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opencv/modules/core/src/persistence_xml.cpp at master · pythonmjs/opencv · GitHub
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//
This file is part of OpenCV project.
//
It is subject to the license terms in the LICENSE file found in the top-level directory
//
of this distribution and at http://opencv.org/license.html
#
include
"
precomp.hpp
"
#
include
"
persistence.hpp
"
#
define
CV_XML_INDENT
2
#
define
CV_XML_INSIDE_COMMENT
1
#
define
CV_XML_INSIDE_TAG
2
#
define
CV_XML_INSIDE_DIRECTIVE
3
#
define
CV_XML_OPENING_TAG
1
#
define
CV_XML_CLOSING_TAG
2
#
define
CV_XML_EMPTY_TAG
3
#
define
CV_XML_HEADER_TAG
4
#
define
CV_XML_DIRECTIVE_TAG
5
/*
***************************************************************************************\
* XML Parser *
\***************************************************************************************
*/
static
char
*
icvXMLSkipSpaces
( CvFileStorage* fs,
char
* ptr,
int
mode )
{
int
level =
0
;
for
(;;)
{
char
c;
ptr--;
if
( mode ==
CV_XML_INSIDE_COMMENT
)
{
do
c = *++ptr;
while
(
cv_isprint_or_tab
(c) && (c !=
'
-
'
|| ptr[
1
] !=
'
-
'
|| ptr[
2
] !=
'
>
'
) );
if
( c ==
'
-
'
)
{
assert
( ptr[
1
] ==
'
-
'
&& ptr[
2
] ==
'
>
'
);
mode =
0
;
ptr +=
3
;
}
}
else
if
( mode ==
CV_XML_INSIDE_DIRECTIVE
)
{
//
!!!NOTE!!! This is not quite correct, but should work in most cases
do
{
c = *++ptr;
level += c ==
'
<
'
;
level -= c ==
'
>
'
;
if
( level <
0
)
return
ptr;
}
while
(
cv_isprint_or_tab
(c) );
}
else
{
do
c = *++ptr;
while
( c ==
'
'
|| c ==
'
\t
'
);
if
( c ==
'
<
'
&& ptr[
1
] ==
'
!
'
&& ptr[
2
] ==
'
-
'
&& ptr[
3
] ==
'
-
'
)
{
if
( mode !=
0
)
CV_PARSE_ERROR
(
"
Comments are not allowed here
"
);
mode =
CV_XML_INSIDE_COMMENT
;
ptr +=
4
;
}
else
if
(
cv_isprint
(c) )
break
;
}
if
( !
cv_isprint
(*ptr) )
{
int
max_size = (
int
)(fs->
buffer_end
- fs->
buffer_start
);
if
( *ptr !=
'
\0
'
&& *ptr !=
'
\n
'
&& *ptr !=
'
\r
'
)
CV_PARSE_ERROR
(
"
Invalid character in the stream
"
);
ptr =
icvGets
( fs, fs->
buffer_start
, max_size );
if
( !ptr )
{
ptr = fs->
buffer_start
;
//
FIXIT Why do we need this hack? What is about other parsers JSON/YAML?
*ptr =
'
\0
'
;
fs->
dummy_eof
=
1
;
break
;
}
else
{
int
l = (
int
)
strlen
(ptr);
if
( ptr[l-
1
] !=
'
\n
'
&& ptr[l-
1
] !=
'
\r
'
&& !
icvEof
(fs) )
CV_PARSE_ERROR
(
"
Too long string or a last string w/o newline
"
);
}
fs->
lineno
++;
//
FIXIT doesn't really work with long lines. It must be counted via '\n' or '\r' symbols, not the number of icvGets() calls.
}
}
return
ptr;
}
static
void
icvXMLGetMultilineStringContent
(CvFileStorage* fs,
char
* ptr,
char
* &beg,
char
* &end)
{
ptr =
icvXMLSkipSpaces
(fs, ptr,
CV_XML_INSIDE_TAG
);
beg = ptr;
end = ptr;
if
( fs->
dummy_eof
)
return
;
/*
end of file
*/
if
( *beg ==
'
<
'
)
return
;
/*
end of string
*/
/*
find end
*/
while
(
cv_isprint
(*ptr) )
/*
no check for base64 string
*/
++ ptr;
if
( *ptr ==
'
\0
'
)
CV_PARSE_ERROR
(
"
Unexpected end of line
"
);
end = ptr;
}
static
char
*
icvXMLParseBase64
(CvFileStorage* fs,
char
* ptr, CvFileNode * node)
{
char
* beg =
0
;
char
* end =
0
;
icvXMLGetMultilineStringContent
(fs, ptr, beg, end);
if
(beg >= end)
return
end;
//
CV_PARSE_ERROR("Empty Binary Data");
/*
calc (decoded) total_byte_size from header
*/
std::string dt;
{
if
(end - beg <
static_cast
<
int
>(base64::
ENCODED_HEADER_SIZE
))
CV_PARSE_ERROR
(
"
Unrecognized Base64 header
"
);
std::vector<
char
>
header
(base64::
HEADER_SIZE
+
1
,
'
'
);
base64::base64_decode
(beg, header.
