/*

  Copyright 2009 Nathan Phillip Brink, Ethan Zonca, Matthew Orlando

  This file is a part of DistRen.

  DistRen is free software: you can redistribute it and/or modify

  it under the terms of the GNU Affero General Public License as published by

  the Free Software Foundation, either version 3 of the License, or

  (at your option) any later version.

  DistRen 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 Affero General Public License for more details.

  You should have received a copy of the GNU Affero General Public License

  along with DistRen.  If not, see <http://www.gnu.org/licenses/>.

*/

/* This file contains the code which both processes (renders) jobs as a slave, and the code which distributes frames to slaves after receiving them from the client portion of the codebase. */

#include "distrenjob.h"

#include "listen.h"

#include "slavefuncs.h"

#include "mysql.h"

#include "common/asprintf.h"

#include "common/execio.h"

#include "common/options.h"

#include "common/protocol.h"

#include <confuse.h>

#include <malloc.h>

#include <stdio.h>

#include <stdlib.h>

#include <string.h>

#include <sys/stat.h>

#include <sys/types.h>

#include <time.h>

#include <unistd.h>

#include <libxml/encoding.h>

#include <libxml/parser.h>

#include <libxml/tree.h>

#include <libxml/xmlmemory.h>

#include <libxml/xmlreader.h>

#include <libxml/xmlwriter.h>

/* ******************* Structs ************************ */

struct general_info

{

  struct distrenjob head;

  distrend_mysql_conn_t conn;

  struct distrend_config *config;

  struct

  {

    /** general_info.xml */

    char *geninfo;

  } files;

  int jobs_in_queue;

  unsigned int free_clients;

  unsigned int rendering_clients;

  unsigned int total_finished_jobs;

  unsigned int total_frames_rendered;

  unsigned int highest_jobnum;

  int hibernate;

  time_t timestamp;

  unsigned long total_render_power;

  unsigned long total_priority_pieces;

};

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

   Function Prototypes

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

/* ************General Functions************* */

// int xml_dump();

int distrend_do();

int start_data(struct general_info *general_info);

int mortition(struct general_info *geninfo, struct distrenjob *job);

// int restoreJobState(struct distrenjob *job);

// int prepare_distrenjob(struct general_info *geninfo, int type, char *name, char *submitter, int priority, int start_frame, int end_frame, int width, int height);

// int distrenjob_enqueue(struct general_info *geninfo, struct distrenjob *job);

// int find_jobframe_from_job(struct distrenjob *distrenjob_ptr, struct distrenjob **job, struct frameset **frame);

// int find_jobframe_new(struct general_info *geninfo, int rend_pwr, struct distrenjob **job, struct frameset **frame);

// int find_jobframe_again(struct general_info *geninfo, int jobnum, int rend_pwr, struct distrenjob **job, struct frameset **frame);

void frame_watchdog(struct distrenjob *distrenjob_head);

// struct distrenjob *distrenjob_get(struct distrenjob *head, jobnum_t jobnum);

// void distrenjob_remove(struct general_info *geninfo, struct distrenjob *bj);

int distrend_do_config(int argc, char *argv[], struct distrend_config **config);

int distrend_config_free(struct distrend_config *config);

/* **************XML Functions**************** */

void update_general_info(struct general_info *geninfo);

int import_general_info(struct general_info *general_info);

int restore_distrenjob(struct general_info *geninfo, struct distrenjob **distrenjob, jobnum_t jobnum);

int updateJobStatsXML(struct distrenjob *job);

int update_xml_joblist(struct general_info *geninfo);

int createQueueFromXML(struct general_info *geninfo);

int reCreateQueueFromXML(struct general_info *geninfo, xmlDocPtr doc, xmlNodePtr current);

/* **************Test Functions**************** */

int printFrameInfo(struct frameset *frame);

int printJob(struct distrenjob *job);

int printJobInfo(struct distrenjob *job);

int printAllJobnums(struct distrenjob *head);

int interactiveTest(int test, struct general_info general_info);

int job_getserialfilename(char **filename, struct general_info *geninfo, unsigned int jobnum, int createdir);

int distren_mkdir_recurse(char *dirname);

