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bug with checking the first character of possible empty string corrected

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git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@621 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
This commit is contained in:
Vadim Zeitlin 1998-08-22 20:34:00 +00:00
parent f57d793249
commit 1880e45211
1 changed files with 72 additions and 1 deletions
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73
src/msw/registry.cpp
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@ -759,7 +759,7 @@ bool wxRegKey::GetNextKey(wxString& strKeyName, long& lIndex) const
}
// ============================================================================
// implementation of global functions
// implementation of global private functions
// ============================================================================
bool KeyExists(HKEY hRootKey, const char *szKey)
{
@ -787,3 +787,74 @@ void RemoveTrailingSeparator(wxString& str)
if ( !str.IsEmpty() && str.Last() == REG_SEPARATOR )
str.Truncate(str.Len() - 1);
}
// ============================================================================
// global public functions
// ============================================================================
bool GetExtensionFromMimeType(wxString *pExt, const wxString& strMimeType)
{
// @@@ VZ: I don't know of any official documentation which mentions this
// location, but as a matter of fact IE uses it, so why not we?
static const char *szMimeDbase = "MIME\\Database\\Content Type\\";
wxString strKey = szMimeDbase;
strKey << strMimeType;
// suppress possible error messages
wxLogNull nolog;
wxRegKey key(wxRegKey::HKCR, strKey);
if ( key.IsOpened() ) {
if ( key.QueryValue("Extension", *pExt) )
return TRUE;
}
// no such MIME type or no extension for it
return FALSE;
}
bool GetMimeTypeFromExtension(wxString *pMimeType, const wxString& strExt)
{
wxCHECK( !strExt.IsEmpty(), FALSE );
// add the leading point if necessary
wxString str;
if ( strExt[0] != '.' ) {
str = '.';
}
str << strExt;
// suppress possible error messages
wxLogNull nolog;
wxRegKey key(wxRegKey::HKCR, str);
if ( key.IsOpened() ) {
if ( key.QueryValue("Content Type", *pMimeType) )
return TRUE;
}
// no such extension or no content-type
return FALSE;
}
bool GetFileTypeFromExtension(wxString *pFileType, const wxString& strExt)
{
wxCHECK( !strExt.IsEmpty(), FALSE );
// add the leading point if necessary
wxString str;
if ( strExt[0] != '.' ) {
str = '.';
}
str << strExt;
// suppress possible error messages
wxLogNull nolog;
wxRegKey key(wxRegKey::HKCR, str);
if ( key.IsOpened() ) {
if ( key.QueryValue("", *pFileType) ) // it's the default value of the key
return TRUE;
}
// no such extension or no value
return FALSE;
}