-/* Copyright (c) 2016. The SimGrid Team.
- * All rights reserved. */
+/* Copyright (c) 2004-2017. The SimGrid Team. All rights reserved. */
/* This program is free software; you can redistribute it and/or modify it
* under the terms of the license (GNU LGPL) which comes with this package. */
+#include <cstdio>
+
+#include <algorithm>
+#include <cerrno>
+#include <cstring>
+#include <climits>
+
#include <functional>
+#include <stdexcept>
#include <string>
+#include <typeinfo>
+#include <type_traits>
+#include <vector>
+#include <xbt/ex.hpp>
#include <xbt/config.h>
#include <xbt/config.hpp>
+#include "xbt/misc.h"
+#include "xbt/sysdep.h"
+#include "xbt/log.h"
+#include "xbt/ex.h"
+#include "xbt/dynar.h"
+#include "xbt/dict.h"
+
+// *****
+
+XBT_LOG_NEW_DEFAULT_SUBCATEGORY(xbt_cfg, xbt, "configuration support");
+
+XBT_EXPORT_NO_IMPORT(xbt_cfg_t) simgrid_config = nullptr;
+extern "C" {
+ XBT_PUBLIC(void) sg_config_finalize();
+}
namespace simgrid {
namespace config {
-static void callCallback(const char* name, void* data)
+missing_key_error::~missing_key_error() = default;
+
+class Config;
+
+namespace {
+
+const char* true_values[] = {
+ "yes", "on", "true", "1"
+};
+const char* false_values[] = {
+ "no", "off", "false", "0"
+};
+
+static bool parseBool(const char* value)
+{
+ for (const char* true_value : true_values)
+ if (std::strcmp(true_value, value) == 0)
+ return true;
+ for (const char* false_value : false_values)
+ if (std::strcmp(false_value, value) == 0)
+ return false;
+ throw std::range_error("not a boolean");
+}
+
+static double parseDouble(const char* value)
+{
+ char* end;
+ errno = 0;
+ double res = std::strtod(value, &end);
+ if (errno == ERANGE)
+ throw std::range_error("out of range");
+ else if (errno)
+ xbt_die("Unexpected errno");
+ if (end == value || *end != '\0')
+ throw std::range_error("invalid double");
+ else
+ return res;
+}
+
+static long int parseLong(const char* value)
+{
+ char* end;
+ errno = 0;
+ long int res = std::strtol(value, &end, 0);
+ if (errno) {
+ if (res == LONG_MIN && errno == ERANGE)
+ throw std::range_error("underflow");
+ else if (res == LONG_MAX && errno == ERANGE)
+ throw std::range_error("overflow");
+ xbt_die("Unexpected errno");
+ }
+ if (end == value || *end != '\0')
+ throw std::range_error("invalid integer");
+ else
+ return res;
+}
+
+// ***** ConfigType *****
+
+/// A trait which define possible options types:
+template<class T> struct ConfigType;
+
+template<> struct ConfigType<int> {
+ static constexpr const char* type_name = "int";
+ static inline double parse(const char* value)
+ {
+ return parseLong(value);
+ }
+};
+template<> struct ConfigType<double> {
+ static constexpr const char* type_name = "double";
+ static inline double parse(const char* value)
+ {
+ return parseDouble(value);
+ }
+};
+template<> struct ConfigType<std::string> {
+ static constexpr const char* type_name = "string";
+ static inline std::string parse(const char* value)
+ {
+ return std::string(value);
+ }
+};
+template<> struct ConfigType<bool> {
+ static constexpr const char* type_name = "boolean";
+ static inline bool parse(const char* value)
+ {
+ return parseBool(value);
+ }
+};
+
+// **** Forward declarations ****
+
+class ConfigurationElement ;
+template<class T> class TypedConfigurationElement;
+
+// **** ConfigurationElement ****
+
+class ConfigurationElement {
+protected:
+ std::string key;
+ std::string desc;
+ bool isdefault = true;
