| 1 | ///////////////////////////////////////////////////////////////////////////// |
| 2 | // Name: src/common/string.cpp |
| 3 | // Purpose: wxString class |
| 4 | // Author: Vadim Zeitlin, Ryan Norton |
| 5 | // Modified by: |
| 6 | // Created: 29/01/98 |
| 7 | // RCS-ID: $Id$ |
| 8 | // Copyright: (c) 1998 Vadim Zeitlin <zeitlin@dptmaths.ens-cachan.fr> |
| 9 | // (c) 2004 Ryan Norton <wxprojects@comcast.net> |
| 10 | // Licence: wxWindows licence |
| 11 | ///////////////////////////////////////////////////////////////////////////// |
| 12 | |
| 13 | // =========================================================================== |
| 14 | // headers, declarations, constants |
| 15 | // =========================================================================== |
| 16 | |
| 17 | // For compilers that support precompilation, includes "wx.h". |
| 18 | #include "wx/wxprec.h" |
| 19 | |
| 20 | #ifdef __BORLANDC__ |
| 21 | #pragma hdrstop |
| 22 | #endif |
| 23 | |
| 24 | #ifndef WX_PRECOMP |
| 25 | #include "wx/string.h" |
| 26 | #include "wx/wxcrtvararg.h" |
| 27 | #endif |
| 28 | |
| 29 | #include <ctype.h> |
| 30 | |
| 31 | #ifndef __WXWINCE__ |
| 32 | #include <errno.h> |
| 33 | #endif |
| 34 | |
| 35 | #include <string.h> |
| 36 | #include <stdlib.h> |
| 37 | |
| 38 | #ifdef __SALFORDC__ |
| 39 | #include <clib.h> |
| 40 | #endif |
| 41 | |
| 42 | #include "wx/hashmap.h" |
| 43 | |
| 44 | // string handling functions used by wxString: |
| 45 | #if wxUSE_UNICODE_UTF8 |
| 46 | #define wxStringMemcpy memcpy |
| 47 | #define wxStringMemcmp memcmp |
| 48 | #define wxStringMemchr memchr |
| 49 | #define wxStringStrlen strlen |
| 50 | #else |
| 51 | #define wxStringMemcpy wxTmemcpy |
| 52 | #define wxStringMemcmp wxTmemcmp |
| 53 | #define wxStringMemchr wxTmemchr |
| 54 | #define wxStringStrlen wxStrlen |
| 55 | #endif |
| 56 | |
| 57 | |
| 58 | // --------------------------------------------------------------------------- |
| 59 | // static class variables definition |
| 60 | // --------------------------------------------------------------------------- |
| 61 | |
| 62 | //According to STL _must_ be a -1 size_t |
| 63 | const size_t wxString::npos = (size_t) -1; |
| 64 | |
| 65 | // ---------------------------------------------------------------------------- |
| 66 | // global functions |
| 67 | // ---------------------------------------------------------------------------- |
| 68 | |
| 69 | #if wxUSE_STD_IOSTREAM |
| 70 | |
| 71 | #include <iostream> |
| 72 | |
| 73 | wxSTD ostream& operator<<(wxSTD ostream& os, const wxCStrData& str) |
| 74 | { |
| 75 | #if wxUSE_UNICODE && !wxUSE_UNICODE_UTF8 |
| 76 | return os << (const char *)str.AsCharBuf(); |
| 77 | #else |
| 78 | return os << str.AsInternal(); |
| 79 | #endif |
| 80 | } |
| 81 | |
| 82 | wxSTD ostream& operator<<(wxSTD ostream& os, const wxString& str) |
| 83 | { |
| 84 | return os << str.c_str(); |
| 85 | } |
| 86 | |
| 87 | wxSTD ostream& operator<<(wxSTD ostream& os, const wxCharBuffer& str) |
| 88 | { |
| 89 | return os << str.data(); |
| 90 | } |
| 91 | |
| 92 | #ifndef __BORLANDC__ |
| 93 | wxSTD ostream& operator<<(wxSTD ostream& os, const wxWCharBuffer& str) |
| 94 | { |
| 95 | return os << str.data(); |
| 96 | } |
| 97 | #endif |
| 98 | |
| 99 | #if wxUSE_UNICODE && defined(HAVE_WOSTREAM) |
| 100 | |
| 101 | wxSTD wostream& operator<<(wxSTD wostream& wos, const wxString& str) |
| 102 | { |
| 103 | return wos << str.wc_str(); |
| 104 | } |
| 105 | |
| 106 | wxSTD wostream& operator<<(wxSTD wostream& wos, const wxCStrData& str) |
| 107 | { |
| 108 | return wos << str.AsWChar(); |
| 109 | } |
| 110 | |
| 111 | wxSTD wostream& operator<<(wxSTD wostream& wos, const wxWCharBuffer& str) |
| 112 | { |
| 113 | return wos << str.data(); |
| 114 | } |
| 115 | |
| 116 | #endif // wxUSE_UNICODE && defined(HAVE_WOSTREAM) |
| 117 | |
| 118 | #endif // wxUSE_STD_IOSTREAM |
| 119 | |
| 120 | // =========================================================================== |
| 121 | // wxString class core |
| 122 | // =========================================================================== |
| 123 | |
| 124 | #if wxUSE_UNICODE_UTF8 |
| 125 | |
| 126 | void wxString::PosLenToImpl(size_t pos, size_t len, |
| 127 | size_t *implPos, size_t *implLen) const |
| 128 | { |
| 129 | if ( pos == npos ) |
| 130 | *implPos = npos; |
| 131 | else |
| 132 | { |
| 133 | const_iterator i = begin() + pos; |
| 134 | *implPos = wxStringImpl::const_iterator(i.impl()) - m_impl.begin(); |
| 135 | if ( len == npos ) |
| 136 | *implLen = npos; |
| 137 | else |
| 138 | { |
| 139 | // too large length is interpreted as "to the end of the string" |
| 140 | // FIXME-UTF8: verify this is the case in std::string, assert |
| 141 | // otherwise |
| 142 | if ( pos + len > length() ) |
| 143 | len = length() - pos; |
| 144 | |
| 145 | *implLen = (i + len).impl() - i.impl(); |
| 146 | } |
| 147 | } |
| 148 | } |
| 149 | |
| 150 | #endif // wxUSE_UNICODE_UTF8 |
| 151 | |
| 152 | // ---------------------------------------------------------------------------- |
| 153 | // wxCStrData converted strings caching |
| 154 | // ---------------------------------------------------------------------------- |
| 155 | |
| 156 | // FIXME-UTF8: temporarily disabled because it doesn't work with global |
| 157 | // string objects; re-enable after fixing this bug and benchmarking |
| 158 | // performance to see if using a hash is a good idea at all |
| 159 | #if 0 |
| 160 | |
| 161 | // For backward compatibility reasons, it must be possible to assign the value |
| 162 | // returned by wxString::c_str() to a char* or wchar_t* variable and work with |
| 163 | // it. Returning wxCharBuffer from (const char*)c_str() wouldn't do the trick, |
