X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/dd1eaa89dd33ca69086b8a4f3f350d36f8a922f0..ce7208d49d5ce2ca1dc0b3b83f14f1d04f29c4bf:/src/common/string.cpp diff --git a/src/common/string.cpp b/src/common/string.cpp index bb02779aee..b0bc3a1864 100644 --- a/src/common/string.cpp +++ b/src/common/string.cpp @@ -1,18 +1,15 @@ ///////////////////////////////////////////////////////////////////////////// -// Name: string.cpp +// Name: src/common/string.cpp // Purpose: wxString class -// Author: Vadim Zeitlin +// Author: Vadim Zeitlin, Ryan Norton // Modified by: // Created: 29/01/98 // RCS-ID: $Id$ // Copyright: (c) 1998 Vadim Zeitlin -// Licence: wxWindows license +// (c) 2004 Ryan Norton +// Licence: wxWindows licence ///////////////////////////////////////////////////////////////////////////// -#ifdef __GNUG__ -#pragma implementation "string.h" -#endif - /* * About ref counting: * 1) all empty strings use g_strEmpty, nRefs = -1 (set in Init()) @@ -28,547 +25,1400 @@ #include "wx/wxprec.h" #ifdef __BORLANDC__ -#pragma hdrstop + #pragma hdrstop #endif #ifndef WX_PRECOMP -#include "wx/defs.h" -#include "wx/string.h" + #include "wx/string.h" + #include "wx/intl.h" + #include "wx/thread.h" #endif #include +#include #include #include -#ifdef WXSTRING_IS_WXOBJECT - IMPLEMENT_DYNAMIC_CLASS(wxString, wxObject) -#endif //WXSTRING_IS_WXOBJECT +#ifdef __SALFORDC__ + #include +#endif + +// allocating extra space for each string consumes more memory but speeds up +// the concatenation operations (nLen is the current string's length) +// NB: EXTRA_ALLOC must be >= 0! +#define EXTRA_ALLOC (19 - nLen % 16) // --------------------------------------------------------------------------- // static class variables definition // --------------------------------------------------------------------------- -#ifdef STD_STRING_COMPATIBILITY - const size_t wxString::npos = STRING_MAXLEN; +#if !wxUSE_STL + //According to STL _must_ be a -1 size_t + const size_t wxStringBase::npos = (size_t) -1; #endif -// =========================================================================== -// static class data, special inlines -// =========================================================================== - -// for an empty string, GetStringData() will return this address -static int g_strEmpty[] = { -1, // ref count (locked) - 0, // current length - 0, // allocated memory - 0 }; // string data -// empty C style string: points to 'string data' byte of g_strEmpty -extern const char *g_szNul = (const char *)(&g_strEmpty[3]); +// ---------------------------------------------------------------------------- +// static data +// ---------------------------------------------------------------------------- -// =========================================================================== -// global functions -// =========================================================================== +#if wxUSE_STL -#ifdef STD_STRING_COMPATIBILITY +extern const wxChar WXDLLIMPEXP_BASE *wxEmptyString = _T(""); -// MS Visual C++ version 5.0 provides the new STL headers as well as the old -// iostream ones. -// -// ATTN: you can _not_ use both of these in the same program! -#if 0 // def _MSC_VER - #include - #define NAMESPACE std:: #else - #include - #define NAMESPACE -#endif //Visual C++ - -NAMESPACE istream& operator>>(NAMESPACE istream& is, wxString& WXUNUSED(str)) -{ -#if 0 - int w = is.width(0); - if ( is.ipfx(0) ) { - NAMESPACE streambuf *sb = is.rdbuf(); - str.erase(); - while ( true ) { - int ch = sb->sbumpc (); - if ( ch == EOF ) { - is.setstate(NAMESPACE ios::eofbit); - break; - } - else if ( isspace(ch) ) { - sb->sungetc(); - break; - } - str += ch; - if ( --w == 1 ) - break; - } - } +// for an empty string, GetStringData() will return this address: this +// structure has the same layout as wxStringData and it's data() method will +// return the empty string (dummy pointer) +static const struct +{ + wxStringData data; + wxChar dummy; +} g_strEmpty = { {-1, 0, 0}, wxT('\0') }; + +// empty C style string: points to 'string data' byte of g_strEmpty +extern const wxChar WXDLLIMPEXP_BASE *wxEmptyString = &g_strEmpty.dummy; - is.isfx(); - if ( str.length() == 0 ) - is.setstate(NAMESPACE ios::failbit); #endif - return is; -} -#endif //std::string compatibility +// ---------------------------------------------------------------------------- +// global functions +// ---------------------------------------------------------------------------- -// =========================================================================== -// wxString class core -// =========================================================================== +#if wxUSE_STD_IOSTREAM -// --------------------------------------------------------------------------- -// construction -// --------------------------------------------------------------------------- +#include -// construct an empty string -wxString::wxString() +wxSTD ostream& operator<<(wxSTD ostream& os, const wxString& str) { - Init(); +#ifdef __BORLANDC__ + os << str.mb_str(); +#else + os << str.c_str(); +#endif + return os; } -// copy constructor -wxString::wxString(const wxString& stringSrc) -{ - wxASSERT( stringSrc.GetStringData()->IsValid() ); +#endif // wxUSE_STD_IOSTREAM - if ( stringSrc.IsEmpty() ) { - // nothing to do for an empty string - Init(); - } - else { - m_pchData = stringSrc.m_pchData; // share same data - GetStringData()->Lock(); // => one more copy - } -} +// ---------------------------------------------------------------------------- +// private classes +// ---------------------------------------------------------------------------- -// constructs string of copies of character -wxString::wxString(char ch, size_t nLength) -{ - Init(); +// this small class is used to gather statistics for performance tuning +//#define WXSTRING_STATISTICS +#ifdef WXSTRING_STATISTICS + class Averager + { + public: + Averager(const wxChar *sz) { m_sz = sz; m_nTotal = m_nCount = 0; } + ~Averager() + { wxPrintf("wxString: average %s = %f\n", m_sz, ((float)m_nTotal)/m_nCount); } + + void Add(size_t n) { m_nTotal += n; m_nCount++; } + + private: + size_t m_nCount, m_nTotal; + const wxChar *m_sz; + } g_averageLength("allocation size"), + g_averageSummandLength("summand length"), + g_averageConcatHit("hit probability in concat"), + g_averageInitialLength("initial string length"); + + #define STATISTICS_ADD(av, val) g_average##av.Add(val) +#else + #define STATISTICS_ADD(av, val) +#endif // WXSTRING_STATISTICS - if ( nLength > 0 ) { - AllocBuffer(nLength); +#if !wxUSE_STL - wxASSERT( sizeof(char) == 1 ); // can't use memset if not +// =========================================================================== +// wxStringData class deallocation +// =========================================================================== - memset(m_pchData, ch, nLength); - } +#if defined(__VISUALC__) && defined(_MT) && !defined(_DLL) +# pragma message (__FILE__ ": building with Multithreaded non DLL runtime has a performance impact on wxString!") +void wxStringData::Free() +{ + free(this); } +#endif + +// =========================================================================== +// wxStringBase +// =========================================================================== // takes nLength elements of psz starting at nPos -void wxString::InitWith(const char *psz, size_t nPos, size_t nLength) +void wxStringBase::InitWith(const wxChar *psz, size_t nPos, size_t nLength) { Init(); - wxASSERT( nPos <= Strlen(psz) ); + // if the length is not given, assume the string to be NUL terminated + if ( nLength == npos ) { + wxASSERT_MSG( nPos <= wxStrlen(psz), _T("index out of bounds") ); + + nLength = wxStrlen(psz + nPos); + } - if ( nLength == STRING_MAXLEN ) - nLength = Strlen(psz + nPos); + STATISTICS_ADD(InitialLength, nLength); if ( nLength > 0 ) { // trailing '\0' is written in AllocBuffer() - AllocBuffer(nLength); - memcpy(m_pchData, psz + nPos, nLength*sizeof(char)); + if ( !AllocBuffer(nLength) ) { + wxFAIL_MSG( _T("out of memory in wxStringBase::InitWith") ); + return; + } + wxTmemcpy(m_pchData, psz + nPos, nLength); } } -// take first nLength characters of C string psz -// (default value of STRING_MAXLEN means take all the string) -wxString::wxString(const char *psz, size_t nLength) -{ - InitWith(psz, 0, nLength); -} - -// the same as previous constructor, but for compilers using unsigned char -wxString::wxString(const unsigned char* psz, size_t nLength) -{ - InitWith((const char *)psz, 0, nLength); -} - -#ifdef STD_STRING_COMPATIBILITY - -// ctor from a substring -wxString::wxString(const wxString& str, size_t nPos, size_t nLen) -{ - wxASSERT( str.GetStringData()->IsValid() ); - - InitWith(str.c_str(), nPos, nLen == npos ? 