+
+public:
+
+ /* Callback */
+ xbt_cfg_cb_t old_callback = nullptr;
+
+ ConfigurationElement(const char* key, const char* desc)
+ : key(key ? key : ""), desc(desc ? desc : "") {}
+ ConfigurationElement(const char* key, const char* desc, xbt_cfg_cb_t cb)
+ : key(key ? key : ""), desc(desc ? desc : ""), old_callback(cb) {}
+
+ virtual ~ConfigurationElement()=default;
+
+ virtual std::string getStringValue() = 0;
+ virtual void setStringValue(const char* value) = 0;
+ virtual const char* getTypeName() = 0;
+
+ template<class T>
+ T const& getValue() const
+ {
+ return dynamic_cast<const TypedConfigurationElement<T>&>(*this).getValue();
+ }
+ template<class T>
+ void setValue(T value)
+ {
+ dynamic_cast<TypedConfigurationElement<T>&>(*this).setValue(std::move(value));
+ }
+ template<class T>
+ void setDefaultValue(T value)
+ {
+ dynamic_cast<TypedConfigurationElement<T>&>(*this).setDefaultValue(std::move(value));
+ }
+ bool isDefault() const { return isdefault; }
+
+ std::string const& getDescription() const { return desc; }
+};
+
+// **** TypedConfigurationElement<T> ****
+
+// TODO, could we use boost::any with some Type* reference?
+template<class T>
+class TypedConfigurationElement : public ConfigurationElement {
+private:
+ T content;
+ std::function<void(T&)> callback;
+
+public:
+ TypedConfigurationElement(const char* key, const char* desc, T value = T())
+ : ConfigurationElement(key, desc), content(std::move(value))
+ {}
+ TypedConfigurationElement(const char* key, const char* desc, T value,
+ xbt_cfg_cb_t cb)
+ : ConfigurationElement(key, desc, cb), content(std::move(value))
+ {}
+ TypedConfigurationElement(const char* key, const char* desc, T value,
+ std::function<void(T&)> callback)
+ : ConfigurationElement(key, desc), content(std::move(value)),
+ callback(std::move(callback))
+ {}
+ ~TypedConfigurationElement()=default;
+
+ std::string getStringValue() override;
+ const char* getTypeName() override;
+ void setStringValue(const char* value) override;
+
+ void update()
+ {
+ if (old_callback)
+ this->old_callback(key.c_str());
+ if (this->callback)
+ this->callback(this->content);
+ }
+
+ T const& getValue() const { return content; }
+
+ void setValue(T value)
+ {
+ this->content = std::move(value);
+ this->update();
+ }
+
+ void setDefaultValue(T value)
+ {
+ if (this->isdefault) {
+ this->content = std::move(value);
+ this->update();
+ } else {
+ XBT_DEBUG("Do not override configuration variable '%s' with value '%s'"
+ " because it was already set.", key.c_str(), to_string(value).c_str());
+ }
+ }
+};
+
+template<class T>
+std::string TypedConfigurationElement<T>::getStringValue() // override
+{
+ return to_string(content);
+}
+
+template<class T>
+void TypedConfigurationElement<T>::setStringValue(const char* value) // override
+{
+ this->content = ConfigType<T>::parse(value);
+ this->isdefault = false;
+ this->update();
+}
+
+template<class T>
+const char* TypedConfigurationElement<T>::getTypeName() // override
+{
+ return ConfigType<T>::type_name;
+}
+
+} // end of anonymous namespace
+
+// **** Config ****
+
+class Config {
+private:
+ // name -> ConfigElement:
+ xbt_dict_t options;
+ // alias -> xbt_dict_elm_t from options:
+ xbt_dict_t aliases;
+
+public:
+ Config();
+ ~Config();
+
+ // No copy:
+ Config(Config const&) = delete;
+ Config& operator=(Config const&) = delete;
+
+ ConfigurationElement& operator[](const char* name);
+ template<class T>
