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#ifndef COMPONENTS_FILES_ESCAPE_HPP
#define COMPONENTS_FILES_ESCAPE_HPP
#include <queue>
#include <components/files/multidircollection.hpp>
#include <boost/iostreams/filtering_stream.hpp>
#include <boost/filesystem/path.hpp>
#include <boost/program_options.hpp>
/**
* \namespace Files
*/
namespace Files
{
/**
* \struct escape_hash_filter
*/
struct escape_hash_filter : public boost::iostreams::input_filter
{
static const int sEscape;
static const int sHashIdentifier;
static const int sEscapeIdentifier;
escape_hash_filter();
virtual ~escape_hash_filter();
template <typename Source> int get(Source & src);
private:
std::queue<int> mNext;
bool mSeenNonWhitespace;
bool mFinishLine;
};
template <typename Source>
int escape_hash_filter::get(Source & src)
{
if (mNext.empty())
{
int character = boost::iostreams::get(src);
if (character == boost::iostreams::WOULD_BLOCK)
{
mNext.push(character);
}
else if (character == EOF)
{
mSeenNonWhitespace = false;
mFinishLine = false;
mNext.push(character);
}
else if (character == '\n')
{
mSeenNonWhitespace = false;
mFinishLine = false;
mNext.push(character);
}
else if (mFinishLine)
{
mNext.push(character);
}
else if (character == '#')
{
if (mSeenNonWhitespace)
{
mNext.push(sEscape);
mNext.push(sHashIdentifier);
}
else
{
//it's fine being interpreted by Boost as a comment, and so is anything afterwards
mNext.push(character);
mFinishLine = true;
}
}
else if (character == sEscape)
{
mNext.push(sEscape);
mNext.push(sEscapeIdentifier);
}
else
{
mNext.push(character);
}
if (!mSeenNonWhitespace && !isspace(character))
mSeenNonWhitespace = true;
}
int retval = mNext.front();
mNext.pop();
return retval;
}
struct unescape_hash_filter : public boost::iostreams::input_filter
{
unescape_hash_filter();
virtual ~unescape_hash_filter();
template <typename Source> int get(Source & src);
private:
bool expectingIdentifier;
};
template <typename Source>
int unescape_hash_filter::get(Source & src)
{
int character;
if (!expectingIdentifier)
character = boost::iostreams::get(src);
else
{
character = escape_hash_filter::sEscape;
expectingIdentifier = false;
}
if (character == escape_hash_filter::sEscape)
{
int nextChar = boost::iostreams::get(src);
int intended;
if (nextChar == escape_hash_filter::sEscapeIdentifier)
intended = escape_hash_filter::sEscape;
else if (nextChar == escape_hash_filter::sHashIdentifier)
intended = '#';
else if (nextChar == boost::iostreams::WOULD_BLOCK)
{
expectingIdentifier = true;
intended = nextChar;
}
else
intended = '?';
return intended;
}
else
return character;
}
/**
* \class EscapeHashString
*/
class EscapeHashString
{
private:
std::string mData;
public:
static std::string processString(const std::string & str);
EscapeHashString();
EscapeHashString(const std::string & str);
EscapeHashString(const std::string & str, size_t pos, size_t len = std::string::npos);
EscapeHashString(const char * s);
EscapeHashString(const char * s, size_t n);
EscapeHashString(size_t n, char c);
template <class InputIterator>
EscapeHashString(InputIterator first, InputIterator last);
std::string toStdString() const;
friend std::ostream & operator<< (std::ostream & os, const EscapeHashString & eHS);
};
std::istream & operator>> (std::istream & is, EscapeHashString & eHS);
struct EscapeStringVector
{
std::vector<Files::EscapeHashString> mVector;
EscapeStringVector();
virtual ~EscapeStringVector();
std::vector<std::string> toStdStringVector() const;
};
//boost program options validation
void validate(boost::any &v, const std::vector<std::string> &tokens, Files::EscapeHashString * eHS, int a);
void validate(boost::any &v, const std::vector<std::string> &tokens, EscapeStringVector *, int);
struct EscapePath
{
boost::filesystem::path mPath;
static PathContainer toPathContainer(const std::vector<EscapePath> & escapePathContainer);
};
typedef std::vector<EscapePath> EscapePathContainer;
std::istream & operator>> (std::istream & istream, EscapePath & escapePath);
} /* namespace Files */
#endif /* COMPONENTS_FILES_ESCAPE_HPP */
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