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added File.Get_Line and File.Put_Line. rewritten io procedures to reply on the current and the last position instead of the length

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hyung-hwan 2014-06-19 14:13:19 +00:00
parent b441709a02
commit 0286526bf1
3 changed files with 299 additions and 116 deletions
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9
cmd/scheme.adb
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@ -86,6 +86,7 @@ declare
Buffer: H2.Slim.String (1 .. 200); Buffer: H2.Slim.String (1 .. 200);
BufferW: H2.Wide.String (1 .. 27); BufferW: H2.Wide.String (1 .. 27);
IL, OL: H2.System_Length; IL, OL: H2.System_Length;
Option: File.Option_Record;
begin begin
--File.Open (F, H2.Slim.String'("/etc/passwd"), FL); --File.Open (F, H2.Slim.String'("/etc/passwd"), FL);
--File.Read (F, Buffer, Length); --File.Read (F, Buffer, Length);
@ -111,16 +112,18 @@ ada.text_io.put_line ("------------------");
File.Set_Flag_Bits (FL, File.FLAG_CREATE); File.Set_Flag_Bits (FL, File.FLAG_CREATE);
File.Set_Flag_Bits (FL, File.FLAG_TRUNCATE); File.Set_Flag_Bits (FL, File.FLAG_TRUNCATE);
File.Open (F2, H2.Wide.String'("/tmp/yyy"), FL); File.Open (F2, H2.Wide.String'("/tmp/yyy"), FL);
File.Set_Option_Bits (Option, File.Option_CRLF);
File.Set_Option (F2, Option);
loop loop
File.Get_Line (F, BufferW, IL); File.Get_Line (F, Buffer, IL);
ada.wide_text_io.put_line (standard.wide_string(bufferw(1..il))); --ada.wide_text_io.put_line (standard.wide_string(bufferw(1..il)));
--File.Read (F, BufferW, IL); --File.Read (F, BufferW, IL);
exit when IL <= 0; exit when IL <= 0;
File.Write_Line (F2, BufferW(BufferW'First .. BufferW'First + IL - 1), OL); File.Put_Line (F2, Buffer(Buffer'First .. Buffer'First + IL - 1), OL);
pragma Assert (IL = OL); pragma Assert (IL = OL);
--Ada.Text_IO.PUt (Standard.String(Buffer(Buffer'First .. Buffer'First + IL - 1))); --Ada.Text_IO.PUt (Standard.String(Buffer(Buffer'First .. Buffer'First + IL - 1)));

370
lib/h2-io-file.adb
View File

@ -18,13 +18,26 @@ package body File is
File.EOF := (Length <= 0); File.EOF := (Length <= 0);
end OS_Read_File; end OS_Read_File;
procedure Shift_Buffer (Buffer: in out File_Buffer; --procedure Shift_Buffer (Buffer: in out File_Buffer;
Length: in System_Length) is -- Length: in System_Length) is
pragma Inline (Shift_Buffer); -- pragma Inline (Shift_Buffer);
--begin
-- Buffer.Length := Buffer.Length - Length;
-- Buffer.Data(Buffer.Data'First .. Buffer.Data'First + Buffer.Length - 1) := Buffer.Data(Buffer.Data'First + Length .. Buffer.Data'First + Length + Buffer.Length - 1);
--end Shift_Buffer;
procedure Compact_Buffer (Buffer: in out File_Buffer) is
A, B, L: System_Length;
begin begin
Buffer.Length := Buffer.Length - Length; A := Buffer.Pos;
Buffer.Data(Buffer.Data'First .. Buffer.Data'First + Buffer.Length - 1) := Buffer.Data(Buffer.Data'First + Length .. Buffer.Data'First + Length + Buffer.Length - 1); B := Buffer.Last;
end Shift_Buffer; L := Buffer.Pos - Buffer.Data'First + 1;
Buffer.Pos := Buffer.Pos - L; -- should be same as Buffer.Data'First - 1
Buffer.Last := Buffer.Last - L;
Buffer.Data(Buffer.Pos + 1 .. Buffer.Last) := Buffer.Data(A + 1 .. B);
end Compact_Buffer;
procedure Copy_Array (Dst: in out System_Byte_Array; procedure Copy_Array (Dst: in out System_Byte_Array;
Src: in System_Byte_Array; Src: in System_Byte_Array;
@ -34,10 +47,36 @@ package body File is
Dst(Dst'First .. Dst'First + Length - 1) := Src(Src'First .. Src'First + Length - 1); Dst(Dst'First .. Dst'First + Length - 1) := Src(Src'First .. Src'First + Length - 1);
end Copy_Array; end Copy_Array;
