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Merged in EionRobb/security/EionRobb/fix-for-crash-when-sending-invalid-xml-e-1487474010880 (pull request #15)
release-2.x.y
2017-03-01, Gary Kramlich
e85451478ebe
Merged in EionRobb/security/EionRobb/fix-for-crash-when-sending-invalid-xml-e-1487474010880 (pull request #15)
Fix for crash when sending invalid xml entities separated by whitespace, eg " 3000;"
Approved-by: Gary Kramlich
Approved-by: dx
/**
* @file xmlnode.c XML DOM functions
*/
/* purple
*
* Purple is the legal property of its developers, whose names are too numerous
* to list here. Please refer to the COPYRIGHT file distributed with this
* source distribution.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02111-1301 USA
*/
/* A lot of this code at least resembles the code in libxode, but since
* libxode uses memory pools that we simply have no need for, I decided to
* write my own stuff. Also, re-writing this lets me be as lightweight
* as I want to be. Thank you libxode for giving me a good starting point */
#define _PURPLE_XMLNODE_C_
#include
"internal.h"
#include
"debug.h"
#include
<libxml/parser.h>
#include
<string.h>
#include
<glib.h>
#include
"dbus-maybe.h"
#include
"util.h"
#include
"xmlnode.h"
#ifdef _WIN32
# define NEWLINE_S "\r\n"
#else
# define NEWLINE_S "\n"
#endif
static
xmlnode
*
new_node
(
const
char
*
name
,
XMLNodeType
type
)
{
xmlnode
*
node
=
g_new0
(
xmlnode
,
1
);
node
->
name
=
g_strdup
(
name
);
node
->
type
=
type
;
PURPLE_DBUS_REGISTER_POINTER
(
node
,
xmlnode
);
return
node
;
}
xmlnode
*
xmlnode_new
(
const
char
*
name
)
{
g_return_val_if_fail
(
name
!=
NULL
&&
*
name
!=
'\0'
,
NULL
);
return
new_node
(
name
,
XMLNODE_TYPE_TAG
);
}
xmlnode
*
xmlnode_new_child
(
xmlnode
*
parent
,
const
char
*
name
)
{
xmlnode
*
node
;
g_return_val_if_fail
(
parent
!=
NULL
,
NULL
);
g_return_val_if_fail
(
name
!=
NULL
&&
*
name
!=
'\0'
,
NULL
);
node
=
new_node
(
name
,
XMLNODE_TYPE_TAG
);
xmlnode_insert_child
(
parent
,
node
);
return
node
;
}
void
xmlnode_insert_child
(
xmlnode
*
parent
,
xmlnode
*
child
)
{
g_return_if_fail
(
parent
!=
NULL
);
g_return_if_fail
(
child
!=
NULL
);
child
->
parent
=
parent
;
if
(
parent
->
lastchild
)
{
parent
->
lastchild
->
next
=
child
;
}
else
{
parent
->
child
=
child
;
}
parent
->
lastchild
=
child
;
}
void
xmlnode_insert_data
(
xmlnode
*
node
,
const
char
*
data
,
gssize
size
)
{
xmlnode
*
child
;
gsize
real_size
;
g_return_if_fail
(
node
!=
NULL
);
g_return_if_fail
(
data
!=
NULL
);
g_return_if_fail
(
size
!=
0
);
real_size
=
size
==
-1
?
