/* ************************************************************************** */
/* *             For conditions of distribution and use,                    * */
/* *                see copyright notice in libmng.h                        * */
/* ************************************************************************** */
/* *                                                                        * */
/* * project   : libmng                                                     * */
/* * file      : libmng_hlapi.c            copyright (c) 2000-2007 G.Juyn   * */
/* * version   : 1.0.10                                                     * */
/* *                                                                        * */
/* * purpose   : high-level application API (implementation)                * */
/* *                                                                        * */
/* * author    : G.Juyn                                                     * */
/* *                                                                        * */
/* * comment   : implementation of the high-level function interface        * */
/* *             for applications.                                          * */
/* *                                                                        * */
/* * changes   : 0.5.1 - 05/06/2000 - G.Juyn                                * */
/* *             - added init of iPLTEcount                                 * */
/* *             0.5.1 - 05/08/2000 - G.Juyn                                * */
/* *             - changed calling-convention definition                    * */
/* *             - changed status-handling of display-routines              * */
/* *             - added versioning-control routines                        * */
/* *             - filled the write routine                                 * */
/* *             - changed strict-ANSI stuff                                * */
/* *             0.5.1 - 05/11/2000 - G.Juyn                                * */
/* *             - added callback error-reporting support                   * */
/* *             0.5.1 - 05/12/2000 - G.Juyn                                * */
/* *             - changed trace to macro for callback error-reporting      * */
/* *             0.5.1 - 05/13/2000 - G.Juyn                                * */
/* *             - added eMNGma hack (will be removed in 1.0.0 !!!)         * */
/* *             - added TERM animation object pointer (easier reference)   * */
/* *             0.5.1 - 05/14/2000 - G.Juyn                                * */
/* *             - added cleanup of saved-data (SAVE/SEEK processing)       * */
/* *             0.5.1 - 05/16/2000 - G.Juyn                                * */
/* *             - moved the actual write_graphic functionality from here   * */
/* *               to its appropriate function in the mng_write module      * */
/* *                                                                        * */
/* *             0.5.2 - 05/19/2000 - G.Juyn                                * */
/* *             - cleaned up some code regarding mixed support             * */
/* *             - added JNG support                                        * */
/* *             0.5.2 - 05/24/2000 - G.Juyn                                * */
/* *             - moved init of default zlib parms here from "mng_zlib.c"  * */
/* *             - added init of default IJG parms                          * */
/* *             0.5.2 - 05/29/2000 - G.Juyn                                * */
/* *             - fixed inconsistancy with freeing global iCCP profile     * */
/* *             0.5.2 - 05/30/2000 - G.Juyn                                * */
/* *             - added delta-image field initialization                   * */
/* *             0.5.2 - 06/06/2000 - G.Juyn                                * */
/* *             - added initialization of the buffer-suspend parameter     * */
/* *                                                                        * */
/* *             0.5.3 - 06/16/2000 - G.Juyn                                * */
/* *             - added initialization of update-region for refresh        * */
/* *             - added initialization of Needrefresh parameter            * */
/* *             0.5.3 - 06/17/2000 - G.Juyn                                * */
/* *             - added initialization of Deltaimmediate                   * */
/* *             0.5.3 - 06/21/2000 - G.Juyn                                * */
/* *             - added initialization of Speed                            * */
/* *             - added initialization of Imagelevel                       * */
/* *             0.5.3 - 06/26/2000 - G.Juyn                                * */
/* *             - changed userdata variable to mng_ptr                     * */
/* *             0.5.3 - 06/29/2000 - G.Juyn                                * */
/* *             - fixed initialization routine for new mng_handle type     * */
/* *                                                                        * */
/* *             0.9.1 - 07/06/2000 - G.Juyn                                * */
/* *             - changed mng_display_resume to allow to be called after   * */
/* *               a suspension return with MNG_NEEDMOREDATA                * */
/* *             - added returncode MNG_NEEDTIMERWAIT for timer breaks      * */
/* *             0.9.1 - 07/07/2000 - G.Juyn                                * */
/* *             - implemented support for freeze/reset/resume & go_xxxx    * */
/* *             0.9.1 - 07/08/2000 - G.Juyn                                * */
/* *             - added support for improved timing                        * */
/* *             - added support for improved I/O-suspension                * */
/* *             0.9.1 - 07/14/2000 - G.Juyn                                * */
/* *             - changed EOF processing behavior                          * */
/* *             0.9.1 - 07/15/2000 - G.Juyn                                * */
/* *             - added callbacks for SAVE/SEEK processing                 * */
/* *             - added variable for NEEDSECTIONWAIT breaks                * */
/* *             - added variable for freeze & reset processing             * */
/* *             0.9.1 - 07/17/2000 - G.Juyn                                * */
/* *             - added error cleanup processing                           * */
/* *             - fixed support for mng_display_reset()                    * */
/* *             - fixed suspension-buffering for 32K+ chunks               * */
/* *                                                                        * */
/* *             0.9.2 - 07/29/2000 - G.Juyn                                * */
/* *             - fixed small bugs in display processing                   * */
/* *             0.9.2 - 07/31/2000 - G.Juyn                                * */
/* *             - fixed wrapping of suspension parameters                  * */
/* *             0.9.2 - 08/04/2000 - G.Juyn                                * */
/* *             - B111096 - fixed large-buffer read-suspension             * */
/* *             0.9.2 - 08/05/2000 - G.Juyn                                * */
/* *             - changed file-prefixes                                    * */
/* *                                                                        * */
/* *             0.9.3 - 09/07/2000 - G.Juyn                                * */
/* *             - added support for new filter_types                       * */
/* *             0.9.3 - 09/10/2000 - G.Juyn                                * */
/* *             - fixed DEFI behavior                                      * */
/* *             0.9.3 - 10/11/2000 - G.Juyn                                * */
/* *             - added support for nEED                                   * */
/* *             0.9.3 - 10/16/2000 - G.Juyn                                * */
/* *             - added optional support for bKGD for PNG images           * */