function Is_Empty (Buf: in File_Buffer) return Standard.Boolean is
pragma Inline (Is_Empty);
begin
return Buf.Pos >= Buf.Last;
end Is_Empty;
procedure Set_Length (Buf: in out File_Buffer; Length: in System_Length) is
pragma Inline (Set_Length);
begin
Buf.Pos := Buf.Data'First - 1; -- this should be 0
Buf.Last := Buf.Pos + Length;
end Set_Length;
Slim_Line_Terminator: Slim_String := Get_Line_Terminator; Slim_Line_Terminator: Slim_String := Get_Line_Terminator;
--Wide_Line_Terminator: Wide_String := Get_Line_Terminator; --Wide_Line_Terminator: Wide_String := Get_Line_Terminator;
procedure Set_Option_Bits (Option: in out Option_Record;
Bits: in Option_Bits) is
begin
Option.Bits := Option.Bits or Bits;
end Set_Option_Bits;
procedure Clear_Option_Bits (Option: in out Option_Record;
Bits: in Option_Bits) is
begin
Option.Bits := Option.Bits and not Bits;
end Clear_Option_Bits;
--|----------------------------------------------------------------------- --|-----------------------------------------------------------------------
--| OPEN AND CLOSE --| OPEN AND CLOSE
--|----------------------------------------------------------------------- --|-----------------------------------------------------------------------
@ -53,11 +92,10 @@ package body File is
pragma Assert (not Is_Open(File)); pragma Assert (not Is_Open(File));
begin begin
OS.File.Open (File.File, Name, Flag, Pool => Pool); OS.File.Open (File.File, Name, Flag, Pool => Pool);
File.Rbuf.First := 0;
File.Rbuf.Last := 0;
File.Rbuf.Length := 0;
File.Wbuf.Length := 0; Set_Length (File.Rbuf, 0);
Set_Length (File.Wbuf, 0);
File.EOF := Standard.False; File.EOF := Standard.False;
--File.Slim_Line_Break := Get_Line_Terminator; --File.Slim_Line_Break := Get_Line_Terminator;
--File.Wide_Line_Break := Get_Line_Terminator; --File.Wide_Line_Break := Get_Line_Terminator;
@ -70,8 +108,10 @@ package body File is
pragma Assert (not Is_Open(File)); pragma Assert (not Is_Open(File));
begin begin
OS.File.Open (File.File, Name, Flag, Pool => Pool); OS.File.Open (File.File, Name, Flag, Pool => Pool);
File.Rbuf.Length := 0;
File.Wbuf.Length := 0; Set_Length (File.Rbuf, 0);
Set_Length (File.Wbuf, 0);
File.EOF := Standard.False; File.EOF := Standard.False;
--File.Slim_Line_Break := Get_Line_Terminator; --File.Slim_Line_Break := Get_Line_Terminator;
--File.Wide_Line_Break := Get_Line_Terminator; --File.Wide_Line_Break := Get_Line_Terminator;
@ -85,18 +125,15 @@ package body File is
File.File := null; File.File := null;
end Close; end Close;
function Is_Empty (Buf: in File_Buffer) return Standard.Boolean is procedure Set_Option (File: in out File_Record; Option: in Option_Record) is
pragma Inline (Is_Empty);
begin begin
return Buf.First >= Buf.Last; File.Option := Option;
end Is_Empty; end Set_Option;
procedure Set_Length (Buf: in out File_Buffer; Length: in System_Length) is function Get_Option (File: in File_Record) return Option_Record is
pragma Inline (Set_Length);
begin begin
Buf.First := Buf.Data'First - 1; -- this should be 0 return File.Option;
Buf.Last := Buf.First + Length; end Get_Option;
end Set_Length;
procedure Load_Bytes (File: in out File_Record) is procedure Load_Bytes (File: in out File_Record) is
pragma Assert (Is_Open(File)); pragma Assert (Is_Open(File));
@ -127,8 +164,8 @@ package body File is
else else
-- Consume 1 byte -- Consume 1 byte
Available := Standard.True; Available := Standard.True;
File.Rbuf.First := File.Rbuf.First + 1; File.Rbuf.Pos := File.Rbuf.Pos + 1;
Item := File.Rbuf.Data(File.Rbuf.First); Item := File.Rbuf.Data(File.Rbuf.Pos);
end if; end if;
end Fetch_Byte; end Fetch_Byte;
@ -142,7 +179,7 @@ package body File is
-- raise EOF EXCEPTION. ??? -- raise EOF EXCEPTION. ???
