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
|
// Copyright 2016 The Bazel Authors. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include "src/tools/singlejar/combiners.h"
#include "src/tools/singlejar/diag.h"
Combiner::~Combiner() {}
Concatenator::~Concatenator() {}
bool Concatenator::Merge(const CDH *cdh, const LH *lh) {
if (insert_newlines_ && buffer_.get() && buffer_->data_size() &&
'\n' != buffer_->last_byte()) {
Append("\n", 1);
}
CreateBuffer();
if (Z_NO_COMPRESSION == lh->compression_method()) {
buffer_->ReadEntryContents(lh);
} else if (Z_DEFLATED == lh->compression_method()) {
if (!inflater_.get()) {
inflater_.reset(new Inflater());
}
buffer_->DecompressEntryContents(cdh, lh, inflater_.get());
} else {
errx(2, "%s is neither stored nor deflated", filename_.c_str());
}
return true;
}
void *Concatenator::OutputEntry(bool compress) {
if (!buffer_.get()) {
return nullptr;
}
// Allocate a contiguous buffer for the local file header and
// deflated data. We assume that deflate decreases the size, so if
// the deflater reports overflow, we just save original data.
size_t deflated_buffer_size =
sizeof(LH) + filename_.size() + buffer_->data_size();
// Huge entry (>4GB) needs Zip64 extension field with 64-bit original
// and compressed size values.
uint8_t
zip64_extension_buffer[sizeof(Zip64ExtraField) + 2 * sizeof(uint64_t)];
bool huge_buffer = ziph::zfield_needs_ext64(buffer_->data_size());
if (huge_buffer) {
deflated_buffer_size += sizeof(zip64_extension_buffer);
}
LH *lh = reinterpret_cast<LH *>(malloc(deflated_buffer_size));
if (lh == nullptr) {
return nullptr;
}
lh->signature();
lh->version(20);
lh->bit_flag(0x0);
lh->last_mod_file_time(1); // 00:00:01
lh->last_mod_file_date(33); // 1980-01-01
lh->crc32(0x12345678);
lh->compressed_file_size32(0);
lh->file_name(filename_.c_str(), filename_.size());
if (huge_buffer) {
// Add Z64 extension if this is a huge entry.
lh->uncompressed_file_size32(0xFFFFFFFF);
Zip64ExtraField *z64 =
reinterpret_cast<Zip64ExtraField *>(zip64_extension_buffer);
z64->signature();
z64->payload_size(2 * sizeof(uint64_t));
z64->attr64(0, buffer_->data_size());
lh->extra_fields(reinterpret_cast<uint8_t *>(z64), z64->size());
} else {
lh->uncompressed_file_size32(buffer_->data_size());
lh->extra_fields(nullptr, 0);
}
uint32_t checksum;
uint64_t compressed_size;
uint16_t method;
if (compress) {
method = buffer_->CompressOut(lh->data(), &checksum, &compressed_size);
} else {
buffer_->CopyOut(lh->data(), &checksum);
method = Z_NO_COMPRESSION;
compressed_size = buffer_->data_size();
}
lh->crc32(checksum);
lh->compression_method(method);
if (huge_buffer) {
lh->compressed_file_size32(ziph::zfield_needs_ext64(compressed_size)
? 0xFFFFFFFF
: compressed_size);
// Not sure if this has to be written in the small case, but it shouldn't
// hurt.
const_cast<Zip64ExtraField *>(lh->zip64_extra_field())
->attr64(1, compressed_size);
} else {
// If original data is <4GB, the compressed one is, too.
lh->compressed_file_size32(compressed_size);
}
return reinterpret_cast<void *>(lh);
}
NullCombiner::~NullCombiner() {}
bool NullCombiner::Merge(const CDH *cdh, const LH *lh) { return true; }
void *NullCombiner::OutputEntry(bool compress) { return nullptr; }
XmlCombiner::~XmlCombiner() {}
bool XmlCombiner::Merge(const CDH *cdh, const LH *lh) {
if (!concatenator_.get()) {
concatenator_.reset(new Concatenator(filename_, false));
concatenator_->Append(start_tag_);
concatenator_->Append("\n");
}
// To ensure xml concatentation is idempotent, read in the entry being added
// and remove the start and end tags if they are present.
TransientBytes bytes_;
if (Z_NO_COMPRESSION == lh->compression_method()) {
bytes_.ReadEntryContents(lh);
} else if (Z_DEFLATED == lh->compression_method()) {
if (!inflater_.get()) {
inflater_.reset(new Inflater());
}
bytes_.DecompressEntryContents(cdh, lh, inflater_.get());
} else {
errx(2, "%s is neither stored nor deflated", filename_.c_str());
}
uint32_t checksum;
char *buf = reinterpret_cast<char *>(malloc(bytes_.data_size()));
// TODO(b/37631490): optimize this to avoid copying the bytes twice
bytes_.CopyOut(reinterpret_cast<uint8_t *>(buf), &checksum);
int start_offset = 0;
if (strncmp(buf, start_tag_.c_str(), start_tag_.length()) == 0) {
start_offset = start_tag_.length();
}
uint64_t end = bytes_.data_size();
while (end >= end_tag_.length() && std::isspace(buf[end - 1])) end--;
if (strncmp(buf + end - end_tag_.length(), end_tag_.c_str(),
end_tag_.length()) == 0) {
end -= end_tag_.length();
} else {
// Leave trailing whitespace alone if we didn't find a match.
end = bytes_.data_size();
}
concatenator_->Append(buf + start_offset, end - start_offset);
free(buf);
return true;
}
void *XmlCombiner::OutputEntry(bool compress) {
if (!concatenator_.get()) {
return nullptr;
}
concatenator_->Append(end_tag_);
concatenator_->Append("\n");
return concatenator_->OutputEntry(compress);
}
PropertyCombiner::~PropertyCombiner() {}
bool PropertyCombiner::Merge(const CDH *cdh, const LH *lh) {
return false; // This should not be called.
}
|
