server/src/common/kernel/reports.c

/* vi: set ts=2:
 *
 *	Eressea PB(E)M host Copyright (C) 1998-2003
 *      Christian Schlittchen (corwin@amber.kn-bremen.de)
 *      Katja Zedel (katze@felidae.kn-bremen.de)
 *      Henning Peters (faroul@beyond.kn-bremen.de)
 *      Enno Rehling (enno@eressea.de)
 *      Ingo Wilken (Ingo.Wilken@informatik.uni-oldenburg.de)
 *
 *  based on:
 *
 * Atlantis v1.0  13 September 1993 Copyright 1993 by Russell Wallace
 * Atlantis v1.7                    Copyright 1996 by Alex Schr<EFBFBD>der
 *
 * This program may not be used, modified or distributed without
 * prior permission by the authors of Eressea.
 * This program may not be sold or used commercially without prior written
 * permission from the authors.
 */
#include <config.h>
#include "eressea.h"
#include "reports.h"

/* kernel includes */
#include <kernel/alliance.h>
#include <kernel/border.h>
#include <kernel/building.h>
#include <kernel/curse.h>
#include <kernel/faction.h>
#include <kernel/group.h>
#include <kernel/item.h>
#include <kernel/karma.h>
#include <kernel/magic.h>
#include <kernel/message.h>
#include <kernel/move.h>
#include <kernel/order.h>
#include <kernel/plane.h>
#include <kernel/race.h>
#include <kernel/region.h>
#include <kernel/ship.h>
#include <kernel/skill.h>
#include <kernel/terrain.h>
#include <kernel/unit.h>

/* util includes */
#include <util/attrib.h>
#include <util/bsdstring.h>
#include <util/base36.h>
#include <util/functions.h>
#include <util/translation.h>
#include <util/goodies.h>
#include <util/lists.h>
#include <util/log.h>

/* libc includes */
#include <sys/stat.h>
#include <assert.h>
#include <errno.h>
#include <limits.h>
#include <string.h>
#include <stdlib.h>
#include <time.h>

/* attributes includes */
#include <attributes/follow.h>
#include <attributes/otherfaction.h>
#include <attributes/racename.h>
#include <attributes/viewrange.h>

boolean nocr = false;
boolean nonr = false;
boolean noreports = false;

const char * g_reportdir;
const char * visibility[] = {
  "none",
  "neighbour",
  "lighthouse",
  "travel",
  "far",
  "unit",
  "battle"
};

const char *coasts[MAXDIRECTIONS] =
{
	"coast::nw",
	"coast::ne",
	"coast::e",
	"coast::se",
	"coast::sw",
	"coast::w"
};

const char *
reportpath(void)
{
  static char zText[MAX_PATH];
  if (g_reportdir) return g_reportdir;
  return strcat(strcpy(zText, basepath()), "/reports");
}

static char *
groupid(const struct group * g, const struct faction * f)
{
	typedef char name[OBJECTIDSIZE + 1];
	static name idbuf[8];
	static int nextbuf = 0;
	char *buf = idbuf[(++nextbuf) % 8];
	sprintf(buf, "%s (%s)", g->name, factionid(f));
	return buf;
}

const char *
report_kampfstatus(const unit * u, const struct locale * lang)
{
	static char fsbuf[64];
	static const char * azstatus[] = {
		"status_aggressive", "status_front",
		"status_rear", "status_defensive",
		"status_avoid", "status_flee" };

	strlcpy(fsbuf, LOC(lang, azstatus[u->status]), sizeof(fsbuf));
	if (fval(u, UFL_NOAID)) {
		strcat(fsbuf, ", ");
		strcat(fsbuf, LOC(lang, "status_noaid"));
	}

	return fsbuf;
}

const char *
hp_status(const unit * u)
{
	double p = (double) ((double) u->hp / (double) (u->number * unit_max_hp(u)));

	if (p > 2.00) return mkname("damage", "critical");
	if (p > 1.50) return mkname("damage", "heavily");
	if (p < 0.50) return mkname("damage", "badly");
	if (p < 0.75) return mkname("damage", "wounded");
	if (p < 0.99) return mkname("damage", "exhausted");

	return NULL;
}

void
report_item(const unit * owner, const item * i, const faction * viewer, const char ** name, const char ** basename, int * number, boolean singular)
{
  assert(owner->number);
  if (owner->faction == viewer) {
    if (name) *name = locale_string(viewer->locale, resourcename(i->type->rtype, ((i->number!=1 && !singular)?GR_PLURAL:0)));
    if (basename) *basename = resourcename(i->type->rtype, 0);
    if (number) *number = i->number;
  } else if (i->type->rtype==r_silver) {
    int pp = i->number/owner->number;
    if (number) *number = 1;
    if (pp > 50000 && dragonrace(owner->race)) {
      if (name) *name = locale_string(viewer->locale, "dragonhoard");
      if (basename) *basename = "dragonhoard";
    } else if (pp > 5000) {
      if (name) *name = locale_string(viewer->locale, "moneychest");
      if (basename) *basename = "moneychest";
    } else if (pp > 500) {
      if (name) *name = locale_string(viewer->locale, "moneybag");
      if (basename) *basename = "moneybag";
    } else {
      if (number) *number = 0;
      if (name) *name = NULL;
      if (basename) *basename = NULL;
    }
  } else {
    if (name) *name = locale_string(viewer->locale, resourcename(i->type->rtype, NMF_APPEARANCE|((i->number!=1 && !singular)?GR_PLURAL:0)));
    if (basename) *basename = resourcename(i->type->rtype, NMF_APPEARANCE);
    if (number) {
      if (fval(i->type, ITF_HERB)) *number = 1;
      else *number = i->number;
    }
  }
}


int * nmrs = NULL;

int
update_nmrs(void)
{
  int i, newplayers =0;
  faction *f;
  int turn = global.data_turn;

  if (nmrs==NULL) nmrs = malloc(sizeof(int)*(NMRTimeout()+1));
  for (i = 0; i <= NMRTimeout(); ++i) {
    nmrs[i] = 0;
  }

  for (f = factions; f; f = f->next) {
    if (fval(f, FFL_ISNEW)) {
      ++newplayers;
    } else if (f->no != MONSTER_FACTION) {
      int nmr = turn-f->lastorders+1;
      if (nmr<0 || nmr>NMRTimeout()) {
        log_error(("faction %s has %d NMRS\n", factionid(f), nmr));
        nmr = max(0, nmr);
        nmr = min(nmr, NMRTimeout());
      }
      ++nmrs[nmr];
    }
  }
  return newplayers;
}