+ TypedConfigurationElement<T>& getTyped(const char* name);
+ void alias(const char* realname, const char* aliasname);
+
+ template<class T, class... A>
+ simgrid::config::TypedConfigurationElement<T>*
+ registerOption(const char* name, A&&... a)
+ {
+ xbt_assert(xbt_dict_get_or_null(this->options, name) == nullptr,
+ "Refusing to register the config element '%s' twice.", name);
+ TypedConfigurationElement<T>* variable =
+ new TypedConfigurationElement<T>(name, std::forward<A>(a)...);
+ XBT_DEBUG("Register cfg elm %s (%s) of type %s @%p in set %p)",
+ name,
+ variable->getDescription().c_str(),
+ variable->getTypeName(), variable, this);
+ xbt_dict_set(this->options, name, variable, nullptr);
+ variable->update();
+ return variable;
+ }
+
+ // Debug:
+ void dump(const char *name, const char *indent);
+ void showAliases();
+ void help();
+
+protected:
+ xbt_dictelm_t getDictElement(const char* name);
+};
+
+/* Internal stuff used in cache to free a variable */
+static void xbt_cfgelm_free(void *data)
+{
+ if (data)
+ delete (simgrid::config::ConfigurationElement*) data;
+}
+
+Config::Config() :
+ options(xbt_dict_new_homogeneous(xbt_cfgelm_free)),
+ aliases(xbt_dict_new_homogeneous(nullptr))
+{}
+
+Config::~Config()
+{
+ XBT_DEBUG("Frees cfg set %p", this);
+ xbt_dict_free(&this->options);
+ xbt_dict_free(&this->aliases);
+}
+
+inline
+xbt_dictelm_t Config::getDictElement(const char* name)
{
- (*(std::function<void(const char*)>*) data)(name);
+ // We are interested in the options dictelm:
+ xbt_dictelm_t res = xbt_dict_get_elm_or_null(options, name);
+ if (res)
+ return res;
+ // The aliases dict stores pointers to the options dictelm:
+ res = (xbt_dictelm_t) xbt_dict_get_or_null(aliases, name);
+ if (res)
+ XBT_INFO("Option %s has been renamed to %s. Consider switching.", name, res->key);
+ return res;
}
-static void freeCallback(void* data)
+inline
+ConfigurationElement& Config::operator[](const char* name)
{
- delete (std::function<void(const char*)>*) data;
+ xbt_dictelm_t elm = getDictElement(name);
+ if (elm == nullptr)
+ throw simgrid::config::missing_key_error(std::string("Bad config key, ") + name);
+ return *(ConfigurationElement*)elm->content;
}
-void registerConfig(const char* name, const char* description,
- e_xbt_cfgelm_type_t type,
- std::function<void(const char*)> callback)
+void Config::alias(const char* realname, const char* aliasname)
{
- std::function<void(const char*)>* code
- = new std::function<void(const char*)>(std::move(callback));
- xbt_cfg_register_ext(name, description, type,
- callCallback, code, freeCallback);
+ xbt_assert(this->getDictElement(aliasname) == nullptr, "Alias '%s' already.", aliasname);
+ xbt_dictelm_t element = this->getDictElement(realname);
+ xbt_assert(element, "Cannot define an alias to the non-existing option '%s'.", realname);
+ xbt_dict_set(this->aliases, aliasname, element, nullptr);
}
+/** @brief Dump a config set for debuging purpose
+ *
+ * @param name The name to give to this config set
+ * @param indent what to write at the beginning of each line (right number of spaces)
+ */
+void Config::dump(const char *name, const char *indent)
+{
+ xbt_dict_t dict = this->options;
+ xbt_dict_cursor_t cursor = nullptr;
+ simgrid::config::ConfigurationElement* variable = nullptr;
+ char *key = nullptr;
+
+ if (name)
+ printf("%s>> Dumping of the config set '%s':\n", indent, name);
+
+ xbt_dict_foreach(dict, cursor, key, variable)