/* **************** Main ********************* */

int main(int argc, char *argv[])

{

  /* Parse arguments */

  int counter;

  int test = 0; /*< Interactive mode if 1 */

  struct general_info general_info;

  struct distrend_clientset *clients;

  enum clientstatus

  {

    CLIENTSTATUS_UNINITIALIZED = 0,

    CLIENTSTATUS_BUSY = 1,

    CLIENTSTATUS_IDLE = 2

  } clientstatus;

  xmlinit();

  for(counter = 0; counter < argc; counter ++)

    {

      if(strcmp(argv[counter], "-h") == 0)

      {

    	  fprintf(stderr, "Usage: distrend [option] \nStarts the distrend server\n\t-h\tshow this help\n\t-t\tlaunches queue testing interface \n");

	  return 2;

      }

      else if(strcmp(argv[counter], "-t") == 0)

      {

    	  fprintf(stderr, "Entering into test mode...\n\n");

    	  test = 1;

      }

    }

  if(distrend_do_config(argc, argv, &general_info.config))

    return 1;

  /** preset paths */

  _distren_asprintf(&general_info.files.geninfo, "%s/general_info.xml",

		    general_info.config->datadir);

  /* @QUERY: Obselete?

  if(start_data(&general_info))

    {

      fprintf(stderr, "%s:%d: start_data() failed\n", __FILE__, __LINE__);

      return 1;

    }

    */

  /** MySQL Connection */

  if(mysqlConnect(&general_info.conn))

    {

      fprintf(stderr, "%s:%d: mysqlConnect() failed\n", __FILE__, __LINE__);

      return 1;

    }

  /** pre-loaded jobs for testing */

  // prepare_distrenjob(&general_info, 1, "awesome", "LordOfWar", 8, 1, 100, 640, 480);

  // prepare_distrenjob(&general_info, 1, "hamburger", "ohnobinki", 3, 1, 50, 1280, 720);

  /** Execute test function */

  // interactiveTest(test, general_info);

  distrend_listen(general_info.config, &clients);

  int slaveKey = 0; // Remotio should set me on a per-slave basis

  /* Main Loop */

  while(!general_info.config->die)

    {

      int clientsays = 0; /*< temporary example variable, will be replaced when we can handle messages */

      distrend_accept(general_info.config, clients);

      /* Make the following code more event-driven */

      frame_watchdog(&general_info.head);

      struct frameset *frame;

      struct distrenjob *job;

      /* If the client is idle, must be modified for climbing through linked list of clients (client->clientnum) */

      if(clientstatus == CLIENTSTATUS_IDLE)

	{

	  int returnnum = find_jobframe(general_info.conn, slaveKey, job->jobnum, frame->num); // Finds a frame to render @FIXME: Slavenum :D

	  if(returnnum)

	    {

	      fprintf(stderr,"No frames are available to render at this time. Idling...\n");

	      sleep(10);

	    }

	  else

	    remotio_send_to_client(frame->num, job->jobnum); // Pseudo-sends data to client

	}

      /* If the client states that they finished the frame */

      	if(clientsays == DISTREN_REQUEST_DONEFRAME){

      	  clientstatus = CLIENTSTATUS_IDLE; // Sets the client back to idle

      	}

    }

  distrend_unlisten(general_info.config->listens, clients);

  distrend_config_free(general_info.config);

  xmlcleanup();

  /** free() paths */

  free(general_info.files.geninfo);

  mysqlDisconnect(general_info.conn);

  return 0;

}

/* ********************** Functions ************************* */

/** Dumps all data in RAM to an xml file (such as current jobs, etc) which is parsed by start_data. Remember to invoke this before shutting down! @TODO: Fill this stub*/

// @QUERY: Obselete function, get rid of me!

/*

int xml_dump()

{

  return 0;

}

*/

/**

   Performs command stored in a client's request. @TODO: Fill stub

*/

int distrend_do()

{

  return 0;

}

/** 

    Fill variables at startup from XML dumps or defaults

 */

// @QUERY: Obselete function, as data is stored in sql now.

