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 "talk/xmllite/xmlbuilder.h"
29
30 #include <vector>
31 #include <set>
32 #include "talk/base/common.h"
33 #include "talk/xmllite/xmlconstants.h"
34 #include "talk/xmllite/xmlelement.h"
35
36 namespace buzz {
37
XmlBuilder()38 XmlBuilder::XmlBuilder() :
39 pelCurrent_(NULL),
40 pelRoot_(),
41 pvParents_(new std::vector<XmlElement *>()) {
42 }
43
44 void
Reset()45 XmlBuilder::Reset() {
46 pelRoot_.reset();
47 pelCurrent_ = NULL;
48 pvParents_->clear();
49 }
50
51 XmlElement *
BuildElement(XmlParseContext * pctx,const char * name,const char ** atts)52 XmlBuilder::BuildElement(XmlParseContext * pctx,
53 const char * name, const char ** atts) {
54 QName tagName(pctx->ResolveQName(name, false));
55 if (tagName.IsEmpty())
56 return NULL;
57
58 XmlElement * pelNew = new XmlElement(tagName);
59
60 if (!*atts)
61 return pelNew;
62
63 std::set<QName> seenNonlocalAtts;
64
65 while (*atts) {
66 QName attName(pctx->ResolveQName(*atts, true));
67 if (attName.IsEmpty()) {
68 delete pelNew;
69 return NULL;
70 }
71
72 // verify that namespaced names are unique
73 if (!attName.Namespace().empty()) {
74 if (seenNonlocalAtts.count(attName)) {
75 delete pelNew;
76 return NULL;
77 }
78 seenNonlocalAtts.insert(attName);
79 }
80
81 pelNew->AddAttr(attName, std::string(*(atts + 1)));
82 atts += 2;
83 }
84
85 return pelNew;
86 }
87
88 void
StartElement(XmlParseContext * pctx,const char * name,const char ** atts)89 XmlBuilder::StartElement(XmlParseContext * pctx,
90 const char * name, const char ** atts) {
91 XmlElement * pelNew = BuildElement(pctx, name, atts);
92 if (pelNew == NULL) {
93 pctx->RaiseError(XML_ERROR_SYNTAX);
94 return;
95 }
96
97 if (!pelCurrent_) {
98 pelCurrent_ = pelNew;
99 pelRoot_.reset(pelNew);
100 pvParents_->push_back(NULL);
101 } else {
102 pelCurrent_->AddElement(pelNew);
103 pvParents_->push_back(pelCurrent_);
104 pelCurrent_ = pelNew;
105 }
106 }
107
108 void
EndElement(XmlParseContext * pctx,const char * name)109 XmlBuilder::EndElement(XmlParseContext * pctx, const char * name) {
110 UNUSED(pctx);
111 UNUSED(name);
112 pelCurrent_ = pvParents_->back();
113 pvParents_->pop_back();
114 }
115
116 void
CharacterData(XmlParseContext * pctx,const char * text,int len)117 XmlBuilder::CharacterData(XmlParseContext * pctx,
118 const char * text, int len) {
119 UNUSED(pctx);
120 if (pelCurrent_) {
121 pelCurrent_->AddParsedText(text, len);
122 }
123 }
124
125 void
Error(XmlParseContext * pctx,XML_Error err)126 XmlBuilder::Error(XmlParseContext * pctx, XML_Error err) {
127 UNUSED(pctx);
128 UNUSED(err);
129 pelRoot_.reset(NULL);
130 pelCurrent_ = NULL;
131 pvParents_->clear();
132 }
133
134 XmlElement *
CreateElement()135 XmlBuilder::CreateElement() {
136 return pelRoot_.release();
137 }
138
139 XmlElement *
BuiltElement()140 XmlBuilder::BuiltElement() {
141 return pelRoot_.get();
142 }
143
~XmlBuilder()144 XmlBuilder::~XmlBuilder() {
145 }
146
147 } // namespace buzz
148