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// Copyright 2010 the V8 project authors. All rights reserved.
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following
// disclaimer in the documentation and/or other materials provided
// with the distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived
// from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#include <stdlib.h>
#include <stdarg.h>
#include <stdio.h>
#include "../include/v8stdint.h"
#include "../include/v8-preparser.h"
// This file is only used for testing the stand-alone preparser
// library.
// The first (and only) argument must be the path of a JavaScript file.
// This file is preparsed and the resulting preparser data is written
// to stdout. Diagnostic output is output on stderr.
// The file must contain only ASCII characters (UTF-8 isn't supported).
// The file is read into memory, so it should have a reasonable size.
// Adapts an ASCII string to the UnicodeInputStream interface.
class AsciiInputStream : public v8::UnicodeInputStream {
public:
AsciiInputStream(uint8_t* buffer, size_t length)
: buffer_(buffer),
end_offset_(static_cast<int>(length)),
offset_(0) { }
virtual ~AsciiInputStream() { }
virtual void PushBack(int32_t ch) {
offset_--;
#ifdef DEBUG
if (offset_ < 0 ||
(ch != ((offset_ >= end_offset_) ? -1 : buffer_[offset_]))) {
fprintf(stderr, "Invalid pushback: '%c' at offset %d.", ch, offset_);
exit(1);
}
#endif
}
virtual int32_t Next() {
if (offset_ >= end_offset_) {
offset_++; // Increment anyway to allow symmetric pushbacks.
return -1;
}
uint8_t next_char = buffer_[offset_];
#ifdef DEBUG
if (next_char > 0x7fu) {
fprintf(stderr, "Non-ASCII character in input: '%c'.", next_char);
exit(1);
}
#endif
offset_++;
return static_cast<int32_t>(next_char);
}
private:
const uint8_t* buffer_;
const int end_offset_;
int offset_;
};
bool ReadBuffer(FILE* source, void* buffer, size_t length) {
size_t actually_read = fread(buffer, 1, length, source);
return (actually_read == length);
}
bool WriteBuffer(FILE* dest, const void* buffer, size_t length) {
size_t actually_written = fwrite(buffer, 1, length, dest);
return (actually_written == length);
}
template <typename T>
class ScopedPointer {
public:
explicit ScopedPointer(T* pointer) : pointer_(pointer) {}
~ScopedPointer() { delete[] pointer_; }
T& operator[](int index) { return pointer_[index]; }
T* operator*() { return pointer_ ;}
private:
T* pointer_;
};
int main(int argc, char* argv[]) {
// Check for filename argument.
if (argc < 2) {
fprintf(stderr, "ERROR: No filename on command line.\n");
fflush(stderr);
return EXIT_FAILURE;
}
const char* filename = argv[1];
// Open JS file.
FILE* input = fopen(filename, "rb");
if (input == NULL) {
perror("ERROR: Error opening file");
fflush(stderr);
return EXIT_FAILURE;
}
// Find length of JS file.
if (fseek(input, 0, SEEK_END) != 0) {
perror("ERROR: Error during seek");
fflush(stderr);
return EXIT_FAILURE;
}
size_t length = static_cast<size_t>(ftell(input));
rewind(input);
// Read JS file into memory buffer.
ScopedPointer<uint8_t> buffer(new uint8_t[length]);
if (!ReadBuffer(input, *buffer, length)) {
perror("ERROR: Reading file");
fflush(stderr);
return EXIT_FAILURE;
}
fclose(input);
// Preparse input file.
AsciiInputStream input_buffer(*buffer, length);
size_t kMaxStackSize = 64 * 1024 * sizeof(void*); // NOLINT
v8::PreParserData data = v8::Preparse(&input_buffer, kMaxStackSize);
// Fail if stack overflow.
if (data.stack_overflow()) {
fprintf(stderr, "ERROR: Stack overflow\n");
fflush(stderr);
return EXIT_FAILURE;
}
// Print preparser data to stdout.
uint32_t size = data.size();
fprintf(stderr, "LOG: Success, data size: %u\n", size);
fflush(stderr);
if (!WriteBuffer(stdout, data.data(), size)) {
perror("ERROR: Writing data");
return EXIT_FAILURE;
}
return EXIT_SUCCESS;
}
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