Mercurial > hg > graal-compiler
diff src/share/vm/adlc/filebuff.hpp @ 0:a61af66fc99e jdk7-b24
Initial load
author | duke |
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date | Sat, 01 Dec 2007 00:00:00 +0000 |
parents | |
children | 3e82d72933d0 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/src/share/vm/adlc/filebuff.hpp Sat Dec 01 00:00:00 2007 +0000 @@ -0,0 +1,103 @@ +/* + * Copyright 1997-2004 Sun Microsystems, Inc. All Rights Reserved. + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. + * + * This code is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 only, as + * published by the Free Software Foundation. + * + * This code is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License + * version 2 for more details (a copy is included in the LICENSE file that + * accompanied this code). + * + * You should have received a copy of the GNU General Public License version + * 2 along with this work; if not, write to the Free Software Foundation, + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. + * + * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, + * CA 95054 USA or visit www.sun.com if you need additional information or + * have any questions. + * + */ + +// FILEBUFF.HPP - Definitions for parser file buffering routines + +#if _MSC_VER >= 1300 // Visual C++ 7.0 or later +#include <iostream> +#else +#include <iostream.h> +#endif + +// STRUCTURE FOR HANDLING INPUT AND OUTPUT FILES +typedef struct { + const char *_name; + FILE *_fp; +} BufferedFile; + +class ArchDesc; + +//------------------------------FileBuff-------------------------------------- +// This class defines a nicely behaved buffer of text. Entire file of text +// is read into buffer at creation, with sentinals at start and end. +class FileBuff { + friend class FileBuffRegion; + private: + long _bufferSize; // Size of text holding buffer. + long _offset; // Expected filepointer offset. + long _bufoff; // Start of buffer file offset + + char *_buf; // The buffer itself. + char *_bigbuf; // The buffer plus sentinals; actual heap area + char *_bufmax; // A pointer to the buffer end sentinal + char *_bufeol; // A pointer to the last complete line end + + int _err; // Error flag for file seek/read operations + long _filepos; // Current offset from start of file + + ArchDesc& _AD; // Reference to Architecture Description + + // Error reporting function + void file_error(int flag, int linenum, const char *fmt, ...); + + public: + const BufferedFile *_fp; // File to be buffered + + FileBuff(BufferedFile *fp, ArchDesc& archDesc); // Constructor + ~FileBuff(); // Destructor + + // This returns a pointer to the start of the current line in the buffer, + // and increments bufeol and filepos to point at the end of that line. + char *get_line(void); + + // This converts a pointer into the buffer to a file offset. It only works + // when the pointer is valid (i.e. just obtained from getline()). + int getoff(const char *s) { return _bufoff+(int)(s-_buf); } +}; + +//------------------------------FileBuffRegion--------------------------------- +// A buffer region is really a region of some file, specified as a linked list +// of offsets and lengths. These regions can be merged; overlapping regions +// will coalesce. +class FileBuffRegion { + public: // Workaround dev-studio friend/private bug + FileBuffRegion *_next; // Linked list of regions sorted by offset. + private: + FileBuff *_bfr; // The Buffer of the file + int _offset, _length; // The file area + int _sol; // Start of line where the file area starts + int _line; // First line of region + + public: + FileBuffRegion(FileBuff*, int sol, int line, int offset, int len); + ~FileBuffRegion(); + + FileBuffRegion *copy(); // Deep copy + FileBuffRegion *merge(FileBuffRegion*); // Merge 2 regions; delete input + +// void print(std::ostream&); +// friend std::ostream& operator<< (std::ostream&, FileBuffRegion&); + void print(ostream&); + friend ostream& operator<< (ostream&, FileBuffRegion&); +};