| 164 | // because the memory would be freed immediately, but it has to be valid as long |
| 165 | // as the string is not modified, so that code like this still works: |
| 166 | // |
| 167 | // const wxChar *s = str.c_str(); |
| 168 | // while ( s ) { ... } |
| 169 | |
| 170 | // FIXME-UTF8: not thread safe! |
| 171 | // FIXME-UTF8: we currently clear the cached conversion only when the string is |
| 172 | // destroyed, but we should do it when the string is modified, to |
| 173 | // keep memory usage down |
| 174 | // FIXME-UTF8: we do the conversion every time As[W]Char() is called, but if we |
| 175 | // invalidated the cache on every change, we could keep the previous |
| 176 | // conversion |
| 177 | // FIXME-UTF8: add tracing of usage of these two methods - new code is supposed |
| 178 | // to use mb_str() or wc_str() instead of (const [w]char*)c_str() |
| 179 | |
| 180 | template<typename T> |
| 181 | static inline void DeleteStringFromConversionCache(T& hash, const wxString *s) |
| 182 | { |
| 183 | typename T::iterator i = hash.find(wxConstCast(s, wxString)); |
| 184 | if ( i != hash.end() ) |
| 185 | { |
| 186 | free(i->second); |
| 187 | hash.erase(i); |
| 188 | } |
| 189 | } |
| 190 | |
| 191 | #if wxUSE_UNICODE |
| 192 | // NB: non-STL implementation doesn't compile with "const wxString*" key type, |
| 193 | // so we have to use wxString* here and const-cast when used |
| 194 | WX_DECLARE_HASH_MAP(wxString*, char*, wxPointerHash, wxPointerEqual, |
| 195 | wxStringCharConversionCache); |
| 196 | static wxStringCharConversionCache gs_stringsCharCache; |
| 197 | |
| 198 | const char* wxCStrData::AsChar() const |
| 199 | { |
| 200 | // remove previously cache value, if any (see FIXMEs above): |
| 201 | DeleteStringFromConversionCache(gs_stringsCharCache, m_str); |
| 202 | |
| 203 | // convert the string and keep it: |
| 204 | const char *s = gs_stringsCharCache[wxConstCast(m_str, wxString)] = |
| 205 | m_str->mb_str().release(); |
| 206 | |
| 207 | return s + m_offset; |
| 208 | } |
| 209 | #endif // wxUSE_UNICODE |
| 210 | |
| 211 | #if !wxUSE_UNICODE_WCHAR |
| 212 | WX_DECLARE_HASH_MAP(wxString*, wchar_t*, wxPointerHash, wxPointerEqual, |
| 213 | wxStringWCharConversionCache); |
| 214 | static wxStringWCharConversionCache gs_stringsWCharCache; |
| 215 | |
| 216 | const wchar_t* wxCStrData::AsWChar() const |
| 217 | { |
| 218 | // remove previously cache value, if any (see FIXMEs above): |
| 219 | DeleteStringFromConversionCache(gs_stringsWCharCache, m_str); |
| 220 | |
| 221 | // convert the string and keep it: |
| 222 | const wchar_t *s = gs_stringsWCharCache[wxConstCast(m_str, wxString)] = |
| 223 | m_str->wc_str().release(); |
| 224 | |
| 225 | return s + m_offset; |
| 226 | } |
| 227 | #endif // !wxUSE_UNICODE_WCHAR |
| 228 | |
| 229 | wxString::~wxString() |
| 230 | { |
| 231 | #if wxUSE_UNICODE |
| 232 | // FIXME-UTF8: do this only if locale is not UTF8 if wxUSE_UNICODE_UTF8 |
| 233 | DeleteStringFromConversionCache(gs_stringsCharCache, this); |
| 234 | #endif |
| 235 | #if !wxUSE_UNICODE_WCHAR |
| 236 | DeleteStringFromConversionCache(gs_stringsWCharCache, this); |
| 237 | #endif |
| 238 | } |
| 239 | #endif |
| 240 | |
| 241 | #if wxUSE_UNICODE && !wxUSE_UTF8_LOCALE_ONLY |
| 242 | const char* wxCStrData::AsChar() const |
| 243 | { |
| 244 | #if wxUSE_UNICODE_UTF8 |
| 245 | if ( wxLocaleIsUtf8 ) |
| 246 | return AsInternal(); |
| 247 | #endif |
| 248 | // under non-UTF8 locales, we have to convert the internal UTF-8 |
| 249 | // representation using wxConvLibc and cache the result |
| 250 | |
| 251 | wxString *str = wxConstCast(m_str, wxString); |
| 252 | |
| 253 | // convert the string: |
| 254 | // |
| 255 | // FIXME-UTF8: we'd like to do the conversion in the existing buffer (if we |
| 256 | // have it) but it's unfortunately not obvious to implement |
| 257 | // because we don't know how big buffer do we need for the |
| 258 | // given string length (in case of multibyte encodings, e.g. |
| 259 | // ISO-2022-JP or UTF-8 when internal representation is wchar_t) |
| 260 | // |
| 261 | // One idea would be to store more than just m_convertedToChar |
| 262 | // in wxString: then we could record the length of the string |
| 263 | // which was converted the last time and try to reuse the same |
| 264 | // buffer if the current length is not greater than it (this |
| 265 | // could still fail because string could have been modified in |
| 266 | // place but it would work most of the time, so we'd do it and |
| 267 | // only allocate the new buffer if in-place conversion returned |
| 268 | // an error). We could also store a bit saying if the string |
| 269 | // was modified since the last conversion (and update it in all |
| 270 | // operation modifying the string, of course) to avoid unneeded |
| 271 | // consequential conversions. But both of these ideas require |
| 272 | // adding more fields to wxString and require profiling results |
| 273 | // to be sure that we really gain enough from them to justify |
| 274 | // doing it. |
| 275 | wxCharBuffer buf(str->mb_str()); |
| 276 | |
| 277 | // if it failed, return empty string and not NULL to avoid crashes in code |
| 278 | // written with either wxWidgets 2 wxString or std::string behaviour in |
| 279 | // mind: neither of them ever returns NULL and so we shouldn't neither |
| 280 | if ( !buf ) |
| 281 | return ""; |
| 282 | |
| 283 | if ( str->m_convertedToChar && |
| 284 | strlen(buf) == strlen(str->m_convertedToChar) ) |
| 285 | { |
| 286 | // keep the same buffer for as long as possible, so that several calls |
| 287 | // to c_str() in a row still work: |
| 288 | strcpy(str->m_convertedToChar, buf); |
| 289 | } |
| 290 | else |
| 291 | { |
| 292 | str->m_convertedToChar = buf.release(); |
| 293 | } |
| 294 | |
| 295 | // and keep it: |
