X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/097c080b74811b9217e7e5ddf1e5d825c1fa713f..f5419957e5794f2d10f4e125f77b2c2e2cd222d6:/src/common/string.cpp?ds=sidebyside diff --git a/src/common/string.cpp b/src/common/string.cpp index 3e5e41f2d6..749a952b34 100644 --- a/src/common/string.cpp +++ b/src/common/string.cpp @@ -6,7 +6,7 @@ // Created: 29/01/98 // RCS-ID: $Id$ // Copyright: (c) 1998 Vadim Zeitlin -// Licence: wxWindows license +// Licence: wxWindows license ///////////////////////////////////////////////////////////////////////////// #ifdef __GNUG__ @@ -32,18 +32,34 @@ #endif #ifndef WX_PRECOMP -#include "wx/defs.h" -#include "wx/string.h" + #include "wx/defs.h" + #include "wx/string.h" + #include "wx/intl.h" #endif #include #include #include +// This probably isn't right, what should it be Vadim? +// Otherwise we end up with no wxVsprintf defined. +#ifdef __WXMOTIF__ +#define HAVE_VPRINTF +#endif + +#ifdef wxUSE_WCSRTOMBS + #include // for wcsrtombs(), see comments where it's used +#endif // GNU + #ifdef WXSTRING_IS_WXOBJECT IMPLEMENT_DYNAMIC_CLASS(wxString, wxObject) #endif //WXSTRING_IS_WXOBJECT +// 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 // --------------------------------------------------------------------------- @@ -52,23 +68,50 @@ const size_t wxString::npos = STRING_MAXLEN; #endif -// =========================================================================== -// static class data, special inlines -// =========================================================================== +// ---------------------------------------------------------------------------- +// static data +// ---------------------------------------------------------------------------- + +// 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; + char dummy; +} g_strEmpty = { {-1, 0, 0}, '\0' }; -// 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 string shares memory with g_strEmpty -static wxStringData *g_strNul = (wxStringData*)&g_strEmpty; // empty C style string: points to 'string data' byte of g_strEmpty -extern const char *g_szNul = (const char *)(&g_strEmpty[3]); +extern const char *g_szNul = &g_strEmpty.dummy; -// =========================================================================== +// ---------------------------------------------------------------------------- +// conditional compilation +// ---------------------------------------------------------------------------- + +// we want to find out if the current platform supports vsnprintf()-like +// function: for Unix this is done with configure, for Windows we test the +// compiler explicitly. +#ifdef __WXMSW__ + #ifdef _MSC_VER + #define wxVsprintf _vsnprintf + #endif +#else // !Windows + #ifdef HAVE_VSNPRINTF + #define wxVsprintf vsnprintf + #endif +#endif // Windows/!Windows + +#ifndef wxVsprintf + // in this case we'll use vsprintf() (which is ANSI and thus should be + // always available), but it's unsafe because it doesn't check for buffer + // size - so give a warning + #define wxVsprintf(buffer,len,format,argptr) vsprintf(buffer,format, argptr) + #pragma message("Using sprintf() because no snprintf()-like function defined") +#endif + +// ---------------------------------------------------------------------------- // global functions -// =========================================================================== +// ---------------------------------------------------------------------------- #ifdef STD_STRING_COMPATIBILITY @@ -76,13 +119,34 @@ extern const char *g_szNul = (const char *)(&g_strEmpty[3]); // iostream ones. // // ATTN: you can _not_ use both of these in the