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make xml_parse not be a template

This commit is contained in:
Arvid Norberg 2014-05-03 21:10:44 +00:00
parent 253e827c28
commit e5a9a6b36f
5 changed files with 227 additions and 180 deletions
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3
CMakeLists.txt
View File

@ -53,7 +53,6 @@ set(sources
socks5_stream socks5_stream
stat stat
storage storage
thread
time time
timestamp_history timestamp_history
torrent torrent
@ -77,6 +76,8 @@ set(sources
magnet_uri magnet_uri
parse_url parse_url
ConvertUTF ConvertUTF
thread
xml_parse
# -- extensions -- # -- extensions --
metadata_transfer metadata_transfer

1
Jamfile
View File

@ -590,6 +590,7 @@ SOURCES =
parse_url parse_url
ConvertUTF ConvertUTF
thread thread
xml_parse
# -- extensions -- # -- extensions --
metadata_transfer metadata_transfer

184
include/libtorrent/xml_parse.hpp
View File

@ -36,9 +36,12 @@ POSSIBILITY OF SUCH DAMAGE.
#include <cctype> #include <cctype>
#include <cstring> #include <cstring>
#include "libtorrent/config.hpp"
#include "libtorrent/assert.hpp" #include "libtorrent/assert.hpp"
#include "libtorrent/escape_string.hpp" #include "libtorrent/escape_string.hpp"
#include <boost/function.hpp>
namespace libtorrent namespace libtorrent
{ {
enum enum
@ -59,185 +62,8 @@ namespace libtorrent
// callback(int type, char const* name, char const* val) // callback(int type, char const* name, char const* val)
// str2 is only used for attributes. name is element or attribute // str2 is only used for attributes. name is element or attribute
// name and val is attribute value // name and val is attribute value
TORRENT_EXTRA_EXPORT void xml_parse(char* p, char* end
template <class CallbackType> , boost::function<void(int,char const*,char const*)> callback);
void xml_parse(char* p, char* end, CallbackType callback)
{
for(;p != end; ++p)
{
char const* start = p;
char const* val_start = 0;
int token;
// look for tag start
for(; p != end && *p != '<'; ++p);
if (p != start)
{
if (p != end)
{
TORRENT_ASSERT(*p == '<');
*p = 0;
}
token = xml_string;
callback(token, start, val_start);
if (p != end) *p = '<';
}
if (p == end) break;
// skip '<'
++p;
if (p != end && p+8 < end && string_begins_no_case("![CDATA[", p))
{
// CDATA. match '![CDATA['
p += 8;
start = p;
while (p != end && !string_begins_no_case("]]>", p-2)) ++p;
// parse error
if (p == end)
{
token = xml_parse_error;
start = "unexpected end of file";
callback(token, start, val_start);
break;
}
token = xml_string;
char tmp = p[-2];
p[-2] = 0;
callback(token, start, val_start);
p[-2] = tmp;
continue;
}
// parse the name of the tag.
for (start = p; p != end && *p != '>' && !is_space(*p); ++p);
char* tag_name_end = p;
// skip the attributes for now
for (; p != end && *p != '>'; ++p);
// parse error
if (p == end)
{
token = xml_parse_error;
start = "unexpected end of file";
callback(token, start, val_start);
break;
}
TORRENT_ASSERT(*p == '>');
// save the character that terminated the tag name
// it could be both '>' and ' '.
char save = *tag_name_end;
*tag_name_end = 0;
char* tag_end = p;
if (*start == '/')
{
++start;
token = xml_end_tag;
callback(token, start, val_start);
}
else if (*(p-1) == '/')
{
*(p-1) = 0;
token = xml_empty_tag;
callback(token, start, val_start);
*(p-1) = '/';
tag_end = p - 1;
}
else if (*start == '?' && *(p-1) == '?')
{
*(p-1) = 0;
++start;
token = xml_declaration_tag;
callback(token, start, val_start);
*(p-1) = '?';
tag_end = p - 1;
}
else if (start + 5 < p && std::memcmp(start, "!--", 3) == 0 && std::memcmp(p-2, "--", 2) == 0)
{
start += 3;
*(p-2) = 0;
token = xml_comment;
callback(token, start, val_start);
*(p-2) = '-';
tag_end = p - 2;
continue;
}
else
{
token = xml_start_tag;
callback(token, start, val_start);
}
*tag_name_end = save;
// parse attributes
for (char* i = tag_name_end; i < tag_end; ++i)
{
// find start of attribute name
for (; i != tag_end && is_space(*i); ++i);
if (i == tag_end) break;
start = i;
// find end of attribute name
for (; i != tag_end && *i != '=' && !is_space(*i); ++i);
char* name_end = i;
// look for equality sign
for (; i != tag_end && *i != '='; ++i);
// no equality sign found. Report this as xml_tag_content
// instead of a series of key value pairs
if (i == tag_end)
{
char tmp = *i;
*i = 0; // null terminate the content string
token = xml_tag_content;
val_start = 0;
callback(token, start, val_start);
*i = tmp;
break;
}
++i;
for (; i != tag_end && is_space(*i); ++i);
// check for parse error (values must be quoted)
if (i == tag_end || (*i != '\'' && *i != '\"'))
{
token = xml_parse_error;
val_start = 0;
start = "unquoted attribute value";
callback(token, start, val_start);
break;
}
char quote = *i;
++i;
val_start = i;
for (; i != tag_end && *i != quote; ++i);
// parse error (missing end quote)
if (i == tag_end)
{
token = xml_parse_error;
val_start = 0;
start = "missing end quote on attribute";
callback(token, start, val_start);
break;
}
save = *i;
*i = 0;
*name_end = 0;
token = xml_attribute;
callback(token, start, val_start);
*name_end = '=';
*i = save;
}
}
}
} }