| 296 | return str->m_convertedToChar + m_offset; |
| 297 | } |
| 298 | #endif // wxUSE_UNICODE && !wxUSE_UTF8_LOCALE_ONLY |
| 299 | |
| 300 | #if !wxUSE_UNICODE_WCHAR |
| 301 | const wchar_t* wxCStrData::AsWChar() const |
| 302 | { |
| 303 | wxString *str = wxConstCast(m_str, wxString); |
| 304 | |
| 305 | // convert the string: |
| 306 | wxWCharBuffer buf(str->wc_str()); |
| 307 | |
| 308 | // notice that here, unlike above in AsChar(), conversion can't fail as our |
| 309 | // internal UTF-8 is always well-formed -- or the string was corrupted and |
| 310 | // all bets are off anyhow |
| 311 | |
| 312 | // FIXME-UTF8: do the conversion in-place in the existing buffer |
| 313 | if ( str->m_convertedToWChar && |
| 314 | wxWcslen(buf) == wxWcslen(str->m_convertedToWChar) ) |
| 315 | { |
| 316 | // keep the same buffer for as long as possible, so that several calls |
| 317 | // to c_str() in a row still work: |
| 318 | memcpy(str->m_convertedToWChar, buf, sizeof(wchar_t) * wxWcslen(buf)); |
| 319 | } |
| 320 | else |
| 321 | { |
| 322 | str->m_convertedToWChar = buf.release(); |
| 323 | } |
| 324 | |
| 325 | // and keep it: |
| 326 | return str->m_convertedToWChar + m_offset; |
| 327 | } |
| 328 | #endif // !wxUSE_UNICODE_WCHAR |
| 329 | |
| 330 | // =========================================================================== |
| 331 | // wxString class core |
| 332 | // =========================================================================== |
| 333 | |
| 334 | // --------------------------------------------------------------------------- |
| 335 | // construction and conversion |
| 336 | // --------------------------------------------------------------------------- |
| 337 | |
| 338 | #if wxUSE_UNICODE_WCHAR |
| 339 | /* static */ |
| 340 | wxString::SubstrBufFromMB wxString::ConvertStr(const char *psz, size_t nLength, |
| 341 | const wxMBConv& conv) |
| 342 | { |
| 343 | // anything to do? |
| 344 | if ( !psz || nLength == 0 ) |
| 345 | return SubstrBufFromMB(L"", 0); |
| 346 | |
| 347 | if ( nLength == npos ) |
| 348 | nLength = wxNO_LEN; |
| 349 | |
| 350 | size_t wcLen; |
| 351 | wxWCharBuffer wcBuf(conv.cMB2WC(psz, nLength, &wcLen)); |
| 352 | if ( !wcLen ) |
| 353 | return SubstrBufFromMB(_T(""), 0); |
| 354 | else |
| 355 | return SubstrBufFromMB(wcBuf, wcLen); |
| 356 | } |
| 357 | #endif // wxUSE_UNICODE_WCHAR |
| 358 | |
| 359 | #if wxUSE_UNICODE_UTF8 |
| 360 | /* static */ |
| 361 | wxString::SubstrBufFromMB wxString::ConvertStr(const char *psz, size_t nLength, |
| 362 | const wxMBConv& conv) |
| 363 | { |
| 364 | // anything to do? |
| 365 | if ( !psz || nLength == 0 ) |
| 366 | return SubstrBufFromMB("", 0); |
| 367 | |
| 368 | // if psz is already in UTF-8, we don't have to do the roundtrip to |
| 369 | // wchar_t* and back: |
| 370 | if ( conv.IsUTF8() ) |
| 371 | { |
| 372 | // we need to validate the input because UTF8 iterators assume valid |
| 373 | // UTF-8 sequence and psz may be invalid: |
| 374 | if ( wxStringOperations::IsValidUtf8String(psz, nLength) ) |
| 375 | { |
| 376 | return SubstrBufFromMB(wxCharBuffer::CreateNonOwned(psz), nLength); |
| 377 | } |
| 378 | // else: do the roundtrip through wchar_t* |
| 379 | } |
| 380 | |
| 381 | if ( nLength == npos ) |
| 382 | nLength = wxNO_LEN; |
| 383 | |
| 384 | // first convert to wide string: |
| 385 | size_t wcLen; |
| 386 | wxWCharBuffer wcBuf(conv.cMB2WC(psz, nLength, &wcLen)); |
| 387 | if ( !wcLen ) |
| 388 | return SubstrBufFromMB("", 0); |
| 389 | |
| 390 | // and then to UTF-8: |
| 391 | SubstrBufFromMB buf(ConvertStr(wcBuf, wcLen, wxMBConvStrictUTF8())); |
| 392 | // widechar -> UTF-8 conversion isn't supposed to ever fail: |
| 393 | wxASSERT_MSG( buf.data, _T("conversion to UTF-8 failed") ); |
| 394 | |
| 395 | return buf; |
| 396 | } |
| 397 | #endif // wxUSE_UNICODE_UTF8 |
| 398 | |
| 399 | #if wxUSE_UNICODE_UTF8 || !wxUSE_UNICODE |
| 400 | /* static */ |
| 401 | wxString::SubstrBufFromWC wxString::ConvertStr(const wchar_t *pwz, size_t nLength, |
| 402 | const wxMBConv& conv) |
| 403 | { |
| 404 | // anything to do? |
| 405 | if ( !pwz || nLength == 0 ) |
| 406 | return SubstrBufFromWC("", 0); |
| 407 | |
| 408 | if ( nLength == npos ) |
| 409 | nLength = wxNO_LEN; |
| 410 | |
| 411 | size_t mbLen; |
| 412 | wxCharBuffer mbBuf(conv.cWC2MB(pwz, nLength, &mbLen)); |
| 413 | if ( !mbLen ) |
| 414 | return SubstrBufFromWC("", 0); |
| 415 | else |
| 416 | return SubstrBufFromWC(mbBuf, mbLen); |
| 417 | } |
| 418 | #endif // wxUSE_UNICODE_UTF8 || !wxUSE_UNICODE |
| 419 | |
| 420 | |
| 421 | #if wxUSE_UNICODE_WCHAR |
| 422 | |
| 423 | //Convert wxString in Unicode mode to a multi-byte string |
| 424 | const wxCharBuffer wxString::mb_str(const wxMBConv& conv) const |
| 425 | { |
| 426 | return conv.cWC2MB(wx_str(), length() + 1 /* size, not length */, NULL); |
| 427 | } |
| 428 | |
| 429 | #elif wxUSE_UNICODE_UTF8 |
| 430 | |
| 431 | const wxWCharBuffer wxString::wc_str() const |
| 432 | { |
| 433 | return wxMBConvStrictUTF8().cMB2WC |
| 434 | ( |
| 435 | m_impl.c_str(), |
| 436 | m_impl.length() + 1, // size, not length |
| 437 | NULL |
| 438 | ); |
| 439 | } |
| 440 | |
| 441 | const wxCharBuffer wxString::mb_str(const wxMBConv& conv) const |
| 442 | { |
| 443 | if ( conv.IsUTF8() ) |
| 444 | return wxCharBuffer::CreateNonOwned(m_impl.c_str()); |
| 445 | |
| 446 | // FIXME-UTF8: use wc_str() here once we have buffers with length |
| 447 | |
| 448 | size_t wcLen; |
| 449 | wxWCharBuffer wcBuf(wxMBConvStrictUTF8().cMB2WC |
| 450 | ( |
| 451 | m_impl.c_str(), |
| 452 | m_impl.length() + 1, // size |
| 453 | &wcLen |
| 454 | )); |
| 455 | if ( !wcLen ) |
| 456 | return wxCharBuffer(""); |
| 457 | |
| 458 | return conv.cWC2MB(wcBuf, wcLen+1, NULL); |
| 459 | } |
| 460 | |
| 461 | #else // ANSI |
