Save_Output : File_Descriptor;
Save_Error : File_Descriptor;
+ Expect_Process_Died : constant Expect_Match := -100;
+ Expect_Internal_Error : constant Expect_Match := -101;
+ -- Additional possible outputs of Expect_Internal. These are not visible in
+ -- the spec because the user will never see them.
+
procedure Expect_Internal
(Descriptors : in out Array_Of_Pd;
Result : out Expect_Match;
Full_Buffer : Boolean);
-- Internal function used to read from the process Descriptor.
--
- -- Three outputs are possible:
+ -- Several outputs are possible:
-- Result=Expect_Timeout, if no output was available before the timeout
-- expired.
-- Result=Expect_Full_Buffer, if Full_Buffer is True and some characters
-- had to be discarded from the internal buffer of Descriptor.
+ -- Result=Express_Process_Died if one of the processes was terminated.
+ -- That process's Input_Fd is set to Invalid_FD
+ -- Result=Express_Internal_Error
-- Result=<integer>, indicates how many characters were added to the
-- internal buffer. These characters are from indexes
-- Descriptor.Buffer_Index - Result + 1 .. Descriptor.Buffer_Index
Status : out Integer)
is
begin
- Close (Descriptor.Input_Fd);
+ if Descriptor.Input_Fd /= Invalid_FD then
+ Close (Descriptor.Input_Fd);
+ end if;
if Descriptor.Error_Fd /= Descriptor.Output_Fd then
Close (Descriptor.Error_Fd);
Expect_Internal (Descriptors, N, Timeout_Tmp, Full_Buffer);
- if N = Expect_Timeout or else N = Expect_Full_Buffer then
- Result := N;
- return;
- end if;
+ case N is
+ when Expect_Internal_Error | Expect_Process_Died =>
+ raise Process_Died;
+
+ when Expect_Timeout | Expect_Full_Buffer =>
+ Result := N;
+ return;
+
+ when others =>
+ null; -- See below
+ end case;
-- Calculate the timeout for the next turn
Expect_Internal (Descriptors, N, Timeout, Full_Buffer);
- if N = Expect_Timeout or else N = Expect_Full_Buffer then
- Result := N;
- return;
- end if;
+ case N is
+ when Expect_Internal_Error | Expect_Process_Died =>
+ raise Process_Died;
+
+ when Expect_Timeout | Expect_Full_Buffer =>
+ Result := N;
+ return;
+
+ when others =>
+ null; -- Continue
+ end case;
end loop;
end Expect;
for J in Descriptors'Range loop
Descriptors (J) := Regexps (J).Descriptor;
- Reinitialize_Buffer (Regexps (J).Descriptor.all);
+ if Descriptors (J) /= null then
+ Reinitialize_Buffer (Regexps (J).Descriptor.all);
+ end if;
end loop;
loop
-- checking the regexps).
for J in Regexps'Range loop
- Match (Regexps (J).Regexp.all,
- Regexps (J).Descriptor.Buffer
- (1 .. Regexps (J).Descriptor.Buffer_Index),
- Matched);
-
- if Matched (0) /= No_Match then
- Result := Expect_Match (J);
- Regexps (J).Descriptor.Last_Match_Start := Matched (0).First;
- Regexps (J).Descriptor.Last_Match_End := Matched (0).Last;
- return;
+ if Regexps (J).Regexp /= null
+ and then Regexps (J).Descriptor /= null
+ then
+ Match (Regexps (J).Regexp.all,
+ Regexps (J).Descriptor.Buffer
+ (1 .. Regexps (J).Descriptor.Buffer_Index),
+ Matched);
+
+ if Matched (0) /= No_Match then
+ Result := Expect_Match (J);
+ Regexps (J).Descriptor.Last_Match_Start := Matched (0).First;
+ Regexps (J).Descriptor.Last_Match_End := Matched (0).Last;
+ return;
+ end if;
end if;
end loop;
Expect_Internal (Descriptors, N, Timeout, Full_Buffer);
- if N = Expect_Timeout or else N = Expect_Full_Buffer then
- Result := N;
- return;
- end if;
+ case N is
+ when Expect_Internal_Error | Expect_Process_Died =>
+ raise Process_Died;
+
+ when Expect_Timeout | Expect_Full_Buffer =>
+ Result := N;
+ return;
+
+ when others =>
+ null; -- Continue
+ end case;
end loop;
end Expect;
N : Integer;
type File_Descriptor_Array is
- array (Descriptors'Range) of File_Descriptor;
+ array (0 .. Descriptors'Length - 1) of File_Descriptor;
Fds : aliased File_Descriptor_Array;
+ Fds_Count : Natural := 0;
+
+ Fds_To_Descriptor : array (Fds'Range) of Integer;
+ -- Maps file descriptor entries from Fds to entries in Descriptors.
+ -- They do not have the same index when entries in Descriptors are null.