0 : nLen); -} - // poor man's iterators are "void *" pointers -wxString::wxString(const void *pStart, const void *pEnd) -{ - InitWith((const char *)pStart, 0, - (const char *)pEnd - (const char *)pStart); -} - -#endif //std::string compatibility - -// from wide string -wxString::wxString(const wchar_t *pwz) +wxStringBase::wxStringBase(const void *pStart, const void *pEnd) { - // first get necessary size - size_t nLen = wcstombs(NULL, pwz, 0); - - // empty? - if ( nLen != 0 ) { - AllocBuffer(nLen); - wcstombs(m_pchData, pwz, nLen); + if ( pEnd >= pStart ) + { + InitWith((const wxChar *)pStart, 0, + (const wxChar *)pEnd - (const wxChar *)pStart); } - else { + else + { + wxFAIL_MSG( _T("pStart is not before pEnd") ); Init(); } } +wxStringBase::wxStringBase(size_type n, wxChar ch) +{ + Init(); + append(n, ch); +} + // --------------------------------------------------------------------------- // memory allocation // --------------------------------------------------------------------------- // allocates memory needed to store a C string of length nLen -void wxString::AllocBuffer(size_t nLen) +bool wxStringBase::AllocBuffer(size_t nLen) { - wxASSERT( nLen > 0 ); // - wxASSERT( nLen <= INT_MAX-1 ); // max size (enough room for 1 extra) + // allocating 0 sized buffer doesn't make sense, all empty strings should + // reuse g_strEmpty + wxASSERT( nLen > 0 ); + + // make sure that we don't overflow + wxASSERT( nLen < (INT_MAX / sizeof(wxChar)) - + (sizeof(wxStringData) + EXTRA_ALLOC + 1) ); + + STATISTICS_ADD(Length, nLen); // allocate memory: // 1) one extra character for '\0' termination // 2) sizeof(wxStringData) for housekeeping info - wxStringData* pData = (wxStringData*)malloc(sizeof(wxStringData) + - (nLen + 1)*sizeof(char)); + wxStringData* pData = (wxStringData*) + malloc(sizeof(wxStringData) + (nLen + EXTRA_ALLOC + 1)*sizeof(wxChar)); + + if ( pData == NULL ) { + // allocation failures are handled by the caller + return false; + } + pData->nRefs = 1; - pData->data()[nLen] = '\0'; pData->nDataLength = nLen; - pData->nAllocLength = nLen; + pData->nAllocLength = nLen + EXTRA_ALLOC; m_pchData = pData->data(); // data starts after wxStringData + m_pchData[nLen] = wxT('\0'); + return true; } // must be called before changing this string -void wxString::CopyBeforeWrite() +bool wxStringBase::CopyBeforeWrite() { wxStringData* pData = GetStringData(); if ( pData->IsShared() ) { pData->Unlock(); // memory not freed because shared - AllocBuffer(pData->nDataLength); - memcpy(m_pchData, pData->data(), (pData->nDataLength + 1)*sizeof(char)); + size_t nLen = pData->nDataLength; + if ( !AllocBuffer(nLen) ) { + // allocation failures are handled by the caller + return false; + } + wxTmemcpy(m_pchData, pData->data(), nLen); } - wxASSERT( !pData->IsShared() ); // we must be the only owner + wxASSERT( !GetStringData()->IsShared() ); // we must be the only owner + + return true; } // must be called before replacing contents of this string -void wxString::AllocBeforeWrite(size_t nLen) +bool wxStringBase::AllocBeforeWrite(size_t nLen) { wxASSERT( nLen != 0 ); // doesn't make any sense // must not share string and must have enough space - register wxStringData* pData = GetStringData(); - if ( pData->IsShared() || (nLen > pData->nAllocLength) ) { + wxStringData* pData = GetStringData(); + if ( pData->IsShared() || pData->IsEmpty() ) { // can't work with old buffer, get new one pData->Unlock(); - AllocBuffer(nLen); + if ( !AllocBuffer(nLen) ) { + // allocation failures are handled by the caller + return false; + } + } + else { + if ( nLen > pData->nAllocLength ) { + // realloc the buffer instead of calling malloc() again, this is more + // efficient + STATISTICS_ADD(Length, nLen); + + nLen += EXTRA_ALLOC; + + pData = (wxStringData*) + realloc(pData, sizeof(wxStringData) + (nLen + 1)*sizeof(wxChar)); + + if ( pData == NULL ) { + // allocation failures are handled by the caller + // keep previous data since reallocation failed + return false; + } + + pData->nAllocLength = nLen; + m_pchData = pData->data(); + } } wxASSERT( !GetStringData()->IsShared() ); // we must be the only owner + + // it doesn't really matter what the string length is as it's going to be + // overwritten later but, for extra safety, set it to 0 for now as we may + // have some junk in m_pchData + GetStringData()->nDataLength = 0; + + return true; +} + +wxStringBase& wxStringBase::append(size_t n, wxChar ch) +{ + size_type len = length(); + + if ( !Alloc(len + n) || !CopyBeforeWrite() ) { + wxFAIL_MSG( _T("out of memory in wxStringBase::append") ); + } + GetStringData()->nDataLength = len + n; + m_pchData[len + n] = '\0'; + for ( size_t i = 0; i < n; ++i ) + m_pchData[len + i] = ch; + return *this; +} + +void wxStringBase::resize(size_t nSize, wxChar ch) +{ + size_t len = length(); + + if ( nSize < len ) + { + erase(begin() + nSize, end()); + } + else if ( nSize > len ) + { + append(nSize - len, ch); + } + //else: we have exactly the specified length, nothing to do } // allocate enough memory for nLen characters -void wxString::Alloc(uint nLen) +bool wxStringBase::Alloc(size_t nLen) { wxStringData *pData = GetStringData(); if ( pData->nAllocLength <= nLen ) { - if ( pData->IsEmpty() ) - AllocBuffer(nLen); + if ( pData->IsEmpty() ) { + nLen += EXTRA_ALLOC; + + pData = (wxStringData *) + malloc(sizeof(wxStringData) + (nLen + 1)*sizeof(wxChar)); + + if ( pData == NULL ) { + // allocation failure handled by caller + return false; + } + + pData->nRefs = 1; + pData->nDataLength = 0; + pData->nAllocLength = nLen; + m_pchData = pData->data(); // data starts after wxStringData + m_pchData[0u] = wxT('\0'); + } + else if ( pData->IsShared() ) { + pData->Unlock(); // memory not freed because shared + size_t nOldLen = pData->nDataLength; + if ( !AllocBuffer(nLen) ) { + // allocation failure handled by caller + return false; + } + // +1 to copy the terminator, too + memcpy(m_pchData, pData->data(), (nOldLen+1)*sizeof(wxChar)); + GetStringData()->nDataLength = nOldLen; + } else { - wxStringData *p = (wxStringData *) - realloc(pData, sizeof(wxStringData) + (nLen + 1)*sizeof(char)); - if ( p != NULL && p != pData ) { - // the call succeeded but the pointer changed - pData->Unlock(); - free(pData); - - p->nRefs = 1; - p->nAllocLength = nLen; - m_pchData = p->data(); + nLen += EXTRA_ALLOC; + + pData = (wxStringData *) + realloc(pData, sizeof(wxStringData) + (nLen + 1)*sizeof(wxChar)); + + if ( pData == NULL ) { + // allocation failure handled by caller + // keep previous data since reallocation failed + return false; } - //else: do nothing: either the call failed or the pointer is unchanged + + // it's not important if the pointer changed or not (the check for this + // is not faster than assigning to m_pchData in all cases) + pData->nAllocLength = nLen; + m_pchData = pData->data(); } } //else: we've already got enough + return true; } -// shrink to minimal size (releasing extra memory) -void wxString::Shrink() +wxStringBase::iterator wxStringBase::begin() { - wxStringData *pData = GetStringData(); - void *p = realloc(pData, sizeof(wxStringData) + - (pData->nDataLength + 1)*sizeof(char)); - if ( p == NULL ) // huh? can't unallocate memory? unlikely but possible. - return; - wxASSERT( p == pData ); // we're decrementing the size - block shouldn't move! + if (length() > 0) + CopyBeforeWrite(); + return m_pchData; } -// get the pointer to writable buffer of (at least) nLen bytes -char *wxString::GetWriteBuf(uint nLen) +wxStringBase::iterator wxStringBase::end() { - AllocBeforeWrite(nLen); - - wxASSERT( GetStringData()->nRefs == 1 ); - GetStringData()->Validate(FALSE); - - return m_pchData; + if (length() > 0) + CopyBeforeWrite(); + return m_pchData + length(); } -// put string back in a reasonable state after GetWriteBuf -void wxString::UngetWriteBuf() +wxStringBase::iterator wxStringBase::erase(iterator it) { - GetStringData()->nDataLength = strlen(m_pchData); - GetStringData()->Validate(TRUE); + size_type idx = it - begin(); + erase(idx, 1); + return begin() + idx; } -// dtor frees memory if no other strings use it -wxString::~wxString() +wxStringBase& wxStringBase::erase(size_t nStart, size_t nLen) { - GetStringData()->Unlock(); + wxASSERT(nStart <= length()); + size_t strLen = length() - nStart; + // delete nLen or up to the end of the string characters + nLen = strLen < nLen ? strLen : nLen; + wxString strTmp(c_str(), nStart); + strTmp.append(c_str() + nStart + nLen, length() - nStart - nLen); + + swap(strTmp); + return *this; } -// --------------------------------------------------------------------------- -// data access -// --------------------------------------------------------------------------- +wxStringBase& wxStringBase::insert(size_t nPos, const wxChar *sz, size_t n) +{ + wxASSERT( nPos <= length() ); -// all functions are inline in string.h + if ( n == npos ) n = wxStrlen(sz); + if ( n == 0 ) return *this; -// --------------------------------------------------------------------------- -// assignment operators -// --------------------------------------------------------------------------- + if ( !Alloc(length() + n) || !CopyBeforeWrite() ) { + wxFAIL_MSG( _T("out of memory in wxStringBase::insert") ); + } -// helper function: does real copy -void wxString::AssignCopy(size_t nSrcLen, const char *pszSrcData) + memmove(m_pchData + nPos + n, m_pchData + nPos, + (length() - nPos) * sizeof(wxChar)); + memcpy(m_pchData + nPos, sz, n * sizeof(wxChar)); + GetStringData()->nDataLength = length() + n; + m_pchData[length()] = '\0'; + + return *this; +} + +void wxStringBase::swap(wxStringBase& str) { - if ( nSrcLen == 0 ) { - Reinit(); - } - else { - AllocBeforeWrite(nSrcLen); - memcpy(m_pchData, pszSrcData, nSrcLen*sizeof(char)); - GetStringData()->nDataLength = nSrcLen; - m_pchData[nSrcLen] = '\0'; - } + wxChar* tmp = str.m_pchData; + str.m_pchData = m_pchData; + m_pchData = tmp; } -// assigns one string to another -wxString& wxString::operator=(const wxString& stringSrc) +size_t wxStringBase::find(const wxStringBase& str, size_t nStart) const { - wxASSERT( stringSrc.GetStringData()->IsValid() ); + // deal with the special case of empty string first + const size_t nLen = length(); + const size_t nLenOther = str.length(); - // don't copy string over itself - if ( m_pchData != stringSrc.m_pchData ) { - if ( stringSrc.GetStringData()->IsEmpty() ) { - Reinit(); + if ( !nLenOther ) + { + // empty string is a substring of anything + return 0; } - else { - // adjust references - GetStringData()->Unlock(); - m_pchData = stringSrc.m_pchData; - GetStringData()->Lock(); + + if ( !nLen ) + { + // the other string is non empty so can't be our substring + return npos; } - } - return *this; -} + wxASSERT( str.GetStringData()->IsValid() ); + wxASSERT( nStart <= nLen ); -// assigns a single character -wxString& wxString::operator=(char ch) -{ - AssignCopy(1, &ch); - return *this; -} + const wxChar * const other = str.c_str(); -// assigns C string -wxString& wxString::operator=(const char *psz) -{ - AssignCopy(Strlen(psz), psz); - return *this; + // anchor + const wxChar* p = (const wxChar*)wxTmemchr(c_str() + nStart, + *other, + nLen - nStart); + + if ( !p ) + return npos; + + while ( p - c_str() + nLenOther <= nLen && wxTmemcmp(p, other, nLenOther) ) + { + p++; + + // anchor again + p = (const wxChar*)wxTmemchr(p, *other, nLen - (p - c_str())); + + if ( !p ) + return npos; + } + + return p - c_str() + nLenOther <= nLen ? p - c_str() : npos; } -// same as 'signed char' variant -wxString& wxString::operator=(const unsigned char* psz) +size_t wxStringBase::find(const wxChar* sz, size_t nStart, size_t n) const { - *this = (const char *)psz; - return *this; + return find(wxStringBase(sz, n), nStart); } -wxString& wxString::operator=(const wchar_t *pwz) +size_t wxStringBase::find(wxChar ch, size_t nStart) const { - wxString str(pwz); - *this = str; - return *this; -} + wxASSERT( nStart <= length() ); -// --------------------------------------------------------------------------- -// string concatenation -// --------------------------------------------------------------------------- + const wxChar *p = (const wxChar*)wxTmemchr(c_str() + nStart, ch, length() - nStart); -// concatenate two sources -// NB: assume that 'this' is a new wxString object -void wxString::ConcatCopy(int nSrc1Len, const char *pszSrc1Data, - int nSrc2Len, const char *pszSrc2Data) -{ - int nNewLen = nSrc1Len + nSrc2Len; - if ( nNewLen != 0 ) - { - AllocBuffer(nNewLen); - memcpy(m_pchData, pszSrc1Data, nSrc1Len*sizeof(char)); - memcpy(m_pchData + nSrc1Len, pszSrc2Data, nSrc2Len*sizeof(char)); - } + return p == NULL ? npos : p - c_str(); } -// add something to this string -void wxString::ConcatSelf(int nSrcLen, const char *pszSrcData) +size_t wxStringBase::rfind(const wxStringBase& str, size_t nStart) const { - // concatenating an empty string is a NOP - if ( nSrcLen != 0 ) { - register wxStringData *pData = GetStringData(); + wxASSERT( str.GetStringData()->IsValid() ); + wxASSERT( nStart == npos || nStart <= length() ); - // alloc new buffer if current is too small - if ( pData->IsShared() || - pData->nDataLength + nSrcLen > pData->nAllocLength ) { - // we have to grow the buffer, use the ConcatCopy routine - // (which will allocate memory) - wxStringData* pOldData = GetStringData(); - ConcatCopy(pOldData->nDataLength, m_pchData, nSrcLen, pszSrcData); - pOldData->Unlock(); - } - else { - // fast concatenation when buffer big enough - memcpy(m_pchData + pData->nDataLength, pszSrcData, nSrcLen*sizeof(char)); - pData->nDataLength += nSrcLen; + if ( length() >= str.length() ) + { + // avoids a corner case later + if ( length() == 0 && str.length() == 0 ) + return 0; + + // "top" is the point where search starts from + size_t top = length() - str.length(); - // should be enough space - wxASSERT( pData->nDataLength <= pData->nAllocLength ); + if ( nStart == npos ) + nStart = length() - 1; + if ( nStart < top ) + top = nStart; - m_pchData[pData->nDataLength] = '\0'; // put terminating '\0' + const wxChar *cursor = c_str() + top; + do + { + if ( wxTmemcmp(cursor, str.c_str(), + str.length()) == 0 ) + { + return cursor - c_str(); + } + } while ( cursor-- > c_str() ); } - } -} -/* - * concatenation functions come in 5 flavours: - * string + string - * char + string and string + char - * C str + string and string + C str - */ + return npos; +} -wxString operator+(const wxString& string1, const wxString& string2) +size_t wxStringBase::rfind(const wxChar* sz, size_t nStart, size_t n) const { - wxASSERT( string1.GetStringData()->IsValid() ); - wxASSERT( string2.GetStringData()->IsValid() ); - - wxString s; - s.ConcatCopy(string1.GetStringData()->nDataLength, string1.m_pchData, - string2.GetStringData()->nDataLength, string2.m_pchData); - return s; + return rfind(wxStringBase(sz, n), nStart); } -wxString operator+(const wxString& string1, char ch) +size_t wxStringBase::rfind(wxChar ch, size_t nStart) const { - wxASSERT( string1.GetStringData()->IsValid() ); + if ( nStart == npos ) + { + nStart = length(); + } + else + { + wxASSERT( nStart <= length() ); + } + + const wxChar *actual; + for ( actual = c_str() + ( nStart == npos ? length() : nStart + 1 ); + actual > c_str(); --actual ) + { + if ( *(actual - 1) == ch ) + return (actual - 1) - c_str(); + } - wxString s; - s.ConcatCopy(string1.GetStringData()->nDataLength, string1.m_pchData, 1, &ch); - return s; + return npos; } -wxString operator+(char ch, const wxString& string) +size_t wxStringBase::find_first_of(const wxChar* sz, size_t nStart) const { - wxASSERT( string.GetStringData()->IsValid() ); + wxASSERT(nStart <= length()); + + size_t len = wxStrlen(sz); - wxString s; - s.ConcatCopy(1, &ch, string.GetStringData()->nDataLength, string.m_pchData); - return s; + size_t i; + for(i = nStart; i < this->length(); ++i) + { + if (wxTmemchr(sz, *(c_str() + i), len)) + break; + } + + if(i == this->length()) + return npos; + else + return i; } -wxString operator+(const wxString& string, const char *psz) +size_t wxStringBase::find_first_of(const wxChar* sz, size_t nStart, + size_t n) const { - wxASSERT( string.GetStringData()->IsValid() ); - - wxString s; - s.ConcatCopy(string.GetStringData()->nDataLength, string.m_pchData, - Strlen(psz), psz); - return s; + return find_first_of(wxStringBase(sz, n), nStart); } -wxString operator+(const char *psz, const wxString& string) +size_t wxStringBase::find_last_of(const wxChar* sz, size_t nStart) const { - wxASSERT( string.GetStringData()->IsValid() ); + if ( nStart == npos ) + { + nStart = length() - 1; + } + else + { + wxASSERT_MSG( nStart <= length(), + _T("invalid index in find_last_of()") ); + } - wxString s; - s.ConcatCopy(Strlen(psz), psz, - string.GetStringData()->nDataLength, string.m_pchData); - return s; -} + size_t len = wxStrlen(sz); -// =========================================================================== -// other common string functions -// =========================================================================== + for ( const wxChar *p = c_str() + nStart; p >= c_str(); --p ) + { + if ( wxTmemchr(sz, *p, len) ) + return p - c_str(); + } -// --------------------------------------------------------------------------- -// simple sub-string extraction -// --------------------------------------------------------------------------- + return npos; +} -// helper function: clone the data attached to this string -void wxString::AllocCopy(wxString& dest, int nCopyLen, int nCopyIndex) const +size_t wxStringBase::find_last_of(const wxChar* sz, size_t nStart, + size_t n) const { - if ( nCopyLen == 0 ) - { - dest.Init(); - } - else - { - dest.AllocBuffer(nCopyLen); - memcpy(dest.m_pchData, m_pchData + nCopyIndex, nCopyLen*sizeof(char)); - } + return find_last_of(wxStringBase(sz, n), nStart); } -// extract string of length nCount starting at nFirst -// default value of nCount is 0 and means "till the end" -wxString wxString::Mid(size_t nFirst, size_t nCount) const +size_t wxStringBase::find_first_not_of(const wxChar* sz, size_t nStart) const { - // out-of-bounds requests return sensible things - if ( nCount == 0 ) - nCount = GetStringData()->nDataLength - nFirst; + if ( nStart == npos ) + { + nStart = length(); + } + else + { + wxASSERT( nStart <= length() ); + } - if ( nFirst + nCount > (size_t)GetStringData()->nDataLength ) - nCount = GetStringData()->nDataLength - nFirst; - if ( nFirst > (size_t)GetStringData()->nDataLength ) - nCount = 0; + size_t len = wxStrlen(sz); - wxString dest; - AllocCopy(dest, nCount, nFirst); - return dest; + size_t i; + for(i = nStart; i < this->length(); ++i) + { + if (!wxTmemchr(sz, *(c_str() + i), len)) + break; + } + + if(i == this->length()) + return npos; + else + return i; } -// extract nCount last (rightmost) characters -wxString wxString::Right(size_t nCount) const +size_t wxStringBase::find_first_not_of(const wxChar* sz, size_t nStart, + size_t n) const { - if ( nCount > (size_t)GetStringData()->nDataLength ) - nCount = GetStringData()->nDataLength; - - wxString dest; - AllocCopy(dest, nCount, GetStringData()->nDataLength - nCount); - return dest; + return find_first_not_of(wxStringBase(sz, n), nStart); +} + +size_t wxStringBase::find_first_not_of(wxChar ch, size_t nStart) const +{ + wxASSERT( nStart <= length() ); + + for ( const wxChar *p = c_str() + nStart; *p; p++ ) + { + if ( *p != ch ) + return p - c_str(); + } + + return npos; +} + +size_t wxStringBase::find_last_not_of(const wxChar* sz, size_t nStart) const +{ + if ( nStart == npos ) + { + nStart = length() - 1; + } + else + { + wxASSERT( nStart <= length() ); + } + + size_t len = wxStrlen(sz); + + for ( const wxChar *p = c_str() + nStart; p >= c_str(); --p ) + { + if ( !wxTmemchr(sz, *p,len) ) + return p - c_str(); + } + + return npos; +} + +size_t wxStringBase::find_last_not_of(const wxChar* sz, size_t nStart, + size_t n) const +{ + return find_last_not_of(wxStringBase(sz, n), nStart); +} + +size_t wxStringBase::find_last_not_of(wxChar ch, size_t nStart) const +{ + if ( nStart == npos ) + { + nStart = length() - 1; + } + else + { + wxASSERT( nStart <= length() ); + } + + for ( const wxChar *p = c_str() + nStart; p >= c_str(); --p ) + { + if ( *p != ch ) + return p - c_str(); + } + + return npos; +} + +wxStringBase& wxStringBase::replace(size_t nStart, size_t nLen, + const wxChar *sz) +{ + wxASSERT_MSG( nStart <= length(), + _T("index out of bounds in wxStringBase::replace") ); + size_t strLen = length() - nStart; + nLen = strLen < nLen ? strLen : nLen; + + wxStringBase strTmp; + strTmp.reserve(length()); // micro optimisation to avoid multiple mem allocs + + //This is kind of inefficient, but its pretty good considering... + //we don't want to use character access operators here because on STL + //it will freeze the reference count of strTmp, which means a deep copy + //at the end when swap is called + // + //Also, we can't use append with the full character pointer and must + //do it manually because this string can contain null characters + for(size_t i1 = 0; i1 < nStart; ++i1) + strTmp.append(1, this->c_str()[i1]); + + //its safe to do the full version here because + //sz must be a normal c string + strTmp.append(sz); + + for(size_t i2 = nStart + nLen; i2 < length(); ++i2) + strTmp.append(1, this->c_str()[i2]); + + swap(strTmp); + return *this; +} + +wxStringBase& wxStringBase::replace(size_t