| 462 | |
| 463 | //Converts this string to a wide character string if unicode |
| 464 | //mode is not enabled and wxUSE_WCHAR_T is enabled |
| 465 | const wxWCharBuffer wxString::wc_str(const wxMBConv& conv) const |
| 466 | { |
| 467 | return conv.cMB2WC(wx_str(), length() + 1 /* size, not length */, NULL); |
| 468 | } |
| 469 | |
| 470 | #endif // Unicode/ANSI |
| 471 | |
| 472 | // shrink to minimal size (releasing extra memory) |
| 473 | bool wxString::Shrink() |
| 474 | { |
| 475 | wxString tmp(begin(), end()); |
| 476 | swap(tmp); |
| 477 | return tmp.length() == length(); |
| 478 | } |
| 479 | |
| 480 | // deprecated compatibility code: |
| 481 | #if WXWIN_COMPATIBILITY_2_8 && !wxUSE_STL_BASED_WXSTRING && !wxUSE_UNICODE_UTF8 |
| 482 | wxStringCharType *wxString::GetWriteBuf(size_t nLen) |
| 483 | { |
| 484 | return DoGetWriteBuf(nLen); |
| 485 | } |
| 486 | |
| 487 | void wxString::UngetWriteBuf() |
| 488 | { |
| 489 | DoUngetWriteBuf(); |
| 490 | } |
| 491 | |
| 492 | void wxString::UngetWriteBuf(size_t nLen) |
| 493 | { |
| 494 | DoUngetWriteBuf(nLen); |
| 495 | } |
| 496 | #endif // WXWIN_COMPATIBILITY_2_8 && !wxUSE_STL_BASED_WXSTRING && !wxUSE_UNICODE_UTF8 |
| 497 | |
| 498 | |
| 499 | // --------------------------------------------------------------------------- |
| 500 | // data access |
| 501 | // --------------------------------------------------------------------------- |
| 502 | |
| 503 | // all functions are inline in string.h |
| 504 | |
| 505 | // --------------------------------------------------------------------------- |
| 506 | // concatenation operators |
| 507 | // --------------------------------------------------------------------------- |
| 508 | |
| 509 | /* |
| 510 | * concatenation functions come in 5 flavours: |
| 511 | * string + string |
| 512 | * char + string and string + char |
| 513 | * C str + string and string + C str |
| 514 | */ |
| 515 | |
| 516 | wxString operator+(const wxString& str1, const wxString& str2) |
| 517 | { |
| 518 | #if !wxUSE_STL_BASED_WXSTRING |
| 519 | wxASSERT( str1.IsValid() ); |
| 520 | wxASSERT( str2.IsValid() ); |
| 521 | #endif |
| 522 | |
| 523 | wxString s = str1; |
| 524 | s += str2; |
| 525 | |
| 526 | return s; |
| 527 | } |
| 528 | |
| 529 | wxString operator+(const wxString& str, wxUniChar ch) |
| 530 | { |
| 531 | #if !wxUSE_STL_BASED_WXSTRING |
| 532 | wxASSERT( str.IsValid() ); |
| 533 | #endif |
| 534 | |
| 535 | wxString s = str; |
| 536 | s += ch; |
| 537 | |
| 538 | return s; |
| 539 | } |
| 540 | |
| 541 | wxString operator+(wxUniChar ch, const wxString& str) |
| 542 | { |
| 543 | #if !wxUSE_STL_BASED_WXSTRING |
| 544 | wxASSERT( str.IsValid() ); |
| 545 | #endif |
| 546 | |
| 547 | wxString s = ch; |
| 548 | s += str; |
| 549 | |
| 550 | return s; |
| 551 | } |
| 552 | |
| 553 | wxString operator+(const wxString& str, const char *psz) |
| 554 | { |
| 555 | #if !wxUSE_STL_BASED_WXSTRING |
| 556 | wxASSERT( str.IsValid() ); |
| 557 | #endif |
| 558 | |
| 559 | wxString s; |
| 560 | if ( !s.Alloc(strlen(psz) + str.length()) ) { |
| 561 | wxFAIL_MSG( _T("out of memory in wxString::operator+") ); |
| 562 | } |
| 563 | s += str; |
| 564 | s += psz; |
| 565 | |
| 566 | return s; |
| 567 | } |
| 568 | |
| 569 | wxString operator+(const wxString& str, const wchar_t *pwz) |
| 570 | { |
| 571 | #if !wxUSE_STL_BASED_WXSTRING |
| 572 | wxASSERT( str.IsValid() ); |
| 573 | #endif |
| 574 | |
| 575 | wxString s; |
| 576 | if ( !s.Alloc(wxWcslen(pwz) + str.length()) ) { |
| 577 | wxFAIL_MSG( _T("out of memory in wxString::operator+") ); |
| 578 | } |
| 579 | s += str; |
| 580 | s += pwz; |
| 581 | |
| 582 | return s; |
| 583 | } |
| 584 | |
| 585 | wxString operator+(const char *psz, const wxString& str) |
| 586 | { |
| 587 | #if !wxUSE_STL_BASED_WXSTRING |
| 588 | wxASSERT( str.IsValid() ); |
| 589 | #endif |
| 590 | |
| 591 | wxString s; |
| 592 | if ( !s.Alloc(strlen(psz) + str.length()) ) { |
| 593 | wxFAIL_MSG( _T("out of memory in wxString::operator+") ); |
| 594 | } |
| 595 | s = psz; |
| 596 | s += str; |
| 597 | |
| 598 | return s; |
| 599 | } |
| 600 | |
| 601 | wxString operator+(const wchar_t *pwz, const wxString& str) |
| 602 | { |
| 603 | #if !wxUSE_STL_BASED_WXSTRING |
| 604 | wxASSERT( str.IsValid() ); |
| 605 | #endif |
| 606 | |
| 607 | wxString s; |
| 608 | if ( !s.Alloc(wxWcslen(pwz) + str.length()) ) { |
| 609 | wxFAIL_MSG( _T("out of memory in wxString::operator+") ); |
| 610 | } |
| 611 | s = pwz; |
| 612 | s += str; |
| 613 | |
| 614 | return s; |
| 615 | } |
| 616 | |
| 617 | // --------------------------------------------------------------------------- |
| 618 | // string comparison |
| 619 | // --------------------------------------------------------------------------- |
| 620 | |
| 621 | bool wxString::IsSameAs(wxUniChar c, bool compareWithCase) const |
| 622 | { |
| 623 | return (length() == 1) && (compareWithCase ? GetChar(0u) == c |
| 624 | : wxToupper(GetChar(0u)) == wxToupper(c)); |
| 625 | } |
| 626 | |
| 627 | #ifdef HAVE_STD_STRING_COMPARE |
| 628 | |
| 629 | // NB: Comparison code (both if HAVE_STD_STRING_COMPARE and if not) works with |
| 630 | // UTF-8 encoded strings too, thanks to UTF-8's design which allows us to |
| 631 | // sort strings in characters code point order by sorting the byte sequence |
| 632 | // in byte values order (i.e. what strcmp() and memcmp() do). |
| 633 | |
| 634 | int wxString::compare(const wxString& str) const |
| 635 | { |
| 636 | return m_impl.compare(str.m_impl); |
| 637 | } |
| 638 | |
| 639 | int wxString::compare(size_t nStart, size_t nLen, |
| 640 | const wxString& str) const |
| 641 | { |
| 642 | size_t pos, len; |
| 643 | PosLenToImpl(nStart, nLen, &pos, &len); |
| 644 | return m_impl.compare(pos, len, str.m_impl); |
| 645 | } |