data
(),
0U
, base64::
ENCODED_HEADER_SIZE
);
if
( !
base64::read_base64_header
(header, dt) || dt.
empty
() )
CV_PARSE_ERROR
(
"
Invalid `dt` in Base64 header
"
);
beg += base64::
ENCODED_HEADER_SIZE
;
}
/*
get all Base64 data
*/
std::string base64_buffer;
//
not an efficient way.
base64_buffer.
reserve
(
PARSER_BASE64_BUFFER_SIZE
);
while
( beg < end )
{
base64_buffer.
append
( beg, end );
beg = end;
icvXMLGetMultilineStringContent
( fs, beg, beg, end );
}
if
( base64_buffer.
empty
() ||
!
base64::base64_valid
(base64_buffer.
data
(),
0U
, base64_buffer.
size
()) )
CV_PARSE_ERROR
(
"
Invalid Base64 data.
"
);
/*
alloc buffer for all decoded data(include header)
*/
std::vector<uchar>
binary_buffer
(
base64::base64_decode_buffer_size
(base64_buffer.
size
()) );
int
total_byte_size =
static_cast
<
int
>(
base64::base64_decode_buffer_size
( base64_buffer.
size
(), base64_buffer.
data
(),
false
)
);
{
base64::Base64ContextParser
parser
(binary_buffer.
data
(), binary_buffer.
size
() );
const
uchar * buffer_beg =
reinterpret_cast
<
const
uchar *>( base64_buffer.
data
() );
const
uchar * buffer_end = buffer_beg + base64_buffer.
size
();
parser.
read
( buffer_beg, buffer_end );
parser.
flush
();
}
/*
save as CvSeq
*/
int
elem_size = ::
icvCalcStructSize
(dt.
c_str
(),
0
);
if
(total_byte_size % elem_size !=
0
)
CV_PARSE_ERROR
(
"
data size not matches elememt size
"
);
int
elem_cnt = total_byte_size / elem_size;
node->
tag
=
CV_NODE_NONE
;
int
struct_flags =
CV_NODE_SEQ
;
/*
after icvFSCreateCollection, node->tag == struct_flags
*/
icvFSCreateCollection
(fs, struct_flags, node);
base64::make_seq
(binary_buffer.
data
(), elem_cnt, dt.
c_str
(), *node->
data
.
seq
);
if
(fs->
dummy_eof
) {
/*
end of file
*/
return
fs->
buffer_start
;
}
else
{
/*
end of line
*/
return
end;
}
}
static
char
*
icvXMLParseTag
( CvFileStorage* fs,
char
* ptr, CvStringHashNode** _tag,
CvAttrList** _list,
int
* _tag_type );
static
char
*
icvXMLParseValue
( CvFileStorage* fs,
char
* ptr, CvFileNode* node,
int
value_type
CV_DEFAULT
(
CV_NODE_NONE
))
{
CvFileNode *elem = node;
bool
have_space =
true
, is_simple =
true
;
int
is_user_type =
CV_NODE_IS_USER
(value_type);
memset
( node,
0
,
sizeof
(*node) );
value_type =
CV_NODE_TYPE
(value_type);
for
(;;)
{
char
c = *ptr, d;
char
* endptr;
if
(
cv_isspace
(c) || c ==
'
\0
'
|| (c ==
'
<
'
&& ptr[
1
] ==
'
!
'
&& ptr[
2
] ==
'
-
'
) )
//
FIXIT ptr[1], ptr[2] - out of bounds read without check or data fetch (#11061)
{
ptr =
icvXMLSkipSpaces
( fs, ptr,
0
);
have_space =
true
;
c = *ptr;
}
d = ptr[
1
];
//
FIXIT ptr[1] - out of bounds read without check or data fetch (#11061)
if
( c ==
'
<
'
|| c ==
'
\0
'
)
{
CvStringHashNode *key =
0
, *key2 =
0
;
CvAttrList* list =
0
;
CvTypeInfo* info =
0
;
int
tag_type =
0
;
int
is_noname =
0
;
const
char
* type_name =
0
;
int
elem_type =
CV_NODE_NONE
;
if
( d ==
'
/
'
|| c ==
'
\0
'
)
break
;
ptr =
icvXMLParseTag
( fs, ptr, &key, &list, &tag_type );
if
( tag_type ==
CV_XML_DIRECTIVE_TAG
)
CV_PARSE_ERROR
(
"
Directive tags are not allowed here
"
);
if
( tag_type ==
CV_XML_EMPTY_TAG
)
CV_PARSE_ERROR
(
"
Empty tags are not supported
"
);
CV_Assert
(tag_type ==
CV_XML_OPENING_TAG
);
/*
for base64 string
*/
bool
is_binary_string =
false
;
type_name = list ?