/* *             - raised initial maximum canvas size                       * */
/* *             - added support for JDAA                                   * */
/* *             0.9.3 - 10/17/2000 - G.Juyn                                * */
/* *             - added callback to process non-critical unknown chunks    * */
/* *             - fixed support for delta-images during read() / display() * */
/* *             0.9.3 - 10/18/2000 - G.Juyn                                * */
/* *             - added closestream() processing for mng_cleanup()         * */
/* *             0.9.3 - 10/27/2000 - G.Juyn                                * */
/* *             - fixed separate read() & display() processing             * */
/* *                                                                        * */
/* *             0.9.4 - 11/20/2000 - G.Juyn                                * */
/* *             - fixed unwanted repetition in mng_readdisplay()           * */
/* *             0.9.4 - 11/24/2000 - G.Juyn                                * */
/* *             - moved restore of object 0 to libmng_display              * */
/* *                                                                        * */
/* *             1.0.1 - 02/08/2001 - G.Juyn                                * */
/* *             - added MEND processing callback                           * */
/* *             1.0.1 - 02/13/2001 - G.Juyn                                * */
/* *             - fixed first FRAM_MODE=4 timing problem                   * */
/* *             1.0.1 - 04/21/2001 - G.Juyn                                * */
/* *             - fixed bug with display_reset/display_resume (Thanks G!)  * */
/* *             1.0.1 - 04/22/2001 - G.Juyn                                * */
/* *             - fixed memory-leak (Thanks Gregg!)                        * */
/* *             1.0.1 - 04/23/2001 - G.Juyn                                * */
/* *             - fixed reset_rundata to drop all objects                  * */
/* *             1.0.1 - 04/25/2001 - G.Juyn                                * */
/* *             - moved mng_clear_cms to libmng_cms                        * */
/* *                                                                        * */
/* *             1.0.2 - 06/23/2001 - G.Juyn                                * */
/* *             - added optimization option for MNG-video playback         * */
/* *             - added processterm callback                               * */
/* *             1.0.2 - 06/25/2001 - G.Juyn                                * */
/* *             - added option to turn off progressive refresh             * */
/* *                                                                        * */
/* *             1.0.5 - 07/08/2002 - G.Juyn                                * */
/* *             - B578572 - removed eMNGma hack (thanks Dimitri!)          * */
/* *             1.0.5 - 07/16/2002 - G.Juyn                                * */
/* *             - B581625 - large chunks fail with suspension reads        * */
/* *             1.0.5 - 08/19/2002 - G.Juyn                                * */
/* *             - B597134 - libmng pollutes the linker namespace           * */
/* *             1.0.5 - 09/15/2002 - G.Juyn                                * */
/* *             - fixed LOOP iteration=0 special case                      * */
/* *             1.0.5 - 10/07/2002 - G.Juyn                                * */
/* *             - added another fix for misplaced TERM chunk               * */
/* *             - completed support for condition=2 in TERM chunk          * */
/* *             - added beta version function & constant                   * */
/* *             1.0.5 - 10/11/2002 - G.Juyn                                * */
/* *             - added mng_status_dynamic to supports function            * */
/* *             1.0.5 - 11/04/2002 - G.Juyn                                * */
/* *             - changed FRAMECOUNT/LAYERCOUNT/PLAYTIME error to warning  * */
/* *             1.0.5 - 11/07/2002 - G.Juyn                                * */
/* *             - added support to get totals after mng_read()             * */
/* *             1.0.5 - 11/29/2002 - G.Juyn                                * */
/* *             - fixed goxxxxx() support for zero values                  * */
/* *                                                                        * */
/* *             1.0.6 - 05/25/2003 - G.R-P                                 * */
/* *             - added MNG_SKIPCHUNK_cHNK footprint optimizations         * */
/* *             1.0.6 - 07/11/2003 - G.R-P                                 * */
/* *             - added conditionals zlib and jpeg property accessors      * */
/* *             1.0.6 - 07/14/2003 - G.R-P                                 * */
/* *             - added conditionals around "mng_display_go*" and other    * */
/* *               unused functions                                         * */
/* *             1.0.6 - 07/29/2003 - G.R-P                                 * */
/* *             - added conditionals around PAST chunk support             * */
/* *                                                                        * */
/* *             1.0.7 - 03/07/2004 - G. Randers-Pehrson                    * */
/* *             - put gamma, cms-related declarations inside #ifdef        * */
/* *             1.0.7 - 03/10/2004 - G.R-P                                 * */
/* *             - added conditionals around openstream/closestream         * */
/* *             1.0.7 - 03/24/2004 - G.R-P                                 * */
/* *             - fixed zTXT -> zTXt typo                                  * */
/* *                                                                        * */
/* *             1.0.8 - 04/02/2004 - G.Juyn                                * */
/* *             - added CRC existence & checking flags                     * */
/* *             1.0.8 - 04/10/2004 - G.Juyn                                * */
/* *             - added data-push mechanisms for specialized decoders      * */
/* *             1.0.8 - 07/06/2004 - G.R-P                                 * */
/* *             - defend against using undefined openstream function       * */
/* *             1.0.8 - 08/02/2004 - G.Juyn                                * */
/* *             - added conditional to allow easier writing of large MNG's * */
/* *                                                                        * */
/* *             1.0.9 - 08/17/2004 - G.R-P                                 * */
/* *             - added more SKIPCHUNK conditionals                        * */
/* *             1.0.9 - 09/25/2004 - G.Juyn                                * */
/* *             - replaced MNG_TWEAK_LARGE_FILES with permanent solution   * */
/* *             1.0.9 - 10/03/2004 - G.Juyn                                * */
/* *             - added function to retrieve current FRAM delay            * */
/* *             1.0.9 - 12/20/2004 - G.Juyn                                * */
/* *             - cleaned up macro-invocations (thanks to D. Airlie)       * */
/* *                                                                        * */
/* *             1.0.10 - 07/06/2005 - G.R-P                                * */
/* *             - added more SKIPCHUNK conditionals                        * */
/* *             1.0.10 - 04/08/2007 - G.Juyn                               * */
/* *             - added support for mPNG proposal                          * */
/* *             1.0.10 - 04/12/2007 - G.Juyn                               * */
/* *             - added support for ANG proposal                           * */
/* *             1.0.10 - 07/06/2007 - G.R-P bugfix by Lucas Quintana       * */
/* *                                                                        * */
/* ************************************************************************** */

