libextractor

GNU libextractor
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test2_extractor.c (3714B)

      1 /*
      2      This file is part of libextractor.
      3      Copyright (C) 2012 Vidyut Samanta and Christian Grothoff
      4 
      5      libextractor is free software; you can redistribute it and/or modify
      6      it under the terms of the GNU General Public License as published
      7      by the Free Software Foundation; either version 3, or (at your
      8      option) any later version.
      9 
     10      libextractor is distributed in the hope that it will be useful, but
     11      WITHOUT ANY WARRANTY; without even the implied warranty of
     12      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     13      General Public License for more details.
     14 
     15      You should have received a copy of the GNU General Public License
     16      along with libextractor; see the file COPYING.  If not, write to the
     17      Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
     18      Boston, MA 02110-1301, USA.
     19  */
     20 /**
     21  * @file main/test2_extractor.c
     22  * @brief plugin for testing GNU libextractor
     23  * Data file (or buffer) for this test must be 150 * 1024 bytes long,
     24  * first 4 bytes must be "test", all other bytes should be equal to
     25  * <FILE_OFFSET> % 256. The test client must return 0 after seeing
     26  * "Hello World!" metadata, and return 1 after seeing "Goodbye!"
     27  * metadata.
     28  * @author Christian Grothoff
     29  */
     30 #include "platform.h"
     31 #include "extractor.h"
     32 #include <string.h>
     33 #include <stdio.h>
     34 #include <sys/types.h>
     35 #include <sys/stat.h>
     36 #include <unistd.h>
     37 #include <stdlib.h>
     38 
     39 
     40 /**
     41  * Signature of the extract method that each plugin
     42  * must provide.
     43  *
     44  * @param ec extraction context provided to the plugin
     45  */
     46 void
     47 EXTRACTOR_test2_extract_method (struct EXTRACTOR_ExtractContext *ec)
     48 {
     49   void *dp;
     50 
     51   if ((NULL == ec->config) || (0 != strcmp (ec->config, "test2")))
     52     return; /* only run in test mode */
     53   if (4 != ec->read (ec->cls, &dp, 4))
     54   {
     55     fprintf (stderr, "Reading at offset 0 failed\n");
     56     ABORT ();
     57   }
     58   if (0 != strncmp ("test", dp, 4))
     59   {
     60     fprintf (stderr, "Unexpected data at offset 0\n");
     61     ABORT ();
     62   }
     63   if ( (1024 * 150 != ec->get_size (ec->cls)) &&
     64        (UINT64_MAX != ec->get_size (ec->cls)) )
     65   {
     66     fprintf (stderr, "Unexpected file size returned (expected 150k)\n");
     67     ABORT ();
     68   }
     69   if (1024 * 100 + 4 != ec->seek (ec->cls, 1024 * 100 + 4, SEEK_SET))
     70   {
     71     fprintf (stderr, "Failure to seek (SEEK_SET)\n");
     72     ABORT ();
     73   }
     74   if (1 != ec->read (ec->cls, &dp, 1))
     75   {
     76     fprintf (stderr, "Failure to read at 100k + 4\n");
     77     ABORT ();
     78   }
     79   if ((1024 * 100 + 4) % 256 != *(unsigned char *) dp)
     80   {
     81     fprintf (stderr, "Unexpected data at offset 100k + 4\n");
     82     ABORT ();
     83   }
     84   if (((1024 * 100 + 4) + 1 - (1024 * 50 + 7)) !=
     85       ec->seek (ec->cls, -(1024 * 50 + 7), SEEK_CUR))
     86   {
     87     fprintf (stderr, "Failure to seek (SEEK_SET)\n");
     88     ABORT ();
     89   }
     90   if (1 != ec->read (ec->cls, &dp, 1))
     91   {
     92     fprintf (stderr, "Failure to read at 50k - 3\n");
     93     ABORT ();
     94   }
     95   if (((1024 * 100 + 4) + 1 - (1024 * 50 + 7)) % 256 != *(unsigned char *) dp)
     96   {
     97     fprintf (stderr, "Unexpected data at offset 100k - 3\n");
     98     ABORT ();
     99   }
    100   if (1024 * 150 != ec->seek (ec->cls, 0, SEEK_END))
    101   {
    102     fprintf (stderr, "Failure to seek (SEEK_END)\n");
    103     ABORT ();
    104   }
    105   if (0 != ec->read (ec->cls, &dp, 1))
    106   {
    107     fprintf (stderr, "Failed to receive EOF at 150k\n");
    108     ABORT ();
    109   }
    110   if (1024 * 150 - 2 != ec->seek (ec->cls, -2, SEEK_END))
    111   {
    112     fprintf (stderr, "Failure to seek (SEEK_END - 2)\n");
    113     ABORT ();
    114   }
    115   if (1 != ec->read (ec->cls, &dp, 1))
    116   {
    117     fprintf (stderr, "Failure to read at 150k - 3\n");
    118     ABORT ();
    119   }
    120   if ((1024 * 150 - 2) % 256 != *(unsigned char *) dp)
    121   {
    122     fprintf (stderr, "Unexpected data at offset 150k - 3\n");
    123     ABORT ();
    124   }
    125 }
    126 
    127 
    128 /* end of test2_extractor.c */