Length := 0; Length := 0;
else else
L1 := File.Rbuf.Last - File.Rbuf.First; L1 := File.Rbuf.Last - File.Rbuf.Pos;
if L1 > 0 then if L1 > 0 then
-- Copy the residue over to the output buffer -- Copy the residue over to the output buffer
if Item'Length <= L1 then if Item'Length <= L1 then
@ -151,8 +188,8 @@ package body File is
L2 := L1; L2 := L1;
end if; end if;
Copy_Array (Item, File.Rbuf.Data(File.Rbuf.First + 1 .. File.Rbuf.Last), L2); Copy_Array (Item, File.Rbuf.Data(File.Rbuf.Pos + 1 .. File.Rbuf.Last), L2);
File.Rbuf.First := File.Rbuf.First + L2; File.Rbuf.Pos := File.Rbuf.Pos + L2;
Length := L2; Length := L2;
else else
@ -161,7 +198,7 @@ package body File is
if Item'Length > L1 then if Item'Length > L1 then
-- Item is not full. the internal read buffer must be empty. -- Item is not full. the internal read buffer must be empty.
pragma Assert (File.Rbuf.First >= File.Rbuf.Last); pragma Assert (File.Rbuf.Pos >= File.Rbuf.Last);
L2 := Item'Length - Length; -- Remaining capacity L2 := Item'Length - Length; -- Remaining capacity
If L2 >= File.Rbuf.Data'Length then If L2 >= File.Rbuf.Data'Length then
@ -183,7 +220,7 @@ package body File is
-- Copy as many bytes as needed into the output buffer. -- Copy as many bytes as needed into the output buffer.
Copy_Array (Item(Item'First + Length .. Item'Last), File.Rbuf.Data, L2); Copy_Array (Item(Item'First + Length .. Item'Last), File.Rbuf.Data, L2);
Length := Length + L2; Length := Length + L2;
File.Rbuf.First := File.Rbuf.First + L2; File.Rbuf.Pos := File.Rbuf.Pos + L2;
end if; end if;
end if; end if;
end if; end if;
@ -223,10 +260,10 @@ package body File is
exit when Is_Empty(File.Rbuf); exit when Is_Empty(File.Rbuf);
end if; end if;
while File.Rbuf.First < File.Rbuf.Last loop while File.Rbuf.Pos < File.Rbuf.Last loop
K := K + 1; K := K + 1;
File.Rbuf.First := File.Rbuf.First + 1; File.Rbuf.Pos := File.Rbuf.Pos + 1;
Outbuf(K) := File.Rbuf.Data(File.Rbuf.First); Outbuf(K) := File.Rbuf.Data(File.Rbuf.Pos);
if K >= Outbuf'Last or else Outbuf(K) = Slim_Ascii.Pos.LF then -- TODO: different line terminator if K >= Outbuf'Last or else Outbuf(K) = Slim_Ascii.Pos.LF then -- TODO: different line terminator
exit outer; -- Done exit outer; -- Done
end if; end if;
@ -260,9 +297,9 @@ package body File is
end if; end if;
if not Is_Empty(File.Rbuf) then if not Is_Empty(File.Rbuf) then
if File.Rbuf.Data(File.Rbuf.First + 1) = Slim_Ascii.Pos.LF then if File.Rbuf.Data(File.Rbuf.Pos + 1) = Slim_Ascii.Pos.LF then
-- Consume LF held in the internal read buffer. -- Consume LF held in the internal read buffer.
File.Rbuf.First := File.Rbuf.First + 1; File.Rbuf.Pos := File.Rbuf.Pos + 1;
-- Switch CR to LF (End-result: CR/LF to LF) -- Switch CR to LF (End-result: CR/LF to LF)
Buffer(Last) := Slim_Ascii.LF; Buffer(Last) := Slim_Ascii.LF;
end if; end if;
@ -274,7 +311,6 @@ package body File is
--|----------------------------------------------------------------------- --|-----------------------------------------------------------------------
--| READ WIDE STRING --| READ WIDE STRING
--|----------------------------------------------------------------------- --|-----------------------------------------------------------------------
procedure Read_Wide (File: in out File_Record; procedure Read_Wide (File: in out File_Record;
Buffer: out Wide_String; Buffer: out Wide_String;
Length: out System_Length; Length: out System_Length;
@ -297,17 +333,17 @@ package body File is
exit when Is_Empty(File.Rbuf); exit when Is_Empty(File.Rbuf);
end if; end if;
while File.Rbuf.First < File.Rbuf.Last and K < Outbuf'Last loop while File.Rbuf.Pos < File.Rbuf.Last and K < Outbuf'Last loop
I := File.Rbuf.First + 1; I := File.Rbuf.Pos + 1;
L3 := Sequence_Length(Inbuf(I)); -- Required number of bytes to compose a wide character L3 := Sequence_Length(Inbuf(I)); -- Required number of bytes to compose a wide character
if L3 <= 0 then if L3 <= 0 then
-- Potentially illegal sequence -- Potentially illegal sequence
K := K + 1; K := K + 1;
Outbuf(K) := Wide_Ascii.Question; Outbuf(K) := Wide_Ascii.Question;
File.Rbuf.First := I; File.Rbuf.Pos := I;
else else
L4 := File.Rbuf.Last - File.Rbuf.First; -- Avaliable number of bytes available in the internal buffer L4 := File.Rbuf.Last - File.Rbuf.Pos; -- Avaliable number of bytes available in the internal buffer
if L4 < L3 then if L4 < L3 then
-- Insufficient data available. Exit the inner loop to read more. -- Insufficient data available. Exit the inner loop to read more.
