X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/467e04791c0d5914dc8ed8e535af607f7fc1dfe1..e319bb30f7e88242f56144fcc279b57047566a6b:/src/common/string.cpp diff --git a/src/common/string.cpp b/src/common/string.cpp index aa039f976b..2a98946787 100644 --- a/src/common/string.cpp +++ b/src/common/string.cpp @@ -1,5 +1,5 @@ ///////////////////////////////////////////////////////////////////////////// -// Name: string.cpp +// Name: src/common/string.cpp // Purpose: wxString class // Author: Vadim Zeitlin, Ryan Norton // Modified by: @@ -25,22 +25,26 @@ #include "wx/wxprec.h" #ifdef __BORLANDC__ - #pragma hdrstop + #pragma hdrstop #endif #ifndef WX_PRECOMP - #include "wx/defs.h" - #include "wx/string.h" - #include "wx/intl.h" - #include "wx/thread.h" + #include "wx/string.h" + #include "wx/intl.h" + #include "wx/thread.h" #endif #include + +#ifndef __WXWINCE__ + #include +#endif + #include #include #ifdef __SALFORDC__ - #include + #include #endif // allocating extra space for each string consumes more memory but speeds up @@ -87,44 +91,8 @@ extern const wxChar WXDLLIMPEXP_BASE *wxEmptyString = &g_strEmpty.dummy; #if wxUSE_STD_IOSTREAM -// 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! - #include -wxSTD istream& operator>>(wxSTD istream& is, wxString& WXUNUSED(str)) -{ -#if 0 - int w = is.width(0); - if ( is.ipfx(0) ) { - streambuf *sb = is.rdbuf(); - str.erase(); - while ( true ) { - int ch = sb->sbumpc (); - if ( ch == EOF ) { - is.setstate(ios::eofbit); - break; - } - else if ( isspace(ch) ) { - sb->sungetc(); - break; - } - - str += ch; - if ( --w == 1 ) - break; - } - } - - is.isfx(); - if ( str.length() == 0 ) - is.setstate(ios::failbit); -#endif - return is; -} - wxSTD ostream& operator<<(wxSTD ostream& os, const wxString& str) { #ifdef __BORLANDC__ @@ -211,8 +179,16 @@ void wxStringBase::InitWith(const wxChar *psz, size_t nPos, size_t nLength) // poor man's iterators are "void *" pointers wxStringBase::wxStringBase(const void *pStart, const void *pEnd) { - InitWith((const wxChar *)pStart, 0, - (const wxChar *)pEnd - (const wxChar *)pStart); + if ( pEnd >= pStart ) + { + InitWith((const wxChar *)pStart, 0, + (const wxChar *)pEnd - (const wxChar *)pStart); + } + else + { + wxFAIL_MSG( _T("pStart is not before pEnd") ); + Init(); + } } wxStringBase::wxStringBase(size_type n, wxChar ch) @@ -471,36 +447,47 @@ void wxStringBase::swap(wxStringBase& str) size_t wxStringBase::find(const wxStringBase& str, size_t nStart) const { + // deal with the special case of empty string first + const size_t nLen = length(); + const size_t nLenOther = str.length(); + + if ( !nLenOther ) + { + // empty string is a substring of anything + return 0; + } + + if ( !nLen ) + { + // the other string is non empty so can't be our substring + return npos; + } + wxASSERT( str.GetStringData()->IsValid() ); - wxASSERT( nStart <= length() ); + wxASSERT( nStart <= nLen ); + + const wxChar * const other = str.c_str(); - //anchor + // anchor const wxChar* p = (const wxChar*)wxTmemchr(c_str() + nStart, - str.c_str()[0], - length() - nStart); + *other, + nLen - nStart); - if(!p) + if ( !p ) return npos; - while(p - c_str() + str.length() <= length() && - wxTmemcmp(p, str.c_str(), str.length()) ) + while ( p - c_str() + nLenOther <= nLen && wxTmemcmp(p, other, nLenOther) ) { - //Previosly passed as the first argument to wxTmemchr, - //but C/C++ standard does not specify evaluation order - //of arguments to functions - - //http://embedded.com/showArticle.jhtml?articleID=9900607 - ++p; - - //anchor again - p = (const