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fun_call_performance.cpp
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367 lines (305 loc) · 9.72 KB
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// This file is distributed under the BSD License.
// See "license.txt" for details.
// Copyright 2009-2012, Jonathan Turner ([email protected])
// Copyright 2009-2018, Jason Turner ([email protected])
// http://www.chaiscript.com
// This is an open source non-commercial project. Dear PVS-Studio, please check it.
// PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
#include <iostream>
#include <list>
#include <regex>
#ifdef _MSC_VER
#define _CRT_SECURE_NO_WARNINGS
#endif
#include <chaiscript/chaiscript.hpp>
#ifdef READLINE_AVAILABLE
#include <readline/history.h>
#include <readline/readline.h>
#else
char *mystrdup(const char *s) {
size_t len = strlen(s); // Space for length plus nul
char *d = static_cast<char *>(malloc(len + 1));
if (d == nullptr)
return nullptr; // No memory
#ifdef CHAISCRIPT_MSVC
strcpy_s(d, len + 1, s); // Copy the characters
#else
strncpy(d, s, len); // Copy the characters
#endif
d[len] = '\0';
return d; // Return the new string
}
char *readline(const char *p) {
std::string retval;
std::cout << p;
std::getline(std::cin, retval);
return std::cin.eof() ? nullptr : mystrdup(retval.c_str());
}
void add_history(const char *) {}
void using_history() {}
#endif
void *cast_module_symbol(std::vector<std::string> (*t_path)()) {
union cast_union {
std::vector<std::string> (*in_ptr)();
void *out_ptr;
};
cast_union c;
c.in_ptr = t_path;
return c.out_ptr;
}
std::vector<std::string> default_search_paths() {
std::vector<std::string> paths;
#ifndef CHAISCRIPT_NO_DYNLOAD
#ifdef CHAISCRIPT_WINDOWS // force no unicode
CHAR path[4096];
int size = GetModuleFileNameA(0, path, sizeof(path) - 1);
std::string exepath(path, size);
size_t lastslash = exepath.rfind('\\');
size_t secondtolastslash = exepath.rfind('\\', lastslash - 1);
if (lastslash != std::string::npos) {
paths.push_back(exepath.substr(0, lastslash));
}
if (secondtolastslash != std::string::npos) {
return {exepath.substr(0, secondtolastslash) + "\\lib\\chaiscript\\"};
}
#else
std::string exepath;
std::vector<char> buf(2048);
ssize_t size = -1;
if ((size = readlink("/proc/self/exe", &buf.front(), buf.size())) > 0) {
exepath = std::string(&buf.front(), static_cast<size_t>(size));
}
if (exepath.empty()) {
if ((size = readlink("/proc/curproc/file", &buf.front(), buf.size())) > 0) {
exepath = std::string(&buf.front(), static_cast<size_t>(size));
}
}
if (exepath.empty()) {
if ((size = readlink("/proc/self/path/a.out", &buf.front(), buf.size())) > 0) {
exepath = std::string(&buf.front(), static_cast<size_t>(size));
}
}
if (exepath.empty()) {
Dl_info rInfo;
memset(&rInfo, 0, sizeof(rInfo));
if (!dladdr(cast_module_symbol(&default_search_paths), &rInfo) || !rInfo.dli_fname) {
return paths;
}
exepath = std::string(rInfo.dli_fname);
}
size_t lastslash = exepath.rfind('/');
size_t secondtolastslash = exepath.rfind('/', lastslash - 1);
if (lastslash != std::string::npos) {
paths.push_back(exepath.substr(0, lastslash));
}
if (secondtolastslash != std::string::npos) {
paths.push_back(exepath.substr(0, secondtolastslash) + "/lib/chaiscript/");
}
#endif
#endif // ifndef CHAISCRIPT_NO_DYNLOAD
return paths;
}
void help(int n) {
if (n >= 0) {
std::cout << "ChaiScript evaluator. To evaluate an expression, type it and press <enter>.\n";
std::cout << "Additionally, you can inspect the runtime system using:\n";
std::cout << " dump_system() - outputs all functions registered to the system\n";
std::cout << " dump_object(x) - dumps information about the given symbol\n";
} else {
std::cout << "usage : chai [option]+\n";
std::cout << "option:\n";
std::cout << " -h | --help\n";
std::cout << " -i | --interactive\n";
std::cout << " -c | --command cmd\n";
std::cout << " -v | --version\n";
std::cout << " - --stdin\n";
std::cout << " filepath\n";
}
}
std::string helloWorld(const std::string &t_name) {
return "Hello " + t_name + "!";
}
bool throws_exception(const std::function<void()> &f) {
try {
f();
} catch (...) {
return true;
}
return false;
}
chaiscript::exception::eval_error get_eval_error(const std::function<void()> &f) {
try {
f();
} catch (const chaiscript::exception::eval_error &e) {
return e;
}
throw std::runtime_error("no exception throw");
}
std::string get_next_command() {
std::string retval("quit");
if (!std::cin.eof()) {
char *input_raw = readline("eval> ");
if (input_raw) {
add_history(input_raw);
std::string val(input_raw);
size_t pos = val.find_first_not_of("\t \n");
if (pos != std::string::npos) {
val.erase(0, pos);
}
pos = val.find_last_not_of("\t \n");
if (pos != std::string::npos) {
val.erase(pos + 1, std::string::npos);
}
retval = val;
::free(input_raw);
}
}
if (retval == "quit" || retval == "exit" || retval == "help" || retval == "version") {
retval += "(0)";
}
return retval;
}
// We have to wrap exit with our own because Clang has a hard time with
// function pointers to functions with special attributes (system exit being marked NORETURN)
void myexit(int return_val) {
exit(return_val);
}
void interactive(chaiscript::ChaiScript &chai) {
using_history();
for (;;) {
std::string input = get_next_command();
try {
// evaluate input
chaiscript::Boxed_Value val = chai.eval(input);
// Then, we try to print the result of the evaluation to the user
if (!val.get_type_info().bare_equal(chaiscript::user_type<void>())) {
try {
std::cout << chai.eval<std::function<std::string(const chaiscript::Boxed_Value &bv)>>("to_string")(val) << '\n';
} catch (...) {
} // If we can't, do nothing
}
} catch (const chaiscript::exception::eval_error &ee) {
std::cout << ee.what();
if (ee.call_stack.size() > 0) {
std::cout << "during evaluation at (" << ee.call_stack[0].start().line << ", " << ee.call_stack[0].start().column << ")";
}
std::cout << '\n';
} catch (const std::exception &e) {
std::cout << e.what();
std::cout << std::endl;
}
}
}
int main(int argc, char *argv[]) {
// Disable deprecation warning for getenv call.