exit; exit;
@ -315,14 +351,14 @@ package body File is
K := K + 1; K := K + 1;
begin begin
J := File.Rbuf.First + L3; J := File.Rbuf.Pos + L3;
Outbuf(K..K) := Slim_To_Wide(Inbuf(I .. J)); Outbuf(K..K) := Slim_To_Wide(Inbuf(I .. J));
exception exception
when others => when others =>
Outbuf(K) := Wide_Ascii.Question; Outbuf(K) := Wide_Ascii.Question;
J := I; -- Override J to skip 1 byte only. J := I; -- Override J to skip 1 byte only.
end; end;
File.Rbuf.First := J; File.Rbuf.Pos := J;
end if; end if;
if Terminator'Length > 0 and then if Terminator'Length > 0 and then
@ -385,10 +421,10 @@ package body File is
L3, I, J: System_Length; L3, I, J: System_Length;
W: Wide_String(1..1); W: Wide_String(1..1);
begin begin
I := File.Rbuf.First + 1; I := File.Rbuf.Pos + 1;
L3 := Sequence_Length(Inbuf(I)); -- Required number of bytes to compose a wide character L3 := Sequence_Length(Inbuf(I)); -- Required number of bytes to compose a wide character
if L3 in 1 .. File.Rbuf.Last - File.Rbuf.First then if L3 in 1 .. File.Rbuf.Last - File.Rbuf.Pos then
J := File.Rbuf.First + L3; J := File.Rbuf.Pos + L3;
begin begin
W := Slim_To_Wide(Inbuf(I .. J)); W := Slim_To_Wide(Inbuf(I .. J));
exception exception
@ -397,7 +433,7 @@ package body File is
end; end;
if W(1) = Wide_Ascii.LF then if W(1) = Wide_Ascii.LF then
-- Consume LF held in the internal read buffer. -- Consume LF held in the internal read buffer.
File.Rbuf.First := J; File.Rbuf.Pos := J;
-- Switch CR to LF (End-result: CR/LF to LF) -- Switch CR to LF (End-result: CR/LF to LF)
Buffer(Last) := Wide_Ascii.LF; Buffer(Last) := Wide_Ascii.LF;
end if; end if;
@ -416,8 +452,6 @@ package body File is
Length: out System_Length) is Length: out System_Length) is
pragma Assert (Is_Open(File)); pragma Assert (Is_Open(File));
Wbuf: File_Buffer renames File.Wbuf;
Inbuf: System_Byte_Array (Buffer'Range); Inbuf: System_Byte_Array (Buffer'Range);
for Inbuf'Address use Buffer'Address; for Inbuf'Address use Buffer'Address;
@ -427,16 +461,20 @@ package body File is
-- However, under a certain condition, it may not be able to -- However, under a certain condition, it may not be able to
-- process the input buffer in full. -- process the input buffer in full.
if Wbuf.Length > 0 then if not Is_Empty(File.Wbuf) then
-- Some residue data in the internal buffer. -- Some residue data in the internal buffer.
if Inbuf'Length <= Wbuf.Data'Length - Wbuf.Length then if Inbuf'Length <= File.Wbuf.Data'Last - File.Wbuf.Last then
-- Copy the input to the internal buffer to reduce OS calls -- Copy the input to the internal buffer to reduce OS calls
F := Wbuf.Data'First + Wbuf.Length - 1;
F := File.Wbuf.Last + 1;
L := F + Inbuf'Length - 1; L := F + Inbuf'Length - 1;
Wbuf.Data(F .. L) := Inbuf; File.Wbuf.Data(F .. L) := Inbuf;
File.Wbuf.Last := L;
Flush (File); Flush (File);
-- The resulting length is the length of input buffer given.