cvAttrValue
( list,
"
type_id
"
) :
0
;
if
( type_name )
{
if
(
strcmp
( type_name,
"
str
"
) ==
0
)
elem_type =
CV_NODE_STRING
;
else
if
(
strcmp
( type_name,
"
map
"
) ==
0
)
elem_type =
CV_NODE_MAP
;
else
if
(
strcmp
( type_name,
"
seq
"
) ==
0
)
elem_type =
CV_NODE_SEQ
;
else
if
(
strcmp
(type_name,
"
binary
"
) ==
0
)
{
elem_type =
CV_NODE_NONE
;
is_binary_string =
true
;
}
else
{
info =
cvFindType
( type_name );
if
( info )
elem_type =
CV_NODE_USER
;
}
}
is_noname = key->
str
.
len
==
1
&& key->
str
.
ptr
[
0
] ==
'
_
'
;
if
( !
CV_NODE_IS_COLLECTION
(node->
tag
) )
{
icvFSCreateCollection
( fs, is_noname ?
CV_NODE_SEQ
:
CV_NODE_MAP
, node );
}
else
if
( is_noname ^
CV_NODE_IS_SEQ
(node->
tag
) )
CV_PARSE_ERROR
( is_noname ?
"
Map element should have a name
"
:
"
Sequence element should not have name (use <_></_>)
"
);
if
( is_noname )
elem = (CvFileNode*)
cvSeqPush
( node->
data
.
seq
,
0
);
else
elem =
cvGetFileNode
( fs, node, key,
1
);
CV_Assert
(elem);
if
(!is_binary_string)
ptr =
icvXMLParseValue
( fs, ptr, elem, elem_type);
else
{
/*
for base64 string
*/
ptr =
icvXMLParseBase64
( fs, ptr, elem);
ptr =
icvXMLSkipSpaces
( fs, ptr,
0
);
}
if
( !is_noname )
elem->
tag
|=
CV_NODE_NAMED
;
is_simple = is_simple && !
CV_NODE_IS_COLLECTION
(elem->
tag
);
elem->
info
= info;
ptr =
icvXMLParseTag
( fs, ptr, &key2, &list, &tag_type );
if
( tag_type !=
CV_XML_CLOSING_TAG
|| key2 != key )
CV_PARSE_ERROR
(
"
Mismatched closing tag
"
);
have_space =
true
;
}
else
{
if
( !have_space )
CV_PARSE_ERROR
(
"
There should be space between literals
"
);
elem = node;
if
( node->
tag
!=
CV_NODE_NONE
)
{
if
( !
CV_NODE_IS_COLLECTION
(node->
tag
) )
icvFSCreateCollection
( fs,
CV_NODE_SEQ
, node );
elem = (CvFileNode*)
cvSeqPush
( node->
data
.
seq
,
0
);
elem->
info
=
0
;
}
if
( value_type !=
CV_NODE_STRING
&&
(
cv_isdigit
(c) || ((c ==
'
-
'
|| c ==
'
+
'
) &&
(
cv_isdigit
(d) || d ==
'
.
'
)) || (c ==
'
.
'
&&
cv_isalnum
(d))) )
//
a number
{
double
fval;
int
ival;
endptr = ptr + (c ==
'
-
'
|| c ==
'
+
'
);
while
(
cv_isdigit
(*endptr) )
endptr++;
if
( *endptr ==
'
.
'
|| *endptr ==
'
e
'
)
{
fval =
icv_strtod
( fs, ptr, &endptr );
/*
if( endptr == ptr || cv_isalpha(*endptr) )
icvProcessSpecialDouble( fs, ptr, &fval, &endptr ));
*/
elem->
tag
=
CV_NODE_REAL
;
elem->
data
.
f
= fval;
}
else
{
ival = (
int
)
strtol
( ptr, &endptr,
0
);
elem->
tag
=
CV_NODE_INT
;
elem->
data
.
i
= ival;
}
if
( endptr == ptr )
CV_PARSE_ERROR
(
"
Invalid numeric value (inconsistent explicit type specification?)
