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117 lines
4.5 KiB
117 lines
4.5 KiB
// Copyright 2011 the V8 project authors. All rights reserved.
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following
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// disclaimer in the documentation and/or other materials provided
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// with the distribution.
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// * Neither the name of Google Inc. nor the names of its
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// contributors may be used to endorse or promote products derived
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// from this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#ifndef PREPARSER_H
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#define PREPARSER_H
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#include "v8stdint.h"
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#ifdef _WIN32
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// Setup for Windows DLL export/import. When building the V8 DLL the
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// BUILDING_V8_SHARED needs to be defined. When building a program which uses
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// the V8 DLL USING_V8_SHARED needs to be defined. When either building the V8
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// static library or building a program which uses the V8 static library neither
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// BUILDING_V8_SHARED nor USING_V8_SHARED should be defined.
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#if defined(BUILDING_V8_SHARED) && defined(USING_V8_SHARED)
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#error both BUILDING_V8_SHARED and USING_V8_SHARED are set - please check the\
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build configuration to ensure that at most one of these is set
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#endif
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#ifdef BUILDING_V8_SHARED
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#define V8EXPORT __declspec(dllexport)
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#elif USING_V8_SHARED
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#define V8EXPORT __declspec(dllimport)
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#else
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#define V8EXPORT
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#endif // BUILDING_V8_SHARED
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#else // _WIN32
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// Setup for Linux shared library export. There is no need to distinguish
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// between building or using the V8 shared library, but we should not
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// export symbols when we are building a static library.
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#if defined(__GNUC__) && (__GNUC__ >= 4) && defined(V8_SHARED)
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#define V8EXPORT __attribute__ ((visibility("default")))
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#else // defined(__GNUC__) && (__GNUC__ >= 4)
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#define V8EXPORT
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#endif // defined(__GNUC__) && (__GNUC__ >= 4)
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#endif // _WIN32
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namespace v8 {
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// The result of preparsing is either a stack overflow error, or an opaque
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// blob of data that can be passed back into the parser.
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class V8EXPORT PreParserData {
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public:
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PreParserData(size_t size, const uint8_t* data)
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: data_(data), size_(size) { }
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// Create a PreParserData value where stack_overflow reports true.
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static PreParserData StackOverflow() { return PreParserData(0, NULL); }
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// Whether the pre-parser stopped due to a stack overflow.
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// If this is the case, size() and data() should not be used.
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bool stack_overflow() { return size_ == 0u; }
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// The size of the data in bytes.
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size_t size() const { return size_; }
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// Pointer to the data.
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const uint8_t* data() const { return data_; }
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private:
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const uint8_t* const data_;
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const size_t size_;
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};
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// Interface for a stream of Unicode characters.
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class V8EXPORT UnicodeInputStream { // NOLINT - Thinks V8EXPORT is class name.
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public:
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virtual ~UnicodeInputStream();
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// Returns the next Unicode code-point in the input, or a negative value when
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// there is no more input in the stream.
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virtual int32_t Next() = 0;
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};
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// Preparse a JavaScript program. The source code is provided as a
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// UnicodeInputStream. The max_stack_size limits the amount of stack
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// space that the preparser is allowed to use. If the preparser uses
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// more stack space than the limit provided, the result's stack_overflow()
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// method will return true. Otherwise the result contains preparser
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// data that can be used by the V8 parser to speed up parsing.
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PreParserData V8EXPORT Preparse(UnicodeInputStream* input,
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size_t max_stack_size);
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} // namespace v8.
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#endif // PREPARSER_H
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