#define ORDERS_IN_NR 1
static size_t
buforder(char * bufp, size_t size, const order * ord, int mode)
{
  size_t tsize = 0;
  int bytes;

  bytes = (int)strlcpy(bufp, ", \"", size);
  tsize += bytes;
  if (wrptr(&bufp, &size, bytes)!=0) WARN_STATIC_BUFFER();
  if (mode<ORDERS_IN_NR) {
    char * cmd = getcommand(ord);
    bytes = (int)strlcpy(bufp, cmd, size);
    free(cmd);
  } else {
    bytes = (int)strlcpy(bufp, "...", size);
  }
  tsize += bytes;
  if (wrptr(&bufp, &size, bytes)!=0) WARN_STATIC_BUFFER();

  if (size>1) {
    *bufp++ ='\"';
    --size;
  } else {
    WARN_STATIC_BUFFER();
  }
  ++tsize;

  return tsize;
}

int
bufunit(const faction * f, const unit * u, int indent, int mode, char * buf, size_t size)
{
  int i, dh;
  int getarnt = fval(u, UFL_PARTEITARNUNG);
  const char *pzTmp, *str;
  building * b;
  boolean isbattle = (boolean)(mode == see_battle);
  int telepath_see = 0;
  attrib *a_fshidden = NULL;
  item * itm;
  item * show;
  faction *fv = visible_faction(f, u);
  char * bufp = buf;
  boolean itemcloak = false;
  static const curse_type * itemcloak_ct = 0;
  static boolean init = false;
  int bytes;

  if (!init) {
    init = true;
    itemcloak_ct = ct_find("itemcloak");
  }
  if (itemcloak_ct!=NULL) {
    itemcloak = curse_active(get_curse(u->attribs, itemcloak_ct));
  }

#ifdef KARMA_MODULE
  if (fspecial(u->faction, FS_HIDDEN)) {
    a_fshidden = a_find(u->attribs, &at_fshidden);
  }
  telepath_see = fspecial(f, FS_TELEPATHY);
#endif /* KARMA_MODULE */

  bytes = (int)strlcpy(bufp, unitname(u), size);
  if (wrptr(&bufp, &size, bytes)!=0) WARN_STATIC_BUFFER();

  if (!isbattle) {
    attrib *a_otherfaction = a_find(u->attribs, &at_otherfaction);
    if (u->faction == f) {
      if (fval(u, UFL_GROUP)) {
        attrib *a = a_find(u->attribs, &at_group);
        if (a) {
          group * g = (group*)a->data.v;
          bytes = (int)strlcpy(bufp, ", ", size);
          if (wrptr(&bufp, &size, bytes)!=0) WARN_STATIC_BUFFER();
          bytes = (int)strlcpy(bufp, groupid(g, f), size);
          if (wrptr(&bufp, &size, bytes)!=0) WARN_STATIC_BUFFER();
        }
      }
      if (getarnt) {
        bytes = (int)strlcpy(bufp, ", ", size);
        if (wrptr(&bufp, &size, bytes)!=0) WARN_STATIC_BUFFER();
        bytes = (int)strlcpy(bufp, LOC(f->locale, "anonymous"), size);
        if (wrptr(&bufp, &size, bytes)!=0) WARN_STATIC_BUFFER();
      } else if (a_otherfaction) {
        faction * otherfaction = get_otherfaction(a_otherfaction);
        if (otherfaction) {
          bytes = (int)strlcpy(bufp, ", ", size);
          if (wrptr(&bufp, &size, bytes)!=0) WARN_STATIC_BUFFER();
          bytes = (int)strlcpy(bufp, factionname(otherfaction), size);
          if (wrptr(&bufp, &size, bytes)!=0) WARN_STATIC_BUFFER();
        }
      }
    } else {
      if (getarnt) {
        bytes = (int)strlcpy(bufp, ", ", size);
        if (wrptr(&bufp, &size, bytes)!=0) WARN_STATIC_BUFFER();
        bytes = (int)strlcpy(bufp, LOC(f->locale, "anonymous"), size);
        if (wrptr(&bufp, &size, bytes)!=0) WARN_STATIC_BUFFER();
      } else {
        if (a_otherfaction && alliedunit(u, f, HELP_FSTEALTH)) {
          faction * f = get_otherfaction(a_otherfaction);
          bytes = snprintf(bufp, size, ", %s (%s)", factionname(f), factionname(u->faction));
          if (wrptr(&bufp, &size, bytes)!=0) WARN_STATIC_BUFFER();
        } else {
          bytes = (int)strlcpy(bufp, ", ", size);
          if (wrptr(&bufp, &size, bytes)!=0) WARN_STATIC_BUFFER();
          bytes = (int)strlcpy(bufp, factionname(fv), size);
          if (wrptr(&bufp, &size, bytes)!=0) WARN_STATIC_BUFFER();
        }
      }
    }
  }

  bytes = (int)strlcpy(bufp, ", ", size);
  if (wrptr(&bufp, &size, bytes)!=0) WARN_STATIC_BUFFER();

  if (u->faction != f && a_fshidden && a_fshidden->data.ca[0] == 1 && effskill(u, SK_STEALTH) >= 6) {
    bytes = (int)strlcpy(bufp, "? ", size);
  } else {
    bytes = snprintf(bufp, size, "%d ", u->number);
  }
  if (wrptr(&bufp, &size, bytes)!=0) WARN_STATIC_BUFFER();

  pzTmp = get_racename(u->attribs);
  if (pzTmp) {
    bytes = (int)strlcpy(bufp, pzTmp, size);
    if (wrptr(&bufp, &size, bytes)!=0) WARN_STATIC_BUFFER();
    if (u->faction==f && fval(u->race, RCF_SHAPESHIFTANY)) {
      bytes = (int)strlcpy(bufp, " (", size);
      if (wrptr(&bufp, &size, bytes)!=0) WARN_STATIC_BUFFER();
      bytes = (int)strlcpy(bufp, racename(f->locale, u, u->race), size);
      if (wrptr(&bufp, &size, bytes)!=0) WARN_STATIC_BUFFER();
      if (size>1) {
        strcpy(bufp++, ")");
        --size;
      }
    }
  } else {
    bytes = (int)strlcpy(bufp, racename(f->locale, u, u->irace), size);
    if (wrptr(&bufp, &size, bytes)!=0) WARN_STATIC_BUFFER();
    if (u->faction==f && u->irace!=u->race) {
      bytes = (int)strlcpy(bufp, " (", size);
      if (wrptr(&bufp, &size, bytes)!=0) WARN_STATIC_BUFFER();
      bytes = (int)strlcpy(bufp, racename(f->locale, u, u->race), size);
      if (wrptr(&bufp, &size, bytes)!=0) WARN_STATIC_BUFFER();
      if (size>1) {
        strcpy(bufp++, ")");
        --size;
      }
    }
  }

