-
-
Notifications
You must be signed in to change notification settings - Fork 1.9k
/
pl_functions.cpp
237 lines (184 loc) · 8.75 KB
/
pl_functions.cpp
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
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
#include <hex.hpp>
#include <hex/plugin.hpp>
#include <hex/api/content_registry.hpp>
#include <pl/core/evaluator.hpp>
#include <pl/patterns/pattern.hpp>
#include <wolv/utils/guards.hpp>
#include <vector>
#include <optional>
#if IMHEX_FEATURE_ENABLED(ZLIB)
#include <zlib.h>
#endif
#if IMHEX_FEATURE_ENABLED(BZIP2)
#include <bzlib.h>
#endif
#if IMHEX_FEATURE_ENABLED(LIBLZMA)
#include <lzma.h>
#endif
#if IMHEX_FEATURE_ENABLED(ZSTD)
#include <zstd.h>
#endif
namespace hex::plugin::decompress {
namespace {
std::vector<u8> getCompressedData(pl::core::Evaluator *evaluator, const pl::core::Token::Literal &literal) {
const auto inputPattern = literal.toPattern();
std::vector<u8> compressedData;
compressedData.resize(inputPattern->getSize());
evaluator->readData(inputPattern->getOffset(), compressedData.data(), compressedData.size(), inputPattern->getSection());
return compressedData;
}
}
void registerPatternLanguageFunctions() {
using namespace pl::core;
using FunctionParameterCount = pl::api::FunctionParameterCount;
const pl::api::Namespace nsHexDec = { "builtin", "hex", "dec" };
/* zlib_decompress(compressed_pattern, section_id) */
ContentRegistry::PatternLanguage::addFunction(nsHexDec, "zlib_decompress", FunctionParameterCount::exactly(3), [](Evaluator *evaluator, auto params) -> std::optional<Token::Literal> {
#if IMHEX_FEATURE_ENABLED(ZLIB)
auto compressedData = getCompressedData(evaluator, params[0]);
auto §ion = evaluator->getSection(params[1].toUnsigned());
auto windowSize = params[2].toUnsigned();
z_stream stream = { };
if (inflateInit2(&stream, windowSize) != Z_OK) {
return false;
}
section.resize(100);
stream.avail_in = compressedData.size();
stream.avail_out = section.size();
stream.next_in = compressedData.data();
stream.next_out = section.data();
ON_SCOPE_EXIT {
inflateEnd(&stream);
};
while (stream.avail_in != 0) {
auto res = inflate(&stream, Z_NO_FLUSH);
if (res == Z_STREAM_END) {
section.resize(section.size() - stream.avail_out);
break;
}
if (res != Z_OK)
return false;
if (stream.avail_out != 0)
break;
const auto prevSectionSize = section.size();
section.resize(prevSectionSize * 2);
stream.next_out = section.data() + prevSectionSize;
stream.avail_out = prevSectionSize;
}
return true;
#else
hex::unused(evaluator, params);
err::E0012.throwError("hex::dec::zlib_decompress is not available. Please recompile with zlib support.");
#endif
});
/* bzip_decompress(compressed_pattern, section_id) */
ContentRegistry::PatternLanguage::addFunction(nsHexDec, "bzip_decompress", FunctionParameterCount::exactly(2), [](Evaluator *evaluator, auto params) -> std::optional<Token::Literal> {
#if IMHEX_FEATURE_ENABLED(BZIP2)
auto compressedData = getCompressedData(evaluator, params[0]);
auto §ion = evaluator->getSection(params[1].toUnsigned());
bz_stream stream = { };
if (BZ2_bzDecompressInit(&stream, 0, 1) != Z_OK) {
return false;
}
section.resize(100);
stream.avail_in = compressedData.size();
stream.avail_out = section.size();
stream.next_in = reinterpret_cast<char*>(compressedData.data());
stream.next_out = reinterpret_cast<char*>(section.data());
ON_SCOPE_EXIT {
BZ2_bzDecompressEnd(&stream);
};
while (stream.avail_in != 0) {
auto res = BZ2_bzDecompress(&stream);
if (res == BZ_STREAM_END) {
section.resize(section.size() - stream.avail_out);
break;
}
if (res != BZ_OK)
return false;
if (stream.avail_out != 0)
break;
const auto prevSectionSize = section.size();
section.resize(prevSectionSize * 2);
stream.next_out = reinterpret_cast<char*>(section.data()) + prevSectionSize;
stream.avail_out = prevSectionSize;
}
return true;
#else
hex::unused(evaluator, params);
err::E0012.throwError("hex::dec::bzlib_decompress is not available. Please recompile with bzip2 support.");
#endif
});
/* lzma_decompress(compressed_pattern, section_id) */
ContentRegistry::PatternLanguage::addFunction(nsHexDec, "lzma_decompress", FunctionParameterCount::exactly(2), [](Evaluator *evaluator, auto params) -> std::optional<Token::Literal> {
#if IMHEX_FEATURE_ENABLED(LIBLZMA)
auto compressedData = getCompressedData(evaluator, params[0]);
auto §ion = evaluator->getSection(params[1].toUnsigned());
lzma_stream stream = LZMA_STREAM_INIT;
if (lzma_auto_decoder(&stream, 0x10000, LZMA_IGNORE_CHECK) != Z_OK) {
return false;
}
section.resize(100);
stream.avail_in = compressedData.size();
stream.avail_out = section.size();
stream.next_in = compressedData.data();
stream.next_out = section.data();
ON_SCOPE_EXIT {
lzma_end(&stream);
};
while (stream.avail_in != 0) {
auto res = lzma_code(&stream, LZMA_RUN);
if (res == BZ_STREAM_END) {
section.resize(section.size() - stream.avail_out);
break;
}
if (res != LZMA_OK && res != LZMA_STREAM_END)
return false;
if (stream.avail_out != 0)
break;
const auto prevSectionSize = section.size();
section.resize(prevSectionSize * 2);
stream.next_out = section.data() + prevSectionSize;
stream.avail_out = prevSectionSize;
}
return true;
#else
hex::unused(evaluator, params);
err::E0012.throwError("hex::dec::lzma_decompress is not available. Please recompile with liblzma support.");
#endif
});
/* zstd_decompress(compressed_pattern, section_id) */
ContentRegistry::PatternLanguage::addFunction(nsHexDec, "zstd_decompress", FunctionParameterCount::exactly(2), [](Evaluator *evaluator, auto params) -> std::optional<Token::Literal> {
#if IMHEX_FEATURE_ENABLED(ZSTD)
auto compressedData = getCompressedData(evaluator, params[0]);
auto §ion = evaluator->getSection(params[1].toUnsigned());
ZSTD_DCtx* dctx = ZSTD_createDCtx();
if (dctx == nullptr) {
return false;
}
ON_SCOPE_EXIT {
ZSTD_freeDCtx(dctx);
};
const u8* source = compressedData.data();
size_t sourceSize = compressedData.size();
do {
size_t blockSize = ZSTD_getFrameContentSize(source, sourceSize);
if (blockSize == ZSTD_CONTENTSIZE_ERROR) {
return false;
}
section.resize(section.size() + blockSize);
size_t decodedSize = ZSTD_decompressDCtx(dctx, section.data() + section.size() - blockSize, blockSize, source, sourceSize);
if (ZSTD_isError(decodedSize)) {
return false;
}
source = source + sourceSize;
sourceSize = 0;
} while (sourceSize > 0);
return true;
#else
hex::unused(evaluator, params);
err::E0012.throwError("hex::dec::zstd_decompress is not available. Please recompile with zstd support.");
#endif
});
}
}