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Libraries
asn1c
Commits
1bbc2001
Commit
1bbc2001
authored
Oct 23, 2004
by
Lev Walkin
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Plain Diff
initial XER decoder implementation
parent
d2de48aa
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2
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skeletons/constr_SEQUENCE.c
skeletons/constr_SEQUENCE.c
+193
-0
skeletons/constr_SEQUENCE.h
skeletons/constr_SEQUENCE.h
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skeletons/constr_SEQUENCE.c
View file @
1bbc2001
...
...
@@ -588,6 +588,199 @@ SEQUENCE_encode_der(asn_TYPE_descriptor_t *td,
return
erval
;
}
#undef ADVANCE
/* Just in case */
#undef XER_ADVANCE
#define XER_ADVANCE(num_bytes) do { \
size_t num = num_bytes; \
buf_ptr = ((char *)buf_ptr) + num; \
size -= num; \
consumed_myself += num; \
} while(0)
asn_dec_rval_t
SEQUENCE_decode_xer
(
asn_codec_ctx_t
*
opt_codec_ctx
,
asn_TYPE_descriptor_t
*
td
,
void
**
struct_ptr
,
const
char
*
opt_mname
,
void
*
buf_ptr
,
size_t
size
)
{
/*
* Bring closer parts of structure description.
*/
asn_SEQUENCE_specifics_t
*
specs
=
(
asn_SEQUENCE_specifics_t
*
)
td
->
specifics
;
asn_TYPE_member_t
*
elements
=
td
->
elements
;
const
char
*
xml_tag
=
opt_mname
?
opt_mname
:
td
->
xml_tag
;
/*
* Parts of the structure being constructed.
*/
void
*
st
=
*
struct_ptr
;
/* Target structure. */
asn_struct_ctx_t
*
ctx
;
/* Decoder context */
asn_dec_rval_t
rval
;
ssize_t
consumed_myself
=
0
;
/* Consumed bytes from ptr */
int
xer_state
;
/* XER low level parsing context */
int
edx
;
/* Element index */
/*
* Create the target structure if it is not present already.
*/
if
(
st
==
0
)
{
st
=
*
struct_ptr
=
CALLOC
(
1
,
specs
->
struct_size
);
if
(
st
==
0
)
RETURN
(
RC_FAIL
);
}
/*
* Restore parsing context.
*/
ctx
=
(
asn_struct_ctx_t
*
)((
char
*
)
st
+
specs
->
ctx_offset
);
/*
* Phases of XER/XML processing:
* Phase 0: Check that the opening tag matches our expectations.
* Phase 1: Processing body and reacting on closing tag.
* Phase 2: Processing inner type.
*/
if
(
ctx
->
phase
>
2
)
RETURN
(
RC_FAIL
);
for
(
xer_state
=
ctx
->
left
,
edx
=
ctx
->
step
;;)
{
pxer_chunk_type_e
ch_type
;
/* XER chunk type */
ssize_t
ch_size
;
/* Chunk size */
xer_check_tag_e
tcv
;
/* Tag check value */
asn_TYPE_member_t
*
elm
;
/*
* Go inside the member.
*/
if
(
ctx
->
phase
==
2
)
{
asn_dec_rval_t
tmprval
;
elm
=
&
td
->
elements
[
edx
];
void
*
memb_ptr
;
/* Pointer to the member */
void
**
memb_ptr2
;
/* Pointer to that pointer */
if
(
elm
->
flags
&
ATF_POINTER
)
{
/* Member is a pointer to another structure */
memb_ptr2
=
(
void
**
)((
char
*
)
st
+
elm
->
memb_offset
);
}
else
{
memb_ptr
=
(
char
*
)
st
+
elm
->
memb_offset
;
memb_ptr2
=
&
memb_ptr
;
}
tmprval
=
elm
->
type
->
xer_decoder
(
opt_codec_ctx
,
elm
->
type
,
memb_ptr2
,
elm
->
name
,
buf_ptr
,
size
);
XER_ADVANCE
(
tmprval
.
consumed
);
if
(
tmprval
.
code
!=
RC_OK
)
RETURN
(
tmprval
.
code
);
ctx
->
phase
=
1
;
ctx
->
left
=
xer_state
=
0
;
/* New, clean state */
ctx
->
step
=
++
edx
;
/* Fall through */
}
/*
* Get the next part of the XML stream.
