unit ID3Kernel;interfacetype
Tid3v1= record
Tag: array[0..2] of char; //00..02 , ='TAG'
Title:array[0..$1d] of char; //03..20
Artist:array[0..$1d] of char; //21..3e
Album:array[0..$1d] of char; //3f..5c
Year:array[0..3] of char; //5d..60
Comment:array[0..$1c] of char; //61..7d
Track:byte; //7e
Genre:byte; //7f
end;function ReadID3v1(strFile:string;var pid3v1:Tid3v1):integer;
function WriteID3v1(strFile:string;var pid3v1:Tid3v1):integer;
function DeleteID3v1(strFile:string):integer;implementationfunction ReadID3v1(strFile:string;var pid3v1:Tid3v1):integer;
var
f1:file of byte;
bytAll: array [0..$7f] of byte;
i: integer;
begin
result:=1;
if strFile='' then exit;
AssignFile(f1,strFile);
FileMode:=0;
Reset(f1);
if FileSize(f1)<=$80 then exit;
Seek(f1, FileSize(f1)-$80);
for i:=0 to $7f do Read(f1,bytAll[i]);
if (bytAll[0]<>ord('T')) and (bytAll[1]<>ord('A'))
and (bytAll[2]<>ord('G')) then exit; // no 'TAG' found
Move(bytAll,pid3v1,$80);
CloseFile(f1);
result:=0;
end;function WriteID3v1(strFile:string;var pid3v1:Tid3v1):integer;
var
f1:file of byte;
bytAll: array [0..$7f] of byte;
i: integer;
begin
result:=1;
AssignFile(f1,strFile);
FileMode:=2;
Reset(f1);
if FileSize(f1)<=$80 then exit;
Seek(f1, FileSize(f1)-$80);
for i:=0 to $2 do Read(f1,bytAll[i]); // test if 'TAG' exists
if (bytAll[0]=ord('T')) and (bytAll[1]=ord('A'))
and (bytAll[2]=ord('G'))
then Seek(f1,FileSize(f1)-$80)
else Seek(f1,FileSize(f1));
Move(pid3v1,bytAll,$80);
for i:=0 to $7f do Write(f1,bytAll[i]);
CloseFile(f1);
result:=0;
end;function DeleteID3v1(strFile:string):integer;
var
f1:file of byte;
bytAll: array [0..$7f] of byte;
i: integer;
begin
Result:=1;
AssignFile(f1,strFile);
FileMode:=2;
Reset(f1);
if FileSize(f1)<=$80 then exit;
Seek(f1, FileSize(f1)-$80);
for i:=0 to $2 do Read(f1,bytAll[i]); // test if 'TAG' exists
if (bytAll[0]=ord('T')) and (bytAll[1]=ord('A'))
and (bytAll[2]=ord('G'))
then begin
Seek(f1,FileSize(f1)-$80);
Truncate(f1)
end;
CloseFile(f1);
Result:=0;
end;end.
Tid3v1= record
Tag: array[0..2] of char; //00..02 , ='TAG'
Title:array[0..$1d] of char; //03..20
Artist:array[0..$1d] of char; //21..3e
Album:array[0..$1d] of char; //3f..5c
Year:array[0..3] of char; //5d..60
Comment:array[0..$1c] of char; //61..7d
Track:byte; //7e
Genre:byte; //7f
end;function ReadID3v1(strFile:string;var pid3v1:Tid3v1):integer;
function WriteID3v1(strFile:string;var pid3v1:Tid3v1):integer;
function DeleteID3v1(strFile:string):integer;implementationfunction ReadID3v1(strFile:string;var pid3v1:Tid3v1):integer;
var
f1:file of byte;
bytAll: array [0..$7f] of byte;
i: integer;
begin
result:=1;
if strFile='' then exit;
AssignFile(f1,strFile);
FileMode:=0;
Reset(f1);
if FileSize(f1)<=$80 then exit;
Seek(f1, FileSize(f1)-$80);
for i:=0 to $7f do Read(f1,bytAll[i]);
if (bytAll[0]<>ord('T')) and (bytAll[1]<>ord('A'))
and (bytAll[2]<>ord('G')) then exit; // no 'TAG' found
Move(bytAll,pid3v1,$80);
CloseFile(f1);
result:=0;
end;function WriteID3v1(strFile:string;var pid3v1:Tid3v1):integer;
var
f1:file of byte;
bytAll: array [0..$7f] of byte;
i: integer;
begin
result:=1;
AssignFile(f1,strFile);
FileMode:=2;
Reset(f1);
if FileSize(f1)<=$80 then exit;
Seek(f1, FileSize(f1)-$80);
for i:=0 to $2 do Read(f1,bytAll[i]); // test if 'TAG' exists
if (bytAll[0]=ord('T')) and (bytAll[1]=ord('A'))
and (bytAll[2]=ord('G'))
then Seek(f1,FileSize(f1)-$80)
else Seek(f1,FileSize(f1));
Move(pid3v1,bytAll,$80);
for i:=0 to $7f do Write(f1,bytAll[i]);
CloseFile(f1);
result:=0;
end;function DeleteID3v1(strFile:string):integer;
var
f1:file of byte;
bytAll: array [0..$7f] of byte;
i: integer;
begin
Result:=1;
AssignFile(f1,strFile);
FileMode:=2;
Reset(f1);
if FileSize(f1)<=$80 then exit;
Seek(f1, FileSize(f1)-$80);
for i:=0 to $2 do Read(f1,bytAll[i]); // test if 'TAG' exists
if (bytAll[0]=ord('T')) and (bytAll[1]=ord('A'))
and (bytAll[2]=ord('G'))
then begin
Seek(f1,FileSize(f1)-$80);
Truncate(f1)
end;
CloseFile(f1);
Result:=0;
end;end.
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