#include "libmng.h"
#include "libmng_data.h"
#include "libmng_error.h"
#include "libmng_trace.h"
#ifdef __BORLANDC__
#pragma hdrstop
#endif
#include "libmng_objects.h"
#include "libmng_object_prc.h"
#include "libmng_chunks.h"
#include "libmng_memory.h"
#include "libmng_read.h"
#include "libmng_write.h"
#include "libmng_display.h"
#include "libmng_zlib.h"
#include "libmng_jpeg.h"
#include "libmng_cms.h"
#include "libmng_pixels.h"

#if defined(__BORLANDC__) && defined(MNG_STRICT_ANSI)
#pragma option -A                      /* force ANSI-C */
#endif

/* ************************************************************************** */
/* *                                                                        * */
/* * local routines                                                         * */
/* *                                                                        * */
/* ************************************************************************** */

#ifdef MNG_SUPPORT_DISPLAY
MNG_LOCAL mng_retcode mng_drop_objects (mng_datap pData,
                                        mng_bool  bDropaniobj)
{
  mng_objectp       pObject;
  mng_objectp       pNext;
  mng_cleanupobject fCleanup;

#ifdef MNG_SUPPORT_TRACE
  MNG_TRACE (pData, MNG_FN_DROP_OBJECTS, MNG_LC_START);
#endif

  pObject = pData->pFirstimgobj;       /* get first stored image-object (if any) */

  while (pObject)                      /* more objects to discard ? */
  {
    pNext = ((mng_object_headerp)pObject)->pNext;
                                       /* call appropriate cleanup */
    fCleanup = ((mng_object_headerp)pObject)->fCleanup;
    fCleanup (pData, pObject);

    pObject = pNext;                   /* neeeext */
  }

  pData->pFirstimgobj = MNG_NULL;      /* clean this up!!! */
  pData->pLastimgobj  = MNG_NULL;

  if (bDropaniobj)                     /* drop animation objects ? */
  {
    pObject = pData->pFirstaniobj;     /* get first stored animation-object (if any) */

    while (pObject)                    /* more objects to discard ? */
    {
      pNext = ((mng_object_headerp)pObject)->pNext;
                                       /* call appropriate cleanup */
      fCleanup = ((mng_object_headerp)pObject)->fCleanup;
      fCleanup (pData, pObject);

      pObject = pNext;                 /* neeeext */
    }

    pData->pFirstaniobj = MNG_NULL;    /* clean this up!!! */
    pData->pLastaniobj  = MNG_NULL;

#ifdef MNG_SUPPORT_DYNAMICMNG
    pObject = pData->pFirstevent;      /* get first event-object (if any) */

    while (pObject)                    /* more objects to discard ? */
    {
      pNext = ((mng_object_headerp)pObject)->pNext;
                                       /* call appropriate cleanup */
      fCleanup = ((mng_object_headerp)pObject)->fCleanup;
      fCleanup (pData, pObject);

      pObject = pNext;                 /* neeeext */
    }

    pData->pFirstevent = MNG_NULL;     /* clean this up!!! */
    pData->pLastevent  = MNG_NULL;
#endif
  }

#ifdef MNG_INCLUDE_MPNG_PROPOSAL
  if (pData->pMPNG)                    /* drop MPNG data (if any) */
  {
    fCleanup = ((mng_object_headerp)pData->pMPNG)->fCleanup;
    fCleanup (pData, pData->pMPNG);
    pData->pMPNG = MNG_NULL;
  }
#endif

#ifdef MNG_INCLUDE_ANG_PROPOSAL
  if (pData->pANG)                     /* drop ANG data (if any) */
  {
    fCleanup = ((mng_object_headerp)pData->pANG)->fCleanup;
    fCleanup (pData, pData->pANG);
    pData->pANG = MNG_NULL;
  }
#endif

#ifdef MNG_SUPPORT_TRACE
  MNG_TRACE (pData, MNG_FN_DROP_OBJECTS, MNG_LC_END);
#endif

  return MNG_NOERROR;
}
#endif /* MNG_SUPPORT_DISPLAY */

/* ************************************************************************** */

#ifdef MNG_SUPPORT_DISPLAY
#ifndef MNG_SKIPCHUNK_SAVE
MNG_LOCAL mng_retcode mng_drop_savedata (mng_datap pData)
{
#ifdef MNG_SUPPORT_TRACE
  MNG_TRACE (pData, MNG_FN_DROP_SAVEDATA, MNG_LC_START);
#endif

  if (pData->pSavedata)                /* sanity check */
  {                                    /* address it more directly */
    mng_savedatap pSave = pData->pSavedata;

    if (pSave->iGlobalProfilesize)     /* cleanup the profile ? */
      MNG_FREEX (pData, pSave->pGlobalProfile, pSave->iGlobalProfilesize);
                                       /* cleanup the save structure */
    MNG_FREE (pData, pData->pSavedata, sizeof (mng_savedata));
  }

#ifdef MNG_SUPPORT_TRACE
  MNG_TRACE (pData, MNG_FN_DROP_SAVEDATA, MNG_LC_END);
#endif

  return MNG_NOERROR;
}
#endif
#endif /* MNG_SUPPORT_DISPLAY */

/* ************************************************************************** */

#ifdef MNG_SUPPORT_DISPLAY
MNG_LOCAL mng_retcode mng_reset_rundata (mng_datap pData)
{
  mng_drop_invalid_objects (pData);    /* drop invalidly stored objects */
#ifndef MNG_SKIPCHUNK_SAVE
  mng_drop_savedata        (pData);    /* drop stored savedata */
#endif
  mng_reset_objzero        (pData);    /* reset object 0 */
                                       /* drop stored objects (if any) */
  mng_drop_objects         (pData, MNG_FALSE);

  pData->bFramedone            = MNG_FALSE;
  pData->iFrameseq             = 0;    /* reset counters & stuff */
  pData->iLayerseq             = 0;
  pData->iFrametime            = 0;

  pData->bSkipping             = MNG_FALSE;

#ifdef MNG_SUPPORT_DYNAMICMNG
  pData->bRunningevent         = MNG_FALSE;
  pData->bStopafterseek        = MNG_FALSE;
  pData->iEventx               = 0;
  pData->iEventy               = 0;
  pData->pLastmousemove        = MNG_NULL;
#endif

  pData->iRequestframe         = 0;
  pData->iRequestlayer         = 0;
  pData->iRequesttime          = 0;
  pData->bSearching            = MNG_FALSE;

  pData->iRuntime              = 0;
  pData->iSynctime             = 0;
  pData->iStarttime            = 0;
  pData->iEndtime              = 0;
  pData->bRunning              = MNG_FALSE;
  pData->bTimerset             = MNG_FALSE;
  pData->iBreakpoint           = 0;
  pData->bSectionwait          = MNG_FALSE;
  pData->bFreezing             = MNG_FALSE;
  pData->bResetting            = MNG_FALSE;
  pData->bNeedrefresh          = MNG_FALSE;
  pData->bOnlyfirstframe       = MNG_FALSE;
  pData->iFramesafterTERM      = 0;

  pData->iIterations           = 0;
                                       /* start of animation objects! */
  pData->pCurraniobj           = MNG_NULL;

  pData->iUpdateleft           = 0;    /* reset region */
  pData->iUpdateright          = 0;
  pData->iUpdatetop            = 0;
  pData->iUpdatebottom         = 0;
  pData->iPLTEcount            = 0;    /* reset PLTE data */

#ifndef MNG_SKIPCHUNK_DEFI
  pData->iDEFIobjectid         = 0;    /* reset DEFI data */
  pData->bDEFIhasdonotshow     = MNG_FALSE;
  pData->iDEFIdonotshow        = 0;
  pData->bDEFIhasconcrete      = MNG_FALSE;
  pData->iDEFIconcrete         = 0;
  pData->bDEFIhasloca          = MNG_FALSE;
  pData->iDEFIlocax            = 0;
  pData->iDEFIlocay            = 0;
  pData->bDEFIhasclip          = MNG_FALSE;
  pData->iDEFIclipl            = 0;
  pData->iDEFIclipr            = 0;
  pData->iDEFIclipt            = 0;
  pData->iDEFIclipb            = 0;
#endif

#ifndef MNG_SKIPCHUNK_BACK
  pData->iBACKred              = 0;    /* reset BACK data */
  pData->iBACKgreen            = 0;
  pData->iBACKblue             = 0;
  pData->iBACKmandatory        = 0;
  pData->iBACKimageid          = 0;
  pData->iBACKtile             = 0;
#endif