*/
ch_size
=
xer_next_token
(
&
xer_state
,
buf_ptr
,
size
,
&
ch_type
);
switch
(
ch_size
)
{
case
-
1
:
RETURN
(
RC_FAIL
);
case
0
:
ctx
->
left
=
xer_state
;
RETURN
(
RC_WMORE
);
default:
switch
(
ch_type
)
{
case
PXER_COMMENT
:
/* Got XML comment */
case
PXER_TEXT
:
/* Ignore free-standing text */
XER_ADVANCE
(
ch_size
);
/* Skip silently */
continue
;
case
PXER_TAG
:
break
;
/* Check the rest down there */
}
}
tcv
=
xer_check_tag
(
buf_ptr
,
size
,
xml_tag
);
switch
(
tcv
)
{
case
XCT_CLOSING
:
if
(
ctx
->
phase
==
0
)
break
;
XER_ADVANCE
(
ch_size
);
ctx
->
phase
=
0
;
/* Fall through */
case
XCT_BOTH
:
if
(
ctx
->
phase
==
0
)
{
if
(
edx
>=
td
->
elements_count
||
/* Explicit OPTIONAL specs reaches the end */
(
edx
+
elements
[
edx
].
optional
==
td
->
elements_count
)
||
/* All extensions are optional */
(
IN_EXTENSION_GROUP
(
specs
,
edx
)
&&
specs
->
ext_before
>
td
->
elements_count
)
)
{
XER_ADVANCE
(
ch_size
);
ctx
->
phase
=
3
;
/* Phase out */
continue
;
}
else
{
ASN_DEBUG
(
"Premature end of XER SEQUENCE"
);
RETURN
(
RC_FAIL
);
}
}
/* Fall through */
case
XCT_OPENING
:
if
(
ctx
->
phase
==
0
)
{
XER_ADVANCE
(
ch_size
);
ctx
->
phase
=
1
;
/* Processing body phase */
continue
;
}
case
XCT_UNEXPECTED
:
{
int
edx_end
;
int
n
;
if
(
!
ctx
->
phase
||
edx
>=
td
->
elements_count
||
!
IN_EXTENSION_GROUP
(
specs
,
td
->
elements_count
))
break
;
/* Really unexpected */
/*
* Search which member corresponds to this tag.
*/
edx_end
=
edx
+
elements
[
edx
].
optional
+
1
;
for
(
n
=
edx
;
n
<
edx_end
;
n
++
)
{
elm
=
&
td
->
elements
[
n
];
tcv
=
xer_check_tag
(
buf_ptr
,
size
,
elm
->
name
);
switch
(
tcv
)
{
case
XCT_BOTH
:
case
XCT_OPENING
:
/*
* Process this member.
*/
ctx
->
step
=
edx
=
n
;
ctx
->
phase
=
2
;
break
;
case
XCT_UNEXPECTED
:
continue
;
/* or continue; */
case
XCT_CLOSING
:
default:
n
=
edx_end
;
break
;
/* Phase out */
}
break
;
}
if
(
n
==
edx_end
)
break
;
continue
;
}
default:
break
;
}
ASN_DEBUG
(
"Unexpected XML tag in SEQUENCE"
);
break
;
}
ctx
->
phase
=
3
;
/* Phase out, just in case */
RETURN
(
RC_FAIL
);
}
asn_enc_rval_t
SEQUENCE_encode_xer
(
asn_TYPE_descriptor_t
*
td
,
void
*
sptr
,
int
ilevel
,
enum
xer_encoder_flags_e
flags
,
...
...
skeletons/constr_SEQUENCE.h
View file @
1bbc2001
...
...
@@ -36,6 +36,7 @@ asn_struct_print_f SEQUENCE_print;
asn_constr_check_f
SEQUENCE_constraint
;
ber_type_decoder_f
SEQUENCE_decode_ber
;
der_type_encoder_f
SEQUENCE_encode_der
;
xer_type_decoder_f
SEQUENCE_decode_xer
;
xer_type_encoder_f
SEQUENCE_encode_xer
;
#endif
/* _CONSTR_SEQUENCE_H_ */
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