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// (C) Copyright 2008 CodeRage, LLC (turkanis at coderage dot com)
// (C) Copyright 2005-2007 Jonathan Turkanis
// Distributed under the Boost Software License, Version 1.0. (See accompanying
// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt.)
// See http://www.boost.org/libs/iostreams for documentation.
#ifndef BOOST_IOSTREAMS_FILTER_TEST_HPP_INCLUDED
#if defined(_MSC_VER)
# pragma once
#endif
#include <boost/config.hpp> // BOOST_MSVC,put size_t in std.
#include <boost/detail/workaround.hpp>
#include <algorithm> // min.
#include <cstddef> // size_t.
#if BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x564)) || \
BOOST_WORKAROUND(__MWERKS__, <= 0x3003) \
/**/
# include <cstdlib> // rand.
#endif
#include <cstring> // memcpy, strlen.
#include <iterator>
#include <string>
#include <vector>
#if !BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x564)) && \
!BOOST_WORKAROUND(__MWERKS__, <= 0x3003) \
/**/
# include <boost/random/linear_congruential.hpp>
# include <boost/random/uniform_smallint.hpp>
#endif
#include <boost/iostreams/categories.hpp>
#include <boost/iostreams/compose.hpp>
#include <boost/iostreams/copy.hpp>
#include <boost/iostreams/detail/bool_trait_def.hpp>
#include <boost/iostreams/detail/ios.hpp>
#include <boost/iostreams/device/array.hpp>
#include <boost/iostreams/device/back_inserter.hpp>
#include <boost/iostreams/operations.hpp>
#include <boost/mpl/bool.hpp>
#include <boost/type_traits/is_array.hpp>
#include <boost/type_traits/is_same.hpp>
#undef memcpy
#undef rand
#undef strlen
#if defined(BOOST_NO_STDC_NAMESPACE) && !defined(__LIBCOMO__)
namespace std {
using ::memcpy;
using ::strlen;
#if BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x564)) || \
BOOST_WORKAROUND(__MWERKS__, <= 0x3003) \
/**/
using ::rand;
#endif
}
#endif
namespace boost { namespace iostreams {
BOOST_IOSTREAMS_BOOL_TRAIT_DEF(is_string, std::basic_string, 3)
const std::streamsize default_increment = 5;
#if !BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x564)) && \
!BOOST_WORKAROUND(__MWERKS__, <= 0x3003) \
/**/
std::streamsize rand(std::streamsize inc)
{
static rand48 random_gen;
static uniform_smallint<int> random_dist(0, static_cast<int>(inc));
return random_dist(random_gen);
}
#else
std::streamsize rand(std::streamsize inc)
{
return (std::rand() * inc + 1) / RAND_MAX;
}
#endif
class non_blocking_source {
public:
typedef char char_type;
struct category
: source_tag,
peekable_tag
{ };
explicit non_blocking_source( const std::string& data,
std::streamsize inc = default_increment )
: data_(data), inc_(inc), pos_(0)
{ }
std::streamsize read(char* s, std::streamsize n)
{
using namespace std;
if (pos_ == static_cast<streamsize>(data_.size()))
return -1;
streamsize avail =
(std::min) (n, static_cast<streamsize>(data_.size() - pos_));
streamsize amt = (std::min) (rand(inc_), avail);
if (amt)
memcpy(s, data_.c_str() + pos_, static_cast<size_t>(amt));
pos_ += amt;
return amt;
}
bool putback(char c)
{
if (pos_ > 0) {
data_[static_cast<std::string::size_type>(--pos_)] = c;
return true;
}
return false;
}
private:
std::string data_;
std::streamsize inc_, pos_;
};
class non_blocking_sink : public sink {
public:
non_blocking_sink( std::string& dest,
std::streamsize inc = default_increment )
: dest_(dest), inc_(inc)
{ }
std::streamsize write(const char* s, std::streamsize n)
{
std::streamsize amt = (std::min) (rand(inc_), n);
dest_.insert(dest_.end(), s, s + amt);
return amt;
}
private:
non_blocking_sink& operator=(const non_blocking_sink&);
std::string& dest_;
std::streamsize inc_;
};
//--------------Definition of test_input_filter-------------------------------//
template<typename Filter>
bool test_input_filter( Filter filter,
const std::string& input,
const std::string& output,
mpl::true_ )
{
for ( int inc = default_increment;
inc < default_increment * 40;
inc += default_increment )
{
non_blocking_source src(input, inc);
std::string dest;
iostreams::copy(compose(filter, src), iostreams::back_inserter(dest));
if (dest != output)
return false;
}
return true;
}
template<typename Filter, typename Source1, typename Source2>
bool test_input_filter( Filter filter,
const Source1& input,
const Source2& output,
mpl::false_ )
{
std::string in;
std::string out;
iostreams::copy(input, iostreams::back_inserter(in));
iostreams::copy(output, iostreams::back_inserter(out));
return test_input_filter(filter, in, out);
}
template<typename Filter, typename Source1, typename Source2>
bool test_input_filter( Filter filter,
const Source1& input,
const Source2& output )
{
// Use tag dispatch to compensate for bad overload resolution.