+ printf("%s %s: ()%s) %s", indent, key,
+ variable->getTypeName(),
+ variable->getStringValue().c_str());
+
+ if (name)
+ printf("%s<< End of the config set '%s'\n", indent, name);
+ fflush(stdout);
+
+ xbt_dict_cursor_free(&cursor);
}
-}
\ No newline at end of file
+
+/** @brief Displays the declared aliases and their description */
+void Config::showAliases()
+{
+ xbt_dict_cursor_t dict_cursor;
+ xbt_dictelm_t dictel;
+ char *name;
+ std::vector<char*> names;
+
+ xbt_dict_foreach(this->aliases, dict_cursor, name, dictel)
+ names.push_back(name);
+ std::sort(begin(names), end(names), [](char* a, char* b) { return strcmp(a, b) < 0; });
+
+ for (auto name : names)
+ printf(" %s: %s\n", name, (*this)[name].getDescription().c_str());
+}
+
+/** @brief Displays the declared options and their description */
+void Config::help()
+{
+ xbt_dict_cursor_t dict_cursor;
+ simgrid::config::ConfigurationElement* variable;
+ char *name;
+ std::vector<char*> names;
+
+ xbt_dict_foreach(this->options, dict_cursor, name, variable)
+ names.push_back(name);
+ std::sort(begin(names), end(names), [](char* a, char* b) { return strcmp(a, b) < 0; });
+
+ for (auto name : names) {
+ variable = (simgrid::config::ConfigurationElement*) xbt_dict_get(this->options, name);
+ printf(" %s: %s\n", name, variable->getDescription().c_str());
+ printf(" Type: %s; ", variable->getTypeName());
+ printf("Current value: %s\n", variable->getStringValue().c_str());
+ }
+}
+
+// ***** getConfig *****
+
+template<class T>
+XBT_PUBLIC(T const&) getConfig(const char* name)
+{
+ return (*simgrid_config)[name].getValue<T>();
+}
+
+template XBT_PUBLIC(int const&) getConfig<int>(const char* name);
+template XBT_PUBLIC(double const&) getConfig<double>(const char* name);
+template XBT_PUBLIC(bool const&) getConfig<bool>(const char* name);
+template XBT_PUBLIC(std::string const&) getConfig<std::string>(const char* name);
+
+// ***** alias *****
+
+void alias(const char* realname, const char* aliasname)
+{
+ simgrid_config->alias(realname, aliasname);
+}
+
+// ***** declareFlag *****
+
+template<class T>
+XBT_PUBLIC(void) declareFlag(const char* name, const char* description,
+ T value, std::function<void(const T&)> callback)
+{
+ if (simgrid_config == nullptr) {
+ simgrid_config = xbt_cfg_new();
+ atexit(sg_config_finalize);
+ }
+ simgrid_config->registerOption<T>(
+ name, description, std::move(value), std::move(callback));
+}
+
+template XBT_PUBLIC(void) declareFlag(const char* name,
+ const char* description, int value, std::function<void(int const &)> callback);
+template XBT_PUBLIC(void) declareFlag(const char* name,
+ const char* description, double value, std::function<void(double const &)> callback);
+template XBT_PUBLIC(void) declareFlag(const char* name,
+ const char* description, bool value, std::function<void(bool const &)> callback);
+template XBT_PUBLIC(void) declareFlag(const char* name,
+ const char* description, std::string value, std::function<void(std::string const &)> callback);
+
+}
+}
+
+// ***** C bindings *****
+
+xbt_cfg_t xbt_cfg_new() { return new simgrid::config::Config(); }
+void xbt_cfg_free(xbt_cfg_t * cfg) { delete *cfg; }
+
+void xbt_cfg_dump(const char *name, const char *indent, xbt_cfg_t cfg)
+{
+ cfg->dump(name, indent);
+}
+
+/*----[ Registering stuff ]-----------------------------------------------*/
+
+void xbt_cfg_register_double(const char *name, double default_value,
