22
23
24
25
26
27
28
29
30
31
32
33
34
35
|
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
|
+
|
-- Descriptor interface. A subparser is constrained to its initial nesting --
-- level, and reports end-of-input instead of reaching lower. --
------------------------------------------------------------------------------
with Ada.Streams;
with Natools.S_Expressions.Atom_Buffers;
with Natools.S_Expressions.Lockable;
package Natools.S_Expressions.Parsers is
pragma Preelaborate (Natools.S_Expressions.Parsers);
type Parser is tagged private;
function Current_Event (P : in Parser) return Events.Event;
|
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
|
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
|
-
+
+
+
+
+
+
+
+
+
+
+
|
(P : in out Parser;
Input : not null access Ada.Streams.Root_Stream_Type'Class);
type Subparser
(Backend : access Parser;
Input : access Ada.Streams.Root_Stream_Type'Class)
is new Descriptor with private;
is new Lockable.Descriptor with private;
overriding function Current_Event (P : in Subparser) return Events.Event;
overriding function Current_Atom (P : in Subparser) return Atom;
overriding function Current_Level (P : in Subparser) return Natural;
overriding procedure Query_Atom
(P : in Subparser;
Process : not null access procedure (Data : in Atom));
overriding procedure Read_Atom
(P : in Subparser;
Data : out Atom;
Length : out Count);
overriding procedure Next (P : in out Subparser; Event : out Events.Event);
overriding procedure Lock
(Object : in out Subparser;
State : out Lockable.Lock_State);
overriding procedure Unlock
(Object : in out Subparser;
State : in out Lockable.Lock_State;
Finish : in Boolean := True);
procedure Finish (P : in out Subparser);
-- Read enough data to exhaust intial nesting level
private
type Internal_State is
(Waiting, -- waiting for a marker
|
116
117
118
119
120
121
122
123
124
125
126
127
128
129
|
127
128
129
130
131
132
133
134
135
136
137
138
139
140
|
-
-
+
+
|
Buffer : Atom_Buffers.Atom_Buffer;
Level : Natural := 0;
end record;
type Subparser
(Backend : access Parser;
Input : access Ada.Streams.Root_Stream_Type'Class)
is new Descriptor with record
Base_Level : Natural := 0;
is new Lockable.Descriptor with record
Levels : Lockable.Lock_Stack;
Initialized : Boolean := False;
Terminated : Boolean := False;
end record;
end Natools.S_Expressions.Parsers;
|