Mega Code Archive
How to use some expanded Pos functions
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Title: How to use some expanded Pos-functions
function LastPos(SearchStr, Str: string): Integer;
var
i: Integer;
TempStr: string;
begin
Result := Pos(SearchStr, Str);
if Result = 0 then Exit;
if (Length(Str) 0) and (Length(SearchStr) 0) then
begin
for i := Length(Str) + Length(SearchStr) - 1 downto Result do
begin
TempStr := Copy(Str, i, Length(Str));
if Pos(SearchStr, TempStr) 0 then
begin
Result := i;
break;
end;
end;
end;
end;
// Search for the next occurence of a string from a certain Position
function NextPos(SearchStr, Str: string; Position: Integer): Integer;
begin
Delete(Str, 1, Position - 1);
Result := Pos(SearchStr, upperCase(Str));
if Result = 0 then Exit;
if (Length(Str) 0) and (Length(SearchStr) 0) then
Result := Result + Position + 1;
end;
// Get the number of characters from a certain Position to the string to be searched
function NextPosRel(SearchStr, Str: string; Position: Integer): Integer;
begin
Delete(Str, 1, Position - 1);
Result := Pos(SearchStr, UpperCase(Str)) - 1;
end;
// simple replacement for strings
function ReplaceStr(Str, SearchStr, ReplaceStr: string): string;
begin
while Pos(SearchStr, Str) 0 do
begin
Insert(ReplaceStr, Str, Pos(SearchStr, Str));
Delete(Str, Pos(SearchStr, Str), Length(SearchStr));
end;
Result := Str;
end;
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