wxChar*)wxTmemchr(p, - str.c_str()[0], - length() - (p - c_str())); - - if(!p) + p++; + + // anchor again + p = (const wxChar*)wxTmemchr(p, *other, nLen - (p - c_str())); + + if ( !p ) return npos; } - return (p - c_str() + str.length() <= length()) ? p - c_str() : npos; + return p - c_str() + nLenOther <= nLen ? p - c_str() : npos; } size_t wxStringBase::find(const wxChar* sz, size_t nStart, size_t n) const @@ -1090,16 +1077,21 @@ wxChar *wxString::GetWriteBuf(size_t nLen) // put string back in a reasonable state after GetWriteBuf void wxString::UngetWriteBuf() { - GetStringData()->nDataLength = wxStrlen(m_pchData); - GetStringData()->Validate(true); + UngetWriteBuf(wxStrlen(m_pchData)); } void wxString::UngetWriteBuf(size_t nLen) { - GetStringData()->nDataLength = nLen; - GetStringData()->Validate(true); + wxStringData * const pData = GetStringData(); + + wxASSERT_MSG( nLen < pData->nAllocLength, _T("buffer overrun") ); + + // the strings we store are always NUL-terminated + pData->data()[nLen] = _T('\0'); + pData->nDataLength = nLen; + pData->Validate(true); } -#endif +#endif // !wxUSE_STL // --------------------------------------------------------------------------- // data access @@ -1141,70 +1133,70 @@ wxString& wxString::operator=(const wchar_t *pwz) wxString operator+(const wxString& str1, const wxString& str2) { #if !wxUSE_STL - wxASSERT( str1.GetStringData()->IsValid() ); - wxASSERT( str2.GetStringData()->IsValid() ); + wxASSERT( str1.GetStringData()->IsValid() ); + wxASSERT( str2.GetStringData()->IsValid() ); #endif - wxString s = str1; - s += str2; + wxString s = str1; + s += str2; - return s; + return s; } wxString operator+(const wxString& str, wxChar ch) { #if !wxUSE_STL - wxASSERT( str.GetStringData()->IsValid() ); + wxASSERT( str.GetStringData()->IsValid() ); #endif - wxString s = str; - s += ch; + wxString s = str; + s += ch; - return s; + return s; } wxString operator+(wxChar ch, const wxString& str) { #if !wxUSE_STL - wxASSERT( str.GetStringData()->IsValid() ); + wxASSERT( str.GetStringData()->IsValid() ); #endif - wxString s = ch; - s += str; + wxString s = ch; + s += str; - return s; + return s; } wxString operator+(const wxString& str, const wxChar *psz) { #if !wxUSE_STL - wxASSERT( str.GetStringData()->IsValid() ); + wxASSERT( str.GetStringData()->IsValid() ); #endif - wxString s; - if ( !s.Alloc(wxStrlen(psz) + str.Len()) ) { - wxFAIL_MSG( _T("out of memory in wxString::operator+") ); - } - s += str; - s += psz; + wxString s; + if ( !s.Alloc(wxStrlen(psz) + str.length()) ) { + wxFAIL_MSG( _T("out of memory in wxString::operator+") ); + } + s += str; + s += psz; - return s; + return s; } wxString operator+(const wxChar *psz, const wxString& str) { #if !wxUSE_STL - wxASSERT( str.GetStringData()->IsValid() ); + wxASSERT( str.GetStringData()->IsValid() ); #endif - wxString s; - if ( !s.Alloc(wxStrlen(psz) + str.Len()) ) { - wxFAIL_MSG( _T("out of memory in wxString::operator+") ); - } - s = psz; - s += str; + wxString s; + if ( !s.Alloc(wxStrlen(psz) + str.length()) ) { + wxFAIL_MSG( _T("out of memory in wxString::operator+") ); + } + s = psz; + s += str; - return s; + return s; } // =========================================================================== @@ -1395,6 +1387,27 @@ bool wxString::StartsWith(const wxChar *prefix, wxString *rest) const 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 { @@ -1586,65 +1599,65 @@ 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(Len() - 1))) || - (!bFromRight && wxSafeIsspace(GetChar(0u))) + // 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 - iterator