"
);
ptr = endptr;
CV_PERSISTENCE_CHECK_END_OF_BUFFER_BUG
();
}
else
{
//
string
char
buf[
CV_FS_MAX_LEN
+
16
] = {
0
};
int
i =
0
, len, is_quoted =
0
;
elem->
tag
=
CV_NODE_STRING
;
if
( c ==
'
\"
'
)
is_quoted =
1
;
else
--ptr;
for
( ;; )
{
c = *++ptr;
CV_PERSISTENCE_CHECK_END_OF_BUFFER_BUG
();
if
( !
cv_isalnum
(c) )
{
if
( c ==
'
\"
'
)
{
if
( !is_quoted )
CV_PARSE_ERROR
(
"
Literal
\"
is not allowed within a string. Use "
"
);
++ptr;
break
;
}
else
if
( !
cv_isprint
(c) || c ==
'
<
'
|| (!is_quoted &&
cv_isspace
(c)))
{
if
( is_quoted )
CV_PARSE_ERROR
(
"
Closing
\"
is expected
"
);
break
;
}
else
if
( c ==
'
\'
'
|| c ==
'
>
'
)
{
CV_PARSE_ERROR
(
"
Literal
\'
or > are not allowed. Use ' or >
"
);
}
else
if
( c ==
'
&
'
)
{
if
( *++ptr ==
'
#
'
)
{
int
val, base =
10
;
ptr++;
if
( *ptr ==
'
x
'
)
{
base =
16
;
ptr++;
}
val = (
int
)
strtol
( ptr, &endptr, base );
if
( (
unsigned
)val > (
unsigned
)
255
||
!endptr || *endptr !=
'
;
'
)
CV_PARSE_ERROR
(
"
Invalid numeric value in the string
"
);
c = (
char
)val;
}
else
{
endptr = ptr;
do
c = *++endptr;
while
(
cv_isalnum
(c) );
if
( c !=
'
;
'
)
CV_PARSE_ERROR
(
"
Invalid character in the symbol entity name
"
);
len = (
int
)(endptr - ptr);
if
( len ==
2
&&
memcmp
( ptr,
"
lt
"
, len ) ==
0
)
c =
'
<
'
;
else
if
( len ==
2
&&
memcmp
( ptr,
"
gt
"
, len ) ==
0
)
c =
'
>
'
;
else
if
( len ==
3
&&
memcmp
( ptr,
"
amp
"
, len ) ==
0
)
c =
'
&
'
;
else
if
( len ==
4
&&
memcmp
( ptr,
"
apos
"
, len ) ==
0
)
c =
'
\'
'
;
else
if
( len ==
4
&&
memcmp
( ptr,
"
quot
"
, len ) ==
0
)
c =
'
\"
'
;
else
{
memcpy
( buf + i, ptr-
1
, len +
2
);
i += len +
2
;
}
}
ptr = endptr;
CV_PERSISTENCE_CHECK_END_OF_BUFFER_BUG
();
}
}
buf[i++] = c;
if
( i >=
CV_FS_MAX_LEN
)
CV_PARSE_ERROR
(
"
Too long string literal
"
);
}
elem->
data
.
str
=
cvMemStorageAllocString
( fs->
memstorage
, buf, i );
}
if
( !
CV_NODE_IS_COLLECTION
(value_type) && value_type !=
CV_NODE_NONE
)
break
;
have_space =
false
;
}
}
if
( (
CV_NODE_TYPE
(node->
tag
) ==
CV_NODE_NONE
||
(
CV_NODE_TYPE
(node->
tag
) != value_type &&
!
CV_NODE_IS_COLLECTION
(node->
tag
))) &&
CV_NODE_IS_COLLECTION
(value_type) )
{
icvFSCreateCollection
( fs,
CV_NODE_IS_MAP
(value_type) ?
CV_NODE_MAP
:
CV_NODE_SEQ
, node );
}
if
( value_type !=
CV_NODE_NONE
&&
value_type !=
CV_NODE_TYPE
(node->
tag
) )
CV_PARSE_ERROR
(
"
The actual type is different from the specified type
"
);
if
(
CV_NODE_IS_COLLECTION
(node->
tag
) && is_simple )
node->
data
.
seq
->
flags
|=
CV_NODE_SEQ_SIMPLE
;
node->
tag
|= is_user_type ?
CV_NODE_USER
:
0
;
return
ptr;
}
static
char
*
icvXMLParseTag
( CvFileStorage* fs,
char
* ptr, CvStringHashNode** _tag,
CvAttrList** _list,
int
* _tag_type )
{
int
tag_type =
0
;
CvStringHashNode* tagname =
0
;
CvAttrList *first =
0
, *last =
0
;
int
count =
0
, max_count =
4
;
int
attr_buf_size = (max_count*
2
+
1
)*
sizeof
(
char
*) +
sizeof
(CvAttrList);
char
* endptr;
char
c;
int
have_space;
if
( *ptr ==
'
\0
'
)
CV_PARSE_ERROR
(
"
Preliminary end of the stream
"
);
if
( *ptr !=
'
<
'
)
CV_PARSE_ERROR
(
"
Tag should start with
\'
<
\'
"
);
ptr++;
CV_PERSISTENCE_CHECK_END_OF_BUFFER_BUG
();
if
(
cv_isalnum
(*ptr) || *ptr ==
'
_
'
)
tag_type =
CV_XML_OPENING_TAG
;
else
if
( *ptr ==
'
/
'
)
{
tag_type =
CV_XML_CLOSING_TAG
;
ptr++;
}
else
if
( *ptr ==
'
?
