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131 | -- part of AdaYaml, (c) 2017 Felix Krause
-- released under the terms of the MIT license, see the file "copying.txt"
with Ada.Exceptions;
with Yaml.Events.Queue;
with Yaml.Parser;
procedure Yaml.Inspect (Input : String) is
type Error_Kind is (None, From_Lexer, From_Parser);
P : Parser.Instance;
Cur_Pos : Positive := 1;
Next_Pos : Positive;
Cur_Event : Event;
Read_Events : constant Events.Queue.Reference := Events.Queue.New_Queue;
Occurred_Error : Error_Kind := None;
Lexer_Token_Start, Lexer_Token_End : Mark;
Exception_Message : access String;
begin
P.Set_Input (Input);
Start_Emitting;
Start_Parsed_Input;
begin
loop
Cur_Event := P.Next;
Read_Events.Value.Append (Cur_Event);
if Cur_Event.Start_Position.Index > Cur_Pos then
Next_Pos := Cur_Pos;
while Next_Pos <= Input'Last and then
Next_Pos < Cur_Event.Start_Position.Index loop
if Input (Next_Pos) = '#' then
if Cur_Pos < Next_Pos then
Emit_Whitespace (Input (Cur_Pos .. Next_Pos - 1));
Cur_Pos := Next_Pos;
end if;
while Next_Pos < Cur_Event.Start_Position.Index and then
Input (Next_Pos) /= Character'Val (10) loop
Next_Pos := Next_Pos + 1;
end loop;
Emit_Comment (Input (Cur_Pos .. Next_Pos - 1));
end if;
Next_Pos := Next_Pos + 1;
end loop;
if Cur_Pos < Next_Pos then
Emit_Whitespace (Input (Cur_Pos .. Next_Pos - 1));
Cur_Pos := Next_Pos;
end if;
end if;
Start_Rendered_Event (Cur_Event);
declare
Content : constant String :=
Input (Cur_Pos .. Cur_Event.End_Position.Index - 1);
Cur : Positive := Content'First;
Start : Positive;
begin
while Cur <= Content'Last loop
if Content (Cur) in ' ' | Character'Val (10) then
Start := Cur;
loop
Cur := Cur + 1;
exit when Cur > Content'Last or else
Content (Cur) in ' ' | Character'Val (10);
end loop;
Emit_Whitespace (Content (Start .. Cur - 1));
exit when Cur > Content'Last;
end if;
Start := Cur;
case Content (Cur) is
when '&' =>
loop
Cur := Cur + 1;
exit when Cur > Content'Last or else
Content (Cur) in ' ' | Character'Val (10);
end loop;
Emit_Anchor (Content (Start .. Cur - 1));
when '!' =>
loop
Cur := Cur + 1;
exit when Cur > Content'Last or else
Content (Cur) in ' ' | Character'Val (10);
end loop;
Emit_Tag (Content (Start .. Cur - 1));
when others =>
Emit_Event_Content (Content (Start .. Content'Last));
exit;
end case;
end loop;
end;
End_Rendered_Event;
Cur_Pos := Cur_Event.End_Position.Index;
exit when Cur_Event.Kind = Stream_End;
end loop;
exception
when Error : Lexer_Error =>
Emit_Unparseable (Input (Cur_Pos .. Input'Last));
Occurred_Error := From_Lexer;
Lexer_Token_Start := P.Current_Lexer_Token_Start;
Lexer_Token_End := P.Current_Input_Character;
Exception_Message := new String'(Ada.Exceptions.Exception_Message (Error));
when Error : Parser_Error =>
Emit_Unparseable (Input (Cur_Pos .. Input'Last));
Occurred_Error := From_Parser;
Lexer_Token_Start := P.Recent_Lexer_Token_Start;
Lexer_Token_End := P.Recent_Lexer_Token_End;
Exception_Message := new String'(Ada.Exceptions.Exception_Message (Error));
end;
End_Parsed_Input;
Start_Parsed_Output;
case Occurred_Error is
when None =>
declare
Iterator : constant Events.Queue.Stream_Reference :=
Events.Queue.As_Stream (Read_Events);
begin
loop
Cur_Event := Iterator.Value.Next;
Emit_Raw_Event (Cur_Event);
exit when Cur_Event.Kind = Stream_End;
end loop;
end;
when From_Lexer =>
Emit_Lexer_Error (Lexer_Token_Start, Lexer_Token_End,
Exception_Message.all);
when From_Parser =>
Emit_Parser_Error (Lexer_Token_Start, Lexer_Token_End,
Exception_Message.all);
end case;
End_Parsed_Output;
Finish_Emitting;
end Yaml.Inspect;
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