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/*
This file is part of libextractor.
Copyright (C) 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., 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301, USA.
*/
/**
* @file main/test_extractor.c
* @brief plugin for testing GNU libextractor
* Data file (or buffer) for this test must be 150 * 1024 bytes long,
* first 4 bytes must be "test", all other bytes should be equal to
* <FILE_OFFSET> % 256. The test client must return 0 after seeing
* "Hello World!" metadata, and return 1 after seeing "Goodbye!"
* metadata.
* @author Christian Grothoff
*/
#include "platform.h"
#include "extractor.h"
#include <string.h>
#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <stdlib.h>
/**
* Signature of the extract method that each plugin
* must provide.
*
* @param ec extraction context provided to the plugin
*/
_EXTRACTOR_EXTERN void
EXTRACTOR_test_extract_method (struct EXTRACTOR_ExtractContext *ec)
{
void *dp;
if ((NULL == ec->config) || (0 != strcmp (ec->config, "test")))
return; /* only run in test mode */
if (4 != ec->read (ec->cls, &dp, 4))
{
fprintf (stderr, "Reading at offset 0 failed\n");
ABORT ();
}
if (0 != strncmp ("test", dp, 4))
{
fprintf (stderr, "Unexpected data at offset 0\n");
ABORT ();
}
if ( (1024 * 150 != ec->get_size (ec->cls)) &&
(UINT64_MAX != ec->get_size (ec->cls)) )
{
fprintf (stderr, "Unexpected file size returned (expected 150k)\n");
ABORT ();
}
if (1024 * 100 + 4 != ec->seek (ec->cls, 1024 * 100 + 4, SEEK_SET))
{
fprintf (stderr, "Failure to seek (SEEK_SET)\n");
ABORT ();
}
if (1 != ec->read (ec->cls, &dp, 1))
{
fprintf (stderr, "Failure to read at 100k + 4\n");
ABORT ();
}
if ((1024 * 100 + 4) % 256 != * (unsigned char *) dp)
{
fprintf (stderr, "Unexpected data at offset 100k + 4\n");
ABORT ();
}
if (((1024 * 100 + 4) + 1 - (1024 * 50 + 7)) !=
ec->seek (ec->cls, - (1024 * 50 + 7), SEEK_CUR))
{
fprintf (stderr, "Failure to seek (SEEK_SET)\n");
ABORT ();
}
if (1 != ec->read (ec->cls, &dp, 1))
{
fprintf (stderr, "Failure to read at 50k - 3\n");
ABORT ();
}
if (((1024 * 100 + 4) + 1 - (1024 * 50 + 7)) % 256 != * (unsigned char *) dp)
{
fprintf (stderr, "Unexpected data at offset 100k - 3\n");
ABORT ();
}
if (1024 * 150 != ec->seek (ec->cls, 0, SEEK_END))
{
fprintf (stderr, "Failure to seek (SEEK_END)\n");
ABORT ();
}
if (0 != ec->read (ec->cls, &dp, 1))
{
fprintf (stderr, "Failed to receive EOF at 150k\n");
ABORT ();
}
if (1024 * 150 - 2 != ec->seek (ec->cls, -2, SEEK_END))
{
fprintf (stderr, "Failure to seek (SEEK_END - 2)\n");
ABORT ();
}
if (1 != ec->read (ec->cls, &dp, 1))
{
fprintf (stderr, "Failure to read at 150k - 3\n");
ABORT ();
}
if ((1024 * 150 - 2) % 256 != * (unsigned char *) dp)
{
fprintf (stderr, "Unexpected data at offset 150k - 3\n");
ABORT ();
}
if (0 != ec->proc (ec->cls, "test", EXTRACTOR_METATYPE_COMMENT,
EXTRACTOR_METAFORMAT_UTF8, "<no mime>", "Hello world!",
strlen ("Hello world!") + 1))
{
fprintf (stderr, "Unexpected return value from 'proc'\n");
ABORT ();
}
/* The test assumes that client orders us to stop extraction
* after seeing "Goodbye!".
*/
if (1 != ec->proc (ec->cls, "test", EXTRACTOR_METATYPE_COMMENT,
EXTRACTOR_METAFORMAT_UTF8, "<no mime>", "Goodbye!",
strlen ("Goodbye!") + 1))
{
fprintf (stderr, "Unexpected return value from 'proc'\n");
ABORT ();
}
}
/* end of test_extractor.c */
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