+// common conversion routines
+// ---------------------------------------------------------------------------
+
+size_t wxString::WorstEncodingCase(size_t len, const wxMBConv& WXUNUSED(conv))
+{
+ //Worst case for UTF7
+ return len * 5;
+}
+
+#if wxUSE_WCHAR_T
+
+//Convert a wide character string of a specified length
+//to a multi-byte character string, ignoring intermittent null characters
+//returns the actual length of the string
+inline size_t wxMbstr(char* szBuffer, const wchar_t* szString,
+ size_t nStringLen, wxMBConv& conv)
+{
+ const wchar_t* szEnd = szString + nStringLen + 1;
+ const wchar_t* szPos = szString;
+ const wchar_t* szStart = szPos;
+
+ size_t nActualLength = 0;
+
+ //Convert the string until the length() is reached, continuing the
+ //loop every time a null character is reached
+ while(szPos != szEnd)
+ {
+ wxASSERT(szPos < szEnd); //something is _really_ screwed up if this rings true
+
+ //Get the length of the current (sub)string
+ size_t nLen = conv.WC2MB(NULL, szPos, 0);
+
+ //Invalid conversion?
+ if( nLen == (size_t)-1 )
+ {
+ szBuffer[0] = '\0';
+ return 0;
+ }
+
+ //Increase the actual length (+1 for current null character)
+ nActualLength += nLen + 1;
+
+ //If this is true it means buffer overflow
+ wxASSERT( nActualLength <= wxString::WorstEncodingCase(nStringLen, conv) + 1 );
+
+ //Convert the current (sub)string
+ if(conv.WC2MB(&szBuffer[szPos - szStart], szPos, nLen + 1) == (size_t)-1 )
+ {
+ //error - return empty buffer
+ wxFAIL_MSG(wxT("Error converting wide-character string to a multi-byte string"));
+ szBuffer[0] = '\0';
+ return 0;
+ }
+
+ //Increment to next (sub)string
+ //Note that we have to use wxWcslen here instead of nLen
+ //here because XX2XX gives us the size of the output buffer,
+ //not neccessarly the length of the string
+ szPos += wxWcslen(szPos) + 1;
+ }
+
+ return nActualLength - 1; //success - return actual length
+}
+
+//Convert a multi-byte character string of a specified length
+//to a wide character string, ignoring intermittent null characters
+//returns the actual length
+inline size_t wxWcstr( wchar_t* szBuffer, const char* szString,
+ size_t nStringLen, wxMBConv& conv)
+{
+ const char* szEnd = szString + nStringLen + 1;
+ const char* szPos = szString;
+ const char* szStart = szPos;
+
+ size_t nActualLength = 0;
+
+ //Convert the string until the length() is reached, continuing the
+ //loop every time a null character is reached
+ while(szPos != szEnd)
+ {
+ wxASSERT(szPos < szEnd); //something is _really_ screwed up if this rings true
+
+ //Get the length of the current (sub)string
+ size_t nLen = conv.MB2WC(NULL, szPos, 0);
+
+ //Invalid conversion?
+ if( nLen == (size_t)-1 )
+ {
+ szBuffer[0] = '\0';
+ return 0;
+ }
+
+ //Increase the actual length (+1 for current null character)
+ nActualLength += nLen + 1;
+
+ //If this is true it means buffer overflow
+ wxASSERT(nActualLength <= nStringLen + 1);
+
+ //Convert the current (sub)string
+ if ( conv.MB2WC(&szBuffer[szPos - szStart], szPos, nLen + 1) == (size_t)-1 )
+ {
+ //error - return empty buffer
+ wxFAIL_MSG(wxT("Error converting multi-byte string to a wide-character string"));
+ szBuffer[0] = '\0';
+ return 0;
+ }
+
+ //Increment to next (sub)string
+ //Note that we have to use strlen here instead of nLen
+ //here because XX2XX gives us the size of the output buffer,
+ //not neccessarly the length of the string
+ szPos += strlen(szPos) + 1;
+ }
+
+ return nActualLength - 1; //success - return actual length
+}
+
+#endif //wxUSE_WCHAR_T
+
+// ---------------------------------------------------------------------------
+// construction and conversion
projects / wxWidgets.git / blobdiff