is overriden in ascii_ctype_facet.
+namespace std {
+template<> ctype<lyx::char_type>::~ctype() {}
+template<> bool
+ctype<lyx::char_type>::do_is(ctype<lyx::char_type>::mask, lyx::char_type) const { return false; }
+template<> lyx::char_type const *
+ctype<lyx::char_type>::do_is(const lyx::char_type *, const lyx::char_type *, ctype<lyx::char_type>::mask *) const { return 0; }
+template<> const lyx::char_type *
+ctype<lyx::char_type>::do_scan_is(ctype<lyx::char_type>::mask, const lyx::char_type *, const lyx::char_type *) const { return 0; }
+template<> const lyx::char_type *
+ctype<lyx::char_type>::do_scan_not(ctype<lyx::char_type>::mask, const lyx::char_type *, const lyx::char_type *) const { return 0; }
+template<> lyx::char_type ctype<lyx::char_type>::do_toupper(lyx::char_type) const { return 0; }
+template<> const lyx::char_type * ctype<lyx::char_type>::do_toupper(lyx::char_type *, lyx::char_type const *) const { return 0; }
+template<> lyx::char_type ctype<lyx::char_type>::do_tolower(lyx::char_type) const { return 0; }
+template<> const lyx::char_type * ctype<lyx::char_type>::do_tolower(lyx::char_type *, lyx::char_type const *) const { return 0; }
+template<> lyx::char_type ctype<lyx::char_type>::do_widen(char) const { return 0; }
+template<> const char *
+ctype<lyx::char_type>::do_widen(const char *, const char *, lyx::char_type *) const { return 0; }
+template<> char
+ctype<lyx::char_type>::do_narrow(const lyx::char_type, char) const { return 0; }
+template<> const lyx::char_type *
+ctype<lyx::char_type>::do_narrow(const lyx::char_type *, const lyx::char_type *, char, char *) const { return 0; }
+}
+
+
+namespace lyx {
+
+class ctype_failure : public std::bad_cast {
+public:
+ ctype_failure() throw() : std::bad_cast() {}
+ virtual ~ctype_failure() throw() {}
+ virtual const char* what() const throw()
+ {
+ return "The ctype<lyx::char_type> locale facet does only support ASCII characters on this platform.";
+ }
+};
+
+
+/// ctype facet for UCS4 characters. The implementation does only support pure
+/// ASCII, since we do not need anything else for now.
+/// The code is partly stolen from std::ctype<wchar_t> from gcc.
+class ascii_ctype_facet : public std::ctype<lyx::char_type>
+{
+public:
+ typedef lyx::char_type char_type;
+ typedef wctype_t wmask_type;
+ explicit ascii_ctype_facet(size_t refs = 0) : std::ctype<char_type>(refs)
+ {
+ M_initialize_ctype();
+ }
+protected:
+ bool M_narrow_ok;
+ char M_narrow[128];
+ wint_t M_widen[1 + static_cast<unsigned char>(-1)];
+ mask M_bit[16];
+ wmask_type M_wmask[16];
+ wmask_type M_convert_to_wmask(const mask m) const
+ {
+ wmask_type ret;
+ switch (m) {
+ case space: ret = wctype("space"); break;
+ case print: ret = wctype("print"); break;
+ case cntrl: ret = wctype("cntrl"); break;
+ case upper: ret = wctype("upper"); break;
+ case lower: ret = wctype("lower"); break;
+ case alpha: ret = wctype("alpha"); break;
+ case digit: ret = wctype("digit"); break;
+ case punct: ret = wctype("punct"); break;
+ case xdigit: ret = wctype("xdigit"); break;
+ case alnum: ret = wctype("alnum"); break;
+ case graph: ret = wctype("graph"); break;
+ default: ret = wmask_type();
+ }
+ return ret;
+ }
+ void M_initialize_ctype()
+ {
+ wint_t i;
+ for (i = 0; i < 128; ++i) {
+ const int c = wctob(i);
+ if (c == EOF)
+ break;
+ else
+ M_narrow[i] = static_cast<char>(c);
+ }
+ if (i == 128)
+ M_narrow_ok = true;
+ else
+ M_narrow_ok = false;
+ for (size_t i = 0; i < sizeof(M_widen) / sizeof(wint_t); ++i)
+ M_widen[i] = btowc(i);
+
+ for (size_t i = 0; i <= 15; ++i) {
+ M_bit[i] = static_cast<mask>(1 << i);
+ M_wmask[i] = M_convert_to_wmask(M_bit[i]);
+ }
+ }
+ virtual ~ascii_ctype_facet() {}
+ char_type do_toupper(char_type c) const
+ {
+ if (c >= 0x80)
+ throw ctype_failure();
+ return toupper(static_cast<int>(c));
+ }
+ char_type const * do_toupper(char_type * lo, char_type const * hi) const
+ {
+ while (lo < hi) {
+ if (*lo >= 0x80)
+ throw ctype_failure();
+ *lo = toupper(static_cast<int>(*lo));
+ ++lo;
+ }
+ return hi;
+ }
+ char_type do_tolower(char_type c) const
+ {
+ if (c >= 0x80)
+ throw ctype_failure();
+ return tolower(c);
+ }
+ char_type const * do_tolower(char_type * lo, char_type const * hi) const
+ {
+ while (lo < hi) {
+ if (*lo >= 0x80)
+ throw ctype_failure();
+ *lo = tolower(*lo);
+ ++lo;
+ }
+ return hi;
+ }
+ bool do_is(mask m, char_type c) const
+ {
+ if (c >= 0x80)
+ throw ctype_failure();
+ // The code below works because c is in the ASCII range.
