/*

 * The Sleuth Kit

 *

 * Brian Carrier [carrier <at> sleuthkit [dot] org]

 * Copyright (c) 2005-2011 Brian Carrier.  All rights reserved

 *

 * This software is distributed under the Common Public License 1.0

 *

 */

/** \file fs_load.c

 * Contains a general file walk callback that can be

 * used to load file content into a buffer.

 */

#include "tsk_fs_i.h"

#include <string.h>

/* File Walk Action to load the journal

 * TSK_FS_LOAD_FILE is defined in fs_tools.h

*/

TSK_WALK_RET_ENUM

tsk_fs_load_file_action(

  [[maybe_unused]] TSK_FS_FILE * fs_file,

  [[maybe_unused]] TSK_OFF_T a_off,

  [[maybe_unused]] TSK_DADDR_T addr,

  char *buf,

  size_t size,

  [[maybe_unused]] TSK_FS_BLOCK_FLAG_ENUM flags,

  void *ptr)

{

    TSK_FS_LOAD_FILE *buf1 = (TSK_FS_LOAD_FILE *) ptr;

    if (buf1->cur == NULL) {

        return TSK_WALK_ERROR;

    }

    size_t cp_size = size;

    if (cp_size > buf1->left) cp_size = buf1->left;

    size_t cp_offset = (size_t) (buf1->cur - buf1->base);

    if ((cp_size > buf1->total) || (cp_offset > (buf1->total - cp_size))) {

        return TSK_WALK_ERROR;

    }

    memcpy(buf1->cur, buf, cp_size);

    buf1->left -= cp_size;

    buf1->cur = (char *) ((uintptr_t) buf1->cur + cp_size);

    if (buf1->left > 0)

        return TSK_WALK_CONT;

    else

        return TSK_WALK_STOP;

}