strlen
(
data
)
:
(
gsize
)
size
;
child
=
new_node
(
NULL
,
XMLNODE_TYPE_DATA
);
child
->
data
=
g_memdup
(
data
,
real_size
);
child
->
data_sz
=
real_size
;
xmlnode_insert_child
(
node
,
child
);
}
void
xmlnode_remove_attrib
(
xmlnode
*
node
,
const
char
*
attr
)
{
xmlnode
*
attr_node
,
*
sibling
=
NULL
;
g_return_if_fail
(
node
!=
NULL
);
g_return_if_fail
(
attr
!=
NULL
);
attr_node
=
node
->
child
;
while
(
attr_node
)
{
if
(
attr_node
->
type
==
XMLNODE_TYPE_ATTRIB
&&
purple_strequal
(
attr_node
->
name
,
attr
))
{
if
(
node
->
lastchild
==
attr_node
)
{
node
->
lastchild
=
sibling
;
}
if
(
sibling
==
NULL
)
{
node
->
child
=
attr_node
->
next
;
xmlnode_free
(
attr_node
);
attr_node
=
node
->
child
;
}
else
{
sibling
->
next
=
attr_node
->
next
;
sibling
=
attr_node
->
next
;
xmlnode_free
(
attr_node
);
attr_node
=
sibling
;
}
}
else
{
attr_node
=
attr_node
->
next
;
}
sibling
=
attr_node
;
}
}
void
xmlnode_remove_attrib_with_namespace
(
xmlnode
*
node
,
const
char
*
attr
,
const
char
*
xmlns
)
{
xmlnode
*
attr_node
,
*
sibling
=
NULL
;
g_return_if_fail
(
node
!=
NULL
);
g_return_if_fail
(
attr
!=
NULL
);
for
(
attr_node
=
node
->
child
;
attr_node
;
attr_node
=
attr_node
->
next
)
{
if
(
attr_node
->
type
==
XMLNODE_TYPE_ATTRIB
&&
purple_strequal
(
attr
,
attr_node
->
name
)
&&
purple_strequal
(
xmlns
,
attr_node
->
xmlns
))
{
if
(
sibling
==
NULL
)
{
node
->
child
=
attr_node
->
next
;
}
else
{
sibling
->
next
=
attr_node
->
next
;
}
if
(
node
->
lastchild
==
attr_node
)
{
node
->
lastchild
=
sibling
;
}
xmlnode_free
(
attr_node
);
return
;
}
sibling
=
attr_node
;
}
}
void
xmlnode_set_attrib
(
xmlnode
*
node
,
const
char
*
attr
,
const
char
*
value
)
{
xmlnode_remove_attrib
(
node
,
attr
);
xmlnode_set_attrib_full
(
node
,
attr
,
NULL
,
NULL
,
value
);
}
void
xmlnode_set_attrib_with_namespace
(
xmlnode
*
node
,
const
char
*
attr
,
const
char
*
xmlns
,
const
char
*
value
)
{
xmlnode_set_attrib_full
(
node
,
attr
,
xmlns
,
NULL
,
value
);
}
void
xmlnode_set_attrib_with_prefix
(
xmlnode
*
node
,
const
char
*
attr
,
const
char
*
prefix
,
const
char
*
value
)
{
xmlnode_set_attrib_full
(
node
,
attr
,
NULL
,
prefix
,
value
);
}
void
xmlnode_set_attrib_full
(
xmlnode
*
node
,
const
char
*
attr
,
const
char
*
xmlns
,
const
char
*
prefix
,
const
char
*
value
)
{
xmlnode
*
attrib_node
;
g_return_if_fail
(
node
!=
NULL
);
g_return_if_fail
(
attr
!=
NULL
);
g_return_if_fail
(
value
!=
NULL
);
xmlnode_remove_attrib_with_namespace
(
node
,
attr
,
xmlns
);
attrib_node
=
new_node
(
attr
,
XMLNODE_TYPE_ATTRIB
);
attrib_node
->
data
=
g_strdup
(
value
);
attrib_node
->
xmlns
=
g_strdup
(
xmlns
);
attrib_node
->
prefix
=
g_strdup
(
prefix
);
xmlnode_insert_child
(
node
,
attrib_node
);
}
const
char
*
xmlnode_get_attrib
(
const
xmlnode
*
node
,
const
char
*
attr
)
{
xmlnode
*
x
;
g_return_val_if_fail
(
node
!=
NULL
,
NULL
);
g_return_val_if_fail
(
attr
!=
NULL
,
NULL
);
for
(
x
=
node
->
child
;
x
;
x
=
x
->
next
)
{
if
(
x
->
type
==
XMLNODE_TYPE_ATTRIB
&&
purple_strequal
(
attr
,
x
->
name
))
{
return
x
->
data
;
}
}
return
NULL
;
}
const
char
*
xmlnode_get_attrib_with_namespace
(
const
xmlnode
*
node
,
const
char
*
attr
,
const
char
*
xmlns
)
{
const
xmlnode
*
x
;