return test_input_filter( filter, input, output,
is_string<Source1>() );
}
//--------------Definition of test_output_filter------------------------------//
template<typename Filter>
bool test_output_filter( Filter filter,
const std::string& input,
const std::string& output,
mpl::true_ )
{
for ( int inc = default_increment;
inc < default_increment * 40;
inc += default_increment )
{
array_source src(input.data(), input.data() + input.size());
std::string dest;
iostreams::copy(src, compose(filter, non_blocking_sink(dest, inc)));
if (dest != output )
return false;
}
return true;
}
template<typename Filter, typename Source1, typename Source2>
bool test_output_filter( Filter filter,
const Source1& input,
const Source2& output,
mpl::false_ )
{
std::string in;
std::string out;
iostreams::copy(input, iostreams::back_inserter(in));
iostreams::copy(output, iostreams::back_inserter(out));
return test_output_filter(filter, in, out);
}
template<typename Filter, typename Source1, typename Source2>
bool test_output_filter( Filter filter,
const Source1& input,
const Source2& output )
{
// Use tag dispatch to compensate for bad overload resolution.
return test_output_filter( filter, input, output,
is_string<Source1>() );
}
//--------------Definition of test_filter_pair--------------------------------//
template<typename OutputFilter, typename InputFilter>
bool test_filter_pair( OutputFilter out,
InputFilter in,
const std::string& data,
mpl::true_ )
{
for ( int inc = default_increment;
inc <= default_increment * 40;
inc += default_increment )
{
{
array_source src(data.data(), data.data() + data.size());
std::string temp;
std::string dest;
iostreams::copy(src, compose(out, non_blocking_sink(temp, inc)));
iostreams::copy(
compose(in, non_blocking_source(temp, inc)),
iostreams::back_inserter(dest)
);
if (dest != data)
return false;
}
{
array_source src(data.data(), data.data() + data.size());
std::string temp;
std::string dest;
iostreams::copy(src, compose(out, non_blocking_sink(temp, inc)));
// truncate the file, this should not loop, it may throw
// std::ios_base::failure, which we swallow.
try {
temp.resize(temp.size() / 2);
iostreams::copy(
compose(in, non_blocking_source(temp, inc)),
iostreams::back_inserter(dest)
);
} catch(std::ios_base::failure&) {}
}
{
array_source src(data.data(), data.data() + data.size());
std::string temp;
std::string dest;
iostreams::copy(compose(out, src), non_blocking_sink(temp, inc));
iostreams::copy(
non_blocking_source(temp, inc),
compose(in, iostreams::back_inserter(dest))
);
if (dest != data)
return false;
}
{
array_source src(data.data(), data.data() + data.size());
std::string temp;
std::string dest;
iostreams::copy(compose(out, src), non_blocking_sink(temp, inc));
// truncate the file, this should not loop, it may throw
// std::ios_base::failure, which we swallow.
try {
temp.resize(temp.size() / 2);
iostreams::copy(
non_blocking_source(temp, inc),
compose(in, iostreams::back_inserter(dest))
);
} catch(std::ios_base::failure&) {}
}
}
return true;
}
template<typename OutputFilter, typename InputFilter, typename Source>
bool test_filter_pair( OutputFilter out,
InputFilter in,
const Source& data,
mpl::false_ )
{
std::string str;
iostreams::copy(data, iostreams::back_inserter(str));
return test_filter_pair(out, in, str);
}
template<typename OutputFilter, typename InputFilter, typename Source>
bool test_filter_pair( OutputFilter out,
InputFilter in,
const Source& data )
{
// Use tag dispatch to compensate for bad overload resolution.
return test_filter_pair(out, in, data, is_string<Source>());
}
} } // End namespaces iostreams, boost.
#endif // #ifndef BOOST_IOSTREAMS_FILTER_TEST_HPP_INCLUDED
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