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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
*
* Copyright 2016 Mozilla Foundation
*
* 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_generated_source_map_h
#define wasm_generated_source_map_h
#include "mozilla/Vector.h"
#include "vm/StringBuffer.h"
namespace js {
namespace wasm {
// The generated source location for the AST node/expression. The offset field refers
// an offset in an binary format file.
struct ExprLoc
{
uint32_t lineno;
uint32_t column;
uint32_t offset;
ExprLoc() : lineno(0), column(0), offset(0) {}
ExprLoc(uint32_t lineno_, uint32_t column_, uint32_t offset_) : lineno(lineno_), column(column_), offset(offset_) {}
};
typedef mozilla::Vector<ExprLoc, 0, TempAllocPolicy> ExprLocVector;
// The generated source WebAssembly function lines and expressions ranges.
struct FunctionLoc
{
size_t startExprsIndex;
size_t endExprsIndex;
uint32_t startLineno;
uint32_t endLineno;
FunctionLoc(size_t startExprsIndex_, size_t endExprsIndex_, uint32_t startLineno_, uint32_t endLineno_)
: startExprsIndex(startExprsIndex_),
endExprsIndex(endExprsIndex_),
startLineno(startLineno_),
endLineno(endLineno_)
{}
};
typedef mozilla::Vector<FunctionLoc, 0, TempAllocPolicy> FunctionLocVector;
// The generated source map for WebAssembly binary file. This map is generated during
// building the text buffer (see BinaryToExperimentalText).
class GeneratedSourceMap
{
ExprLocVector exprlocs_;
FunctionLocVector functionlocs_;
uint32_t totalLines_;
public:
explicit GeneratedSourceMap(JSContext* cx)
: exprlocs_(cx),
functionlocs_(cx),
totalLines_(0)
{}
ExprLocVector& exprlocs() { return exprlocs_; }
FunctionLocVector& functionlocs() { return functionlocs_; }
uint32_t totalLines() { return totalLines_; }
void setTotalLines(uint32_t val) { totalLines_ = val; }
};
typedef UniquePtr<GeneratedSourceMap> UniqueGeneratedSourceMap;
// Helper class, StringBuffer wrapper, to track the position (line and column)
// within the generated source.
class WasmPrintBuffer
{
StringBuffer& stringBuffer_;
uint32_t lineno_;
uint32_t column_;
public:
explicit WasmPrintBuffer(StringBuffer& stringBuffer)
: stringBuffer_(stringBuffer),
lineno_(1),
column_(1)
{}
inline char processChar(char ch) {
if (ch == '\n') {
lineno_++; column_ = 1;
} else
column_++;
return ch;
}
inline char16_t processChar(char16_t ch) {
if (ch == '\n') {
lineno_++; column_ = 1;
} else
column_++;
return ch;
}
bool append(const char ch) {
return stringBuffer_.append(processChar(ch));
}
bool append(const char16_t ch) {
return stringBuffer_.append(processChar(ch));
}
bool append(const char* str, size_t length) {
for (size_t i = 0; i < length; i++)
processChar(str[i]);
return stringBuffer_.append(str, length);
}
bool append(const char16_t* begin, const char16_t* end) {
for (const char16_t* p = begin; p != end; p++)
processChar(*p);
return stringBuffer_.append(begin, end);
}
bool append(const char16_t* str, size_t length) {
return append(str, str + length);
}
template <size_t ArrayLength>
bool append(const char (&array)[ArrayLength]) {
static_assert(ArrayLength > 0, "null-terminated");
MOZ_ASSERT(array[ArrayLength - 1] == '\0');
return append(array, ArrayLength - 1);
}
char16_t getChar(size_t index) {
return stringBuffer_.getChar(index);
}
size_t length() {
return stringBuffer_.length();
}
StringBuffer& stringBuffer() { return stringBuffer_; }
uint32_t lineno() { return lineno_; }
uint32_t column() { return column_; }
};
} // namespace wasm
} // namespace js
#endif // namespace wasm_generated_source_map_h
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