/*============================================================================
  KWSys - Kitware System Library
  Copyright 2000-2009 Kitware, Inc., Insight Software Consortium

  Distributed under the OSI-approved BSD License (the "License");
  see accompanying file Copyright.txt for details.

  This software is distributed WITHOUT ANY WARRANTY; without even the
  implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  See the License for more information.
============================================================================*/
#ifndef vtksys_MD5_h
#define vtksys_MD5_h

#include <vtksys/Configure.h>

/* Redefine all public interface symbol names to be in the proper
   namespace.  These macros are used internally to kwsys only, and are
   not visible to user code.  Use kwsysHeaderDump.pl to reproduce
   these macros after making changes to the interface.  */
#if !defined(KWSYS_NAMESPACE)
# define kwsys_ns(x) vtksys##x
# define kwsysEXPORT vtksys_EXPORT
#endif
#if !vtksys_NAME_IS_KWSYS
# define kwsysMD5                 kwsys_ns(MD5)
# define kwsysMD5_s               kwsys_ns(MD5_s)
# define kwsysMD5_New             kwsys_ns(MD5_New)
# define kwsysMD5_Delete          kwsys_ns(MD5_Delete)
# define kwsysMD5_Initialize      kwsys_ns(MD5_Initialize)
# define kwsysMD5_Append          kwsys_ns(MD5_Append)
# define kwsysMD5_Finalize        kwsys_ns(MD5_Finalize)
# define kwsysMD5_FinalizeHex     kwsys_ns(MD5_FinalizeHex)
# define kwsysMD5_DigestToHex     kwsys_ns(MD5_DigestToHex)
#endif

#if defined(__cplusplus)
extern "C"
{
#endif

/**
 * MD5 state data structure.
 */
typedef struct kwsysMD5_s kwsysMD5;

/**
 * Create a new MD5 instance.  The returned instance is not initialized.
 */
kwsysEXPORT kwsysMD5* kwsysMD5_New(void);

/**
 * Delete an old MD5 instance.
 */
kwsysEXPORT void kwsysMD5_Delete(kwsysMD5* md5);

/**
 * Initialize a new MD5 digest.
 */
kwsysEXPORT void kwsysMD5_Initialize(kwsysMD5* md5);

/**
 * Append data to an MD5 digest.  If the given length is negative,
 * data will be read up to but not including a terminating null.
 */
kwsysEXPORT void kwsysMD5_Append(kwsysMD5* md5, unsigned char const* data,
                                 int length);

/**
 * Finalize a MD5 digest and get the 16-byte hash value.
 */
kwsysEXPORT void kwsysMD5_Finalize(kwsysMD5* md5, unsigned char digest[16]);

/**
 * Finalize a MD5 digest and get the 32-bit hexadecimal representation.
 */
kwsysEXPORT void kwsysMD5_FinalizeHex(kwsysMD5* md5, char buffer[32]);

/**
 * Convert a MD5 digest 16-byte value to a 32-byte hexadecimal representation.
 */
kwsysEXPORT void kwsysMD5_DigestToHex(unsigned char const digest[16],
                                      char buffer[32]);

#if defined(__cplusplus)
} /* extern "C" */
#endif

/* If we are building a kwsys .c or .cxx file, let it use these macros.
   Otherwise, undefine them to keep the namespace clean.  */
#if !defined(KWSYS_NAMESPACE)
# undef kwsys_ns
# undef kwsysEXPORT
# if !vtksys_NAME_IS_KWSYS
#  undef kwsysMD5
#  undef kwsysMD5_s
#  undef kwsysMD5_New
#  undef kwsysMD5_Delete
#  undef kwsysMD5_Initialize
#  undef kwsysMD5_Append
#  undef kwsysMD5_Finalize
#  undef kwsysMD5_FinalizeHex
#  undef kwsysMD5_DigestToHex
# endif
#endif

#endif