same program! -#if 0 // def _MSC_VER - #include - #define NAMESPACE std:: +#if wxUSE_IOSTREAMH +#include +#define NAMESPACE +#else +#include +# ifdef _MSC_VER + using namespace std; +# endif +// for msvc (bcc50+ also) you don't need these NAMESPACE defines, +// using namespace std; takes care of that. +#define NAMESPACE std:: +#endif + +#ifdef __WXMSW__ + #ifdef _MSC_VER + #define wxVsprintf _vsnprintf + #endif #else - #include - #define NAMESPACE -#endif //Visual C++ + #if defined ( HAVE_VSNPRINTF ) + #define wxVsprintf vsnprintf + #endif +#endif + +#ifndef wxVsprintf + // vsprintf() is ANSI so we can always use it, but it's unsafe! + #define wxVsprintf(buffer,len,format,argptr) vsprintf(buffer,format, argptr) + #pragma message("Using sprintf() because no snprintf()-like function defined") +#endif NAMESPACE istream& operator>>(NAMESPACE istream& is, wxString& WXUNUSED(str)) { @@ -101,7 +165,7 @@ NAMESPACE istream& operator>>(NAMESPACE istream& is, wxString& WXUNUSED(str)) sb->sungetc(); break; } - + str += ch; if ( --w == 1 ) break; @@ -117,6 +181,35 @@ NAMESPACE istream& operator>>(NAMESPACE istream& is, wxString& WXUNUSED(str)) #endif //std::string compatibility +// ---------------------------------------------------------------------------- +// private classes +// ---------------------------------------------------------------------------- + +// this small class is used to gather statistics for performance tuning +//#define WXSTRING_STATISTICS +#ifdef WXSTRING_STATISTICS + class Averager + { + public: + Averager(const char *sz) { m_sz = sz; m_nTotal = m_nCount = 0; } + ~Averager() + { printf("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 char *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 + // =========================================================================== // wxString class core // =========================================================================== @@ -125,27 +218,6 @@ NAMESPACE istream& operator>>(NAMESPACE istream& is, wxString& WXUNUSED(str)) // construction // --------------------------------------------------------------------------- -// construct an empty string -wxString::wxString() -{ - Init(); -} - -// copy constructor -wxString::wxString(const wxString& stringSrc) -{ - wxASSERT( stringSrc.GetStringData()->IsValid() ); - - 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 - } -} - // constructs string of copies of character wxString::wxString(char ch, size_t nLength) { @@ -170,40 +242,27 @@ void wxString::InitWith(const char *psz, size_t nPos, size_t nLength) 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)); } } - -// 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); } +#ifdef STD_STRING_COMPATIBILITY + // poor man's iterators are "void *" pointers wxString::wxString(const void *pStart, const void *pEnd) { - InitWith((const char *)pStart, 0, + InitWith((const char *)pStart, 0, (const char *)pEnd - (const char *)pStart); } @@ -213,7 +272,17 @@ wxString::wxString(const void *pStart, const void *pEnd) wxString::wxString(const wchar_t *pwz) { // first get necessary size - size_t nLen = wcstombs(NULL, pwz, 0); + + // NB: GNU libc5 wcstombs() is completely broken, don't use it (it doesn't + // honor the 3rd parameter, thus it will happily crash here). +#ifdef wxUSE_WCSRTOMBS + // don't know if it's really needed (or if we can pass NULL), but better safe + // than quick + mbstate_t mbstate; + size_t nLen = wcsrtombs((char *) NULL, &pwz, 0, &mbstate); +#else // !GNU libc + size_t nLen = wcstombs((char *) NULL, pwz, 0); +#endif // GNU // empty? if ( nLen != 0 ) { @@ -235,33 +304,18 @@ void