src/common/xlocale.cpp

   1 //////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/common/xlocale.cpp
   3 // Purpose:     xlocale wrappers/impl to provide some xlocale wrappers
   4 // Author:      Brian Vanderburg II, Vadim Zeitlin
   5 // Created:     2008-01-07
   6 // RCS-ID:      $Id$
   7 // Copyright:   (c) 2008 Brian Vanderburg II
   8 //                  2008 Vadim Zeitlin <vadim@wxwidgets.org>
   9 // Licence:     wxWindows licence
  10 ///////////////////////////////////////////////////////////////////////////////
  11
  12 // ============================================================================
  13 // declarations
  14 // ============================================================================
  15
  16 // ----------------------------------------------------------------------------
  17 // headers
  18 // ----------------------------------------------------------------------------
  19
  20 #include "wx/wxprec.h"
  21
  22 #ifdef __BORLANDC__
  23     #pragma hdrstop
  24 #endif
  25
  26 #if wxUSE_XLOCALE
  27
  28 #ifndef WX_PRECOMP
  29     #include "wx/module.h"
  30 #endif
  31
  32 #include "wx/xlocale.h"
  33
  34 #include <errno.h>
  35
  36 // ----------------------------------------------------------------------------
  37 // module globals
  38 // ----------------------------------------------------------------------------
  39
  40 // This is the C locale object, it is created on demand
  41 static wxXLocale *gs_cLocale = NULL;
  42
  43 wxXLocale wxNullXLocale;
  44
  45
  46 // ============================================================================
  47 // implementation
  48 // ============================================================================
  49
  50 // ----------------------------------------------------------------------------
  51 // Module for gs_cLocale cleanup
  52 // ----------------------------------------------------------------------------
  53
  54 class wxXLocaleModule : public wxModule
  55 {
  56 public:
  57     virtual bool OnInit() { return true; }
  58     virtual void OnExit() { wxDELETE(gs_cLocale); }
  59
  60     DECLARE_DYNAMIC_CLASS(wxXLocaleModule)
  61 };
  62
  63 IMPLEMENT_DYNAMIC_CLASS(wxXLocaleModule, wxModule)
  64
  65
  66 // ============================================================================
  67 // wxXLocale implementation
  68 // ============================================================================
  69
  70 // ----------------------------------------------------------------------------
  71 // common parts
  72 // ----------------------------------------------------------------------------
  73
  74 // Get the C locale
  75 wxXLocale& wxXLocale::GetCLocale()
  76 {
  77     if ( !gs_cLocale )
  78     {
  79         gs_cLocale = new wxXLocale(static_cast<wxXLocaleCTag *>(NULL));
  80     }
  81
  82     return *gs_cLocale;
  83 }
  84
  85 #ifdef wxHAS_XLOCALE_SUPPORT
  86
  87 wxXLocale::wxXLocale(wxLanguage lang)
  88 {
  89     const wxLanguageInfo * const info = wxLocale::GetLanguageInfo(lang);
  90     if ( !info )
  91     {
  92         m_locale = NULL;
  93     }
  94     else
  95     {
  96         Init(info->GetLocaleName().c_str());
  97     }
  98 }
  99
 100 #if wxCHECK_VISUALC_VERSION(8)
 101
 102 // ----------------------------------------------------------------------------
 103 // implementation using MSVC locale API
 104 // ----------------------------------------------------------------------------
 105
 106 void wxXLocale::Init(const char *loc)
 107 {
 108     if (!loc || *loc == '\0')
 109         return;
 110
 111     m_locale = _create_locale(LC_ALL, loc);
 112 }
 113
 114 void wxXLocale::Free()
 115 {
 116     if ( m_locale )
 117         _free_locale(m_locale);
 118 }
 119
 120 #elif defined(HAVE_LOCALE_T)
 121
 122 // ----------------------------------------------------------------------------
 123 // implementation using xlocale API
 124 // ----------------------------------------------------------------------------
 125
 126 void wxXLocale::Init(const char *loc)
 127 {
 128     if (!loc || *loc == '\0')
 129         return;
 130
 131     m_locale = newlocale(LC_ALL_MASK, loc, NULL);
 132     if (!m_locale)
 133     {
 134         // NOTE: here we do something similar to what wxSetLocaleTryUTF8() does
 135         //       in wxLocale code (but with newlocale() calls instead of wxSetlocale())
 136         wxString buf(loc);
 137         wxString buf2;
 138         buf2 = buf + wxS(".UTF-8");
 139         m_locale = newlocale(LC_ALL_MASK, buf2.c_str(), NULL);
 140         if ( !m_locale )
 141         {
 142             buf2 = buf + wxS(".utf-8");
 143             m_locale = newlocale(LC_ALL_MASK, buf2.c_str(), NULL);
 144         }
 145         if ( !m_locale )
 146         {
 147             buf2 = buf + wxS(".UTF8");
 148             m_locale = newlocale(LC_ALL_MASK, buf2.c_str(), NULL);
 149         }
 150         if ( !m_locale )
 151         {
 152             buf2 = buf + wxS(".utf8");
 153             m_locale = newlocale(LC_ALL_MASK, buf2.c_str(), NULL);
 154         }
 155     }
 156
 157     // TODO: wxLocale performs many more manipulations of the given locale
 158     //       string in the attempt to set a valid locale; reusing that code
 159     //       (changing it to take a generic wxTryLocale callback) would be nice
 160 }
 161
 162 void wxXLocale::Free()
 163 {
 164     if ( m_locale )
 165         freelocale(m_locale);
 166 }
 167
 168 #else
 169     #error "Unknown xlocale support."