nStart, size_t nLen, + size_t nCount, wxChar ch) +{ + return replace(nStart, nLen, wxStringBase(nCount, ch).c_str()); +} + +wxStringBase& wxStringBase::replace(size_t nStart, size_t nLen, + const wxStringBase& str, + size_t nStart2, size_t nLen2) +{ + return replace(nStart, nLen, str.substr(nStart2, nLen2)); +} + +wxStringBase& wxStringBase::replace(size_t nStart, size_t nLen, + const wxChar* sz, size_t nCount) +{ + return replace(nStart, nLen, wxStringBase(sz, nCount).c_str()); +} + +wxStringBase wxStringBase::substr(size_t nStart, size_t nLen) const +{ + if ( nLen == npos ) + nLen = length() - nStart; + return wxStringBase(*this, nStart, nLen); +} + +// assigns one string to another +wxStringBase& wxStringBase::operator=(const wxStringBase& stringSrc) +{ + wxASSERT( stringSrc.GetStringData()->IsValid() ); + + // don't copy string over itself + if ( m_pchData != stringSrc.m_pchData ) { + if ( stringSrc.GetStringData()->IsEmpty() ) { + Reinit(); + } + else { + // adjust references + GetStringData()->Unlock(); + m_pchData = stringSrc.m_pchData; + GetStringData()->Lock(); + } + } + + return *this; +} + +// assigns a single character +wxStringBase& wxStringBase::operator=(wxChar ch) +{ + if ( !AssignCopy(1, &ch) ) { + wxFAIL_MSG( _T("out of memory in wxStringBase::operator=(wxChar)") ); + } + return *this; +} + +// assigns C string +wxStringBase& wxStringBase::operator=(const wxChar *psz) +{ + if ( !AssignCopy(wxStrlen(psz), psz) ) { + wxFAIL_MSG( _T("out of memory in wxStringBase::operator=(const wxChar *)") ); + } + return *this; +} + +// helper function: does real copy +bool wxStringBase::AssignCopy(size_t nSrcLen, const wxChar *pszSrcData) +{ + if ( nSrcLen == 0 ) { + Reinit(); + } + else { + if ( !AllocBeforeWrite(nSrcLen) ) { + // allocation failure handled by caller + return false; + } + memcpy(m_pchData, pszSrcData, nSrcLen*sizeof(wxChar)); + GetStringData()->nDataLength = nSrcLen; + m_pchData[nSrcLen] = wxT('\0'); + } + return true; +} + +// --------------------------------------------------------------------------- +// string concatenation +// --------------------------------------------------------------------------- + +// add something to this string +bool wxStringBase::ConcatSelf(size_t nSrcLen, const wxChar *pszSrcData, + size_t nMaxLen) +{ + STATISTICS_ADD(SummandLength, nSrcLen); + + nSrcLen = nSrcLen < nMaxLen ? nSrcLen : nMaxLen; + + // concatenating an empty string is a NOP + if ( nSrcLen > 0 ) { + wxStringData *pData = GetStringData(); + size_t nLen = pData->nDataLength; + size_t nNewLen = nLen + nSrcLen; + + // alloc new buffer if current is too small + if ( pData->IsShared() ) { + STATISTICS_ADD(ConcatHit, 0); + + // we have to allocate another buffer + wxStringData* pOldData = GetStringData(); + if ( !AllocBuffer(nNewLen) ) { + // allocation failure handled by caller + return false; + } + memcpy(m_pchData, pOldData->data(), nLen*sizeof(wxChar)); + pOldData->Unlock(); + } + else if ( nNewLen > pData->nAllocLength ) { + STATISTICS_ADD(ConcatHit, 0); + + reserve(nNewLen); + // we have to grow the buffer + if ( capacity() < nNewLen ) { + // allocation failure handled by caller + return false; + } + } + else { + STATISTICS_ADD(ConcatHit, 1); + + // the buffer is already big enough + } + + // should be enough space + wxASSERT( nNewLen <= GetStringData()->nAllocLength ); + + // fast concatenation - all is done in our buffer + memcpy(m_pchData + nLen, pszSrcData, nSrcLen*sizeof(wxChar)); + + m_pchData[nNewLen] = wxT('\0'); // put terminating '\0' + GetStringData()->nDataLength = nNewLen; // and fix the length + } + //else: the string to append was empty + return true; +} + +// --------------------------------------------------------------------------- +// simple sub-string extraction +// --------------------------------------------------------------------------- + +// helper function: clone the data attached to this string +bool wxStringBase::AllocCopy(wxString& dest, int nCopyLen, int nCopyIndex) const +{ + if ( nCopyLen == 0 ) { + dest.Init(); + } + else { + if ( !dest.AllocBuffer(nCopyLen) ) { + // allocation failure handled by caller + return false; + } + memcpy(dest.m_pchData, m_pchData + nCopyIndex, nCopyLen*sizeof(wxChar)); + } + return true; +} + +#endif // !wxUSE_STL + +#if !wxUSE_STL || !defined(HAVE_STD_STRING_COMPARE) + +#if !wxUSE_STL + #define STRINGCLASS wxStringBase +#else + #define STRINGCLASS wxString +#endif + +static inline int wxDoCmp(const wxChar* s1, size_t l1, + const wxChar* s2, size_t l2) +{ + if( l1 == l2 ) + return wxTmemcmp(s1, s2, l1); + else if( l1 < l2 ) + { + int ret = wxTmemcmp(s1, s2, l1); + return ret == 0 ? -1 : ret; + } + else + { + int ret = wxTmemcmp(s1, s2, l2); + return ret == 0 ? +1 : ret; + } +} + +int STRINGCLASS::compare(const wxStringBase& str) const +{ + return ::wxDoCmp(data(), length(), str.data(), str.length()); +} + +int STRINGCLASS::compare(size_t nStart, size_t nLen, + const wxStringBase& str) const +{ + wxASSERT(nStart <= length()); + size_type strLen = length() - nStart; + nLen = strLen < nLen ? strLen : nLen; + return ::wxDoCmp(data() + nStart, nLen, str.data(), str.length()); +} + +int STRINGCLASS::compare(size_t nStart, size_t nLen, + const wxStringBase& str, + size_t nStart2, size_t nLen2) const +{ + wxASSERT(nStart <= length()); + wxASSERT(nStart2 <= str.length()); + size_type strLen = length() - nStart, + strLen2 = str.length() - nStart2; + nLen = strLen < nLen ? strLen : nLen; + nLen2 = strLen2 < nLen2 ? strLen2 : nLen2; + return ::wxDoCmp(data() + nStart, nLen, str.data() + nStart2, nLen2); +} + +int STRINGCLASS::compare(const wxChar* sz) const +{ + size_t nLen = wxStrlen(sz); + return ::wxDoCmp(data(), length(), sz, nLen); +} + +int STRINGCLASS::compare(size_t nStart, size_t nLen, + const wxChar* sz, size_t nCount) const +{ + wxASSERT(nStart <= length()); + size_type strLen = length() - nStart; + nLen = strLen < nLen ? strLen : nLen; + if( nCount == npos ) + nCount = wxStrlen(sz); + + return ::wxDoCmp(data() + nStart, nLen, sz, nCount); +} + +#undef STRINGCLASS + +#endif // !wxUSE_STL || !defined(HAVE_STD_STRING_COMPARE) + +// =========================================================================== +// wxString class core +// =========================================================================== + +// --------------------------------------------------------------------------- +// construction and conversion +// --------------------------------------------------------------------------- + +#if wxUSE_UNICODE + +// from multibyte string +wxString::wxString(const char *psz, const wxMBConv& conv, size_t nLength) +{ + // anything to do? + if ( psz && nLength != 0 ) + { + if ( nLength == npos ) + { + nLength = wxNO_LEN; + } + + size_t nLenWide; + wxWCharBuffer wbuf = conv.cMB2WC(psz, nLength, &nLenWide); + + if ( nLenWide ) + assign(wbuf, nLenWide); + } +} + +//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); +} + +#else // ANSI + +#if wxUSE_WCHAR_T + +// from wide string +wxString::wxString(const wchar_t *pwz, const wxMBConv& conv, size_t nLength) +{ + // anything to do? + if ( pwz && nLength != 0 ) + { + if ( nLength == npos ) + { + nLength = wxNO_LEN; + } + + size_t nLenMB; + wxCharBuffer buf = conv.cWC2MB(pwz, nLength, &nLenMB); + + if ( nLenMB ) + assign(buf, nLenMB); + } +} + +//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); +} + +#endif // wxUSE_WCHAR_T + +#endif // Unicode/ANSI + +// shrink to minimal size (releasing extra memory) +bool wxString::Shrink() +{ + wxString tmp(begin(), end()); + swap(tmp); + return tmp.length() == length(); +} + +#if !wxUSE_STL +// get the pointer to writable buffer of (at least) nLen bytes +wxChar *wxString::GetWriteBuf(size_t nLen) +{ + if ( !AllocBeforeWrite(nLen) ) { + // allocation failure handled by caller + return NULL; + } + + wxASSERT( GetStringData()->nRefs == 1 ); + GetStringData()->Validate(false); + + return m_pchData; +} + +// put string back in a reasonable state after GetWriteBuf +void wxString::UngetWriteBuf() +{ + GetStringData()->nDataLength = wxStrlen(m_pchData); + GetStringData()->Validate(true); +} + +void wxString::UngetWriteBuf(size_t nLen) +{ + GetStringData()->nDataLength = nLen; + GetStringData()->Validate(true); +} +#endif + +// --------------------------------------------------------------------------- +// data access +// --------------------------------------------------------------------------- + +// all functions are inline in string.h + +// --------------------------------------------------------------------------- +// assignment operators +// --------------------------------------------------------------------------- + +#if !wxUSE_UNICODE + +// same as 'signed char' variant +wxString& wxString::operator=(const unsigned char* psz) +{ + *this = (const char *)psz; + return *this; +} + +#if wxUSE_WCHAR_T +wxString& wxString::operator=(const wchar_t *pwz) +{ + wxString str(pwz); + swap(str); + return *this; +} +#endif + +#endif + +/* + * concatenation functions come in 5 flavours: + * string + string + * char + string and string + char + * C str + string and string + C str + */ + +wxString operator+(const wxString& str1, const wxString& str2) +{ +#if !wxUSE_STL + wxASSERT( str1.GetStringData()->IsValid() ); + wxASSERT( str2.GetStringData()->IsValid() ); +#endif + + wxString s = str1; + s += str2; + + return s; +} + +wxString operator+(const wxString& str, wxChar ch) +{ +#if !wxUSE_STL + wxASSERT( str.GetStringData()->IsValid() ); +#endif + + wxString s = str; + s += ch; + + return s; +} + +wxString operator+(wxChar ch, const wxString& str) +{ +#if !wxUSE_STL + wxASSERT( str.GetStringData()->IsValid() ); +#endif + + wxString s = ch; + s += str; + + return s; +} + +wxString operator+(const wxString& str, const wxChar *psz) +{ +#if !wxUSE_STL + wxASSERT( str.GetStringData()->IsValid() ); +#endif + + wxString s; + if ( !s.Alloc(wxStrlen(psz) + str.length()) ) { + wxFAIL_MSG( _T("out of memory in wxString::operator+") ); + } + s += str; + s += psz; + + return s; +} + +wxString operator+(const wxChar *psz, const wxString& str) +{ +#if !wxUSE_STL + wxASSERT( str.GetStringData()->IsValid() ); +#endif + + wxString s; + if ( !s.Alloc(wxStrlen(psz) + str.length()) ) { + wxFAIL_MSG( _T("out of memory in wxString::operator+") ); + } + s = psz; + s += str; + + return s; +} + +// =========================================================================== +// other common string functions +// =========================================================================== + +int wxString::Cmp(const wxString& s) const +{ + return compare(s); +} + +int wxString::Cmp(const wxChar* psz) const +{ + return compare(psz); +} + +static inline int wxDoCmpNoCase(const wxChar* s1, size_t l1, + const wxChar* s2, size_t l2) +{ + size_t i; + + if( l1 == l2 ) + { + for(i = 0; i < l1; ++i) + { + if(wxTolower(s1[i]) != wxTolower(s2[i])) + break; + } + return i == l1 ? 