psz = begin() + length() - 1; - while ( wxSafeIsspace(*psz) && (psz >= begin()) ) - psz--; + if ( bFromRight ) + { + // find last non-space character + reverse_iterator psz = rbegin(); + while ( (psz != rend()) && wxSafeIsspace(*psz) ) + psz++; - // truncate at trailing space start - *++psz = wxT('\0'); - erase(psz, end()); - } - else - { - // find first non-space character - iterator psz = begin(); - while ( 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); + // fix up data and length + erase(begin(), psz); + } } - } - return *this; + 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); + wxString s(chPad, nCount); - if ( bFromRight ) - *this += s; - else - { - s += *this; - swap(s); - } + if ( bFromRight ) + *this += s; + else + { + s += *this; + swap(s); + } - return *this; + return *this; } // truncate the string wxString& wxString::Truncate(size_t uiLen) { - if ( uiLen < Len() ) { - erase(begin() + uiLen, end()); - } - //else: nothing to do, string is already short enough + if ( uiLen < length() ) + { + erase(begin() + uiLen, end()); + } + //else: nothing to do, string is already short enough - return *this; + return *this; } // --------------------------------------------------------------------------- @@ -1654,62 +1667,104 @@ wxString& wxString::Truncate(size_t uiLen) // find a character int wxString::Find(wxChar ch, bool bFromEnd) const { - size_type idx = bFromEnd ? find_last_of(ch) : find_first_of(ch); + size_type idx = bFromEnd ? find_last_of(ch) : find_first_of(ch); - return (idx == npos) ? wxNOT_FOUND : (int)idx; + return (idx == npos) ? wxNOT_FOUND : (int)idx; } // find a sub-string (like strstr) int wxString::Find(const wxChar *pszSub) const { - size_type idx = find(pszSub); + size_type idx = find(pszSub); - return (idx == npos) ? wxNOT_FOUND : (int)idx; + return (idx == npos) ? wxNOT_FOUND : (int)idx; } // ---------------------------------------------------------------------------- // conversion to numbers // ---------------------------------------------------------------------------- -bool wxString::ToLong(long *val, int base) const +// the implementation of all the functions below is exactly the same so factor +// it out + +template +bool wxStringToIntType(const wxChar *start, + T *val, + int base, + F func) { - wxCHECK_MSG( val, false, _T("NULL pointer in wxString::ToLong") ); + wxCHECK_MSG( val, false, _T("NULL output pointer") ); wxASSERT_MSG( !base || (base > 1 && base <= 36), _T("invalid base") ); - const wxChar *start = c_str(); +#ifndef __WXWINCE__ + errno = 0; +#endif + wxChar *end; - *val = wxStrtol(start, &end, base); + *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 - return !*end && (end != start); + // string was not empty to start with and no under/overflow occurred + return !*end && (end != start) +#ifndef __WXWINCE__ + && (errno != ERANGE) +#endif + ; +} + +bool wxString::ToLong(long *val, int base) const +{ + return wxStringToIntType(c_str(), val, base, wxStrtol); } bool wxString::ToULong(unsigned long *val, int base) const { - wxCHECK_MSG( val, false, _T("NULL pointer in wxString::ToULong") ); - wxASSERT_MSG( !base || (base > 1 && base <= 36), _T("invalid base") ); + return wxStringToIntType(c_str(), val, base, wxStrtoul); +} - const wxChar *start = c_str(); - wxChar *end; - *val = wxStrtoul(start, &end, base); +bool wxString::ToLongLong(wxLongLong_t *val, int base) const +{ +#ifdef wxHAS_STRTOLL + return wxStringToIntType(c_str(), val, base, wxStrtoll); +#else + // TODO: implement this ourselves + wxUnusedVar(val); + wxUnusedVar(base); + return false; +#endif // wxHAS_STRTOLL +} - // return true only if scan was stopped by the terminating NUL and if the - // string was not empty to start with - return !