X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/a3622daa901777a33969d8bc04e2d62dee14d164..884470b12ee25b20796bfef11a9bfa5fb1e1511c:/src/common/string.cpp?ds=inline diff --git a/src/common/string.cpp b/src/common/string.cpp index ac64abaeb6..5329f085e2 100644 --- a/src/common/string.cpp +++ b/src/common/string.cpp @@ -32,59 +32,121 @@ #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 +#ifdef __SALFORDC__ +#include +#endif + +#if 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) -#define EXTRA_ALLOC 16 +// NB: EXTRA_ALLOC must be >= 0! +#define EXTRA_ALLOC (19 - nLen % 16) // --------------------------------------------------------------------------- // static class variables definition // --------------------------------------------------------------------------- -#ifdef STD_STRING_COMPATIBILITY +#ifdef wxSTD_STRING_COMPATIBILITY const size_t wxString::npos = STRING_MAXLEN; -#endif +#endif // wxSTD_STRING_COMPATIBILITY // ---------------------------------------------------------------------------- // static data // ---------------------------------------------------------------------------- -// 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 +// 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' }; + // 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 WXDLLEXPORT *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) +#ifndef __SC__ + #pragma message("Using sprintf() because no snprintf()-like function defined") +#endif +#endif // ---------------------------------------------------------------------------- // global functions // ---------------------------------------------------------------------------- -#ifdef STD_STRING_COMPATIBILITY +#ifdef wxSTD_STRING_COMPATIBILITY // 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:: +#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)) { @@ -130,13 +192,13 @@ NAMESPACE istream& operator>>(NAMESPACE istream& is, wxString& WXUNUSED(str)) { public: Averager(const char *sz) { m_sz = sz; m_nTotal = m_nCount = 0; } - ~Averager() + ~Averager() { printf("wxString: average %s = %f\n", m_sz, ((float)m_nTotal)/m_nCount); } - void Add(uint n) { m_nTotal += n; m_nCount++; } + void Add(size_t n) { m_nTotal += n; m_nCount++; } private: - uint m_nCount, m_nTotal; + size_t m_nCount, m_nTotal; const char *m_sz; } g_averageLength("allocation size"), g_averageSummandLength("summand length"), @@ -195,7 +257,7 @@ wxString::wxString(const unsigned char* psz, size_t nLength) InitWith((const char *)psz, 0, nLength); } -#ifdef STD_STRING_COMPATIBILITY +#ifdef wxSTD_STRING_COMPATIBILITY // poor man's iterators are "void *" pointers wxString::wxString(const void *pStart, const void *pEnd) @@ -210,7 +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). +#if 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 ) { @@ -253,7 +325,7 @@ void wxString::CopyBeforeWrite() if ( pData->IsShared() ) { pData->Unlock(); // memory not freed because shared - uint nLen = pData->nDataLength; + size_t nLen = pData->nDataLength; AllocBuffer(nLen); memcpy(m_pchData, pData->data(), nLen*sizeof(char)); } @@ -273,12 +345,16 @@ void wxString::AllocBeforeWrite(size_t nLen) pData->Unlock(); AllocBuffer(nLen); } + else { + // update the string length + pData->nDataLength = nLen; + } wxASSERT( !GetStringData()->IsShared() ); // we must be the only owner } // allocate enough memory for nLen characters -void wxString::Alloc(uint nLen) +void wxString::Alloc(size_t nLen) { wxStringData *pData = GetStringData(); if ( pData->nAllocLength <= nLen ) { @@ -295,7 +371,7 @@ void wxString::Alloc(uint nLen) } else if ( pData->IsShared() ) { pData->Unlock(); // memory not freed because shared - uint nOldLen = pData->nDataLength; + size_t nOldLen = pData->nDataLength; AllocBuffer(nLen); memcpy(m_pchData, pData->data(), nOldLen*sizeof(char)); } @@ -336,7 +412,7 @@ void wxString::Shrink() } // get the pointer to writable buffer of (at least) nLen bytes -char *wxString::GetWriteBuf(uint