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+/* $Id: CoinFileIO.hpp 1439 2011-06-13 16:31:21Z stefan $ */
+// Copyright (C) 2005, COIN-OR. All Rights Reserved.
+// This code is licensed under the terms of the Eclipse Public License (EPL).
+
+#ifndef CoinFileIO_H
+#define CoinFileIO_H
+
+#include <string>
+
+/// Base class for FileIO classes.
+class CoinFileIOBase
+{
+public:
+ /// Constructor.
+ /// @param fileName The name of the file used by this object.
+ CoinFileIOBase (const std::string &fileName);
+
+ /// Destructor.
+ ~CoinFileIOBase ();
+
+ /// Return the name of the file used by this object.
+ const char *getFileName () const;
+
+ /// Return the method of reading being used
+ inline std::string getReadType () const
+ { return readType_.c_str();}
+protected:
+ std::string readType_;
+private:
+ CoinFileIOBase ();
+ CoinFileIOBase (const CoinFileIOBase &);
+
+ std::string fileName_;
+};
+
+/// Abstract base class for file input classes.
+class CoinFileInput: public CoinFileIOBase
+{
+public:
+ /// indicates whether CoinFileInput supports gzip'ed files
+ static bool haveGzipSupport();
+ /// indicates whether CoinFileInput supports bzip2'ed files
+ static bool haveBzip2Support();
+
+ /// Factory method, that creates a CoinFileInput (more precisely
+ /// a subclass of it) for the file specified. This method reads the
+ /// first few bytes of the file and determines if this is a compressed
+ /// or a plain file and returns the correct subclass to handle it.
+ /// If the file does not exist or uses a compression not compiled in
+ /// an exception is thrown.
+ /// @param fileName The file that should be read.
+ static CoinFileInput *create (const std::string &fileName);
+
+ /// Constructor (don't use this, use the create method instead).
+ /// @param fileName The name of the file used by this object.
+ CoinFileInput (const std::string &fileName);
+
+ /// Destructor.
+ virtual ~CoinFileInput ();
+
+ /// Read a block of data from the file, similar to fread.
+ /// @param buffer Address of a buffer to store the data into.
+ /// @param size Number of bytes to read (buffer should be large enough).
+ /// @return Number of bytes read.
+ virtual int read (void *buffer, int size) = 0;
+
+ /// Reads up to (size-1) characters an stores them into the buffer,
+ /// similar to fgets.
+ /// Reading ends, when EOF or a newline occurs or (size-1) characters have
+ /// been read. The resulting string is terminated with '\0'. If reading
+ /// ends due to an encoutered newline, the '\n' is put into the buffer,
+ /// before the '\0' is appended.
+ /// @param buffer The buffer to put the string into.
+ /// @param size The size of the buffer in characters.
+ /// @return buffer on success, or 0 if no characters have been read.
+ virtual char *gets (char *buffer, int size) = 0;
+};
+
+/// Abstract base class for file output classes.
+class CoinFileOutput: public CoinFileIOBase
+{
+public:
+
+ /// The compression method.
+ enum Compression {
+ COMPRESS_NONE = 0, ///< No compression.
+ COMPRESS_GZIP = 1, ///< gzip compression.
+ COMPRESS_BZIP2 = 2 ///< bzip2 compression.
+ };
+
+ /// Returns whether the specified compression method is supported
+ /// (i.e. was compiled into COIN).
+ static bool compressionSupported (Compression compression);
+
+ /// Factory method, that creates a CoinFileOutput (more precisely
+ /// a subclass of it) for the file specified. If the compression method
+ /// is not supported an exception is thrown (so use compressionSupported
+ /// first, if this is a problem). The reason for not providing direct
+ /// access to the subclasses (and using such a method instead) is that
+ /// depending on the build configuration some of the classes are not
+ /// available (or functional). This way we can handle all required ifdefs
+ /// here instead of polluting other files.
+ /// @param fileName The file that should be read.
+ /// @param compression Compression method used.
+ static CoinFileOutput *create (const std::string &fileName,
+ Compression compression);
+
+ /// Constructor (don't use this, use the create method instead).
+ /// @param fileName The name of the file used by this object.
+ CoinFileOutput (const std::string &fileName);
+
+ /// Destructor.
+ virtual ~CoinFileOutput ();
+
+ /// Write a block of data to the file, similar to fwrite.
+ /// @param buffer Address of a buffer containing the data to be written.
+ /// @param size Number of bytes to write.
+ /// @return Number of bytes written.
+ virtual int write (const void * buffer, int size) = 0;
+
+ /// Write a string to the file (like fputs).
+ /// Just as with fputs no trailing newline is inserted!
+ /// The terminating '\0' is not written to the file.
+ /// The default implementation determines the length of the string
+ /// and calls write on it.
+ /// @param s The zero terminated string to be written.
+ /// @return true on success, false on error.
+ virtual bool puts (const char *s);
+
+ /// Convenience method: just a 'puts(s.c_str())'.
+ inline bool puts (const std::string &s)
+ {
+ return puts (s.c_str ());
+ }
+};
+
+/*! \relates CoinFileInput
+ \brief Test if the given string looks like an absolute file path
+
+ The criteria are:
+ - unix: string begins with `/'
+ - windows: string begins with `\' or with `drv:' (drive specifier)
+*/
+bool fileAbsPath (const std::string &path) ;
+
+/*! \relates CoinFileInput
+ \brief Test if the file is readable, using likely versions of the file
+ name, and return the name that worked.
+
+ The file name is constructed from \p name using the following rules:
+ <ul>
+ <li> An absolute path is not modified.
+ <li> If the name begins with `~', an attempt is made to replace `~'
+ with the value of the environment variable HOME.
+ <li> If a default prefix (\p dfltPrefix) is provided, it is
+ prepended to the name.
+ </ul>
+ If the constructed file name cannot be opened, and CoinUtils was built
+ with support for compressed files, fileCoinReadable will try any
+ standard extensions for supported compressed files.
+
+ The value returned in \p name is the file name that actually worked.
+*/
+bool fileCoinReadable(std::string &name,
+ const std::string &dfltPrefix = std::string(""));
+#endif