wxString::AllocBuffer(size_t nLen) wxASSERT( nLen > 0 ); // wxASSERT( nLen <= INT_MAX-1 ); // max size (enough room for 1 extra) + STATISTICS_ADD(Length, nLen); + // allocate memory: // 1) one extra character for '\0' termination // 2) sizeof(wxStringData) for housekeeping info - wxStringData* pData = (wxStringData*)new char[sizeof(wxStringData) + - (nLen + 1)*sizeof(char)]; + wxStringData* pData = (wxStringData*) + malloc(sizeof(wxStringData) + (nLen + EXTRA_ALLOC + 1)*sizeof(char)); 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 -} - -// releases the string memory and reinits it -void wxString::Reinit() -{ - GetStringData()->Unlock(); - Init(); -} - -// wrapper around wxString::Reinit -void wxString::Empty() -{ - if ( GetStringData()->nDataLength != 0 ) - Reinit(); - - wxASSERT( GetStringData()->nDataLength == 0 ); - wxASSERT( GetStringData()->nAllocLength == 0 ); + m_pchData[nLen] = '\0'; } // must be called before changing this string @@ -271,11 +325,12 @@ void wxString::CopyBeforeWrite() 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; + AllocBuffer(nLen); + memcpy(m_pchData, pData->data(), nLen*sizeof(char)); } - wxASSERT( !pData->IsShared() ); // we must be the only owner + wxASSERT( !GetStringData()->IsShared() ); // we must be the only owner } // must be called before replacing contents of this string @@ -284,7 +339,7 @@ void wxString::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(); + wxStringData* pData = GetStringData(); if ( pData->IsShared() || (nLen > pData->nAllocLength) ) { // can't work with old buffer, get new one pData->Unlock(); @@ -294,8 +349,66 @@ void wxString::AllocBeforeWrite(size_t nLen) wxASSERT( !GetStringData()->IsShared() ); // we must be the only owner } +// allocate enough memory for nLen characters +void wxString::Alloc(size_t nLen) +{ + wxStringData *pData = GetStringData(); + if ( pData->nAllocLength <= nLen ) { + if ( pData->IsEmpty() ) { + nLen += EXTRA_ALLOC; + + wxStringData* pData = (wxStringData*) + malloc(sizeof(wxStringData) + (nLen + 1)*sizeof(char)); + pData->nRefs = 1; + pData->nDataLength = 0; + pData->nAllocLength = nLen; + m_pchData = pData->data(); // data starts after wxStringData + m_pchData[0u] = '\0'; + } + else if ( pData->IsShared() ) { + pData->Unlock(); // memory not freed because shared + size_t nOldLen = pData->nDataLength; + AllocBuffer(nLen); + memcpy(m_pchData, pData->data(), nOldLen*sizeof(char)); + } + else { + nLen += EXTRA_ALLOC; + + wxStringData *p = (wxStringData *) + realloc(pData, sizeof(wxStringData) + (nLen + 1)*sizeof(char)); + + if ( p == NULL ) { + // @@@ what to do on memory error? + return; + } + + // 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) + p->nAllocLength = nLen; + m_pchData = p->data(); + } + } + //else: we've already got enough +} + +// shrink to minimal size (releasing extra memory) +void wxString::Shrink() +{ + wxStringData *pData = GetStringData(); + + // this variable is unused in release build, so avoid the compiler warning by + // just not declaring it +#ifdef __WXDEBUG__ + void *p = +#endif + realloc(pData, sizeof(wxStringData) + (pData->nDataLength + 1)*sizeof(char)); + + wxASSERT( p != NULL ); // can't free memory? + wxASSERT( p == pData ); // we're decrementing the size - block shouldn't move! +} + // get the pointer to writable buffer of (at least) nLen bytes -char *wxString::GetWriteBuf(int nLen) +char *wxString::GetWriteBuf(size_t nLen) { AllocBeforeWrite(nLen); @@ -312,12 +425,6 @@ void wxString::UngetWriteBuf() GetStringData()->Validate(TRUE); } -// dtor frees memory if no other strings use it -wxString::~wxString() -{ - GetStringData()->Unlock(); -} - // --------------------------------------------------------------------------- // data access // --------------------------------------------------------------------------- @@ -328,7 +435,7 @@ wxString::~wxString() // assignment operators // --------------------------------------------------------------------------- -// helper function: does real copy +// helper function: does real copy void wxString::AssignCopy(size_t nSrcLen, const char *pszSrcData) { if ( nSrcLen == 0 ) { @@ -395,95 +502,52 @@ wxString& wxString::operator=(const wchar_t *pwz) // string concatenation // --------------------------------------------------------------------------- -// 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)); - } -} - // add something to this string void wxString::ConcatSelf(int nSrcLen, const char *pszSrcData) { + STATISTICS_ADD(SummandLength, nSrcLen); + // concatenating an empty string is a NOP - if ( nSrcLen != 0 ) { - register wxStringData *pData = GetStringData(); + 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() || - pData->nDataLength + nSrcLen > pData->nAllocLength ) { - // we have to grow the buffer, use the ConcatCopy routine - // (which will allocate memory) + if ( pData->IsShared() ) { + STATISTICS_ADD(ConcatHit, 0); + + // we have to allocate another buffer wxStringData* pOldData = GetStringData(); - ConcatCopy(pOldData->nDataLength, m_pchData, nSrcLen, pszSrcData); + AllocBuffer(nNewLen); + memcpy(m_pchData, pOldData->data(), nLen*sizeof(char)); pOldData->Unlock(); } - else { - // fast concatenation when buffer big enough - memcpy(m_pchData + pData->nDataLength, pszSrcData, nSrcLen*sizeof(char)); - pData->nDataLength += nSrcLen; + else if ( nNewLen > pData->nAllocLength ) { + STATISTICS_ADD(ConcatHit, 0); - // should be enough space - wxASSERT( pData->nDataLength <= pData->nAllocLength ); - - m_pchData[pData->nDataLength] = '\0'; // put terminating '\0' + // we have to grow the buffer + Alloc(nNewLen); } - } -} - -/* - * string may be concatenated with other string, C string or a character - */ + else { + STATISTICS_ADD(ConcatHit, 1); -void wxString::operator+=(const wxString& string) -{ - wxASSERT( string.GetStringData()->IsValid() ); + // the buffer is already big enough + } - ConcatSelf(string.Len(), string); -} + // should be enough space + wxASSERT( nNewLen <= GetStringData()->nAllocLength ); -void wxString::operator+=(const char *psz) -{ - ConcatSelf(Strlen(psz), psz); -} + // fast concatenation - all is done in our buffer + memcpy(m_pchData + nLen, pszSrcData, nSrcLen*sizeof(char)); -void wxString::operator+=(char ch) -{ - ConcatSelf(1, &ch); + m_pchData[nNewLen] = '\0'; // put terminating '\0' + GetStringData()->nDataLength = nNewLen; // and fix the length + } + //else: the string to append was empty } /* - * Same as above but return the result - */ - -wxString& wxString::operator<<(const wxString& string) -{ - wxASSERT( string.GetStringData()->IsValid() ); - - ConcatSelf(string.Len(), string); - return *this; -} - -wxString& wxString::operator<<(const char *psz) -{ - ConcatSelf(Strlen(psz), psz); - return *this; -} - -wxString& wxString::operator<<(char ch) -{ - ConcatSelf(1, &ch); - return *this; -} - -/* * concatenation functions come in 5 flavours: * string + string * char + string and string + char @@ -495,18 +559,19 @@ wxString operator+(const wxString& string1, const wxString& string2) wxASSERT( string1.GetStringData()->IsValid() ); wxASSERT( string2.GetStringData()->IsValid() ); - wxString s; - s.ConcatCopy(string1.GetStringData()->nDataLength, string1.m_pchData, - string2.GetStringData()->nDataLength, string2.m_pchData); + wxString