// Licence: wxWindows licence
/////////////////////////////////////////////////////////////////////////////
-/*
- * About ref counting:
- * 1) all empty strings use g_strEmpty, nRefs = -1 (set in Init())
- * 2) AllocBuffer() sets nRefs to 1, Lock() increments it by one
- * 3) Unlock() decrements nRefs and frees memory if it goes to 0
- */
-
// ===========================================================================
// headers, declarations, constants
// ===========================================================================
#ifndef WX_PRECOMP
#include "wx/string.h"
+ #include "wx/wxcrtvararg.h"
#endif
#include <ctype.h>
#include <string.h>
#include <stdlib.h>
-#ifdef __SALFORDC__
- #include <clib.h>
-#endif
-
+#include "wx/hashmap.h"
// string handling functions used by wxString:
#if wxUSE_UNICODE_UTF8
#define wxStringStrlen wxStrlen
#endif
+// ----------------------------------------------------------------------------
+// global variables
+// ----------------------------------------------------------------------------
+
+namespace wxPrivate
+{
+
+static UntypedBufferData s_untypedNullData(NULL);
+
+UntypedBufferData * const untypedNullDataPtr = &s_untypedNullData;
+
+} // namespace wxPrivate
// ---------------------------------------------------------------------------
// static class variables definition
//According to STL _must_ be a -1 size_t
const size_t wxString::npos = (size_t) -1;
+#if wxUSE_STRING_POS_CACHE
+
+#ifdef wxHAS_COMPILER_TLS
+
+wxTLS_TYPE(wxString::Cache) wxString::ms_cache;
+
+#else // !wxHAS_COMPILER_TLS
+
+struct wxStrCacheInitializer
+{
+ wxStrCacheInitializer()
+ {
+ // calling this function triggers s_cache initialization in it, and
+ // from now on it becomes safe to call from multiple threads
+ wxString::GetCache();
+ }
+};
+
+/*
+wxString::Cache& wxString::GetCache()
+{
+ static wxTLS_TYPE(Cache) s_cache;
+
+ return wxTLS_VALUE(s_cache);
+}
+*/
+
+static wxStrCacheInitializer gs_stringCacheInit;
+
+#endif // wxHAS_COMPILER_TLS/!wxHAS_COMPILER_TLS
+
+// gdb seems to be unable to display thread-local variables correctly, at least
+// not my 6.4.98 version under amd64, so provide this debugging helper to do it
+#ifdef __WXDEBUG__
+
+struct wxStrCacheDumper
+{
+ static void ShowAll()
+ {
+ puts("*** wxString cache dump:");
+ for ( unsigned n = 0; n < wxString::Cache::SIZE; n++ )
+ {
+ const wxString::Cache::Element&
+ c = wxString::GetCacheBegin()[n];
+
+ printf("\t%u%s\t%p: pos=(%lu, %lu), len=%ld\n",
+ n,
+ n == wxString::LastUsedCacheElement() ? " [*]" : "",
+ c.str,
+ (unsigned long)c.pos,
+ (unsigned long)c.impl,
+ (long)c.len);
+ }
+ }
+};
+
+void wxDumpStrCache() { wxStrCacheDumper::ShowAll(); }
+
+#endif // __WXDEBUG__
+
+#ifdef wxPROFILE_STRING_CACHE
+
+wxString::CacheStats wxString::ms_cacheStats;
+
+struct wxStrCacheStatsDumper
+{
+ ~wxStrCacheStatsDumper()
+ {
+ const wxString::CacheStats& stats = wxString::ms_cacheStats;
+
+ if ( stats.postot )
+ {
+ puts("*** wxString cache statistics:");
+ printf("\tTotal non-trivial calls to PosToImpl(): %u\n",
+ stats.postot);
+ printf("\tHits %u (of which %u not used) or %.2f%%\n",
+ stats.poshits,
+ stats.mishits,
+ 100.*float(stats.poshits - stats.mishits)/stats.postot);
+ printf("\tAverage position requested: %.2f\n",
+ float(stats.sumpos) / stats.postot);
+ printf("\tAverage offset after cached hint: %.2f\n",
+ float(stats.sumofs) / stats.postot);
+ }
+
+ if ( stats.lentot )
+ {
+ printf("\tNumber of calls to length(): %u, hits=%.2f%%\n",
+ stats.lentot, 100.*float(stats.lenhits)/stats.lentot);
+ }
+ }
+};
+
+static wxStrCacheStatsDumper s_showCacheStats;
+
+#endif // wxPROFILE_STRING_CACHE
+
+#endif // wxUSE_STRING_POS_CACHE
+
// ----------------------------------------------------------------------------
// global functions
// ----------------------------------------------------------------------------
wxSTD ostream& operator<<(wxSTD ostream& os, const wxCStrData& str)
{
-// FIXME-UTF8: always, not only if wxUSE_UNICODE
-#if wxUSE_UNICODE && !defined(__BORLANDC__)
- return os << str.AsWChar();
+#if wxUSE_UNICODE && !wxUSE_UNICODE_UTF8
+ const wxCharBuffer buf(str.AsCharBuf());
+ if ( !buf )
+ os.clear(wxSTD ios_base::failbit);
+ else
+ os << buf.data();
+
+ return os;
#else
- return os << str.AsChar();
+ return os << str.AsInternal();
#endif
}
}
#endif
+#if wxUSE_UNICODE && defined(HAVE_WOSTREAM)
+
+wxSTD wostream& operator<<(wxSTD wostream& wos, const wxString& str)
+{
+ return wos << str.wc_str();
+}
+
+wxSTD wostream& operator<<(wxSTD wostream& wos, const wxCStrData& str)
+{
+ return wos << str.AsWChar();
+}
+
+wxSTD wostream& operator<<(wxSTD wostream& wos, const wxWCharBuffer& str)
+{
+ return wos << str.data();
+}
+
+#endif // wxUSE_UNICODE && defined(HAVE_WOSTREAM)
+
