X-Git-Url: http://www.lcore.org/git/lcore.git/blobdiff_plain/82d4e52fba54be50d719f6185ec381f2dc87fc6c..refs/heads/master:/fd_utils.pas

diff --git a/fd_utils.pas b/fd_utils.pas
old mode 100755
new mode 100644
index de89e5f..86b6d3a
--- a/fd_utils.pas
+++ b/fd_utils.pas
@@ -23,8 +23,13 @@
 unit fd_utils;
 interface
 
+const
+    FDwordshift=5;
+    FDwordmaxbit=(1 shl FDwordshift)-1;
+
 type
-    FDSet= Array [0..255] of longint; {31}
+    FDword=longint;
+    FDSet= Array [0..255] of fdword; {31}
     PFDSet= ^FDSet;
 
 Procedure FD_Clr(fd:longint;var fds:fdSet);
@@ -43,8 +48,8 @@ uses sysutils;
 Procedure FD_Clr(fd:longint;var fds:fdSet);{$ifdef useinline}inline;{$endif}
 { Remove fd from the set of filedescriptors}
 begin
-  if (fd < 0) then raise exception.create('FD_Clr fd out of range: '+inttostr(fd));
-  fds[fd shr 5]:=fds[fd shr 5] and (not (1 shl (fd and 31)));
+  if (fd < 0) or ((fd shr fdwordshift) > high(fdset)) then raise exception.create('FD_Clr fd out of range: '+inttostr(fd));
+  fds[fd shr fdwordshift]:=fds[fd shr fdwordshift] and (not (1 shl (fd and fdwordmaxbit)));
 end;
 
 Procedure FD_Zero(var fds:fdSet);
@@ -56,17 +61,17 @@ end;
 Procedure FD_Set(fd:longint;var fds:fdSet);{$ifdef useinline}inline;{$endif}
 { Add fd to the set of filedescriptors }
 begin
-  if (fd < 0) then raise exception.create('FD_set fd out of range: '+inttostr(fd));
-  fds[fd shr 5]:=fds[fd shr 5] or (1 shl (fd and 31));
+  if (fd < 0) or ((fd shr fdwordshift) > high(fdset)) then raise exception.create('FD_set fd out of range: '+inttostr(fd));
+  fds[fd shr fdwordshift]:=fds[fd shr fdwordshift] or (1 shl (fd and fdwordmaxbit));
 end;
 
 Function FD_IsSet(fd:longint;var fds:fdSet):boolean;{$ifdef useinline}inline;{$endif}
 { Test if fd is part of the set of filedescriptors }
 begin
-  if (fd < 0) then begin
+  if (fd < 0) or ((fd shr fdwordshift) > high(fdset)) then begin
     result := false;
     exit;
   end;
-  FD_IsSet:=((fds[fd shr 5] and (1 shl (fd and 31)))<>0);
+  FD_IsSet:=((fds[fd shr fdwordshift] and (1 shl (fd and fdwordmaxbit)))<>0);
 end;
 end.