-- The residue in the internal write buffer is not counted.
Length := Inbuf'Length; Length := Inbuf'Length;
return; return;
end if; end if;
@ -448,7 +486,7 @@ package body File is
L := 0; L := 0;
while L < Inbuf'Length loop while L < Inbuf'Length loop
--begin --begin
OS.File.Write (File.File, Inbuf, F); OS.File.Write (File.File, Inbuf(Inbuf'First + L .. Inbuf'Last), F);
--exception --exception
-- when OS.Would_Block_Exception => -- when OS.Would_Block_Exception =>
-- -- Cannot write the input in full. -- -- Cannot write the input in full.
@ -469,48 +507,107 @@ package body File is
Length: out System_Length) is Length: out System_Length) is
pragma Assert (Is_Open(File)); pragma Assert (Is_Open(File));
Wbuf: File_Buffer renames File.Wbuf;
Inbuf: System_Byte_Array (Buffer'Range); Inbuf: System_Byte_Array (Buffer'Range);
for Inbuf'Address use Buffer'Address; for Inbuf'Address use Buffer'Address;
I, J, LF: System_Length; L, I, LF: System_Length;
begin begin
-- This procedure attempts to write the input up to the last line -- This procedure attempts to write the input up to the last line
-- terminator. It buffers the remaining input after the terminator. -- terminator. It buffers the remaining input after the terminator.
-- The input may not include any line terminators. -- The input may not include any line terminators.
LF := Wbuf.Data'First - 1; LF := File.Wbuf.Data'First - 1;
I := Inbuf'First - 1; I := Inbuf'First - 1;
while I < Inbuf'Last loop
I := I + 1;
J := Wbuf.Data'First + Wbuf.Length;
Wbuf.Data(J) := Inbuf(I);
Wbuf.Length := Wbuf.Length + 1;
if Wbuf.Data(J) = Slim_Ascii.Pos.LF then -- TODO: different line terminator
-- Remeber the index of the line terminator
LF := J;
end if;
if Wbuf.Length >= Wbuf.Data'Length then while I < Inbuf'Last loop
if File.Wbuf.Last >= File.Wbuf.Data'Last then
-- The internal write buffer is full. -- The internal write buffer is full.
Flush (File); Flush (File);
LF := Wbuf.Data'First - 1; LF := File.Wbuf.Data'First - 1;
end if;
I := I + 1;
File.Wbuf.Last := File.Wbuf.Last + 1;
File.Wbuf.Data(File.Wbuf.Last) := Inbuf(I);
if File.Wbuf.Data(File.Wbuf.Last) = Slim_Ascii.Pos.LF then -- TODO: different line terminator
-- Remeber the index of the line terminator
LF := File.Wbuf.Last;
end if; end if;
end loop; end loop;
-- The line terminator was found. Write up to the terminator. -- The line terminator was found. Write up to the terminator.
-- Keep the rest in the internal buffer. -- Keep the rest in the internal buffer.
while LF in Wbuf.Data'First .. Wbuf.Length loop if LF in File.Wbuf.Data'Range then
OS.File.Write (File.File, Wbuf.Data(Wbuf.Data'First .. LF), J); while File.Wbuf.Pos < LF loop
Shift_Buffer (Wbuf, J); OS.File.Write (File.File, File.Wbuf.Data(File.Wbuf.Pos + 1 .. LF), L);
LF := LF - J; File.Wbuf.Pos := File.Wbuf.Pos + L;
end loop; end loop;
end if;
if File.Wbuf.Pos >= File.Wbuf.Data'First then
Compact_Buffer (File.Wbuf);
end if;
Length := I - Inbuf'First + 1; Length := I - Inbuf'First + 1;
end Write_Line; end Write_Line;
procedure Put_Line (File: in out File_Record;
Buffer: in Slim_String;
Length: out System_Length) is
pragma Assert (Is_Open(File));
Inbuf: System_Byte_Array (Buffer'Range);
for Inbuf'Address use Buffer'Address;
L, I, LF: System_Length;
X: System_Byte;
Injected: Standard.Boolean := Standard.False;
begin
LF := File.Wbuf.Data'First - 1;
I := Inbuf'First - 1;
while I < Inbuf'Last loop
if (File.Option.Bits and OPTION_CRLF) /= 0 and then
not Injected and then Inbuf(I + 1) = Slim_Ascii.Pos.LF then
X := Slim_Ascii.Pos.CR;
Injected := Standard.True;
else
I := I + 1;
X := Inbuf(I);
Injected := Standard.False;
end if;
if File.Wbuf.Last >= File.Wbuf.Data'Last then
-- The internal write buffer is full.