g_return_val_if_fail
(
node
!=
NULL
,
NULL
);
g_return_val_if_fail
(
attr
!=
NULL
,
NULL
);
for
(
x
=
node
->
child
;
x
;
x
=
x
->
next
)
{
if
(
x
->
type
==
XMLNODE_TYPE_ATTRIB
&&
purple_strequal
(
attr
,
x
->
name
)
&&
purple_strequal
(
xmlns
,
x
->
xmlns
))
{
return
x
->
data
;
}
}
return
NULL
;
}
void
xmlnode_set_namespace
(
xmlnode
*
node
,
const
char
*
xmlns
)
{
g_return_if_fail
(
node
!=
NULL
);
g_free
(
node
->
xmlns
);
node
->
xmlns
=
g_strdup
(
xmlns
);
}
const
char
*
xmlnode_get_namespace
(
xmlnode
*
node
)
{
g_return_val_if_fail
(
node
!=
NULL
,
NULL
);
return
node
->
xmlns
;
}
void
xmlnode_set_prefix
(
xmlnode
*
node
,
const
char
*
prefix
)
{
g_return_if_fail
(
node
!=
NULL
);
g_free
(
node
->
prefix
);
node
->
prefix
=
g_strdup
(
prefix
);
}
const
char
*
xmlnode_get_prefix
(
const
xmlnode
*
node
)
{
g_return_val_if_fail
(
node
!=
NULL
,
NULL
);
return
node
->
prefix
;
}
xmlnode
*
xmlnode_get_parent
(
const
xmlnode
*
child
)
{
g_return_val_if_fail
(
child
!=
NULL
,
NULL
);
return
child
->
parent
;
}
void
xmlnode_free
(
xmlnode
*
node
)
{
xmlnode
*
x
,
*
y
;
g_return_if_fail
(
node
!=
NULL
);
/* if we're part of a tree, remove ourselves from the tree first */
if
(
NULL
!=
node
->
parent
)
{
if
(
node
->
parent
->
child
==
node
)
{
node
->
parent
->
child
=
node
->
next
;
if
(
node
->
parent
->
lastchild
==
node
)
node
->
parent
->
lastchild
=
node
->
next
;
}
else
{
xmlnode
*
prev
=
node
->
parent
->
child
;
while
(
prev
&&
prev
->
next
!=
node
)
{
prev
=
prev
->
next
;
}
if
(
prev
)
{
prev
->
next
=
node
->
next
;
if
(
node
->
parent
->
lastchild
==
node
)
node
->
parent
->
lastchild
=
prev
;
}
}
}
/* now free our children */
x
=
node
->
child
;
while
(
x
)
{
y
=
x
->
next
;
xmlnode_free
(
x
);
x
=
y
;
}
/* now dispose of ourselves */
g_free
(
node
->
name
);
g_free
(
node
->
data
);
g_free
(
node
->
xmlns
);
g_free
(
node
->
prefix
);
if
(
node
->
namespace_map
)
g_hash_table_destroy
(
node
->
namespace_map
);
PURPLE_DBUS_UNREGISTER_POINTER
(
node
);
g_free
(
node
);
}
xmlnode
*
xmlnode_get_child
(
const
xmlnode
*
parent
,
const
char
*
name
)
{
return
xmlnode_get_child_with_namespace
(
parent
,
name
,
NULL
);
}
xmlnode
*
xmlnode_get_child_with_namespace
(
const
xmlnode
*
parent
,
const
char
*
name
,
const
char
*
ns
)
{
xmlnode
*
x
,
*
ret
=
NULL
;
char
**
names
;
char
*
parent_name
,
*
child_name
;
g_return_val_if_fail
(
parent
!=
NULL
,
NULL
);
g_return_val_if_fail
(
name
!=
NULL
,
NULL
);
names
=
g_strsplit
(
name
,
"/"
,
2
);
parent_name
=
names
[
0
];
child_name
=
names
[
1
];
for
(
x
=
parent
->
child
;
x
;
x
=
x
->
next
)
{
/* XXX: Is it correct to ignore the namespace for the match if none was specified? */
const
char
*
xmlns
=
NULL
;
if
(
ns
)
xmlns
=
xmlnode_get_namespace
(
x
);
if
(
x
->
type
==
XMLNODE_TYPE_TAG
&&
purple_strequal
(
parent_name
,
x
->
name
)
&&
purple_strequal
(
ns
,
xmlns
))
{
ret
=
x
;
break
;
}
}
if
(
child_name
&&
ret
)
ret
=
xmlnode_get_child
(
ret
,
child_name
);
g_strfreev
(
names
);
return
ret
;
}
char
*
xmlnode_get_data
(
const
xmlnode
*
node
)
{
GString
*
str
=
NULL
;
xmlnode
*
c
;
g_return_val_if_fail
(
node
!=
NULL
,
NULL
);
for
(
c
=
node
->
child
;
c
;
c
=
c
->
next
)
{
if
(
c
->
type
==
XMLNODE_TYPE_DATA
)
{
if
(
!
