X-Git-Url: http://deadsoftware.ru/gitweb?a=blobdiff_plain;f=src%2Fshared%2Futils.pas;h=bf8abf4fbc98a8d0ce8de1b687e6b35da9d63cd7;hb=469fea05c58ca92a5a18483751dde23f255ab52d;hp=0cedb13e86a64643fb396cfd646d5d589fb30ae9;hpb=414f2873efa0cce84499f64774db7000e6268971;p=d2df-sdl.git

diff --git a/src/shared/utils.pas b/src/shared/utils.pas
index 0cedb13..bf8abf4 100644
--- a/src/shared/utils.pas
+++ b/src/shared/utils.pas
@@ -26,6 +26,17 @@ type
   SSArray = array of ShortString;
 
 
+const wadExtensions: array [0..6] of AnsiString = (
+  '.dfz',
+  '.wad',
+  '.dfwad',
+  '.pk3',
+  '.pak',
+  '.zip',
+  '.dfzip'
+);
+
+
 // ////////////////////////////////////////////////////////////////////////// //
 type
   TUtf8DecoderFast = packed record
@@ -60,6 +71,12 @@ function getFilenameExt (const fn: AnsiString): AnsiString;
 function setFilenameExt (const fn, ext: AnsiString): AnsiString;
 function forceFilenameExt (const fn, ext: AnsiString): AnsiString;
 
+// rewrites slashes to '/'
+function fixSlashes (s: AnsiString): AnsiString;
+
+function isAbsolutePath (const s: AnsiString): Boolean;
+function isRootPath (const s: AnsiString): Boolean;
+
 // strips out name from `fn`, leaving trailing slash
 function getFilenamePath (const fn: AnsiString): AnsiString;
 
@@ -99,13 +116,18 @@ function utf8Valid (const s: AnsiString): Boolean;
 
 function utf8to1251 (s: AnsiString): AnsiString;
 
-// findFileCI eats case-insensitive path, traverses it and rewrites it to a
-// case-sensetive. result value means success.
-// if file/dir not founded than pathname is in undefined state!
+// findFileCI takes case-insensitive path, traverses it, and rewrites it to
+// a case-sensetive one (using real on-disk names). return value means 'success'.
+// if some dir or file wasn't found, pathname is undefined (destroyed, but not
+// necessarily cleared).
+// last name assumed to be a file, not directory (unless `lastIsDir` flag is set).
 function findFileCI (var pathname: AnsiString; lastIsDir: Boolean=false): Boolean;
 
-// findDiskWad tries to find wad file and rewrites extension if needed
-// result is new filename or empty string
+// findDiskWad tries to find the wad file using common wad extensions
+// (see `wadExtensions` array).
+// returns real on-disk filename, or empty string.
+// original wad extension is used as a hint for the first try.
+// also, this automatically performs `findFileCI()`.
 function findDiskWad (fname: AnsiString): AnsiString;
 // slashes must be normalized!
 function isWadNamesEqu (wna, wnb: AnsiString): Boolean;
@@ -113,7 +135,7 @@ function isWadNamesEqu (wna, wnb: AnsiString): Boolean;
 // they throws
 function openDiskFileRO (pathname: AnsiString): TStream;
 function createDiskFile (pathname: AnsiString): TStream;
-// creates file if necessary
+// create file if necessary, but don't truncate the existing one
 function openDiskFileRW (pathname: AnsiString): TStream;
 
 // little endian
@@ -300,17 +322,6 @@ 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;
 begin
@@ -328,6 +339,43 @@ begin
 end;
 
 
+// ////////////////////////////////////////////////////////////////////////// //
+// rewrites slashes to '/'
+function fixSlashes (s: AnsiString): AnsiString;
+var
+  f: Integer;
+begin
+  result := s;
+  for f := 1 to length(result) do if (result[f] = '\') then result[f] := '/';
+end;
+
+
+function isAbsolutePath (const s: AnsiString): Boolean;
+begin
+  result := false;
+  if (length(s) = 0) then exit;
+  {$IFDEF WINDOWS}
+  if (s[1] = '/') or (s[1] = '\') then begin result := true; exit; end;
+  if (length(s) > 2) and (s[2] = ':') and ((s[3] = '/') or (s[3] = '\')) then begin result := true; exit; end;
+  {$ELSE}
+  result := (s[1] = '/');
+  {$ENDIF}
+end;
+
+
+function isRootPath (const s: AnsiString): Boolean;
+begin
+  result := false;
+  if (length(s) = 0) then exit;
+  {$IFDEF WINDOWS}
+  if (s = '/') or (s = '\') then begin result := true; exit; end;
+  if (length(s) = 3) and (s[2] = ':') and ((s[3] = '/') or (s[3] = '\')) then begin result := true; exit; end;
+  {$ELSE}
+  result := (s = '/');
+  {$ENDIF}
+end;
+
+
 // ////////////////////////////////////////////////////////////////////////// //
 constructor TSimpleList.TEnumerator.Create (const aitems: TItemArr; acount: Integer);
 begin
@@ -880,7 +928,7 @@ end;
 function isWadPath (const fn: AnsiString): Boolean;
 var
   pos: Integer;
-  s: AnsiString;
+  s, wext: AnsiString;
 begin
   result := false;
   pos := 1;
@@ -892,10 +940,13 @@ begin
       if (pos-4 > 1) and (fn[pos-4] = '.') and ((fn[pos+1] = '\') or (fn[pos+1] = '/')) then
       begin
         s := Copy(fn, pos-4, 4);
-        if StrEquCI1251(s, '.wad') or StrEquCI1251(s, '.pk3') or StrEquCI1251(s, '.zip') or StrEquCI1251(s, '.dfz') then
+        for wext in wadExtensions do
         begin
-          result := true;
-          exit;
+          if strEquCI1251(s, wext) then
+          begin
+            result := true;
+            exit;
+          end;
         end;
       end;
     end;