#ifdef HEROES
  if (fval(u, UFL_HERO) && (u->faction == f || omniscient(f))) {
    bytes = (int)strlcpy(bufp, ", ", size);
    if (wrptr(&bufp, &size, bytes)!=0) WARN_STATIC_BUFFER();
    bytes = (int)strlcpy(bufp, LOC(f->locale, "hero"), size);
    if (wrptr(&bufp, &size, bytes)!=0) WARN_STATIC_BUFFER();
  }
#endif
  /* status */

  if (u->number && (u->faction == f || telepath_see || isbattle)) {
    const char * c = locale_string(f->locale, hp_status(u));
    bytes = (int)strlcpy(bufp, ", ", size);
    if (wrptr(&bufp, &size, bytes)!=0) WARN_STATIC_BUFFER();
    bytes = (int)strlcpy(bufp, report_kampfstatus(u, f->locale), size);
    if (wrptr(&bufp, &size, bytes)!=0) WARN_STATIC_BUFFER();
    if (c || fval(u, UFL_HUNGER)) {
      bytes = (int)strlcpy(bufp, " (", size);
      if (wrptr(&bufp, &size, bytes)!=0) WARN_STATIC_BUFFER();
      if (c) {
        bytes = (int)strlcpy(bufp, c, size);
        if (wrptr(&bufp, &size, bytes)!=0) WARN_STATIC_BUFFER();
      }
      if (fval(u, UFL_HUNGER)) {
        if (c) bytes = (int)strlcpy(bufp, ", hungert", size);
        else bytes = (int)strlcpy(bufp, "hungert", size);
        if (wrptr(&bufp, &size, bytes)!=0) WARN_STATIC_BUFFER();
      }
      if (size>1) {
        strcpy(bufp++, ")");
        --size;
      }
    }
  }
  if (getguard(u)) {
    bytes = (int)strlcpy(bufp, ", ", size);
    if (wrptr(&bufp, &size, bytes)!=0) WARN_STATIC_BUFFER();
    bytes = (int)strlcpy(bufp, LOC(f->locale, "unit_guards"), size);
    if (wrptr(&bufp, &size, bytes)!=0) WARN_STATIC_BUFFER();
  }

  if ((b = usiege(u))!=NULL) {
    bytes = (int)strlcpy(bufp, ", belagert ", size);
    if (wrptr(&bufp, &size, bytes)!=0) WARN_STATIC_BUFFER();
    bytes = (int)strlcpy(bufp, buildingname(b), size);
    if (wrptr(&bufp, &size, bytes)!=0) WARN_STATIC_BUFFER();
  }

  dh = 0;
  if (u->faction == f || telepath_see) {
    skill * sv;
    for (sv = u->skills;sv!=u->skills+u->skill_size;++sv) {
      bytes = (int)spskill(bufp, size, f->locale, u, sv, &dh, 1);
      if (wrptr(&bufp, &size, bytes)!=0) WARN_STATIC_BUFFER();
    }
  }

  dh = 0;
  if (f == u->faction || telepath_see || omniscient(f)) {
    show = u->items;
  } else if (!itemcloak && mode >= see_unit && !(a_fshidden
    && a_fshidden->data.ca[1] == 1 && effskill(u, SK_STEALTH) >= 3)) 
  {
    show = NULL;
    for (itm=u->items;itm;itm=itm->next) {
      item * ishow;
      const char * ic;
      int in;
      report_item(u, itm, f, NULL, &ic, &in, false);
      if (ic && *ic && in>0) {
        for (ishow = show; ishow; ishow=ishow->next) {
          const char * sc;
          int sn;
          if (ishow->type==itm->type) sc=ic;
          else report_item(u, ishow, f, NULL, &sc, &sn, false);
          if (sc==ic || strcmp(sc, ic)==0) {
            ishow->number+=itm->number;
            break;
          }
        }
        if (ishow==NULL) {
          ishow = i_add(&show, i_new(itm->type, itm->number));
        }
      }
    }
  } else {
    show = NULL;
  }
  for (itm=show; itm; itm=itm->next) {
    const char * ic;
    int in, bytes;
    report_item(u, itm, f, &ic, NULL, &in, false);
    if (in==0 || ic==NULL) continue;
    bytes = (int)strlcpy(bufp, ", ", size);
    if (wrptr(&bufp, &size, bytes)!=0) WARN_STATIC_BUFFER();

    if (!dh) {
      bytes = snprintf(bufp, size, "%s: ", LOC(f->locale, "nr_inventory"));
      if (wrptr(&bufp, &size, bytes)!=0) WARN_STATIC_BUFFER();
      dh = 1;
    }
    if (in == 1) {
      bytes = (int)strlcpy(bufp, ic, size);
    } else {
      bytes = snprintf(bufp, size, "%d %s", in, ic);
    }
    if (wrptr(&bufp, &size, bytes)!=0) WARN_STATIC_BUFFER();
  }
  if (show!=u->items) while (show) i_free(i_remove(&show, show));

  if (u->faction == f || telepath_see) {
    sc_mage * m = get_mage(u);

    if (m!=NULL) {
      spell_list *slist = m->spells;
      int t = effskill(u, SK_MAGIC);
      int bytes = snprintf(bufp, size, ". Aura %d/%d", get_spellpoints(u), max_spellpoints(u->region,u));
      if (bytes && wrptr(&bufp, &size, bytes)!=0) WARN_STATIC_BUFFER();

      for (dh=0; slist; slist=slist->next) {
        spell * sp = slist->data;
        if (sp->level > t) continue;
        if (!dh) {
          bytes = snprintf(bufp, size, ", %s: ", LOC(f->locale, "nr_spells"));
          dh = 1;
        } else {
          bytes = (int)strlcpy(bufp, ", ", size);
        }
        if (bytes && wrptr(&bufp, &size, bytes)!=0) WARN_STATIC_BUFFER();
        bytes = (int)strlcpy(bufp, spell_name(sp, f->locale), size);
        if (bytes && wrptr(&bufp, &size, bytes)!=0) WARN_STATIC_BUFFER();
      }

      for (i=0; i!=MAXCOMBATSPELLS; ++i) {
        if (get_combatspell(u, i)) break;
      }
      if (i!=MAXCOMBATSPELLS) {
        bytes = snprintf(bufp, size, ", %s: ", LOC(f->locale, "nr_combatspells"));
        if (bytes && wrptr(&bufp, &size, bytes)!=0) WARN_STATIC_BUFFER();

        dh = 0;
        for (i = 0; i < MAXCOMBATSPELLS; i++){
          const spell *sp;
          if (!dh){
            dh = 1;
          } else {
            bytes = (int)strlcpy(bufp, ", ", size);
            if (bytes && wrptr(&bufp, &size, bytes)!=0) {
              WARN_STATIC_BUFFER();
            }
          }
          sp = get_combatspell(u,i);
          if (sp) {
            int sl = get_combatspelllevel(u, i);
            bytes = (int)strlcpy(bufp, spell_name(sp, u->faction->locale), size);
            if (bytes && wrptr(&bufp, &size, bytes)!=0) {
              WARN_STATIC_BUFFER();
            }