| 646 | |
| 647 | int wxString::compare(size_t nStart, size_t nLen, |
| 648 | const wxString& str, |
| 649 | size_t nStart2, size_t nLen2) const |
| 650 | { |
| 651 | size_t pos, len; |
| 652 | PosLenToImpl(nStart, nLen, &pos, &len); |
| 653 | |
| 654 | size_t pos2, len2; |
| 655 | str.PosLenToImpl(nStart2, nLen2, &pos2, &len2); |
| 656 | |
| 657 | return m_impl.compare(pos, len, str.m_impl, pos2, len2); |
| 658 | } |
| 659 | |
| 660 | int wxString::compare(const char* sz) const |
| 661 | { |
| 662 | return m_impl.compare(ImplStr(sz)); |
| 663 | } |
| 664 | |
| 665 | int wxString::compare(const wchar_t* sz) const |
| 666 | { |
| 667 | return m_impl.compare(ImplStr(sz)); |
| 668 | } |
| 669 | |
| 670 | int wxString::compare(size_t nStart, size_t nLen, |
| 671 | const char* sz, size_t nCount) const |
| 672 | { |
| 673 | size_t pos, len; |
| 674 | PosLenToImpl(nStart, nLen, &pos, &len); |
| 675 | |
| 676 | SubstrBufFromMB str(ImplStr(sz, nCount)); |
| 677 | |
| 678 | return m_impl.compare(pos, len, str.data, str.len); |
| 679 | } |
| 680 | |
| 681 | int wxString::compare(size_t nStart, size_t nLen, |
| 682 | const wchar_t* sz, size_t nCount) const |
| 683 | { |
| 684 | size_t pos, len; |
| 685 | PosLenToImpl(nStart, nLen, &pos, &len); |
| 686 | |
| 687 | SubstrBufFromWC str(ImplStr(sz, nCount)); |
| 688 | |
| 689 | return m_impl.compare(pos, len, str.data, str.len); |
| 690 | } |
| 691 | |
| 692 | #else // !HAVE_STD_STRING_COMPARE |
| 693 | |
| 694 | static inline int wxDoCmp(const wxStringCharType* s1, size_t l1, |
| 695 | const wxStringCharType* s2, size_t l2) |
| 696 | { |
| 697 | if( l1 == l2 ) |
| 698 | return wxStringMemcmp(s1, s2, l1); |
| 699 | else if( l1 < l2 ) |
| 700 | { |
| 701 | int ret = wxStringMemcmp(s1, s2, l1); |
| 702 | return ret == 0 ? -1 : ret; |
| 703 | } |
| 704 | else |
| 705 | { |
| 706 | int ret = wxStringMemcmp(s1, s2, l2); |
| 707 | return ret == 0 ? +1 : ret; |
| 708 | } |
| 709 | } |
| 710 | |
| 711 | int wxString::compare(const wxString& str) const |
| 712 | { |
| 713 | return ::wxDoCmp(m_impl.data(), m_impl.length(), |
| 714 | str.m_impl.data(), str.m_impl.length()); |
| 715 | } |
| 716 | |
| 717 | int wxString::compare(size_t nStart, size_t nLen, |
| 718 | const wxString& str) const |
| 719 | { |
| 720 | wxASSERT(nStart <= length()); |
| 721 | size_type strLen = length() - nStart; |
| 722 | nLen = strLen < nLen ? strLen : nLen; |
| 723 | |
| 724 | size_t pos, len; |
| 725 | PosLenToImpl(nStart, nLen, &pos, &len); |
| 726 | |
| 727 | return ::wxDoCmp(m_impl.data() + pos, len, |
| 728 | str.m_impl.data(), str.m_impl.length()); |
| 729 | } |
| 730 | |
| 731 | int wxString::compare(size_t nStart, size_t nLen, |
| 732 | const wxString& str, |
| 733 | size_t nStart2, size_t nLen2) const |
| 734 | { |
| 735 | wxASSERT(nStart <= length()); |
| 736 | wxASSERT(nStart2 <= str.length()); |
| 737 | size_type strLen = length() - nStart, |
| 738 | strLen2 = str.length() - nStart2; |
| 739 | nLen = strLen < nLen ? strLen : nLen; |
| 740 | nLen2 = strLen2 < nLen2 ? strLen2 : nLen2; |
| 741 | |
| 742 | size_t pos, len; |
| 743 | PosLenToImpl(nStart, nLen, &pos, &len); |
| 744 | size_t pos2, len2; |
| 745 | str.PosLenToImpl(nStart2, nLen2, &pos2, &len2); |
| 746 | |
| 747 | return ::wxDoCmp(m_impl.data() + pos, len, |
| 748 | str.m_impl.data() + pos2, len2); |
| 749 | } |
| 750 | |
| 751 | int wxString::compare(const char* sz) const |
| 752 | { |
| 753 | SubstrBufFromMB str(ImplStr(sz, npos)); |
| 754 | if ( str.len == npos ) |
| 755 | str.len = wxStringStrlen(str.data); |
| 756 | return ::wxDoCmp(m_impl.data(), m_impl.length(), str.data, str.len); |
| 757 | } |
| 758 | |
| 759 | int wxString::compare(const wchar_t* sz) const |
| 760 | { |
| 761 | SubstrBufFromWC str(ImplStr(sz, npos)); |
| 762 | if ( str.len == npos ) |
| 763 | str.len = wxStringStrlen(str.data); |
| 764 | return ::wxDoCmp(m_impl.data(), m_impl.length(), str.data, str.len); |
| 765 | } |
| 766 | |
| 767 | int wxString::compare(size_t nStart, size_t nLen, |
| 768 | const char* sz, size_t nCount) const |
| 769 | { |
| 770 | wxASSERT(nStart <= length()); |
| 771 | size_type strLen = length() - nStart; |
| 772 | nLen = strLen < nLen ? strLen : nLen; |
| 773 | |
| 774 | size_t pos, len; |
| 775 | PosLenToImpl(nStart, nLen, &pos, &len); |
| 776 | |
| 777 | SubstrBufFromMB str(ImplStr(sz, nCount)); |
| 778 | if ( str.len == npos ) |
| 779 | str.len = wxStringStrlen(str.data); |
| 780 | |
| 781 | return ::wxDoCmp(m_impl.data() + pos, len, str.data, str.len); |
| 782 | } |
| 783 | |
| 784 | int wxString::compare(size_t nStart, size_t nLen, |
| 785 | const wchar_t* sz, size_t nCount) const |
| 786 | { |
| 787 | wxASSERT(nStart <= length()); |
| 788 | size_type strLen = length() - nStart; |
| 789 | nLen = strLen < nLen ? strLen : nLen; |
| 790 | |
| 791 | size_t pos, len; |
| 792 | PosLenToImpl(nStart, nLen, &pos, &len); |
| 793 | |
| 794 | SubstrBufFromWC str(ImplStr(sz, nCount)); |
| 795 | if ( str.len == npos ) |
| 796 | str.len = wxStringStrlen(str.data); |
| 797 | |
| 798 | return ::wxDoCmp(m_impl.data() + pos, len, str.data, str.len); |
| 799 | } |
| 800 | |
| 801 | #endif // HAVE_STD_STRING_COMPARE/!HAVE_STD_STRING_COMPARE |
| 802 | |
| 803 | |
| 804 | // --------------------------------------------------------------------------- |
| 805 | // find_{first,last}_[not]_of functions |
| 806 | // --------------------------------------------------------------------------- |
| 807 | |
| 808 | #if !wxUSE_STL_BASED_WXSTRING || wxUSE_UNICODE_UTF8 |
| 809 | |
| 810 | // NB: All these functions are implemented with the argument being wxChar*, |
| 811 | // i.e. widechar string in any Unicode build, even though native string |
| 812 | // representation is char* in the UTF-8 build. This is because we couldn't |
