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project_path.hpp
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project_path.hpp
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/***************************************************************************//**
*
* \file rosa/config/project_path.hpp
*
* \author David Juhasz (david.juhasz@tuwien.ac.at)
*
* \date 2017
*
* \brief Facility for compile-time manipulation of paths.
*
******************************************************************************/
#ifndef ROSA_CONFIG_PROJECT_PATH_HPP
#define ROSA_CONFIG_PROJECT_PATH_HPP
#include "rosa/config/rosa_config.h"
#include <cstdlib>
namespace rosa {
/// Nested namespace with implementation of the provided features,
/// consider it private.
namespace {
/// Tells the index of the project-relative part of an absolute path.
///
/// \param path absolute path to check
/// \param project the absolute path of the project
/// \param index number of leading characters already checked and found
/// matching
///
/// \return index of the `project`-relative part of `path`; `0` if `path` is not
/// under `project`
constexpr size_t
project_relative_path_index_impl(const char *const path,
const char *const project = ROSA_SRC_DIR,
const size_t index = 0) {
return project[index] == '\0'
? index // Found it.
: (path[index] == '\0' || project[index] != path[index])
? 0 // Path is not under project.
: project_relative_path_index_impl(
path, project,
index + 1); // Continue searching...
}
} // End namespace
/// Tells the index of the project-relative part of an absolute path.
///
/// \param path absolute path to check
///
/// \return index of the project-relative part of `path`; `0` if `path` is not
/// under the RoSA siource directory.
constexpr size_t project_relative_path_index(const char * const path) {
return project_relative_path_index_impl(path);
}
} // End namespace rosa
#endif // ROSA_CONFIG_PROJECT_PATH_HPP

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