'
)
{
tag_type =
CV_XML_HEADER_TAG
;
ptr++;
}
else
if
( *ptr ==
'
!
'
)
{
tag_type =
CV_XML_DIRECTIVE_TAG
;
assert
( ptr[
1
] !=
'
-
'
|| ptr[
2
] !=
'
-
'
);
ptr++;
}
else
CV_PARSE_ERROR
(
"
Unknown tag type
"
);
for
(;;)
{
CvStringHashNode* attrname;
if
( !
cv_isalpha
(*ptr) && *ptr !=
'
_
'
)
CV_PARSE_ERROR
(
"
Name should start with a letter or underscore
"
);
endptr = ptr -
1
;
do
c = *++endptr;
while
(
cv_isalnum
(c) || c ==
'
_
'
|| c ==
'
-
'
);
attrname =
cvGetHashedKey
( fs, ptr, (
int
)(endptr - ptr),
1
);
CV_Assert
(attrname);
ptr = endptr;
CV_PERSISTENCE_CHECK_END_OF_BUFFER_BUG
();
if
( !tagname )
tagname = attrname;
else
{
if
( tag_type ==
CV_XML_CLOSING_TAG
)
CV_PARSE_ERROR
(
"
Closing tag should not contain any attributes
"
);
if
( !last || count >= max_count )
{
CvAttrList* chunk;
chunk = (CvAttrList*)
cvMemStorageAlloc
( fs->
memstorage
, attr_buf_size );
memset
( chunk,
0
, attr_buf_size );
chunk->
attr
= (
const
char
**)(chunk +
1
);
count =
0
;
if
( !last )
first = last = chunk;
else
last = last->
next
= chunk;
}
last->
attr
[count*
2
] = attrname->
str
.
ptr
;
}
if
( last )
{
CvFileNode stub;
if
( *ptr !=
'
=
'
)
{
ptr =
icvXMLSkipSpaces
( fs, ptr,
CV_XML_INSIDE_TAG
);
if
( *ptr !=
'
=
'
)
CV_PARSE_ERROR
(
"
Attribute name should be followed by
\'
=
\'
"
);
}
c = *++ptr;
if
( c !=
'
\"
'
&& c !=
'
\'
'
)
{
ptr =
icvXMLSkipSpaces
( fs, ptr,
CV_XML_INSIDE_TAG
);
if
( *ptr !=
'
\"
'
&& *ptr !=
'
\'
'
)
CV_PARSE_ERROR
(
"
Attribute value should be put into single or double quotes
"
);
}
ptr =
icvXMLParseValue
( fs, ptr, &stub,
CV_NODE_STRING
);
assert
( stub.
tag
==
CV_NODE_STRING
);
last->
attr
[count*
2
+
1
] = stub.
data
.
str
.
ptr
;
count++;
}
c = *ptr;
have_space =
cv_isspace
(c) || c ==
'
\0
'
;
if
( c !=
'
>
'
)
{
ptr =
icvXMLSkipSpaces
( fs, ptr,
CV_XML_INSIDE_TAG
);
c = *ptr;
}
if
( c ==
'
>
'
)
{
if
( tag_type ==
CV_XML_HEADER_TAG
)
CV_PARSE_ERROR
(
"
Invalid closing tag for <?xml ...
"
);
ptr++;
break
;
}
else
if
( c ==
'
?
'
&& tag_type ==
CV_XML_HEADER_TAG
)
{
if
( ptr[
1
] !=
'
>
'
)
//
FIXIT ptr[1] - out of bounds read without check
CV_PARSE_ERROR
(
"
Invalid closing tag for <?xml ...
"
);
ptr +=
2
;
break
;
}
else
if
( c ==
'
/
'
&& ptr[
1
] ==
'
>
'
&& tag_type ==
CV_XML_OPENING_TAG
)
//
FIXIT ptr[1] - out of bounds read without check
{
tag_type =
CV_XML_EMPTY_TAG
;
ptr +=
2
;
break
;
}
if
( !have_space )
CV_PARSE_ERROR
(
"
There should be space between attributes
"
);
}
*_tag = tagname;
*_tag_type = tag_type;
*_list = first;
return
ptr;
}
void
icvXMLParse
( CvFileStorage* fs )
{
char
* ptr = fs->
buffer_start
;
CvStringHashNode *key =
0
, *key2 =
0
;
CvAttrList* list =
0
;
int
tag_type =
0
;
//
CV_XML_INSIDE_TAG is used to prohibit leading comments
ptr =
icvXMLSkipSpaces
( fs, ptr,
CV_XML_INSIDE_TAG
);
if
(
memcmp
( ptr,
"
<?xml
"
,
5
) !=
0
)
//
FIXIT ptr[1..] - out of bounds read without check
CV_PARSE_ERROR
(
"
Valid XML should start with
\'
<?xml ...?>
\'
"
);
ptr =
icvXMLParseTag
( fs, ptr, &key, &list, &tag_type );
/*
{
const char* version = cvAttrValue( list, "version" );
if( version && strncmp( version, "1.", 2 ) != 0 )
CV_Error( CV_StsParseError, "Unsupported version of XML" );
}
*/
//
we support any 8-bit encoding, so we do not need to check the actual encoding.
