utils: added `GetDiskFileInfo()` function

[d2df-sdl.git] / src / shared / utils.pas

diff --git a/src/shared/utils.pas b/src/shared/utils.pas
index 215e60a8115bfb5373da9329867f78804a001139..867f0dcbef1befffb33b7d3a66cc40b57eeb360e 100644 (file)
--- a/src/shared/utils.pas
+++ b/src/shared/utils.pas
@@ -18,7 +18,7 @@ unit utils;
 interface
 
 uses
-  SysUtils, Classes;
+  SysUtils, Classes, md5;
 
 
 // ////////////////////////////////////////////////////////////////////////// //
@@ -277,11 +277,36 @@ procedure CopyMemory (Dest: Pointer; Src: Pointer; Len: LongWord); inline;
 procedure ZeroMemory (Dest: Pointer; Len: LongWord); inline;
 
 
+type
+  TDiskFileInfo = record
+    diskName: AnsiString;
+    size: LongInt;
+    age: LongInt;
+    // not changed by info getter; used in other parts of the code
+    userName: AnsiString;
+    tag: Integer;
+    hash: TMD5Digest;
+    udata: Pointer;
+  end;
+
+function GetDiskFileInfo (fname: AnsiString; var info: TDiskFileInfo): Boolean;
+
+
 implementation
 
 uses
   xstreams;
 
+const wadExtensions: array [0..6] of AnsiString = (
+  '.dfz',
+  '.wad',
+  '.dfwad',
+  '.pk3',
+  '.pak',
+  '.zip',
+  '.dfzip'
+);
+
 
 // ////////////////////////////////////////////////////////////////////////// //
 procedure CopyMemory (Dest: Pointer; Src: Pointer; Len: LongWord); inline;
@@ -816,10 +841,13 @@ end;
 
 function hasWadExtension (const fn: AnsiString): Boolean;
 var
-  ext: AnsiString;
+  ext, newExt: AnsiString;
 begin
   ext := getFilenameExt(fn);
-  result := StrEquCI1251(ext, '.wad') or StrEquCI1251(ext, '.pk3') or StrEquCI1251(ext, '.zip') or StrEquCI1251(ext, '.dfz');
+  result := true;
+  for newExt in wadExtensions do if (StrEquCI1251(ext, newExt)) then exit;
+  result := false;
+  //result := StrEquCI1251(ext, '.wad') or StrEquCI1251(ext, '.pk3') or StrEquCI1251(ext, '.zip') or StrEquCI1251(ext, '.dfz');
 end;
 
 
@@ -829,6 +857,7 @@ begin
   if not hasWadExtension(result) then result := result+'.wad';
 end;
 
+
 function isWadData (data: Pointer; len: LongWord): Boolean;
   var p: PChar;
 begin
@@ -1150,8 +1179,6 @@ begin
 end;
 
 
-const fileExtensions: array [0..6] of AnsiString = ('.dfz', '.wad', '.dfwad', '.pk3', '.pak', '.zip', '.dfzip');
-
 function isWadNamesEqu (wna, wnb: AnsiString): Boolean;
 var
   ext, newExt: AnsiString;
@@ -1162,12 +1189,12 @@ begin
   // check first ext
   ext := getFilenameExt(wna);
   found := false;
-  for newExt in fileExtensions do if (StrEquCI1251(ext, newExt)) then begin found := true; break; end;
+  for newExt in wadExtensions do if (StrEquCI1251(ext, newExt)) then begin found := true; break; end;
   if not found then exit;
   // check second ext
   ext := getFilenameExt(wnb);
   found := false;
-  for newExt in fileExtensions do if (StrEquCI1251(ext, newExt)) then begin found := true; break; end;
+  for newExt in wadExtensions do if (StrEquCI1251(ext, newExt)) then begin found := true; break; end;
   if not found then exit;
   wna := forceFilenameExt(wna, '');
   wnb := forceFilenameExt(wnb, '');
@@ -1185,7 +1212,7 @@ begin
   origExt := getFilenameExt(fname);
   fname := forceFilenameExt(fname, '');
   //writeln(' findDiskWad01: fname=<', fname, '>; origExt=<', origExt, '>');
-  for newExt in fileExtensions do
+  for newExt in wadExtensions do
   begin
     //writeln(' findDiskWad02: fname=<', fname, '>; origExt=<', origExt, '>; newExt=<', newExt, '>');
     if (StrEquCI1251(newExt, origExt)) then
@@ -1985,6 +2012,32 @@ begin
 end;
 
 
+function GetDiskFileInfo (fname: AnsiString; var info: TDiskFileInfo): Boolean;
+var
+  age: LongInt;
+  size: LongInt;
+  handle: THandle;
+begin
+  result := false;
+  if (length(fname) = 0) then exit;
+  if not findFileCI(fname) then exit;
+  // get age
+  age := FileAge(fname);
+  if (age = -1) then exit;
+  // get size
+  handle := FileOpen(fname, fmOpenRead or fmShareDenyNone);
+  if (handle = THandle(-1)) then exit;
+  size := FileSeek(handle, 0, fsFromEnd);
+  FileClose(handle);
+  if (size = -1) then exit;
+  // fill info
+  info.diskName := fname;
+  info.size := size;
+  info.age := age;
+  result := true;
+end;
+
+
 (*
 var
   ss: ShortString;