#endif // wxUSE_STD_IOSTREAM
// ===========================================================================
// wxString class core
// ===========================================================================
+#if wxUSE_UNICODE_UTF8
+
+void wxString::PosLenToImpl(size_t pos, size_t len,
+ size_t *implPos, size_t *implLen) const
+{
+ if ( pos == npos )
+ {
+ *implPos = npos;
+ }
+ else // have valid start position
+ {
+ const const_iterator b = GetIterForNthChar(pos);
+ *implPos = wxStringImpl::const_iterator(b.impl()) - m_impl.begin();
+ if ( len == npos )
+ {
+ *implLen = npos;
+ }
+ else // have valid length too
+ {
+ // we need to handle the case of length specifying a substring
+ // going beyond the end of the string, just as std::string does
+ const const_iterator e(end());
+ const_iterator i(b);
+ while ( len && i <= e )
+ {
+ ++i;
+ --len;
+ }
+
+ *implLen = i.impl() - b.impl();
+ }
+ }
+}
+
+#endif // wxUSE_UNICODE_UTF8
+
+// ----------------------------------------------------------------------------
+// wxCStrData converted strings caching
+// ----------------------------------------------------------------------------
+
+// FIXME-UTF8: temporarily disabled because it doesn't work with global
+// string objects; re-enable after fixing this bug and benchmarking
+// performance to see if using a hash is a good idea at all
+#if 0
+
+// For backward compatibility reasons, it must be possible to assign the value
+// returned by wxString::c_str() to a char* or wchar_t* variable and work with
+// it. Returning wxCharBuffer from (const char*)c_str() wouldn't do the trick,
+// because the memory would be freed immediately, but it has to be valid as long
+// as the string is not modified, so that code like this still works:
+//
+// const wxChar *s = str.c_str();
+// while ( s ) { ... }
+
+// FIXME-UTF8: not thread safe!
+// FIXME-UTF8: we currently clear the cached conversion only when the string is
+// destroyed, but we should do it when the string is modified, to
+// keep memory usage down
+// FIXME-UTF8: we do the conversion every time As[W]Char() is called, but if we
+// invalidated the cache on every change, we could keep the previous
+// conversion
+// FIXME-UTF8: add tracing of usage of these two methods - new code is supposed
+// to use mb_str() or wc_str() instead of (const [w]char*)c_str()
+
+template<typename T>
+static inline void DeleteStringFromConversionCache(T& hash, const wxString *s)
+{
+ typename T::iterator i = hash.find(wxConstCast(s, wxString));
+ if ( i != hash.end() )
+ {
+ free(i->second);
+ hash.erase(i);
+ }
+}
+
+#if wxUSE_UNICODE
+// NB: non-STL implementation doesn't compile with "const wxString*" key type,
+// so we have to use wxString* here and const-cast when used
+WX_DECLARE_HASH_MAP(wxString*, char*, wxPointerHash, wxPointerEqual,
+ wxStringCharConversionCache);
+static wxStringCharConversionCache gs_stringsCharCache;
+
+const char* wxCStrData::AsChar() const
+{
+ // remove previously cache value, if any (see FIXMEs above):
+ DeleteStringFromConversionCache(gs_stringsCharCache, m_str);
+
+ // convert the string and keep it:
+ const char *s = gs_stringsCharCache[wxConstCast(m_str, wxString)] =
+ m_str->mb_str().release();
+
+ return s + m_offset;
+}
+#endif // wxUSE_UNICODE
+
+#if !wxUSE_UNICODE_WCHAR
+WX_DECLARE_HASH_MAP(wxString*, wchar_t*, wxPointerHash, wxPointerEqual,
+ wxStringWCharConversionCache);
+static wxStringWCharConversionCache gs_stringsWCharCache;
+
+const wchar_t* wxCStrData::AsWChar() const
+{
+ // remove previously cache value, if any (see FIXMEs above):
+ DeleteStringFromConversionCache(gs_stringsWCharCache, m_str);
+
+ // convert the string and keep it:
+ const wchar_t *s = gs_stringsWCharCache[wxConstCast(m_str, wxString)] =
+ m_str->wc_str().release();
+
+ return s + m_offset;
+}
+#endif // !wxUSE_UNICODE_WCHAR
+
+wxString::~wxString()
+{
+#if wxUSE_UNICODE
+ // FIXME-UTF8: do this only if locale is not UTF8 if wxUSE_UNICODE_UTF8
+ DeleteStringFromConversionCache(gs_stringsCharCache, this);
+#endif
+#if !wxUSE_UNICODE_WCHAR
+ DeleteStringFromConversionCache(gs_stringsWCharCache, this);
+#endif
+}
+#endif
+
+#if wxUSE_UNICODE && !wxUSE_UTF8_LOCALE_ONLY
+const char* wxCStrData::AsChar() const
+{
+#if wxUSE_UNICODE_UTF8
+ if ( wxLocaleIsUtf8 )
+ return AsInternal();
+#endif
+ // under non-UTF8 locales, we have to convert the internal UTF-8
+ // representation using wxConvLibc and cache the result
+
+ wxString *str = wxConstCast(m_str, wxString);
+
+ // convert the string:
+ //
+ // FIXME-UTF8: we'd like to do the conversion in the existing buffer (if we
+ // have it) but it's unfortunately not obvious to implement
+ // because we don't know how big buffer do we need for the
+ // given string length (in case of multibyte encodings, e.g.
