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35 /*! \libinternal \file
37 * Declares gmx::FileOutputRedirectorInterface.
39 * \author Teemu Murtola <teemu.murtola@gmail.com>
41 * \ingroup module_utility
43 #ifndef GMX_UTILITY_FILEREDIRECTOR_H
44 #define GMX_UTILITY_FILEREDIRECTOR_H
48 #include "gromacs/utility/file.h"
53 /*! \libinternal \brief
54 * Allows overriding file existence checks from code that supports it.
56 * The calling code should take in this interface and use the methods in it
57 * all file system operations that need to support this redirection.
58 * By default, the code can then use defaultFileInputRedirector() in case no
59 * redirection is needed.
61 * This allows tests to override the file existence checks without actually
62 * using the file system.
64 * With some further refactoring of the File class, this could also support
65 * redirecting input files from in-memory buffers as well, but for now the
66 * current capabilities are sufficient.
69 * \ingroup module_utility
71 class FileInputRedirectorInterface
74 virtual ~FileInputRedirectorInterface();
77 * Checks whether the provided path exists (and is a file).
79 virtual bool fileExists(const char *filename) const = 0;
81 //! Convenience method to check file existence using an std::string path.
82 bool fileExists(const std::string &filename) const
84 return fileExists(filename.c_str());
88 /*! \libinternal \brief
89 * Allows capturing `stdout` and file output from code that supports it.
91 * The calling code should take in this interface and use the File objects
92 * it returns for all output that needs to support this redirection.
93 * By default, the code can then use defaultFileOutputRedirector() in case no
94 * redirection is needed.
96 * This allows tests to capture the file output without duplicating the
97 * knowledge of which files are actually produced. With some further
98 * refactoring of the File class, this could support capturing the output into
99 * in-memory buffers as well, but for now the current capabilities are
103 * \ingroup module_utility
105 class FileOutputRedirectorInterface
108 virtual ~FileOutputRedirectorInterface();
111 * Returns a File object to use for `stdout` output.
113 virtual File &standardOutput() = 0;
115 * Returns a File object to use for output to a given file.
117 * \param[in] filename Requested file name.
119 virtual FileInitializer openFileForWriting(const char *filename) = 0;
121 //! Convenience method to open a file using an std::string path.
122 FileInitializer openFileForWriting(const std::string &filename)
124 return openFileForWriting(filename.c_str());
130 * Returns default implementation for FileInputRedirectorInterface.
132 * The returned implementation does not redirect anything, but just uses the
133 * file system normally.
137 * \ingroup module_utility
139 FileInputRedirectorInterface &defaultFileInputRedirector();
141 * Returns default implementation for FileOutputRedirectorInterface.
143 * The returned implementation does not redirect anything, but just opens the
144 * files at requested locations.
148 * \ingroup module_utility
150 FileOutputRedirectorInterface &defaultFileOutputRedirector();