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POHow convert null-terminated string to an AnsiString?
 

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  1. POHow convert null-terminated string to an AnsiString?
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    <p>I have some code that compiles fine with D7 but fails with D2010. Obviously it is an Unicode issue:</p> <p>The compile error is: E2251 Ambiguous overloaded call to 'StrPas'</p> <p>Here is the whole procedure:</p> <pre><code>procedure GetVersionInfo; type PLangCharSetInfo = ^TLangCharSetInfo; TLangCharSetInfo = record Lang: Word; CharSet: Word; end; var FileName: array [0..260] of Char; SubBlock: array [0..255] of Char; VerHandle: Cardinal; Size: Word; Buffer: Pointer; Data: Pointer; DataLen: LongWord; LangCharSetInfo: PLangCharSetInfo; LangCharSetString: string; begin LabelComments.Caption := 'No version information for this program is available!'; {Get size and allocate buffer for VerInfo} if GetModuleFileName(hInstance, FileName, SizeOf(FileName)) &gt; 0 then begin Size := GetFileVersionInfoSize(FileName, VerHandle); if Size &gt; 0 then begin GetMem(Buffer, Size); try if GetFileVersionInfo(FileName, VerHandle, Size, Buffer) then begin {Query first language and that language blocks version info} if VerQueryValue(Buffer, '\VarFileInfo\Translation', Pointer(LangCharSetInfo), DataLen) then begin LangCharSetString := IntToHex(LangCharSetInfo^.Lang, 4) + IntToHex(LangCharSetInfo^.CharSet, 4); if VerQueryValue(Buffer, StrPCopy(SubBlock, '\StringFileInfo\' + LangCharSetString + '\ProductName'), Data, DataLen) then begin LabelProductName.Caption := StrPas(Data); Caption := LabelProductName.Caption; end; if VerQueryValue(Buffer, StrPCopy(SubBlock, '\StringFileInfo\' + LangCharSetString + '\FileVersion'), Data, DataLen) then LabelVersion.Caption := StrPas(Data); if VerQueryValue(Buffer, StrPCopy(SubBlock, '\StringFileInfo\' + LangCharSetString + '\LegalCopyright'), Data, DataLen) then LabelCopyright.Caption := StrPas(Data); if VerQueryValue(Buffer, StrPCopy(SubBlock, '\StringFileInfo\' + LangCharSetString + '\Comments'), Data, DataLen) then LabelComments.Caption := StrPas(Data); end; end; finally FreeMem(Buffer, Size); end; end end; end; </code></pre> <p>The doc for StrPas says</p> <pre><code>function StrPas(const Str: PAnsiChar): AnsiString; overload; </code></pre> <p>This function is provided fasor backwards compatibility only. To convert a null-terminated string to an AnsiString or native Delphi language string, use a typecast or an signment. </p> <p>So the question is should I remove all calls to StrPas ? The only way I make this to compile is to do a hardcast to PAnsi char like:</p> <pre><code>LabelProductName.Caption := StrPas(PAnsiChar(Data)); </code></pre>
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