/*

int start_data(struct general_info *general_info)

{

  struct stat buffer;

// defaults

  memset(&general_info->head, '\0', sizeof(struct distrenjob));

  general_info->head.priority = 0;

  general_info->jobs_in_queue = 0;

  general_info->free_clients = 0;

  general_info->rendering_clients = 0;

  general_info->total_finished_jobs = 0;

  general_info->total_frames_rendered = 0;

  general_info->highest_jobnum = 0;

  general_info->hibernate = 0;

  general_info->timestamp = 0;

  general_info->total_render_power = 0;

  general_info->total_priority_pieces = 0;

  fprintf(stderr, "Initialized default global and queue states\n");

  if(stat(general_info->files.geninfo, &buffer) == 0)

    {

      fprintf(stderr, "Previous state file found; loading ``%s'':\n", general_info->files.geninfo);

      fprintf(stderr, "Parsing XML files and restoring previous state...\n");

      if(import_general_info(general_info))

        fprintf(stderr, "FAILURE\n");

      fprintf(stderr, "Restoring queue...\n");

      if(createQueueFromXML(general_info))

        fprintf(stderr, "FAILURE\n");

      fprintf(stderr, "done\n");

    }

  return 0;

}

*/

/**

   checks to see if a job is actually done.

   - scans the folder of the job to make sure all output files are present

*/

// @QUERY: Needs some complex query work

/*

int mortition(struct general_info *geninfo, struct distrenjob *job)

{

  short int isJobDone;

  int counter;

  char *path_and_number;

  struct stat buffer;

  isJobDone = 1;

  for(counter = 0; counter < job->total_frames; counter++)

    {

      _distren_asprintf(&path_and_number, "%s/stor/job%d/out/%d.%s",

                        geninfo->config->datadir,

                        job->jobnum,

                        job->frameset[counter].num,

                        job->output_format);

      if(stat(path_and_number, &buffer) == -1)

        {

          //   missing frame found

          job->frameset[counter].status = FRAMESETSTATUS_UNASSIGNED;

          job->completed_frames--;

          geninfo->total_frames_rendered--;

          isJobDone = 0;

        }

      free(path_and_number);

    }

  if(isJobDone)

    {

    //   all frames were accounted for

      distrenjob_remove(geninfo, job);

      distrenjob_free(&job);

      update_xml_joblist(geninfo);

    }

  else

    //   if the job isn't done, have frame_finder() start from the first frame, allowing it to see the frames that are now unassigned

    job->prev_frame_index = -1;

  update_general_info(geninfo);

  return 0;

}

*/

/**

   scans the frames of a job to initialize a job after server

   @return 0 if the job is completely done and there are no missing frames,

           1 if missing frames are found.

*/

// @QUERY: Obselete with mysql job/frame storage

/*

int restoreJobState(struct distrenjob *job)

{

  short int isJobDone;

  int counter;

  char *path_and_number;

  struct stat buffer;

  isJobDone = 1;

  for(counter = 0; counter < job->total_frames; counter++)

    {

      _distren_asprintf(&path_and_number, "stor/job%d/out/%d.%s", job->jobnum, job->frameset[counter].num, job->output_format); //< @TODO this path is used in multiple places, construct/build/determine it in a central function

      if(stat(path_and_number, &buffer) == 0)

        {

          job->frameset[counter].status = FRAMESETSTATUS_ASSIGNED;

          job->completed_frames++;

        }

      else

        isJobDone = 0;

      free(path_and_number);

    }

  return !isJobDone;

}

*/

/**

   creates a structure from starting data, then calls another

   function to actually add that struct to the queue.

   Passed strings must be free()d by the caller.