Flush (File);
LF := File.Wbuf.Data'First - 1;
end if;
File.Wbuf.Last := File.Wbuf.Last + 1;
File.Wbuf.Data(File.Wbuf.Last) := X;
if File.Wbuf.Data(File.Wbuf.Last) = Slim_Ascii.Pos.LF then -- TODO: different line terminator
-- Remeber the index of the line terminator
LF := File.Wbuf.Last;
end if;
end loop;
-- The line terminator was found. Write up to the terminator.
-- Keep the rest in the internal buffer.
if LF in File.Wbuf.Data'Range then
while File.Wbuf.Pos < LF loop
OS.File.Write (File.File, File.Wbuf.Data(File.Wbuf.Pos + 1 .. LF), L);
File.Wbuf.Pos := File.Wbuf.Pos + L;
end loop;
end if;
if File.Wbuf.Pos >= File.Wbuf.Data'First then
Compact_Buffer (File.Wbuf);
end if;
Length := I - Inbuf'First + 1;
end Put_Line;
--|----------------------------------------------------------------------- --|-----------------------------------------------------------------------
--| WRITE WIDE STRING --| WRITE WIDE STRING
--|----------------------------------------------------------------------- --|-----------------------------------------------------------------------
@ -519,8 +616,7 @@ package body File is
Length: out System_Length) is Length: out System_Length) is
pragma Assert (Is_Open(File)); pragma Assert (Is_Open(File));
Wbuf: File_Buffer renames File.Wbuf; L, I: System_Length;
F, L, I: System_Length;
begin begin
I := Buffer'First - 1; I := Buffer'First - 1;
while I < Buffer'Last loop while I < Buffer'Last loop
@ -530,20 +626,18 @@ package body File is
Tmp2: System_Byte_Array(Tmp'Range); Tmp2: System_Byte_Array(Tmp'Range);
for Tmp2'Address use Tmp'Address; for Tmp2'Address use Tmp'Address;
begin begin
F := Wbuf.Data'First + Wbuf.Length; L := File.Wbuf.Last + Tmp2'Length;
L := F + Tmp2'Length - 1;
if L > Wbuf.Data'Last then if L > File.Wbuf.Data'Last then
-- The multi-byte sequence for the current character -- The multi-byte sequence for the current character
-- can't fit into the internal buffer. Flush the -- can't fit into the internal buffer. Flush the
-- buffer and attempt to fit it in. -- buffer and attempt to fit it in.
Flush (File); Flush (File);
F := Wbuf.Data'First; L := File.Wbuf.Pos + Tmp2'Length;
L := F + Tmp2'Length - 1;
end if; end if;
Wbuf.Data(F..L) := Tmp2; File.Wbuf.Data(File.Wbuf.Last + 1 .. L) := Tmp2;
Wbuf.Length := Wbuf.Length + Tmp2'Length; File.Wbuf.Last := L;
end; end;
end loop; end loop;
@ -556,56 +650,115 @@ package body File is
Length: out System_Length) is Length: out System_Length) is
pragma Assert (Is_Open(File)); pragma Assert (Is_Open(File));
Wbuf: File_Buffer renames File.Wbuf; L, I, LF: System_Length;
F, L, I, LF: System_Length;
begin begin
LF := Wbuf.Data'First - 1;
LF := File.Wbuf.Data'First - 1;
I := Buffer'First - 1; I := Buffer'First - 1;
while I < Buffer'Last loop while I < Buffer'Last loop
I := I + 1; I := I + 1;
--if Buffer(I) = Wide_Ascii.LF then
--else
--end if;
declare declare
Tmp: Slim_String := Wide_To_Slim(Buffer(I..I)); Tmp: Slim_String := Wide_To_Slim(Buffer(I..I));
Tmp2: System_Byte_Array(Tmp'Range); Tmp2: System_Byte_Array(Tmp'Range);
for Tmp2'Address use Tmp'Address; for Tmp2'Address use Tmp'Address;
begin begin
F := Wbuf.Data'First + Wbuf.Length; L := File.Wbuf.Last + Tmp2'Length;
L := F + Tmp2'Length - 1;
if L > Wbuf.Data'Last then if L > File.Wbuf.Data'Last then
-- The multi-byte sequence for the current character -- The multi-byte sequence for the current character
-- can't fit into the internal buffer. Flush the -- can't fit into the internal buffer. Flush the
-- buffer and attempt to fit it in. -- buffer and attempt to fit it in.