str
)
str
=
g_string_new_len
(
c
->
data
,
c
->
data_sz
);
else
str
=
g_string_append_len
(
str
,
c
->
data
,
c
->
data_sz
);
}
}
if
(
str
==
NULL
)
return
NULL
;
return
g_string_free
(
str
,
FALSE
);
}
char
*
xmlnode_get_data_unescaped
(
const
xmlnode
*
node
)
{
char
*
escaped
=
xmlnode_get_data
(
node
);
char
*
unescaped
=
escaped
?
purple_unescape_html
(
escaped
)
:
NULL
;
g_free
(
escaped
);
return
unescaped
;
}
static
void
xmlnode_to_str_foreach_append_ns
(
const
char
*
key
,
const
char
*
value
,
GString
*
buf
)
{
if
(
*
key
)
{
g_string_append_printf
(
buf
,
" xmlns:%s='%s'"
,
key
,
value
);
}
else
{
g_string_append_printf
(
buf
,
" xmlns='%s'"
,
value
);
}
}
static
char
*
xmlnode_to_str_helper
(
const
xmlnode
*
node
,
int
*
len
,
gboolean
formatting
,
int
depth
)
{
GString
*
text
=
g_string_new
(
""
);
const
char
*
prefix
;
const
xmlnode
*
c
;
char
*
node_name
,
*
esc
,
*
esc2
,
*
tab
=
NULL
;
gboolean
need_end
=
FALSE
,
pretty
=
formatting
;
g_return_val_if_fail
(
node
!=
NULL
,
NULL
);
if
(
pretty
&&
depth
)
{
tab
=
g_strnfill
(
depth
,
'\t'
);
text
=
g_string_append
(
text
,
tab
);
}
node_name
=
g_markup_escape_text
(
node
->
name
,
-1
);
prefix
=
xmlnode_get_prefix
(
node
);
if
(
prefix
)
{
g_string_append_printf
(
text
,
"<%s:%s"
,
prefix
,
node_name
);
}
else
{
g_string_append_printf
(
text
,
"<%s"
,
node_name
);
}
if
(
node
->
namespace_map
)
{
g_hash_table_foreach
(
node
->
namespace_map
,
(
GHFunc
)
xmlnode_to_str_foreach_append_ns
,
text
);
}
else
if
(
node
->
xmlns
)
{
if
(
!
node
->
parent
||
!
purple_strequal
(
node
->
xmlns
,
node
->
parent
->
xmlns
))
{
char
*
xmlns
=
g_markup_escape_text
(
node
->
xmlns
,
-1
);
g_string_append_printf
(
text
,
" xmlns='%s'"
,
xmlns
);
g_free
(
xmlns
);
}
}
for
(
c
=
node
->
child
;
c
;
c
=
c
->
next
)
{
if
(
c
->
type
==
XMLNODE_TYPE_ATTRIB
)
{
const
char
*
aprefix
=
xmlnode_get_prefix
(
c
);
esc
=
g_markup_escape_text
(
c
->
name
,
-1
);
esc2
=
g_markup_escape_text
(
c
->
data
,
-1
);
if
(
aprefix
)
{
g_string_append_printf
(
text
,
" %s:%s='%s'"
,
aprefix
,
esc
,
esc2
);
}
else
{
g_string_append_printf
(
text
,
" %s='%s'"
,
esc
,
esc2
);
}
g_free
(
esc
);
g_free
(
esc2
);
}
else
if
(
c
->
type
==
XMLNODE_TYPE_TAG
||
c
->
type
==
XMLNODE_TYPE_DATA
)
{
if
(
c
->
type
==
XMLNODE_TYPE_DATA
)
pretty
=
FALSE
;
need_end
=
TRUE
;
}
}
if
(
need_end
)
{
g_string_append_printf
(
text
,
">%s"
,
pretty
?
