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///////////////////////////////////////////////////////////////
// Copyright 2015 John Maddock. 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_
//
#include "performance.hpp"
#include <list>
#include <fstream>
#include <iostream>
#include <iomanip>
#include <boost/chrono.hpp>
#include <boost/detail/lightweight_main.hpp>
#include <boost/regex.hpp>
#include <boost/filesystem.hpp>
void load_file(std::string& text, const char* file)
{
std::deque<char> temp_copy;
std::ifstream is(file);
if(!is.good())
{
std::string msg("Unable to open file: \"");
msg.append(file);
msg.append("\"");
throw std::runtime_error(msg);
}
is.seekg(0, std::ios_base::end);
std::istream::pos_type pos = is.tellg();
is.seekg(0, std::ios_base::beg);
text.erase();
text.reserve(pos);
std::istreambuf_iterator<char> it(is);
std::copy(it, std::istreambuf_iterator<char>(), std::back_inserter(text));
}
typedef std::list<boost::shared_ptr<abstract_regex> > list_type;
list_type& engines()
{
static list_type l;
return l;
}
void abstract_regex::register_instance(boost::shared_ptr<abstract_regex> item)
{
engines().push_back(item);
}
template <class Clock>
struct stopwatch
{
typedef typename Clock::duration duration;
stopwatch()
{
m_start = Clock::now();
}
duration elapsed()
{
return Clock::now() - m_start;
}
void reset()
{
m_start = Clock::now();
}
private:
typename Clock::time_point m_start;
};
unsigned sum = 0;
unsigned last_value_returned = 0;
template <class Func>
double exec_timed_test(Func f)
{
double t = 0;
unsigned repeats = 1;
do {
stopwatch<boost::chrono::high_resolution_clock> w;
for(unsigned count = 0; count < repeats; ++count)
{
last_value_returned = f();
sum += last_value_returned;
}
t = boost::chrono::duration_cast<boost::chrono::duration<double>>(w.elapsed()).count();
if(t < 0.5)
repeats *= 2;
} while(t < 0.5);
return t / repeats;
}
std::string format_expression_as_quickbook(std::string s)
{
static const boost::regex e("[`/_*=$^@#&%\\\\]");
static const boost::regex open_b("\\[");
static const boost::regex close_b("\\]");
s = regex_replace(s, e, "\\\\$0");
s = regex_replace(s, open_b, "\\\\u005B");
s = regex_replace(s, close_b, "\\\\u005D");
if(s.size() > 200)
{
s.erase(200);
s += " ...";
}
return "[^" + s + "]";
}
void test_match(const char* expression, const char* text, bool isperl = false)
{
std::string table = "Testing simple " + (isperl ? std::string("Perl") : std::string("leftmost-longest")) + " matches (platform = " + platform_name() + ", compiler = " + compiler_name() + ")";
std::string row = format_expression_as_quickbook(expression);
row += "[br]";
row += format_expression_as_quickbook(text);
for(list_type::const_iterator i = engines().begin(); i != engines().end(); ++i)
{
std::string heading = (*i)->name();
if((*i)->set_expression(expression, isperl))
{
double time = exec_timed_test([&]() { return (*i)->match_test(text) ? 1 : 0; });
report_execution_time(time, table, row, heading);
}
}
}
void test_search(const char* expression, const char* text, bool isperl = false, const char* filename = 0)
{
std::string table = "Testing " + (isperl ? std::string("Perl") : std::string("leftmost-longest")) + " searches (platform = " + platform_name() + ", compiler = " + compiler_name() + ")";
std::string row = format_expression_as_quickbook(expression);
row += "[br]";
if(filename)
{
row += "In file: ";
row += filename;
}
else
{
row += format_expression_as_quickbook(text);
}
for(list_type::const_iterator i = engines().begin(); i != engines().end(); ++i)
{
std::string heading = (*i)->name();
if((*i)->set_expression(expression, isperl))
{