s = string1; + s += string2; + return s; } -wxString operator+(const wxString& string1, char ch) +wxString operator+(const wxString& string, char ch) { - wxASSERT( string1.GetStringData()->IsValid() ); + wxASSERT( string.GetStringData()->IsValid() ); + + wxString s = string; + s += ch; - wxString s; - s.ConcatCopy(string1.GetStringData()->nDataLength, string1.m_pchData, 1, &ch); return s; } @@ -514,8 +579,9 @@ wxString operator+(char ch, const wxString& string) { wxASSERT( string.GetStringData()->IsValid() ); - wxString s; - s.ConcatCopy(1, &ch, string.GetStringData()->nDataLength, string.m_pchData); + wxString s = ch; + s += string; + return s; } @@ -524,8 +590,10 @@ wxString operator+(const wxString& string, const char *psz) wxASSERT( string.GetStringData()->IsValid() ); wxString s; - s.ConcatCopy(string.GetStringData()->nDataLength, string.m_pchData, - Strlen(psz), psz); + s.Alloc(Strlen(psz) + string.Len()); + s = string; + s += psz; + return s; } @@ -534,8 +602,10 @@ wxString operator+(const char *psz, const wxString& string) wxASSERT( string.GetStringData()->IsValid() ); wxString s; - s.ConcatCopy(Strlen(psz), psz, - string.GetStringData()->nDataLength, string.m_pchData); + s.Alloc(Strlen(psz) + string.Len()); + s = psz; + s += string; + return s; } @@ -550,32 +620,42 @@ wxString operator+(const char *psz, const wxString& string) // helper function: clone the data attached to this string void wxString::AllocCopy(wxString& dest, int nCopyLen, int nCopyIndex) const { - if ( nCopyLen == 0 ) - { + if ( nCopyLen == 0 ) { dest.Init(); } - else - { + else { dest.AllocBuffer(nCopyLen); memcpy(dest.m_pchData, m_pchData + nCopyIndex, nCopyLen*sizeof(char)); } } // 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 { + wxStringData *pData = GetStringData(); + size_t nLen = pData->nDataLength; + + // default value of nCount is STRING_MAXLEN and means "till the end" + if ( nCount == STRING_MAXLEN ) + { + nCount = nLen - nFirst; + } + // out-of-bounds requests return sensible things - if ( nCount == 0 ) - nCount = GetStringData()->nDataLength - nFirst; + if ( nFirst + nCount > nLen ) + { + nCount = nLen - nFirst; + } - if ( nFirst + nCount > (size_t)GetStringData()->nDataLength ) - nCount = GetStringData()->nDataLength - nFirst; - if ( nFirst > (size_t)GetStringData()->nDataLength ) + if ( nFirst > nLen ) + { + // AllocCopy() will return empty string nCount = 0; + } wxString dest; AllocCopy(dest, nCount, nFirst); + return dest; } @@ -651,15 +731,15 @@ wxString wxString::After(char ch) const } // 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 char *szOld, const char *szNew, bool bReplaceAll) { - uint uiCount = 0; // count of replacements made + size_t uiCount = 0; // count of replacements made - uint uiOldLen = Strlen(szOld); + size_t uiOldLen = Strlen(szOld); wxString strTemp; const char *pCurrent = m_pchData; - const char *pSubstr; + const char *pSubstr; while ( *pCurrent != '\0' ) { pSubstr = strstr(pCurrent, szOld); if ( pSubstr == NULL ) { @@ -701,7 +781,7 @@ bool wxString::IsAscii() const } return(TRUE); } - + bool wxString::IsWord() const { const char *s = (const char*) *this; @@ -711,7 +791,7 @@ bool wxString::IsWord() const } return(TRUE); } - + bool wxString::IsNumber() const { const char *s = (const char*) *this; @@ -722,10 +802,6 @@ bool wxString::IsNumber() const return(TRUE); } -// kludge: we don't have declaraton of wxStringData here, so we add offsets -// manually to get to the "length" field of wxStringData structure -bool wxString::IsEmpty() const { return Len() == 0; } - wxString