#ifndef MNG_SKIPCHUNK_FRAM
  pData->iFRAMmode             = 1;     /* default global FRAM variables */
  pData->iFRAMdelay            = 1;
  pData->iFRAMtimeout          = 0x7fffffffl;
  pData->bFRAMclipping         = MNG_FALSE;
  pData->iFRAMclipl            = 0;
  pData->iFRAMclipr            = 0;
  pData->iFRAMclipt            = 0;
  pData->iFRAMclipb            = 0;

  pData->iFramemode            = 1;     /* again for the current frame */
  pData->iFramedelay           = 1;
  pData->iFrametimeout         = 0x7fffffffl;
  pData->bFrameclipping        = MNG_FALSE;
  pData->iFrameclipl           = 0;
  pData->iFrameclipr           = 0;
  pData->iFrameclipt           = 0;
  pData->iFrameclipb           = 0;

  pData->iNextdelay            = 1;
#endif

#ifndef MNG_SKIPCHUNK_SHOW
  pData->iSHOWmode             = 0;    /* reset SHOW data */
  pData->iSHOWfromid           = 0;
  pData->iSHOWtoid             = 0;
  pData->iSHOWnextid           = 0;
  pData->iSHOWskip             = 0;
#endif

  pData->iGlobalPLTEcount      = 0;    /* reset global PLTE data */

  pData->iGlobalTRNSrawlen     = 0;    /* reset global tRNS data */

  pData->iGlobalGamma          = 0;    /* reset global gAMA data */

#ifndef MNG_SKIPCHUNK_cHRM
  pData->iGlobalWhitepointx    = 0;    /* reset global cHRM data */
  pData->iGlobalWhitepointy    = 0;
  pData->iGlobalPrimaryredx    = 0;
  pData->iGlobalPrimaryredy    = 0;
  pData->iGlobalPrimarygreenx  = 0;
  pData->iGlobalPrimarygreeny  = 0;
  pData->iGlobalPrimarybluex   = 0;
  pData->iGlobalPrimarybluey   = 0;
#endif

#ifndef MNG_SKIPCHUNK_sRGB
  pData->iGlobalRendintent     = 0;    /* reset global sRGB data */
#endif

#ifndef MNG_SKIPCHUNK_iCCP
  if (pData->iGlobalProfilesize)       /* drop global profile (if any) */
    MNG_FREE (pData, pData->pGlobalProfile, pData->iGlobalProfilesize);

  pData->iGlobalProfilesize    = 0;    
#endif

#ifndef MNG_SKIPCHUNK_bKGD
  pData->iGlobalBKGDred        = 0;    /* reset global bKGD data */
  pData->iGlobalBKGDgreen      = 0;
  pData->iGlobalBKGDblue       = 0;
#endif
#ifndef MNG_NO_DELTA_PNG
                                       /* reset delta-image */
  pData->pDeltaImage           = MNG_NULL;
  pData->iDeltaImagetype       = 0;
  pData->iDeltatype            = 0;
  pData->iDeltaBlockwidth      = 0;
  pData->iDeltaBlockheight     = 0;
  pData->iDeltaBlockx          = 0;
  pData->iDeltaBlocky          = 0;
  pData->bDeltaimmediate       = MNG_FALSE;

  pData->fDeltagetrow          = MNG_NULL;
  pData->fDeltaaddrow          = MNG_NULL;
  pData->fDeltareplacerow      = MNG_NULL;
  pData->fDeltaputrow          = MNG_NULL;

  pData->fPromoterow           = MNG_NULL;
  pData->fPromBitdepth         = MNG_NULL;
  pData->pPromBuf              = MNG_NULL;
  pData->iPromColortype        = 0;
  pData->iPromBitdepth         = 0;
  pData->iPromFilltype         = 0;
  pData->iPromWidth            = 0;
  pData->pPromSrc              = MNG_NULL;
  pData->pPromDst              = MNG_NULL;
#endif

#ifndef MNG_SKIPCHUNK_MAGN
  pData->iMAGNfromid           = 0;
  pData->iMAGNtoid             = 0;
#endif

#ifndef MNG_SKIPCHUNK_PAST
  pData->iPastx                = 0;
  pData->iPasty                = 0;
#endif

  pData->pLastseek             = MNG_NULL;

  return MNG_NOERROR;
}
#endif /* MNG_SUPPORT_DISPLAY */

/* ************************************************************************** */

MNG_LOCAL void cleanup_errors (mng_datap pData)
{
  pData->iErrorcode = MNG_NOERROR;
  pData->iSeverity  = 0;
  pData->iErrorx1   = 0;
  pData->iErrorx2   = 0;
  pData->zErrortext = MNG_NULL;

  return;
}

/* ************************************************************************** */

#ifdef MNG_SUPPORT_READ
MNG_LOCAL mng_retcode make_pushbuffer (mng_datap       pData,
                                       mng_ptr         pPushdata,
                                       mng_size_t      iLength,
                                       mng_bool        bTakeownership,
                                       mng_pushdatap * pPush)
{
  mng_pushdatap pTemp;

  MNG_ALLOC (pData, pTemp, sizeof(mng_pushdata));

  pTemp->pNext      = MNG_NULL;

  if (bTakeownership)                  /* are we going to own the buffer? */
  {                                    /* then just copy the pointer */
    pTemp->pData    = (mng_uint8p)pPushdata;
  }
  else
  {                                    /* otherwise create new buffer */
    MNG_ALLOCX (pData, pTemp->pData, iLength);
    if (!pTemp->pData)                 /* succeeded? */
    {
      MNG_FREEX (pData, pTemp, sizeof(mng_pushdata));
      MNG_ERROR (pData, MNG_OUTOFMEMORY);
    }
                                       /* and copy the bytes across */
    MNG_COPY (pTemp->pData, pPushdata, iLength);
  }

  pTemp->iLength    = iLength;
  pTemp->bOwned     = bTakeownership;
  pTemp->pDatanext  = pTemp->pData;
  pTemp->iRemaining = iLength;

  *pPush            = pTemp;           /* return it */

  return MNG_NOERROR;                  /* and all's well */
}
#endif

#ifdef MNG_VERSION_QUERY_SUPPORT
/* ************************************************************************** */
/* *                                                                        * */
/* *  Versioning control                                                    * */
/* *                                                                        * */
/* ************************************************************************** */

mng_pchar MNG_DECL mng_version_text    (void)
{
  return MNG_VERSION_TEXT;
}

/* ************************************************************************** */

mng_uint8 MNG_DECL mng_version_so      (void)
{
  return MNG_VERSION_SO;
}

/* ************************************************************************** */

mng_uint8 MNG_DECL mng_version_dll     (void)
{
  return MNG_VERSION_DLL;
}

/* ************************************************************************** */

mng_uint8 MNG_DECL mng_version_major   (void)
{
  return MNG_VERSION_MAJOR;
}

/* ************************************************************************** */

mng_uint8 MNG_DECL mng_version_minor   (void)
{
  return MNG_VERSION_MINOR;
}

/* ************************************************************************** */

mng_uint8 MNG_DECL mng_version_release (void)
{
  return MNG_VERSION_RELEASE;
}

/* ************************************************************************** */

mng_bool MNG_DECL mng_version_beta (void)
{
  return MNG_VERSION_BETA;
}
#endif

/* ************************************************************************** */
/* *                                                                        * */
/* * 'supports' function                                                    * */
/* *                                                                        * */
/* ************************************************************************** */