double time = exec_timed_test([&]() { return (*i)->find_all(text); });
report_execution_time(time, table, row, heading);
std::cout << "Search with library: " << heading << " found " << last_value_returned << " occurrences.\n";
}
}
}
int cpp_main(int argc, char* argv[])
{
boost::filesystem::path here(__FILE__);
here = here.parent_path().parent_path().parent_path().parent_path();
boost::filesystem::path cpp_file = here / "boost";
cpp_file /= "crc.hpp";
// start with a simple test, this is basically a measure of the minimal overhead
// involved in calling a regex matcher:
test_match("abc", "abc");
// these are from the regex docs:
test_match("^([0-9]+)(\\-| |$)(.*)$", "100- this is a line of ftp response which contains a message string");
test_match("([[:digit:]]{4}[- ]){3}[[:digit:]]{3,4}", "1234-5678-1234-456");
// these are from http://www.regxlib.com/
test_match("^([a-zA-Z0-9_\\-\\.]+)@((\\[[0-9]{1,3}\\.[0-9]{1,3}\\.[0-9]{1,3}\\.)|(([a-zA-Z0-9\\-]+\\.)+))([a-zA-Z]{2,4}|[0-9]{1,3})(\\]?)$", "john@johnmaddock.co.uk");
test_match("^([a-zA-Z0-9_\\-\\.]+)@((\\[[0-9]{1,3}\\.[0-9]{1,3}\\.[0-9]{1,3}\\.)|(([a-zA-Z0-9\\-]+\\.)+))([a-zA-Z]{2,4}|[0-9]{1,3})(\\]?)$", "foo12@foo.edu");
test_match("^([a-zA-Z0-9_\\-\\.]+)@((\\[[0-9]{1,3}\\.[0-9]{1,3}\\.[0-9]{1,3}\\.)|(([a-zA-Z0-9\\-]+\\.)+))([a-zA-Z]{2,4}|[0-9]{1,3})(\\]?)$", "bob.smith@foo.tv");
test_match("^[a-zA-Z]{1,2}[0-9][0-9A-Za-z]{0,1} {0,1}[0-9][A-Za-z]{2}$", "EH10 2QQ");
test_match("^[a-zA-Z]{1,2}[0-9][0-9A-Za-z]{0,1} {0,1}[0-9][A-Za-z]{2}$", "G1 1AA");
test_match("^[a-zA-Z]{1,2}[0-9][0-9A-Za-z]{0,1} {0,1}[0-9][A-Za-z]{2}$", "SW1 1ZZ");
test_match("^[[:digit:]]{1,2}/[[:digit:]]{1,2}/[[:digit:]]{4}$", "4/1/2001");
test_match("^[[:digit:]]{1,2}/[[:digit:]]{1,2}/[[:digit:]]{4}$", "12/12/2001");
test_match("^[-+]?[[:digit:]]*\\.?[[:digit:]]*$", "123");
test_match("^[-+]?[[:digit:]]*\\.?[[:digit:]]*$", "+3.14159");
test_match("^[-+]?[[:digit:]]*\\.?[[:digit:]]*$", "-3.14159");
// start with a simple test, this is basically a measure of the minimal overhead
// involved in calling a regex matcher:
test_match("abc", "abc", true);
// these are from the regex docs:
test_match("^([0-9]+)(\\-| |$)(.*)$", "100- this is a line of ftp response which contains a message string", true);
test_match("([[:digit:]]{4}[- ]){3}[[:digit:]]{3,4}", "1234-5678-1234-456", true);
// these are from http://www.regxlib.com/
test_match("^([a-zA-Z0-9_\\-\\.]+)@((\\[[0-9]{1,3}\\.[0-9]{1,3}\\.[0-9]{1,3}\\.)|(([a-zA-Z0-9\\-]+\\.)+))([a-zA-Z]{2,4}|[0-9]{1,3})(\\]?)$", "john@johnmaddock.co.uk", true);
test_match("^([a-zA-Z0-9_\\-\\.]+)@((\\[[0-9]{1,3}\\.[0-9]{1,3}\\.[0-9]{1,3}\\.)|(([a-zA-Z0-9\\-]+\\.)+))([a-zA-Z]{2,4}|[0-9]{1,3})(\\]?)$", "foo12@foo.edu", true);
test_match("^([a-zA-Z0-9_\\-\\.]+)@((\\[[0-9]{1,3}\\.[0-9]{1,3}\\.[0-9]{1,3}\\.)|(([a-zA-Z0-9\\-]+\\.)+))([a-zA-Z]{2,4}|[0-9]{1,3})(\\]?)$", "bob.smith@foo.tv", true);
test_match("^[a-zA-Z]{1,2}[0-9][0-9A-Za-z]{0,1} {0,1}[0-9][A-Za-z]{2}$", "EH10 2QQ", true);
test_match("^[a-zA-Z]{1,2}[0-9][0-9A-Za-z]{0,1} {0,1}[0-9][A-Za-z]{2}$", "G1 1AA", true);
test_match("^[a-zA-Z]{1,2}[0-9][0-9A-Za-z]{0,1} {0,1}[0-9][A-Za-z]{2}$", "SW1 1ZZ", true);
test_match("^[[:digit:]]{1,2}/[[:digit:]]{1,2}/[[:digit:]]{4}$", "4/1/2001", true);
test_match("^[[:digit:]]{1,2}/[[:digit:]]{1,2}/[[:digit:]]{4}$", "12/12/2001", true);
test_match("^[-+]?[[:digit:]]*\\.?[[:digit:]]*$", "123", true);
test_match("^[-+]?[[:digit:]]*\\.?[[:digit:]]*$", "+3.14159", true);
test_match("^[-+]?[[:digit:]]*\\.?[[:digit:]]*$", "-3.14159", true);
std::string file_contents;
const char* highlight_expression = // preprocessor directives: index 1