+ // ISO-2022-JP or UTF-8 when internal representation is wchar_t)
+ //
+ // One idea would be to store more than just m_convertedToChar
+ // in wxString: then we could record the length of the string
+ // which was converted the last time and try to reuse the same
+ // buffer if the current length is not greater than it (this
+ // could still fail because string could have been modified in
+ // place but it would work most of the time, so we'd do it and
+ // only allocate the new buffer if in-place conversion returned
+ // an error). We could also store a bit saying if the string
+ // was modified since the last conversion (and update it in all
+ // operation modifying the string, of course) to avoid unneeded
+ // consequential conversions. But both of these ideas require
+ // adding more fields to wxString and require profiling results
+ // to be sure that we really gain enough from them to justify
+ // doing it.
+ wxCharBuffer buf(str->mb_str());
+
+ // if it failed, return empty string and not NULL to avoid crashes in code
+ // written with either wxWidgets 2 wxString or std::string behaviour in
+ // mind: neither of them ever returns NULL and so we shouldn't neither
+ if ( !buf )
+ return "";
+
+ if ( str->m_convertedToChar &&
+ strlen(buf) == strlen(str->m_convertedToChar) )
+ {
+ // keep the same buffer for as long as possible, so that several calls
+ // to c_str() in a row still work:
+ strcpy(str->m_convertedToChar, buf);
+ }
+ else
+ {
+ str->m_convertedToChar = buf.release();
+ }
+
+ // and keep it:
+ return str->m_convertedToChar + m_offset;
+}
+#endif // wxUSE_UNICODE && !wxUSE_UTF8_LOCALE_ONLY
+
+#if !wxUSE_UNICODE_WCHAR
+const wchar_t* wxCStrData::AsWChar() const
+{
+ wxString *str = wxConstCast(m_str, wxString);
+
+ // convert the string:
+ wxWCharBuffer buf(str->wc_str());
+
+ // notice that here, unlike above in AsChar(), conversion can't fail as our
+ // internal UTF-8 is always well-formed -- or the string was corrupted and
+ // all bets are off anyhow
+
+ // FIXME-UTF8: do the conversion in-place in the existing buffer
+ if ( str->m_convertedToWChar &&
+ wxWcslen(buf) == wxWcslen(str->m_convertedToWChar) )
+ {
+ // keep the same buffer for as long as possible, so that several calls
+ // to c_str() in a row still work:
+ memcpy(str->m_convertedToWChar, buf, sizeof(wchar_t) * wxWcslen(buf));
+ }
+ else
+ {
+ str->m_convertedToWChar = buf.release();
+ }
+
+ // and keep it:
+ return str->m_convertedToWChar + m_offset;
+}
+#endif // !wxUSE_UNICODE_WCHAR
+
+// ===========================================================================
+// wxString class core
+// ===========================================================================
+
// ---------------------------------------------------------------------------
// construction and conversion
// ---------------------------------------------------------------------------
-#if wxUSE_UNICODE
+#if wxUSE_UNICODE_WCHAR
/* static */
wxString::SubstrBufFromMB wxString::ConvertStr(const char *psz, size_t nLength,
const wxMBConv& conv)
{
// anything to do?
if ( !psz || nLength == 0 )
- return SubstrBufFromMB();
+ return SubstrBufFromMB(L"", 0);
if ( nLength == npos )
nLength = wxNO_LEN;
size_t wcLen;
wxWCharBuffer wcBuf(conv.cMB2WC(psz, nLength, &wcLen));
if ( !wcLen )
- return SubstrBufFromMB();
+ return SubstrBufFromMB(_T(""), 0);
else
return SubstrBufFromMB(wcBuf, wcLen);
}
-#else
+#endif // wxUSE_UNICODE_WCHAR
+
+#if wxUSE_UNICODE_UTF8
+/* static */
+wxString::SubstrBufFromMB wxString::ConvertStr(const char *psz, size_t nLength,
+ const wxMBConv& conv)
+{
+ // anything to do?
+ if ( !psz || nLength == 0 )
+ return SubstrBufFromMB("", 0);
+
+ // if psz is already in UTF-8, we don't have to do the roundtrip to
+ // wchar_t* and back:
+ if ( conv.IsUTF8() )
+ {
+ // we need to validate the input because UTF8 iterators assume valid
+ // UTF-8 sequence and psz may be invalid:
+ if ( wxStringOperations::IsValidUtf8String(psz, nLength) )
+ {
+ // we must pass the real string length to SubstrBufFromMB ctor
+ if ( nLength == npos )
+ nLength = psz ? strlen(psz) : 0;
+ return SubstrBufFromMB(wxCharBuffer::CreateNonOwned(psz), nLength);
+ }
+ // else: do the roundtrip through wchar_t*
+ }
+
+ if ( nLength == npos )
+ nLength = wxNO_LEN;
+
+ // first convert to wide string:
+ size_t wcLen;
+ wxWCharBuffer wcBuf(conv.cMB2WC(psz, nLength, &wcLen));
+ if ( !wcLen )
+ return SubstrBufFromMB("", 0);
+
+ // and then to UTF-8:
+ SubstrBufFromMB buf(ConvertStr(wcBuf, wcLen, wxMBConvStrictUTF8()));
+ // widechar -> UTF-8 conversion isn't supposed to ever fail:
+ wxASSERT_MSG( buf.data, _T("conversion to UTF-8 failed") );
+
+ return buf;
+}
+#endif // wxUSE_UNICODE_UTF8
+
+#if wxUSE_UNICODE_UTF8 || !wxUSE_UNICODE
/* static */
wxString::SubstrBufFromWC wxString::ConvertStr(const wchar_t *pwz, size_t nLength,
const wxMBConv& conv)
{
// anything to do?
