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110 lines
2.0 KiB
ObjectPascal
110 lines
2.0 KiB
ObjectPascal
{$mode objfpc}
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{$H+}
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{
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This file is part of Free Pascal build tools
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Copyright (c) 2005 by Michael Van Canneyt
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Implements string substitutions
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See the file COPYING.FPC, included in this distribution,
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for details about the copyright.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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**********************************************************************}
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unit usubst;
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interface
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uses SysUtils,Classes;
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// Add N=V pair to list.
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Procedure AddToList(List : TStrings; Const N,V : String);
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// Split NV to N/V and call AddToList
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Function AddPair(List : TStrings; Const NV : String) : Boolean;
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// Perform substitutions in S, from List.
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Function DoSubStitutions(List : TStrings; Var S : String) : Integer;
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implementation
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Procedure AddToList(List : TStrings; Const N,V : String);
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var
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I : Integer;
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begin
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I:=List.IndexOfName(N);
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If (V='') then
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begin
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If (I<>-1) then
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List.Delete(I)
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end
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else
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begin
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If (I=-1) then
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List.Add(N+'='+V)
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else
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List[I]:=N+'='+V;
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end;
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end;
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Function AddPair(List : TStrings; Const NV : String) : Boolean;
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Var
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P,I : Integer;
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N,V : string;
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begin
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P:=Pos('=',NV);
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Result:=(P<>0);
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If Result then
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begin
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V:=NV;
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N:=Copy(V,1,P-1);
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Delete(V,1,P);
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AddToList(List,N,V);
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end;
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end;
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Function DoSubstitutions(List : TStrings; Var S : String) : Integer;
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Var
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N,T : String;
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P : Integer;
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begin
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Result:=0;
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T:=S;
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S:='';
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P:=Pos('%',T);
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While (P>0) do
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begin
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S:=S+Copy(T,1,P-1);
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Delete(T,1,P);
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If (Length(T)>0) then
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if (T[1]='%') then
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begin
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S:=S+'%';
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Delete(T,1,1);
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end
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else
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begin
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P:=Pos('%',T);
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If (P=0) then
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S:=S+'%'
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else
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begin
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N:=Copy(T,1,P-1);
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Delete(T,1,P);
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S:=S+List.Values[N];
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end;
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end;
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P:=Pos('%',T);
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end;
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S:=S+T;
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end;
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end.
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