| 813 | // use memchr() to determine if a character is in a set encoded as UTF-8. |
| 814 | |
| 815 | size_t wxString::find_first_of(const wxChar* sz, size_t nStart) const |
| 816 | { |
| 817 | return find_first_of(sz, nStart, wxStrlen(sz)); |
| 818 | } |
| 819 | |
| 820 | size_t wxString::find_first_not_of(const wxChar* sz, size_t nStart) const |
| 821 | { |
| 822 | return find_first_not_of(sz, nStart, wxStrlen(sz)); |
| 823 | } |
| 824 | |
| 825 | size_t wxString::find_first_of(const wxChar* sz, size_t nStart, size_t n) const |
| 826 | { |
| 827 | wxASSERT_MSG( nStart <= length(), _T("invalid index") ); |
| 828 | |
| 829 | size_t idx = nStart; |
| 830 | for ( const_iterator i = begin() + nStart; i != end(); ++idx, ++i ) |
| 831 | { |
| 832 | if ( wxTmemchr(sz, *i, n) ) |
| 833 | return idx; |
| 834 | } |
| 835 | |
| 836 | return npos; |
| 837 | } |
| 838 | |
| 839 | size_t wxString::find_first_not_of(const wxChar* sz, size_t nStart, size_t n) const |
| 840 | { |
| 841 | wxASSERT_MSG( nStart <= length(), _T("invalid index") ); |
| 842 | |
| 843 | size_t idx = nStart; |
| 844 | for ( const_iterator i = begin() + nStart; i != end(); ++idx, ++i ) |
| 845 | { |
| 846 | if ( !wxTmemchr(sz, *i, n) ) |
| 847 | return idx; |
| 848 | } |
| 849 | |
| 850 | return npos; |
| 851 | } |
| 852 | |
| 853 | |
| 854 | size_t wxString::find_last_of(const wxChar* sz, size_t nStart) const |
| 855 | { |
| 856 | return find_last_of(sz, nStart, wxStrlen(sz)); |
| 857 | } |
| 858 | |
| 859 | size_t wxString::find_last_not_of(const wxChar* sz, size_t nStart) const |
| 860 | { |
| 861 | return find_last_not_of(sz, nStart, wxStrlen(sz)); |
| 862 | } |
| 863 | |
| 864 | size_t wxString::find_last_of(const wxChar* sz, size_t nStart, size_t n) const |
| 865 | { |
| 866 | size_t len = length(); |
| 867 | |
| 868 | if ( nStart == npos ) |
| 869 | { |
| 870 | nStart = len - 1; |
| 871 | } |
| 872 | else |
| 873 | { |
| 874 | wxASSERT_MSG( nStart <= len, _T("invalid index") ); |
| 875 | } |
| 876 | |
| 877 | size_t idx = nStart; |
| 878 | for ( const_reverse_iterator i = rbegin() + (len - nStart - 1); |
| 879 | i != rend(); --idx, ++i ) |
| 880 | { |
| 881 | if ( wxTmemchr(sz, *i, n) ) |
| 882 | return idx; |
| 883 | } |
| 884 | |
| 885 | return npos; |
| 886 | } |
| 887 | |
| 888 | size_t wxString::find_last_not_of(const wxChar* sz, size_t nStart, size_t n) const |
| 889 | { |
| 890 | size_t len = length(); |
| 891 | |
| 892 | if ( nStart == npos ) |
| 893 | { |
| 894 | nStart = len - 1; |
| 895 | } |
| 896 | else |
| 897 | { |
| 898 | wxASSERT_MSG( nStart <= len, _T("invalid index") ); |
| 899 | } |
| 900 | |
| 901 | size_t idx = nStart; |
| 902 | for ( const_reverse_iterator i = rbegin() + (len - nStart - 1); |
| 903 | i != rend(); --idx, ++i ) |
| 904 | { |
| 905 | if ( !wxTmemchr(sz, *i, n) ) |
| 906 | return idx; |
| 907 | } |
| 908 | |
| 909 | return npos; |
| 910 | } |
| 911 | |
| 912 | size_t wxString::find_first_not_of(wxUniChar ch, size_t nStart) const |
| 913 | { |
| 914 | wxASSERT_MSG( nStart <= length(), _T("invalid index") ); |
| 915 | |
| 916 | size_t idx = nStart; |
| 917 | for ( const_iterator i = begin() + nStart; i != end(); ++idx, ++i ) |
| 918 | { |
| 919 | if ( *i != ch ) |
| 920 | return idx; |
| 921 | } |
| 922 | |
| 923 | return npos; |
| 924 | } |
| 925 | |
| 926 | size_t wxString::find_last_not_of(wxUniChar ch, size_t nStart) const |
| 927 | { |
| 928 | size_t len = length(); |
| 929 | |
| 930 | if ( nStart == npos ) |
| 931 | { |
| 932 | nStart = len - 1; |
| 933 | } |
| 934 | else |
| 935 | { |
| 936 | wxASSERT_MSG( nStart <= len, _T("invalid index") ); |
| 937 | } |
| 938 | |
| 939 | size_t idx = nStart; |
| 940 | for ( const_reverse_iterator i = rbegin() + (len - nStart - 1); |
| 941 | i != rend(); --idx, ++i ) |
| 942 | { |
| 943 | if ( *i != ch ) |
| 944 | return idx; |
| 945 | } |
| 946 | |
| 947 | return npos; |
| 948 | } |
| 949 | |
| 950 | // the functions above were implemented for wchar_t* arguments in Unicode |
| 951 | // build and char* in ANSI build; below are implementations for the other |
| 952 | // version: |
| 953 | #if wxUSE_UNICODE |
| 954 | #define wxOtherCharType char |
| 955 | #define STRCONV (const wxChar*)wxConvLibc.cMB2WC |
| 956 | #else |
| 957 | #define wxOtherCharType wchar_t |
| 958 | #define STRCONV (const wxChar*)wxConvLibc.cWC2MB |
| 959 | #endif |
| 960 | |
| 961 | size_t wxString::find_first_of(const wxOtherCharType* sz, size_t nStart) const |
| 962 | { return find_first_of(STRCONV(sz), nStart); } |
| 963 | |
| 964 | size_t wxString::find_first_of(const wxOtherCharType* sz, size_t nStart, |
| 965 | size_t n) const |
| 966 | { return find_first_of(STRCONV(sz, n, NULL), nStart, n); } |
| 967 | size_t wxString::find_last_of(const wxOtherCharType* sz, size_t nStart) const |
| 968 | { return find_last_of(STRCONV(sz), nStart); } |
| 969 | size_t wxString::find_last_of(const wxOtherCharType* sz, size_t nStart, |
| 970 | size_t n) const |
| 971 | { return find_last_of(STRCONV(sz, n, NULL), nStart, n); } |
| 972 | size_t wxString::find_first_not_of(const wxOtherCharType* sz, size_t nStart) const |
| 973 | { return find_first_not_of(STRCONV(sz), nStart); } |
| 974 | size_t wxString::find_first_not_of(const wxOtherCharType* sz, size_t nStart, |
| 975 | size_t n) const |
| 976 | { return find_first_not_of(STRCONV(sz, n, NULL), nStart, n); } |
| 977 | size_t wxString::find_last_not_of(const wxOtherCharType* sz, size_t nStart) const |
| 978 | { return find_last_not_of(STRCONV(sz), nStart); } |
| 979 | size_t wxString::find_last_not_of(const wxOtherCharType* sz, size_t nStart, |
| 980 | size_t n) const |
| 981 | { return find_last_not_of(STRCONV(sz, n, NULL), nStart, n); } |
| 982 | |
| 983 | #undef wxOtherCharType |
| 984 | #undef STRCONV |
| 985 | |