//
we do not support utf-16, but in the case of utf-16 we will not get here anyway.
/*
{
const char* encoding = cvAttrValue( list, "encoding" );
if( encoding && strcmp( encoding, "ASCII" ) != 0 &&
strcmp( encoding, "UTF-8" ) != 0 &&
strcmp( encoding, "utf-8" ) != 0 )
CV_PARSE_ERROR( "Unsupported encoding" );
}
*/
while
( *ptr !=
'
\0
'
)
{
ptr =
icvXMLSkipSpaces
( fs, ptr,
0
);
if
( *ptr !=
'
\0
'
)
{
CvFileNode* root_node;
ptr =
icvXMLParseTag
( fs, ptr, &key, &list, &tag_type );
if
( tag_type !=
CV_XML_OPENING_TAG
||
!key ||
strcmp
(key->
str
.
ptr
,
"
opencv_storage
"
) !=
0
)
CV_PARSE_ERROR
(
"
<opencv_storage> tag is missing
"
);
root_node = (CvFileNode*)
cvSeqPush
( fs->
roots
,
0
);
ptr =
icvXMLParseValue
( fs, ptr, root_node,
CV_NODE_NONE
);
ptr =
icvXMLParseTag
( fs, ptr, &key2, &list, &tag_type );
if
( tag_type !=
CV_XML_CLOSING_TAG
|| key != key2 )
CV_PARSE_ERROR
(
"
</opencv_storage> tag is missing
"
);
ptr =
icvXMLSkipSpaces
( fs, ptr,
0
);
}
}
CV_Assert
( fs->
dummy_eof
!=
0
);
}
/*
***************************************************************************************\
* XML Emitter *
\***************************************************************************************
*/
#
define
icvXMLFlush
icvFSFlush
static
void
icvXMLWriteTag
( CvFileStorage* fs,
const
char
* key,
int
tag_type, CvAttrList list )
{
char
* ptr = fs->
buffer
;
int
i, len =
0
;
int
struct_flags = fs->
struct_flags
;
if
( key && key[
0
] ==
'
\0
'
)
key =
0
;
if
( tag_type ==
CV_XML_OPENING_TAG
|| tag_type ==
CV_XML_EMPTY_TAG
)
{
if
(
CV_NODE_IS_COLLECTION
(struct_flags) )
{
if
(
CV_NODE_IS_MAP
(struct_flags) ^ (key !=
0
) )
CV_Error
( CV_StsBadArg,
"
An attempt to add element without a key to a map,
"
"
or add element with key to sequence
"
);
}
else
{
struct_flags =
CV_NODE_EMPTY
+ (key ?
CV_NODE_MAP
:
CV_NODE_SEQ
);
fs->
is_first
=
0
;
}
if
( !
CV_NODE_IS_EMPTY
(struct_flags) )
ptr =
icvXMLFlush
(fs);
}
if
( !key )
key =
"
_
"
;
else
if
( key[
0
] ==
'
_
'
&& key[
1
] ==
'
\0
'
)
CV_Error
( CV_StsBadArg,
"
A single _ is a reserved tag name
"
);
len = (
int
)
strlen
( key );
*ptr++ =
'
<
'
;
if
( tag_type ==
CV_XML_CLOSING_TAG
)
{
if
( list.
attr
)
CV_Error
( CV_StsBadArg,
"
Closing tag should not include any attributes
"
);
*ptr++ =
'
/
'
;
}
if
( !
cv_isalpha
(key[
0
]) && key[
0
] !=
'
_
'
)
CV_Error
( CV_StsBadArg,
"
Key should start with a letter or _
"
);
ptr =
icvFSResizeWriteBuffer
( fs, ptr, len );
for
( i =
0
; i < len; i++ )
{
char
c = key[i];
if
( !
cv_isalnum
(c) && c !=
'
_
'
&& c !=
'
-
'
)
CV_Error
( CV_StsBadArg,
"
Key name may only contain alphanumeric characters [a-zA-Z0-9], '-' and '_'
"
);
ptr[i] = c;
}
ptr += len;
for
(;;)
{
const
char
** attr = list.
attr
;
for
( ; attr && attr[
0
] !=
0
; attr +=
2
)
{
int
len0 = (
int
)
strlen
(attr[
0
]);
int
len1 = (
int
)
strlen
(attr[
1
]);
ptr =
icvFSResizeWriteBuffer
( fs, ptr, len0 + len1 +
4
);
*ptr++ =
'
'
;
memcpy
( ptr, attr[
0
], len0 );
ptr += len0;
*ptr++ =
'
=
'
;
*ptr++ =
'
\"
'
;
memcpy
( ptr, attr[
1
], len1 );
ptr += len1;
*ptr++ =
'
\"
'
;
}
if
( !list.