 170 #endif
 171
 172 #endif // wxHAS_XLOCALE_SUPPORT
 173
 174 #ifndef wxHAS_XLOCALE_SUPPORT
 175
 176 // ============================================================================
 177 // Implementation of wxFoo_l() functions for "C" locale without xlocale support
 178 // ============================================================================
 179
 180 // ----------------------------------------------------------------------------
 181 // character classification and transformation functions
 182 // ----------------------------------------------------------------------------
 183
 184 // lookup table and macros for character type functions
 185 #define CTYPE_ALNUM 0x0001
 186 #define CTYPE_ALPHA 0x0002
 187 #define CTYPE_CNTRL 0x0004
 188 #define CTYPE_DIGIT 0x0008
 189 #define CTYPE_GRAPH 0x0010
 190 #define CTYPE_LOWER 0x0020
 191 #define CTYPE_PRINT 0x0040
 192 #define CTYPE_PUNCT 0x0080
 193 #define CTYPE_SPACE 0x0100
 194 #define CTYPE_UPPER 0x0200
 195 #define CTYPE_XDIGIT 0x0400
 196
 197 static const unsigned int gs_lookup[] =
 198 {
 199     0x0004, 0x0004, 0x0004, 0x0004, 0x0004, 0x0004, 0x0004, 0x0004,
 200     0x0004, 0x0104, 0x0104, 0x0104, 0x0104, 0x0104, 0x0004, 0x0004,
 201     0x0004, 0x0004, 0x0004, 0x0004, 0x0004, 0x0004, 0x0004, 0x0004,
 202     0x0004, 0x0004, 0x0004, 0x0004, 0x0004, 0x0004, 0x0004, 0x0004,
 203     0x0140, 0x00D0, 0x00D0, 0x00D0, 0x00D0, 0x00D0, 0x00D0, 0x00D0,
 204     0x00D0, 0x00D0, 0x00D0, 0x00D0, 0x00D0, 0x00D0, 0x00D0, 0x00D0,
 205     0x0459, 0x0459, 0x0459, 0x0459, 0x0459, 0x0459, 0x0459, 0x0459,
 206     0x0459, 0x0459, 0x00D0, 0x00D0, 0x00D0, 0x00D0, 0x00D0, 0x00D0,
 207     0x00D0, 0x0653, 0x0653, 0x0653, 0x0653, 0x0653, 0x0653, 0x0253,
 208     0x0253, 0x0253, 0x0253, 0x0253, 0x0253, 0x0253, 0x0253, 0x0253,
 209     0x0253, 0x0253, 0x0253, 0x0253, 0x0253, 0x0253, 0x0253, 0x0253,
 210     0x0253, 0x0253, 0x0253, 0x00D0, 0x00D0, 0x00D0, 0x00D0, 0x00D0,
 211     0x00D0, 0x0473, 0x0473, 0x0473, 0x0473, 0x0473, 0x0473, 0x0073,
 212     0x0073, 0x0073, 0x0073, 0x0073, 0x0073, 0x0073, 0x0073, 0x0073,
 213     0x0073, 0x0073, 0x0073, 0x0073, 0x0073, 0x0073, 0x0073, 0x0073,
 214     0x0073, 0x0073, 0x0073, 0x00D0, 0x00D0, 0x00D0, 0x00D0, 0x0004
 215 };
 216
 217
 218 #define CTYPE_TEST(c, t) ( (c) <= 127 && (gs_lookup[(c)] & (t)) )
 219
 220
 221 // ctype functions
 222 #define GEN_ISFUNC(name, test) \
 223 int name(const wxUniChar& c, const wxXLocale& loc) \
 224 { \
 225     wxCHECK(loc.IsOk(), false); \
 226     return CTYPE_TEST(c.GetValue(), test); \
 227 }
 228
 229 GEN_ISFUNC(wxIsalnum_l, CTYPE_ALNUM)
 230 GEN_ISFUNC(wxIsalpha_l, CTYPE_ALPHA)
 231 GEN_ISFUNC(wxIscntrl_l, CTYPE_CNTRL)
 232 GEN_ISFUNC(wxIsdigit_l, CTYPE_DIGIT)
 233 GEN_ISFUNC(wxIsgraph_l, CTYPE_GRAPH)
 234 GEN_ISFUNC(wxIslower_l, CTYPE_LOWER)
 235 GEN_ISFUNC(wxIsprint_l, CTYPE_PRINT)
 236 GEN_ISFUNC(wxIspunct_l, CTYPE_PUNCT)
 237 GEN_ISFUNC(wxIsspace_l, CTYPE_SPACE)
 238 GEN_ISFUNC(wxIsupper_l, CTYPE_UPPER)
 239 GEN_ISFUNC(wxIsxdigit_l, CTYPE_XDIGIT)
 240
 241 int wxTolower_l(const wxUniChar& c, const wxXLocale& loc)
 242 {
 243     wxCHECK(loc.IsOk(), false);
 244
 245     if(CTYPE_TEST(c.GetValue(), CTYPE_UPPER))
 246     {
 247         return c - 'A' + 'a';
 248     }
 249
 250     return c;
 251 }
 252
 253 int wxToupper_l(const wxUniChar& c, const wxXLocale& loc)
 254 {
 255     wxCHECK(loc.IsOk(), false);
 256
 257     if(CTYPE_TEST(c.GetValue(), CTYPE_LOWER))
