/**
* Copyright (c) 2018 Cornell University.
*
* Author: Ted Yin <tederminant@gmail.com>
*
* Permission is hereby granted, free of charge, to any person obtaining a copy of
* this software and associated documentation files (the "Software"), to deal in
* the Software without restriction, including without limitation the rights to
* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
* of the Software, and to permit persons to whom the Software is furnished to do
* so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#include <cstdarg>
#include <cstring>
#include <cassert>
#include <cstdio>
#include <ctime>
#include <sys/time.h>
#include <cmath>
#include <event2/event.h>
#include "salticidae/util.h"
namespace salticidae {
void sec2tv(double t, struct timeval &tv) {
tv.tv_sec = trunc(t);
tv.tv_usec = trunc((t - tv.tv_sec) * 1e6);
}
void event_add_with_timeout(struct event *ev, double timeout) {
struct timeval tv;
tv.tv_sec = trunc(timeout);
tv.tv_usec = trunc((timeout - tv.tv_sec) * 1e6);
event_add(ev, &tv);
}
const std::string get_current_datetime() {
/* credit: http://stackoverflow.com/a/41381479/544806 */
char fmt[64], buf[64];
struct timeval tv;
gettimeofday(&tv, nullptr);
struct tm *tmp = localtime(&tv.tv_sec);
strftime(fmt, sizeof fmt, "%Y-%m-%d %H:%M:%S.%%06u", tmp);
snprintf(buf, sizeof buf, fmt, tv.tv_usec);
return std::string(buf);
}
SalticidaeError::SalticidaeError() : msg("unknown") {}
SalticidaeError::SalticidaeError(const std::string &fmt, ...) {
int guessed_size = 128;
std::string buff;
va_list ap;
for (;;)
{
buff.resize(guessed_size);
va_start(ap, fmt);
int nwrote = vsnprintf((char *)buff.data(), guessed_size, fmt.c_str(), ap);
if (nwrote < 0 || nwrote == guessed_size)
{
guessed_size <<= 1;
continue;
}
buff.resize(nwrote);
msg = std::move(buff);
break;
}
}
SalticidaeError::operator std::string() const {
return msg;
}
void Logger::write(const char *tag, const char *fmt, va_list ap) {
fprintf(output, "%s [%s %s] ", get_current_datetime().c_str(), prefix, tag);
vfprintf(output, fmt, ap);
fprintf(output, "\n");
}
void Logger::debug(const char *fmt, ...) {
va_list ap;
va_start(ap, fmt);
write("debug", fmt, ap);
va_end(ap);
}
void Logger::info(const char *fmt, ...) {
va_list ap;
va_start(ap, fmt);
write("info", fmt, ap);
va_end(ap);
}
void Logger::warning(const char *fmt, ...) {
va_list ap;
va_start(ap, fmt);
write("warn", fmt, ap);
va_end(ap);
}
void Logger::error(const char *fmt, ...) {
va_list ap;
va_start(ap, fmt);
write("error", fmt, ap);
va_end(ap);
}
Logger logger("salticidae");
void ElapsedTime::start() {
struct timezone tz;
gettimeofday(&t0, &tz);
cpu_t0 = clock();
}
void ElapsedTime::stop(bool show_info) {
struct timeval t1;
struct timezone tz;
gettimeofday(&t1, &tz);
cpu_elapsed_sec = (float)clock() / CLOCKS_PER_SEC -
(float)cpu_t0 / CLOCKS_PER_SEC;
elapsed_sec = (t1.tv_sec + t1.tv_usec * 1e-6) -
(t0.tv_sec + t0.tv_usec * 1e-6);
if (show_info)
SALTICIDAE_LOG_INFO("elapsed: %.3f (wall) %.3f (cpu)",
elapsed_sec, cpu_elapsed_sec);
}
Config::Opt::Opt(const std::string &optname, OptVal *optval, Action action, int idx): \
optname(optname), optval(optval), action(action) {
opt.name = this->optname.c_str();
opt.has_arg = action == SWITCH_ON ? no_argument : required_argument;
opt.flag = nullptr;
opt.val = idx;
}
void Config::add_opt(const std::string &optname, OptVal *optval, Action action) {
if (conf.count(optname))
throw SalticidaeError("option name already exists");
auto it = conf.insert(
std::make_pair(optname,
Opt(optname, optval, action, getopt_order.size()))).first;
getopt_order.push_back(&it->second);
}
std::string trim(const std::string &str,
const std::string &space = "\t\r\n ") {
const auto new_begin = str.find_first_not_of(space);
if (new_begin == std::string::npos)
return "";
const auto new_end = str.find_last_not_of(space);
return str.substr(new_begin, new_end - new_begin + 1);
}
void Config::update(Opt &p, const char *optval) {
switch (p.action)
{
case SWITCH_ON: p.optval->switch_on(); break;
case SET_VAL: p.optval->set_val(optval); break;
case APPEND: p.optval->append(optval); break;
default:
throw SalticidaeError("unknown action");
}
}
void Config::update(const std::string &optname, const char *optval) {
assert(conf.count(optname));
update(conf.find(optname)->second, optval);
}
bool Config::load(const std::string &fname) {
static const size_t BUFF_SIZE = 1024;
FILE *conf_f = fopen(fname.c_str(), "r");
char buff[BUFF_SIZE];
/* load configuration from file */
if (conf_f)
{
while (fgets(buff, BUFF_SIZE, conf_f))
{
if (strlen(buff) == BUFF_SIZE - 1)
{
fclose(conf_f);
throw SalticidaeError("configuration file line too long");
}
std::string line(buff);
size_t pos = line.find("=");
if (pos == std::string::npos)
continue;
std::string optname = trim(line.substr(0, pos));
std::string optval = trim(line.substr(pos + 1));
if (!conf.count(optname))
{
SALTICIDAE_LOG_WARN("ignoring option name in conf file: %s",
optname.c_str());
continue;
}
update(optname, optval.c_str());
}
return true;
}
else
return false;
}
size_t Config::parse(int argc, char **argv) {
if (load(conf_fname))
SALTICIDAE_LOG_INFO("loaded configuration from %s", conf_fname.c_str());
size_t nopts = getopt_order.size();
struct option *longopts = (struct option *)malloc(
sizeof(struct option) * (nopts + 1));
int ind;
for (size_t i = 0;