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Handle invalid conversion slightly better, ecapsulate literal chars with wxT

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git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@30159 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
This commit is contained in:
Ryan Norton 2004-10-29 08:55:58 +00:00
parent 6632a38a9b
commit 930357bd25
1 changed files with 25 additions and 8 deletions
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33
src/common/string.cpp
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@ -1011,14 +1011,15 @@ inline size_t wxMbstr(char* szBuffer, const wchar_t* szString,
//Get the length of the current (sub)string
size_t nLen = conv.WC2MB(NULL, szPos, 0);
wxASSERT(nLen != (size_t)-1); //should not be true! If it is system wctomb could be bad
// wxASSERT(nLen != (size_t)-1); //should not be true! If it is system wctomb could be bad
nActualLength += nLen + 1;
wxASSERT(nActualLength <= (nStringLen<<1) + 1); //If this is true it means buffer overflow
//Convert the current (sub)string
if ( conv.WC2MB(&szBuffer[szPos - szStart], szPos, nLen + 1) == (size_t)-1 )
if ( nLen == (size_t)-1 ||
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"));
@ -1057,14 +1058,15 @@ inline size_t wxWcstr( wchar_t* szBuffer, const char* szString,
//Get the length of the current (sub)string
size_t nLen = conv.MB2WC(NULL, szPos, 0);
wxASSERT(nLen != (size_t)-1); //should not be true! If it is system mbtowc could be bad
// wxASSERT(nLen != (size_t)-1); //If true, conversion was invalid, or system mbtowc could be bad
nActualLength += nLen + 1;
wxASSERT(nActualLength <= nStringLen + 1); //If this is true it means buffer overflow
//Convert the current (sub)string
if ( conv.MB2WC(&szBuffer[szPos - szStart], szPos, nLen + 1) == (size_t)-1 )
if ( nLen == (size_t)-1 ||
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"));
@ -1133,14 +1135,29 @@ wxString::wxString(const char *psz, wxMBConv& conv, size_t nLength)
internalBuffer.SetLength(
wxWcstr(internalBuffer, psz, nLen, conv)
);
/*
wxWCharBuffer buffer(nLen + 1);
//Convert the string
size_t nActualLength = wxWcstr(buffer.data(), psz, nLen, conv);
if ( !Alloc(nActualLength + 1) )
{
wxFAIL_MSG(wxT("Out of memory in wxString"));
}
else
{
//Copy the data
assign(buffer.data(), nActualLength);
}
*/
}
}
//Convert wxString in Unicode mode to a multi-byte string
const wxCharBuffer wxString::mb_str(wxMBConv& conv) const
{
//*2 is the worst case - probably for UTF8
wxCharBuffer buffer((length() << 1) + 1);
//*4 is the worst case - for UTF8
wxCharBuffer buffer((length() << 2) + 1);
//Do the actual conversion (will return a blank string on error)
wxMbstr(buffer.data(), (*this).c_str(), length(), conv);
@ -1473,7 +1490,7 @@ const wxCharBuffer wxString::ToAscii() const
const wchar_t *pwc = c_str();
for ( ;; )
{
*dest++ = *pwc > SCHAR_MAX ? '_' : *pwc;
*dest++ = *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
@ -1695,7 +1712,7 @@ bool wxString::IsNumber() const
{
const wxChar *s = (const wxChar*) *this;
if (wxStrlen(s))
if ((s[0] == '-') || (s[0] == '+')) s++;
if ((s[0] == wxT('-')) || (s[0] == wxT('+'))) s++;
while(*s){
if(!wxIsdigit(*s)) return(false);
s++;