Output: Add hierarchical output support and cleanup existing codebase.

--HG--
extra : rebase_source : 3301137733cdf5fdb471d56ef7990e7a3a865442

1 files changed, 118 insertions, 3 deletions

diff --git a/src/base/output.hh b/src/base/output.hh
index 38c63714c..b86e68856 100644
--- a/src/base/output.hh
+++ b/src/base/output.hh
@@ -26,6 +26,7 @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  *
  * Authors: Nathan Binkert
+ *          Chris Emmons
  */
 
 #ifndef __BASE_OUTPUT_HH__
@@ -35,33 +36,147 @@
 #include <map>
 #include <string>
 
+/** Interface for creating files in a gem5 output directory. */
 class OutputDirectory
 {
   private:
+    /** File names and associated stream handles */
     typedef std::map<std::string, std::ostream *> map_t;
 
+    /** Open file streams within this directory */
     map_t files;
+
+    /** Name of this directory */
     std::string dir;
 
+    /** System-specific path separator character */
+    static const char PATH_SEPARATOR = '/';
+
+    /**
+     * Returns relative file names prepended with name of this directory.
+     * Returns absolute file names unaltered.
+     *
+     * @param name file name to prepend with directory name
+     * @return file name prepended with base directory name or unaltered
+     *          absolute file name
+     */
     std::string resolve(const std::string &name) const;
 
   protected:
+    /**
+     * Determines whether given file name corresponds to standard output
+     * streams.
+     *
+     * @param name name of file to check
+     * @return output stream for standard output or error stream if name
+     *         corresponds to one or the other; NULL otherwise
+     */
     std::ostream *checkForStdio(const std::string &name) const;
+
+    /** Opens a file (optionally compressed).
+     *
+     * Will open a file as a compressed stream if filename ends in .gz.
+     *
+     * @param filename file to open
+     * @param mode attributes to open file with
+     * @return stream pointer to opened file; will cause sim fail on error
+     */
     std::ostream *openFile(const std::string &filename,
-                        std::ios_base::openmode mode = std::ios::trunc) const;
+                        std::ios_base::openmode mode = std::ios::trunc);
 
   public:
+    /** Constructor. */
     OutputDirectory();
+
+    /** Destructor. */
     ~OutputDirectory();
 
+    /**
+     * Sets name of this directory.
+     * @param dir name of this directory
+     */
     void setDirectory(const std::string &dir);
+
+    /**
+     * Gets name of this directory.
+     * @return name of this directory
+     */
     const std::string &directory() const;
 
+    /**
+     * Creates a file in this directory (optionally compressed).
+     *
+     * Will open a file as a compressed stream if filename ends in .gz.
+     *
+     * @param name name of file to create (without this directory's name
+     *          leading it)
+     * @param binary true to create a binary file; false otherwise
+     * @return stream to the opened file
+     */
     std::ostream *create(const std::string &name, bool binary = false);
-    std::ostream *find(const std::string &name);
 
+    /**
+     * Closes a file stream.
+     *
+     * Stream must have been opened through this interface, or sim will fail.
+     *
+     * @param openStream open stream to close
+     */
+    void close(std::ostream *openStream);
+
+    /**
+     * Finds stream associated with a file.
+     * @param name of file
+     * @return stream to specified file or NULL if file does not exist
+     */
+    std::ostream *find(const std::string &name) const;
+
+    /**
+     * Returns true if stream is open and not standard output or error.
+     * @param os output stream to evaluate
+     * @return true if os is non-NULL and not cout or cerr
+     */
     static bool isFile(const std::ostream *os);
-    static inline bool isFile(const std::ostream &os) { return isFile(&os); }
+
+    /**
+     * Determines whether a file name corresponds to a file in this directory.
+     * @param name name of file to evaluate
+     * @return true iff file has been opened in this directory or exists on the
+     *          file system within this directory
+     */
+    bool isFile(const std::string &name) const;
+
+    /**
+     * Returns true if stream is open and not standard output or error.
+     * @param os output stream to evaluate
+     * @return true if os is non-NULL and not cout or cerr
+     */
+    static inline bool isFile(const std::ostream &os) {
+        return isFile(&os);
+    }
+
+    /**
+     * Creates a subdirectory within this directory.
+     * @param name name of subdirectory
+     * @return the new subdirectory's name suffixed with a path separator
+     */
+    std::string createSubdirectory(const std::string &name) const;
+
+    /**
+     * Removes a specified file or subdirectory.
+     *
+     * Will cause sim to fail for most errors.  However, it will only warn the
+     * user if a directory could not be removed.  This is in place to
+     * accommodate slow file systems where file deletions within a subdirectory
+     * may not be recognized quickly enough thereby causing the subsequent call
+     * to remove the directory to fail (seemingly unempty directory).
+     *
+     * @param name name of file or subdirectory to remove; name should not
+     *              be prepended with the name of this directory object
+     * @param recursive set to true to attempt to recursively delete a
+     *                  subdirectory and its contents
+     */
+    void remove(const std::string &name, bool recursive=false);
 };
 
 extern OutputDirectory simout;