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thechaingamer
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ada-git-code

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Dico_Name => Dico_Name,
File_Name => File_Name,
File_Index => File_Index,
Comp_Size => Comp_Size,
Uncomp_Size => Uncomp_Size,
Crc_32 => Crc_32,
Date_Time => Date_Time,
Method => Method,
Name_Encoding => Name_Encoding,
Read_Only => Read_Only,
Encrypted_2_X => Encrypted_2_X));
elsif Dico_Name > Node.Dico_Name then
Insert_Into_Tree (Node.Right);
elsif Dico_Name < Node.Dico_Name then
Insert_Into_Tree (Node.Left);
else
-- Here we have a case where the entry name already exists
-- in the dictionary
raise Duplicate_Name with
"Entry name '" & Dico_Name & "' appears twice in archive";
end if;
end Insert_Into_Tree;
begin
Insert_Into_Tree (Root_Node);
end Insert;
The_End : Zip.Headers.End_Of_Central_Dir;
Header : Zip.Headers.Central_File_Header;
P : P_Dir_Node := null;
Main_Comment : P_String;
begin
if Info.Loaded then
raise Program_Error;
end if;
Zip.Headers.Load (From, The_End);
-- We take the opportunity to read the main comment, which is right
-- after the end-of-central-directory block
Main_Comment := new String (1 .. Integer (The_End.Main_Comment_Length));
String'Read (From'Access, Main_Comment.all);
-- Process central directory
From.Set_Index
(DCF.Streams.Zs_Index_Type (1 + The_End.Central_Dir_Offset) + The_End.Offset_Shifting);
for I in 1 .. The_End.Total_Entries loop
Zip.Headers.Read_And_Check (From, Header);
declare
This_Name : String (1 .. Natural (Header.Short_Info.Filename_Length));
begin
String'Read (From'Access, This_Name);
-- Skip extra field and entry comment
From.Set_Index
(From.Index +
DCF.Streams.Zs_Size_Type
(Header.Short_Info.Extra_Field_Length + Header.Comment_Length));
-- Now the whole i_th central directory entry is behind
Insert
(Dico_Name => Normalize (This_Name, Case_Sensitive),
File_Name => Normalize (This_Name, True),
File_Index =>
DCF.Streams.Zs_Index_Type (1 + Header.Local_Header_Offset) +
The_End.Offset_Shifting,
Comp_Size => Header.Short_Info.Dd.Compressed_Size,
Uncomp_Size => Header.Short_Info.Dd.Uncompressed_Size,
Crc_32 => Header.Short_Info.Dd.Crc_32,
Date_Time => Header.Short_Info.File_Timedate,
Method => Method_From_Code (Header.Short_Info.Zip_Type),
Name_Encoding =>
Boolean_To_Encoding
((Header.Short_Info.Bit_Flag and Zip.Headers.Language_Encoding_Flag_Bit) /= 0),
Read_Only =>
Header.Made_By_Version / 256 = 0 and -- DOS-like
(Header.External_Attributes and 1) = 1,
Encrypted_2_X =>
(Header.Short_Info.Bit_Flag and Zip.Headers.Encryption_Flag_Bit) /= 0,
Root_Node => P);
-- Since the files are usually well ordered, the tree as inserted
-- is very unbalanced; we need to rebalance it from time to time
-- during loading, otherwise the insertion slows down dramatically
-- for zip files with plenty of files - converges to
-- O(total_entries ** 2)...
if I mod 256 = 0 then
Binary_Tree_Rebalancing.Rebalance (P);
end if;
Function Definition: procedure Init_Buffers;
Function Body: function Read_Byte_Decrypted return Unsigned_8; -- NB: reading goes on a while even if
pragma Inline (Read_Byte_Decrypted); -- Zip_EOF is set: just gives garbage
package Bit_Buffer is
procedure Init;
-- Read at least n bits into the bit buffer, returns the n first bits
function Read (N : Natural) return Integer;
pragma Inline (Read);
function Read_U32 (N : Natural) return Unsigned_32;
pragma Inline (Read_U32);
-- Dump n bits no longer needed from the bit buffer
procedure Dump (N : Natural);