next
)
break
;
list = *list.
next
;
}
if
( tag_type ==
CV_XML_EMPTY_TAG
)
*ptr++ =
'
/
'
;
*ptr++ =
'
>
'
;
fs->
buffer
= ptr;
fs->
struct_flags
= struct_flags & ~
CV_NODE_EMPTY
;
}
void
icvXMLStartWriteStruct
( CvFileStorage* fs,
const
char
* key,
int
struct_flags,
const
char
* type_name)
{
CvXMLStackRecord parent;
const
char
* attr[
10
];
int
idx =
0
;
struct_flags = (struct_flags & (
CV_NODE_TYPE_MASK
|
CV_NODE_FLOW
)) |
CV_NODE_EMPTY
;
if
( !
CV_NODE_IS_COLLECTION
(struct_flags))
CV_Error
( CV_StsBadArg,
"
Some collection type: CV_NODE_SEQ or CV_NODE_MAP must be specified
"
);
if
( type_name && *type_name ==
'
\0
'
)
type_name =
0
;
if
( type_name )
{
attr[idx++] =
"
type_id
"
;
attr[idx++] = type_name;
}
attr[idx++] =
0
;
icvXMLWriteTag
( fs, key,
CV_XML_OPENING_TAG
,
cvAttrList
(attr,
0
) );
parent.
struct_flags
= fs->
struct_flags
& ~
CV_NODE_EMPTY
;
parent.
struct_indent
= fs->
struct_indent
;
parent.
struct_tag
= fs->
struct_tag
;
cvSaveMemStoragePos
( fs->
strstorage
, &parent.
pos
);
cvSeqPush
( fs->
write_stack
, &parent );
fs->
struct_indent
+=
CV_XML_INDENT
;
if
( !
CV_NODE_IS_FLOW
(struct_flags) )
icvXMLFlush
( fs );
fs->
struct_flags
= struct_flags;
if
( key )
{
fs->
struct_tag
=
cvMemStorageAllocString
( fs->
strstorage
, (
char
*)key, -
1
);
}
else
{
fs->
struct_tag
.
ptr
=
0
;
fs->
struct_tag
.
len
=
0
;
}
}
void
icvXMLEndWriteStruct
( CvFileStorage* fs )
{
CvXMLStackRecord parent;
if
( fs->
write_stack
->
total
==
0
)
CV_Error
( CV_StsError,
"
An extra closing tag
"
);
icvXMLWriteTag
( fs, fs->
struct_tag
.
ptr
,
CV_XML_CLOSING_TAG
,
cvAttrList
(
0
,
0
) );
cvSeqPop
( fs->
write_stack
, &parent );
fs->
struct_indent
= parent.
struct_indent
;
fs->
struct_flags
= parent.
struct_flags
;
fs->
struct_tag
= parent.
struct_tag
;
cvRestoreMemStoragePos
( fs->
strstorage
, &parent.
pos
);
}
void
icvXMLStartNextStream
( CvFileStorage* fs )
{
if
( !fs->
is_first
)
{
while
( fs->
write_stack
->
total
>
0
)
icvXMLEndWriteStruct
(fs);
fs->
struct_indent
=
0
;
icvXMLFlush
(fs);
/*
XML does not allow multiple top-level elements,
so we just put a comment and continue
the current (and the only) "stream"
*/
icvPuts
( fs,
"
\n
<!-- next stream -->
\n
"
);
/*
fputs( "</opencv_storage>\n", fs->file );
fputs( "<opencv_storage>\n", fs->file );
*/
fs->
buffer
= fs->
buffer_start
;
}
}
void
icvXMLWriteScalar
( CvFileStorage* fs,
const
char
* key,
const
char
* data,
int
len )
{
check_if_write_struct_is_delayed
( fs );
if
( fs->
state_of_writing_base64
== base64::fs::Uncertain )
{
switch_to_Base64_state
( fs, base64::fs::NotUse );
}
else
if
( fs->
state_of_writing_base64
== base64::fs::InUse )
{
CV_Error
( CV_StsError,
"
Currently only Base64 data is allowed.
"
);
}
if
(
CV_NODE_IS_MAP
(fs->
struct_flags
) ||
(!
CV_NODE_IS_COLLECTION
(fs->
struct_flags
) && key) )
{
icvXMLWriteTag
( fs, key,
CV_XML_OPENING_TAG
,
cvAttrList
(
0
,
0
) );
char
* ptr =
icvFSResizeWriteBuffer
( fs, fs->
buffer
, len );
memcpy
( ptr, data, len );
fs->
buffer
= ptr + len;
icvXMLWriteTag
( fs, key,
CV_XML_CLOSING_TAG
,
cvAttrList
(
0
,
0
) );
}
else
{
char
* ptr = fs->
buffer
;
int
new_offset = (
int
)(ptr - fs->
buffer_start
) + len;
if
( key )
CV_Error
( CV_StsBadArg,
"
elements with keys can not be written to sequence
"
);
fs->
struct_flags
=
CV_NODE_SEQ
;
if
( (new_offset > fs->
wrap_margin
&& new_offset - fs->
struct_indent
>
10
) ||
(ptr > fs->
buffer_start
&& ptr[-
1
] ==
'
>
'
&& !