            if (sl > 0) {
              bytes = snprintf(bufp, size, " (%d)", sl);
              if (bytes && wrptr(&bufp, &size, bytes)!=0) WARN_STATIC_BUFFER();
            }
          } else {
            bytes = (int)strlcpy(bufp, LOC(f->locale, "nr_nospells"), size);
            if (bytes && wrptr(&bufp, &size, bytes)!=0) WARN_STATIC_BUFFER();
          }
        }
      }
    }
#ifdef LASTORDER
    if (!isbattle && u->lastorder) {
      bytes = buforder(bufp, size, u->lastorder, 0);
      if (wrptr(&bufp, &size, bytes)!=0) WARN_STATIC_BUFFER();
    }
#else
    if (!isbattle) {
      boolean printed = 0;
      order * ord;;
      for (ord=u->old_orders;ord;ord=ord->next) {
        if (is_repeated(ord)) {
          if (printed<ORDERS_IN_NR) {
            bytes = (int)buforder(bufp, size, ord, printed++);
            if (wrptr(&bufp, &size, bytes)!=0) WARN_STATIC_BUFFER();
          } else break;
        }
      }
      if (printed<ORDERS_IN_NR) for (ord=u->orders;ord;ord=ord->next) {
        if (is_repeated(ord)) {
          if (printed<ORDERS_IN_NR) {
            bytes = (int)buforder(bufp, size, ord, printed++);
            if (wrptr(&bufp, &size, bytes)!=0) WARN_STATIC_BUFFER();
          } else break;
        }
      }
    }
#endif
  }
  i = 0;

  str = u_description(u, f->locale);
  if (str) {
    bytes = (int)strlcpy(bufp, "; ", size);
    if (wrptr(&bufp, &size, bytes)!=0) WARN_STATIC_BUFFER();

    bytes = (int)strlcpy(bufp, str, size);
    if (wrptr(&bufp, &size, bytes)!=0) WARN_STATIC_BUFFER();

    i = str[strlen(str) - 1];
  }
  if (i != '!' && i != '?' && i != '.') {
    if (size>1) {
      strcpy(bufp++, ".");
      --size;
    }
  }
  pzTmp = uprivate(u);
  if (u->faction == f && pzTmp) {
    bytes = (int)strlcpy(bufp, " (Bem: ", size);
    if (wrptr(&bufp, &size, bytes)!=0) WARN_STATIC_BUFFER();
    bytes = (int)strlcpy(bufp, pzTmp, size);
    if (wrptr(&bufp, &size, bytes)!=0) WARN_STATIC_BUFFER();
    bytes = (int)strlcpy(bufp, ")", size);
    if (wrptr(&bufp, &size, bytes)!=0) WARN_STATIC_BUFFER();
  }

  dh=0;
  if (!getarnt && f) {
    if (alliedfaction(u->region->planep, f, fv, HELP_ALL)) {
      dh = 1;
    }
  }
  if (size<=1) {
    log_warning(("bufunit ran out of space after writing %u bytes.\n", (bufp-buf)));
  }
  return dh;
}

/* TODO: telepath_see wird nicht ber<65>cksichtigt: Parteien mit
 * telepath_see sollten immer einzelne Einheiten zu sehen
 * bekommen, alles andere ist darstellungsteschnisch kompliziert.
 */

size_t
spskill(char * buffer, size_t size, const struct locale * lang, const struct unit * u, struct skill * sv, int *dh, int days)
{
  char * bufp = buffer;
  int i, effsk;
  int bytes;
  size_t tsize = 0;

  if (!u->number) return 0;
  if (sv->level<=0) {
    if (sv->old<=0 || (u->faction->options & want(O_SHOWSKCHANGE))==0) {
      return 0;
    }
  }

  bytes = (int)strlcpy(bufp, ", ", size);
  tsize += bytes;
  if (wrptr(&bufp, &size, bytes)!=0) WARN_STATIC_BUFFER();

  if (!*dh) {
    bytes = (int)strlcpy(bufp, LOC(lang, "nr_skills"), size);
    tsize += bytes;
    if (wrptr(&bufp, &size, bytes)!=0) WARN_STATIC_BUFFER();

    bytes = (int)strlcpy(bufp, ": ", size);
    tsize += bytes;
    if (wrptr(&bufp, &size, bytes)!=0) WARN_STATIC_BUFFER();

    *dh = 1;
  }
  bytes = (int)strlcpy(bufp, skillname(sv->id, lang), size);
  tsize += bytes;
  if (wrptr(&bufp, &size, bytes)!=0) WARN_STATIC_BUFFER();

  bytes = (int)strlcpy(bufp, " ", size);
  tsize += bytes;
  if (wrptr(&bufp, &size, bytes)!=0) WARN_STATIC_BUFFER();
  
  if (sv->id == SK_MAGIC){
    if (find_magetype(u) != M_GRAU){
      bytes = (int)strlcpy(bufp, LOC(lang, mkname("school", magietypen[find_magetype(u)])), size);
      tsize += bytes;
      if (wrptr(&bufp, &size, bytes)!=0) WARN_STATIC_BUFFER();

      bytes = (int)strlcpy(bufp, " ", size);
      tsize += bytes;
      if (wrptr(&bufp, &size, bytes)!=0) WARN_STATIC_BUFFER();
    }
  }
  
  if (sv->id == SK_STEALTH && fval(u, UFL_STEALTH)) {
    i = u_geteffstealth(u);
    if (i>=0) {
      bytes = slprintf(bufp, size, "%d/", i);
      tsize += bytes;
      if (wrptr(&bufp, &size, bytes)!=0) WARN_STATIC_BUFFER();
    }
  }
  
  effsk = effskill(u, sv->id);
  bytes = slprintf(bufp, size, "%d", effsk);
  tsize += bytes;
  if (wrptr(&bufp, &size, bytes)!=0) WARN_STATIC_BUFFER();
  
  if (u->faction->options & want(O_SHOWSKCHANGE)) {
    int oldeff = 0;
    int diff;
    
    if (sv->old > 0) {
      oldeff = sv->old + get_modifier(u, sv->id, sv->old, u->region, false);
    }
    
    oldeff = max(0, oldeff);
    diff   = effsk - oldeff; 
    
    if (diff != 0) {
      bytes = slprintf(bufp, size, " (%s%d)", (diff>0)?"+":"", diff);
      tsize += bytes;
      if (wrptr(&bufp, &size, bytes)!=0) WARN_STATIC_BUFFER();
    }
  }
  return tsize;
}

void
lparagraph(struct strlist ** SP, char *s, int indent, char mark)
{

	/* Die Liste SP wird mit dem String s aufgefuellt, mit indent und einer
	 * mark, falls angegeben. SP wurde also auf 0 gesetzt vor dem Aufruf.
	 * Vgl. spunit (). */

