-vector<ConfigLine> parse_config(const string &filename)
-{
- vector<ConfigLine> ret;
-
- FILE *fp = fopen(filename.c_str(), "r");
- if (fp == NULL) {
- perror(filename.c_str());
- exit(1);
- }
-
- char buf[4096];
- while (!feof(fp)) {
- if (fgets(buf, sizeof(buf), fp) == NULL) {
- break;
- }
-
- // Chop off the string at the first #, \r or \n.
- buf[strcspn(buf, "#\r\n")] = 0;
-
- // Remove all whitespace from the end of the string.
- size_t len = strlen(buf);
- while (len > 0 && isspace(buf[len - 1])) {
- buf[--len] = 0;
- }
-
- // If the line is now all blank, ignore it.
- if (len == 0) {
- continue;
- }
-
- vector<string> tokens = split_tokens(buf);
- assert(!tokens.empty());
-
- ConfigLine line;
- line.keyword = tokens[0];
-
- for (size_t i = 1; i < tokens.size(); ++i) {
- // foo=bar is a parameter; anything else is an argument.
- size_t equals_pos = tokens[i].find_first_of('=');
- if (equals_pos == string::npos) {
- line.arguments.push_back(tokens[i]);
- } else {
- string key = tokens[i].substr(0, equals_pos);
- string value = tokens[i].substr(equals_pos + 1, string::npos);
- line.parameters.insert(make_pair(key, value));
- }
- }
-
- ret.push_back(line);
- }
-
- fclose(fp);
- return ret;
-}
-
-string fetch_config_string(const vector<ConfigLine> &config, const string &keyword,
- ParameterType parameter_type, const string &default_value)
-{
- assert(parameter_type == PARAMATER_MANDATORY || parameter_type == PARAMETER_OPTIONAL);
- for (unsigned i = 0; i < config.size(); ++i) {
- if (config[i].keyword != keyword) {
- continue;
- }
- if (config[i].parameters.size() > 0 ||
- config[i].arguments.size() != 1) {
- fprintf(stderr, "ERROR: '%s' takes one argument and no parameters\n", keyword.c_str());
- exit(1);
- }
- return config[i].arguments[0];
- }
- if (parameter_type == PARAMATER_MANDATORY) {
- fprintf(stderr, "ERROR: Missing '%s' statement in config file.\n",
- keyword.c_str());
- exit(1);
- } else {
- return default_value;
- }
-}
-
-int fetch_config_int(const std::vector<ConfigLine> &config, const std::string &keyword,
- int min_limit, int max_limit,
- ParameterType parameter_type, int default_value)
-{
- assert(parameter_type == PARAMATER_MANDATORY || parameter_type == PARAMETER_OPTIONAL);
- bool value_found = false;
- int value = -1;
- for (unsigned i = 0; i < config.size(); ++i) {
- if (config[i].keyword != keyword) {
- continue;
- }
- if (config[i].parameters.size() > 0 ||
- config[i].arguments.size() != 1) {
- fprintf(stderr, "ERROR: '%s' takes one argument and no parameters\n", keyword.c_str());
- exit(1);
- }
- value_found = true;
- value = atoi(config[i].arguments[0].c_str()); // TODO: verify int validity.
- }
- if (!value_found) {
- if (parameter_type == PARAMETER_OPTIONAL) {
- return default_value;
- }
- fprintf(stderr, "ERROR: Missing '%s' statement in config file.\n",
- keyword.c_str());
- exit(1);
- }
- if (value < min_limit || value > max_limit) {
- fprintf(stderr, "ERROR: '%s' is set to %d, must be in [%d,%d]\n",
- keyword.c_str(), value, min_limit, max_limit);
- exit(1);
- }
- return value;
-}
-