wxString::Strip(stripType w) const { wxString s = *this; @@ -734,33 +810,6 @@ wxString wxString::Strip(stripType w) const return s; } -/// case-insensitive strcmp() (platform independent) -int Stricmp(const char *psz1, const char *psz2) -{ -#if defined(_MSC_VER) - return _stricmp(psz1, psz2); -#elif defined(__BORLANDC__) - return stricmp(psz1, psz2); -#elif defined(__UNIX__) || defined(__GNUWIN32__) - return strcasecmp(psz1, psz2); -#else - // almost all compilers/libraries provide this function (unfortunately under - // different names), that's why we don't implement our own which will surely - // be more efficient than this code (uncomment to use): - /* - register char c1, c2; - do { - c1 = tolower(*psz1++); - c2 = tolower(*psz2++); - } while ( c1 && (c1 == c2) ); - - return c1 - c2; - */ - - #error "Please define string case-insensitive compare for your OS/compiler" -#endif // OS/compiler -} - // --------------------------------------------------------------------------- // case conversion // --------------------------------------------------------------------------- @@ -778,7 +827,7 @@ wxString& wxString::MakeUpper() wxString& wxString::MakeLower() { CopyBeforeWrite(); - + for ( char *p = m_pchData; *p; p++ ) *p = (char)tolower(*p); @@ -792,30 +841,40 @@ wxString& wxString::MakeLower() // trims spaces (in the sense of isspace) from left or right side wxString& wxString::Trim(bool bFromRight) { - CopyBeforeWrite(); - - if ( bFromRight ) + // first check if we're going to modify the string at all + if ( !IsEmpty() && + ( + (bFromRight && isspace(GetChar(Len() - 1))) || + (!bFromRight && isspace(GetChar(0u))) + ) + ) { - // 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; + // ok, there is at least one space to trim + CopyBeforeWrite(); + + 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; + } } return *this; @@ -866,6 +925,33 @@ int wxString::Find(const char *pszSub) const return (psz == NULL) ? NOT_FOUND : psz - m_pchData; } +// --------------------------------------------------------------------------- +// stream-like operators +// --------------------------------------------------------------------------- +wxString& wxString::operator<<(int i) +{ + wxString res; + res.Printf("%d", i); + + return (*this) << res; +} + +wxString& wxString::operator<<(float f) +{ + wxString res; + res.Printf("%f", f); + + return (*this) << res; +} + +wxString& wxString::operator<<(double d) +{ + wxString res; + res.Printf("%g", d); + + return (*this) << res; +} + // --------------------------------------------------------------------------- // formatted output // --------------------------------------------------------------------------- @@ -883,39 +969,45 @@ int wxString::Printf(const char *pszFormat, ...) int wxString::PrintfV(const char* pszFormat, va_list argptr) { + // static buffer to avoid dynamic memory allocation each time static char s_szScratch[1024]; - int iLen = vsprintf(s_szScratch, pszFormat, argptr); - AllocBeforeWrite(iLen); - strcpy(m_pchData, s_szScratch); + // NB: wxVsprintf() may return either less than the buffer size or -1 if there + // is not enough place depending on implementation + int iLen = wxVsprintf(s_szScratch, WXSIZEOF(s_szScratch), pszFormat, argptr); + char *buffer; + if ( iLen < (int)WXSIZEOF(s_szScratch) ) { + buffer = s_szScratch; + } + else { + int size = WXSIZEOF(s_szScratch) * 2; + buffer = (char *)malloc(size); + while ( buffer != NULL ) { + iLen = wxVsprintf(buffer, WXSIZEOF(s_szScratch), pszFormat, argptr); + if ( iLen < size ) { + // ok, there was enough space + break; + } - return iLen; -} + // still not enough, double