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diff --git a/src/lzma/io.h b/src/lzma/io.h
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+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file io.h
+/// \brief I/O types and functions
+//
+// Copyright (C) 2007 Lasse Collin
+//
+// This program is free software; you can redistribute it and/or
+// modify it under the terms of the GNU Lesser General Public
+// License as published by the Free Software Foundation; either
+// version 2.1 of the License, or (at your option) any later version.
+//
+// This program 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
+// Lesser General Public License for more details.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#ifndef IO_H
+#define IO_H
+
+#include "private.h"
+
+#if BUFSIZ <= 1024
+# define IO_BUFFER_SIZE 8192
+#else
+# define IO_BUFFER_SIZE BUFSIZ
+#endif
+
+
+typedef struct {
+ const char *src_name;
+ char *dest_name;
+
+ int dir_fd;
+ int src_fd;
+ int dest_fd;
+
+ struct stat src_st;
+ ino_t dest_ino;
+
+ bool src_eof;
+} file_pair;
+
+
+extern void io_init(void);
+
+extern void io_finish(void);
+
+extern file_pair *io_open(const char *src_name);
+
+extern void io_close(file_pair *pair, bool success);
+
+extern size_t io_read(file_pair *pair, uint8_t *buf, size_t size);
+
+extern int io_write(const file_pair *pair, const uint8_t *buf, size_t size);
+
+
+#endif