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* fixed fpc_WideStr_Concat in case when strings the same.

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git-svn-id: trunk@5964 -
This commit is contained in:
yury 2007-01-14 01:20:16 +00:00
parent 36ea8ec683
commit 4f5c8cfe1f
1 changed files with 6 additions and 1 deletions
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7
rtl/inc/wstrings.inc
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@ -454,6 +454,7 @@ end;
procedure fpc_WideStr_Concat (var DestS:Widestring;const S1,S2 : WideString); compilerproc;
Var
Size,Location : SizeInt;
same : boolean;
begin
{ only assign if s1 or s2 is empty }
if (S1='') then
@ -471,8 +472,12 @@ begin
{ Use Pointer() typecasts to prevent extra conversion code }
if Pointer(DestS)=Pointer(S1) then
begin
same:=Pointer(S1)=Pointer(S2);
SetLength(DestS,Size+Location);
Move(Pointer(S2)^,(Pointer(DestS)+Location*sizeof(WideChar))^,(Size+1)*sizeof(WideChar));
if same then
Move(Pointer(DestS)^,(Pointer(DestS)+Location*sizeof(WideChar))^,(Size)*sizeof(WideChar))
else
Move(Pointer(S2)^,(Pointer(DestS)+Location*sizeof(WideChar))^,(Size+1)*sizeof(WideChar));
end
else if Pointer(DestS)=Pointer(S2) then
begin