Flush (File); Flush (File);
F := Wbuf.Data'First;
L := F + Tmp2'Length - 1;
LF := Wbuf.Data'First - 1;
end if;
Wbuf.Data(F..L) := Tmp2; L := File.Wbuf.Pos + Tmp2'Length;
Wbuf.Length := Wbuf.Length + Tmp2'Length; LF := File.Wbuf.Data'First - 1;
end if;
if Buffer(I) = Wide_Ascii.LF then -- TODO: different line terminator if Buffer(I) = Wide_Ascii.LF then -- TODO: different line terminator
LF := L; LF := L;
end if; end if;
File.Wbuf.Data(File.Wbuf.Last + 1 .. L) := Tmp2;
File.Wbuf.Last := L;
end; end;
end loop; end loop;
-- The line terminator was found. Write up to the terminator. if LF in File.Wbuf.Data'Range then
-- Keep the rest in the internal buffer. while File.Wbuf.Pos < LF loop
while LF in Wbuf.Data'First .. Wbuf.Length loop OS.File.Write (File.File, File.Wbuf.Data(File.Wbuf.Pos + 1 .. LF), L);
OS.File.Write (File.File, Wbuf.Data(Wbuf.Data'First .. LF), L); File.Wbuf.Pos := File.Wbuf.Pos + L;
Shift_Buffer (Wbuf, L);
LF := LF - L;
end loop; end loop;
end if;
if File.Wbuf.Pos >= File.Wbuf.Data'First then
Compact_Buffer (File.Wbuf);
end if;
Length := I - Buffer'First + 1; Length := I - Buffer'First + 1;
end Write_Line; end Write_Line;
procedure Put_Line (File: in out File_Record;
Buffer: in Wide_String;
Length: out System_Length) is
pragma Assert (Is_Open(File));
F, L, I, LF: System_Length;
X: Wide_String(1..2) := (Wide_Ascii.CR, Wide_Ascii.LF);
begin
LF := File.Wbuf.Data'First - 1;
I := Buffer'First - 1;
while I < Buffer'Last loop
I := I + 1;
X(2) := Buffer(I);
if (File.Option.Bits and OPTION_CRLF) /= 0 and then
Buffer(I) = Wide_Ascii.LF then
F := 1;
else
F := 2;
end if;
declare
Tmp: Slim_String := Wide_To_Slim(X(F..2));
Tmp2: System_Byte_Array(Tmp'Range);
for Tmp2'Address use Tmp'Address;
begin
L := File.Wbuf.Last + Tmp2'Length;
if L > File.Wbuf.Data'Last then
-- The multi-byte sequence for the current character
-- can't fit into the internal buffer. Flush the
-- buffer and attempt to fit it in.
Flush (File);
L := File.Wbuf.Pos + Tmp2'Length;
LF := File.Wbuf.Data'First - 1;
end if;
if Buffer(I) = Wide_Ascii.LF then
LF := L;
end if;
File.Wbuf.Data(File.Wbuf.Last + 1 .. L) := Tmp2;
File.Wbuf.Last := L;
end;
end loop;
if LF in File.Wbuf.Data'Range then
while File.Wbuf.Pos < LF loop
OS.File.Write (File.File, File.Wbuf.Data(File.Wbuf.Pos + 1 .. LF), L);
File.Wbuf.Pos := File.Wbuf.Pos + L;
end loop;
end if;
if File.Wbuf.Pos >= File.Wbuf.Data'First then
Compact_Buffer (File.Wbuf);
end if;
Length := I - Buffer'First + 1;
end Put_Line;
--|----------------------------------------------------------------------- --|-----------------------------------------------------------------------
--| FLUSH AND DRAIN --| FLUSH AND DRAIN
@ -613,12 +766,11 @@ package body File is
procedure Flush (File: in out File_Record) is procedure Flush (File: in out File_Record) is
pragma Assert (Is_Open(File)); pragma Assert (Is_Open(File));
Wbuf: File_Buffer renames File.Wbuf; L: System_Length;
Length: System_Length;
begin begin
while Wbuf.Length > 0 loop while not Is_Empty(File.Wbuf) loop
--begin --begin
OS.File.Write (File.File, Wbuf.Data(Wbuf.Data'First .. Wbuf.Length), Length); OS.File.Write (File.File, File.Wbuf.Data(File.Wbuf.Pos + 1 .. File.Wbuf.Last), L);
--exception --exception
-- when Would_Block_Exception => -- when Would_Block_Exception =>
-- -- Flush must write all it can. -- -- Flush must write all it can.