	char *buflocal = calloc(strlen(s) + indent + 1, sizeof(char));

	if (indent) {
		memset(buflocal, ' ', indent);
		if (mark)
			buflocal[indent - 2] = mark;
	}
	strcpy(buflocal + indent, s);
	addstrlist(SP, buflocal);
	free(buflocal);
}

void
spunit(struct strlist ** SP, const struct faction * f, const unit * u, int indent,
       int mode)
{
  char buf[DISPLAYSIZE];
  int dh = bufunit(f, u, indent, mode, buf, sizeof(buf));
  lparagraph(SP, buf, indent, (char) ((u->faction == f) ? '*' : (dh ? '+' : '-')));
}

struct message * 
msg_curse(const struct curse * c, const void * obj, typ_t typ, int self)
{
  if (c->type->curseinfo) {
    /* if curseinfo returns NULL, then we don't want to tell the viewer anything. */
    return c->type->curseinfo(obj, typ, c, self);
  } else {
    message * msg = cinfo_simple(obj, typ, c, self);
    if (msg==NULL) {
      const char * unknown[] = { "unit_unknown", "region_unknown", "building_unknown", "ship_unknown" };
      msg = msg_message(mkname("curseinfo", unknown[typ]), "id", c->no);
      log_error(("no curseinfo function for %s and no fallback either.\n", c->type->cname));
    } else {
      log_error(("no curseinfo function for %s, using cinfo_simple fallback.\n", c->type->cname));
    }
    return msg;
  }
}

const struct unit *
ucansee(const struct faction *f, const struct unit *u, const struct unit *x)
{
  if (cansee(f, u->region, u, 0)) return u;
  return x;
}

static void
add_faction(faction_list ** flist, faction * sf)
{
  faction_list ** fnew = flist;
  while (*fnew && (*fnew)->data->no < sf->no) {
    fnew =&(*fnew)->next;
  }
  if ((*fnew==NULL) || (*fnew)->data!=sf) {
    faction_list * finsert = malloc(sizeof(faction_list));
    finsert->next = *fnew;
    *fnew = finsert;
    finsert->data = sf;
  }
}

int
stealth_modifier(int seen_mode)
{
  switch (seen_mode) {
  case see_unit:
    return 0;
  case see_far:
  case see_lighthouse:
    return -2;
  case see_travel:
    return -1;
  default:
    return INT_MIN;
  }
}

static void
get_addresses(report_context * ctx)
{
/* "TODO: travelthru" */
  seen_region * sr = NULL;
  region *r;
  const faction * lastf = NULL;
  faction_list * flist = calloc(1, sizeof(faction_list));
  
  flist->data = ctx->f;

  for (r=ctx->first;sr==NULL && r!=ctx->last;r=r->next) {
    sr = find_seen(ctx->seen, r);
  }
  
  for (;sr!=NULL;sr=sr->next) {
    int stealthmod = stealth_modifier(sr->mode);
    r = sr->r;
    if (sr->mode==see_lighthouse) {
      unit * u = r->units;
      for (;u;u=u->next) {
        faction * sf = visible_faction(ctx->f, u);
        if (lastf!=sf) {
          if (u->building || u->ship || (stealthmod>INT_MIN && cansee(ctx->f, r, u, stealthmod))) {
            add_faction(&flist, sf);
            lastf = sf;
          }
        }
      }
    } else if (sr->mode==see_travel) {
      unit * u = r->units;
      while (u) {
        faction * sf = visible_faction(ctx->f, u);
        assert(u->faction!=ctx->f); /* if this is see_travel only, then I shouldn't be here. */
        if (lastf!=sf) {
          attrib * a = a_find(r->attribs, &at_travelunit);
          while (a && a->type==&at_travelunit) {
            unit * u2 = (unit*)a->data.v;
            if (u2->faction==ctx->f) {
              if (cansee_unit(u2, u, stealthmod)) {
                add_faction(&flist, sf);
                lastf = sf;
                break;
              }
            }
            a = a->next;
          }
        }
        u = u->next;
      }
    } else if (sr->mode>see_travel) {
      const unit * u = r->units;
      while (u!=NULL) {
        if (u->faction!=ctx->f) {
          faction * sf = visible_faction(ctx->f, u);
          boolean ballied = sf && sf!=ctx->f && sf!=lastf
            && !fval(u, UFL_PARTEITARNUNG) && cansee(ctx->f, r, u, stealthmod);
          if (ballied || ALLIED(ctx->f, sf)) {
            add_faction(&flist, sf);
            lastf = sf;
          }
        }
        u = u->next;
      }    
    }
  }
  
  if (ctx->f->alliance != NULL) {
    faction *f2;
    for (f2 = factions; f2; f2 = f2->next) {
      if (f2->alliance != NULL && f2->alliance == ctx->f->alliance) {
        add_faction(&flist, f2);
      }
    }
  }
  ctx->addresses = flist;
}

#define MAXSEEHASH 0x3000
seen_region * reuse;

seen_region **
seen_init(void)
{
  return (seen_region **)calloc(MAXSEEHASH, sizeof(seen_region*));
}

void
seen_done(seen_region * seehash[])
{
  int i;
  for (i=0;i!=MAXSEEHASH;++i) {
    seen_region * sd = seehash[i];
    if (sd==NULL) continue;
    while (sd->nextHash!=NULL) sd = sd->nextHash;
    sd->nextHash = reuse;
    reuse = seehash[i];
    seehash[i] = NULL;
  }
  free(seehash);
}

void
free_seen(void)
{
  while (reuse) {
    seen_region * r = reuse;
    reuse = reuse->nextHash;
    free(r);
  }
}

void
link_seen(seen_region * seehash[], const region * first, const region * last)
{
  const region * r = first;
  seen_region * sr = NULL;

  if (first==last) return;

  do {
    sr = find_seen(seehash, r);
    r = r->next;
  } while (sr==NULL && r!=last);

  while (r!=last) {
    seen_region * sn = find_seen(seehash, r);
    if (sn!=NULL) {
      sr->next = sn;
      sr = sn;
    }
    r = r->next;
  }
  sr->next = 0;
}

seen_region *
find_seen(struct seen_region * seehash[], const region * r)
{
  unsigned int index = reg_hashkey(r) & (MAXSEEHASH-1);
  seen_region * find = seehash[index];
  while (find) {
    if (find->r==r) return find;
    find=find->nextHash;
  }
  return NULL;
}