if ( !pwz || nLength == 0 )
- return SubstrBufFromWC();
+ return SubstrBufFromWC("", 0);
if ( nLength == npos )
nLength = wxNO_LEN;
size_t mbLen;
wxCharBuffer mbBuf(conv.cWC2MB(pwz, nLength, &mbLen));
if ( !mbLen )
- return SubstrBufFromWC();
+ return SubstrBufFromWC("", 0);
else
return SubstrBufFromWC(mbBuf, mbLen);
}
-#endif
+#endif // wxUSE_UNICODE_UTF8 || !wxUSE_UNICODE
-#if wxUSE_UNICODE
+#if wxUSE_UNICODE_WCHAR
//Convert wxString in Unicode mode to a multi-byte string
const wxCharBuffer wxString::mb_str(const wxMBConv& conv) const
{
- return conv.cWC2MB(c_str(), length() + 1 /* size, not length */, NULL);
+ return conv.cWC2MB(wx_str(), length() + 1 /* size, not length */, NULL);
}
-#else // ANSI
+#elif wxUSE_UNICODE_UTF8
+
+const wxWCharBuffer wxString::wc_str() const
+{
+ return wxMBConvStrictUTF8().cMB2WC
+ (
+ m_impl.c_str(),
+ m_impl.length() + 1, // size, not length
+ NULL
+ );
+}
+
+const wxCharBuffer wxString::mb_str(const wxMBConv& conv) const
+{
+ if ( conv.IsUTF8() )
+ return wxCharBuffer::CreateNonOwned(m_impl.c_str());
+
+ // FIXME-UTF8: use wc_str() here once we have buffers with length
-#if wxUSE_WCHAR_T
+ size_t wcLen;
+ wxWCharBuffer wcBuf(wxMBConvStrictUTF8().cMB2WC
+ (
+ m_impl.c_str(),
+ m_impl.length() + 1, // size
+ &wcLen
+ ));
+ if ( !wcLen )
+ return wxCharBuffer("");
+
+ return conv.cWC2MB(wcBuf, wcLen+1, NULL);
+}
+
+#else // ANSI
//Converts this string to a wide character string if unicode
//mode is not enabled and wxUSE_WCHAR_T is enabled
const wxWCharBuffer wxString::wc_str(const wxMBConv& conv) const
{
- return conv.cMB2WC(c_str(), length() + 1 /* size, not length */, NULL);
+ return conv.cMB2WC(wx_str(), length() + 1 /* size, not length */, NULL);
}
-#endif // wxUSE_WCHAR_T
-
#endif // Unicode/ANSI
// shrink to minimal size (releasing extra memory)
// deprecated compatibility code:
#if WXWIN_COMPATIBILITY_2_8 && !wxUSE_STL_BASED_WXSTRING && !wxUSE_UNICODE_UTF8
-wxChar *wxString::GetWriteBuf(size_t nLen)
+wxStringCharType *wxString::GetWriteBuf(size_t nLen)
{
return DoGetWriteBuf(nLen);
}
// string comparison
// ---------------------------------------------------------------------------
+bool wxString::IsSameAs(wxUniChar c, bool compareWithCase) const
+{
+ return (length() == 1) && (compareWithCase ? GetChar(0u) == c
+ : wxToupper(GetChar(0u)) == wxToupper(c));
+}
+
#ifdef HAVE_STD_STRING_COMPARE
// NB: Comparison code (both if HAVE_STD_STRING_COMPARE and if not) works with
{
// FIXME-UTF8: use wxUniChar::ToLower/ToUpper once added
- size_t idx = 0;
const_iterator i1 = begin();
const_iterator end1 = end();
const_iterator i2 = s.begin();
const_iterator end2 = s.end();
- for ( ; i1 != end1 && i2 != end2; ++idx, ++i1, ++i2 )
+ for ( ; i1 != end1 && i2 != end2; ++i1, ++i2 )
{
wxUniChar lower1 = (wxChar)wxTolower(*i1);
wxUniChar lower2 = (wxChar)wxTolower(*i2);
#endif
#endif
-wxString wxString::FromAscii(const char *ascii)
+wxString wxString::FromAscii(const char *ascii, size_t len)
{
- if (!ascii)
+ if (!ascii || len == 0)
return wxEmptyString;
- size_t len = strlen( ascii );
wxString res;
- if ( len )
{
- wxStringBuffer buf(res, len);
-
- wchar_t *dest = buf;
+ wxStringInternalBuffer buf(res, len);
+ wxStringCharType *dest = buf;
- for ( ;; )
+ for ( ; len > 0; --len )
{
- if ( (*dest++ = (wchar_t)(unsigned char)*ascii++) == L'\0' )
- break;
+ unsigned char c = (unsigned char)*ascii++;
+ wxASSERT_MSG( c < 0x80,
+ _T("Non-ASCII value passed to FromAscii().") );
+
+ *dest++ = (wchar_t)c;
}
}
return res;
}
-wxString wxString::FromAscii(const char ascii)
+wxString wxString::FromAscii(const char *ascii)
+{
+ return FromAscii(ascii, wxStrlen(ascii));
+}
+
+wxString wxString::FromAscii(char ascii)
{
// What do we do with '\0' ?
- wxString res;
- res += (wchar_t)(unsigned char) ascii;
+ unsigned char c = (unsigned char)ascii;
- return res;
+ wxASSERT_MSG( c < 0x80, _T("Non-ASCII value passed to FromAscii().") );
+
+ // NB: the cast to wchar_t causes interpretation of 'ascii' as Latin1 value
+ return wxString(wxUniChar((wchar_t)c));
}
const wxCharBuffer wxString::ToAscii() const
{
// this will allocate enough space for the terminating NUL too
wxCharBuffer buffer(length());
-
-
char *dest = buffer.data();
- const wchar_t *pwc = c_str();
- for ( ;; )
+ for ( const_iterator i = begin(); i != end(); ++i )
{
- *dest++ = (char)(*pwc > SCHAR_MAX ? wxT('_') : *pwc);
+ wxUniChar c(*i);
+ // FIXME-UTF8: unify substituted char ('_') with wxUniChar ('?')