1
src/Makefile.am
View File

@ -117,6 +117,7 @@ libtorrent_rasterbar_la_SOURCES = \
utp_socket_manager.cpp \ utp_socket_manager.cpp \
utp_stream.cpp \ utp_stream.cpp \
web_peer_connection.cpp \ web_peer_connection.cpp \
xml_parse.cpp \
\ \
$(KADEMLIA_SOURCES) \ $(KADEMLIA_SOURCES) \
$(GEOIP_SOURCES) \ $(GEOIP_SOURCES) \

218
src/xml_parse.cpp Normal file
View File

@ -0,0 +1,218 @@
/*
Copyright (c) 2007-2014, Arvid Norberg
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:
* Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in
the documentation and/or other materials provided with the distribution.
* Neither the name of the author nor the names of its
contributors may be used to endorse or promote products derived
from this software without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
POSSIBILITY OF SUCH DAMAGE.
*/
#include "libtorrent/xml_parse.hpp"
namespace libtorrent
{
TORRENT_EXTRA_EXPORT void xml_parse(char* p, char* end
, boost::function<void(int,char const*,char const*)> callback)
{
for(;p != end; ++p)
{
char const* start = p;
char const* val_start = 0;
int token;
// look for tag start
for(; p != end && *p != '<'; ++p);
if (p != start)
{
if (p != end)
{
TORRENT_ASSERT(*p == '<');
*p = 0;
}
token = xml_string;
callback(token, start, val_start);
if (p != end) *p = '<';
}
if (p == end) break;
// skip '<'
++p;
if (p != end && p+8 < end && string_begins_no_case("![CDATA[", p))
{
// CDATA. match '![CDATA['
p += 8;
start = p;
while (p != end && !string_begins_no_case("]]>", p-2)) ++p;
// parse error
if (p == end)
{
token = xml_parse_error;
start = "unexpected end of file";
callback(token, start, val_start);
break;
}
token = xml_string;
char tmp = p[-2];
p[-2] = 0;
callback(token, start, val_start);
p[-2] = tmp;
continue;
}
// parse the name of the tag.
for (start = p; p != end && *p != '>' && !is_space(*p); ++p);
char* tag_name_end = p;
// skip the attributes for now
for (; p != end && *p != '>'; ++p);
// parse error
if (p == end)
{
token = xml_parse_error;
start = "unexpected end of file";
callback(token, start, val_start);
break;
}
TORRENT_ASSERT(*p == '>');
// save the character that terminated the tag name
// it could be both '>' and ' '.
char save = *tag_name_end;
*tag_name_end = 0;
char* tag_end = p;
if (*start == '/')
{
++start;
token = xml_end_tag;
callback(token, start, val_start);
}
else if (*(p-1) == '/')
{
*(p-1) = 0;
token = xml_empty_tag;
callback(token, start, val_start);
*(p-1) = '/';
tag_end = p - 1;
}
else if (*start == '?' && *(p-1) == '?')
{
*(p-1) = 0;
++start;
token = xml_declaration_tag;
callback(token, start, val_start);
*(p-1) = '?';
tag_end = p - 1;
}
else if (start + 5 < p && std::memcmp(start, "!--", 3) == 0 && std::memcmp(p-2, "--", 2) == 0)
{
start += 3;
*(p-2) = 0;
token = xml_comment;
callback(token, start, val_start);
*(p-2) = '-';
tag_end = p - 2;
continue;
}
else
{
token = xml_start_tag;
callback(token, start, val_start);
}
*tag_name_end = save;
// parse attributes
for (char* i = tag_name_end; i < tag_end; ++i)
{
// find start of attribute name
for (; i != tag_end && is_space(*i); ++i);
if (i == tag_end) break;
start = i;
// find end of attribute name
for (; i != tag_end && *i != '=' && !is_space(*i); ++i);
char* name_end = i;
// look for equality sign
for (; i != tag_end && *i != '='; ++i);
// no equality sign found. Report this as xml_tag_content
// instead of a series of key value pairs
if (i == tag_end)
{
char tmp = *i;
*i = 0; // null terminate the content string
token = xml_tag_content;
val_start = 0;
callback(token, start, val_start);
*i = tmp;
break;
}
++i;
for (; i != tag_end && is_space(*i); ++i);
// check for parse error (values must be quoted)
if (i == tag_end || (*i != '\'' && *i != '\"'))
{
token = xml_parse_error;
val_start = 0;
start = "unquoted attribute value";
callback(token, start, val_start);
break;
}
char quote = *i;
++i;
val_start = i;
for (; i != tag_end && *i != quote; ++i);
// parse error (missing end quote)
if (i == tag_end)
{
token = xml_parse_error;
val_start = 0;
start = "missing end quote on attribute";
callback(token, start, val_start);
break;
}
save = *i;
*i = 0;
*name_end = 0;
token = xml_attribute;
callback(token, start, val_start);
*name_end = '=';
*i = save;
}
}
}
}