libetherpix

begin of config file parsing
Parent d258db0
Stefan Schuermans

Stefan Schuermans commited on 2017-06-08 19:55:08
Showing 3 changed files, with 264 additions and 2 deletions.

simulator/config.cpp
View file @ 680076d
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@@ -0,0 +1,183 @@
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+/*
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+ * EtherPix simulator
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+ *
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+ * Copyright 2017 Stefan Schuermans <stefan schuermans info>
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+ *
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+ * This program is free software: you can redistribute it and/or modify
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+ * it under the terms of the GNU General Public License as published by
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+ * the Free Software Foundation, version 3 of the License.
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+ *
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+ *
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+ * This program is distributed in the hope that it will be useful,
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+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
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+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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+ * GNU General Public License for more details.
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+ *
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+ * You should have received a copy of the GNU Lesser General Public License
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+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
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+ */
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+
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+#include <algorithm>
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+#include <cctype>
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+#include <functional>
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+#include <fstream>
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+#include <stdexcept>
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+#include <sstream>
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+#include <string>
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+
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+#include "config.h"
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+
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+/**
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+ * @brief constructor
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+ * @param[in] configFile name of config file
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+ */
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+Config::Config(std::string const &configFile)
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+{
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+  readFile(configFile);
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+}
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+
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+/**
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+ * @brief remove whitespace at beging and end of string
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+ * @param[in,out] str string to process
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+ */
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+void Config::trim(std::string &str)
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+{
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+  // remove leading whitespace
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+  str.erase(str.begin(),
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+            std::find_if(str.begin(), str.end(),
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+                         std::not1(std::ptr_fun<int, int>(std::isspace))));
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+
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+  // remove trailing whitespace
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+  str.erase(std::find_if(str.rbegin(), str.rend(),
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+                         std::not1(std::ptr_fun<int, int>(std::isspace))).base(),
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+            str.end());
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+}
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+
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+/**
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+ * @brief split string at sequences of whitespace
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+ * @param[in] str string to split
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+ * @param[out] fields fields of string
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+ */
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+void Config::split(std::string const &str, std::vector<std::string> &fields)
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+{
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+  std::stringstream strm(str);
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+  fields.clear();
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+  while (! strm.eof()) {
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+    std::string field;
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+    strm >> field;
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+    if (! field.empty()) {
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+      fields.push_back(field);
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+    }
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+  }
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+}
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+
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+/**
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+ * @brief read config file
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+ * @param[in] configFile name of config file
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+ * @throws std::exception in case of error
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+ */
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+void Config::readFile(std::string const &configFile)
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+{
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+  // open file
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+  std::ifstream cf(configFile.c_str(), std::ios::in);
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+  if (! cf.is_open()) {
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+    std::stringstream msg;
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+    msg << "cannot open config file \"" << configFile <<  "\" for reading";
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+    throw std::runtime_error(msg.str());
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+  }
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+
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+  // read lines and process them
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+  std::string line;
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+  size_t no;
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+  for (no = 1; std::getline(cf, line); ++no) {
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+    // process line
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+    try {
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+      procLine(line);
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+    } catch (std::exception &ex) {
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+      std::stringstream msg;
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+      msg << "error in line " << no << " of config file \"" << configFile
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+          << "\": " << ex.what();
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+      throw std::runtime_error(msg.str());
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+    }
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+  }
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+
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+  // close file
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+  cf.close();
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+}
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+
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+/**
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+ * @brief process line from config file
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+ * @param[in] line line to process
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+ * @throws std::exception in case of error
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+ */
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+void Config::procLine(std::string line)
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+{
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+  // remove comment ("# ...")
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+  size_t commentStart = line.find("#");
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+  if (commentStart != std::string::npos) {
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+    line.erase(commentStart);
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+  }
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+
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+  trim(line);
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+
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+  // ignore empty lines
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+  if (line.empty()) {
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+    return;
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+  }
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+
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+  // split line at equal sign
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+  size_t equalSign = line.find("=");
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+  if (equalSign == std::string::npos) {
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+    std::stringstream msg;
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+    msg << "no equal sign found in \"" << line << "\"";
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+    throw std::runtime_error(msg.str());
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+  }
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+  std::string setting = line.substr(0, equalSign);
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+  std::string value = line.substr(equalSign + 1);
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+  trim(setting);
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+  trim(value);
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+
