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
34namespace {
35std::string kTrue = "true";
36std::string kOne = "1";
37}
38
39namespace cricket {
40
41bool BadParse(const std::string& text, ParseError* err) {
42  if (err != NULL) {
43    err->text = text;
44  }
45  return false;
46}
47
48bool BadWrite(const std::string& text, WriteError* err) {
49  if (err != NULL) {
50    err->text = text;
51  }
52  return false;
53}
54
55std::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
62std::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
68bool 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
76int 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
82void 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
89void 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
95const 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
107bool 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
121bool 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
136void 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
145void 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
153std::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