| 986 | #endif // !wxUSE_STL_BASED_WXSTRING || wxUSE_UNICODE_UTF8 |
| 987 | |
| 988 | // =========================================================================== |
| 989 | // other common string functions |
| 990 | // =========================================================================== |
| 991 | |
| 992 | int wxString::CmpNoCase(const wxString& s) const |
| 993 | { |
| 994 | // FIXME-UTF8: use wxUniChar::ToLower/ToUpper once added |
| 995 | |
| 996 | const_iterator i1 = begin(); |
| 997 | const_iterator end1 = end(); |
| 998 | const_iterator i2 = s.begin(); |
| 999 | const_iterator end2 = s.end(); |
| 1000 | |
| 1001 | for ( ; i1 != end1 && i2 != end2; ++i1, ++i2 ) |
| 1002 | { |
| 1003 | wxUniChar lower1 = (wxChar)wxTolower(*i1); |
| 1004 | wxUniChar lower2 = (wxChar)wxTolower(*i2); |
| 1005 | if ( lower1 != lower2 ) |
| 1006 | return lower1 < lower2 ? -1 : 1; |
| 1007 | } |
| 1008 | |
| 1009 | size_t len1 = length(); |
| 1010 | size_t len2 = s.length(); |
| 1011 | |
| 1012 | if ( len1 < len2 ) |
| 1013 | return -1; |
| 1014 | else if ( len1 > len2 ) |
| 1015 | return 1; |
| 1016 | return 0; |
| 1017 | } |
| 1018 | |
| 1019 | |
| 1020 | #if wxUSE_UNICODE |
| 1021 | |
| 1022 | #ifdef __MWERKS__ |
| 1023 | #ifndef __SCHAR_MAX__ |
| 1024 | #define __SCHAR_MAX__ 127 |
| 1025 | #endif |
| 1026 | #endif |
| 1027 | |
| 1028 | wxString wxString::FromAscii(const char *ascii, size_t len) |
| 1029 | { |
| 1030 | if (!ascii || len == 0) |
| 1031 | return wxEmptyString; |
| 1032 | |
| 1033 | wxString res; |
| 1034 | |
| 1035 | { |
| 1036 | wxStringInternalBuffer buf(res, len); |
| 1037 | wxStringCharType *dest = buf; |
| 1038 | |
| 1039 | for ( ; len > 0; --len ) |
| 1040 | { |
| 1041 | unsigned char c = (unsigned char)*ascii++; |
| 1042 | wxASSERT_MSG( c < 0x80, |
| 1043 | _T("Non-ASCII value passed to FromAscii().") ); |
| 1044 | |
| 1045 | *dest++ = (wchar_t)c; |
| 1046 | } |
| 1047 | } |
| 1048 | |
| 1049 | return res; |
| 1050 | } |
| 1051 | |
| 1052 | wxString wxString::FromAscii(const char *ascii) |
| 1053 | { |
| 1054 | return FromAscii(ascii, wxStrlen(ascii)); |
| 1055 | } |
| 1056 | |
| 1057 | wxString wxString::FromAscii(char ascii) |
| 1058 | { |
| 1059 | // What do we do with '\0' ? |
| 1060 | |
| 1061 | unsigned char c = (unsigned char)ascii; |
| 1062 | |
| 1063 | wxASSERT_MSG( c < 0x80, _T("Non-ASCII value passed to FromAscii().") ); |
| 1064 | |
| 1065 | // NB: the cast to wchar_t causes interpretation of 'ascii' as Latin1 value |
| 1066 | return wxString(wxUniChar((wchar_t)c)); |
| 1067 | } |
| 1068 | |
| 1069 | const wxCharBuffer wxString::ToAscii() const |
| 1070 | { |
| 1071 | // this will allocate enough space for the terminating NUL too |
| 1072 | wxCharBuffer buffer(length()); |
| 1073 | char *dest = buffer.data(); |
| 1074 | |
| 1075 | for ( const_iterator i = begin(); i != end(); ++i ) |
| 1076 | { |
| 1077 | wxUniChar c(*i); |
| 1078 | // FIXME-UTF8: unify substituted char ('_') with wxUniChar ('?') |
| 1079 | *dest++ = c.IsAscii() ? (char)c : '_'; |
| 1080 | |
| 1081 | // the output string can't have embedded NULs anyhow, so we can safely |
| 1082 | // stop at first of them even if we do have any |
| 1083 | if ( !c ) |
| 1084 | break; |
| 1085 | } |
| 1086 | |
| 1087 | return buffer; |
| 1088 | } |
| 1089 | |
| 1090 | #endif // wxUSE_UNICODE |
| 1091 | |
| 1092 | // extract string of length nCount starting at nFirst |
| 1093 | wxString wxString::Mid(size_t nFirst, size_t nCount) const |
| 1094 | { |
| 1095 | size_t nLen = length(); |
| 1096 | |
| 1097 | // default value of nCount is npos and means "till the end" |
| 1098 | if ( nCount == npos ) |
| 1099 | { |
| 1100 | nCount = nLen - nFirst; |
| 1101 | } |
| 1102 | |
| 1103 | // out-of-bounds requests return sensible things |
| 1104 | if ( nFirst + nCount > nLen ) |
| 1105 | { |
| 1106 | nCount = nLen - nFirst; |
| 1107 | } |
| 1108 | |
| 1109 | if ( nFirst > nLen ) |
| 1110 | { |
| 1111 | // AllocCopy() will return empty string |
| 1112 | return wxEmptyString; |
| 1113 | } |
| 1114 | |
| 1115 | wxString dest(*this, nFirst, nCount); |
| 1116 | if ( dest.length() != nCount ) |
| 1117 | { |
| 1118 | wxFAIL_MSG( _T("out of memory in wxString::Mid") ); |
| 1119 | } |
| 1120 | |
| 1121 | return dest; |
| 1122 | } |
| 1123 | |
| 1124 | // check that the string starts with prefix and return the rest of the string |
| 1125 | // in the provided pointer if it is not NULL, otherwise return false |
| 1126 | bool wxString::StartsWith(const wxString& prefix, wxString *rest) const |
| 1127 | { |
| 1128 | if ( compare(0, prefix.length(), prefix) != 0 ) |
| 1129 | return false; |
| 1130 | |
| 1131 | if ( rest ) |
| 1132 | { |
| 1133 | // put the rest of the string into provided pointer |
| 1134 | rest->assign(*this, prefix.length(), npos); |
| 1135 | } |
| 1136 | |
| 1137 | return true; |
| 1138 | } |
| 1139 | |
| 1140 | |
| 1141 | // check that the string ends with suffix and return the rest of it in the |
| 1142 | // provided pointer if it is not NULL, otherwise return false |
| 1143 | bool wxString::EndsWith(const wxString& suffix, wxString *rest) const |
| 1144 | { |
| 1145 | int start = length() - suffix.length(); |
| 1146 | |
| 1147 | if ( start < 0 || compare(start, npos, suffix) != 0 ) |
| 1148 | return false; |
| 1149 | |
| 1150 | if ( rest ) |
| 1151 | { |
| 1152 | // put the rest of the string into provided pointer |
| 1153 | rest->assign(*this, 0, start); |
| 1154 | } |
| 1155 | |
| 1156 | return true; |
| 1157 | } |
| 1158 | |
| 1159 | |
| 1160 | // extract nCount last (rightmost) characters |
| 1161 | wxString wxString::Right(size_t nCount) const |
| 1162 | { |
| 1163 | if ( nCount > length() ) |
| 1164 | nCount = length(); |
| 1165 | |
| 1166 | wxString dest(*this, length() - nCount, nCount); |
