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%============================================================================
% C L E A N . P A S
%============================================================================
% A sample Turbo Pascal (3.0) program for truncating downloaded pixel files
% to the standard size assumed by some TeX-oriented programs (starting from
% a file of type: File of Array[0..511] of Byte.
Program Clean_Up(Output,Input,Font_List_File);
LABEL
Report;
TYPE
Name_Of_File =String[20];
Name_Of_Font =String[20];
Byte =0..255;
Byte_Block =Array[0..511] Of Byte;
Word =Array[0..3] Of Byte;
VAR
Font_List_File:Text;
Pxl_File:File of Byte_Block;
Block:Byte_Block;
Last_Blocks:Array[0..1023] Of Byte;
One_Word:Word;
File_Name,New_File_Name:Name_Of_File;
Font_Name:Name_Of_Font;
New_Pxl_File:File Of Word;
File_Id_Found,Bad_Pxl_File:Boolean;
End_Of_Block:Boolean;
IOR,Word_Pos:Integer;
Ch:Char;
Word_Value:Real;
PROCEDURE Banner;
Begin
Writeln('!==================================================!');
Writeln('! The files to be repaired are assumed consist of !');
Writeln('! blocks 512 bytes long. The repaired files consist!');
Writeln('! of words. The names of files are supposed to be !');
Writeln('! found from a separate file. !');
Writeln('!==================================================!');
End;
PROCEDURE Initialize;
Begin
File_Id_Found:=False;
Word_Pos:=0;
End_Of_Block:=False;
Bad_Pxl_File:=False;
End;
PROCEDURE Check_File_Id;
VAR
A:Integer;
Begin
If Abs(Word_Value)<2000.0 Then
Begin
A:=Round(Word_Value);
If (A=1001) Or (A=1002) Then File_Id_Found:=True;
End;
End;
PROCEDURE READ_NEXT_WORD;
VAR
I:Integer;
Begin
If Not End_Of_Block Then
Begin
For I:=0 To 3 Do One_Word[3-I]:=Last_Blocks[1023-((4*Word_Pos)+I)];
Word_Pos:=Word_Pos+1;
If Word_Pos>255 Then End_Of_Block:=True;
End;
End;
PROCEDURE EVALUATE_NEXT_WORD;
Begin
Read_Next_Word;
Word_Value:=One_Word[3]+256.0*(One_Word[2]+
256.0*(One_Word[1]+256.0*One_Word[0]));
End;
PROCEDURE Find_File_Id;
Var
K:Integer;
Begin
While (Not File_Id_Found) And (Not End_Of_Block) Do
Begin
Evaluate_Next_Word;
Check_File_Id;
End;
If Not File_Id_Found Then
Begin
For K:=Length(Font_Name) To 30 Do Write('.');
Writeln(' Bad Pxl File, File Not Repaired');
Bad_Pxl_File:=True;
End;
End;
PROCEDURE Rewrite_Pxl_File(Var Font_Name,File_Name:Name_Of_File);
LABEL
Report;
VAR
I,J,K,IOR:Integer;
Begin
Assign(Pxl_File,Font_Name);
{$I-} Reset(Pxl_File) {$I+};
IOR:=IOresult;
If IOR<>0 Then Goto Report;
Assign(New_Pxl_File,File_Name);
Rewrite(New_Pxl_File);
Seek(Pxl_File,0);
For I:=0 To Filesize(Pxl_File)-3 Do
Begin
Read(Pxl_File,Block);
For J:=0 To 127 Do
Begin
For K:=0 To 3 Do One_Word[K]:=Block[(4*J)+K];
Write(New_Pxl_File,One_Word);
End;
End;
Read(Pxl_File,Block);
For I:=0 To 511 Do
Last_Blocks[I]:=Block[I];
Read(Pxl_File,Block);
For I:=512 To 1023 Do
Last_Blocks[I]:=Block[I-512];
Find_File_ID;
Word_Pos:=255-Word_Pos;
If Not Bad_Pxl_File Then
Begin
For I:=0 To Word_Pos+1 Do
Begin
For K:=0 To 3 Do One_Word[K]:=Last_Blocks[(4*I)+K];
Write(New_Pxl_File,One_Word);
End;
Report:Begin
For I:=0 To 30-Length(Font_Name) Do Write('.');
If IOR<>0 Then Writeln('File Not Found') Else
Begin
Writeln(New_File_Name);
Close(New_Pxl_File);
Close(Pxl_File);
End;
End;
End;
End;
(*** M A I N P R O G R A M ***)
BEGIN
Banner;
Writeln;
Writeln('Give The Name Of File Containing The List Of Pxl Files: ');
Readln(File_Name);
Assign(Font_List_File,File_Name);
{$I-} Reset(Font_List_File) {$I+};
IOR:=IOresult;
If IOR<>0 Then Goto Report;
While Not Eof(Font_List_File) Do
Begin
Initialize;
Font_Name:='';
While Not Eoln(Font_List_File) Do
Begin
Read(Font_List_File,Ch);
Font_Name:=Font_Name+Ch;
End;
Readln(Font_List_File);
Write(Font_Name);
New_File_Name:=Copy(Font_Name,1,Pos('.',Font_Name)-1)+'.rxl';
Rewrite_Pxl_File(Font_Name,New_File_Name);
End;
Writeln;
Report: Begin
If IOR<>0 Then Writeln('File Not Found!') Else
Begin
Writeln('............Done!...........');
Close(Font_List_File);
End;
End;
END.
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