- type Integer_Array is array (Descriptors'Range) of Integer;
+ type Integer_Array is array (Fds'Range) of Integer;
Is_Set : aliased Integer_Array;
begin
for J in Descriptors'Range loop
- Fds (J) := Descriptors (J).Output_Fd;
+ if Descriptors (J) /= null then
+ Fds (Fds'First + Fds_Count) := Descriptors (J).Output_Fd;
+ Fds_To_Descriptor (Fds'First + Fds_Count) := J;
+ Fds_Count := Fds_Count + 1;
- if Descriptors (J).Buffer_Size = 0 then
- Buffer_Size := Integer'Max (Buffer_Size, 4096);
- else
- Buffer_Size :=
- Integer'Max (Buffer_Size, Descriptors (J).Buffer_Size);
+ if Descriptors (J).Buffer_Size = 0 then
+ Buffer_Size := Integer'Max (Buffer_Size, 4096);
+ else
+ Buffer_Size :=
+ Integer'Max (Buffer_Size, Descriptors (J).Buffer_Size);
+ end if;
end if;
end loop;
-- Buffer used for input. This is allocated only once, not for
-- every iteration of the loop
+ D : Integer;
+ -- Index in Descriptors
+
begin
-- Loop until we match or we have a timeout
loop
Num_Descriptors :=
- Poll (Fds'Address, Fds'Length, Timeout, Is_Set'Address);
+ Poll (Fds'Address, Fds_Count, Timeout, Is_Set'Address);
case Num_Descriptors is
-- Error?
when -1 =>
- raise Process_Died;
+ Result := Expect_Internal_Error;
+ return;
-- Timeout?
-- Some input
when others =>
- for J in Descriptors'Range loop
- if Is_Set (J) = 1 then
- Buffer_Size := Descriptors (J).Buffer_Size;
+ for F in Fds'Range loop
+ if Is_Set (F) = 1 then
+ D := Fds_To_Descriptor (F);
+
+ Buffer_Size := Descriptors (D).Buffer_Size;
if Buffer_Size = 0 then
Buffer_Size := 4096;
end if;
- N := Read (Descriptors (J).Output_Fd, Buffer'Address,
+ N := Read (Descriptors (D).Output_Fd, Buffer'Address,
Buffer_Size);
-- Error or End of file
if N <= 0 then
-- ??? Note that ddd tries again up to three times
-- in that case. See LiterateA.C:174
- raise Process_Died;
+
+ Descriptors (D).Input_Fd := Invalid_FD;
+ Result := Expect_Process_Died;
+ return;
else
-- If there is no limit to the buffer size
- if Descriptors (J).Buffer_Size = 0 then
+ if Descriptors (D).Buffer_Size = 0 then
declare
- Tmp : String_Access := Descriptors (J).Buffer;
+ Tmp : String_Access := Descriptors (D).Buffer;
begin
if Tmp /= null then
- Descriptors (J).Buffer :=
+ Descriptors (D).Buffer :=
new String (1 .. Tmp'Length + N);
- Descriptors (J).Buffer (1 .. Tmp'Length) :=
+ Descriptors (D).Buffer (1 .. Tmp'Length) :=
Tmp.all;
- Descriptors (J).Buffer
+ Descriptors (D).Buffer
(Tmp'Length + 1 .. Tmp'Length + N) :=
Buffer (1 .. N);
Free (Tmp);
- Descriptors (J).Buffer_Index :=
- Descriptors (J).Buffer'Last;
+ Descriptors (D).Buffer_Index :=
+ Descriptors (D).Buffer'Last;
else
- Descriptors (J).Buffer :=
+ Descriptors (D).Buffer :=
new String (1 .. N);
- Descriptors (J).Buffer.all :=
+ Descriptors (D).Buffer.all :=
Buffer (1 .. N);
- Descriptors (J).Buffer_Index := N;
+ Descriptors (D).Buffer_Index := N;
end if;
end;
else
-- Add what we read to the buffer
- if Descriptors (J).Buffer_Index + N >
- Descriptors (J).Buffer_Size
+ if Descriptors (D).Buffer_Index + N >
+ Descriptors (D).Buffer_Size
then
-- If the user wants to know when we have
-- read more than the buffer can contain.
-- Keep as much as possible from the buffer,
-- and forget old characters.
- Descriptors (J).Buffer
- (1 .. Descriptors (J).Buffer_Size - N) :=
- Descriptors (J).Buffer
- (N - Descriptors (J).Buffer_Size +
- Descriptors (J).Buffer_Index + 1 ..
- Descriptors (J).Buffer_Index);
- Descriptors (J).Buffer_Index :=
- Descriptors (J).Buffer_Size - N;
+ Descriptors (D).Buffer
+ (1 .. Descriptors (D).Buffer_Size - N) :=
+ Descriptors (D).Buffer
+ (N - Descriptors (D).Buffer_Size +
+ Descriptors (D).Buffer_Index + 1 ..
+ Descriptors (D).Buffer_Index);
+ Descriptors (D).Buffer_Index :=
+ Descriptors (D).Buffer_Size - N;
end if;
-- Keep what we read in the buffer
- Descriptors (J).Buffer
- (Descriptors (J).Buffer_Index + 1 ..
- Descriptors (J).Buffer_Index + N) :=
+ Descriptors (D).Buffer
+ (Descriptors (D).Buffer_Index + 1 ..
+ Descriptors (D).Buffer_Index + N) :=
Buffer (1 .. N);
- Descriptors (J).Buffer_Index :=
- Descriptors (J).Buffer_Index + N;
+ Descriptors (D).Buffer_Index :=
+ Descriptors (D).Buffer_Index + N;
end if;
-- Call each of the output filter with what we
-- read.
Call_Filters
- (Descriptors (J).all, Buffer (1 .. N), Output);
+ (Descriptors (D).all, Buffer (1 .. N), Output);
- Result := Expect_Match (N);
+ Result := Expect_Match (D);
return;
end if;
end if;
Expect_Internal (Descriptors, Result,
Timeout => 0, Full_Buffer => False);
+
+ if Result = Expect_Internal_Error
+ or else Result = Expect_Process_Died
+ then
+ raise Process_Died;
+ end if;
+
Descriptor.Last_Match_End := Descriptor.Buffer_Index;
-- Empty the buffer
projects / platform / upstream / gcc.git / commitdiff