0 : wxTolower(s1[i]) < wxTolower(s2[i]) ? -1 : 1; + } + else if( l1 < l2 ) + { + for(i = 0; i < l1; ++i) + { + if(wxTolower(s1[i]) != wxTolower(s2[i])) + break; + } + return i == l1 ? -1 : wxTolower(s1[i]) < wxTolower(s2[i]) ? -1 : 1; + } + else + { + for(i = 0; i < l2; ++i) + { + if(wxTolower(s1[i]) != wxTolower(s2[i])) + break; + } + return i == l2 ? 1 : wxTolower(s1[i]) < wxTolower(s2[i]) ? -1 : 1; + } +} + +int wxString::CmpNoCase(const wxString& s) const +{ + return wxDoCmpNoCase(data(), length(), s.data(), s.length()); +} + +int wxString::CmpNoCase(const wxChar* psz) const +{ + int nLen = wxStrlen(psz); + + return wxDoCmpNoCase(data(), length(), psz, nLen); +} + + +#if wxUSE_UNICODE + +#ifdef __MWERKS__ +#ifndef __SCHAR_MAX__ +#define __SCHAR_MAX__ 127 +#endif +#endif + +wxString wxString::FromAscii(const char *ascii) +{ + if (!ascii) + return wxEmptyString; + + size_t len = strlen( ascii ); + wxString res; + + if ( len ) + { + wxStringBuffer buf(res, len); + + wchar_t *dest = buf; + + for ( ;; ) + { + if ( (*dest++ = (wchar_t)(unsigned char)*ascii++) == L'\0' ) + break; + } + } + + return res; +} + +wxString wxString::FromAscii(const char ascii) +{ + // What do we do with '\0' ? + + wxString res; + res += (wchar_t)(unsigned char) ascii; + + return res; +} + +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 ( ;; ) + { + *dest++ = (char)(*pwc > SCHAR_MAX ? wxT('_') : *pwc); + + // 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++ ) + break; + } + + return buffer; +} + +#endif // Unicode + +// extract string of length nCount starting at nFirst +wxString wxString::Mid(size_t nFirst, size_t nCount) const +{ + size_t nLen = length(); + + // default value of nCount is npos and means "till the end" + if ( nCount == npos ) + { + nCount = nLen - nFirst; + } + + // out-of-bounds requests return sensible things + if ( nFirst + nCount > nLen ) + { + nCount = nLen - nFirst; + } + + if ( nFirst > nLen ) + { + // AllocCopy() will return empty string + return wxEmptyString; + } + + wxString dest(*this, nFirst, nCount); + if ( dest.length() != nCount ) + { + wxFAIL_MSG( _T("out of memory in wxString::Mid") ); + } + + return dest; +} + +// 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 +{ + 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 ( rest ) + { + // put the rest of the string into provided pointer + *rest = p; + } + + 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 +{ + wxASSERT_MSG( suffix, _T("invalid parameter in wxString::EndssWith") ); + + int start = length() - wxStrlen(suffix); + if ( start < 0 || wxStrcmp(c_str() + start, suffix) != 0 ) + return false; + + if ( rest ) + { + // put the rest of the string into provided pointer + rest->assign(*this, 0, start); + } + + return true; +} + + +// extract nCount last (rightmost) characters +wxString wxString::Right(size_t nCount) const +{ + if ( nCount > length() ) + nCount = length(); + + wxString dest(*this, length() - nCount, nCount); + if ( dest.length() != nCount ) { + wxFAIL_MSG( _T("out of memory in wxString::Right") ); + } + return dest; } // get all characters after the last occurence of ch // (returns the whole string if ch not found) -wxString wxString::Right(char ch) const +wxString wxString::AfterLast(wxChar ch) const { wxString str; - int iPos = Find(ch, TRUE); - if ( iPos == NOT_FOUND ) + int iPos = Find(ch, true); + if ( iPos == wxNOT_FOUND ) str = *this; else str = c_str() + iPos + 1; @@ -579,32 +1429,32 @@ wxString wxString::Right(char ch) const // extract nCount first (leftmost) characters wxString wxString::Left(size_t nCount) const { - if ( nCount > (size_t)GetStringData()->nDataLength ) - nCount = GetStringData()->nDataLength; + if ( nCount > length() ) + nCount = length(); - wxString dest; - AllocCopy(dest, nCount, 0); + wxString dest(*this, 0, nCount); + if ( dest.length() != nCount ) { + wxFAIL_MSG( _T("out of memory in wxString::Left") ); + } return dest; } // get all characters before the first occurence of ch // (returns the whole string if ch not found) -wxString wxString::Left(char ch) const +wxString wxString::BeforeFirst(wxChar ch) const { - wxString str; - for ( const char *pc = m_pchData; *pc != '\0' && *pc != ch; pc++ ) - str += *pc; - - return str; + int iPos = Find(ch); + if ( iPos == wxNOT_FOUND ) iPos = length(); + return wxString(*this, 0, iPos); } /// get all characters before the last occurence of ch /// (returns empty string if ch not found) -wxString wxString::Before(char ch) const +wxString wxString::BeforeLast(wxChar ch) const { wxString str; - int iPos = Find(ch, TRUE); - if ( iPos != NOT_FOUND && iPos != 0 ) + int iPos = Find(ch, true); + if ( iPos != wxNOT_FOUND && iPos != 0 ) str = wxString(c_str(), iPos); return str; @@ -612,281 +1462,497 @@ wxString wxString::Before(char ch) const /// get all characters after the first occurence of ch /// (returns empty string if ch not found) -wxString wxString::After(char ch) const +wxString wxString::AfterFirst(wxChar ch) const { wxString str; int iPos = Find(ch); - if ( iPos != NOT_FOUND ) + if ( iPos != wxNOT_FOUND ) str = c_str() + iPos + 1; return str; } // replace first (or all) occurences of some substring with another one -uint wxString::Replace(const char *szOld, const char *szNew, bool bReplaceAll) +size_t wxString::Replace(const wxChar *szOld, + const wxChar *szNew, bool bReplaceAll) { - uint uiCount = 0; // count of replacements made + // if we tried to replace an empty string we'd enter an infinite loop below + wxCHECK_MSG( szOld && *szOld && szNew, 0, + _T("wxString::Replace(): invalid parameter") ); - uint uiOldLen = Strlen(szOld); + size_t uiCount = 0; // count of replacements made - wxString strTemp; - const char *pCurrent = m_pchData; - const char *pSubstr; - while ( *pCurrent != '\0' ) { - pSubstr = strstr(pCurrent, szOld); - if ( pSubstr == NULL ) { - // strTemp is unused if no replacements were made, so avoid the copy - if ( uiCount == 0 ) - return 0; + size_t uiOldLen = wxStrlen(szOld); + size_t uiNewLen = wxStrlen(szNew); - strTemp += pCurrent; // copy the rest - break; // exit the loop - } - else { - // take chars before match - strTemp.ConcatSelf(pSubstr - pCurrent, pCurrent); - strTemp += szNew; - pCurrent = pSubstr + uiOldLen; // restart after match + size_t dwPos = 0; - uiCount++; + while ( this->c_str()[dwPos] != wxT('\0') ) + { + //DO NOT USE STRSTR HERE + //this string can contain embedded null characters, + //so strstr will function incorrectly + dwPos = find(szOld, dwPos); + if ( dwPos == npos ) + break; // exit the loop + else + { + //replace this occurance of the old string with the new one + replace(dwPos, uiOldLen, szNew, uiNewLen); - // stop now? - if ( !bReplaceAll ) { - strTemp += pCurrent; // copy the rest - break; // exit the loop - } - } - } + //move up pos past the string that was replaced + dwPos += uiNewLen; + + //increase replace count + ++uiCount; - // only done if there were replacements, otherwise would have returned above - *this = strTemp; + // stop now? + if ( !bReplaceAll ) + break; // exit the loop + } + } - return uiCount; + return uiCount; } bool wxString::IsAscii() const { - const char *s = (const char*) *this; + const wxChar *s = (const wxChar*) *this; while(*s){ - if(!isascii(*s)) return(FALSE); + if(!isascii(*s)) return(false); s++; } - return(TRUE); + return(true); } bool wxString::IsWord() const { - const char *s = (const char*) *this; + const wxChar *s = (const wxChar*) *this; while(*s){ - if(!isalpha(*s)) return(FALSE); + if(!wxIsalpha(*s)) return(false); s++; } - return(TRUE); + return(true); } bool wxString::IsNumber() const { - const char *s = (const char*) *this; + const wxChar *s = (const wxChar*) *this; + if (wxStrlen(s)) + if ((s[0] == wxT('-')) || (s[0] == wxT('+'))) s++; while(*s){ - if(!isdigit(*s)) return(FALSE); + if(!wxIsdigit(*s)) return(false); s++; } - return(TRUE); + return(true); } wxString wxString::Strip(stripType w) const { wxString s = *this; - if ( w & leading ) s.Trim(FALSE); - if ( w & trailing ) s.Trim(TRUE); + if ( w & leading ) s.Trim(false); + if ( w & trailing ) s.Trim(true); return s; } // --------------------------------------------------------------------------- -// case conversion +// case conversion +// --------------------------------------------------------------------------- + +wxString& wxString::MakeUpper() +{ + for ( iterator it = begin(), en = end(); it != en; ++it ) + *it = (wxChar)wxToupper(*it); + + return *this; +} + +wxString& wxString::MakeLower() +{ + for ( iterator it = begin(), en = end(); 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 +// 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); } + +// trims spaces (in the sense of isspace) from left or right side +wxString& wxString::Trim(bool bFromRight) +{ + // first check if we're going to modify the string at all + if ( !empty() && + ( + (bFromRight && wxSafeIsspace(GetChar(length() - 1))) || + (!bFromRight && wxSafeIsspace(GetChar(0u))) + ) + ) + { + if ( bFromRight ) + { + // find last non-space character + reverse_iterator psz = rbegin(); + while ( (psz != rend()) && wxSafeIsspace(*psz) ) + psz++; + + // truncate