*end && (end != start); +bool wxString::ToULongLong(wxULongLong_t *val, int base) const +{ +#ifdef wxHAS_STRTOLL + return wxStringToIntType(c_str(), val, base, wxStrtoull); +#else + // TODO: implement this ourselves + wxUnusedVar(val); + wxUnusedVar(base); + return false; +#endif } bool wxString::ToDouble(double *val) const { wxCHECK_MSG( val, false, _T("NULL pointer in wxString::ToDouble") ); +#ifndef __WXWINCE__ + errno = 0; +#endif + const wxChar *start = c_str(); wxChar *end; *val = wxStrtod(start, &end); // return true only if scan was stopped by the terminating NUL and if the - // string was not empty to start with - return !*end && (end != start); + // string was not empty to start with and no under/overflow occurred + return !*end && (end != start) +#ifndef __WXWINCE__ + && (errno != ERANGE) +#endif + ; } // --------------------------------------------------------------------------- @@ -1786,9 +1841,11 @@ int wxString::PrintfV(const wxChar* pszFormat, va_list argptr) // current size of the buffer size *= 2; } - else if ( len > size ) + else if ( len >= size ) { - size = len; + // 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 { @@ -1799,7 +1856,7 @@ int wxString::PrintfV(const wxChar* pszFormat, va_list argptr) // we could have overshot Shrink(); - return Len(); + return length(); } // ---------------------------------------------------------------------------- @@ -1948,7 +2005,7 @@ match: int wxString::Freq(wxChar ch) const { int count = 0; - int len = Len(); + int len = length(); for (int i = 0; i < len; i++) { if (GetChar(i) == ch) @@ -2133,13 +2190,16 @@ void wxArrayString::Alloc(size_t nSize) { // only if old buffer was not big enough if ( nSize > m_nSize ) { - Free(); - wxDELETEA(m_pItems); - m_pItems = new wxChar *[nSize]; + wxChar **pNew = new wxChar *[nSize]; + if ( !pNew ) + return; + + memcpy(pNew, m_pItems, m_nCount*sizeof(wxChar *)); + delete [] m_pItems; + + m_pItems = pNew; m_nSize = nSize; } - - m_nCount = 0; } // minimizes the memory usage by freeing unused memory @@ -2377,19 +2437,7 @@ void wxArrayString::assign(const_iterator first, const_iterator last) #if wxUSE_THREADS // need a critical section to protect access to gs_compareFunction and // gs_sortAscending variables - static wxCriticalSection *gs_critsectStringSort = NULL; - - // call this before the value of the global sort vars is changed/after - // you're finished with them - #define START_SORT() wxASSERT( !gs_critsectStringSort ); \ - gs_critsectStringSort = new wxCriticalSection; \ - gs_critsectStringSort->Enter() - #define END_SORT() gs_critsectStringSort->Leave(); \ - delete gs_critsectStringSort; \ - gs_critsectStringSort = NULL -#else // !threads - #define START_SORT() - #define END_SORT() + static wxCriticalSection gs_critsectStringSort; #endif // wxUSE_THREADS // function to use for string comparaison @@ -2420,7 +2468,7 @@ wxStringCompareFunction(const void *first, const void *second) // sort array elements using passed comparaison function void wxArrayString::Sort(CompareFunction compareFunction) { - START_SORT(); + wxCRIT_SECT_LOCKER(lockCmpFunc, gs_critsectStringSort); wxASSERT( !gs_compareFunction ); // must have been reset to NULL gs_compareFunction = compareFunction; @@ -2429,8 +2477,6 @@ void wxArrayString::Sort(CompareFunction compareFunction) // reset it to NULL so that Sort(bool) will work the next time gs_compareFunction = NULL; - - END_SORT(); } extern "C"