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-rw-r--r--src/ast/memory-utils.h56
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-/*
- * 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
-