at trailing space start + erase(psz.base(), end()); + } + else + { + // find first non-space character + iterator psz = begin(); + while ( (psz != end()) && wxSafeIsspace(*psz) ) + psz++; + + // fix up data and length + erase(begin(), psz); + } + } + + return *this; +} + +// adds nCount characters chPad to the string from either side +wxString& wxString::Pad(size_t nCount, wxChar chPad, bool bFromRight) +{ + wxString s(chPad, nCount); + + if ( bFromRight ) + *this += s; + else + { + s += *this; + swap(s); + } + + return *this; +} + +// truncate the string +wxString& wxString::Truncate(size_t uiLen) +{ + if ( uiLen < length() ) + { + erase(begin() + uiLen, end()); + } + //else: nothing to do, string is already short enough + + return *this; +} + +// --------------------------------------------------------------------------- +// finding (return wxNOT_FOUND if not found and index otherwise) // --------------------------------------------------------------------------- -wxString& wxString::MakeUpper() +// find a character +int wxString::Find(wxChar ch, bool bFromEnd) const { - CopyBeforeWrite(); - - for ( char *p = m_pchData; *p; p++ ) - *p = (char)toupper(*p); + size_type idx = bFromEnd ? find_last_of(ch) : find_first_of(ch); - return *this; + return (idx == npos) ? wxNOT_FOUND : (int)idx; } -wxString& wxString::MakeLower() +// find a sub-string (like strstr) +int wxString::Find(const wxChar *pszSub) const { - CopyBeforeWrite(); - - for ( char *p = m_pchData; *p; p++ ) - *p = (char)tolower(*p); + size_type idx = find(pszSub); - return *this; + return (idx == npos) ? wxNOT_FOUND : (int)idx; } -// --------------------------------------------------------------------------- -// trimming and padding -// --------------------------------------------------------------------------- +// ---------------------------------------------------------------------------- +// conversion to numbers +// ---------------------------------------------------------------------------- -// trims spaces (in the sense of isspace) from left or right side -wxString& wxString::Trim(bool bFromRight) +// the implementation of all the functions below is exactly the same so factor +// it out +#ifndef __WATCOMC__ + +template +bool wxStringToIntType(const wxChar *start, + T *val, + int base, + T (*func)(const wxChar *, wxChar **, int)) { - CopyBeforeWrite(); + wxCHECK_MSG( val, false, _T("NULL output pointer") ); + wxASSERT_MSG( !base || (base > 1 && base <= 36), _T("invalid base") ); - if ( bFromRight ) - { - // find last non-space character - char *psz = m_pchData + GetStringData()->nDataLength - 1; - while ( isspace(*psz) && (psz >= m_pchData) ) - psz--; - - // truncate at trailing space start - *++psz = '\0'; - GetStringData()->nDataLength = psz - m_pchData; - } - else - { - // find first non-space character - const char *psz = m_pchData; - while ( isspace(*psz) ) - psz++; - - // fix up data and length - int nDataLength = GetStringData()->nDataLength - (psz - m_pchData); - memmove(m_pchData, psz, (nDataLength + 1)*sizeof(char)); - GetStringData()->nDataLength = nDataLength; - } + errno = 0; - return *this; + 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) && (errno != ERANGE); } -// adds nCount characters chPad to the string from either side -wxString& wxString::Pad(size_t nCount, char chPad, bool bFromRight) -{ - wxString s(chPad, nCount); +#define wxSTR2INT(val, b, func) return wxStringToIntType(c_str(), val, b, func) - if ( bFromRight ) - *this += s; - else - { - s += *this; - *this = s; - } +#else // __WATCOMC__ - return *this; -} +// FIXME, TODO, ASAP !!! - ugly trick to make release for Open Watcom possible +// without changing code flow for other compilers -// truncate the string -wxString& wxString::Truncate(size_t uiLen) -{ - *(m_pchData + uiLen) = '\0'; - GetStringData()->nDataLength = uiLen; +#define wxSTR2INT(val, base, func) \ + wxCHECK_MSG( val, false, _T("NULL output pointer") ); \ + wxASSERT_MSG( !base || (base > 1 && base <= 36), _T("invalid base") ); \ + \ + errno = 0; \ + \ + wxChar *end; \ + *val = (*func)(c_str(), &end, base); \ + \ + return !*end && (end != c_str()) && (errno != ERANGE) - return *this; +#endif // !__WATCOMC__/__WATCOMC__ + +bool wxString::ToLong(long *val, int base) const +{ + wxSTR2INT(val, base, wxStrtol); } -// --------------------------------------------------------------------------- -// finding (return NOT_FOUND if not found and index otherwise) -// --------------------------------------------------------------------------- +bool wxString::ToULong(unsigned long *val, int base) const +{ + wxSTR2INT(val, base, wxStrtoul); +} -// find a character -int wxString::Find(char ch, bool bFromEnd) const +bool wxString::ToLongLong(wxLongLong_t *val, int base) const { - const char *psz = bFromEnd ? strrchr(m_pchData, ch) : strchr(m_pchData, ch); +#ifdef wxHAS_STRTOLL + wxSTR2INT(val, base, wxStrtoll); +#else + // TODO: implement this ourselves + wxUnusedVar(val); + wxUnusedVar(base); + return false; +#endif // wxHAS_STRTOLL +} - return (psz == NULL) ? NOT_FOUND : psz - m_pchData; +bool wxString::ToULongLong(wxULongLong_t *val, int base) const +{ +#ifdef wxHAS_STRTOLL + wxSTR2INT(val, base, wxStrtoull); +#else + // TODO: implement this ourselves + wxUnusedVar(val); + wxUnusedVar(base); + return false; +#endif } -// find a sub-string (like strstr) -int wxString::Find(const char *pszSub) const +bool wxString::ToDouble(double *val) const { - const char *psz = strstr(m_pchData, pszSub); + wxCHECK_MSG( val, false, _T("NULL pointer in wxString::ToDouble") ); + + errno = 0; + + const wxChar *start = c_str(); + wxChar *end; + *val = wxStrtod(start, &end); - return (psz == NULL) ? NOT_FOUND : psz - m_pchData; + // 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) && (errno != ERANGE); } // --------------------------------------------------------------------------- // formatted output // --------------------------------------------------------------------------- -int wxString::Printf(const char *pszFormat, ...) + +/* static */ +wxString wxString::Format(const wxChar *pszFormat, ...) { - va_list argptr; - va_start(argptr, pszFormat); + va_list argptr; + va_start(argptr, pszFormat); - int iLen = PrintfV(pszFormat, argptr); + wxString s; + s.PrintfV(pszFormat, argptr); - va_end(argptr); + va_end(argptr); - return iLen; + return s; } -int wxString::PrintfV(const char* pszFormat, va_list argptr) +/* static */ +wxString wxString::FormatV(const wxChar *pszFormat, va_list argptr) { - static char s_szScratch[1024]; - - int iLen = vsprintf(s_szScratch, pszFormat, argptr); - AllocBeforeWrite(iLen); - strcpy(m_pchData, s_szScratch); - - return iLen; + wxString s; + s.PrintfV(pszFormat, argptr); + return s; } -#if 0 -int wxString::Scanf(const char *pszFormat, ...) const +int wxString::Printf(const wxChar *pszFormat, ...) { - va_list argptr; - va_start(argptr, pszFormat); + va_list argptr; + va_start(argptr, pszFormat); - int iLen = ScanfV(pszFormat, argptr); + int iLen = PrintfV(pszFormat, argptr); - va_end(argptr); + va_end(argptr); - return iLen; + return iLen; } -int wxString::ScanfV(const char *pszFormat, va_list argptr) const +int wxString::PrintfV(const wxChar* pszFormat, va_list argptr) { -#ifdef __WXMSW__ - wxMessageBox("ScanfV not implemented"); - return 0; -#else - return vsscanf(c_str(), pszFormat, argptr); -#endif + int size = 1024; + + for ( ;; ) + { + wxStringBuffer tmp(*this, size + 1); + wxChar *buf = tmp; + + if ( !buf ) + { + // out of memory + return -1; + } + + // wxVsnprintf() may modify the original arg pointer, so pass it + // only a copy + va_list argptrcopy; + wxVaCopy(argptrcopy, argptr); + int len = wxVsnprintf(buf, size, pszFormat, 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 + buf[size] = _T('\0'); + + // vsnprintf() may return either -1 (traditional Unix behaviour) or the + // total number of characters which would have been written if the + // buffer were large enough (newer standards such as Unix98) + if ( len < 0 ) + { + // still not enough, as we don't know how much we need, double the + // current size of the buffer + size *= 2; + } + else if ( len >= size ) + { + // some vsnprintf() implementations NUL-terminate the buffer and + // some don't in len == size case, to be safe always add 1 + size = len + 1; + } + else // ok, there was enough space + { + break; + } + } + + // we could have overshot + Shrink(); + + return length(); } -#endif // ---------------------------------------------------------------------------- // misc other operations // ---------------------------------------------------------------------------- -bool wxString::Matches(const char *pszMask) const -{ - // check char by char - const char *pszTxt; - for ( pszTxt = c_str(); *pszMask != '\0'; pszMask++, pszTxt++ ) { - switch ( *pszMask ) { - case '?': - if ( *pszTxt == '\0' ) - return FALSE; - pszTxt++; +// returns true if the string matches the pattern which may contain '*' and +// '?' metacharacters (as usual, '?' matches any character and '*' any number +// of them) +bool wxString::Matches(const wxChar *pszMask) const +{ + // I disable this code as it doesn't seem to be faster (in fact, it seems + // to be much slower) than the old, hand-written code below and using it + // here requires always linking with libregex even if the user code doesn't + // use it +#if 0 // wxUSE_REGEX + // first translate the shell-like mask into a regex + wxString pattern; + pattern.reserve(wxStrlen(pszMask)); + + pattern += _T('^'); + while ( *pszMask ) + { + switch ( *pszMask ) + { + case _T('?'): + pattern += _T('.'); + break; + + case _T('*'): + pattern += _T(".