it again + buffer = (char *)realloc(buffer, size *= 2); + } -#if 0 -int wxString::Scanf(const char *pszFormat, ...) const -{ - va_list argptr; - va_start(argptr, pszFormat); + if ( !buffer ) { + // out of memory + return -1; + } + } - int iLen = ScanfV(pszFormat, argptr); + AllocBeforeWrite(iLen); + strcpy(m_pchData, buffer); - va_end(argptr); + if ( buffer != s_szScratch ) + free(buffer); return iLen; } -int wxString::ScanfV(const char *pszFormat, va_list argptr) const -{ -#ifdef __WINDOWS__ - wxMessageBox("ScanfV not implemented"); - return 0; -#else - return vsscanf(c_str(), pszFormat, argptr); -#endif -} -#endif - // ---------------------------------------------------------------------------- // misc other operations // ---------------------------------------------------------------------------- @@ -944,7 +1036,7 @@ bool wxString::Matches(const char *pszMask) const return TRUE; // are there any other metacharacters in the mask? - uint uiLenMask; + size_t uiLenMask; const char *pEndMask = strpbrk(pszMask, "*?"); if ( pEndMask != NULL ) { @@ -988,14 +1080,17 @@ 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); - *this = strTmp; - - return *this; + if ( !str.IsEmpty() ) { + 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; + } + + return *this; } size_t wxString::find(const wxString& str, size_t nStart) const @@ -1004,7 +1099,7 @@ size_t wxString::find(const wxString& str, size_t nStart) const wxASSERT( nStart <= Len() ); const char *p = strstr(c_str() + nStart, str); - + return p == NULL ? npos : p - c_str(); } @@ -1015,13 +1110,13 @@ 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); - + return p == NULL ? npos : p - c_str(); } @@ -1037,10 +1132,10 @@ size_t wxString::rfind(const wxString& str, size_t nStart) const return p - str.Len() - c_str(); p--; } - + 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 @@ -1053,7 +1148,7 @@ size_t wxString::rfind(char ch, size_t nStart) const wxASSERT( nStart <= Len() ); const char *p = strrchr(c_str() + nStart, ch); - + return p == NULL ? npos : p - c_str(); } #endif @@ -1091,7 +1186,7 @@ wxString& wxString::replace(size_t nStart, size_t nLen, const char *sz) strTmp.append(c_str(), nStart); strTmp += sz; strTmp.append(c_str() + nStart + nLen); - + *this = strTmp; return *this; } @@ -1101,13 +1196,13 @@ wxString& wxString::replace(size_t nStart, size_t nLen, size_t nCount, char ch) return replace(nStart, nLen, wxString(ch, nCount)); } -wxString& wxString::replace(size_t nStart, size_t nLen, +wxString& wxString::replace(size_t nStart, size_t nLen, const wxString& str, size_t nStart2, size_t nLen2) { return replace(nStart, nLen, str.substr(nStart2, nLen2)); } -wxString& wxString::replace(size_t nStart, size_t nLen, +wxString& wxString::replace(size_t nStart, size_t nLen, const char* sz, size_t nCount) { return replace(nStart, nLen, wxString(sz, nCount)); @@ -1132,36 +1227,32 @@ wxArrayString::wxArrayString() { m_nSize = m_nCount = 0; - m_pItems = NULL; + m_pItems = (char **) NULL; } // copy ctor wxArrayString::wxArrayString(const wxArrayString& src) { - m_nSize = src.m_nSize; - m_nCount = src.m_nCount; - - if ( m_nSize != 0 ) - m_pItems = new char *[m_nSize]; - else - m_pItems = NULL; + m_nSize = + m_nCount = 0; + m_pItems = (char **) 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 ( src.m_nCount > ARRAY_DEFAULT_INITIAL_SIZE ) + Alloc(src.m_nCount); - if ( m_nSize != 0 ) - m_pItems = new char *[m_nSize]; - else - m_pItems = NULL; + // we can't just copy the pointers here because otherwise we would share + // the strings with another array + for ( size_t n = 0; n < src.m_nCount; n++ ) + Add(src[n]); if ( m_nCount != 0 ) memcpy(m_pItems, src.m_pItems, m_nCount*sizeof(char *)); @@ -1180,8 +1271,13 @@ void wxArrayString::Grow() m_pItems = new char *[m_nSize]; } else { + // otherwise when it's called for the first time, nIncrement would be 0 + // and the array would never be expanded + wxASSERT( ARRAY_DEFAULT_INITIAL_SIZE != 0 ); + // add 50% but not too much - size_t nIncrement = m_nSize >> 1; + size_t nIncrement = m_nSize < ARRAY_DEFAULT_INITIAL_SIZE + ? ARRAY_DEFAULT_INITIAL_SIZE : m_nSize >> 1; if ( nIncrement > ARRAY_MAXSIZE_INCREMENT ) nIncrement = ARRAY_MAXSIZE_INCREMENT; m_nSize += nIncrement; @@ -1191,7 +1287,7 @@ void wxArrayString::Grow() memcpy(pNew, m_pItems, m_nCount*sizeof(char *)); // delete old memory (but do not release the strings!) - DELETEA(m_pItems); + wxDELETEA(m_pItems); m_pItems = pNew; } @@ -1218,11 +1314,10 @@ void wxArrayString::Clear() { Free(); - m_nSize = + m_nSize = m_nCount = 0; - DELETEA(m_pItems); - m_pItems = NULL; + wxDELETEA(m_pItems); } // dtor @@ -1230,7 +1325,7 @@ wxArrayString::~wxArrayString() { Free(); - DELETEA(m_pItems); + wxDELETEA(m_pItems); } // pre-allocates memory (frees the previous data!) @@ -1241,7 +1336,7 @@ void wxArrayString::Alloc(size_t nSize) // only if old buffer was not big enough if ( nSize > m_nSize ) { Free(); - DELETEA(m_pItems); + wxDELETEA(m_pItems); m_pItems = new char *[nSize]; m_nSize = nSize; } @@ -1250,14 +1345,11 @@ void wxArrayString::Alloc(size_t nSize) } // searches the array for an item (forward or backwards) - -// Robert Roebling (changed to bool from bool) - int wxArrayString::Index(const char *sz, bool bCase, bool bFromEnd) const { if ( bFromEnd ) { if ( m_nCount > 0 ) { - uint ui = m_nCount; + size_t ui = m_nCount; do { if ( STRING(m_pItems[--ui])->IsSameAs(sz, bCase) ) return ui; @@ -1266,7 +1358,7 @@ int wxArrayString::Index(const char *sz, bool bCase, bool bFromEnd) const } } else { - for( uint ui = 0; ui < m_nCount; ui++ ) { + for( size_t ui = 0; ui < m_nCount; ui++ ) { if( STRING(m_pItems[ui])->IsSameAs(sz, bCase) ) return ui; } @@ -1292,11 +1384,11 @@ void wxArrayString::Insert(const wxString& str, size_t nIndex) { wxASSERT( str.GetStringData()->IsValid() ); - wxCHECK_RET( nIndex <= m_nCount, "bad index in wxArrayString::Insert" ); + wxCHECK_RET( nIndex <= m_nCount, ("bad index in wxArrayString::Insert") ); Grow(); - memmove(&m_pItems[nIndex + 1], &m_pItems[nIndex], + memmove(&m_pItems[nIndex + 1], &m_pItems[nIndex], (m_nCount - nIndex)*sizeof(char *)); str.GetStringData()->Lock(); @@ -1308,12 +1400,12 @@ void wxArrayString::Insert(const wxString& str, size_t nIndex) // removes item from array (by index) void wxArrayString::Remove(size_t nIndex) { - wxCHECK_RET( nIndex <= m_nCount, "bad index in wxArrayString::Remove" ); + wxCHECK_RET( nIndex <= m_nCount, _("bad index in wxArrayString::Remove") ); // release our lock Item(nIndex).GetStringData()->Unlock(); - memmove(&m_pItems[nIndex], &m_pItems[nIndex + 1], + memmove(&m_pItems[nIndex], &m_pItems[nIndex + 1], (m_nCount - nIndex - 1)*sizeof(char *)); m_nCount--; } @@ -1324,14 +1416,14 @@ void wxArrayString::Remove(const char *sz) int iIndex = Index(sz); wxCHECK_RET( iIndex != NOT_FOUND, - "removing inexistent element in wxArrayString::Remove" ); + _("removing inexistent element in wxArrayString::Remove") ); - Remove((size_t)iIndex); + Remove(iIndex); } // sort array elements using passed comparaison function -void wxArrayString::Sort(bool bCase, bool bReverse) +void wxArrayString::Sort(bool WXUNUSED(bCase), bool WXUNUSED(bReverse) ) { //@@@@ TO DO //qsort(m_pItems, m_nCount, sizeof(char *), fCmp);