*/

// @QUERY: Likely obselete, as jobs are submitted via the web

/*

int prepare_distrenjob(struct general_info *geninfo, int type, char *name, char *submitter, int priority, int start_frame, int end_frame, int width, int height)

{

  int counter;

  int counter2;

  int tmp;

  char *serialfile;

  struct distrenjob *distrenjob;

  tmp = distrenjob_new(&distrenjob);

  if(tmp)

    return 1;

  geninfo->highest_jobnum ++;

  distrenjob->jobnum = geninfo->highest_jobnum;

  distrenjob->type = 1;

  distrenjob->name = strdup(name);

  distrenjob->submitter = strdup(submitter);

  distrenjob->priority = priority;

  distrenjob->width = width;

  distrenjob->height = height;

  // sets the total number of frames in animation for status purposes

  distrenjob->total_frames = (end_frame - start_frame + 1);

  distrenjob->frameset = malloc(sizeof(struct frameset) * distrenjob->total_frames);

  if(!distrenjob->frameset)

    {

      distrenjob_free(&distrenjob);

      fprintf(stderr, "OOM\n");

      return 1;

    }

  // initialize frameset

  counter2 = start_frame;

  for(counter = 0; counter < distrenjob->total_frames; counter++)

    {

      distrenjob->frameset[counter].num = counter2;

      distrenjob->frameset[counter].status = FRAMESETSTATUS_UNASSIGNED;

      counter2 ++;

    }

  job_getserialfilename(&serialfile, geninfo, distrenjob->jobnum, 1);

//     add job to queue

  fprintf(stderr, "prepare_distrenjob(): attempting distrenjob_serialize(%d, \"%s\")\n",

          distrenjob->jobnum, serialfile);

  distrenjob_serialize(distrenjob, serialfile);

  free(serialfile);

  fprintf(stderr, "prepare_distrenjob(): attempting distrenjob_enqueue()\n");

  distrenjob_enqueue(geninfo, distrenjob);

  fprintf(stderr, "prepare_distrenjob(): attempting update_xml_joblist()\n");

  update_xml_joblist(geninfo);

  fprintf(stderr, "prepare_distrenjob(): attempting update_general_info()\n");

  update_general_info(geninfo);

  fprintf(stderr, "prepare_distrenjob(): attempting updateJobStatsXML()\n");

  updateJobStatsXML(distrenjob);

  return 0;

}

*/

/**

   Adds the job to the queue based on its priority.

   Updates geninfo->jobs_in_queue.

*/

// @QUERY: Likely obselete, enqueueing is done via web interface

/*

int distrenjob_enqueue(struct general_info *geninfo, struct distrenjob *job)

{

  struct distrenjob *prev_job;

  struct distrenjob *current_job;

  struct distrenjob *head;

  head = &geninfo->head;

  prev_job = head;

//     iterate through linked jobs

  for(current_job = head->next; current_job; current_job = current_job->next)

  {

    fprintf(stderr, "enqueue loop iteration\n");

    if(job->priority < current_job->priority)

      {

        //   if job's priority is less than current_job's priority, insert job

        //   keep in mind 1 is the highest priority given to jobs, head has a

        //   priority of zero so it will always be before other jobs

        prev_job->next = job;

        job->next = current_job;

        fprintf(stderr, "added job before jobname: ``%s''\n", current_job->name);

        geninfo->jobs_in_queue ++;

        return 0;

      }

    prev_job = current_job;

  }

  // if it has reached the end of the list, add job there

  prev_job->next = job;

  fprintf(stderr, "added job at end of queue\n");

  geninfo->jobs_in_queue ++;

  return 0;

}

*/

// @QUERY: Obselete?