#ifdef MNG_SUPPORT_FUNCQUERY
typedef struct {
                 mng_pchar  zFunction;
                 mng_uint8  iMajor;    /* Major == 0 means not implemented ! */ 
                 mng_uint8  iMinor;
                 mng_uint8  iRelease;
               } mng_func_entry;
typedef mng_func_entry const * mng_func_entryp;

MNG_LOCAL mng_func_entry const func_table [] =
  {                                    /* keep it alphabetically sorted !!!!! */
    {"mng_cleanup",                1, 0, 0},
    {"mng_copy_chunk",             1, 0, 5},
    {"mng_create",                 1, 0, 0},
    {"mng_display",                1, 0, 0},
    {"mng_display_freeze",         1, 0, 0},
#ifndef MNG_NO_DISPLAY_GO_SUPPORTED
    {"mng_display_goframe",        1, 0, 0},
    {"mng_display_golayer",        1, 0, 0},
    {"mng_display_gotime",         1, 0, 0},
#endif
    {"mng_display_reset",          1, 0, 0},
    {"mng_display_resume",         1, 0, 0},
    {"mng_get_alphabitdepth",      1, 0, 0},
    {"mng_get_alphacompression",   1, 0, 0},
    {"mng_get_alphadepth",         1, 0, 0},
    {"mng_get_alphafilter",        1, 0, 0},
    {"mng_get_alphainterlace",     1, 0, 0},
    {"mng_get_bgcolor",            1, 0, 0},
    {"mng_get_bitdepth",           1, 0, 0},
    {"mng_get_bkgdstyle",          1, 0, 0},
    {"mng_get_cacheplayback",      1, 0, 2},
    {"mng_get_canvasstyle",        1, 0, 0},
    {"mng_get_colortype",          1, 0, 0},
    {"mng_get_compression",        1, 0, 0},
#ifndef MNG_NO_CURRENT_INFO
    {"mng_get_currentframe",       1, 0, 0},
    {"mng_get_currentlayer",       1, 0, 0},
    {"mng_get_currentplaytime",    1, 0, 0},
#endif
    {"mng_get_currframdelay",      1, 0, 9},
#ifndef MNG_NO_DFLT_INFO
    {"mng_get_dfltimggamma",       1, 0, 0},
    {"mng_get_dfltimggammaint",    1, 0, 0},
#endif
    {"mng_get_displaygamma",       1, 0, 0},
    {"mng_get_displaygammaint",    1, 0, 0},
    {"mng_get_doprogressive",      1, 0, 2},
    {"mng_get_filter",             1, 0, 0},
    {"mng_get_framecount",         1, 0, 0},
    {"mng_get_imageheight",        1, 0, 0},
    {"mng_get_imagelevel",         1, 0, 0},
    {"mng_get_imagetype",          1, 0, 0},
    {"mng_get_imagewidth",         1, 0, 0},
    {"mng_get_interlace",          1, 0, 0},
#ifdef MNG_ACCESS_JPEG
    {"mng_get_jpeg_dctmethod",     1, 0, 0},
    {"mng_get_jpeg_maxjdat",       1, 0, 0},
    {"mng_get_jpeg_optimized",     1, 0, 0},
    {"mng_get_jpeg_progressive",   1, 0, 0},
    {"mng_get_jpeg_quality",       1, 0, 0},
    {"mng_get_jpeg_smoothing",     1, 0, 0},
#endif
    {"mng_get_lastbackchunk",      1, 0, 3},
    {"mng_get_lastseekname",       1, 0, 5},
    {"mng_get_layercount",         1, 0, 0},
#ifndef MNG_SKIP_MAXCANVAS
    {"mng_get_maxcanvasheight",    1, 0, 0},
    {"mng_get_maxcanvaswidth",     1, 0, 0},
#endif
    {"mng_get_playtime",           1, 0, 0},
    {"mng_get_refreshpass",        1, 0, 0},
    {"mng_get_runtime",            1, 0, 0},
    {"mng_get_sectionbreaks",      1, 0, 0},
    {"mng_get_sigtype",            1, 0, 0},
    {"mng_get_simplicity",         1, 0, 0},
    {"mng_get_speed",              1, 0, 0},
    {"mng_get_srgb",               1, 0, 0},
    {"mng_get_starttime",          1, 0, 0},
    {"mng_get_storechunks",        1, 0, 0},
    {"mng_get_suspensionmode",     1, 0, 0},
    {"mng_get_ticks",              1, 0, 0},
#ifndef MNG_NO_CURRENT_INFO
    {"mng_get_totalframes",        1, 0, 5},
    {"mng_get_totallayers",        1, 0, 5},
    {"mng_get_totalplaytime",      1, 0, 5},
#endif
    {"mng_get_usebkgd",            1, 0, 0},
    {"mng_get_userdata",           1, 0, 0},
#if defined(MNG_FULL_CMS) || defined(MNG_GAMMA_ONLY) || defined(MNG_APP_CMS)
    {"mng_get_viewgamma",          1, 0, 0},
    {"mng_get_viewgammaint",       1, 0, 0},
#endif
#ifdef MNG_ACCESS_ZLIB
    {"mng_get_zlib_level",         1, 0, 0},
    {"mng_get_zlib_maxidat",       1, 0, 0},
    {"mng_get_zlib_memlevel",      1, 0, 0},
    {"mng_get_zlib_method",        1, 0, 0},
    {"mng_get_zlib_strategy",      1, 0, 0},
    {"mng_get_zlib_windowbits",    1, 0, 0},
#endif
#ifndef MNG_NO_OPEN_CLOSE_STREAM
    {"mng_getcb_closestream",      1, 0, 0},
#endif
    {"mng_getcb_errorproc",        1, 0, 0},
    {"mng_getcb_getalphaline",     1, 0, 0},
    {"mng_getcb_getbkgdline",      1, 0, 0},
    {"mng_getcb_getcanvasline",    1, 0, 0},
    {"mng_getcb_gettickcount",     1, 0, 0},
    {"mng_getcb_memalloc",         1, 0, 0},
    {"mng_getcb_memfree",          1, 0, 0},
#ifndef MNG_NO_OPEN_CLOSE_STREAM
    {"mng_getcb_openstream",       1, 0, 0},
#endif
    {"mng_getcb_processarow",      1, 0, 0},
    {"mng_getcb_processchroma",    1, 0, 0},
    {"mng_getcb_processgamma",     1, 0, 0},
    {"mng_getcb_processheader",    1, 0, 0},
    {"mng_getcb_processiccp",      1, 0, 0},
    {"mng_getcb_processmend",      1, 0, 1},
    {"mng_getcb_processneed",      1, 0, 0},
    {"mng_getcb_processsave",      1, 0, 0},
    {"mng_getcb_processseek",      1, 0, 0},
    {"mng_getcb_processsrgb",      1, 0, 0},
    {"mng_getcb_processterm",      1, 0, 2},
    {"mng_getcb_processtext",      1, 0, 0},
    {"mng_getcb_processunknown",   1, 0, 0},
    {"mng_getcb_readdata",         1, 0, 0},
    {"mng_getcb_refresh",          1, 0, 0},
    {"mng_getcb_releasedata",      1, 0, 8},
    {"mng_getcb_settimer",         1, 0, 0},
    {"mng_getcb_traceproc",        1, 0, 0},
    {"mng_getcb_writedata",        1, 0, 0},
    {"mng_getchunk_back",          1, 0, 0},
    {"mng_getchunk_basi",          1, 0, 0},
#ifndef MNG_SKIPCHUNK_bKGD
    {"mng_getchunk_bkgd",          1, 0, 0},
#endif
#ifndef MNG_SKIPCHUNK_cHRM
    {"mng_getchunk_chrm",          1, 0, 0},
#endif
    {"mng_getchunk_clip",          1, 0, 0},
    {"mng_getchunk_clon",          1, 0, 0},
#ifndef MNG_NO_DELTA_PNG
#ifndef MNG_SKIPCHUNK_dBYK
    {"mng_getchunk_dbyk",          1, 0, 0},
#endif
#endif
    {"mng_getchunk_defi",          1, 0, 0},
#ifndef MNG_NO_DELTA_PNG
    {"mng_getchunk_dhdr",          1, 0, 0},
#endif
    {"mng_getchunk_disc",          1, 0, 0},