+ *dest++ = c.IsAscii() ? (char)c : '_';
// the output string can't have embedded NULs anyhow, so we can safely
// stop at first of them even if we do have any
- if ( !*pwc++ )
+ if ( !c )
break;
}
return buffer;
}
-#endif // Unicode
+#endif // wxUSE_UNICODE
// extract string of length nCount starting at nFirst
wxString wxString::Mid(size_t nFirst, size_t nCount) const
// check that the string starts with prefix and return the rest of the string
// in the provided pointer if it is not NULL, otherwise return false
-bool wxString::StartsWith(const wxChar *prefix, wxString *rest) const
+bool wxString::StartsWith(const wxString& prefix, wxString *rest) const
{
- wxASSERT_MSG( prefix, _T("invalid parameter in wxString::StartsWith") );
-
- // first check if the beginning of the string matches the prefix: note
- // that we don't have to check that we don't run out of this string as
- // when we reach the terminating NUL, either prefix string ends too (and
- // then it's ok) or we break out of the loop because there is no match
- const wxChar *p = c_str();
- while ( *prefix )
- {
- if ( *prefix++ != *p++ )
- {
- // no match
- return false;
- }
- }
+ if ( compare(0, prefix.length(), prefix) != 0 )
+ return false;
if ( rest )
{
// put the rest of the string into provided pointer
- *rest = p;
+ rest->assign(*this, prefix.length(), npos);
}
return true;
// check that the string ends with suffix and return the rest of it in the
// provided pointer if it is not NULL, otherwise return false
-bool wxString::EndsWith(const wxChar *suffix, wxString *rest) const
+bool wxString::EndsWith(const wxString& suffix, wxString *rest) const
{
- wxASSERT_MSG( suffix, _T("invalid parameter in wxString::EndssWith") );
+ int start = length() - suffix.length();
- int start = length() - wxStrlen(suffix);
- if ( start < 0 || wxStrcmp(wx_str() + start, suffix) != 0 )
+ if ( start < 0 || compare(start, npos, suffix) != 0 )
return false;
if ( rest )
return dest;
}
-// get all characters after the last occurence of ch
+// get all characters after the last occurrence of ch
// (returns the whole string if ch not found)
wxString wxString::AfterLast(wxUniChar ch) const
{
if ( iPos == wxNOT_FOUND )
str = *this;
else
- str = wx_str() + iPos + 1;
+ str.assign(*this, iPos + 1, npos);
return str;
}
return dest;
}
-// get all characters before the first occurence of ch
+// get all characters before the first occurrence of ch
// (returns the whole string if ch not found)
wxString wxString::BeforeFirst(wxUniChar ch) const
{
int iPos = Find(ch);
- if ( iPos == wxNOT_FOUND ) iPos = length();
+ if ( iPos == wxNOT_FOUND )
+ iPos = length();
return wxString(*this, 0, iPos);
}
-/// get all characters before the last occurence of ch
+/// get all characters before the last occurrence of ch
/// (returns empty string if ch not found)
wxString wxString::BeforeLast(wxUniChar ch) const
{
return str;
}
-/// get all characters after the first occurence of ch
+/// get all characters after the first occurrence of ch
/// (returns empty string if ch not found)
wxString wxString::AfterFirst(wxUniChar ch) const
{
wxString str;
int iPos = Find(ch);
if ( iPos != wxNOT_FOUND )
- str = wx_str() + iPos + 1;
+ str.assign(*this, iPos + 1, npos);
return str;
}
-// replace first (or all) occurences of some substring with another one
+// replace first (or all) occurrences of some substring with another one
size_t wxString::Replace(const wxString& strOld,
const wxString& strNew, bool bReplaceAll)
{
wxCHECK_MSG( !strOld.empty(), 0,
_T("wxString::Replace(): invalid parameter") );
+ wxSTRING_INVALIDATE_CACHE();
+
size_t uiCount = 0; // count of replacements made
- size_t uiOldLen = strOld.length();
- size_t uiNewLen = strNew.length();
+ // optimize the special common case: replacement of one character by
+ // another one (in UTF-8 case we can only do this for ASCII characters)
+ //
+ // benchmarks show that this special version is around 3 times faster
+ // (depending on the proportion of matching characters and UTF-8/wchar_t
+ // build)
+ if ( strOld.m_impl.length() == 1 && strNew.m_impl.length() == 1 )
+ {
+ const wxStringCharType chOld = strOld.m_impl[0],
+ chNew = strNew.m_impl[0];
+
+ // this loop is the simplified version of the one below
+ for ( size_t pos = 0; ; )
+ {
+ pos = m_impl.find(chOld, pos);
+ if ( pos == npos )
+ break;
+
+ m_impl[pos++] = chNew;
- size_t dwPos = 0;
+ uiCount++;
- while ( (*this)[dwPos] != wxT('\0') )
+ if ( !bReplaceAll )
+ break;
+ }
+ }
+ else // general case
{
- //DO NOT USE STRSTR HERE
- //this string can contain embedded null characters,
- //so strstr will function incorrectly
- dwPos = find(strOld, dwPos);
- if ( dwPos == npos )
- break; // exit the loop
- else
+ const size_t uiOldLen = strOld.m_impl.length();
+ const size_t uiNewLen = strNew.m_impl.length();
+
+ for ( size_t pos = 0; ; )
{
- //replace this occurance of the old string with the new one
- replace(dwPos, uiOldLen, strNew, uiNewLen);
+ pos = m_impl.find(strOld.m_impl, pos);
+ if ( pos == npos )
+ break;
- //move up pos past the string that was replaced
- dwPos += uiNewLen;
+ // replace this occurrence of the old string with the new one
+ m_impl.replace(pos, uiOldLen, strNew.m_impl);
- //increase replace count
- ++uiCount;
+ // move up pos past the string that was replaced
+ pos += uiNewLen;
- // stop now?