/*

int find_jobframe_from_job(struct distrenjob *distrenjob_ptr, struct distrenjob **job, struct frameset **frame)

{

  unsigned int frame_counter;

  unsigned short int found;

  found = 0;

  for(frame_counter = (distrenjob_ptr->prev_frame_index + 1); frame_counter < distrenjob_ptr->total_frames; frame_counter ++)

  {

    if(distrenjob_ptr->frameset[frame_counter].status == FRAMESETSTATUS_UNASSIGNED) // jobframe found

      {

        found = 1;

                distrenjob_ptr->frameset[frame_counter].status = FRAMESETSTATUS_ASSIGNED;

                distrenjob_ptr->frameset[frame_counter].start_time = clock();

                distrenjob_ptr->assigned_frames++;

                distrenjob_ptr->prev_frame_index = frame_counter;

                updateJobStatsXML(distrenjob_ptr);

      }

    if(found)

      break;

  }

  if(!found)

    {

      fprintf(stderr, "No more frames in this job number %d", distrenjob_ptr->jobnum);

      distrenjob_ptr->prev_frame_index = frame_counter;

      return 1;

    }

  *job = distrenjob_ptr;

  *frame = &distrenjob_ptr->frameset[frame_counter];

  return 0;

}

*/

// find a frame to render when the job that the last frame was for no longer exists

// @QUERY: Obselete?

/*

int find_jobframe_new(struct general_info *geninfo, int rend_pwr, struct distrenjob **job, struct frameset **frame)

{

  if(geninfo->hibernate)

    return 1;

  float power_difference;

  float greatest_power_difference;

  unsigned short int found;

  struct distrenjob *job_to_render;

  struct distrenjob *distrenjob_ptr;

  greatest_power_difference = -10000;

  found = 0;

  // iterate through jobs from first to last

  for(distrenjob_ptr = geninfo->head.next;

      distrenjob_ptr && !distrenjob_ptr->hibernate;

      distrenjob_ptr = distrenjob_ptr->next)

  {

          if(distrenjob_ptr->prev_frame_index < (distrenjob_ptr->total_frames - 1))

          {

             //  Why is the number 11 found here again? --ohnobinki

                  power_difference = (((float)geninfo->total_render_power / (float)geninfo->total_priority_pieces) * ((float)distrenjob_ptr->priority));

                  power_difference = power_difference - (float)distrenjob_ptr->assigned_render_power;

                  fprintf(stderr, "job num %d\npower difference: %f\n", distrenjob_ptr->jobnum, power_difference);

                  if(power_difference > greatest_power_difference)

                  {

                          job_to_render = distrenjob_ptr;

                          greatest_power_difference = power_difference;

                          found = 1;

                  }

          }

  }

  if(!found)

    {

      fprintf(stderr, "No more jobs to render\n");

      return 1;

    }

  find_jobframe_from_job(job_to_render, job, frame);

  job_to_render->assigned_render_power = job_to_render->assigned_render_power + rend_pwr;

  return 0;

}

*/

// gets a frame to render from the same job that the previously rendered frame was from

// @QUERY: Obselete?

/*

int find_jobframe_again(struct general_info *geninfo, int jobnum, int rend_pwr, struct distrenjob **job, struct frameset **frame)

{

  if(geninfo->hibernate)

    return 1;

  short int found;

  struct distrenjob *distrenjob_ptr;

  distrenjob_ptr = distrenjob_get(&geninfo->head, jobnum);

  // if the job was not found or there are no frames left in the job...

  if(!distrenjob_ptr || distrenjob_ptr->prev_frame_index >= (distrenjob_ptr->total_frames - 1))

    {

      fprintf(stderr, "Job number %d has been finished, finding new job\n", jobnum);

      // if previous job isn't yet finished the render power of the slave is removed from it

      if(distrenjob_ptr)

          distrenjob_ptr->assigned_render_power = distrenjob_ptr->assigned_render_power - rend_pwr;

      return find_jobframe_new(geninfo, rend_pwr, job, frame);

    }

  found = 0;

  found = find_jobframe_from_job(distrenjob_ptr, job, frame);

  if(found)

          find_jobframe_new(geninfo, rend_pwr, job, frame);

  return 0;

}

*/

/** Checks for dead, latent, or stale slaves */

void frame_watchdog(struct distrenjob *distrenjob_head)

{

  struct distrenjob *distrenjob_ptr;

  unsigned int counter;

  for(distrenjob_ptr = distrenjob_head->next; distrenjob_ptr; distrenjob_ptr = distrenjob_ptr->next)

