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thechaingamer
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ada-git-code

Dataset card Data Studio Files
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Block_Offset
(FAT_File_Size (Current_Index * 32) / FS.Block_Size);
end if;
else
Block_Off := Natural
(FAT_File_Size (Current_Index * 32) mod FS.Block_Size);
-- Check if we're on a block boundare
if Unsigned_32 (Block_Off) = 0 and then Current_Index /= 0 then
Current_Block := Current_Block + 1;
end if;
-- Check if we're on the boundary of a new cluster
if Current_Block - FS.Cluster_To_Block (Current_Cluster)
= FS.Blocks_Per_Cluster
then
-- The block we need to read is outside of the current cluster.
-- Let's move on to the next
-- Read the FAT table to determine the next cluster
Current_Cluster := FS.Get_FAT (Current_Cluster);
if Current_Cluster = 1
or else FS.Is_Last_Cluster (Current_Cluster)
then
return Internal_Error;
end if;
Current_Block := FS.Cluster_To_Block (Current_Cluster);
end if;
end if;
Ret := FS.Ensure_Block (Current_Block);
if Ret /= OK then
return Ret;
end if;
if FS.Window (Block_Off) = 0 then
-- End of entries: we stick the index here to make sure that further
-- calls to Next_Entry always end-up here
return No_More_Entries;
end if;
DEntry := To_Entry (FS.Window (Block_Off .. Block_Off + 31));
Current_Index := Current_Index + 1;
return OK;
end Next_Entry;
----------------
-- Next_Entry --
----------------
function Next_Entry
(FS : access FAT_Filesystem;
Current_Cluster : in out Cluster_Type;
Current_Block : in out Block_Offset;
Current_Index : in out Entry_Index;
DEntry : out FAT_Node) return Status_Code
is
procedure Prepend
(Name : Wide_String;
Full : in out String;
Idx : in out Natural);
-- Prepends Name to Full
-------------
-- Prepend --
-------------
procedure Prepend
(Name : Wide_String;
Full : in out String;
Idx : in out Natural)
is
Val : Unsigned_16;
begin
for J in reverse Name'Range loop
Val := Wide_Character'Pos (Name (J));
if Val /= 16#FFFF#
and then Val /= 0
then
Idx := Idx - 1;
exit when Idx not in Full'Range;
if Val < 255 then
Full (Idx) := Character'Val (Val);
elsif Val = 16#F029# then
-- Path ends with a '.'
Full (Idx) := '.';
elsif Val = 16#F028# then
-- Path ends with a ' '
Full (Idx) := ' ';
else
Full (Idx) := '?';
end if;
end if;