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https://git.rwth-aachen.de/acs/public/villas/node/
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93 lines
2.5 KiB
C++
93 lines
2.5 KiB
C++
/** Configuration file parsing.
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*
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* @file
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* @author Steffen Vogel <stvogel@eonerc.rwth-aachen.de>
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* @copyright 2014-2020, Institute for Automation of Complex Power Systems, EONERC
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* @license GNU General Public License (version 3)
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*
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* VILLASnode
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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, either version 3 of the License, or
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* any later version.
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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 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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#pragma once
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#include <cstdio>
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#include <unistd.h>
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#include <functional>
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#include <regex>
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#include <filesystem>
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#include <jansson.h>
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#include <villas/node/config.h>
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#include <villas/log.hpp>
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namespace villas {
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namespace node {
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class Config {
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protected:
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using str_walk_fcn_t = std::function<json_t *(json_t *)>;
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Logger logger;
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/** Check if file exists on local system. */
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static bool isLocalFile(const std::string &uri)
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{
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return access(uri.c_str(), F_OK) != -1;
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}
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/** Decode configuration file. */
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json_t * decode(FILE *f);
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#ifdef WITH_CONFIG
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/** Convert libconfig .conf file to libjansson .json file. */
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json_t * libconfigDecode(FILE *f);
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#endif /* WITH_CONFIG */
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/** Load configuration from standard input (stdim). */
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FILE * loadFromStdio();
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/** Load configuration from local file. */
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FILE * loadFromLocalFile(const std::string &u);
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/** Resolve custom include directives. */
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json_t * resolveIncludes(json_t *in);
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/** To shell-like subsitution of environment variables in strings. */
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json_t * expandEnvVars(json_t *in);
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/** Run a callback function for each string in the config */
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json_t * walkStrings(json_t *in, str_walk_fcn_t cb);
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/** Get the include dirs */
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std::list<std::filesystem::path> getIncludeDirs(FILE *f) const;
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public:
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json_t *root;
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Config();
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Config(const std::string &u);
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~Config();
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json_t * load(std::FILE *f, bool resolveIncludes = true, bool resolveEnvVars = true);
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json_t * load(const std::string &u, bool resolveIncludes = true, bool resolveEnvVars = true);
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};
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} /* namespace node */
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} /* namespace villas */
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