+ xbt_cfg_cb_t cb_set, const char *desc)
+{
+ if (simgrid_config == nullptr)
+ simgrid_config = xbt_cfg_new();
+ simgrid_config->registerOption<double>(name, desc, default_value, cb_set);
+}
+
+void xbt_cfg_register_int(const char *name, int default_value,xbt_cfg_cb_t cb_set, const char *desc)
+{
+ if (simgrid_config == nullptr) {
+ simgrid_config = xbt_cfg_new();
+ atexit(&sg_config_finalize);
+ }
+ simgrid_config->registerOption<int>(name, desc, default_value, cb_set);
+}
+
+void xbt_cfg_register_string(const char *name, const char *default_value, xbt_cfg_cb_t cb_set, const char *desc)
+{
+ if (simgrid_config == nullptr) {
+ simgrid_config = xbt_cfg_new();
+ atexit(sg_config_finalize);
+ }
+ simgrid_config->registerOption<std::string>(name, desc,
+ default_value ? default_value : "", cb_set);
+}
+
+void xbt_cfg_register_boolean(const char *name, const char*default_value,xbt_cfg_cb_t cb_set, const char *desc)
+{
+ if (simgrid_config == nullptr) {
+ simgrid_config = xbt_cfg_new();
+ atexit(sg_config_finalize);
+ }
+ simgrid_config->registerOption<bool>(name, desc, simgrid::config::parseBool(default_value), cb_set);
+}
+
+void xbt_cfg_register_alias(const char *realname, const char *aliasname)
+{
+ if (simgrid_config == nullptr) {
+ simgrid_config = xbt_cfg_new();
+ atexit(sg_config_finalize);
+ }
+ simgrid_config->alias(realname, aliasname);
+}
+
+void xbt_cfg_aliases() { simgrid_config->showAliases(); }
+void xbt_cfg_help() { simgrid_config->help(); }
+
+/*----[ Setting ]---------------------------------------------------------*/
+
+/** @brief Add values parsed from a string into a config set
+ *
+ * @param options a string containing the content to add to the config set. This is a '\\t',' ' or '\\n' or ','
+ * separated list of variables. Each individual variable is like "[name]:[value]" where [name] is the name of an
+ * already registered variable, and [value] conforms to the data type under which this variable was registered.
+ *
+ * @todo This is a crude manual parser, it should be a proper lexer.
+ */
+void xbt_cfg_set_parse(const char *options)
+{
+ if (not options || not strlen(options)) { /* nothing to do */
+ return;
+ }
+ char *optionlist_cpy = xbt_strdup(options);
+
+ XBT_DEBUG("List to parse and set:'%s'", options);
+ char *option = optionlist_cpy;
+ while (1) { /* breaks in the code */
+ if (not option)
+ break;
+ char *name = option;
+ int len = strlen(name);
+ XBT_DEBUG("Still to parse and set: '%s'. len=%d; option-name=%ld", name, len, (long) (option - name));
+
+ /* Pass the value */
+ while (option - name <= (len - 1) && *option != ' ' && *option != '\n' && *option != '\t' && *option != ',') {
+ XBT_DEBUG("Take %c.", *option);
+ option++;
+ }
+ if (option - name == len) {
+ XBT_DEBUG("Boundary=EOL");
+ option = nullptr; /* don't do next iteration */
+ } else {
+ XBT_DEBUG("Boundary on '%c'. len=%d;option-name=%ld", *option, len, (long) (option - name));
+ /* Pass the following blank chars */
+ *(option++) = '\0';
+ while (option - name < (len - 1) && (*option == ' ' || *option == '\n' || *option == '\t')) {
+ /* fprintf(stderr,"Ignore a blank char.\n"); */
+ option++;
+ }
+ if (option - name == len - 1)
+ option = nullptr; /* don't do next iteration */
+ }
+ XBT_DEBUG("parse now:'%s'; parse later:'%s'", name, option);
+
+ if (name[0] == ' ' || name[0] == '\n' || name[0] == '\t')
+ continue;
+ if (not strlen(name))
+ break;
+
+ char *val = strchr(name, ':');
