1 /*
2 * libjingle
3 * Copyright 2010, 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/p2p/base/parsing.h"
29
30 #include <algorithm>
31 #include <stdlib.h>
32 #include "talk/base/stringutils.h"
33
34 namespace {
35 std::string kTrue = "true";
36 std::string kOne = "1";
37 }
38
39 namespace cricket {
40
BadParse(const std::string & text,ParseError * err)41 bool BadParse(const std::string& text, ParseError* err) {
42 if (err != NULL) {
43 err->text = text;
44 }
45 return false;
46 }
47
BadWrite(const std::string & text,WriteError * err)48 bool BadWrite(const std::string& text, WriteError* err) {
49 if (err != NULL) {
50 err->text = text;
51 }
52 return false;
53 }
54
GetXmlAttr(const buzz::XmlElement * elem,const buzz::QName & name,const std::string & def)55 std::string GetXmlAttr(const buzz::XmlElement* elem,
56 const buzz::QName& name,
57 const std::string& def) {
58 std::string val = elem->Attr(name);
59 return val.empty() ? def : val;
60 }
61
GetXmlAttr(const buzz::XmlElement * elem,const buzz::QName & name,const char * def)62 std::string GetXmlAttr(const buzz::XmlElement* elem,
63 const buzz::QName& name,
64 const char* def) {
65 return GetXmlAttr(elem, name, std::string(def));
66 }
67
GetXmlAttr(const buzz::XmlElement * elem,const buzz::QName & name,bool def)68 bool GetXmlAttr(const buzz::XmlElement* elem,
69 const buzz::QName& name, bool def) {
70 std::string val = elem->Attr(name);
71 std::transform(val.begin(), val.end(), val.begin(), tolower);
72
73 return val.empty() ? def : (val == kTrue || val == kOne);
74 }
75
GetXmlAttr(const buzz::XmlElement * elem,const buzz::QName & name,int def)76 int GetXmlAttr(const buzz::XmlElement* elem,
77 const buzz::QName& name, int def) {
78 std::string val = elem->Attr(name);
79 return val.empty() ? def : atoi(val.c_str());
80 }
81
AddXmlAttr(buzz::XmlElement * elem,const buzz::QName & name,int n)82 void AddXmlAttr(buzz::XmlElement* elem,
83 const buzz::QName& name, int n) {
84 char buf[32];
85 talk_base::sprintfn(buf, sizeof(buf), "%d", n);
86 elem->AddAttr(name, buf);
87 }
88
SetXmlBody(buzz::XmlElement * elem,uint32 u)89 void SetXmlBody(buzz::XmlElement* elem, uint32 u) {
90 char buf[16];
91 talk_base::sprintfn(buf, sizeof(buf), "%u", u);
92 elem->SetBodyText(buf);
93 }
94
GetXmlChild(const buzz::XmlElement * parent,const std::string & name)95 const buzz::XmlElement* GetXmlChild(const buzz::XmlElement* parent,
96 const std::string& name) {
97 for (const buzz::XmlElement* child = parent->FirstElement();
98 child != NULL;
99 child = child->NextElement()) {
100 if (child->Name().LocalPart() == name) {
101 return child;
102 }
103 }
104 return NULL;
105 }
106
RequireXmlChild(const buzz::XmlElement * parent,const std::string & name,const buzz::XmlElement ** child,ParseError * error)107 bool RequireXmlChild(const buzz::XmlElement* parent,
108 const std::string& name,
109 const buzz::XmlElement** child,
110 ParseError* error) {
111 *child = GetXmlChild(parent, name);
112 if (*child == NULL) {
113 return BadParse("element '" + parent->Name().Merged() +
114 "' missing required child '" + name,
115 error);
116 } else {
117 return true;
118 }
119 }
120
RequireXmlAttr(const buzz::XmlElement * elem,const buzz::QName & name,std::string * value,ParseError * error)121 bool RequireXmlAttr(const buzz::XmlElement* elem,
122 const buzz::QName& name,
123 std::string* value,
124 ParseError* error) {
125 if (!elem->HasAttr(name)) {
126 return BadParse("element '" + elem->Name().Merged() +
127 "' missing required attribute '"
128 + name.Merged() + "'",
129 error);
130 } else {
131 *value = elem->Attr(name);
132 return true;
133 }
134 }
135
AddXmlChildren(buzz::XmlElement * parent,const std::vector<buzz::XmlElement * > & children)136 void AddXmlChildren(buzz::XmlElement* parent,
137 const std::vector<buzz::XmlElement*>& children) {
138 for (std::vector<buzz::XmlElement*>::const_iterator iter = children.begin();
139 iter != children.end();
140 iter++) {
141 parent->AddElement(*iter);
142 }
143 }
144
CopyXmlChildren(const buzz::XmlElement * source,buzz::XmlElement * dest)145 void CopyXmlChildren(const buzz::XmlElement* source, buzz::XmlElement* dest) {
146 for (const buzz::XmlElement* child = source->FirstElement();
147 child != NULL;
148 child = child->NextElement()) {
149 dest->AddElement(new buzz::XmlElement(*child));
150 }
151 }
152
CopyOfXmlChildren(const buzz::XmlElement * elem)153 std::vector<buzz::XmlElement*> CopyOfXmlChildren(const buzz::XmlElement* elem) {
154 std::vector<buzz::XmlElement*> children;
155 for (const buzz::XmlElement* child = elem->FirstElement();
156 child != NULL;
157 child = child->NextElement()) {
158 children.push_back(new buzz::XmlElement(*child));
159 }
160 return children;
161 }
162
163 } // namespace cricket
164