CV_NODE_IS_EMPTY
(fs->
struct_flags
)) )
{
ptr =
icvXMLFlush
(fs);
}
else
if
( ptr > fs->
buffer_start
+ fs->
struct_indent
&& ptr[-
1
] !=
'
>
'
)
*ptr++ =
'
'
;
memcpy
( ptr, data, len );
fs->
buffer
= ptr + len;
}
}
void
icvXMLWriteInt
( CvFileStorage* fs,
const
char
* key,
int
value )
{
char
buf[
128
], *ptr =
icv_itoa
( value, buf,
10
);
int
len = (
int
)
strlen
(ptr);
icvXMLWriteScalar
( fs, key, ptr, len );
}
void
icvXMLWriteReal
( CvFileStorage* fs,
const
char
* key,
double
value )
{
char
buf[
128
];
int
len = (
int
)
strlen
(
icvDoubleToString
( buf, value ));
icvXMLWriteScalar
( fs, key, buf, len );
}
void
icvXMLWriteString
( CvFileStorage* fs,
const
char
* key,
const
char
* str,
int
quote )
{
char
buf[
CV_FS_MAX_LEN
*
6
+
16
];
char
* data = (
char
*)str;
int
i, len;
if
( !str )
CV_Error
( CV_StsNullPtr,
"
Null string pointer
"
);
len = (
int
)
strlen
(str);
if
( len >
CV_FS_MAX_LEN
)
CV_Error
( CV_StsBadArg,
"
The written string is too long
"
);
if
( quote || len ==
0
|| str[
0
] !=
'
\"
'
|| str[
0
] != str[len-
1
] )
{
int
need_quote = quote || len ==
0
;
data = buf;
*data++ =
'
\"
'
;
for
( i =
0
; i < len; i++ )
{
char
c = str[i];
if
( (uchar)c >=
128
|| c ==
'
'
)
{
*data++ = c;
need_quote =
1
;
}
else
if
( !
cv_isprint
(c) || c ==
'
<
'
|| c ==
'
>
'
|| c ==
'
&
'
|| c ==
'
\'
'
|| c ==
'
\"
'
)
{
*data++ =
'
&
'
;
if
( c ==
'
<
'
)
{
memcpy
(data,
"
lt
"
,
2
);
data +=
2
;
}
else
if
( c ==
'
>
'
)
{
memcpy
(data,
"
gt
"
,
2
);
data +=
2
;
}
else
if
( c ==
'
&
'
)
{
memcpy
(data,
"
amp
"
,
3
);
data +=
3
;
}
else
if
( c ==
'
\'
'
)
{
memcpy
(data,
"
apos
"
,
4
);
data +=
4
;
}
else
if
( c ==
'
\"
'
)
{
memcpy
( data,
"
quot
"
,
4
);
data +=
4
;
}
else
{
sprintf
( data,
"
#x%02x
"
, (uchar)c );
data +=
4
;
}
*data++ =
'
;
'
;
need_quote =
1
;
}
else
*data++ = c;
}
if
( !need_quote && (
cv_isdigit
(str[
0
]) ||
str[
0
] ==
'
+
'
|| str[
0
] ==
'
-
'
|| str[
0
] ==
'
.
'
))
need_quote =
1
;
if
( need_quote )
*data++ =
'
\"
'
;
len = (
int
)(data - buf) - !need_quote;
*data++ =
'
\0
'
;
data = buf + !need_quote;
}
icvXMLWriteScalar
( fs, key, data, len );
}
void
icvXMLWriteComment
( CvFileStorage* fs,
const
char
* comment,
int
eol_comment )
{
int
len;
int
multiline;
const
char
* eol;
char
* ptr;
if
( !comment )
CV_Error
( CV_StsNullPtr,
"
Null comment
"
);
if
(
strstr
(comment,
"
--
"
) !=
0
)
CV_Error
( CV_StsBadArg,
"
Double hyphen
\'
--
\'
is not allowed in the comments
"
);
len = (
int
)
strlen
(comment);
eol =
strchr
(comment,
'
\n
'
);
multiline = eol !=
0
;
ptr = fs->
buffer
;
if
( multiline || !eol_comment || fs->
buffer_end
- ptr < len +
5
)
ptr =
icvXMLFlush
( fs );
else
if
( ptr > fs->
buffer_start
+ fs->
struct_indent
)
*ptr++ =
'
'
;
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