1 /*
2 * libjingle
3 * Copyright 2004--2005, Google Inc.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are met:
7 *
8 * 1. Redistributions of source code must retain the above copyright notice,
9 * this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright notice,
11 * this list of conditions and the following disclaimer in the documentation
12 * and/or other materials provided with the distribution.
13 * 3. The name of the author may not be used to endorse or promote products
14 * derived from this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
17 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
18 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
19 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
20 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
21 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
22 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
23 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
24 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
25 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 */
27
28 #include <vector>
29 #include <set>
30 #include "talk/base/common.h"
31 #include "talk/xmllite/xmlelement.h"
32 #include "talk/xmllite/xmlbuilder.h"
33 #ifdef EXPAT_RELATIVE_PATH
34 #include "lib/expat.h"
35 #else
36 #include "third_party/expat/v2_0_1/Source/lib/expat.h"
37 #endif // EXPAT_RELATIVE_PATH
38
39 namespace buzz {
40
XmlBuilder()41 XmlBuilder::XmlBuilder() :
42 pelCurrent_(NULL),
43 pelRoot_(NULL),
44 pvParents_(new std::vector<XmlElement *>()) {
45 }
46
47 void
Reset()48 XmlBuilder::Reset() {
49 pelRoot_.reset();
50 pelCurrent_ = NULL;
51 pvParents_->clear();
52 }
53
54 XmlElement *
BuildElement(XmlParseContext * pctx,const char * name,const char ** atts)55 XmlBuilder::BuildElement(XmlParseContext * pctx,
56 const char * name, const char ** atts) {
57 QName tagName(pctx->ResolveQName(name, false));
58 if (tagName == QN_EMPTY)
59 return NULL;
60
61 XmlElement * pelNew = new XmlElement(tagName);
62
63 if (!*atts)
64 return pelNew;
65
66 std::set<QName> seenNonlocalAtts;
67
68 while (*atts) {
69 QName attName(pctx->ResolveQName(*atts, true));
70 if (attName == QN_EMPTY) {
71 delete pelNew;
72 return NULL;
73 }
74
75 // verify that namespaced names are unique
76 if (!attName.Namespace().empty()) {
77 if (seenNonlocalAtts.count(attName)) {
78 delete pelNew;
79 return NULL;
80 }
81 seenNonlocalAtts.insert(attName);
82 }
83
84 pelNew->AddAttr(attName, std::string(*(atts + 1)));
85 atts += 2;
86 }
87
88 return pelNew;
89 }
90
91 void
StartElement(XmlParseContext * pctx,const char * name,const char ** atts)92 XmlBuilder::StartElement(XmlParseContext * pctx,
93 const char * name, const char ** atts) {
94 XmlElement * pelNew = BuildElement(pctx, name, atts);
95 if (pelNew == NULL) {
96 pctx->RaiseError(XML_ERROR_SYNTAX);
97 return;
98 }
99
100 if (!pelCurrent_) {
101 pelCurrent_ = pelNew;
102 pelRoot_.reset(pelNew);
103 pvParents_->push_back(NULL);
104 } else {
105 pelCurrent_->AddElement(pelNew);
106 pvParents_->push_back(pelCurrent_);
107 pelCurrent_ = pelNew;
108 }
109 }
110
111 void
EndElement(XmlParseContext * pctx,const char * name)112 XmlBuilder::EndElement(XmlParseContext * pctx, const char * name) {
113 UNUSED(pctx);
114 UNUSED(name);
115 pelCurrent_ = pvParents_->back();
116 pvParents_->pop_back();
117 }
118
119 void
CharacterData(XmlParseContext * pctx,const char * text,int len)120 XmlBuilder::CharacterData(XmlParseContext * pctx,
121 const char * text, int len) {
122 UNUSED(pctx);
123 if (pelCurrent_) {
124 pelCurrent_->AddParsedText(text, len);
125 }
126 }
127
128 void
Error(XmlParseContext * pctx,XML_Error err)129 XmlBuilder::Error(XmlParseContext * pctx, XML_Error err) {
130 UNUSED(pctx);
131 UNUSED(err);
132 pelRoot_.reset(NULL);
133 pelCurrent_ = NULL;
134 pvParents_->clear();
135 }
136
137 XmlElement *
CreateElement()138 XmlBuilder::CreateElement() {
139 return pelRoot_.release();
140 }
141
142 XmlElement *
BuiltElement()143 XmlBuilder::BuiltElement() {
144 return pelRoot_.get();
145 }
146
~XmlBuilder()147 XmlBuilder::~XmlBuilder() {
148 }
149
150
151
152 }
153