@ -626,14 +778,16 @@ package body File is
-- when others => -- when others =>
-- raise; -- raise;
--end; --end;
Shift_Buffer (Wbuf, Length); File.Wbuf.Pos := File.Wbuf.Pos + L;
end loop; end loop;
Set_Length (File.Wbuf, 0);
end Flush; end Flush;
procedure Drain (File: in out File_Record) is procedure Drain (File: in out File_Record) is
pragma Assert (Is_Open(File)); pragma Assert (Is_Open(File));
begin begin
File.Wbuf.Length := 0; Set_Length (File.Wbuf, 0);
end Drain; end Drain;
end File; end File;

32
lib/h2-io.ads
View File

@ -34,6 +34,14 @@ package H2.IO is
FLAG_SYNC: constant Flag_Bits := OS.File.FLAG_SYNC; FLAG_SYNC: constant Flag_Bits := OS.File.FLAG_SYNC;
FLAG_NOFOLLOW: constant Flag_Bits := OS.File.FLAG_NOFOLLOW; FLAG_NOFOLLOW: constant Flag_Bits := OS.File.FLAG_NOFOLLOW;
type Option_Bits is new System_Word;
type Option_Record is record
Bits: Option_Bits := 0;
end record;
-- Convert LF to CR/LF in Put_Line
OPTION_CRLF: constant Option_Bits := 2#0000_0000_0000_0001#;
type File_Buffer is private; type File_Buffer is private;
type File_Record is limited private; type File_Record is limited private;
@ -43,6 +51,12 @@ package H2.IO is
procedure Clear_Flag_Bits (Flag: in out Flag_Record; procedure Clear_Flag_Bits (Flag: in out Flag_Record;
Bits: in Flag_Bits) renames OS.File.Clear_Flag_Bits; Bits: in Flag_Bits) renames OS.File.Clear_Flag_Bits;
procedure Set_Option_Bits (Option: in out Option_Record;
Bits: in Option_Bits);
procedure Clear_Option_Bits (Option: in out Option_Record;
Bits: in Option_Bits);
function Is_Open (File: in File_Record) return Standard.Boolean; function Is_Open (File: in File_Record) return Standard.Boolean;
pragma Inline (Is_Open); pragma Inline (Is_Open);
@ -56,9 +70,12 @@ package H2.IO is
Flag: in Flag_Record; Flag: in Flag_Record;
Pool: in Storage_Pool_Pointer := null); Pool: in Storage_Pool_Pointer := null);
procedure Close (File: in out File_Record); procedure Close (File: in out File_Record);
procedure Set_Option (File: in out File_Record; Option: in Option_Record);
function Get_Option (File: in File_Record) return Option_Record;
-- The Read procedure reads as many characters as the buffer -- The Read procedure reads as many characters as the buffer
-- can hold with a single system call at most. -- can hold with a single system call at most.
procedure Read (File: in out File_Record; procedure Read (File: in out File_Record;
@ -102,6 +119,11 @@ package H2.IO is
Buffer: in Slim_String; Buffer: in Slim_String;
Length: out System_Length); Length: out System_Length);
procedure Put_Line (File: in out File_Record;
Buffer: in Slim_String;
Length: out System_Length);
procedure Write (File: in out File_Record; procedure Write (File: in out File_Record;
Buffer: in Wide_String; Buffer: in Wide_String;
Length: out System_Length); Length: out System_Length);
@ -110,6 +132,10 @@ package H2.IO is
Buffer: in Wide_String; Buffer: in Wide_String;
Length: out System_Length); Length: out System_Length);
procedure Put_Line (File: in out File_Record;
Buffer: in Wide_String;
Length: out System_Length);
procedure Flush (File: in out File_Record); procedure Flush (File: in out File_Record);
procedure Drain (File: in out File_Record); procedure Drain (File: in out File_Record);
@ -123,8 +149,7 @@ package H2.IO is
-- The Data array size must be as large as the longest -- The Data array size must be as large as the longest
-- multi-byte sequence for a single wide character. -- multi-byte sequence for a single wide character.
Data: System_Byte_Array (1 .. 2048); Data: System_Byte_Array (1 .. 2048);
Length: System_Length := 0; Pos: System_Length := 0;
First: System_Length := 0;
Last: System_Length := 0; Last: System_Length := 0;
end record; end record;
@ -133,6 +158,7 @@ package H2.IO is
Rbuf: File_Buffer; Rbuf: File_Buffer;
Wbuf: File_Buffer; Wbuf: File_Buffer;
EOF: Standard.Boolean := false; EOF: Standard.Boolean := false;
Option: Option_Record;
end record; end record;
end File; end File;