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
|
#include <qpdf/Pl_QPDFTokenizer.hh>
#include <qpdf/QPDF_String.hh>
#include <qpdf/QPDF_Name.hh>
#include <qpdf/QTC.hh>
#include <qpdf/QUtil.hh>
#include <stdexcept>
#include <string.h>
Pl_QPDFTokenizer::Pl_QPDFTokenizer(char const* identifier, Pipeline* next) :
Pipeline(identifier, next),
just_wrote_nl(false),
last_char_was_cr(false),
unread_char(false),
char_to_unread('\0')
{
tokenizer.allowEOF();
tokenizer.includeIgnorable();
}
Pl_QPDFTokenizer::~Pl_QPDFTokenizer()
{
}
void
Pl_QPDFTokenizer::writeNext(char const* buf, size_t len)
{
if (len)
{
getNext()->write(QUtil::unsigned_char_pointer(buf), len);
this->just_wrote_nl = (buf[len-1] == '\n');
}
}
void
Pl_QPDFTokenizer::writeToken(QPDFTokenizer::Token& token)
{
std::string value = token.getRawValue();
switch (token.getType())
{
case QPDFTokenizer::tt_space:
{
size_t len = value.length();
for (size_t i = 0; i < len; ++i)
{
char ch = value.at(i);
if (ch == '\r')
{
if ((i + 1 < len) && (value.at(i + 1) == '\n'))
{
// ignore
}
else
{
writeNext("\n", 1);
}
}
else
{
writeNext(&ch, 1);
}
}
}
value.clear();
break;
case QPDFTokenizer::tt_string:
value = QPDF_String(token.getValue()).unparse();
break;
case QPDFTokenizer::tt_name:
value = QPDF_Name(token.getValue()).unparse();
break;
default:
break;
}
writeNext(value.c_str(), value.length());
}
void
Pl_QPDFTokenizer::processChar(char ch)
{
tokenizer.presentCharacter(ch);
QPDFTokenizer::Token token;
if (tokenizer.getToken(token, this->unread_char, this->char_to_unread))
{
writeToken(token);
std::string value = token.getRawValue();
QPDFTokenizer::token_type_e token_type = token.getType();
if (((token_type == QPDFTokenizer::tt_string) ||
(token_type == QPDFTokenizer::tt_name)) &&
((value.find('\r') != std::string::npos) ||
(value.find('\n') != std::string::npos)))
{
writeNext("\n", 1);
}
if ((token.getType() == QPDFTokenizer::tt_word) &&
(token.getValue() == "ID"))
{
QTC::TC("qpdf", "Pl_QPDFTokenizer found ID");
tokenizer.expectInlineImage();
}
}
}
void
Pl_QPDFTokenizer::checkUnread()
{
if (this->unread_char)
{
processChar(this->char_to_unread);
if (this->unread_char)
{
throw std::logic_error(
"INTERNAL ERROR: unread_char still true after processing "
"unread character");
}
}
}
void
Pl_QPDFTokenizer::write(unsigned char* buf, size_t len)
{
checkUnread();
for (size_t i = 0; i < len; ++i)
{
processChar(buf[i]);
checkUnread();
}
}
void
Pl_QPDFTokenizer::finish()
{
this->tokenizer.presentEOF();
QPDFTokenizer::Token token;
if (tokenizer.getToken(token, this->unread_char, this->char_to_unread))
{
writeToken(token);
if (unread_char)
{
if (this->char_to_unread == '\r')
{
this->char_to_unread = '\n';
}
writeNext(&this->char_to_unread, 1);
}
}
getNext()->finish();
}
|
