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// Copyright 2009-2021 Intel Corporation
// SPDX-License-Identifier: Apache-2.0
#pragma once
#include "stream.h"
namespace embree
{
/* removes all line comments from a stream */
class LineCommentFilter : public Stream<int>
{
public:
LineCommentFilter (const FileName& fileName, const std::string& lineComment)
: cin(new FileStream(fileName)), lineComment(lineComment) {}
LineCommentFilter (Ref<Stream<int> > cin, const std::string& lineComment)
: cin(cin), lineComment(lineComment) {}
ParseLocation location() { return cin->loc(); }
int next()
{
/* look if the line comment starts here */
for (size_t j=0; j<lineComment.size(); j++) {
if (cin->peek() != lineComment[j]) { cin->unget(j); goto not_found; }
cin->get();
}
/* eat all characters until the end of the line (or file) */
while (cin->peek() != '\n' && cin->peek() != EOF) cin->get();
not_found:
return cin->get();
}
private:
Ref<Stream<int> > cin;
std::string lineComment;
};
}
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