#ifdef CHAISCRIPT_MSVC
#pragma warning(push)
#pragma warning(disable : 4996)
#endif
const char *usepath = getenv("CHAI_USE_PATH");
const char *modulepath = getenv("CHAI_MODULE_PATH");
#ifdef CHAISCRIPT_MSVC
#pragma warning(pop)
#endif
std::vector<std::string> usepaths;
usepaths.push_back("");
if (usepath) {
usepaths.push_back(usepath);
}
std::vector<std::string> modulepaths;
std::vector<std::string> searchpaths = default_search_paths();
modulepaths.insert(modulepaths.end(), searchpaths.begin(), searchpaths.end());
modulepaths.push_back("");
if (modulepath) {
modulepaths.push_back(modulepath);
}
// chaiscript::ChaiScript chai(modulepaths, usepaths);
chaiscript::ChaiScript chai(usepaths);
chai.add(chaiscript::fun(&myexit), "exit");
chai.add(chaiscript::fun(&myexit), "quit");
chai.add(chaiscript::fun(&help), "help");
chai.add(chaiscript::fun(&throws_exception), "throws_exception");
chai.add(chaiscript::fun(&get_eval_error), "get_eval_error");
chai.add(chaiscript::fun(&helloWorld), "helloWorld");
clock_t begin = clock();
for (int i = 0; i < 1000; i++) {
std::string str = helloWorld("Bob12345");
fwrite(str.c_str(), 1, str.size(), stdout);
}
clock_t end = clock();
double elapsed_secs = double(end - begin) / CLOCKS_PER_SEC;
// begin = clock();
////for (int i = 0; i < 1000; i++)
////{
//// chai.eval("puts(helloWorld(\"Bob12345\"));");
////}
// chai.eval_file("E:\\C++\\ChaiScript - 5.4.0\\samples\forx.chai");
// end = clock();
// elapsed_secs = double(end - begin) / CLOCKS_PER_SEC;
// printf("**MyProgram::time= %lf\n", elapsed_secs);
for (int i = 0; i < argc; ++i) {
if (i == 0 && argc > 1) {
++i;
}
std::string arg(i ? argv[i] : "--interactive");
enum {
eInteractive,
eCommand,
eFile
} mode
= eCommand;
if (arg == "-c" || arg == "--command") {
if ((i + 1) >= argc) {
std::cout << "insufficient input following " << arg << std::endl;
return EXIT_FAILURE;
} else {
arg = argv[++i];
}
} else if (arg == "-" || arg == "--stdin") {
arg = "";
std::string line;
while (std::getline(std::cin, line)) {
arg += line + '\n';
}
} else if (arg == "-v" || arg == "--version") {
arg = "version()";
} else if (arg == "-h" || arg == "--help") {
arg = "help(-1)";
} else if (arg == "-i" || arg == "--interactive") {
mode = eInteractive;
} else if (arg.find('-') == 0) {
std::cout << "unrecognised argument " << arg << std::endl;
return EXIT_FAILURE;
} else {
mode = eFile;
}
chaiscript::Boxed_Value val;
try {
switch (mode) {
case eInteractive:
interactive(chai);
break;
case eCommand:
val = chai.eval(arg);
break;
case eFile: {
begin = clock();
val = chai.eval_file(arg);
end = clock();
double elapsed_secs1 = double(end - begin) / CLOCKS_PER_SEC;
printf("**C++::time= %.10f\n", elapsed_secs);
printf("**ChaiScript::time= %.10f\n", elapsed_secs1);
break;
}
}
} catch (const chaiscript::exception::eval_error &ee) {
std::cout << ee.pretty_print();
std::cout << std::endl;
return EXIT_FAILURE;
} catch (std::exception &e) {
std::cout << e.what() << std::endl;
return EXIT_FAILURE;
}
}
return EXIT_SUCCESS;
}