NEWLINE_S
:
""
);
for
(
c
=
node
->
child
;
c
;
c
=
c
->
next
)
{
if
(
c
->
type
==
XMLNODE_TYPE_TAG
)
{
int
esc_len
;
esc
=
xmlnode_to_str_helper
(
c
,
&
esc_len
,
pretty
,
depth
+
1
);
text
=
g_string_append_len
(
text
,
esc
,
esc_len
);
g_free
(
esc
);
}
else
if
(
c
->
type
==
XMLNODE_TYPE_DATA
&&
c
->
data_sz
>
0
)
{
esc
=
g_markup_escape_text
(
c
->
data
,
c
->
data_sz
);
text
=
g_string_append
(
text
,
esc
);
g_free
(
esc
);
}
}
if
(
tab
&&
pretty
)
text
=
g_string_append
(
text
,
tab
);
if
(
prefix
)
{
g_string_append_printf
(
text
,
"</%s:%s>%s"
,
prefix
,
node_name
,
formatting
?
NEWLINE_S
:
""
);
}
else
{
g_string_append_printf
(
text
,
"</%s>%s"
,
node_name
,
formatting
?
NEWLINE_S
:
""
);
}
}
else
{
g_string_append_printf
(
text
,
"/>%s"
,
formatting
?
NEWLINE_S
:
""
);
}
g_free
(
node_name
);
g_free
(
tab
);
if
(
len
)
*
len
=
text
->
len
;
return
g_string_free
(
text
,
FALSE
);
}
char
*
xmlnode_to_str
(
const
xmlnode
*
node
,
int
*
len
)
{
return
xmlnode_to_str_helper
(
node
,
len
,
FALSE
,
0
);
}
char
*
xmlnode_to_formatted_str
(
const
xmlnode
*
node
,
int
*
len
)
{
char
*
xml
,
*
xml_with_declaration
;
g_return_val_if_fail
(
node
!=
NULL
,
NULL
);
xml
=
xmlnode_to_str_helper
(
node
,
len
,
TRUE
,
0
);
xml_with_declaration
=
g_strdup_printf
(
"<?xml version='1.0' encoding='UTF-8' ?>"
NEWLINE_S
NEWLINE_S
"%s"
,
xml
);
g_free
(
xml
);
if
(
len
)
*
len
+=
sizeof
(
"<?xml version='1.0' encoding='UTF-8' ?>"
NEWLINE_S
NEWLINE_S
)
-
1
;
return
xml_with_declaration
;
}
struct
_xmlnode_parser_data
{
xmlnode
*
current
;
gboolean
error
;
};
static
void
xmlnode_parser_element_start_libxml
(
void
*
user_data
,
const
xmlChar
*
element_name
,
const
xmlChar
*
prefix
,
const
xmlChar
*
xmlns
,
int
nb_namespaces
,
const
xmlChar
**
namespaces
,
int
nb_attributes
,
int
nb_defaulted
,
const
xmlChar
**
attributes
)
{
struct
_xmlnode_parser_data
*
xpd
=
user_data
;
xmlnode
*
node
;
int
i
,
j
;
if
(
!
