57 lines
1.6 KiB
C++
57 lines
1.6 KiB
C++
/* Copyright (C) 1979-1996 TcX AB & Monty Program KB & Detron HB
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This software is distributed with NO WARRANTY OF ANY KIND. No author or
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distributor accepts any responsibility for the consequences of using it, or
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for whether it serves any particular purpose or works at all, unless he or
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she says so in writing. Refer to the Free Public License (the "License")
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for full details.
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Every copy of this file must include a copy of the License, normally in a
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plain ASCII text file named PUBLIC. The License grants you the right to
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copy, modify and redistribute this file, but only under certain conditions
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described in the License. Among other things, the License requires that
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the copyright notice and this notice be preserved on all copies. */
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/* interface for memory mapped files */
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#ifdef __GNUC__
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#pragma interface /* gcc class implementation */
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#endif
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class mapped_files :public ilink {
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byte *map;
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ha_rows size;
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char *name; // name of mapped file
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File file; // >= 0 if open
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int error; // If not mapped
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uint use_count;
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public:
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mapped_files(const my_string name,byte *magic,uint magic_length);
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~mapped_files();
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friend class mapped_file;
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friend mapped_files *map_file(const my_string name,byte *magic,
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uint magic_length);
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friend void unmap_file(mapped_files *map);
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};
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class mapped_file
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{
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mapped_files *file;
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public:
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mapped_file(const my_string name,byte *magic,uint magic_length)
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{
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file=map_file(name,magic,magic_length); /* old or new map */
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}
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~mapped_file()
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{
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unmap_file(file); /* free map */
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}
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byte *map()
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{
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return file->map;
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}
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};
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