+ // We could not use iswctype() which is designed for a 2byte
+ // whar_t without encoding conversion otherwise.
+ bool ret = false;
+ // Generically, 15 (instead of 10) since we don't know the numerical
+ // encoding of the various categories in /usr/include/ctype.h.
+ const size_t bitmasksize = 15;
+ for (size_t bitcur = 0; bitcur <= bitmasksize; ++bitcur)
+ if (m & M_bit[bitcur] &&
+ iswctype(static_cast<int>(c), M_wmask[bitcur])) {
+ ret = true;
+ break;
+ }
+ return ret;
+ }
+ char_type const * do_is(char_type const * lo, char_type const * hi, mask * vec) const
+ {
+ for (;lo < hi; ++vec, ++lo) {
+ if (*lo >= 0x80)
+ throw ctype_failure();
+ // The code below works because c is in the ASCII range.
+ // We could not use iswctype() which is designed for a 2byte
+ // whar_t without encoding conversion otherwise.
+ // Generically, 15 (instead of 10) since we don't know the numerical
+ // encoding of the various categories in /usr/include/ctype.h.
+ const size_t bitmasksize = 15;
+ mask m = 0;
+ for (size_t bitcur = 0; bitcur <= bitmasksize; ++bitcur)
+ if (iswctype(static_cast<int>(*lo), M_wmask[bitcur]))
+ m |= M_bit[bitcur];
+ *vec = m;
+ }
+ return hi;
+ }
+ char_type const * do_scan_is(mask m, char_type const * lo, char_type const * hi) const
+ {
+ while (lo < hi && !this->do_is(m, *lo))
+ ++lo;
+ return lo;
+ }
+ char_type const * do_scan_not(mask m, char_type const * lo, char_type const * hi) const
+ {
+ while (lo < hi && this->do_is(m, *lo) != 0)
+ ++lo;
+ return lo;
+ }
+ char_type do_widen(char c) const
+ {
+ if (static_cast<unsigned char>(c) < 0x80)
+ return c;
+ throw ctype_failure();
+ }
+ const char* do_widen(const char* lo, const char* hi, char_type* dest) const
+ {
+ while (lo < hi) {
+ if (static_cast<unsigned char>(*lo) >= 0x80)
+ throw ctype_failure();
+ *dest = *lo;
+ ++lo;
+ ++dest;
+ }
+ return hi;
+ }
+ char do_narrow(char_type wc, char) const
+ {
+ if (wc < 0x80)
+ return static_cast<char>(wc);
+ throw ctype_failure();
+ }
+ const char_type * do_narrow(const char_type * lo, const char_type * hi, char, char * dest) const
+ {
+ while (lo < hi) {
+ if (*lo < 0x80)
+ *dest = static_cast<char>(*lo);
+ else
+ throw ctype_failure();
+ ++lo;
+ ++dest;
+ }
+ return hi;
+ }
+};
+
+
+/// class to add our ascii_ctype_facet to the global locale
+class locale_initializer {
+public:
+ locale_initializer()
+ {
+ std::locale global;
+ std::locale const loc(global, new ascii_ctype_facet);
+ std::locale::global(loc);
+ }
+};
+
+
+namespace {
+
+/// make sure that our ascii_ctype_facet gets used
+static locale_initializer initializer;
+
+}
+}
+#endif
projects / lyx.git / commitdiff