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Diffstat (limited to 'lldb/include/lldb/Core/FileSpec.h')
| -rw-r--r-- | lldb/include/lldb/Core/FileSpec.h | 440 |
1 files changed, 440 insertions, 0 deletions
diff --git a/lldb/include/lldb/Core/FileSpec.h b/lldb/include/lldb/Core/FileSpec.h new file mode 100644 index 00000000000..4aa17826c2b --- /dev/null +++ b/lldb/include/lldb/Core/FileSpec.h @@ -0,0 +1,440 @@ +//===-- FileSpec.h ----------------------------------------------*- C++ -*-===// +// +// The LLVM Compiler Infrastructure +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// + +#ifndef liblldb_FileSpec_h_ +#define liblldb_FileSpec_h_ +#if defined(__cplusplus) + +#include "lldb/lldb-private.h" +#include "lldb/Core/ConstString.h" +#include "lldb/Core/STLUtils.h" +#include "lldb/Host/TimeValue.h" + +namespace lldb_private { + +//---------------------------------------------------------------------- +/// @class FileSpec FileSpec.h "lldb/Core/FileSpec.h" +/// @brief A file utility class. +/// +/// A file specification class that divides paths up into a directory +/// and filename. These string values of the paths are put into uniqued +/// string pools for fast comparisons and efficient memory usage. +//---------------------------------------------------------------------- +class FileSpec +{ +public: + typedef enum FileType + { + eFileTypeInvalid = -1, + eFileTypeUknown = 0, + eFileTypeDirectory, + eFileTypePipe, + eFileTypeRegular, + eFileTypeSocket, + eFileTypeSymbolicLink, + }; + + FileSpec(); + + //------------------------------------------------------------------ + /// Default constructor. + /// + /// Takes an optional full path to a file. If \a path is valid, + /// this function will call FileSpec::SetFile (\a path). + /// + /// @param[in] path + /// The full or partial path to a file. + /// + /// @see FileSpec::SetFile () + //------------------------------------------------------------------ + explicit FileSpec (const char *path); + + //------------------------------------------------------------------ + /// Copy constructor + /// + /// Makes a copy of the uniqued directory and filename strings from + /// \a rhs. + /// + /// @param[in] rhs + /// A const FileSpec object reference to copy. + //------------------------------------------------------------------ + FileSpec (const FileSpec& rhs); + + //------------------------------------------------------------------ + /// Copy constructor + /// + /// Makes a copy of the uniqued directory and filename strings from + /// \a rhs if it is not NULL. + /// + /// @param[in] rhs + /// A const FileSpec object pointer to copy if non-NULL. + //------------------------------------------------------------------ + FileSpec (const FileSpec* rhs); + + //------------------------------------------------------------------ + /// Destructor. + /// + /// The destructor is virtual in case this class is subclassed. + //------------------------------------------------------------------ + virtual + ~FileSpec (); + + //------------------------------------------------------------------ + /// Assignment operator. + /// + /// Makes a copy of the uniqued directory and filename strings from + /// \a rhs. + /// + /// @param[in] rhs + /// A const FileSpec object reference to assign to this object. + /// + /// @return + /// A const reference to this object. + //------------------------------------------------------------------ + const FileSpec& + operator= (const FileSpec& rhs); + + //------------------------------------------------------------------ + /// Equal to operator + /// + /// Tests if this object is equal to \a rhs. + /// + /// @param[in] rhs + /// A const FileSpec object reference to compare this object + /// to. + /// + /// @return + /// \b true if this object is equal to \a rhs, \b false + /// otherwise. + //------------------------------------------------------------------ + bool + operator== (const FileSpec& rhs) const; + + //------------------------------------------------------------------ + /// Not equal to operator + /// + /// Tests if this object is not equal to \a rhs. + /// + /// @param[in] rhs + /// A const FileSpec object reference to compare this object + /// to. + /// + /// @return + /// \b true if this object is equal to \a rhs, \b false + /// otherwise. + //------------------------------------------------------------------ + bool + operator!= (const FileSpec& rhs) const; + + //------------------------------------------------------------------ + /// Less than to operator + /// + /// Tests if this object is less than \a rhs. + /// + /// @param[in] rhs + /// A const FileSpec object reference to compare this object + /// to. + /// + /// @return + /// \b true if this object is less than \a rhs, \b false + /// otherwise. + //------------------------------------------------------------------ + bool + operator< (const FileSpec& rhs) const; + + //------------------------------------------------------------------ + /// Convert to pointer operator. + /// + /// This allows code to check a FileSpec object to see if it + /// contains anything valid using code such as: + /// + /// @code + /// FileSpec file_spec(...); + /// if (file_spec) + /// { ... + /// @endcode + /// + /// @return + /// A pointer to this object if either the directory or filename + /// is valid, NULL otherwise. + //------------------------------------------------------------------ + operator + void* () const; + + //------------------------------------------------------------------ + /// Logical NOT operator. + /// + /// This allows code to check a FileSpec object to see if it is + /// invalid using code such as: + /// + /// @code + /// FileSpec file_spec(...); + /// if (!file_spec) + /// { ... + /// @endcode + /// + /// @return + /// Returns \b true if the object has an empty directory and + /// filename, \b false otherwise. + //------------------------------------------------------------------ + bool + operator! () const; + + //------------------------------------------------------------------ + /// Clears the object state. + /// + /// Clear this object by releasing both the directory and filename + /// string values and reverting them to empty strings. + //------------------------------------------------------------------ + void + Clear (); + + //------------------------------------------------------------------ + /// Compare two FileSpec objects. + /// + /// If \a full is true, then both the directory and the filename + /// must match. If \a full is false, then the directory names for + /// \a lhs and \a rhs are only compared if they are both not empty. + /// This allows a FileSpec object to only contain a filename + /// and it can match FileSpec objects that have matching + /// filenames with different paths. + /// + /// @param[in] lhs + /// A const reference to the Left Hand Side object to compare. + /// + /// @param[in] rhs + /// A const reference to the Right Hand Side object to compare. + /// + /// @param[in] full + /// If true, then both the directory and filenames will have to + /// match for a compare to return zero (equal to). If false + /// and either directory from \a lhs or \a rhs is empty, then + /// only the filename will be compared, else a full comparison + /// is done. + /// + /// @return + /// @li -1 if \a lhs is less than \a rhs + /// @li 0 if \a lhs is equal to \a rhs + /// @li 1 if \a lhs is greater than \a rhs + //------------------------------------------------------------------ + static int + Compare (const FileSpec& lhs, const FileSpec& rhs, bool full); + + static bool + Equal (const FileSpec& a, const FileSpec& b, bool full); + + //------------------------------------------------------------------ + /// Dump this object to a Stream. + /// + /// Dump the object to the supplied stream \a s. If the object + /// contains a valid directory name, it will be displayed followed + /// by a directory delimiter, and the filename. + /// + /// @param[in] s + /// The stream to which to dump the object descripton. + //------------------------------------------------------------------ + void + Dump (Stream *s) const; + + //------------------------------------------------------------------ + /// Existence test. + /// + /// @return + /// \b true if the file exists on disk, \b false otherwise. + //------------------------------------------------------------------ + bool + Exists () const; + + uint64_t + GetByteSize() const; + + //------------------------------------------------------------------ + /// Directory string get accessor. + /// + /// @return + /// A reference to the directory string object. + //------------------------------------------------------------------ + ConstString & + GetDirectory (); + + //------------------------------------------------------------------ + /// Directory string const get accessor. + /// + /// @return + /// A const reference to the directory string object. + //------------------------------------------------------------------ + const ConstString & + GetDirectory () const; + + //------------------------------------------------------------------ + /// Filename string get accessor. + /// + /// @return + /// A reference to the filename string object. + //------------------------------------------------------------------ + ConstString & + GetFilename (); + + //------------------------------------------------------------------ + /// Filename string const get accessor. + /// + /// @return + /// A const reference to the filename string object. + //------------------------------------------------------------------ + const ConstString & + GetFilename () const; + + TimeValue + GetModificationTime () const; + + //------------------------------------------------------------------ + /// Extract the full path to the file. + /// + /// Extract the directory and path into a fixed buffer. This is + /// needed as the directory and path are stored in separate string + /// values. + /// + /// @param[out] path + /// The buffer in which to place the extracted full path. + /// + /// @param[in] max_path_length + /// The maximum length or \a path. + /// + /// @return + /// \b true if the extracted fullpath fits into \a path, \b + /// false otherwise. + //------------------------------------------------------------------ + bool + GetPath (char *path, size_t max_path_length) const; + + FileType + GetFileType () const; + + //------------------------------------------------------------------ + /// Get the memory cost of this object. + /// + /// Return the size in bytes that this object takes in memory. This + /// returns the size in bytes of this object, not any shared string + /// values it may refer to. + /// + /// @return + /// The number of bytes that this object occupies in memory. + /// + /// @see ConstString::StaticMemorySize () + //------------------------------------------------------------------ + size_t + MemorySize () const; + + //------------------------------------------------------------------ + /// Memory map part of, or the entire contents of, a file. + /// + /// Returns a shared pointer to a data buffer that contains all or + /// part of the contents of a file. The data is memory mapped and + /// will lazily page in data from the file as memory is accessed. + /// The data that is mappped will start \a offset bytes into the + /// file, and \a length bytes will be mapped. If \a length is + /// greater than the number of bytes available in the file starting + /// at \a offset, the number of bytes will be appropriately + /// truncated. The final number of bytes that get mapped can be + /// verified using the DataBuffer::GetByteSize() function on the return + /// shared data pointer object contents. + /// + /// @param[in] offset + /// The offset in bytes from the beginning of the file where + /// memory mapping should begin. + /// + /// @param[in] length + /// The size in bytes that should be mapped starting \a offset + /// bytes into the file. If \a length is \c SIZE_T_MAX, map + /// as many bytes as possible. + /// + /// @return + /// A shared pointer to the memeory mapped data. This shared + /// pointer can contain a NULL DataBuffer pointer, so the contained + /// pointer must be checked prior to using it. + //------------------------------------------------------------------ + lldb::DataBufferSP + MemoryMapFileContents (off_t offset = 0, size_t length = SIZE_T_MAX) const; + + //------------------------------------------------------------------ + /// Read part of, or the entire contents of, a file into a heap based data buffer. + /// + /// Returns a shared pointer to a data buffer that contains all or + /// part of the contents of a file. The data copies into a heap based + /// buffer that lives in the DataBuffer shared pointer object returned. + /// The data that is cached will start \a offset bytes into the + /// file, and \a length bytes will be mapped. If \a length is + /// greater than the number of bytes available in the file starting + /// at \a offset, the number of bytes will be appropriately + /// truncated. The final number of bytes that get mapped can be + /// verified using the DataBuffer::GetByteSize() function. + /// + /// @param[in] offset + /// The offset in bytes from the beginning of the file where + /// memory mapping should begin. + /// + /// @param[in] length + /// The size in bytes that should be mapped starting \a offset + /// bytes into the file. If \a length is \c SIZE_T_MAX, map + /// as many bytes as possible. + /// + /// @return + /// A shared pointer to the memeory mapped data. This shared + /// pointer can contain a NULL DataBuffer pointer, so the contained + /// pointer must be checked prior to using it. + //------------------------------------------------------------------ + lldb::DataBufferSP + ReadFileContents (off_t offset = 0, size_t length = SIZE_T_MAX) const; + + //------------------------------------------------------------------ + /// Change the file specificed with a new path. + /// + /// Update the contents of this object with a new path. The path will + /// be split up into a directory and filename and stored as uniqued + /// string values for quick comparison and efficient memory usage. + /// + /// @param[in] path + /// A full, partial, or relative path to a file. + //------------------------------------------------------------------ + void + SetFile (const char *path); + + //------------------------------------------------------------------ + /// Read the file into an array of strings, one per line. + /// + /// Opens and reads the file in this object into an array of strings, + /// one string per line of the file. Returns a boolean indicating + /// success or failure. + /// + /// @param[out] lines + /// The string array into which to read the file. + //------------------------------------------------------------------ + bool + ReadFileLines (STLStringArray &lines); + + static int + Resolve (const char *src_path, char *dst_path, size_t dst_len); + +protected: + //------------------------------------------------------------------ + // Member variables + //------------------------------------------------------------------ + ConstString m_directory; ///< The uniqued directory path + ConstString m_filename; ///< The uniqued filename path +}; + +//---------------------------------------------------------------------- +/// Dump a FileSpec object to a stream +//---------------------------------------------------------------------- +Stream& operator << (Stream& s, const FileSpec& f); + +} // namespace lldb_private + +#endif // #if defined(__cplusplus) +#endif // liblldb_FileSpec_h_ |