+ // increase replace count
+ uiCount++;
+
+ // stop after the first one?
if ( !bReplaceAll )
- break; // exit the loop
+ break;
}
}
bool wxString::IsAscii() const
{
- const wxChar *s = (const wxChar*) *this;
- while(*s){
- if(!isascii(*s)) return(false);
- s++;
- }
- return(true);
+ for ( const_iterator i = begin(); i != end(); ++i )
+ {
+ if ( !(*i).IsAscii() )
+ return false;
+ }
+
+ return true;
}
bool wxString::IsWord() const
{
- const wxChar *s = (const wxChar*) *this;
- while(*s){
- if(!wxIsalpha(*s)) return(false);
- s++;
- }
- return(true);
+ for ( const_iterator i = begin(); i != end(); ++i )
+ {
+ if ( !wxIsalpha(*i) )
+ return false;
+ }
+
+ return true;
}
bool wxString::IsNumber() const
{
- const wxChar *s = (const wxChar*) *this;
- if (wxStrlen(s))
- if ((s[0] == wxT('-')) || (s[0] == wxT('+'))) s++;
- while(*s){
- if(!wxIsdigit(*s)) return(false);
- s++;
- }
- return(true);
+ if ( empty() )
+ return true;
+
+ const_iterator i = begin();
+
+ if ( *i == _T('-') || *i == _T('+') )
+ ++i;
+
+ for ( ; i != end(); ++i )
+ {
+ if ( !wxIsdigit(*i) )
+ return false;
+ }
+
+ return true;
}
wxString wxString::Strip(stripType w) const
return *this;
}
+wxString& wxString::MakeCapitalized()
+{
+ const iterator en = end();
+ iterator it = begin();
+ if ( it != en )
+ {
+ *it = (wxChar)wxToupper(*it);
+ for ( ++it; it != en; ++it )
+ *it = (wxChar)wxTolower(*it);
+ }
+
+ return *this;
+}
+
// ---------------------------------------------------------------------------
// trimming and padding
// ---------------------------------------------------------------------------
// some compilers (VC++ 6.0 not to name them) return true for a call to
-// isspace('ê') in the C locale which seems to be broken to me, but we have to
-// live with this by checking that the character is a 7 bit one - even if this
-// may fail to detect some spaces (I don't know if Unicode doesn't have
+// isspace('\xEA') in the C locale which seems to be broken to me, but we have
+// to live with this by checking that the character is a 7 bit one - even if
+// this may fail to detect some spaces (I don't know if Unicode doesn't have
// space-like symbols somewhere except in the first 128 chars), it is arguably
// still better than trimming away accented letters
inline int wxSafeIsspace(wxChar ch) { return (ch < 127) && wxIsspace(ch); }
// find last non-space character
reverse_iterator psz = rbegin();
while ( (psz != rend()) && wxSafeIsspace(*psz) )
- psz++;
+ ++psz;
// truncate at trailing space start
erase(psz.base(), end());
// find first non-space character
iterator psz = begin();
while ( (psz != end()) && wxSafeIsspace(*psz) )
- psz++;
+ ++psz;
// fix up data and length
erase(begin(), psz);
// conversion to numbers
// ----------------------------------------------------------------------------
-// the implementation of all the functions below is exactly the same so factor
-// it out
-
-template <typename T, typename F>
-bool wxStringToIntType(const wxChar *start,
- T *val,
- int base,
- F func)
-{
- wxCHECK_MSG( val, false, _T("NULL output pointer") );
- wxASSERT_MSG( !base || (base > 1 && base <= 36), _T("invalid base") );
+// The implementation of all the functions below is exactly the same so factor
+// it out. Note that number extraction works correctly on UTF-8 strings, so
+// we can use wxStringCharType and wx_str() for maximum efficiency.
#ifndef __WXWINCE__
- errno = 0;
+ #define DO_IF_NOT_WINCE(x) x
+#else
+ #define DO_IF_NOT_WINCE(x)
#endif
- wxChar *end;
- *val = (*func)(start, &end, base);
-
- // return true only if scan was stopped by the terminating NUL and if the
- // string was not empty to start with and no under/overflow occurred
- return !*end && (end != start)
-#ifndef __WXWINCE__
- && (errno != ERANGE)
-#endif
- ;
-}
+#define WX_STRING_TO_INT_TYPE(out, base, func, T) \
+ wxCHECK_MSG( out, false, _T("NULL output pointer") ); \
+ wxASSERT_MSG( !base || (base > 1 && base <= 36), _T("invalid base") ); \
+ \
+ DO_IF_NOT_WINCE( errno = 0; ) \
+ \
+ const wxStringCharType *start = wx_str(); \
+ wxStringCharType *end; \
+ T val = func(start, &end, base); \
+ \
+ /* return true only if scan was stopped by the terminating NUL and */ \
+ /* if the string was not empty to start with and no under/overflow */ \
+ /* occurred: */ \
+ if ( *end || end == start DO_IF_NOT_WINCE(|| errno == ERANGE) ) \
+ return false; \
+ *out = val; \
+ return true
-bool wxString::ToLong(long *val, int base) const
+bool wxString::ToLong(long *pVal, int base) const
{
- return wxStringToIntType((const wxChar*)c_str(), val, base, wxStrtol);
+ WX_STRING_TO_INT_TYPE(pVal, base, wxStrtol, long);
}
-bool wxString::ToULong(unsigned long *val, int base) const
+bool wxString::ToULong(unsigned long *pVal, int base) const
{
- return wxStringToIntType((const wxChar*)c_str(), val, base, wxStrtoul);
+ WX_STRING_TO_INT_TYPE(pVal, base, wxStrtoul, unsigned long);
}
-bool wxString::ToLongLong(wxLongLong_t *val, int base) const
+bool wxString::ToLongLong(wxLongLong_t *pVal, int base) const
{
-#ifdef wxHAS_STRTOLL
- return wxStringToIntType((const wxChar*)c_str(), val, base, wxStrtoll);
-#else
- // TODO: implement this ourselves