static void
get_seen_interval(report_context * ctx)
{
  /* this is required to find the neighbour regions of the ones we are in,
   * which may well be outside of [firstregion, lastregion) */
  int i;
  for (i=0;i!=MAXSEEHASH;++i) {
    seen_region * sr = ctx->seen[i];
    while (sr!=NULL) {
      if (ctx->first==NULL || sr->r->index<ctx->first->index) {
        ctx->first = sr->r;
      }
      if (ctx->last!=NULL && sr->r->index>=ctx->last->index) {
        ctx->last = sr->r->next;
      }
      sr = sr->nextHash;
    }
  }
  link_seen(ctx->seen, ctx->first, ctx->last);
}

boolean
add_seen(struct seen_region * seehash[], struct region * r, unsigned char mode, boolean dis)
{
  seen_region * find = find_seen(seehash, r);
  if (find==NULL) {
    unsigned int index = reg_hashkey(r) & (MAXSEEHASH-1);
    if (!reuse) reuse = (seen_region*)calloc(1, sizeof(struct seen_region));
    find = reuse;
    reuse = reuse->nextHash;
    find->nextHash = seehash[index];
    seehash[index] = find;
    find->r = r;
  } else if (find->mode >= mode) {
    return false;
  }
  find->mode = mode;
  find->disbelieves |= dis;
  return true;
}

typedef struct report_type {
  struct report_type * next;
  report_fun write;
  const char * extension;
  int flag;
} report_type;

static report_type * report_types;

void 
register_reporttype(const char * extension, report_fun write, int flag)
{
  report_type * type = malloc(sizeof(report_type));
  type->extension = extension;
  type->write = write;
  type->flag = flag;
  type->next = report_types;
  report_types = type;
}

static region_list *
get_regions_distance(region * root, int radius)
{
  region_list * rptr, * rlist = NULL;
  region_list ** rp = &rlist;
  add_regionlist(rp, root);
  fset(root, RF_MARK);
  while (*rp) {
    region_list * r = *rp;
    direction_t d;
    rp = &r->next;
    for (d=0;d!=MAXDIRECTIONS;++d) {
      region * rn = rconnect(r->data, d);
      if (rn!=NULL && !fval(rn, RF_MARK) && distance(rn, root)<=radius) {
        add_regionlist(rp, rn);
        fset(rn, RF_MARK);
      }
    }
  }
  for (rptr=rlist;rptr;rptr=rptr->next) {
    freset(rptr->data, RF_MARK);
  }
  return rlist;
}

static void
view_default(struct seen_region ** seen, region *r, faction *f)
{
  direction_t dir;
  for (dir=0;dir!=MAXDIRECTIONS;++dir) {
    region * r2 = rconnect(r, dir);
    if (r2) {
      border * b = get_borders(r, r2);
      while (b) {
        if (!b->type->transparent(b, f)) break;
        b = b->next;
      }
      if (!b) add_seen(seen, r2, see_neighbour, false);
    }
  }
}

static void
view_neighbours(struct seen_region ** seen, region * r, faction * f)
{
  direction_t dir;
  for (dir=0;dir!=MAXDIRECTIONS;++dir) {
    region * r2 = rconnect(r, dir);
    if (r2) {
      border * b = get_borders(r, r2);
      while (b) {
        if (!b->type->transparent(b, f)) break;
        b = b->next;
      }
      if (!b) {
        if (add_seen(seen, r2, see_far, false)) {
          if (!(fval(r2->terrain, FORBIDDEN_REGION))) {
            direction_t dir;
            for (dir=0;dir!=MAXDIRECTIONS;++dir) {
              region * r3 = rconnect(r2, dir);
              if (r3) {
                border * b = get_borders(r2, r3);
                while (b) {
                  if (!b->type->transparent(b, f)) break;
                  b = b->next;
                }
                if (!b) add_seen(seen, r3, see_neighbour, false);
              }
            }
          }
        }
      }
    }
  }
}

static void
recurse_regatta(struct seen_region ** seen, region *center, region *r, faction *f, int maxdist)
{
  direction_t dir;
  int dist = distance(center, r);
  for (dir=0;dir!=MAXDIRECTIONS;++dir) {
    region * r2 = rconnect(r, dir);
    if (r2) {
      int ndist = distance(center, r2);
      if (ndist>dist && fval(r2->terrain, SEA_REGION)) {
        border * b = get_borders(r, r2);
        while (b) {
          if (!b->type->transparent(b, f)) break;
          b = b->next;
        }
        if (!b) {
          if (ndist<maxdist) {
            if (add_seen(seen, r2, see_far, false)) {
              recurse_regatta(seen, center, r2, f, maxdist);
            }
          } else add_seen(seen, r2, see_neighbour, false);
        }
      }
    }
  }
}

static void
view_regatta(struct seen_region ** seen, region * r, faction * f)
{
  unit *u;
  int skill = 0;
  for (u=r->units; u; u=u->next) {
    if (u->faction==f) {
      int es = effskill(u, SK_OBSERVATION);
      if (es>skill) skill=es;
    }
  }
  recurse_regatta(seen, r, r, f, skill/2);
}

static void
prepare_reports(void)
{
  region * r;
  faction * f;
  static const struct building_type * bt_lighthouse = NULL;
  if (bt_lighthouse==NULL) bt_lighthouse = bt_find("lighthouse");

  for (f = factions; f ; f = f->next) {
    if (f->seen) seen_done(f->seen);
    f->seen = seen_init();
  }

  for (r = regions; r ; r = r->next) {
    attrib *ru;
    unit * u;
    plane * p = r->planep;

    if (p) {
      watcher * w = p->watchers;
      for (;w;w=w->next) {
        add_seen(w->faction->seen, r, w->mode, false);
#ifdef SMART_INTERVALS
        update_interval(w->faction, r);
#endif
      }
    }

    for (u = r->units; u; u = u->next) {
      if (u->building && u->building->type==bt_lighthouse) {
        /* we are in a lighthouse. add the regions we can see from here! */
        int range = lighthouse_range(u->building, u->faction);
        region_list * rlist = get_regions_distance(r, range);
        region_list * rp = rlist;

        while (rp) {
          region * rl = rp->data;
          if (fval(rl->terrain, SEA_REGION)) {
            direction_t d;
            add_seen(u->faction->seen, rl, see_lighthouse, false);
            for (d=0;d!=MAXDIRECTIONS;++d) {
              region * rn = rconnect(rl, d);
              if (rn!=NULL) {
                add_seen(u->faction->seen, rn, see_neighbour, false);
              }
            }
          }
          rp = rp->next;
        }
        free_regionlist(rlist);
      }

      if (u->race != new_race[RC_SPELL] || u->number == RS_FARVISION) {
        if (fval(u, UFL_DISBELIEVES)) {
          add_seen(u->faction->seen, r, see_unit, true);
        } else {
          add_seen(u->faction->seen, r, see_unit, false);
        }
      }
    }

    if (fval(r, RF_TRAVELUNIT)) {
      for (ru = a_find(r->attribs, &at_travelunit); ru && ru->type==&at_travelunit; ru = ru->next) {
        unit * u = (unit*)ru->data.v;