element_name
||
xpd
->
error
)
{
return
;
}
else
{
if
(
xpd
->
current
)
node
=
xmlnode_new_child
(
xpd
->
current
,
(
const
char
*
)
element_name
);
else
node
=
xmlnode_new
((
const
char
*
)
element_name
);
xmlnode_set_namespace
(
node
,
(
const
char
*
)
xmlns
);
xmlnode_set_prefix
(
node
,
(
const
char
*
)
prefix
);
if
(
nb_namespaces
!=
0
)
{
node
->
namespace_map
=
g_hash_table_new_full
(
g_str_hash
,
g_str_equal
,
g_free
,
g_free
);
for
(
i
=
0
,
j
=
0
;
i
<
nb_namespaces
;
i
++
,
j
+=
2
)
{
const
char
*
key
=
(
const
char
*
)
namespaces
[
j
];
const
char
*
val
=
(
const
char
*
)
namespaces
[
j
+
1
];
g_hash_table_insert
(
node
->
namespace_map
,
g_strdup
(
key
?
key
:
""
),
g_strdup
(
val
?
val
:
""
));
}
}
for
(
i
=
0
;
i
<
nb_attributes
*
5
;
i
+=
5
)
{
const
char
*
name
=
(
const
char
*
)
attributes
[
i
];
const
char
*
prefix
=
(
const
char
*
)
attributes
[
i
+
1
];
char
*
txt
;
int
attrib_len
=
attributes
[
i
+
4
]
-
attributes
[
i
+
3
];
char
*
attrib
=
g_strndup
((
const
char
*
)
attributes
[
i
+
3
],
attrib_len
);
txt
=
attrib
;
attrib
=
purple_unescape_text
(
txt
);
g_free
(
txt
);
xmlnode_set_attrib_full
(
node
,
name
,
NULL
,
prefix
,
attrib
);
g_free
(
attrib
);
}
xpd
->
current
=
node
;
}
}
static
void
xmlnode_parser_element_end_libxml
(
void
*
user_data
,
const
xmlChar
*
element_name
,
const
xmlChar
*
prefix
,
const
xmlChar
*
xmlns
)
{
struct
_xmlnode_parser_data
*
xpd
=
user_data
;
if
(
!
element_name
||
!
xpd
->
current
||
xpd
->
error
)
return
;
if
(
xpd
->
current
->
parent
)
{
if
(
!
xmlStrcmp
((
xmlChar
*
)
xpd
->
current
->
name
,
element_name
))
xpd
->
current
=
xpd
->
current
->
parent
;
}
}
static
void
xmlnode_parser_element_text_libxml
(
void
*
user_data
,
const
xmlChar
*
text
,
int
text_len
)
{
struct
_xmlnode_parser_data
*
xpd
=
user_data
;
if
(
!
xpd
->
current
||
xpd
->
error
)
return
;
if
(
!
text
||
!
text_len
)
return
;
xmlnode_insert_data
(
xpd
->
current
,
(
const
char
*
)
text
,
text_len
);
}
static
void
xmlnode_parser_error_libxml
(
void
*
user_data
,
const
char
*
msg
,
...)
{
struct
_xmlnode_parser_data
*
xpd
=
user_data
;
char
errmsg
[
2048
];
va_list
args
;
xpd
->
error
=
TRUE
;
va_start
(
args
,
msg
);
vsnprintf
(
errmsg
,
sizeof
(
errmsg
),
msg
,
args
);
va_end
(
args
);
purple_debug_error
(
"xmlnode"
,
"Error parsing xml file: %s"
,
errmsg
);
}
static
void
xmlnode_parser_structural_error_libxml
(
void
*
user_data
,
xmlErrorPtr
error
)
{
struct
_xmlnode_parser_data
*
xpd
=
user_data
;
if
(
error
&&
(
error
->
level
==
XML_ERR_ERROR
||
error
->
level
==
XML_ERR_FATAL
))
{
xpd
->
error
=
TRUE
;
purple_debug_error
(
"xmlnode"
,
"XML parser error for xmlnode %p: "
"Domain %i, code %i, level %i: %s"
,
user_data
,
error
->
domain
,
error
->
code
,
error
->
level
,
error
->
message
?
error
->
message
:
"(null)
\n
"
);
}
else
if
(
error
)
purple_debug_warning
(
"xmlnode"
,
"XML parser error for xmlnode %p: "
"Domain %i, code %i, level %i: %s"
,
user_data
,
error
->
domain
,
error
->
code
,
error
->
level
,
error
->
message
?
