diff --git a/src/shared/utils.pas b/src/shared/utils.pas
index 1caa1f3338c12bb30327a45ac45a4abff404199b..c01287f2c53e5fd6f3503292ec25a3ad2a9403dd 100644 (file)
--- a/src/shared/utils.pas
+++ b/src/shared/utils.pas
function UpCase1251 (ch: Char): Char;
function LoCase1251 (ch: Char): Char;
+function toLowerCase1251 (const s: AnsiString): AnsiString;
+
// `true` if strings are equal; ignoring case for cp1251
function StrEquCI1251 (const s0, s1: AnsiString): Boolean;
end;
+function toLowerCase1251 (const s: AnsiString): AnsiString;
+var
+ f: Integer;
+ ch: AnsiChar;
+begin
+ for ch in s do
+ begin
+ if (ch <> LoCase1251(ch)) then
+ begin
+ result := '';
+ SetLength(result, Length(s));
+ for f := 1 to Length(s) do result[f] := LoCase1251(s[f]);
+ exit;
+ end;
+ end;
+ // nothing to do
+ result := s;
+end;
+
+
// ////////////////////////////////////////////////////////////////////////// //
// utils
// `ch`: utf8 start