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
|
#include <qpdf/Pl_Buffer.hh>
#include <algorithm>
#include <stdexcept>
#include <stdlib.h>
#include <string.h>
Pl_Buffer::Members::Members() :
ready(true),
total_size(0)
{
}
Pl_Buffer::Pl_Buffer(char const* identifier, Pipeline* next) :
Pipeline(identifier, next),
m(new Members())
{
}
Pl_Buffer::~Pl_Buffer()
{
// Must be explicit and not inline -- see QPDF_DLL_CLASS in
// README-maintainer
}
void
Pl_Buffer::write(unsigned char const* buf, size_t len)
{
if (this->m->data == nullptr) {
this->m->data = std::make_shared<Buffer>(len);
}
size_t cur_size = this->m->data->getSize();
size_t left = cur_size - this->m->total_size;
if (left < len) {
size_t new_size = std::max(this->m->total_size + len, 2 * cur_size);
auto b = std::make_shared<Buffer>(new_size);
memcpy(b->getBuffer(), this->m->data->getBuffer(), this->m->total_size);
this->m->data = b;
}
if (len) {
memcpy(this->m->data->getBuffer() + this->m->total_size, buf, len);
this->m->total_size += len;
}
this->m->ready = false;
if (getNext(true)) {
getNext()->write(buf, len);
}
}
void
Pl_Buffer::finish()
{
this->m->ready = true;
if (getNext(true)) {
getNext()->finish();
}
}
Buffer*
Pl_Buffer::getBuffer()
{
if (!this->m->ready) {
throw std::logic_error("Pl_Buffer::getBuffer() called when not ready");
}
Buffer* b = new Buffer(this->m->total_size);
if (this->m->total_size > 0) {
unsigned char* p = b->getBuffer();
memcpy(p, this->m->data->getBuffer(), this->m->total_size);
}
this->m = std::shared_ptr<Members>(new Members());
return b;
}
std::shared_ptr<Buffer>
Pl_Buffer::getBufferSharedPointer()
{
return std::shared_ptr<Buffer>(getBuffer());
}
void
Pl_Buffer::getMallocBuffer(unsigned char** buf, size_t* len)
{
if (!this->m->ready) {
throw std::logic_error(
"Pl_Buffer::getMallocBuffer() called when not ready");
}
*len = this->m->total_size;
if (this->m->total_size > 0) {
*buf = reinterpret_cast<unsigned char*>(malloc(this->m->total_size));
memcpy(*buf, this->m->data->getBuffer(), this->m->total_size);
} else {
*buf = nullptr;
}
this->m = std::shared_ptr<Members>(new Members());
}
|
