4 * BabelTrace - Sequence Type Converter
6 * Copyright 2010-2011 EfficiOS Inc. and Linux Foundation
8 * Author: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
10 * Permission is hereby granted, free of charge, to any person obtaining a copy
11 * of this software and associated documentation files (the "Software"), to deal
12 * in the Software without restriction, including without limitation the rights
13 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
14 * copies of the Software, and to permit persons to whom the Software is
15 * furnished to do so, subject to the following conditions:
17 * The above copyright notice and this permission notice shall be included in
18 * all copies or substantial portions of the Software.
21 #include <babeltrace/compiler.h>
22 #include <babeltrace/format.h>
23 #include <babeltrace/types.h>
27 struct definition
*_sequence_definition_new(struct declaration
*declaration
,
28 struct definition_scope
*parent_scope
,
29 GQuark field_name
, int index
,
30 const char *root_name
);
32 void _sequence_definition_free(struct definition
*definition
);
34 int sequence_rw(struct stream_pos
*pos
, struct definition
*definition
)
36 struct definition_sequence
*sequence_definition
=
37 container_of(definition
, struct definition_sequence
, p
);
38 const struct declaration_sequence
*sequence_declaration
=
39 sequence_definition
->declaration
;
40 uint64_t len
, oldlen
, i
;
43 len
= sequence_definition
->length
->value
._unsigned
;
45 * Yes, large sequences could be _painfully slow_ to parse due
46 * to memory allocation for each event read. At least, never
47 * shrink the sequence. Note: the sequence GArray len should
48 * never be used as indicator of the current sequence length.
49 * One should always look at the sequence->len->value._unsigned
52 oldlen
= sequence_definition
->elems
->len
;
54 g_ptr_array_set_size(sequence_definition
->elems
, len
);
56 for (i
= oldlen
; i
< len
; i
++) {
57 struct definition
**field
;
61 str
= g_string_new("");
62 g_string_printf(str
, "[%" PRIu64
"]", i
);
63 name
= g_quark_from_string(str
->str
);
64 (void) g_string_free(str
, TRUE
);
66 field
= (struct definition
**) &g_ptr_array_index(sequence_definition
->elems
, i
);
67 *field
= sequence_declaration
->elem
->definition_new(sequence_declaration
->elem
,
68 sequence_definition
->p
.scope
,
71 for (i
= 0; i
< len
; i
++) {
72 struct definition
**field
;
74 field
= (struct definition
**) &g_ptr_array_index(sequence_definition
->elems
, i
);
75 ret
= generic_rw(pos
, *field
);
83 void _sequence_declaration_free(struct declaration
*declaration
)
85 struct declaration_sequence
*sequence_declaration
=
86 container_of(declaration
, struct declaration_sequence
, p
);
88 free_declaration_scope(sequence_declaration
->scope
);
89 g_array_free(sequence_declaration
->length_name
, TRUE
);
90 declaration_unref(sequence_declaration
->elem
);
91 g_free(sequence_declaration
);
94 struct declaration_sequence
*
95 sequence_declaration_new(const char *length
,
96 struct declaration
*elem_declaration
,
97 struct declaration_scope
*parent_scope
)
99 struct declaration_sequence
*sequence_declaration
;
100 struct declaration
*declaration
;
102 sequence_declaration
= g_new(struct declaration_sequence
, 1);
103 declaration
= &sequence_declaration
->p
;
105 sequence_declaration
->length_name
= g_array_new(FALSE
, TRUE
, sizeof(GQuark
));
106 append_scope_path(length
, sequence_declaration
->length_name
);
108 declaration_ref(elem_declaration
);
109 sequence_declaration
->elem
= elem_declaration
;
110 sequence_declaration
->scope
= new_declaration_scope(parent_scope
);
111 declaration
->id
= CTF_TYPE_SEQUENCE
;
112 declaration
->alignment
= elem_declaration
->alignment
;
113 declaration
->declaration_free
= _sequence_declaration_free
;
114 declaration
->definition_new
= _sequence_definition_new
;
115 declaration
->definition_free
= _sequence_definition_free
;
116 declaration
->ref
= 1;
117 return sequence_declaration
;
121 struct definition
*_sequence_definition_new(struct declaration
*declaration
,
122 struct definition_scope
*parent_scope
,
123 GQuark field_name
, int index
,
124 const char *root_name
)
126 struct declaration_sequence
*sequence_declaration
=
127 container_of(declaration
, struct declaration_sequence
, p
);
128 struct definition_sequence
*sequence
;
129 struct definition
*len_parent
;
132 sequence
= g_new(struct definition_sequence
, 1);
133 declaration_ref(&sequence_declaration
->p
);
134 sequence
->p
.declaration
= declaration
;
135 sequence
->declaration
= sequence_declaration
;
138 * Use INT_MAX order to ensure that all fields of the parent
139 * scope are seen as being prior to this scope.