- wxUnusedVar(val);
- wxUnusedVar(base);
- return false;
-#endif // wxHAS_STRTOLL
+ WX_STRING_TO_INT_TYPE(pVal, base, wxStrtoll, wxLongLong_t);
}
-bool wxString::ToULongLong(wxULongLong_t *val, int base) const
+bool wxString::ToULongLong(wxULongLong_t *pVal, int base) const
{
-#ifdef wxHAS_STRTOLL
- return wxStringToIntType((const wxChar*)c_str(), val, base, wxStrtoull);
-#else
- // TODO: implement this ourselves
- wxUnusedVar(val);
- wxUnusedVar(base);
- return false;
-#endif
+ WX_STRING_TO_INT_TYPE(pVal, base, wxStrtoull, wxULongLong_t);
}
-bool wxString::ToDouble(double *val) const
+bool wxString::ToDouble(double *pVal) const
{
- wxCHECK_MSG( val, false, _T("NULL pointer in wxString::ToDouble") );
+ wxCHECK_MSG( pVal, false, _T("NULL output pointer") );
-#ifndef __WXWINCE__
- errno = 0;
-#endif
+ DO_IF_NOT_WINCE( errno = 0; )
const wxChar *start = c_str();
wxChar *end;
- *val = wxStrtod(start, &end);
+ double val = wxStrtod(start, &end);
// return true only if scan was stopped by the terminating NUL and if the
// string was not empty to start with and no under/overflow occurred
- return !*end && (end != start)
-#ifndef __WXWINCE__
- && (errno != ERANGE)
-#endif
- ;
+ if ( *end || end == start DO_IF_NOT_WINCE(|| errno == ERANGE) )
+ return false;
+
+ *pVal = val;
+
+ return true;
}
// ---------------------------------------------------------------------------
// formatted output
// ---------------------------------------------------------------------------
+#if !wxUSE_UTF8_LOCALE_ONLY
/* static */
#ifdef wxNEEDS_WXSTRING_PRINTF_MIXIN
-wxString wxStringPrintfMixinBase::DoFormat(const wxChar *format, ...)
+wxString wxStringPrintfMixinBase::DoFormatWchar(const wxChar *format, ...)
#else
-wxString wxString::DoFormat(const wxChar *format, ...)
+wxString wxString::DoFormatWchar(const wxChar *format, ...)
#endif
{
va_list argptr;
return s;
}
+#endif // !wxUSE_UTF8_LOCALE_ONLY
+
+#if wxUSE_UNICODE_UTF8
+/* static */
+wxString wxString::DoFormatUtf8(const char *format, ...)
+{
+ va_list argptr;
+ va_start(argptr, format);
+
+ wxString s;
+ s.PrintfV(format, argptr);
+
+ va_end(argptr);
+
+ return s;
+}
+#endif // wxUSE_UNICODE_UTF8
/* static */
wxString wxString::FormatV(const wxString& format, va_list argptr)
return s;
}
+#if !wxUSE_UTF8_LOCALE_ONLY
#ifdef wxNEEDS_WXSTRING_PRINTF_MIXIN
-int wxStringPrintfMixinBase::DoPrintf(const wxChar *format, ...)
+int wxStringPrintfMixinBase::DoPrintfWchar(const wxChar *format, ...)
#else
-int wxString::DoPrintf(const wxChar *format, ...)
+int wxString::DoPrintfWchar(const wxChar *format, ...)
#endif
{
va_list argptr;
return iLen;
}
+#endif // !wxUSE_UTF8_LOCALE_ONLY
-int wxString::PrintfV(const wxString& format, va_list argptr)
+#if wxUSE_UNICODE_UTF8
+int wxString::DoPrintfUtf8(const char *format, ...)
+{
+ va_list argptr;
+ va_start(argptr, format);
+
+ int iLen = PrintfV(format, argptr);
+
+ va_end(argptr);
+
+ return iLen;
+}
+#endif // wxUSE_UNICODE_UTF8
+
+/*
+ Uses wxVsnprintf and places the result into the this string.
+
+ In ANSI build, wxVsnprintf is effectively vsnprintf but in Unicode build
+ it is vswprintf. Due to a discrepancy between vsnprintf and vswprintf in
+ the ISO C99 (and thus SUSv3) standard the return value for the case of
+ an undersized buffer is inconsistent. For conforming vsnprintf
+ implementations the function must return the number of characters that
+ would have been printed had the buffer been large enough. For conforming
+ vswprintf implementations the function must return a negative number
+ and set errno.
+
+ What vswprintf sets errno to is undefined but Darwin seems to set it to
+ EOVERFLOW. The only expected errno are EILSEQ and EINVAL. Both of
+ those are defined in the standard and backed up by several conformance
+ statements. Note that ENOMEM mentioned in the manual page does not
+ apply to swprintf, only wprintf and fwprintf.
+
+ Official manual page:
+ http://www.opengroup.org/onlinepubs/009695399/functions/swprintf.html
+
+ Some conformance statements (AIX, Solaris):
+ http://www.opengroup.org/csq/view.mhtml?RID=ibm%2FSD1%2F3
+ http://www.theopengroup.org/csq/view.mhtml?norationale=1&noreferences=1&RID=Fujitsu%2FSE2%2F10
+
+ Since EILSEQ and EINVAL are rather common but EOVERFLOW is not and since
+ EILSEQ and EINVAL are specifically defined to mean the error is other than
+ an undersized buffer and no other errno are defined we treat those two
+ as meaning hard errors and everything else gets the old behavior which
+ is to keep looping and increasing buffer size until the function succeeds.
+
+ In practice it's impossible to determine before compilation which behavior
+ may be used. The vswprintf function may have vsnprintf-like behavior or
+ vice-versa. Behavior detected on one release can theoretically change
+ with an updated release. Not to mention that configure testing for it
+ would require the test to be run on the host system, not the build system
+ which makes cross compilation difficult. Therefore, we make no assumptions
+ about behavior and try our best to handle every known case, including the
+ case where wxVsnprintf returns a negative number and fails to set errno.
