blob: dfb33837dfa32f24f104cf0438f04ec9ecddeae2 (
plain)
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
|
/*
* Copyright 2017 WebAssembly Community Group participants
*
* 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.
*/
#ifndef wasm_ast_memory_h
#define wasm_ast_memory_h
#include <algorithm>
#include <vector>
#include "literal.h"
#include "wasm.h"
namespace wasm {
namespace MemoryUtils {
// flattens memory into a single data segment. returns true if successful
inline bool flatten(Memory& memory) {
if (memory.segments.size() == 0) return true;
std::vector<char> data;
for (auto& segment : memory.segments) {
auto* offset = segment.offset->dynCast<Const>();
if (!offset) return false;
}
for (auto& segment : memory.segments) {
auto* offset = segment.offset->dynCast<Const>();
auto start = offset->value.getInteger();
auto end = start + segment.data.size();
if (end > data.size()) {
data.resize(end);
}
std::copy(segment.data.begin(), segment.data.end(), data.begin() + start);
}
memory.segments.resize(1);
memory.segments[0].offset->cast<Const>()->value = Literal(int32_t(0));
memory.segments[0].data.swap(data);
return true;
}
};
} // namespace wasm
#endif // wasm_ast_memory_h
|