        /* make sure the faction has not been removed this turn: */
        if (u->faction) {
          add_seen(u->faction->seen, r, see_travel, false);
        }
      }
    }
  }
}

static seen_region **
prepare_report(faction * f)
{
  struct seen_region * sr;
  region * r = firstregion(f);
  region * last = lastregion(f);

  for (sr=NULL; sr==NULL && r!=last; r=r->next) {
    sr = find_seen(f->seen, r);
  }

  for (;sr!=NULL;sr=sr->next) {
    if (sr->mode>see_neighbour) {
      region * r = sr->r;
      plane * p = r->planep;
      /* if no confusion in the region, add neighbors: */
      if (!is_cursed(r->attribs, C_REGCONF, 0)) {
        void (*view)(struct seen_region **, region *, faction *) = view_default;
        if (p && fval(p, PFL_SEESPECIAL)) {
          attrib * a = a_find(p->attribs, &at_viewrange);
          if (a) view = (void (*)(struct seen_region **, region *, faction *))a->data.f;
        }
        view(f->seen, r, f);
      }
    }
  }
  return f->seen;
}

int
write_reports(faction * f, time_t ltime)
{
  int backup = 1, maxbackup = 128;
  boolean gotit = false;
  struct report_context ctx;
  const char * encoding = "UTF-8";

  ctx.f = f;
  ctx.report_time = time(NULL);
  ctx.seen = prepare_report(f);
  ctx.first = firstregion(f);
  ctx.last = lastregion(f);
  ctx.addresses = NULL;
  ctx.userdata = NULL;
  get_seen_interval(&ctx);
  get_addresses(&ctx);

  do {
    report_type * rtype = report_types;

    errno = 0;
    log_stdio(stdout, "Reports for %s:", factionname(f));
    fflush(stdout);

    for (;rtype!=NULL;rtype=rtype->next) {
      if (f->options & rtype->flag) {
        char filename[MAX_PATH];
        sprintf(filename, "%s/%d-%s.%s", reportpath(), turn, factionid(f), rtype->extension);
        if (rtype->write(filename, &ctx, encoding)==0) {
          gotit = true;
        }
      }
    }

    if (errno) {
      char zText[64];
      puts(" ERROR");
      sprintf(zText, "Waiting %u seconds before retry", backup);
      perror(zText);
      sleep(backup);
      if (backup<maxbackup) {
        backup *= 2;
      }
    }
    else {
      puts(" DONE");
    }
  } while (errno);
  if (!gotit) {
    log_warning(("No report for faction %s!\n", factionid(f)));
  }
  freelist(ctx.addresses);
  seen_done(ctx.seen);
  return 0;
}

static void
nmr_warnings(void)
{
  faction *f,*fa;
#define FRIEND (HELP_GUARD|HELP_MONEY)
  for (f=factions;f;f=f->next) {
    if (f->no != MONSTER_FACTION && (turn-f->lastorders) >= 2) {
      message * msg = NULL;
      for (fa=factions;fa;fa=fa->next) {
        if (alliedfaction(NULL, f, fa, FRIEND) && alliedfaction(NULL, fa, f, FRIEND)) {
          if (msg==NULL) {
            msg = msg_message("warn_dropout", "faction", f);
          }
          add_message(&fa->msgs, msg);
        }
      }
      if (msg!=NULL) msg_release(msg);
    }
  }
}

static void
report_donations(void)
{
  region * r;
  for (r=regions;r;r=r->next) {
    while (r->donations) {
      donation * sp = r->donations;
      if (sp->amount > 0) {
        struct message * msg = msg_message("donation",
          "from to amount", sp->f1, sp->f2, sp->amount);
        r_addmessage(r, sp->f1, msg);
        r_addmessage(r, sp->f2, msg);
        msg_release(msg);
      }
      r->donations = sp->next;
      free(sp);
    }
  }
}

static void
write_script(FILE * F, const faction * f)
{
  report_type * rtype;
  char buf[1024];

  fprintf(F, "faction=%s:email=%s", factionid(f), f->email);
  if (f->options & (1<<O_BZIP2)) fputs(":compression=bz2", F);
  else fputs(":compression=zip", F);

  fputs(":reports=", F);
  buf[0] = 0;
  for (rtype=report_types;rtype!=NULL;rtype=rtype->next) {
    if (f->options&rtype->flag) {
      if (buf[0]) strcat(buf, ",");
      strcat(buf, rtype->extension);
    }
  }
  fputs(buf, F);
  fputc('\n', F);
}

int
init_reports(void)
{
  prepare_reports();
#ifdef HAVE_STAT
  {
    stat_type st;
    if (stat(reportpath(), &st)==0) return 0;
  }
#endif
  if (makedir(reportpath(), 0700)!=0) {
    if (errno!=EEXIST) {
      perror("could not create reportpath");
      return -1;
    }
  }
  return 0;
}

int
reports(void)
{
  faction *f;
  FILE *mailit;
  time_t ltime = time(NULL);
  const char * str;
  int retval = 0;
  char path[MAX_PATH];

  nmr_warnings();
  report_donations();
  remove_empty_units();

  sprintf(path, "%s/reports.txt", reportpath());
  mailit = fopen(path, "w");
  if (mailit == NULL) {
    log_error(("%s could not be opened!\n", path));
  }

  for (f = factions; f; f = f->next) {
    int error = write_reports(f, ltime);
    if (error) retval = error;
    if (mailit) write_script(mailit, f);
  }
  if (mailit) fclose(mailit);
  free_seen();
  str = get_param(global.parameters, "globalreport"); 
#ifdef GLOBAL_REPORT
  if (str!=NULL) {
    sprintf(path, "%s/%s.%u.cr", reportpath(), str, turn);
    global_report(path);
  }
#endif
  return retval;
}

static variant
var_copy_string(variant x)
{
  x.v = strdup((const char*)x.v);
  return x;
}

static void
var_free_string(variant x)
{
  free(x.v);
}

static variant
var_copy_order(variant x)
{
  x.v = copy_order((order*)x.v);
  return x;
}

static void
var_free_order(variant x)
{
  free_order(x.v);
}

static variant
var_copy_items(variant x)
{
  item * isrc;
  resource * rdst = NULL, ** rptr = &rdst;

  for (isrc = (item*)x.v; isrc!=NULL; isrc=isrc->next) {
    resource * res = malloc(sizeof(resource));
    res->number = isrc->number;
    res->type = isrc->type->rtype;
    *rptr = res;
    rptr = &res->next;
  }
  *rptr = NULL;
  x.v = rdst;
  return x;
}

static void
var_free_resources(variant x)
{
  resource ** rsrc = (resource**)&x.v;
  while (*rsrc) {
    resource * res = *rsrc;
    *rsrc = res->next;
    free(res);
  }
}