 258     {
 259         return c - 'a' + 'A';
 260     }
 261
 262     return c;
 263 }
 264
 265
 266 // ----------------------------------------------------------------------------
 267 // string --> number conversion functions
 268 // ----------------------------------------------------------------------------
 269
 270 /*
 271     WARNING: the implementation of the wxStrtoX_l() functions below is unsafe
 272              in a multi-threaded environment as we temporary change the locale
 273              and if in the meanwhile an other thread performs some locale-dependent
 274              operation, it may get unexpected results...
 275              However this is the best we can do without reinventing the wheel in the
 276              case !wxHAS_XLOCALE_SUPPORT...
 277 */
 278
 279 /*
 280     Note that this code is similar to (a portion of) wxLocale::IsAvailable code
 281 */
 282 #define IMPLEMENT_STRTOX_L_START                                \
 283     wxCHECK(loc.IsOk(), 0);                                     \
 284                                                                 \
 285     /* (Try to) temporary set the 'C' locale */                 \
 286     const char *oldLocale = wxSetlocale(LC_NUMERIC, "C");       \
 287     if ( !oldLocale )                                           \
 288     {                                                           \
 289         /* the current locale was not changed; no need to */    \
 290         /* restore the previous one... */                       \
 291         errno = EINVAL;                                         \
 292             /* signal an error (better than nothing) */         \
 293         return 0;                                               \
 294     }
 295
 296 #define IMPLEMENT_STRTOX_L_END                                  \
 297     /* restore the original locale */                           \
 298     wxSetlocale(LC_NUMERIC, oldLocale);                         \
 299     return ret;
 300
 301 double wxStrtod_l(const wchar_t* str, wchar_t **endptr, const wxXLocale& loc)
 302 {
 303     IMPLEMENT_STRTOX_L_START
 304     double ret = wxStrtod(str, endptr);
 305     IMPLEMENT_STRTOX_L_END
 306 }
 307
 308 double wxStrtod_l(const char* str, char **endptr, const wxXLocale& loc)
 309 {
 310     IMPLEMENT_STRTOX_L_START
 311     double ret = wxStrtod(str, endptr);
 312     IMPLEMENT_STRTOX_L_END
 313 }
 314
 315 long wxStrtol_l(const wchar_t* str, wchar_t **endptr, int base, const wxXLocale& loc)
 316 {
 317     IMPLEMENT_STRTOX_L_START
 318     long ret = wxStrtol(str, endptr, base);
 319     IMPLEMENT_STRTOX_L_END
 320 }
 321
 322 long wxStrtol_l(const char* str, char **endptr, int base, const wxXLocale& loc)
 323 {
 324     IMPLEMENT_STRTOX_L_START
 325     long ret = wxStrtol(str, endptr, base);
 326     IMPLEMENT_STRTOX_L_END
 327 }
 328
 329 unsigned long wxStrtoul_l(const wchar_t* str, wchar_t **endptr, int base, const wxXLocale& loc)
 330 {
 331     IMPLEMENT_STRTOX_L_START
 332     unsigned long ret = wxStrtoul(str, endptr, base);
 333     IMPLEMENT_STRTOX_L_END
 334 }
 335
 336 unsigned long wxStrtoul_l(const char* str, char **endptr, int base, const wxXLocale& loc)
 337 {
 338     IMPLEMENT_STRTOX_L_START
 339     unsigned long ret = wxStrtoul(str, endptr, base);
 340     IMPLEMENT_STRTOX_L_END
 341 }
 342
 343
 344 #endif // !defined(wxHAS_XLOCALE_SUPPORT)
 345
 346 #endif // wxUSE_XLOCALE