  /* iterate through jobs */

  {

    /* if the job has been started, checks by seeing if either to first or second frame has been started */

    if(distrenjob_ptr->frameset[0].status != FRAMESETSTATUS_UNASSIGNED || distrenjob_ptr->frameset[1].status != FRAMESETSTATUS_UNASSIGNED)

      /* iterate through all frames for this job: */

      for(counter = 0; counter < distrenjob_ptr->total_frames; counter ++)

            /*watchdog_forgiveness = seconds of forgiveness before frame is re-assigned: */

        if((distrenjob_ptr->frameset[counter].start_time + distrenjob_ptr->watchdog_forgiveness) < clock())

        {

            /*

            If frame is not completed within the number of seconds specified by watchdog_forgiveness

            Then change the frame status to unassigned

            */

            distrenjob_ptr->frameset[counter].status = FRAMESETSTATUS_UNASSIGNED;

            distrenjob_ptr->assigned_frames--;

        }

    updateJobStatsXML(distrenjob_ptr);

  }

}

/**

   Finds a distrenjob struct based on the jobnum

   @arg jobnum job number to search for

   @return NULL on job doesn't exist

 */

// @QUERY: Obselete

/*

struct distrenjob *distrenjob_get(struct distrenjob *head, jobnum_t jobnum)

{

  struct distrenjob *distrenjob_ptr;

   // The conditions of the for loop will leave distrenjob_ptr at NULL if the end of the list is reached. It will leave it pointing to the correct job if it is found.

  for(distrenjob_ptr = head;

      distrenjob_ptr

        && distrenjob_ptr->jobnum != jobnum;

      distrenjob_ptr = distrenjob_ptr->next);

  return distrenjob_ptr;

}

*/

/**

   Removes a distrenjob from the distrenjob linked list. It does not free the

   distrenjob, however. You should do that with distrenjob_free() from distrenjob.h.

   Updates geninfo->jobs_in_queue.

   @arg head pointer to the head of the linkedlist of distrenjobs

 */

// @QUERY: Obselete: removal done via web interface

/*

void distrenjob_remove(struct general_info *geninfo, struct distrenjob *bj)

{

  struct distrenjob *previous_distrenjob;

  for(previous_distrenjob = &geninfo->head;

      previous_distrenjob

        && previous_distrenjob->next != bj; //< stop on the distrenjob that comes before bj

      previous_distrenjob = previous_distrenjob->next)

    ;

    // This removes references to bj from the linked list. I.E., we now skip bj when iterating through the list

  previous_distrenjob->next = bj->next;

  geninfo->jobs_in_queue --;

}

*/

/* Grabs config info from confs */

int distrend_do_config(int argc, char *argv[], struct distrend_config **config)

{

  unsigned int counter;

  cfg_opt_t myopts_listen[] =

    {

      CFG_SIMPLE_STR("type", NULL),

      CFG_SIMPLE_STR("path", NULL),

      CFG_SIMPLE_INT("port", NULL),

      CFG_END()

    };

  cfg_opt_t myopts[] =

    {

      CFG_SEC("listen",  /* this must be imported into struct listens (which must still be declared) */

          myopts_listen,

          CFGF_MULTI),

      CFG_SIMPLE_STR("datadir", NULL),

      CFG_STR_LIST("render_types", NULL, CFGF_NONE),

      CFG_END()

    };

  cfg_t *cfg_listen;

  fprintf(stderr, "%s:%d: running config\n", __FILE__, __LINE__);

  *config = malloc(sizeof(struct distrend_config));

  myopts[1].simple_value = &(*config)->datadir;

  if(options_init(argc, argv, &(*config)->mycfg, myopts, "daemon", &(*config)->options))

    return 1;

  /**

     grab listen blocks:

   */

  (*config)->listens = malloc(sizeof(struct distrend_listen) * (cfg_size((*config)->mycfg, "listen") + 1));

  for(counter = 0; counter < cfg_size((*config)->mycfg, "listen"); counter ++)

    {

      cfg_listen = cfg_getnsec((*config)->mycfg, "listen", counter);