error
->
message
:
"(null)
\n
"
);
else
purple_debug_warning
(
"xmlnode"
,
"XML parser error for xmlnode %p
\n
"
,
user_data
);
}
static
xmlSAXHandler
xmlnode_parser_libxml
=
{
NULL
,
/* internalSubset */
NULL
,
/* isStandalone */
NULL
,
/* hasInternalSubset */
NULL
,
/* hasExternalSubset */
NULL
,
/* resolveEntity */
NULL
,
/* getEntity */
NULL
,
/* entityDecl */
NULL
,
/* notationDecl */
NULL
,
/* attributeDecl */
NULL
,
/* elementDecl */
NULL
,
/* unparsedEntityDecl */
NULL
,
/* setDocumentLocator */
NULL
,
/* startDocument */
NULL
,
/* endDocument */
NULL
,
/* startElement */
NULL
,
/* endElement */
NULL
,
/* reference */
xmlnode_parser_element_text_libxml
,
/* characters */
NULL
,
/* ignorableWhitespace */
NULL
,
/* processingInstruction */
NULL
,
/* comment */
NULL
,
/* warning */
xmlnode_parser_error_libxml
,
/* error */
NULL
,
/* fatalError */
NULL
,
/* getParameterEntity */
NULL
,
/* cdataBlock */
NULL
,
/* externalSubset */
XML_SAX2_MAGIC
,
/* initialized */
NULL
,
/* _private */
xmlnode_parser_element_start_libxml
,
/* startElementNs */
xmlnode_parser_element_end_libxml
,
/* endElementNs */
xmlnode_parser_structural_error_libxml
,
/* serror */
};
xmlnode
*
xmlnode_from_str
(
const
char
*
str
,
gssize
size
)
{
struct
_xmlnode_parser_data
*
xpd
;
xmlnode
*
ret
;
gsize
real_size
;
g_return_val_if_fail
(
str
!=
NULL
,
NULL
);
real_size
=
size
<
0
?
strlen
(
str
)
:
(
gsize
)
size
;
xpd
=
g_new0
(
struct
_xmlnode_parser_data
,
1
);
if
(
xmlSAXUserParseMemory
(
&
xmlnode_parser_libxml
,
xpd
,
str
,
real_size
)
<
0
)
{
while
(
xpd
->
current
&&
xpd
->
current
->
parent
)
xpd
->
current
=
xpd
->
current
->
parent
;
if
(
xpd
->
current
)
xmlnode_free
(
xpd
->
current
);
xpd
->
current
=
NULL
;
}
ret
=
xpd
->
current
;
if
(
xpd
->
error
)
{
ret
=
NULL
;
if
(
xpd
->
current
)
xmlnode_free
(
xpd
->
current
);
}
g_free
(
xpd
);
return
ret
;
}
xmlnode
*
xmlnode_from_file
(
const
char
*
dir
,
const
char
*
filename
,
const
char
*
description
,
const
char
*
process
)
{
gchar
*
filename_full
;
GError
*
error
=
NULL
;
gchar
*
contents
=
NULL
;
gsize
length
;
xmlnode
*
node
=
NULL
;
g_return_val_if_fail
(
dir
!=
NULL
,
NULL
);
purple_debug_info
(
process
,
"Reading file %s from directory %s
\n
"
,
filename
,
dir
);
filename_full
=
g_build_filename
(
dir
,
filename
,
NULL
);
if
(
!
g_file_test
(
filename_full
,
G_FILE_TEST_EXISTS
))
{
purple_debug_info
(
process
,
"File %s does not exist (this is not "
"necessarily an error)
\n
"
,
filename_full
);
g_free
(
filename_full
);
return
NULL
;
}
if
(
!