nLen) +char *wxString::GetWriteBuf(size_t nLen) { AllocBeforeWrite(nLen); @@ -435,43 +511,44 @@ void wxString::ConcatSelf(int nSrcLen, const char *pszSrcData) { STATISTICS_ADD(SummandLength, nSrcLen); - // concatenating an empty string is a NOP, but it happens quite rarely, - // so we don't waste our time checking for it - // if ( nSrcLen > 0 ) - wxStringData *pData = GetStringData(); - uint nLen = pData->nDataLength; - uint 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(); - AllocBuffer(nNewLen); - memcpy(m_pchData, pOldData->data(), nLen*sizeof(char)); - pOldData->Unlock(); - } - else if ( nNewLen > pData->nAllocLength ) { - STATISTICS_ADD(ConcatHit, 0); + // 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(); + AllocBuffer(nNewLen); + memcpy(m_pchData, pOldData->data(), nLen*sizeof(char)); + pOldData->Unlock(); + } + else if ( nNewLen > pData->nAllocLength ) { + STATISTICS_ADD(ConcatHit, 0); - // we have to grow the buffer - Alloc(nNewLen); - } - else { - STATISTICS_ADD(ConcatHit, 1); + // we have to grow the buffer + Alloc(nNewLen); + } + else { + STATISTICS_ADD(ConcatHit, 1); - // the buffer is already big enough - } + // the buffer is already big enough + } - // should be enough space - wxASSERT( nNewLen <= GetStringData()->nAllocLength ); + // should be enough space + wxASSERT( nNewLen <= GetStringData()->nAllocLength ); - // fast concatenation - all is done in our buffer - memcpy(m_pchData + nLen, pszSrcData, nSrcLen*sizeof(char)); + // fast concatenation - all is done in our buffer + memcpy(m_pchData + nLen, pszSrcData, nSrcLen*sizeof(char)); - m_pchData[nNewLen] = '\0'; // put terminating '\0' - GetStringData()->nDataLength = nNewLen; // and fix the length + m_pchData[nNewLen] = '\0'; // put terminating '\0' + GetStringData()->nDataLength = nNewLen; // and fix the length + } + //else: the string to append was empty } /* @@ -557,20 +634,32 @@ void wxString::AllocCopy(wxString& dest, int nCopyLen, int nCopyIndex) const } // 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; } @@ -587,11 +676,11 @@ wxString wxString::Right(size_t nCount) const // 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(char ch) const { wxString str; int iPos = Find(ch, TRUE); - if ( iPos == NOT_FOUND ) + if ( iPos == wxNOT_FOUND ) str = *this; else str = c_str() + iPos + 1; @@ -612,7 +701,7 @@ wxString wxString::Left(size_t nCount) const // 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(char ch) const { wxString str; for ( const char *pc = m_pchData; *pc != '\0' && *pc != ch; pc++ ) @@ -623,11 +712,11 @@ wxString wxString::Left(char ch) const /// 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(char ch) const { wxString str; int iPos = Find(ch, TRUE); - if ( iPos != NOT_FOUND && iPos != 0 ) + if ( iPos != wxNOT_FOUND && iPos != 0 ) str = wxString(c_str(), iPos); return str; @@ -635,22 +724,22 @@ 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(char 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 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; @@ -756,30 +845,40 @@ 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 - (const char*) m_pchData); + memmove(m_pchData, psz, (nDataLength + 1)*sizeof(char)); + GetStringData()->nDataLength = nDataLength; + } } return *this; @@ -804,14 +903,19 @@ wxString& wxString::Pad(size_t nCount, char chPad, bool bFromRight) // truncate the string wxString& wxString::Truncate(size_t uiLen) { - *(m_pchData + uiLen) = '\0'; - GetStringData()->nDataLength = uiLen; + if ( uiLen < Len() ) { + CopyBeforeWrite(); + + *(m_pchData + uiLen) = '\0'; + GetStringData()->nDataLength = uiLen; + } + //else: nothing to do, string is already short enough return *this; } // --------------------------------------------------------------------------- -// finding (return NOT_FOUND if not found and index otherwise) +// finding (return wxNOT_FOUND if not found and index otherwise) // --------------------------------------------------------------------------- // find