"(^[ \\t]*#(?:(?>[^\\\\\\n]+)|\\\\(?>\\s*\\n|.))*)|";
// comment: index 2
"(//[^\\n]*|/\\*.*?\\*/)|"
// literals: index 3
"\\<([+-]?(?:(?:0x[[:xdigit:]]+)|(?:(?:[[:digit:]]*\\.)?[[:digit:]]+(?:[eE][+-]?[[:digit:]]+)?))u?(?:(?:int(?:8|16|32|64))|L)?)\\>|"
// string literals: index 4
"('(?:[^\\\\']|\\\\.)*'|\"(?:[^\\\\\"]|\\\\.)*\")|"
// keywords: index 5
"\\<(__asm|__cdecl|__declspec|__export|__far16|__fastcall|__fortran|__import"
"|__pascal|__rtti|__stdcall|_asm|_cdecl|__except|_export|_far16|_fastcall"
"|__finally|_fortran|_import|_pascal|_stdcall|__thread|__try|asm|auto|bool"
"|break|case|catch|cdecl|char|class|const|const_cast|continue|default|delete"
"|do|double|dynamic_cast|else|enum|explicit|extern|false|float|for|friend|goto"
"|if|inline|int|long|mutable|namespace|new|operator|pascal|private|protected"
"|public|register|reinterpret_cast|return|short|signed|sizeof|static|static_cast"
"|struct|switch|template|this|throw|true|try|typedef|typeid|typename|union|unsigned"
"|using|virtual|void|volatile|wchar_t|while)\\>"
;
const char* class_expression = "(template[[:space:]]*<[^;:{]+>[[:space:]]*)?"
"(class|struct)[[:space:]]*(\\w+([ \t]*\\([^)]*\\))?"
"[[:space:]]*)*(\\w*)[[:space:]]*(<[^;:{]+>[[:space:]]*)?"
"(\\{|:[^;\\{()]*\\{)";
const char* call_expression = "\\w+\\s*(\\([^()]++(?:(?1)[^()]++)*+[^)]*\\))";
const char* include_expression = "^[ \t]*#[ \t]*include[ \t]+(\"[^\"]+\"|<[^>]+>)";
const char* boost_include_expression = "^[ \t]*#[ \t]*include[ \t]+(\"boost/[^\"]+\"|<boost/[^>]+>)";
const char* brace_expression = "\\{[^{}]++((?0)[^{}]++)*+[^}]*+\\}";
const char* function_with_body_expression = "(\\w+)\\s*(\\([^()]++(?:(?2)[^()]++)*+[^)]*\\))\\s*(\\{[^{}]++((?3)[^{}]++)*+[^}]*+\\})";
load_file(file_contents, "../../../libs/libraries.htm");
test_search("Beman|John|Dave", file_contents.c_str(), false, "../../../libs/libraries.htm");
test_search("Beman|John|Dave", file_contents.c_str(), true, "../../../libs/libraries.htm");
test_search("(?i)<p>.*?</p>", file_contents.c_str(), true, "../../../libs/libraries.htm");
test_search("<a[^>]+href=(\"[^\"]*\"|[^[:space:]]+)[^>]*>", file_contents.c_str(), false, "../../../libs/libraries.htm");
test_search("(?i)<a[^>]+href=(\"[^\"]*\"|[^[:space:]]+)[^>]*>", file_contents.c_str(), true, "../../../libs/libraries.htm");
test_search("(?i)<h[12345678][^>]*>.*?</h[12345678]>", file_contents.c_str(), true, "../../../libs/libraries.htm");
test_search("<img[^>]+src=(\"[^\"]*\"|[^[:space:]]+)[^>]*>", file_contents.c_str(), false, "../../../libs/libraries.htm");
test_search("(?i)<img[^>]+src=(\"[^\"]*\"|[^[:space:]]+)[^>]*>", file_contents.c_str(), true, "../../../libs/libraries.htm");
test_search("(?i)<font[^>]+face=(\"[^\"]*\"|[^[:space:]]+)[^>]*>.*?</font>", file_contents.c_str(), true, "../../../libs/libraries.htm");
load_file(file_contents, "../../../boost/multiprecision/number.hpp");
test_search(function_with_body_expression, file_contents.c_str(), true, "boost/multiprecision/number.hpp");
test_search(brace_expression, file_contents.c_str(), true, "boost/multiprecision/number.hpp");
test_search(call_expression, file_contents.c_str(), true, "boost/multiprecision/number.hpp");
test_search(highlight_expression, file_contents.c_str(), true, "boost/multiprecision/number.hpp");
test_search(class_expression, file_contents.c_str(), true, "boost/multiprecision/number.hpp");
test_search(include_expression, file_contents.c_str(), true, "boost/multiprecision/number.hpp");
test_search(boost_include_expression, file_contents.c_str(), true, "boost/multiprecision/number.hpp");
return 0;
}
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