+ xbt_assert(val, "Option '%s' badly formatted. Should be of the form 'name:value'", name);
+ /* don't free(optionlist_cpy) if the assert fails, 'name' points inside it */
+ *(val++) = '\0';
+
+ if (strncmp(name, "path", strlen("path")))
+ XBT_INFO("Configuration change: Set '%s' to '%s'", name, val);
+
+ try {
+ (*simgrid_config)[name].setStringValue(val);
+ }
+ catch (simgrid::config::missing_key_error& e) {
+ goto on_missing_key;
+ }
+ catch (...) {
+ goto on_exception;
+ }
+ }
+
+ free(optionlist_cpy);
+ return;
+
+ /* Do not THROWF from a C++ exception catching context, or some cleanups will be missing */
+on_missing_key:
+ free(optionlist_cpy);
+ THROWF(not_found_error, 0, "Could not set variables %s", options);
+ return;
+on_exception:
+ free(optionlist_cpy);
+ THROWF(unknown_error, 0, "Could not set variables %s", options);
+}
+
+// Horrible mess to translate C++ exceptions to C exceptions:
+// Exit from the catch blog (and do the correct exceptio cleaning)
+// before attempting to THROWF.
+#define TRANSLATE_EXCEPTIONS(...) \
+ catch(simgrid::config::missing_key_error& e) { THROWF(not_found_error, 0, __VA_ARGS__); abort(); } \
+ catch(...) { THROWF(not_found_error, 0, __VA_ARGS__); abort(); }
+
+/** @brief Set the value of a variable, using the string representation of that value
+ *
+ * @param key name of the variable to modify
+ * @param value string representation of the value to set
+ */
+
+void xbt_cfg_set_as_string(const char *key, const char *value)
+{
+ try {
+ (*simgrid_config)[key].setStringValue(value);
+ return;
+ }
+ TRANSLATE_EXCEPTIONS("Could not set variable %s as string %s", key, value);
+}
+
+/** @brief Set an integer value to \a name within \a cfg if it wasn't changed yet
+ *
+ * This is useful to change the default value of a variable while allowing
+ * users to override it with command line arguments
+ */
+void xbt_cfg_setdefault_int(const char *key, int value)
+{
+ try {
+ (*simgrid_config)[key].setDefaultValue<int>(value);
+ return;
+ }
+ TRANSLATE_EXCEPTIONS("Could not set variable %s to default integer %i",
+ key, value);
+}
+
+/** @brief Set an integer value to \a name within \a cfg if it wasn't changed yet
+ *
+ * This is useful to change the default value of a variable while allowing
+ * users to override it with command line arguments
+ */
+void xbt_cfg_setdefault_double(const char *key, double value)
+{
+ try {
+ (*simgrid_config)[key].setDefaultValue<double>(value);
+ return;
+ }
+ TRANSLATE_EXCEPTIONS("Could not set variable %s to default double %f",
+ key, value);
+}
+
+/** @brief Set a string value to \a name within \a cfg if it wasn't changed yet
+ *
+ * This is useful to change the default value of a variable while allowing
+ * users to override it with command line arguments
+ */
+void xbt_cfg_setdefault_string(const char *key, const char *value)
+{
+ try {
+ (*simgrid_config)[key].setDefaultValue<std::string>(value ? value : "");
+ return;
+ }
+ TRANSLATE_EXCEPTIONS("Could not set variable %s to default string %s",
+ key, value);
+}
+
+/** @brief Set an boolean value to \a name within \a cfg if it wasn't changed yet
+ *
+ * This is useful to change the default value of a variable while allowing
+ * users to override it with command line arguments
+ */
+void xbt_cfg_setdefault_boolean(const char *key, const char *value)
+{
+ try {
+ (*simgrid_config)[key].setDefaultValue<bool>(simgrid::config::parseBool(value));
+ return;
+ }