| 1167 | if ( dest.length() != nCount ) { |
| 1168 | wxFAIL_MSG( _T("out of memory in wxString::Right") ); |
| 1169 | } |
| 1170 | return dest; |
| 1171 | } |
| 1172 | |
| 1173 | // get all characters after the last occurence of ch |
| 1174 | // (returns the whole string if ch not found) |
| 1175 | wxString wxString::AfterLast(wxUniChar ch) const |
| 1176 | { |
| 1177 | wxString str; |
| 1178 | int iPos = Find(ch, true); |
| 1179 | if ( iPos == wxNOT_FOUND ) |
| 1180 | str = *this; |
| 1181 | else |
| 1182 | str = wx_str() + iPos + 1; |
| 1183 | |
| 1184 | return str; |
| 1185 | } |
| 1186 | |
| 1187 | // extract nCount first (leftmost) characters |
| 1188 | wxString wxString::Left(size_t nCount) const |
| 1189 | { |
| 1190 | if ( nCount > length() ) |
| 1191 | nCount = length(); |
| 1192 | |
| 1193 | wxString dest(*this, 0, nCount); |
| 1194 | if ( dest.length() != nCount ) { |
| 1195 | wxFAIL_MSG( _T("out of memory in wxString::Left") ); |
| 1196 | } |
| 1197 | return dest; |
| 1198 | } |
| 1199 | |
| 1200 | // get all characters before the first occurence of ch |
| 1201 | // (returns the whole string if ch not found) |
| 1202 | wxString wxString::BeforeFirst(wxUniChar ch) const |
| 1203 | { |
| 1204 | int iPos = Find(ch); |
| 1205 | if ( iPos == wxNOT_FOUND ) iPos = length(); |
| 1206 | return wxString(*this, 0, iPos); |
| 1207 | } |
| 1208 | |
| 1209 | /// get all characters before the last occurence of ch |
| 1210 | /// (returns empty string if ch not found) |
| 1211 | wxString wxString::BeforeLast(wxUniChar ch) const |
| 1212 | { |
| 1213 | wxString str; |
| 1214 | int iPos = Find(ch, true); |
| 1215 | if ( iPos != wxNOT_FOUND && iPos != 0 ) |
| 1216 | str = wxString(c_str(), iPos); |
| 1217 | |
| 1218 | return str; |
| 1219 | } |
| 1220 | |
| 1221 | /// get all characters after the first occurence of ch |
| 1222 | /// (returns empty string if ch not found) |
| 1223 | wxString wxString::AfterFirst(wxUniChar ch) const |
| 1224 | { |
| 1225 | wxString str; |
| 1226 | int iPos = Find(ch); |
| 1227 | if ( iPos != wxNOT_FOUND ) |
| 1228 | str = wx_str() + iPos + 1; |
| 1229 | |
| 1230 | return str; |
| 1231 | } |
| 1232 | |
| 1233 | // replace first (or all) occurences of some substring with another one |
| 1234 | size_t wxString::Replace(const wxString& strOld, |
| 1235 | const wxString& strNew, bool bReplaceAll) |
| 1236 | { |
| 1237 | // if we tried to replace an empty string we'd enter an infinite loop below |
| 1238 | wxCHECK_MSG( !strOld.empty(), 0, |
| 1239 | _T("wxString::Replace(): invalid parameter") ); |
| 1240 | |
| 1241 | size_t uiCount = 0; // count of replacements made |
| 1242 | |
| 1243 | size_t uiOldLen = strOld.length(); |
| 1244 | size_t uiNewLen = strNew.length(); |
| 1245 | |
| 1246 | size_t dwPos = 0; |
| 1247 | |
| 1248 | while ( (*this)[dwPos] != wxT('\0') ) |
| 1249 | { |
| 1250 | //DO NOT USE STRSTR HERE |
| 1251 | //this string can contain embedded null characters, |
| 1252 | //so strstr will function incorrectly |
| 1253 | dwPos = find(strOld, dwPos); |
| 1254 | if ( dwPos == npos ) |
| 1255 | break; // exit the loop |
| 1256 | else |
| 1257 | { |
| 1258 | //replace this occurance of the old string with the new one |
| 1259 | replace(dwPos, uiOldLen, strNew, uiNewLen); |
| 1260 | |
| 1261 | //move up pos past the string that was replaced |
| 1262 | dwPos += uiNewLen; |
| 1263 | |
| 1264 | //increase replace count |
| 1265 | ++uiCount; |
| 1266 | |
| 1267 | // stop now? |
| 1268 | if ( !bReplaceAll ) |
| 1269 | break; // exit the loop |
| 1270 | } |
| 1271 | } |
| 1272 | |
| 1273 | return uiCount; |
| 1274 | } |
| 1275 | |
| 1276 | bool wxString::IsAscii() const |
| 1277 | { |
| 1278 | for ( const_iterator i = begin(); i != end(); ++i ) |
| 1279 | { |
| 1280 | if ( !(*i).IsAscii() ) |
| 1281 | return false; |
| 1282 | } |
| 1283 | |
| 1284 | return true; |
| 1285 | } |
| 1286 | |
| 1287 | bool wxString::IsWord() const |
| 1288 | { |
| 1289 | for ( const_iterator i = begin(); i != end(); ++i ) |
| 1290 | { |
| 1291 | if ( !wxIsalpha(*i) ) |
| 1292 | return false; |
| 1293 | } |
| 1294 | |
| 1295 | return true; |
| 1296 | } |
| 1297 | |
| 1298 | bool wxString::IsNumber() const |
| 1299 | { |
| 1300 | if ( empty() ) |
| 1301 | return true; |
| 1302 | |
| 1303 | const_iterator i = begin(); |
| 1304 | |
| 1305 | if ( *i == _T('-') || *i == _T('+') ) |
| 1306 | ++i; |
| 1307 | |
| 1308 | for ( ; i != end(); ++i ) |
| 1309 | { |
| 1310 | if ( !wxIsdigit(*i) ) |
| 1311 | return false; |
| 1312 | } |
| 1313 | |
| 1314 | return true; |
| 1315 | } |
| 1316 | |
| 1317 | wxString wxString::Strip(stripType w) const |
| 1318 | { |
| 1319 | wxString s = *this; |
| 1320 | if ( w & leading ) s.Trim(false); |
| 1321 | if ( w & trailing ) s.Trim(true); |
| 1322 | return s; |
| 1323 | } |
| 1324 | |
| 1325 | // --------------------------------------------------------------------------- |
| 1326 | // case conversion |
| 1327 | // --------------------------------------------------------------------------- |
| 1328 | |
| 1329 | wxString& wxString::MakeUpper() |
| 1330 | { |
| 1331 | for ( iterator it = begin(), en = end(); it != en; ++it ) |
| 1332 | *it = (wxChar)wxToupper(*it); |
| 1333 | |
| 1334 | return *this; |
| 1335 | } |
| 1336 | |
| 1337 | wxString& wxString::MakeLower() |
| 1338 | { |
| 1339 | for ( iterator it = begin(), en = end(); it != en; ++it ) |
| 1340 | *it = (wxChar)wxTolower(*it); |
| 1341 | |
| 1342 | return *this; |
| 1343 | } |
| 1344 | |
| 1345 | // --------------------------------------------------------------------------- |
| 1346 | // trimming and padding |
| 1347 | // --------------------------------------------------------------------------- |
| 1348 | |
| 1349 | // some compilers (VC++ 6.0 not to name them) return true for a call to |
| 1350 |