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unit io;
interface
uses windows;
function Reset (fname:PWideChar):THANDLE; overload;
function Reset (fname:PAnsiChar):THANDLE; overload;
function ReWrite(fname:PWideChar):THANDLE; overload;
function ReWrite(fname:PAnsiChar):THANDLE; overload;
function Append (fname:PWideChar):THANDLE; overload;
function Append (fname:PAnsiChar):THANDLE; overload;
function GetFSize(name:PWideChar):dword; overload;
function GetFSize(name:PAnsiChar):dword; overload;
function FileExists(fname:PAnsiChar):Boolean; overload;
function FileExists(fname:PWideChar):Boolean; overload;
function Skip(f:THANDLE;count:integer):integer;
function Seek(f:THANDLE;pos:integer):integer;
function FilePos(f:THANDLE):dword;
function FileSize(f:THANDLE):dword;
function Eof(f:THANDLE):boolean;
function BlockRead (f:THANDLE;var buf;size:integer):dword;
function BlockWrite(f:THANDLE;var buf;size:integer):dword;
function ForceDirectories(path:PAnsiChar):boolean; overload;
function ForceDirectories(path:PWideChar):boolean; overload;
function DirectoryExists(Directory:PAnsiChar):Boolean; overload;
function DirectoryExists(Directory:PWideChar):Boolean; overload;
implementation
function Reset(fname:PWideChar):THANDLE;
begin
result:=CreateFileW(fname,GENERIC_READ,FILE_SHARE_READ+FILE_SHARE_WRITE,nil,OPEN_EXISTING,0,0);
end;
function Reset(fname:PAnsiChar):THANDLE;
begin
result:=CreateFileA(fname,GENERIC_READ,FILE_SHARE_READ+FILE_SHARE_WRITE,nil,OPEN_EXISTING,0,0);
end;
function Append(fname:PWideChar):THANDLE;
begin
result:=CreateFileW(fname,GENERIC_WRITE,FILE_SHARE_READ,nil,OPEN_ALWAYS,0,0);
SetFilePointer(result,0,nil,FILE_END);
end;
function Append(fname:PAnsiChar):THANDLE;
begin
result:=CreateFileA(fname,GENERIC_WRITE,FILE_SHARE_READ,nil,OPEN_ALWAYS,0,0);
SetFilePointer(result,0,nil,FILE_END);
end;
function ReWrite(fname:PWideChar):THANDLE; overload;
begin
result:=CreateFileW(fname,GENERIC_WRITE,FILE_SHARE_READ,nil,CREATE_ALWAYS,0,0);
end;
function ReWrite(fname:PAnsiChar):THANDLE; overload;
begin
result:=CreateFileA(fname,GENERIC_WRITE,FILE_SHARE_READ,nil,CREATE_ALWAYS,0,0);
end;
function Skip(f:THANDLE;count:integer):integer;
begin
result:=SetFilePointer(f,count,nil,FILE_CURRENT);
end;
function Eof(f:THANDLE):boolean;
begin
result:=FilePos(f)>=FileSize(f);
end;
function Seek(f:THANDLE;pos:integer):integer;
begin
result:=SetFilePointer(f,pos,nil,FILE_BEGIN);
end;
function FilePos(f:THANDLE):dword;
begin
result:=SetFilePointer(f,0,nil,FILE_CURRENT);
end;
function FileSize(f:THANDLE):dword;
begin
result:=GetFileSize(f,nil);
end;
function BlockRead(f:THANDLE;var buf;size:integer):dword;
begin
ReadFile(f,buf,size,result,nil);
end;
function BlockWrite(f:THANDLE;var buf;size:integer):dword;
begin
WriteFile(f,buf,size,result,nil);
end;
function GetFSize(name:PWideChar):dword;
var
lRec:WIN32_FIND_DATAW;
h:THANDLE;
begin
h:=FindFirstFileW(name,lRec);
if h=THANDLE(INVALID_HANDLE_VALUE) then
result:=0
else
begin
result:=lRec.nFileSizeLow;
FindClose(h);
end;
end;
function GetFSize(name:PAnsiChar):dword;
var
lRec:TWin32FindDataA;
h:THANDLE;
begin
h:=FindFirstFileA(name,lRec);
if h=THANDLE(INVALID_HANDLE_VALUE) then
result:=0
else
begin
result:=lRec.nFileSizeLow;
FindClose(h);
end;
end;
function ForceDirectories(path:PAnsiChar):boolean;
var
p,pc:PAnsiChar;
i:cardinal;
c:AnsiChar;
begin
result:=true;
if DirectoryExists(path) then exit;
if (path<>nil) and (path^<>#0) then
begin
i:=lstrlena(path)+1;
GetMem(pc,i);
move(path^,pc^,i);
p:=pc;
if (p^ in ['A'..'Z','a'..'z']) and (p[1]=':') then inc(p,2);
if p^ in ['/','\'] then inc(p);
c:=#0;
while p^<>#0 do
begin
c:=' ';
if (p^ in ['/','\']) and (p[1]<>#0) then
begin
c:=p^;
p^:=#0;
if not CreateDirectoryA(pc,nil) then
begin
if GetLastError<>ERROR_ALREADY_EXISTS then
begin
result:=false;
FreeMem(pc);
exit;
end;
end;
p^:=c;
end;
inc(p);
end;
if (c<>#0) and (c=' ') then
if not CreateDirectoryA(pc,nil) then
result:=false;
FreeMem(pc);
end;
end;
function ForceDirectories(path:PWideChar):boolean;
var
p,pc:PWideChar;
i:cardinal;
c:WideChar;
begin
result:=true;
if DirectoryExists(path) then exit;
if (path<>nil) and (path^<>#0) then
begin
i:=(lstrlenw(path)+1)*SizeOf(WideChar);
GetMem(pc,i);
move(path^,pc^,i);
p:=pc;
if (((p^>='A') and (p^<='Z')) or ((p^>='a') and (p^<='z'))) and (p[1]=':') then inc(p,2);
if (p^='/') or (p^='\') then inc(p);
c:=#0;
while p^<>#0 do
begin
c:=' ';
if ((p^='/') or (p^='\')) and (p[1]<>#0) then
begin
c:=p^;
p^:=#0;
if not CreateDirectoryW(pc,nil) then
if GetLastError<>ERROR_ALREADY_EXISTS then
begin
result:=false;
FreeMem(pc);
exit;
end;
p^:=c;
end;
inc(p);
end;
if (c<>#0) and (c=' ') then
if not CreateDirectoryW(pc,nil) then
result:=false;
FreeMem(pc);
end;
end;
function DirectoryExists(Directory:PAnsiChar):Boolean;
var
Code: Integer;
begin
Code := GetFileAttributesA(Directory);
Result := (Code<>-1) and ((Code and FILE_ATTRIBUTE_DIRECTORY)<>0);
end;
function DirectoryExists(Directory:PWideChar):Boolean;
var
Code: Integer;
begin
Code := GetFileAttributesW(Directory);
Result := (Code<>-1) and ((Code and FILE_ATTRIBUTE_DIRECTORY)<>0);
end;
function FileExists(fname:PAnsiChar):Boolean;
var
Code: Integer;
begin
Code := GetFileAttributesA(fname);
Result := (Code<>-1) and ((Code and FILE_ATTRIBUTE_DIRECTORY)=0);
end;
function FileExists(fname:PWideChar):Boolean;
var
Code: Integer;
begin
Code := GetFileAttributesW(fname);
Result := (Code<>-1) and ((Code and FILE_ATTRIBUTE_DIRECTORY)=0);
end;
end.
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