1 files changed, 101 insertions, 0 deletions

diff --git a/src/main/extractor_datasource.h b/src/main/extractor_datasource.h
new file mode 100644
index 0000000..5037377
--- /dev/null
+++ b/src/main/extractor_datasource.h
@@ -0,0 +1,101 @@
+/*
+     This file is part of libextractor.
+     (C) 2002, 2003, 2004, 2005, 2006, 2009, 2012 Vidyut Samanta and Christian Grothoff
+
+     libextractor is free software; you can redistribute it and/or modify
+     it under the terms of the GNU General Public License as published
+     by the Free Software Foundation; either version 3, or (at your
+     option) any later version.
+
+     libextractor 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 for more details.
+
+     You should have received a copy of the GNU General Public License
+     along with libextractor; see the file COPYING.  If not, write to the
+     Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+     Boston, MA 02111-1307, USA.
+ */
+#ifndef EXTRACTOR_DATASOURCE_H
+#define EXTRACTOR_DATASOURCE_H
+
+/**
+ * Handle to a datasource we can use for the plugins.
+ */ 
+struct EXTRACTOR_Datasource;
+
+
+/**
+ * Create a datasource from a file on disk.
+ *
+ * @param filename name of the file on disk
+ * @return handle to the datasource
+ */
+struct EXTRACTOR_Datasource *
+EXTRACTOR_datasource_create_from_file_ (const char *filename);
+
+
+/**
+ * Create a datasource from a buffer in memory.
+ *
+ * @param buf data in memory
+ * @param size number of bytes in 'buf'
+ * @return handle to the datasource
+ */
+struct EXTRACTOR_Datasource *
+EXTRACTOR_datasource_create_from_buffer_ (const char *buf,
+                                          size_t size);
+
+
+/**
+ * Destroy a data source.
+ *
+ * @param datasource source to destroy
+ */
+void
+EXTRACTOR_datasource_destroy_ (struct EXTRACTOR_Datasource *datasource);
+
+
+/**
+ * Make 'size' bytes of data from the data source available at '*data'.
+ *
+ * @param cls must be a 'struct EXTRACTOR_Datasource'
+ * @param data where the data should be copied to
+ * @param size maximum number of bytes requested
+ * @return number of bytes now available in data (can be smaller than 'size'),
+ *         -1 on error
+ */
+ssize_t
+EXTRACTOR_datasource_read_ (void *cls,
+                            void *data,
+                            size_t size);
+
+
+/**
+ * Seek in the datasource.  Use 'SEEK_CUR' for whence and 'pos' of 0 to
+ * obtain the current position in the file.
+ * 
+ * @param cls must be a 'struct EXTRACTOR_Datasource'
+ * @param pos position to seek (see 'man lseek')
+ * @param whence how to see (absolute to start, relative, absolute to end)
+ * @return new absolute position, UINT64_MAX on error (i.e. desired position
+ *         does not exist)
+ */
+uint64_t
+EXTRACTOR_datasource_seek_ (void *cls,
+                            uint64_t pos,
+                            int whence);
+
+
+/**
+ * Determine the overall size of the data source (after compression).
+ * 
+ * @param cls must be a 'struct EXTRACTOR_Datasource'
+ * @return overall file size, UINT64_MAX on error (i.e. IPC failure)
+ */ 
+uint64_t 
+EXTRACTOR_datasource_get_size_ (void *cls);
+
+
+#endif