g_file_get_contents
(
filename_full
,
&
contents
,
&
length
,
&
error
))
{
purple_debug_error
(
process
,
"Error reading file %s: %s
\n
"
,
filename_full
,
error
->
message
);
g_error_free
(
error
);
}
if
((
contents
!=
NULL
)
&&
(
length
>
0
))
{
node
=
xmlnode_from_str
(
contents
,
length
);
/* If we were unable to parse the file then save its contents to a backup file */
if
(
node
==
NULL
)
{
gchar
*
filename_temp
,
*
filename_temp_full
;
filename_temp
=
g_strdup_printf
(
"%s~"
,
filename
);
filename_temp_full
=
g_build_filename
(
dir
,
filename_temp
,
NULL
);
purple_debug_error
(
"util"
,
"Error parsing file %s. Renaming old "
"file to %s
\n
"
,
filename_full
,
filename_temp
);
purple_util_write_data_to_file_absolute
(
filename_temp_full
,
contents
,
length
);
g_free
(
filename_temp_full
);
g_free
(
filename_temp
);
}
g_free
(
contents
);
}
/* If we could not parse the file then show the user an error message */
if
(
node
==
NULL
)
{
gchar
*
title
,
*
msg
;
title
=
g_strdup_printf
(
_
(
"Error Reading %s"
),
filename
);
msg
=
g_strdup_printf
(
_
(
"An error was encountered reading your "
"%s. The file has not been loaded, and the old file "
"has been renamed to %s~."
),
description
,
filename_full
);
purple_notify_error
(
NULL
,
NULL
,
title
,
msg
);
g_free
(
title
);
g_free
(
msg
);
}
g_free
(
filename_full
);
return
node
;
}
static
void
xmlnode_copy_foreach_ns
(
gpointer
key
,
gpointer
value
,
gpointer
user_data
)
{
GHashTable
*
ret
=
(
GHashTable
*
)
user_data
;
g_hash_table_insert
(
ret
,
g_strdup
(
key
),
g_strdup
(
value
));
}
xmlnode
*
xmlnode_copy
(
const
xmlnode
*
src
)
{
xmlnode
*
ret
;
xmlnode
*
child
;
xmlnode
*
sibling
=
NULL
;
g_return_val_if_fail
(
src
!=
NULL
,
NULL
);
ret
=
new_node
(
src
->
name
,
src
->
type
);
ret
->
xmlns
=
g_strdup
(
src
->
xmlns
);
if
(
src
->
data
)
{
if
(
src
->
data_sz
)
{
ret
->
data
=
g_memdup
(
src
->
data
,
src
->
data_sz
);
ret
->
data_sz
=
src
->
data_sz
;
}
else
{
ret
->
data
=
g_strdup
(
src
->
data
);
}
}
ret
->
prefix
=
g_strdup
(
src
->
prefix
);
if
(
src
->
namespace_map
)
{
ret
->
namespace_map
=
g_hash_table_new_full
(
g_str_hash
,
g_str_equal
,
g_free
,
g_free
);
g_hash_table_foreach
(
src
->
namespace_map
,
xmlnode_copy_foreach_ns
,
ret
->
namespace_map
);
}
for
(
child
=
src
->
child
;
child
;
child
=
child
->
next
)
{
if
(
sibling
)
{
sibling
->
next
=
xmlnode_copy
(
child
);
sibling
=
sibling
->
next
;
}
else
{
ret
->
child
=
sibling
=
xmlnode_copy
(
child
);
}
sibling
->
parent
=
ret
;
}
ret
->
lastchild
=
sibling
;
return
ret
;
}
xmlnode
*
xmlnode_get_next_twin
(
xmlnode
*
node
)
{
xmlnode
*
sibling
;
const
char
*
ns
=
xmlnode_get_namespace
(
node
);
g_return_val_if_fail
(
node
!=
NULL
,
NULL
);
g_return_val_if_fail
(
node
->
type
==
XMLNODE_TYPE_TAG
,
NULL
);
for
(
sibling
=
node
->
next
;
sibling
;
sibling
=
sibling
->
next
)
{
/* XXX: Is it correct to ignore the namespace for the match if none was specified? */
const
char
*
xmlns
=
NULL
;
if
(
ns
)
xmlns
=
xmlnode_get_namespace
(
sibling
);
if
(
sibling
->
type
==
XMLNODE_TYPE_TAG
&&
purple_strequal
(
node
->
name
,
sibling
->
name
)
&&
purple_strequal
(
ns
,
xmlns
))
return
sibling
;
}
return
NULL
;
}