#ifndef MNG_NO_DELTA_PNG
    {"mng_getchunk_drop",          1, 0, 0},
#endif
    {"mng_getchunk_endl",          1, 0, 0},
#ifdef MNG_INCLUDE_MPNG_PROPOSAL
    {"mng_getchunk_mpng",          1, 0, 10},
    {"mng_getchunk_mpng_frame",    1, 0, 10},
#endif
#ifndef MNG_SKIPCHUNK_evNT
    {"mng_getchunk_evnt",          1, 0, 5},
    {"mng_getchunk_evnt_entry",    1, 0, 5},
#endif
#ifndef MNG_SKIPCHUNK_eXPI
    {"mng_getchunk_expi",          1, 0, 0},
#endif
#ifndef MNG_SKIPCHUNK_fPRI
    {"mng_getchunk_fpri",          1, 0, 0},
#endif
    {"mng_getchunk_fram",          1, 0, 0},
    {"mng_getchunk_gama",          1, 0, 0},
#ifndef MNG_SKIPCHUNK_hIST
    {"mng_getchunk_hist",          1, 0, 0},
#endif
#ifndef MNG_SKIPCHUNK_iCCP
    {"mng_getchunk_iccp",          1, 0, 0},
#endif
    {"mng_getchunk_idat",          1, 0, 0},
    {"mng_getchunk_iend",          1, 0, 0},
    {"mng_getchunk_ihdr",          1, 0, 0},
#ifndef MNG_NO_DELTA_PNG
#ifdef MNG_INCLUDE_JNG
    {"mng_getchunk_ijng",          1, 0, 0},
#endif
    {"mng_getchunk_ipng",          1, 0, 0},
#endif
#ifndef MNG_SKIPCHUNK_iTXt
    {"mng_getchunk_itxt",          1, 0, 0},
#endif
#ifdef MNG_INCLUDE_JNG
    {"mng_getchunk_jdaa",          1, 0, 0},
    {"mng_getchunk_jdat",          1, 0, 0},
    {"mng_getchunk_jhdr",          1, 0, 0},
    {"mng_getchunk_jsep",          1, 0, 0},
#endif
    {"mng_getchunk_loop",          1, 0, 0},
#ifndef MNG_SKIPCHUNK_MAGN
    {"mng_getchunk_magn",          1, 0, 0},
#endif
    {"mng_getchunk_mend",          1, 0, 0},
    {"mng_getchunk_mhdr",          1, 0, 0},
    {"mng_getchunk_move",          1, 0, 0},
#ifndef MNG_SKIPCHUNK_nEED
    {"mng_getchunk_need",          1, 0, 0},
#endif
#ifndef MNG_SKIPCHUNK_ORDR
#ifndef MNG_NO_DELTA_PNG
    {"mng_getchunk_ordr",          1, 0, 0},
    {"mng_getchunk_ordr_entry",    1, 0, 0},
#endif
#endif
#ifndef MNG_SKIPCHUNK_PAST
    {"mng_getchunk_past",          1, 0, 0},
    {"mng_getchunk_past_src",      1, 0, 0},
#endif
#ifndef MNG_SKIPCHUNK_pHYg
    {"mng_getchunk_phyg",          1, 0, 0},
#endif
#ifndef MNG_SKIPCHUNK_pHYs
    {"mng_getchunk_phys",          1, 0, 0},
#endif
#ifndef MNG_NO_DELTA_PNG
    {"mng_getchunk_plte",          1, 0, 0},
    {"mng_getchunk_pplt",          1, 0, 0},
    {"mng_getchunk_pplt_entry",    1, 0, 0},
    {"mng_getchunk_prom",          1, 0, 0},
#endif
#ifndef MNG_SKIPCHUNK_SAVE
    {"mng_getchunk_save",          1, 0, 0},
    {"mng_getchunk_save_entry",    1, 0, 0},
#endif
#ifndef MNG_SKIPCHUNK_sBIT
    {"mng_getchunk_sbit",          1, 0, 0},
#endif
#ifndef MNG_SKIPCHUNK_SEEK
    {"mng_getchunk_seek",          1, 0, 0},
#endif
    {"mng_getchunk_show",          1, 0, 0},
#ifndef MNG_SKIPCHUNK_sPLT
    {"mng_getchunk_splt",          1, 0, 0},
#endif
#ifndef MNG_SKIPCHUNK_sRGB
    {"mng_getchunk_srgb",          1, 0, 0},
#endif
    {"mng_getchunk_term",          1, 0, 0},
#ifndef MNG_SKIPCHUNK_tEXt
    {"mng_getchunk_text",          1, 0, 0},
#endif
#ifndef MNG_SKIPCHUNK_tIME
    {"mng_getchunk_time",          1, 0, 0},
#endif
    {"mng_getchunk_trns",          1, 0, 0},
    {"mng_getchunk_unkown",        1, 0, 0},
#ifndef MNG_SKIPCHUNK_zTXt
    {"mng_getchunk_ztxt",          1, 0, 0},
#endif
    {"mng_getimgdata_chunk",       0, 0, 0},
    {"mng_getimgdata_chunkseq",    0, 0, 0},
    {"mng_getimgdata_seq",         0, 0, 0},
    {"mng_getlasterror",           1, 0, 0},
    {"mng_initialize",             1, 0, 0},
    {"mng_iterate_chunks",         1, 0, 0},
    {"mng_putchunk_back",          1, 0, 0},
#ifndef MNG_SKIPCHUNK_BASI
    {"mng_putchunk_basi",          1, 0, 0},
#endif
#ifndef MNG_SKIPCHUNK_bKGD
    {"mng_putchunk_bkgd",          1, 0, 0},
#endif
#ifndef MNG_SKIPCHUNK_cHRM
    {"mng_putchunk_chrm",          1, 0, 0},
#endif
    {"mng_putchunk_clip",          1, 0, 0},
    {"mng_putchunk_clon",          1, 0, 0},
#ifndef MNG_NO_DELTA_PNG
#ifndef MNG_SKIPCHUNK_DBYK
    {"mng_putchunk_dbyk",          1, 0, 0},
#endif
#endif
    {"mng_putchunk_defi",          1, 0, 0},
#ifndef MNG_NO_DELTA_PNG
    {"mng_putchunk_dhdr",          1, 0, 0},
#endif
    {"mng_putchunk_disc",          1, 0, 0},
#ifndef MNG_NO_DELTA_PNG
    {"mng_putchunk_drop",          1, 0, 0},
#endif
    {"mng_putchunk_endl",          1, 0, 0},
#ifdef MNG_INCLUDE_MPNG_PROPOSAL
    {"mng_putchunk_mpng",          1, 0, 10},
    {"mng_putchunk_mpng_frame",    1, 0, 10},
#endif
#ifndef MNG_SKIPCHUNK_evNT
    {"mng_putchunk_evnt",          1, 0, 5},
    {"mng_putchunk_evnt_entry",    1, 0, 5},
#endif
#ifndef MNG_SKIPCHUNK_eXPI
    {"mng_putchunk_expi",          1, 0, 0},
#endif
#ifndef MNG_SKIPCHUNK_fPRI
    {"mng_putchunk_fpri",          1, 0, 0},
#endif
#ifndef MNG_SKIPCHUNK_FRAM
    {"mng_putchunk_fram",          1, 0, 0},
#endif
    {"mng_putchunk_gama",          1, 0, 0},
#ifndef MNG_SKIPCHUNK_hIST
    {"mng_putchunk_hist",          1, 0, 0},
#endif
#ifndef MNG_SKIPCHUNK_iCCP
    {"mng_putchunk_iccp",          1, 0, 0},
#endif
    {"mng_putchunk_idat",          1, 0, 0},
    {"mng_putchunk_iend",          1, 0, 0},
    {"mng_putchunk_ihdr",          1, 0, 0},
#ifndef MNG_NO_DELTA_PNG
#ifdef MNG_INCLUDE_JNG
    {"mng_putchunk_ijng",          1, 0, 0},
#endif
    {"mng_putchunk_ipng",          1, 0, 0},
#endif
#ifndef MNG_SKIPCHUNK_iTXt
    {"mng_putchunk_itxt",          1, 0, 0},
#endif
#ifdef MNG_INCLUDE_JNG
    {"mng_putchunk_jdaa",          1, 0, 0},
    {"mng_putchunk_jdat",          1, 0, 0},
    {"mng_putchunk_jhdr",          1, 0, 0},
    {"mng_putchunk_jsep",          1, 0, 0},
#endif
    {"mng_putchunk_loop",          1, 0, 0},
#ifndef MNG_SKIPCHUNK_MAGN
    {"mng_putchunk_magn",          1, 0, 0},
#endif
    {"mng_putchunk_mend",          1, 0, 0},
    {"mng_putchunk_mhdr",          1, 0, 0},
    {"mng_putchunk_move",          1, 0, 0},
#ifndef MNG_SKIPCHUNK_nEED
    {"mng_putchunk_need",          1, 0, 0},
#endif
#ifndef MNG_NO_DELTA_PNG
#ifndef MNG_SKIPCHUNK_ORDR
    {"mng_putchunk_ordr",          1, 0, 0},
    {"mng_putchunk_ordr_entry",    1, 0, 0},
#endif
#endif
#ifndef MNG_SKIPCHUNK_PAST