      (*config)->listens[counter].port = cfg_getint(cfg_listen, "port");

      (*config)->listens[counter].sock = -1;

    }

  memset(&(*config)->listens[counter], '\0', sizeof(struct distrend_listen));

  fprintf(stderr, "using %s as datadir\n", (*config)->datadir);

  return 0;

}

int distrend_config_free(struct distrend_config *config)

{

  options_free(config->options);

  free(config);

  return 0;

}

/* ************************** XML Functions ************************* */

// writes the general_info.xml file which is a copy of the general_info structure

// except that it doesn't hold free_clients and rendering_clients

void update_general_info(struct general_info *geninfo)

{

  xmlTextWriterPtr writer;

  char *tmp;

  writer = xmlNewTextWriterFilename(geninfo->files.geninfo, 0);

  xmlTextWriterStartDocument(writer, NULL, "utf-8", NULL);

  xmlTextWriterStartElement(writer, (xmlChar*)"general_info");

  _distren_asprintf(&tmp, "%d", geninfo->jobs_in_queue);

  xmlTextWriterWriteElement(writer, (xmlChar*)"jobs_in_queue", (xmlChar*)tmp);

  free(tmp);

  _distren_asprintf(&tmp, "%d", geninfo->total_finished_jobs);

  xmlTextWriterWriteElement(writer, (xmlChar*)"total_finished_jobs", (xmlChar*)tmp);

  free(tmp);

  _distren_asprintf(&tmp, "%d", geninfo->total_frames_rendered);

  xmlTextWriterWriteElement(writer, (xmlChar*)"total_frames_rendered", (xmlChar*)tmp);

  free(tmp);

  _distren_asprintf(&tmp, "%d", geninfo->highest_jobnum);

  xmlTextWriterWriteElement(writer, (xmlChar*)"highest_jobnum", (xmlChar*)tmp);

  free(tmp);

  xmlTextWriterEndDocument(writer);

  xmlFreeTextWriter(writer);

}

/**

   Reads general state information from general_info.xml

   into the general_info structure.

*/

int import_general_info(struct general_info *general_info)

{

  xmlDocPtr doc;

  xmlNodePtr cur;

  doc = xmlParseFile(general_info->files.geninfo);

  cur = xmlDocGetRootElement(doc);

  if (xmlStrcmp(cur->name, (xmlChar*)"general_info"))

    {

      fprintf(stderr, "xml document is wrong type");

      xmlFreeDoc(doc);

      return 1;

    }

  cur = cur->xmlChildrenNode;

  general_info->jobs_in_queue = atoi((char*)xmlNodeListGetString(doc, cur->xmlChildrenNode, 1));

  cur = cur->next;

  general_info->total_finished_jobs = atoi((char*)xmlNodeListGetString(doc, cur->xmlChildrenNode, 1));

  cur = cur->next;

  general_info->total_frames_rendered = atoi((char*)xmlNodeListGetString(doc, cur->xmlChildrenNode, 1));

  cur = cur->next;

  general_info->highest_jobnum = atoi((char*)xmlNodeListGetString(doc, cur->xmlChildrenNode, 1));

  general_info->hibernate = 0;

  general_info->free_clients = 0;

  general_info->rendering_clients = 0;

  general_info->timestamp = 0;

  general_info->total_render_power = 0;

  general_info->total_priority_pieces = 0;

  xmlFreeDoc(doc);

  return 0;

}

/**

   determines path to the distenjob XML file and

   calls distrenjob_unserialize()

 */

// @QUERY: Likely obselete (don't remove at request of ohnobinki)

int restore_distrenjob(struct general_info *geninfo, struct distrenjob **distrenjob, jobnum_t jobnum)

{

  int tmp;

  char *file_name;

  tmp = job_getserialfilename(&file_name, geninfo, jobnum, 0);

  if(tmp)

    return tmp;

  tmp = distrenjob_unserialize(distrenjob, file_name);

  if(tmp)

    fprintf(stderr, "failed to load job %d from ``%s''\n",

            jobnum, file_name);