From 4547093c9fcc350c3e5ab52e3f01dfa569524baf Mon Sep 17 00:00:00 2001
From: Erich Eckner <git@eckner.net>
Date: Mon, 30 May 2016 12:08:52 +0200
Subject: mystringlistunit.pas beschleunigt durch Aufbauen neuer Listen
 anstelle modifizieren vorhandener (grep, replace, uniq)

---
 mystringlistunit.pas | 63 +++++++++++++++++++++++++++++++++++++++-------------
 1 file changed, 47 insertions(+), 16 deletions(-)

diff --git a/mystringlistunit.pas b/mystringlistunit.pas
index a98e452..7d63462 100644
--- a/mystringlistunit.pas
+++ b/mystringlistunit.pas
@@ -190,15 +190,25 @@ end;
 
 procedure tMyStringlist.grep(expr: string; invert: boolean);
 var
+  tl: tMyStringList;
   re: tRegExpr;
   i:  longint;
 begin
   re:=tRegExpr.create;
   re.expression:=expr;
-  for i:=count-1 downto 0 do
-    if not invert xor re.exec(self[i]) then
-      delete(i);
+  re.compile;
+
+  tl:=tMyStringList.create;
+
+  for i:=0 to count-1 do
+    if invert xor re.exec(self[i]) then
+      tl.add(self[i]);
   re.free;
+
+  clear;
+  for i:=0 to tl.count-1 do
+    add(tl[i]);
+  tl.free;
 end;
 
 function tMyStringlist.grepFirst(expr: string): string;
@@ -220,40 +230,61 @@ end;
 
 procedure tMyStringlist.replace(von,nach: string);
 var
+  tl: tMyStringList;
   re: tRegExpr;
   i:  longint;
 begin
+  tl:=tMyStringList.create;
   re:=tRegExpr.create;
   re.expression:=von;
+  re.compile;
   for i:=0 to count-1 do
-    self[i]:=re.replace(self[i],nach,true);
+    tl.add(re.replace(self[i],nach,true));
+
+  clear;
+  for i:=0 to tl.count-1 do
+    add(tl[i]);
+  tl.free;
 end;
 
 procedure tMyStringlist.uniq(c: char);
 var
   i:   longint;
+  tl:  tMyStringList;
   dup: boolean;
 begin
+  tl:=tMyStringList.create;
   case c of
-    '-': // only keep one line for each group
-      for i:=count-1 downto 1 do
-        if self[i]=self[i-1] then
-          delete(i);
+    '-': begin // only keep one line for each group
+      i:=0;
+      while i<count do begin
+        while (i<count-1) and (self[i]=self[i+1]) do
+          inc(i);
+        tl.add(self[i]);
+        inc(i);
+      end;
+    end;
     'd': begin // only keep duplicate lines, one for each group
-      dup:=false;
-      for i:=count-1 downto 0 do begin
-        if (i>0) and (self[i]=self[i-1]) then begin
+      i:=0;
+      while i<count do begin
+        dup:=false;
+        while (i<count-1) and (self[i]=self[i+1]) do begin
           dup:=true;
-          delete(i);
-          continue;
+          inc(i);
         end;
-        if not dup then
-          delete(i);
-        dup:=false;
+        if dup then
+          tl.add(self[i]);
+        inc(i);
       end;
     end;
     else fehler('Unbekannte Option '''+c+''' für tMyStringList.uniq!');
   end{of case};
+
+  clear;
+  for i:=0 to tl.count-1 do
+    add(tl[i]);
+
+  tl.free;
 end;
 
 procedure tMyStringlist.append(sl: tMyStringList);
-- 
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