a character @@ -819,7 +923,7 @@ int wxString::Find(char ch, bool bFromEnd) const { const char *psz = bFromEnd ? strrchr(m_pchData, ch) : strchr(m_pchData, ch); - return (psz == NULL) ? NOT_FOUND : psz - m_pchData; + return (psz == NULL) ? wxNOT_FOUND : psz - (const char*) m_pchData; } // find a sub-string (like strstr) @@ -827,7 +931,34 @@ int wxString::Find(const char *pszSub) const { const char *psz = strstr(m_pchData, pszSub); - return (psz == NULL) ? NOT_FOUND : psz - m_pchData; + return (psz == NULL) ? wxNOT_FOUND : psz - (const char*) 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; } // --------------------------------------------------------------------------- @@ -847,11 +978,41 @@ 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); + // 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; + } + + // still not enough, double it again + buffer = (char *)realloc(buffer, size *= 2); + } + + if ( !buffer ) { + // out of memory + return -1; + } + } + AllocBeforeWrite(iLen); - strcpy(m_pchData, s_szScratch); + strcpy(m_pchData, buffer); + + if ( buffer != s_szScratch ) + free(buffer); return iLen; } @@ -884,7 +1045,7 @@ 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 ) { @@ -918,23 +1079,38 @@ bool wxString::Matches(const char *pszMask) const return *pszTxt == '\0'; } +// Count the number of chars +int wxString::Freq(char ch) const +{ + int count = 0; + int len = Len(); + for (int i = 0; i < len; i++) + { + if (GetChar(i) == ch) + count ++; + } + return count; +} + // --------------------------------------------------------------------------- // standard C++ library string functions // --------------------------------------------------------------------------- -#ifdef STD_STRING_COMPATIBILITY +#ifdef wxSTD_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 ( !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; } @@ -957,6 +1133,8 @@ size_t wxString::find(const char* sz, size_t nStart, size_t n) const } #endif +// Gives a duplicate symbol (presumably a case-insensitivity problem) +#if !defined(__BORLANDC__) size_t wxString::find(char ch, size_t nStart) const { wxASSERT( nStart <= Len() ); @@ -965,6 +1143,7 @@ size_t wxString::find(char ch, size_t nStart) const return p == NULL ? npos : p - c_str(); } +#endif size_t wxString::rfind(const wxString& str, size_t nStart) const { @@ -1073,7 +1252,7 @@ wxArrayString::wxArrayString() { m_nSize = m_nCount = 0; - m_pItems = NULL; + m_pItems = (char **) NULL; } // copy ctor @@ -1081,7 +1260,7 @@ wxArrayString::wxArrayString(const wxArrayString& src) { m_nSize = m_nCount = 0; - m_pItems = NULL; + m_pItems = (char **) NULL; *this = src; } @@ -1089,15 +1268,15 @@ wxArrayString::wxArrayString(const wxArrayString& src) // assignment operator wxArrayString& wxArrayString::operator=(const wxArrayString& src) { - Clear(); + if ( m_nSize > 0 ) + Clear(); - m_nSize = 0; if ( src.m_nCount > ARRAY_DEFAULT_INITIAL_SIZE ) Alloc(src.m_nCount); // we can't just copy the pointers here because otherwise we would share // the strings with another array - for ( uint n = 0; n < src.m_nCount; n++ ) + for ( size_t n = 0; n < src.m_nCount; n++ ) Add(src[n]); if ( m_nCount != 0 ) @@ -1195,7 +1374,7 @@ 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; @@ -1204,13 +1383,13 @@ 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; } } - return NOT_FOUND; + return wxNOT_FOUND; } // add item at the end @@ -1230,7 +1409,7 @@ 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(); @@ -1246,7 +1425,7 @@ 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(); @@ -1261,10 +1440,10 @@ void wxArrayString::Remove(const char *sz) { int iIndex = Index(sz); - wxCHECK_RET( iIndex != NOT_FOUND, - "removing inexistent element in wxArrayString::Remove" ); + wxCHECK_RET( iIndex != wxNOT_FOUND, + _("removing inexistent element in wxArrayString::Remove") ); - Remove((size_t)iIndex); + Remove(iIndex); } // sort array elements using passed comparaison function