141 sequence
->p
.index
= root_name
? INT_MAX
: index
;
142 sequence
->p
.name
= field_name
;
143 sequence
->p
.path
= new_definition_path(parent_scope
, field_name
, root_name
);
144 sequence
->p
.scope
= new_definition_scope(parent_scope
, field_name
, root_name
);
145 ret
= register_field_definition(field_name
, &sequence
->p
,
148 len_parent
= lookup_path_definition(sequence
->p
.scope
->scope_path
,
149 sequence_declaration
->length_name
,
152 printf("[error] Lookup for sequence length field failed.\n");
156 container_of(len_parent
, struct definition_integer
, p
);
157 if (sequence
->length
->declaration
->signedness
) {
158 printf("[error] Sequence length field should be unsigned.\n");
161 definition_ref(len_parent
);
163 sequence
->string
= NULL
;
164 sequence
->elems
= NULL
;
166 if (sequence_declaration
->elem
->id
== CTF_TYPE_INTEGER
) {
167 struct declaration_integer
*integer_declaration
=
168 container_of(sequence_declaration
->elem
, struct declaration_integer
, p
);
170 if (integer_declaration
->encoding
== CTF_STRING_UTF8
171 || integer_declaration
->encoding
== CTF_STRING_ASCII
) {
173 sequence
->string
= g_string_new("");
175 if (integer_declaration
->len
== CHAR_BIT
176 && integer_declaration
->p
.alignment
== CHAR_BIT
) {
182 sequence
->elems
= g_ptr_array_new();
186 free_definition_scope(sequence
->p
.scope
);
187 declaration_unref(&sequence_declaration
->p
);
193 void _sequence_definition_free(struct definition
*definition
)
195 struct definition_sequence
*sequence
=
196 container_of(definition
, struct definition_sequence
, p
);
197 struct definition
*len_definition
= &sequence
->length
->p
;
200 if (sequence
->string
)
201 (void) g_string_free(sequence
->string
, TRUE
);
202 if (sequence
->elems
) {
203 for (i
= 0; i
< sequence
->elems
->len
; i
++) {
204 struct definition
*field
;
206 field
= g_ptr_array_index(sequence
->elems
, i
);
207 field
->declaration
->definition_free(field
);
210 (void) g_ptr_array_free(sequence
->elems
, TRUE
);
211 definition_unref(len_definition
);
212 free_definition_scope(sequence
->p
.scope
);
213 declaration_unref(sequence
->p
.declaration
);
217 uint64_t sequence_len(struct definition_sequence
*sequence
)
219 return sequence
->length
->value
._unsigned
;
222 struct definition
*sequence_index(struct definition_sequence
*sequence
, uint64_t i
)
224 if (!sequence
->elems
)
226 if (i
>= sequence
->length
->value
._unsigned
)
228 assert(i
< sequence
->elems
->len
);
229 return g_ptr_array_index(sequence
->elems
, i
);