1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
|
/* Distributed under the OSI-approved BSD 3-Clause License. See accompanying
file Copyright.txt or https://cmake.org/licensing for details. */
#include "cmXMLParser.h"
#include <cstring>
#include <iostream>
#include <sstream>
#include <cm3p/expat.h>
#include "cmsys/FStream.hxx"
cmXMLParser::cmXMLParser()
{
this->Parser = nullptr;
this->ParseError = 0;
this->ReportCallback = nullptr;
this->ReportCallbackData = nullptr;
}
cmXMLParser::~cmXMLParser()
{
if (this->Parser) {
this->CleanupParser();
}
}
int cmXMLParser::Parse(const char* string)
{
return this->InitializeParser() &&
this->ParseChunk(string, strlen(string)) && this->CleanupParser();
}
int cmXMLParser::ParseFile(const char* file)
{
if (!file) {
return 0;
}
cmsys::ifstream ifs(file);
if (!ifs) {
return 0;
}
std::ostringstream str;
str << ifs.rdbuf();
return this->Parse(str.str().c_str());
}
int cmXMLParser::InitializeParser()
{
if (this->Parser) {
std::cerr << "Parser already initialized" << std::endl;
this->ParseError = 1;
return 0;
}
// Create the expat XML parser.
this->Parser = XML_ParserCreate(nullptr);
XML_SetElementHandler(static_cast<XML_Parser>(this->Parser),
&cmXMLParserStartElement, &cmXMLParserEndElement);
XML_SetCharacterDataHandler(static_cast<XML_Parser>(this->Parser),
&cmXMLParserCharacterDataHandler);
XML_SetUserData(static_cast<XML_Parser>(this->Parser), this);
this->ParseError = 0;
return 1;
}
int cmXMLParser::ParseChunk(const char* inputString,
std::string::size_type length)
{
if (!this->Parser) {
std::cerr << "Parser not initialized" << std::endl;
this->ParseError = 1;
return 0;
}
int res;
res = this->ParseBuffer(inputString, length);
if (res == 0) {
this->ParseError = 1;
}
return res;
}
int cmXMLParser::CleanupParser()
{
if (!this->Parser) {
std::cerr << "Parser not initialized" << std::endl;
this->ParseError = 1;
return 0;
}
int result = !this->ParseError;
if (result) {
// Tell the expat XML parser about the end-of-input.
if (!XML_Parse(static_cast<XML_Parser>(this->Parser), "", 0, 1)) {
this->ReportXmlParseError();
result = 0;
}
}
// Clean up the parser.
XML_ParserFree(static_cast<XML_Parser>(this->Parser));
this->Parser = nullptr;
return result;
}
int cmXMLParser::ParseBuffer(const char* buffer, std::string::size_type count)
{
// Pass the buffer to the expat XML parser.
if (!XML_Parse(static_cast<XML_Parser>(this->Parser), buffer,
static_cast<int>(count), 0)) {
this->ReportXmlParseError();
return 0;
}
return 1;
}
int cmXMLParser::ParseBuffer(const char* buffer)
{
return this->ParseBuffer(buffer, static_cast<int>(strlen(buffer)));
}
int cmXMLParser::ParsingComplete()
{
// Default behavior is to parse to end of stream.
return 0;
}
void cmXMLParser::StartElement(const std::string& name, const char** /*atts*/)
{
std::cout << "Start element: " << name << std::endl;
}
void cmXMLParser::EndElement(const std::string& name)
{
std::cout << "End element: " << name << std::endl;
}
void cmXMLParser::CharacterDataHandler(const char* /*inData*/,
int /*inLength*/)
{
}
const char* cmXMLParser::FindAttribute(const char** atts,
const char* attribute)
{
if (atts && attribute) {
for (const char** a = atts; *a && *(a + 1); a += 2) {
if (strcmp(*a, attribute) == 0) {
return *(a + 1);
}
}
}
return nullptr;
}
void cmXMLParserStartElement(void* parser, const char* name, const char** atts)
{
// Begin element handler that is registered with the XML_Parser.
// This just casts the user data to a cmXMLParser and calls
// StartElement.
static_cast<cmXMLParser*>(parser)->StartElement(name, atts);
}
void cmXMLParserEndElement(void* parser, const char* name)
{
// End element handler that is registered with the XML_Parser. This
// just casts the user data to a cmXMLParser and calls EndElement.
static_cast<cmXMLParser*>(parser)->EndElement(name);
}
void cmXMLParserCharacterDataHandler(void* parser, const char* data,
int length)
{
// Character data handler that is registered with the XML_Parser.
// This just casts the user data to a cmXMLParser and calls
// CharacterDataHandler.
static_cast<cmXMLParser*>(parser)->CharacterDataHandler(data, length);
}
void cmXMLParser::ReportXmlParseError()
{
XML_Parser parser = static_cast<XML_Parser>(this->Parser);
this->ReportError(static_cast<int>(XML_GetCurrentLineNumber(parser)),
static_cast<int>(XML_GetCurrentColumnNumber(parser)),
XML_ErrorString(XML_GetErrorCode(parser)));
}
void cmXMLParser::ReportError(int line, int /*unused*/, const char* msg)
{
if (this->ReportCallback) {
this->ReportCallback(line, msg, this->ReportCallbackData);
} else {
std::cerr << "Error parsing XML in stream at line " << line << ": " << msg
<< std::endl;
}
}
|