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+  procSetting(setting, value);
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+}
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+
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+/**
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+ * @brief process setting from config file
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+ * @param[in] setting name of the setting
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+ * @param[in] value value for setting
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+ * @throws std::exception in case of error
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+ */
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+void Config::procSetting(std::string const &setting, std::string const &value)
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+{
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+  std::vector<std::string> setFields, valFields;
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+  split(setting, setFields);
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+  split(value, valFields);
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+
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+  // empty setting
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+  if (setFields.size() < 1) {
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+    throw std::runtime_error("empty setting name");
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+  }
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+
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+  // distributor
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+  if (setFields[0] == "distributor") {
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+    // TODO
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+  }
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+  // distributor address
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+  else if (setFields[0] == "distributorAddr") {
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+    // TODO
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+  }
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+  // mapping
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+  else if (setFields[0] == "mapping") {
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+    // TODO
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+  }
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+  // output
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+  else if (setFields[0] == "output") {
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+    // TODO
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+  }
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+  // unknown setting
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+  else {
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+    std::stringstream msg;
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+    msg << "unknown setting \"" << setting << "\"";
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+    throw std::runtime_error(msg.str());
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+  }
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+}
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+
simulator/config.h
View file @ 680076d
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@@ -0,0 +1,75 @@
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+/*
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+ * EtherPix simulator
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+ *
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+ * Copyright 2017 Stefan Schuermans <stefan schuermans info>
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+ *
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+ * This program is free software: you can redistribute it and/or modify
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+ * it under the terms of the GNU General Public License as published by
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+ * the Free Software Foundation, version 3 of the License.
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+ *
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+ *
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+ * This program is distributed in the hope that it will be useful,
12 
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14 
+ * GNU General Public License for more details.
15 
+ *
16 
+ * You should have received a copy of the GNU Lesser General Public License
17 
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
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+ */
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+
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+#ifndef CONFIG_H
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+#define CONFIG_H
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+
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+#include <string>
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+#include <vector>
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+
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+/// config file
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+class Config
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+{
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+public:
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+  /**
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+   * @brief constructor
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+   * @param[in] configFile name of config file
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+   */
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+  Config(std::string const &configFile);
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+
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+protected:
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+  /**
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+   * @brief remove whitespace at beging and end of string
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+   * @param[in,out] str string to process
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+   */
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+  static void trim(std::string &str);
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+
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+  /**
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+   * @brief split string at sequences of whitespace
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+   * @param[in] str string to split
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+   * @param[out] fields fields of string
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+   */
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+  static void split(std::string const &str, std::vector<std::string> &fields);
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+
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+  /**
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+   * @brief read config file
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+   * @param[in] configFile name of config file
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+   * @throws std::exception in case of error
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+   */
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+  void readFile(std::string const &configFile);
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+
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+  /**
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+   * @brief process line from config file
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+   * @param[in] line line to process
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+   * @throws std::exception in case of error
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+   */
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+  void procLine(std::string line);
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+
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+  /**
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+   * @brief process setting from config file
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+   * @param[in] setting name of the setting
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+   * @param[in] value value for setting
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+   * @throws std::exception in case of error
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+   */
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+  void procSetting(std::string const &setting, std::string const &value);
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+
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+};
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+
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+#endif // #ifndef CONFIG_H
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+
simulator/main.cpp
View file @ 680076d
... ... 
@@ -21,6 +21,7 @@
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 #include <iostream>
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 #include <string.h>
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+#include "config.h"
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 #include "etherpix_sim.glade.h"
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 #include "main_window.h"
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... ... 
@@ -34,10 +35,13 @@ int main(int argc, char *argv[])
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     std::cerr << "usage: " << argv[0] << " <sim_config.etps>" << std::endl;
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     return 2;
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   }
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-  char *config_file_name = argv[1];
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+  char *configFile = argv[1];
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   try {
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+    // parse config file
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+    Config config(configFile);
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+
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     // create window
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     Glib::RefPtr<Gtk::Builder> builder =
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       Gtk::Builder::create_from_string(widgets_etherpix_sim);
... ... 
@@ -47,7 +51,7 @@ int main(int argc, char *argv[])
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     builder->get_widget_derived("MainWindow", mainWindow);
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     // append config file name to window title
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-    mainWindow->set_title(mainWindow->get_title() + " - " + config_file_name);
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+    mainWindow->set_title(mainWindow->get_title() + " - " + configFile);
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     // run GTK main loop
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     Gtk::Main::run();
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