*"); + break; + + case _T('^'): + case _T('.'): + case _T('$'): + case _T('('): + case _T(')'): + case _T('|'): + case _T('+'): + case _T('\\'): + // these characters are special in a RE, quote them + // (however note that we don't quote '[' and ']' to allow + // using them for Unix shell like matching) + pattern += _T('\\'); + // fall through + + default: + pattern += *pszMask; + } + pszMask++; + } + pattern += _T('$'); + + // and now use it + return wxRegEx(pattern, wxRE_NOSUB | wxRE_EXTENDED).Matches(c_str()); +#else // !wxUSE_REGEX + // TODO: this is, of course, awfully inefficient... + + // the char currently being checked + const wxChar *pszTxt = c_str(); + + // the last location where '*' matched + const wxChar *pszLastStarInText = NULL; + const wxChar *pszLastStarInMask = NULL; + +match: + for ( ; *pszMask != wxT('\0'); pszMask++, pszTxt++ ) { + switch ( *pszMask ) { + case wxT('?'): + if ( *pszTxt == wxT('\0') ) + return false; + + // pszTxt and pszMask will be incremented in the loop statement + break; - case '*': + case wxT('*'): { + // remember where we started to be able to backtrack later + pszLastStarInText = pszTxt; + pszLastStarInMask = pszMask; + // ignore special chars immediately following this one - while ( *pszMask == '*' || *pszMask == '?' ) + // (should this be an error?) + while ( *pszMask == wxT('*') || *pszMask == wxT('?') ) pszMask++; // if there is nothing more, match - if ( *pszMask == '\0' ) - return TRUE; + if ( *pszMask == wxT('\0') ) + return true; // are there any other metacharacters in the mask? - uint uiLenMask; - const char *pEndMask = strpbrk(pszMask, "*?"); + size_t uiLenMask; + const wxChar *pEndMask = wxStrpbrk(pszMask, wxT("*?")); if ( pEndMask != NULL ) { // we have to match the string between two metachars @@ -894,13 +1960,13 @@ bool wxString::Matches(const char *pszMask) const } else { // we have to match the remainder of the string - uiLenMask = strlen(pszMask); + uiLenMask = wxStrlen(pszMask); } wxString strToMatch(pszMask, uiLenMask); - const char* pMatch = strstr(pszTxt, strToMatch); + const wxChar* pMatch = wxStrstr(pszTxt, strToMatch); if ( pMatch == NULL ) - return FALSE; + return false; // -1 to compensate "++" in the loop pszTxt = pMatch + uiLenMask - 1; @@ -910,230 +1976,170 @@ bool wxString::Matches(const char *pszMask) const default: if ( *pszMask != *pszTxt ) - return FALSE; + return false; break; } } // match only if nothing left - return *pszTxt == '\0'; -} - -// --------------------------------------------------------------------------- -// standard C++ library string functions -// --------------------------------------------------------------------------- -#ifdef STD_STRING_COMPATIBILITY - -wxString& wxString::insert(size_t nPos, const wxString& str) -{ - wxASSERT( str.GetStringData()->IsValid() ); - wxASSERT( nPos <= Len() ); - - wxString strTmp; - char *pc = strTmp.GetWriteBuf(Len() + str.Len()); - strncpy(pc, c_str(), nPos); - strcpy(pc + nPos, str); - strcpy(pc + nPos + str.Len(), c_str() + nPos); - strTmp.UngetWriteBuf(); - *this = strTmp; + if ( *pszTxt == wxT('\0') ) + return true; - return *this; -} - -size_t wxString::find(const wxString& str, size_t nStart) const -{ - wxASSERT( str.GetStringData()->IsValid() ); - wxASSERT( nStart <= Len() ); - - const char *p = strstr(c_str() + nStart, str); - - return p == NULL ? npos : p - c_str(); -} + // if we failed to match, backtrack if we can + if ( pszLastStarInText ) { + pszTxt = pszLastStarInText + 1; + pszMask = pszLastStarInMask; -// VC++ 1.5 can't cope with the default argument in the header. -#if ! (defined(_MSC_VER) && !defined(__WIN32__)) -size_t wxString::find(const char* sz, size_t nStart, size_t n) const -{ - return find(wxString(sz, n == npos ? 0 : n), nStart); -} -#endif - -size_t wxString::find(char ch, size_t nStart) const -{ - wxASSERT( nStart <= Len() ); - - const char *p = strchr(c_str() + nStart, ch); + pszLastStarInText = NULL; - return p == NULL ? npos : p - c_str(); -} + // don't bother resetting pszLastStarInMask, it's unnecessary -size_t wxString::rfind(const wxString& str, size_t nStart) const -{ - wxASSERT( str.GetStringData()->IsValid() ); - wxASSERT( nStart <= Len() ); - - // # could be quicker than that - const char *p = c_str() + (nStart == npos ? Len() : nStart); - while ( p >= c_str() + str.Len() ) { - if ( strncmp(p - str.Len(), str, str.Len()) == 0 ) - return p - str.Len() - c_str(); - p--; + goto match; } - return npos; -} - -// VC++ 1.5 can't cope with the default argument in the header. -#if ! (defined(_MSC_VER) && !defined(__WIN32__)) -size_t wxString::rfind(const char* sz, size_t nStart, size_t n) const -{ - return rfind(wxString(sz, n == npos ? 0 : n), nStart); + return false; +#endif // wxUSE_REGEX/!wxUSE_REGEX } -size_t wxString::rfind(char ch, size_t nStart) const +// Count the number of chars +int wxString::Freq(wxChar ch) const { - wxASSERT( nStart <= Len() ); - - const char *p = strrchr(c_str() + nStart, ch); - - return p == NULL ? npos : p - c_str(); + int count = 0; + int len = length(); + for (int i = 0; i < len; i++) + { + if (GetChar(i) == ch) + count ++; + } + return count; } -#endif -wxString wxString::substr(size_t nStart, size_t nLen) const -{ - // npos means 'take all' - if ( nLen == npos ) - nLen = 0; - - wxASSERT( nStart + nLen <= Len() ); - - return wxString(c_str() + nStart, nLen == npos ? 0 : nLen); -} +// convert to upper case, return the copy of the string +wxString wxString::Upper() const +{ wxString s(*this); return s.MakeUpper(); } -wxString& wxString::erase(size_t nStart, size_t nLen) -{ - wxString strTmp(c_str(), nStart); - if ( nLen != npos ) { - wxASSERT( nStart + nLen <= Len() ); +// convert to lower case, return the copy of the string +wxString wxString::Lower() const { wxString s(*this); return s.MakeLower(); } - strTmp.append(c_str() + nStart + nLen); +int wxString::sprintf(const wxChar *pszFormat, ...) + { + va_list argptr; + va_start(argptr, pszFormat); + int iLen = PrintfV(pszFormat, argptr); + va_end(argptr); + return iLen; } - *this = strTmp; - return *this; -} - -wxString& wxString::replace(size_t nStart, size_t nLen, const char *sz) -{ - wxASSERT( nStart + nLen <= Strlen(sz) ); - - wxString strTmp; - if ( nStart != 0 ) - strTmp.append(c_str(), nStart); - strTmp += sz; - strTmp.append(c_str() + nStart + nLen); - - *this = strTmp; - return *this; -} +// ============================================================================ +// ArrayString +// ============================================================================ -wxString& wxString::replace(size_t nStart, size_t nLen, size_t nCount, char ch) -{ - return replace(nStart, nLen, wxString(ch, nCount)); -} +#include "wx/arrstr.h" -wxString& wxString::replace(size_t nStart, size_t nLen, - const wxString& str, size_t nStart2, size_t nLen2) +wxArrayString::wxArrayString(size_t sz, const wxChar** a) { - return replace(nStart, nLen, str.substr(nStart2, nLen2)); +#if !wxUSE_STL + Init(false); +#endif + for (size_t i=0; i < sz; i++) + Add(a[i]); } -wxString& wxString::replace(size_t nStart, size_t nLen, - const char* sz, size_t nCount) +wxArrayString::wxArrayString(size_t sz, const wxString* a) { - return replace(nStart, nLen, wxString(sz, nCount)); +#if !wxUSE_STL + Init(false); +#endif + for (size_t i=0; i < sz; i++) + Add(a[i]); } -#endif //std::string compatibility - -// ============================================================================ -// ArrayString -// ============================================================================ +#if !wxUSE_STL -// size increment = max(50% of current size, ARRAY_MAXSIZE_INCREMENT) +// size increment = min(50% of current size, ARRAY_MAXSIZE_INCREMENT) #define ARRAY_MAXSIZE_INCREMENT 4096 + #ifndef ARRAY_DEFAULT_INITIAL_SIZE // also defined in dynarray.h - #define ARRAY_DEFAULT_INITIAL_SIZE (16) +#define ARRAY_DEFAULT_INITIAL_SIZE (16) #endif #define STRING(p) ((wxString *)(&(p))) // ctor -wxArrayString::wxArrayString() +void wxArrayString::Init(bool autoSort) { m_nSize = m_nCount = 0; - m_pItems = NULL; + m_pItems = (wxChar **) NULL; + m_autoSort = autoSort; } // copy ctor wxArrayString::wxArrayString(const wxArrayString& src) { - m_nSize = src.m_nSize; - m_nCount = src.m_nCount; + Init(src.m_autoSort); - if ( m_nSize != 0 ) - m_pItems = new char *[m_nSize]; - else - m_pItems = NULL; - - if ( m_nCount != 0 ) - memcpy(m_pItems, src.m_pItems, m_nCount*sizeof(char *)); + *this = src; } -// copy operator +// assignment operator wxArrayString& wxArrayString::operator=(const wxArrayString& src) { - DELETEA(m_pItems); + if ( m_nSize > 0 ) + Clear(); - m_nSize = src.m_nSize; - m_nCount = src.m_nCount; - - if ( m_nSize != 0 ) - m_pItems = new char *[m_nCount]; - else - m_pItems = NULL; + Copy(src); - if ( m_nCount != 0 ) - memcpy(m_pItems, src.m_pItems, m_nCount*sizeof(char *)); + m_autoSort = src.m_autoSort; return *this; } +void wxArrayString::Copy(const wxArrayString& src) +{ + if ( src.m_nCount > ARRAY_DEFAULT_INITIAL_SIZE ) + Alloc(src.m_nCount); + + for ( size_t n = 0; n < src.m_nCount; n++ ) + Add(src[n]); +} + // grow the array -void wxArrayString::Grow() +void wxArrayString::Grow(size_t nIncrement) { // only do it if no more place - if( m_nCount == m_nSize ) { - if( m_nSize == 0 ) { + if ( (m_nSize - m_nCount) < nIncrement ) { + // if ARRAY_DEFAULT_INITIAL_SIZE were set to 0, the initially empty would + // be never resized! + #if ARRAY_DEFAULT_INITIAL_SIZE == 0 + #error "ARRAY_DEFAULT_INITIAL_SIZE must be > 0!" + #endif + + if ( m_nSize == 0 ) { // was empty, alloc some memory m_nSize = ARRAY_DEFAULT_INITIAL_SIZE; - m_pItems = new char *[m_nSize]; + if (m_nSize < nIncrement) + m_nSize = nIncrement; + m_pItems = new wxChar *[m_nSize]; } else { + // otherwise when it's called for the first time, nIncrement would be 0 + // and the array would never be expanded // add 50% but not too much - size_t nIncrement = m_nSize >> 1; - if ( nIncrement > ARRAY_MAXSIZE_INCREMENT ) - nIncrement = ARRAY_MAXSIZE_INCREMENT; + size_t ndefIncrement = m_nSize < ARRAY_DEFAULT_INITIAL_SIZE + ? ARRAY_DEFAULT_INITIAL_SIZE : m_nSize >> 1; + if ( ndefIncrement > ARRAY_MAXSIZE_INCREMENT ) + ndefIncrement = ARRAY_MAXSIZE_INCREMENT; + if ( nIncrement < ndefIncrement ) + nIncrement = ndefIncrement; m_nSize += nIncrement; - char **pNew = new char *[m_nSize]; + wxChar **pNew = new wxChar *[m_nSize]; // copy data to new location - memcpy(pNew, m_pItems, m_nCount*sizeof(char *)); + memcpy(pNew, m_pItems, m_nCount*sizeof(wxChar *)); // delete old memory (but do not release the strings!) - DELETEA(m_pItems); + wxDELETEA(m_pItems); m_pItems = pNew; } @@ -1163,8 +2169,7 @@ void wxArrayString::Clear() m_nSize = m_nCount = 0; - DELETEA(m_pItems); - m_pItems = NULL; + wxDELETEA(m_pItems); } // dtor @@ -1172,109 +2177,352 @@ wxArrayString::~wxArrayString() { Free(); - DELETEA(m_pItems); + wxDELETEA(m_pItems); +} + +void wxArrayString::reserve(size_t nSize) +{ + Alloc(nSize); } // pre-allocates memory (frees the previous data!) void wxArrayString::Alloc(size_t nSize) { - wxASSERT( nSize > 0 ); - // only if old buffer was not big enough if ( nSize > m_nSize ) { Free(); - DELETEA(m_pItems); - m_pItems = new char *[nSize]; + wxDELETEA(m_pItems); + m_pItems = new wxChar *[nSize]; m_nSize = nSize; } m_nCount = 0; } -// searches the array for an item (forward or backwards) +// minimizes the memory usage by freeing unused memory +void wxArrayString::Shrink() +{ + // only do it if we have some memory to free + if( m_nCount < m_nSize ) { + // allocates exactly as much memory as we need + wxChar **pNew = new wxChar *[m_nCount]; + + // copy data to new location + memcpy(pNew, m_pItems, m_nCount*sizeof(wxChar *)); + delete [] m_pItems; + m_pItems = pNew; + } +} -// Robert Roebling (changed to bool from bool) +#if WXWIN_COMPATIBILITY_2_4 -int wxArrayString::Index(const char *sz, bool bCase, bool bFromEnd) const +// return a wxString[] as required for some control ctors. +wxString* wxArrayString::GetStringArray() const { - if ( bFromEnd ) { - if ( m_nCount > 0 ) { - uint ui = m_nCount; - do { - if ( STRING(m_pItems[--ui])->IsSameAs(sz, bCase) ) - return ui; - } - while ( ui != 0 ); + wxString *array = 0; + + if( m_nCount > 0 ) + { + array = new wxString[m_nCount]; + for( size_t i = 0; i < m_nCount; i++ ) + array[i] = m_pItems[i]; + } + + return array; +} + +void wxArrayString::Remove(size_t nIndex, size_t nRemove) +{ + RemoveAt(nIndex, nRemove); +} + +#endif // WXWIN_COMPATIBILITY_2_4 + +// searches the array for an item (forward or backwards) +int wxArrayString::Index(const wxChar *sz, bool bCase, bool bFromEnd) const +{ + if ( m_autoSort ) { + // use binary search in the sorted array + wxASSERT_MSG( bCase && !bFromEnd, + wxT("search parameters ignored for auto sorted array") ); + + size_t i, + lo = 0, + hi = m_nCount; + int res; + while ( lo < hi ) { + i = (lo + hi)/2; + + res = wxStrcmp(sz, m_pItems[i]); + if ( res < 0 ) + hi = i; + else if ( res > 0 ) + lo = i + 1; + else + return i; } + + return wxNOT_FOUND; } else { - for( uint ui = 0; ui < m_nCount; ui++ ) { - if( STRING(m_pItems[ui])->IsSameAs(sz, bCase) ) - return ui; + // use linear search in unsorted array + if ( bFromEnd ) { + if ( m_nCount > 0 ) { + size_t ui = m_nCount; + do { + if ( STRING(m_pItems[--ui])->IsSameAs(sz, bCase) ) + return ui; + } + while ( ui != 0 ); + } + } + else { + for( size_t ui = 0; ui < m_nCount; ui++ ) { + if( STRING(m_pItems[ui])->IsSameAs(sz, bCase) ) + return ui; + } } } - return NOT_FOUND; + return wxNOT_FOUND; } // add item at the end -void wxArrayString::Add(const wxString& str) -{ - wxASSERT( str.GetStringData()->IsValid() ); +size_t wxArrayString::Add(const wxString& str, size_t nInsert) +{ + if ( m_autoSort ) { + // insert the string at the correct position to keep the array sorted + size_t i, + lo = 0, + hi = m_nCount; + int res; + while ( lo < hi ) { + i = (lo + hi)/2; + + res = str.Cmp(m_pItems[i]); + if ( res < 0 ) + hi = i; + else if ( res > 0 ) + lo = i + 1; + else { + lo = hi = i; + break; + } + } + + wxASSERT_MSG( lo == hi, wxT("binary search broken") ); + + Insert(str, lo, nInsert); + + return (size_t)lo; + } + else { + wxASSERT( str.GetStringData()->IsValid() ); - Grow(); + Grow(nInsert); - // the string data must not be deleted! - str.GetStringData()->Lock(); - m_pItems[m_nCount++] = (char *)str.c_str(); + for (size_t i = 0; i < nInsert; i++) + { + // the string data must not be deleted! + str.GetStringData()->Lock(); + + // just append + m_pItems[m_nCount + i] = (wxChar *)str.c_str(); // const_cast + } + size_t ret = m_nCount; + m_nCount += nInsert; + return ret; + } } // add item at the given position -void wxArrayString::Insert(const wxString& str, size_t nIndex) +void wxArrayString::Insert(const wxString& str, size_t nIndex, size_t nInsert) { wxASSERT( str.GetStringData()->IsValid() ); - wxCHECK_RET( nIndex <= m_nCount, "bad index in wxArrayString::Insert" ); + wxCHECK_RET( nIndex <= m_nCount, wxT("bad index in wxArrayString::Insert") ); + wxCHECK_RET( m_nCount <= m_nCount + nInsert, + wxT("array size overflow in wxArrayString::Insert") ); + + Grow(nInsert); + + memmove(&m_pItems[nIndex + nInsert], &m_pItems[nIndex], + (m_nCount - nIndex)*sizeof(wxChar *)); + + for (size_t i = 0; i < nInsert; i++) + { + str.GetStringData()->Lock(); + m_pItems[nIndex + i] = (wxChar *)str.c_str(); + } + m_nCount += nInsert; +} + +// range insert (STL 23.2.4.3) +void +wxArrayString::insert(iterator it, const_iterator first, const_iterator last) +{ + const int idx = it - begin(); + + // grow it once + Grow(last - first); + + // reset "it" since it can change inside Grow() + it = begin() + idx; + + while ( first != last ) + { + it = insert(it, *first); - Grow(); + // insert returns an iterator to the last element inserted but we need + // insert the next after this one, that is before the next one + ++it; - memmove(&m_pItems[nIndex + 1], &m_pItems[nIndex], - (m_nCount - nIndex)*sizeof(char *)); + ++first; + } +} - str.GetStringData()->Lock(); - m_pItems[nIndex] = (char *)str.c_str(); +// expand the array +void wxArrayString::SetCount(size_t count) +{ + Alloc(count); - m_nCount++; + wxString s; + while ( m_nCount < count ) + m_pItems[m_nCount++] = (wxChar *)s.c_str(); } // removes item from array (by index) -void wxArrayString::Remove(size_t nIndex) +void wxArrayString::RemoveAt(size_t nIndex, size_t nRemove) { - wxCHECK_RET( nIndex <= m_nCount, "bad index in wxArrayString::Remove" ); + wxCHECK_RET( nIndex < m_nCount, wxT("bad index in wxArrayString::Remove") ); + wxCHECK_RET( nIndex + nRemove <= m_nCount, + wxT("removing too many elements in wxArrayString::Remove") ); // release our lock - Item(nIndex).GetStringData()->Unlock(); + for (size_t i = 0; i < nRemove; i++) + Item(nIndex + i).GetStringData()->Unlock(); - memmove(&m_pItems[nIndex], &m_pItems[nIndex + 1], - (m_nCount - nIndex - 1)*sizeof(char *)); - m_nCount--; + memmove(&m_pItems[nIndex], &m_pItems[nIndex + nRemove], + (m_nCount - nIndex - nRemove)*sizeof(wxChar *)); + m_nCount -= nRemove; } // removes item from array (by value) -void wxArrayString::Remove(const char *sz) +void wxArrayString::Remove(const wxChar *sz) { int iIndex = Index(sz); - wxCHECK_RET( iIndex != NOT_FOUND, - "removing inexistent element in wxArrayString::Remove" ); + wxCHECK_RET( iIndex != wxNOT_FOUND, + wxT("removing inexistent element in wxArrayString::Remove") ); + + RemoveAt(iIndex); +} + +void wxArrayString::assign(const_iterator first, const_iterator last) +{ + reserve(last - first); + for(; first != last; ++first) + push_back(*first); +} + +// ---------------------------------------------------------------------------- +// sorting +// ---------------------------------------------------------------------------- + +// we can only sort one array at a time with the quick-sort based +// implementation +#if wxUSE_THREADS + // need a critical section to protect access to gs_compareFunction and + // gs_sortAscending variables + static wxCriticalSection gs_critsectStringSort; +#endif // wxUSE_THREADS + +// function to use for string comparaison +static wxArrayString::CompareFunction gs_compareFunction = NULL; + +// if we don't use the compare function, this flag tells us if we sort the +// array in ascending or descending order +static bool gs_sortAscending = true; + +// function which is called by quick sort +extern "C" int wxC_CALLING_CONV // LINKAGEMODE +wxStringCompareFunction(const void *first, const void *second) +{ + wxString *strFirst = (wxString *)first; + wxString *strSecond = (wxString *)second; + + if ( gs_compareFunction ) { + return gs_compareFunction(*strFirst, *strSecond); + } + else { + // maybe we should use wxStrcoll + int result = strFirst->Cmp(*strSecond); - Remove((size_t)iIndex); + return gs_sortAscending ? result : -result; + } } // sort array elements using passed comparaison function +void wxArrayString::Sort(CompareFunction compareFunction) +{ + wxCRIT_SECT_LOCKER(lockCmpFunc, gs_critsectStringSort); + + wxASSERT( !gs_compareFunction ); // must have been reset to NULL + gs_compareFunction = compareFunction; + + DoSort(); + + // reset it to NULL so that Sort(bool) will work the next time + gs_compareFunction = NULL; +} + +extern "C" +{ + typedef int (wxC_CALLING_CONV * wxStringCompareFn)(const void *first, + const void *second); +} + +void wxArrayString::Sort(CompareFunction2 compareFunction) +{ + qsort(m_pItems, m_nCount, sizeof(wxChar *), (wxStringCompareFn)compareFunction); +} + +void wxArrayString::Sort(bool reverseOrder) +{ + Sort(reverseOrder ? wxStringSortDescending : wxStringSortAscending); +} + +void wxArrayString::DoSort() +{ + wxCHECK_RET( !m_autoSort, wxT("can't use this method with sorted arrays") ); + + // just sort the pointers using qsort() - of course it only works because + // wxString() *is* a pointer to its data + qsort(m_pItems, m_nCount, sizeof(wxChar *), wxStringCompareFunction); +} + +bool wxArrayString::operator==(const wxArrayString& a) const +{ + if ( m_nCount != a.m_nCount ) + return false; + + for ( size_t n = 0; n < m_nCount; n++ ) + { + if ( Item(n) != a[n] ) + return false; + } + + return true; +} + +#endif // !wxUSE_STL + +int wxCMPFUNC_CONV wxStringSortAscending(wxString* s1, wxString* s2) +{ + return s1->Cmp(*s2); +} -void wxArrayString::Sort(bool bCase, bool bReverse) +int wxCMPFUNC_CONV wxStringSortDescending(wxString* s1, wxString* s2) { - //@@@@ TO DO - //qsort(m_pItems, m_nCount, sizeof(char *), fCmp); + return -s1->Cmp(*s2); }