    {"mng_putchunk_past",          1, 0, 0},
    {"mng_putchunk_past_src",      1, 0, 0},
#endif
#ifndef MNG_SKIPCHUNK_pHYg
    {"mng_putchunk_phyg",          1, 0, 0},
#endif
#ifndef MNG_SKIPCHUNK_pHYs
    {"mng_putchunk_phys",          1, 0, 0},
#endif
#ifndef MNG_NO_DELTA_PNG
    {"mng_putchunk_plte",          1, 0, 0},
    {"mng_putchunk_pplt",          1, 0, 0},
    {"mng_putchunk_pplt_entry",    1, 0, 0},
    {"mng_putchunk_prom",          1, 0, 0},
#endif
#ifndef MNG_SKIPCHUNK_SAVE
    {"mng_putchunk_save",          1, 0, 0},
    {"mng_putchunk_save_entry",    1, 0, 0},
#endif
#ifndef MNG_SKIPCHUNK_sBIT
    {"mng_putchunk_sbit",          1, 0, 0},
#endif
#ifndef MNG_SKIPCHUNK_SEEK
    {"mng_putchunk_seek",          1, 0, 0},
#endif
    {"mng_putchunk_show",          1, 0, 0},
#ifndef MNG_SKIPCHUNK_sPLT
    {"mng_putchunk_splt",          1, 0, 0},
#endif
#ifndef MNG_SKIPCHUNK_sRGB
    {"mng_putchunk_srgb",          1, 0, 0},
#endif
    {"mng_putchunk_term",          1, 0, 0},
#ifndef MNG_SKIPCHUNK_tEXt
    {"mng_putchunk_text",          1, 0, 0},
#endif
#ifndef MNG_SKIPCHUNK_tIME
    {"mng_putchunk_time",          1, 0, 0},
#endif
    {"mng_putchunk_trns",          1, 0, 0},
    {"mng_putchunk_unkown",        1, 0, 0},
#ifndef MNG_SKIPCHUNK_zTXt
    {"mng_putchunk_ztxt",          1, 0, 0},
#endif
    {"mng_putimgdata_ihdr",        0, 0, 0},
    {"mng_putimgdata_jhdr",        0, 0, 0},
    {"mng_reset",                  1, 0, 0},
    {"mng_read",                   1, 0, 0},
    {"mng_read_pushchunk",         1, 0, 8},
    {"mng_read_pushdata",          1, 0, 8},
    {"mng_read_pushsig",           1, 0, 8},
    {"mng_read_resume",            1, 0, 0},
    {"mng_readdisplay",            1, 0, 0},
    {"mng_set_bgcolor",            1, 0, 0},
    {"mng_set_bkgdstyle",          1, 0, 0},
    {"mng_set_cacheplayback",      1, 0, 2},
    {"mng_set_canvasstyle",        1, 0, 0},
    {"mng_set_dfltimggamma",       1, 0, 0},
#ifndef MNG_NO_DFLT_INFO
    {"mng_set_dfltimggammaint",    1, 0, 0},
#endif
    {"mng_set_displaygamma",       1, 0, 0},
    {"mng_set_displaygammaint",    1, 0, 0},
    {"mng_set_doprogressive",      1, 0, 2},
#ifdef MNG_ACCESS_JPEG
    {"mng_set_jpeg_dctmethod",     1, 0, 0},
    {"mng_set_jpeg_maxjdat",       1, 0, 0},
    {"mng_set_jpeg_optimized",     1, 0, 0},
    {"mng_set_jpeg_progressive",   1, 0, 0},
    {"mng_set_jpeg_quality",       1, 0, 0},
    {"mng_set_jpeg_smoothing",     1, 0, 0},
#endif
#ifndef MNG_SKIP_MAXCANVAS
    {"mng_set_maxcanvasheight",    1, 0, 0},
    {"mng_set_maxcanvassize",      1, 0, 0},
    {"mng_set_maxcanvaswidth",     1, 0, 0},
#endif
    {"mng_set_outputprofile",      1, 0, 0},
    {"mng_set_outputprofile2",     1, 0, 0},
    {"mng_set_outputsrgb",         1, 0, 1},
    {"mng_set_sectionbreaks",      1, 0, 0},
    {"mng_set_speed",              1, 0, 0},
    {"mng_set_srgb",               1, 0, 0},
    {"mng_set_srgbimplicit",       1, 0, 1},
    {"mng_set_srgbprofile",        1, 0, 0},
    {"mng_set_srgbprofile2",       1, 0, 0},
    {"mng_set_storechunks",        1, 0, 0},
    {"mng_set_suspensionmode",     1, 0, 0},
    {"mng_set_usebkgd",            1, 0, 0},
    {"mng_set_userdata",           1, 0, 0},
#if defined(MNG_FULL_CMS) || defined(MNG_GAMMA_ONLY) || defined(MNG_APP_CMS)
    {"mng_set_viewgamma",          1, 0, 0},
    {"mng_set_viewgammaint",       1, 0, 0},
#endif
#ifdef MNG_ACCESS_ZLIB
    {"mng_set_zlib_level",         1, 0, 0},
    {"mng_set_zlib_maxidat",       1, 0, 0},
    {"mng_set_zlib_memlevel",      1, 0, 0},
    {"mng_set_zlib_method",        1, 0, 0},
    {"mng_set_zlib_strategy",      1, 0, 0},
    {"mng_set_zlib_windowbits",    1, 0, 0},
#endif
#ifndef MNG_NO_OPEN_CLOSE_STREAM
    {"mng_setcb_closestream",      1, 0, 0},
#endif
    {"mng_setcb_errorproc",        1, 0, 0},
    {"mng_setcb_getalphaline",     1, 0, 0},
    {"mng_setcb_getbkgdline",      1, 0, 0},
    {"mng_setcb_getcanvasline",    1, 0, 0},
    {"mng_setcb_gettickcount",     1, 0, 0},
    {"mng_setcb_memalloc",         1, 0, 0},
    {"mng_setcb_memfree",          1, 0, 0},
#ifndef MNG_NO_OPEN_CLOSE_STREAM
    {"mng_setcb_openstream",       1, 0, 0},
#endif
    {"mng_setcb_processarow",      1, 0, 0},
    {"mng_setcb_processchroma",    1, 0, 0},
    {"mng_setcb_processgamma",     1, 0, 0},
    {"mng_setcb_processheader",    1, 0, 0},
    {"mng_setcb_processiccp",      1, 0, 0},
    {"mng_setcb_processmend",      1, 0, 1},
    {"mng_setcb_processneed",      1, 0, 0},
    {"mng_setcb_processsave",      1, 0, 0},
    {"mng_setcb_processseek",      1, 0, 0},
    {"mng_setcb_processsrgb",      1, 0, 0},
    {"mng_setcb_processterm",      1, 0, 2},
    {"mng_setcb_processtext",      1, 0, 0},
    {"mng_setcb_processunknown",   1, 0, 0},
    {"mng_setcb_readdata",         1, 0, 0},
    {"mng_setcb_refresh",          1, 0, 0},
    {"mng_setcb_releasedata",      1, 0, 8},
    {"mng_setcb_settimer",         1, 0, 0},
    {"mng_setcb_traceproc",        1, 0, 0},
    {"mng_setcb_writedata",        1, 0, 0},
    {"mng_status_creating",        1, 0, 0},
    {"mng_status_displaying",      1, 0, 0},
    {"mng_status_dynamic",         1, 0, 5},
    {"mng_status_error",           1, 0, 0},
    {"mng_status_reading",         1, 0, 0},
    {"mng_status_running",         1, 0, 0},
    {"mng_status_runningevent",    1, 0, 5},
    {"mng_status_suspendbreak",    1, 0, 0},
    {"mng_status_timerbreak",      1, 0, 0},
    {"mng_status_writing",         1, 0, 0},
    {"mng_supports_func",          1, 0, 5},
    {"mng_trapevent",              1, 0, 5},
    {"mng_updatemngheader",        1, 0, 0},
    {"mng_updatemngsimplicity",    1, 0, 0},
    {"mng_version_beta",           1, 0, 5},
    {"mng_version_dll",            1, 0, 0},
    {"mng_version_major",          1, 0, 0},
    {"mng_version_minor",          1, 0, 0},
    {"mng_version_release",        1, 0, 0},
    {"mng_version_so",             1, 0, 0},
    {"mng_version_text",           1, 0, 0},
    {"mng_write",                  1, 0, 0},
  };

