Power-Programmierung/CD1.mdf/pascal/library/dos/strings/seabool/somebool.pas

Pascal/Delphi Source File | 1990-02-01 | 5.3 KB | 154 lines

program Somebool;{Demonstration only: run Somebool.exe}
USES SEABOOL, crt;

{*********************************************************************}
{sample for seabool.pas Turbo Pascal 5.5 search unit}
{calls: bool_init       any_bool}
{see the file seabool.doc for detailed PROGRAMMER instructions for seabool}



{THIS PROGRAM IS AN EXAMPLE OF THE SEABOOL IMPLEMENTATION.
IT IS BY NO MEANS AN EXHAUSTIVE DEMONSTRATION, AND MAKES NO
ATTEMPT TO PROVIDE THE USUAL AMENITIES OF USER EDITING KEYS
OR DESIGN. IT IS NOT MEANT TO BE A USER PRODUCT}

{THE USER IS ASKED TO TYPE IN A SENTENCE.}
{THE USER IS ASKED FOR A TEXT CONDITION}
{THE USER IS TOLD WHETHER HIS CONDITION IS FOUND IN THE ORIGINAL SENTENCE}
{OR THE USER IS TOLD THE CONDITION IS ILLOGICAL OR TOO COMPLICATED}
{OR THE USER IS TOLD THE CONDITION IS LOGICALLY ALWAYS FALSE}
{CRITICAL VARIABLES ARE DISCLOSED}
{**********************************************************}

var {for this demo only: seabool provides other variables. see manual file
       Seabool.doc for information or read the beginning of Seabool.pas
        UNIT source file}

  source_string:string;{what you are searching}
  target_string:string;{the text condition the user is looking for}
  interface_source_string:string;{search source
                            string for your search primitive}

  ch:char;{just used to read the keypress of the user in the demo}
  counter:letter_type{a seabool type variable};
  there_was_a_critical_one:boolean;{just used in this demo}
{THIS IS THE USER DEFINED SEARCH PRIMITIVE "you" write}
{NOT FAR CALL COMPILER OPTION!}
{$F+}
procedure my_search_procedure(var target:string;var valid:boolean);
      begin
        valid:= Pos(target,lowercase(interface_source_string))>0;
      end{procedure my_search...};
{$F-}



begin {MAIN DEMONSTRATION OF SEABOOL SEARCH CAPABILITY:}
  clrscr;
  {*************************}
  {MESSAGE}
  Writeln('This is a simple demonstration of Seabool Searcher');
  writeln
  ('It uses the identical unit provided with your programmers package');
  writeln;writeln('You type in any sentence of your choice,');
  writeln('then a text condition using');
  writeln('and or not operators.   parentheses allowed');
  writeln
  ('THE PROGRAM TELLS WHETHER YOUR CONDITION WAS PRESENT IN THE SENTENCE');
  writeln;Writeln('(press any key to continue, esc to exit)');
   ch:=readkey;if ch=#0 then ch:=readkey;
  if ch=#27 then halt;


  {*********************DEMO DEMO DEMO DEMO of seabool.pas unit********}
  REPEAT

  clrscr;
  Writeln('DEMONSTRATION OF THE SEABOOL UNIT');
  Writeln('PLEASE NOTE YOU don''t get any fancy editing keys!');
  Writeln;
  Write('Please enter any sentence (ENTER=exit)  ');
  Writeln('example: I want to phone up Mary tonight');
  Writeln;Writeln;
  Write('>');



  {EXAMPLE OF SEARCH SPACE:}
  Readln(source_string);
  IF source_string<>'' then
  BEGIN
     Writeln;

     {********************************}
     {GET BOOLEAN CONDITON FROM USER:}
     Write('Please type in a AND   OR NOT condition.        ');
     Writeln('example: phone and (mary or sue)');
     Writeln;Writeln;
     Write('>');
     Readln(target_string);
     Editstring(target_string);{Editstring is an tool of seabool}
     if ((target_string='') or (target_string='exit')) then halt;
     bool_init(target_string);




     {************************************}
     {NOW WE VALIDATE THIS target_string:}
         if bool_validation_sit=2 then
             Writeln('YOUR REQUEST IS TOO COMPLICATED OR NOT LOGICAL')
         else
         if bool_validation_sit=4 then
             Writeln('YOUR REQUEST WILL NEVER BE TRUE')
     ELSE {Valid user input}

        begin
     {******************}
     {******THE SEARCH:***********
     could be a loop for many source_strings or objects}

     interface_source_string:=source_string;
     if any_bool(my_search_procedure) then
        Writeln('THIS CONDITION IS TRUE IN YOUR SENTENCE')
     else
        Writeln('THIS CONDITION WAS NOT FOUND IN YOUR SENTENCE');
        end;

     {**********************************************************************}
     {DEMONSTRATION OF CRITICAL VARIABLE INFO}
     if ((bool_validation_sit<>2) and (bool_validation_sit<>4)) then
     begin
     There_was_a_critical_one:=false ;{default}
     for counter:='b' to  length_object_hash_table_0 do
          if bool_crit_true[counter] then
                there_was_a_critical_one:=true;
     if There_was_a_critical_one then
         begin
          writeln;
          writeln('By the way, I knew that you were looking for:');
          for counter:='b' to  length_object_hash_table_0 do
          if bool_crit_true[counter] then
                writeln(
                search_object_hash_table_0[counter]);
          Writeln('I could have checked those word(s) in my database INDEX!');
        end;
     end;{DEMO OF CRITICAL VARIABLE KNOWLEDGE}


     {*****************DEMO loop ENDING************}
     writeln(chr(7));
     Writeln;
     Writeln
     ('--------Please press any key to try it again, or Esc to END-------');
     ch:=readkey;if ch=#0 then ch:=readkey;if ch=#27 then
           source_string:='';
     {**********************************************************************}

  END;

  UNTIL source_string='';
end.