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// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef TOOLS_GN_C_INCLUDE_ITERATOR_H_
#define TOOLS_GN_C_INCLUDE_ITERATOR_H_
#include "base/basictypes.h"
#include "base/strings/string_piece.h"
class InputFile;
class LocationRange;
// Iterates through #includes in C source and header files.
//
// This only returns includes we want to check, which is user includes with
// double-quotes: #include "..."
class CIncludeIterator {
public:
// The InputFile pointed to must outlive this class.
CIncludeIterator(const InputFile* input);
~CIncludeIterator();
// Fills in the string with the contents of the next include, and the
// location with where it came from, and returns true, or returns false if
// there are no more includes.
bool GetNextIncludeString(base::StringPiece* out, LocationRange* location);
// Maximum numbef of non-includes we'll tolerate before giving up. This does
// not count comments or preprocessor.
static const int kMaxNonIncludeLines;
private:
// Returns false on EOF, otherwise fills in the given line and the one-based
// line number into *line_number;
bool GetNextLine(base::StringPiece* line, int* line_number);
const InputFile* input_file_;
// This just points into input_file_.contents() for convenience.
base::StringPiece file_;
// 0-based offset into the file.
size_t offset_;
int line_number_; // One-based. Indicates the last line we read.
// Number of lines we've processed since seeing the last include (or the
// beginning of the file) with some exceptions.
int lines_since_last_include_;
DISALLOW_COPY_AND_ASSIGN(CIncludeIterator);
};
#endif // TOOLS_GN_INCLUDE_ITERATOR_H_
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