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Merge from trunk (now lexical_cast has optimized conversions to and from array<>, fixes #7065)

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[SVN r79364]
This commit is contained in:
Antony Polukhin
2012-07-08 18:06:32 +00:00
parent 79d6468aeb
commit 675d0bb451
9 changed files with 1670 additions and 917 deletions
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perf/performance_test.cpp
+46 -1
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@@ -13,6 +13,7 @@
#define BOOST_CHRONO_HEADER_ONLY
#include <boost/lexical_cast.hpp>
#include <boost/chrono.hpp>
#include <fstream>
#include <cstring>
@@ -21,6 +22,13 @@
// File to output data
std::fstream fout;
namespace boost {
inline std::istream& operator>> (std::istream& in, boost::array<char,50>& res) {
in >> res.begin();
return in;
}
}
template <class OutT, class InT>
static inline void test_lexical(const InT& in_val) {
OutT out_val = boost::lexical_cast<OutT>(in_val);
@@ -37,6 +45,28 @@ static inline void test_ss_constr(const InT& in_val) {
if (ss.fail()) throw std::logic_error("descr");
}
template <class OutT, class CharT, std::size_t N>
static inline void test_ss_constr(const boost::array<CharT, N>& in_val) {
OutT out_val;
std::stringstream ss;
ss << in_val.begin();
if (ss.fail()) throw std::logic_error("descr");
ss >> out_val;
if (ss.fail()) throw std::logic_error("descr");
}
template <class OutT, class StringStreamT, class CharT, std::size_t N>
static inline void test_ss_noconstr(StringStreamT& ss, const boost::array<CharT, N>& in_val) {
OutT out_val;
ss << in_val.begin(); // ss is an instance of std::stringstream
if (ss.fail()) throw std::logic_error("descr");
ss >> out_val;
if (ss.fail()) throw std::logic_error("descr");
/* reseting std::stringstream to use it again */
ss.str(std::string());
ss.clear();
}
template <class OutT, class StringStreamT, class InT>
static inline void test_ss_noconstr(StringStreamT& ss, const InT& in_val) {
OutT out_val;
@@ -64,6 +94,12 @@ struct structure_sprintf {
};
struct structure_sscanf {
template <class OutT, class BufferT, class CharT, std::size_t N>
static inline void test(BufferT* /*buffer*/, const boost::array<CharT, N>& in_val, const char* const conv) {
OutT out_val;
sscanf(in_val.cbegin(), conv, &out_val);
}
template <class OutT, class BufferT, class InT>
static inline void test(BufferT* /*buffer*/, const InT& in_val, const char* const conv) {
OutT out_val;
@@ -229,7 +265,7 @@ void string_like_test_set(const std::string& from) {
perf_test<float, ssc_t>(from + "->float", conv("1.123"), "%f");
perf_test<double, ssc_t>(from + "->double", conv("1.123"), "%lf");
perf_test<long double, ssc_t>(from + "->long double", conv("1.123"), "%Lf");
perf_test<boost::array<char, 50>, ssc_t>(from + "->array<char, 50>", conv("1.123"), "%s");
perf_test<std::string, structure_fake>(from + "->string", conv("string"), "%Lf");
perf_test<boost::container::string, structure_fake>(from + "->container::string"
@@ -268,6 +304,14 @@ struct to_iterator_range {
}
};
struct to_array_50 {
boost::array<char, 50> operator()(const char* const c) const {
boost::array<char, 50> ret;
std::strcpy(ret.begin(), c);
return ret;
}
};
int main(int argc, char** argv) {
BOOST_ASSERT(argc >= 2);
std::string output_path(argv[1]);
@@ -310,6 +354,7 @@ int main(int argc, char** argv) {
string_like_test_set<to_uchar_conv>("unsigned char*");
string_like_test_set<to_schar_conv>("signed char*");
string_like_test_set<to_iterator_range>("iterator_range<char*>");
string_like_test_set<to_array_50>("array<char, 50>");
perf_test<int, structure_fake>("int->int", 100, "");
perf_test<double, structure_fake>("float->double", 100.0f, "");