+ TRANSLATE_EXCEPTIONS("Could not set variable %s to default boolean %s",
+ key, value);
+}
+
+/** @brief Set an integer value to \a name within \a cfg
+ *
+ * @param key the name of the variable
+ * @param value the value of the variable
+ */
+void xbt_cfg_set_int(const char *key, int value)
+{
+ try {
+ (*simgrid_config)[key].setValue<int>(value);
+ return;
+ }
+ TRANSLATE_EXCEPTIONS("Could not set variable %s to integer %i",
+ key, value);
+}
+
+/** @brief Set or add a double value to \a name within \a cfg
+ *
+ * @param key the name of the variable
+ * @param value the double to set
+ */
+void xbt_cfg_set_double(const char *key, double value)
+{
+ try {
+ (*simgrid_config)[key].setValue<double>(value);
+ return;
+ }
+ TRANSLATE_EXCEPTIONS("Could not set variable %s to double %f",
+ key, value);
+}
+
+/** @brief Set or add a string value to \a name within \a cfg
+ *
+ * @param key the name of the variable
+ * @param value the value to be added
+ *
+ */
+void xbt_cfg_set_string(const char *key, const char *value)
+{
+ try {
+ (*simgrid_config)[key].setValue<std::string>(value ? value : "");
+ return;
+ }
+ TRANSLATE_EXCEPTIONS("Could not set variable %s to string %s",
+ key, value);
+}
+
+/** @brief Set or add a boolean value to \a name within \a cfg
+ *
+ * @param key the name of the variable
+ * @param value the value of the variable
+ */
+void xbt_cfg_set_boolean(const char *key, const char *value)
+{
+ try {
+ (*simgrid_config)[key].setValue<bool>(simgrid::config::parseBool(value));
+ return;
+ }
+ TRANSLATE_EXCEPTIONS("Could not set variable %s to boolean %s",
+ key, value);
+}
+
+
+/* Say if the value is the default value */
+int xbt_cfg_is_default_value(const char *key)
+{
+ try {
+ return (*simgrid_config)[key].isDefault() ? 1 : 0;
+ }
+ TRANSLATE_EXCEPTIONS("Could not get variable %s", key);
+}
+
+/*----[ Getting ]---------------------------------------------------------*/
+/** @brief Retrieve an integer value of a variable (get a warning if not uniq)
+ *
+ * @param key the name of the variable
+ *
+ * Returns the first value from the config set under the given name.
+ */
+int xbt_cfg_get_int(const char *key)
+{
+ try {
+ return (*simgrid_config)[key].getValue<int>();
+ }
+ TRANSLATE_EXCEPTIONS("Could not get variable %s", key);
+}
+
+/** @brief Retrieve a double value of a variable (get a warning if not uniq)
+ *
+ * @param key the name of the variable
+ *
+ * Returns the first value from the config set under the given name.
+ */
+double xbt_cfg_get_double(const char *key)
+{
+ try {
+ return (*simgrid_config)[key].getValue<double>();
+ }
+ TRANSLATE_EXCEPTIONS("Could not get variable %s", key);
+}
+
+/** @brief Retrieve a string value of a variable (get a warning if not uniq)
+ *
+ * @param key the name of the variable
+ *
+ * Returns the first value from the config set under the given name.
+ * If there is more than one value, it will issue a warning.
+ * Returns nullptr if there is no value.
+ *
+ * \warning the returned value is the actual content of the config set
+ */
+char *xbt_cfg_get_string(const char *key)
+{
+ try {
+ return (char*) (*simgrid_config)[key].getValue<std::string>().c_str();
+ }
+ TRANSLATE_EXCEPTIONS("Could not get variable %s", key);
+}
+
+/** @brief Retrieve a boolean value of a variable (get a warning if not uniq)
+ *
+ * @param key the name of the variable
+ *
+ * Returns the first value from the config set under the given name.