+
+ There is yet one more non-standard implementation and that is our own.
+ Fortunately, that can be detected at compile-time.
+
+ On top of all that, ISO C99 explicitly defines snprintf to write a null
+ character to the last position of the specified buffer. That would be at
+ at the given buffer size minus 1. It is supposed to do this even if it
+ turns out that the buffer is sized too small.
+
+ Darwin (tested on 10.5) follows the C99 behavior exactly.
+
+ Glibc 2.6 almost follows the C99 behavior except vswprintf never sets
+ errno even when it fails. However, it only seems to ever fail due
+ to an undersized buffer.
+*/
+#if wxUSE_UNICODE_UTF8
+template<typename BufferType>
+#else
+// we only need one version in non-UTF8 builds and at least two Windows
+// compilers have problems with this function template, so use just one
+// normal function here
+#endif
+static int DoStringPrintfV(wxString& str,
+ const wxString& format, va_list argptr)
{
int size = 1024;
for ( ;; )
{
- wxStringBuffer tmp(*this, size + 1);
+#if wxUSE_UNICODE_UTF8
+ BufferType tmp(str, size + 1);
+ typename BufferType::CharType *buf = tmp;
+#else
+ wxStringBuffer tmp(str, size + 1);
wxChar *buf = tmp;
+#endif
if ( !buf )
{
// out of memory
+
+ // in UTF-8 build, leaving uninitialized junk in the buffer
+ // could result in invalid non-empty UTF-8 string, so just
+ // reset the string to empty on failure:
+ buf[0] = '\0';
return -1;
}
// only a copy
va_list argptrcopy;
wxVaCopy(argptrcopy, argptr);
+
+#ifndef __WXWINCE__
+ // Set errno to 0 to make it determinate if wxVsnprintf fails to set it.
+ errno = 0;
+#endif
int len = wxVsnprintf(buf, size, format, argptrcopy);
va_end(argptrcopy);
// some implementations of vsnprintf() don't NUL terminate
// the string if there is not enough space for it so
// always do it manually
+ // FIXME: This really seems to be the wrong and would be an off-by-one
+ // bug except the code above allocates an extra character.
buf[size] = _T('\0');
// vsnprintf() may return either -1 (traditional Unix behaviour) or the
// buffer were large enough (newer standards such as Unix98)
if ( len < 0 )
{
+ // NB: wxVsnprintf() may call either wxCRT_VsnprintfW or
+ // wxCRT_VsnprintfA in UTF-8 build; wxUSE_WXVSNPRINTF
+ // is true if *both* of them use our own implementation,
+ // otherwise we can't be sure
#if wxUSE_WXVSNPRINTF
// we know that our own implementation of wxVsnprintf() returns -1
// only for a format error - thus there's something wrong with
// the user's format string
+ buf[0] = '\0';
return -1;
-#else // assume that system version only returns error if not enough space
+#else // possibly using system version
+ // assume it only returns error if there is not enough space, but
+ // as we don't know how much we need, double the current size of
+ // the buffer
+#ifndef __WXWINCE__
+ if( (errno == EILSEQ) || (errno == EINVAL) )
+ // If errno was set to one of the two well-known hard errors
+ // then fail immediately to avoid an infinite loop.
+ return -1;
+ else
+#endif // __WXWINCE__
// still not enough, as we don't know how much we need, double the
// current size of the buffer
- size *= 2;
+ size *= 2;
#endif // wxUSE_WXVSNPRINTF/!wxUSE_WXVSNPRINTF
}
else if ( len >= size )
{
#if wxUSE_WXVSNPRINTF
- // we know that our own implementation of wxVsnprintf() returns
+ // we know that our own implementation of wxVsnprintf() returns
// size+1 when there's not enough space but that's not the size
// of the required buffer!
size *= 2; // so we just double the current size of the buffer
#else
// some vsnprintf() implementations NUL-terminate the buffer and
// some don't in len == size case, to be safe always add 1
+ // FIXME: I don't quite understand this comment. The vsnprintf
+ // function is specifically defined to return the number of
+ // characters printed not including the null terminator.
+ // So OF COURSE you need to add 1 to get the right buffer size.
+ // The following line is definitely correct, no question.
size = len + 1;
#endif
}
}
// we could have overshot
- Shrink();
+ str.Shrink();
- return length();
+ return str.length();
+}
+
+int wxString::PrintfV(const wxString& format, va_list argptr)
+{
+#if wxUSE_UNICODE_UTF8
+ #if wxUSE_STL_BASED_WXSTRING
+ typedef wxStringTypeBuffer<char> Utf8Buffer;
+ #else
+ typedef wxStringInternalBuffer Utf8Buffer;
+ #endif
+#endif
+
+#if wxUSE_UTF8_LOCALE_ONLY
+ return DoStringPrintfV<Utf8Buffer>(*this, format, argptr);
+#else
+ #if wxUSE_UNICODE_UTF8
+ if ( wxLocaleIsUtf8 )
+ return DoStringPrintfV<Utf8Buffer>(*this, format, argptr);
+ else
+ // wxChar* version
+ return DoStringPrintfV<wxStringBuffer>(*this, format, argptr);
+ #else
+ return DoStringPrintfV(*this, format, argptr);
+ #endif // UTF8/WCHAR
+#endif
}
// ----------------------------------------------------------------------------
return count;
}
-// convert to upper case, return the copy of the string
-wxString wxString::Upper() const
-{ wxString s(*this); return s.MakeUpper(); }
-
-// convert to lower case, return the copy of the string
-wxString wxString::Lower() const { wxString s(*this); return s.MakeLower(); }
-
projects / wxWidgets.git / blobdiff