mng_bool MNG_DECL mng_supports_func (mng_pchar  zFunction,
                                     mng_uint8* iMajor,
                                     mng_uint8* iMinor,
                                     mng_uint8* iRelease)
{
  mng_int32       iTop, iLower, iUpper, iMiddle;
  mng_func_entryp pEntry;          /* pointer to found entry */
                                   /* determine max index of table */
  iTop = (sizeof (func_table) / sizeof (func_table [0])) - 1;

  iLower  = 0;                     /* initialize binary search */
  iMiddle = iTop >> 1;             /* start in the middle */
  iUpper  = iTop;
  pEntry  = 0;                     /* no goods yet! */

  do                               /* the binary search itself */
    {
      mng_int32 iRslt = strcmp(func_table [iMiddle].zFunction, zFunction);
      if (iRslt < 0)
        iLower = iMiddle + 1;
      else if (iRslt > 0)
        iUpper = iMiddle - 1;
      else
      {
        pEntry = &func_table [iMiddle];
        break;
      };

      iMiddle = (iLower + iUpper) >> 1;
    }
  while (iLower <= iUpper);

  if (pEntry)                      /* found it ? */
  {
    *iMajor   = pEntry->iMajor;
    *iMinor   = pEntry->iMinor;
    *iRelease = pEntry->iRelease;
    return MNG_TRUE;
  }
  else
  {
    *iMajor   = 0;
    *iMinor   = 0;
    *iRelease = 0;
    return MNG_FALSE;
  }
}
#endif

/* *****************************************************************…