+ * If there is more than one value, it will issue a warning.
+ */
+int xbt_cfg_get_boolean(const char *key)
+{
+ try {
+ return (*simgrid_config)[key].getValue<bool>() ? 1 : 0;
+ }
+ TRANSLATE_EXCEPTIONS("Could not get variable %s", key);
+}
+
+#ifdef SIMGRID_TEST
+
+#include <string>
+
+#include "xbt.h"
+#include "xbt/ex.h"
+#include <xbt/ex.hpp>
+
+#include <xbt/config.hpp>
+
+XBT_LOG_EXTERNAL_DEFAULT_CATEGORY(xbt_cfg);
+
+XBT_TEST_SUITE("config", "Configuration support");
+
+XBT_PUBLIC_DATA(xbt_cfg_t) simgrid_config;
+
+static void make_set()
+{
+ simgrid_config = nullptr;
+ xbt_log_threshold_set(&_XBT_LOGV(xbt_cfg), xbt_log_priority_critical);
+ xbt_cfg_register_int("speed", 0, nullptr, "");
+ xbt_cfg_register_string("peername", "", nullptr, "");
+ xbt_cfg_register_string("user", "", nullptr, "");
+} /* end_of_make_set */
+
+XBT_TEST_UNIT("memuse", test_config_memuse, "Alloc and free a config set")
+{
+ auto temp = simgrid_config;
+ make_set();
+ xbt_test_add("Alloc and free a config set");
+ xbt_cfg_set_parse("peername:veloce user:bidule");
+ xbt_cfg_free(&simgrid_config);
+ simgrid_config = temp;
+}
+
+XBT_TEST_UNIT("use", test_config_use, "Data retrieving tests")
+{
+ auto temp = simgrid_config;
+ make_set();
+ xbt_test_add("Get a single value");
+ {
+ /* get_single_value */
+ int ival;
+
+ xbt_cfg_set_parse("peername:toto:42 speed:42");
+ ival = xbt_cfg_get_int("speed");
+ if (ival != 42)
+ xbt_test_fail("Speed value = %d, I expected 42", ival);
+ }
+
+ xbt_test_add("Access to a non-existant entry");
+ {
+ try {
+ xbt_cfg_set_parse("color:blue");
+ } catch(xbt_ex& e) {
+ if (e.category != not_found_error)
+ xbt_test_exception(e);
+ }
+ }
+ xbt_cfg_free(&simgrid_config);
+ simgrid_config = temp;
+}
+
+XBT_TEST_UNIT("c++flags", test_config_cxx_flags, "C++ flags")
+{
+ auto temp = simgrid_config;
+ make_set();
+ xbt_test_add("C++ declaration of flags");
+
+ simgrid::config::Flag<int> int_flag("int", "", 0);
+ simgrid::config::Flag<std::string> string_flag("string", "", "foo");
+ simgrid::config::Flag<double> double_flag("double", "", 0.32);
+ simgrid::config::Flag<bool> bool_flag1("bool1", "", false);
+ simgrid::config::Flag<bool> bool_flag2("bool2", "", true);
+
+ xbt_test_add("Parse values");
+ xbt_cfg_set_parse("int:42 string:bar double:8.0 bool1:true bool2:false");
+ xbt_test_assert(int_flag == 42, "Check int flag");
+ xbt_test_assert(string_flag == "bar", "Check string flag");
+ xbt_test_assert(double_flag == 8.0, "Check double flag");
+ xbt_test_assert(bool_flag1, "Check bool1 flag");
+ xbt_test_assert(not bool_flag2, "Check bool2 flag");
+
+ xbt_cfg_free(&simgrid_config);
+ simgrid_config = temp;
+}
+
+#endif /* SIMGRID_TEST */