static variant
var_copy_regions(variant x)
{
  region_list * rsrc;
  int size = 0;

  for (rsrc = (region_list*)x.v; rsrc!=NULL; rsrc=rsrc->next) {
    ++size;
  }

  if (size>0) {
    arg_regions * dst = (arg_regions *)malloc(sizeof(arg_regions) + sizeof(region*) * size);
    dst->nregions = size;
    dst->regions = (region**)(dst+1);
    size = 0;
    for (rsrc = (region_list*)x.v; rsrc!=NULL; rsrc=rsrc->next) {
      dst->regions[size++] = rsrc->data;
    }
    x.v = dst;
  } else {
    x.v = NULL;
  }
  return x;
}

static void
var_free_regions(variant x)
{
  free(x.v);
}

const char *
trailinto(const region * r, const struct locale * lang)
{
  char ref[32];
  const char * s;
  if (r) {
    const char * tname = terrain_name(r);
    strcat(strcpy(ref, tname), "_trail");
    s = locale_string(lang, ref);
    if (s && *s) {
      if (strstr(s, "%s"))  return s;
    }
  }
  return "%s";
}

size_t
f_regionid(const region * r, const faction * f, char * buffer, size_t size)
{

  if (!r) {
    strncpy(buffer, "(Chaos)", size);
  } else {
    plane * pl = r->planep;
    strncpy(buffer, rname(r, f->locale), size);
    buffer[size-1]=0;
    if (pl==NULL || !fval(pl, PFL_NOCOORDS)) {
      sprintf(buffer+strlen(buffer), " (%d,%d%s%s)", region_x(r,f), region_y(r,f), pl?",":"", pl?pl->name:"");
    }
  }
  return strlen(buffer);
}

static char *
f_regionid_s(const region * r, const faction * f)
{
  static int i = 0;
  static char bufs[4][NAMESIZE + 20];
  char * buf = bufs[(++i)%4];

  f_regionid(r, f, buf, NAMESIZE + 20);
  return buf;
}

/*** BEGIN MESSAGE RENDERING ***/
static void
eval_localize(struct opstack ** stack, const void * userdata) /* (string, locale) -> string */
{
  const struct faction * f = (const struct faction *)userdata;
  const struct locale * lang = f?f->locale:default_locale;
  const char *c = (const char *)opop_v(stack);
  c = locale_string(lang, c);
  opush_v(stack, strcpy(balloc(strlen(c)+1), c));
}

static void 
eval_trailto(struct opstack ** stack, const void * userdata) /* (int, int) -> int */
{
  const struct faction * f = (const struct faction *)userdata;
  const struct locale * lang = f?f->locale:default_locale;
  const struct region * r = (const struct region*)opop(stack).v;
  const char * trail = trailinto(r, lang);
  const char * rn = f_regionid_s(r, f);
  variant var;
  char * x = var.v = balloc(strlen(trail)+strlen(rn));
  sprintf(x, trail, rn);
  opush(stack, var);
}

static void
eval_unit(struct opstack ** stack, const void * userdata) /* unit -> string */
{
  const struct faction * f = (const struct faction *)userdata;
  const struct unit * u = (const struct unit *)opop(stack).v;
  const char * c = u?unitname(u):LOC(f->locale, "an_unknown_unit");
  size_t len = strlen(c);
  variant var;

  var.v = strcpy(balloc(len+1), c);
  opush(stack, var);
}

static void
eval_unit_dative(struct opstack ** stack, const void * userdata) /* unit -> string */
{
  const struct faction * f = (const struct faction *)userdata;
  const struct unit * u = (const struct unit *)opop(stack).v;
  const char * c = u?unitname(u):LOC(f->locale, "unknown_unit_dative");
  size_t len = strlen(c);
  variant var;

  var.v = strcpy(balloc(len+1), c);
  opush(stack, var);
}

static void
eval_spell(struct opstack ** stack, const void * userdata) /* unit -> string */
{
  const struct faction * f = (const struct faction *)userdata;
  const struct spell * sp = (const struct spell *)opop(stack).v;
  const char * c = sp?spell_name(sp, f->locale):LOC(f->locale, "an_unknown_spell");
  size_t len = strlen(c);
  variant var;

  var.v = strcpy(balloc(len+1), c);
  opush(stack, var);
}

static void
eval_curse(struct opstack ** stack, const void * userdata) /* unit -> string */
{
  const struct faction * f = (const struct faction *)userdata;
  const struct curse_type * sp = (const struct curse_type *)opop(stack).v;
  const char * c = sp?curse_name(sp, f->locale):LOC(f->locale, "an_unknown_curse");
  size_t len = strlen(c);
  variant var;

  var.v = strcpy(balloc(len+1), c);
  opush(stack, var);
}

static void
eval_unitname(struct opstack ** stack, const void * userdata) /* unit -> string */
{
  const struct faction * f = (const struct faction *)userdata;
  const struct unit * u = (const struct unit *)opop(stack).v;
  const char * c = u?u->name:LOC(f->locale, "an_unknown_unit");
  size_t len = strlen(c);
  variant var;

  var.v = strcpy(balloc(len+1), c);
  opush(stack, var);
}


static void
eval_unitid(struct opstack ** stack, const void * userdata) /* unit -> int */
{
  const struct faction * f = (const struct faction *)userdata;
  const struct unit * u = (const struct unit *)opop(stack).v;
  const char * c = u?u->name:LOC(f->locale, "an_unknown_unit");
  size_t len = strlen(c);
  variant var;

  var.v = strcpy(balloc(len+1), c);
  opush(stack, var);
}

static void
eval_unitsize(struct opstack ** stack, const void * userdata) /* unit -> int */
{
  const struct unit * u = (const struct unit *)opop(stack).v;
  variant var;

  var.i = u->number;
  opush(stack, var);
}

static void
eval_faction(struct opstack ** stack, const void * userdata) /* faction -> string */
{
  const struct faction * f = (const struct faction *)opop(stack).v;
  const char * c = factionname(f);
  size_t len = strlen(c);
  variant var;

  var.v = strcpy(balloc(len+1), c);
  opush(stack, var);
}

static void
eval_alliance(struct opstack ** stack, const void * userdata) /* faction -> string */
{
  const struct alliance * al = (const struct alliance *)opop(stack).v;
  const char * c = alliancename(al);
  variant var;
  if (c!=NULL) {
    size_t len = strlen(c);
    var.v = strcpy(balloc(len+1), c);
  }
  else var.v = NULL;
  opush(stack, var);
}

static void
eval_region(struct opstack ** stack, const void * userdata) /* region -> string */
{
  char name[NAMESIZE+32];
  const struct faction * f = (const struct faction *)userdata;
  const struct region * r = (const struct region *)opop(stack).v;
  const char * c = write_regionname(r, f, name, sizeof(name));
  size_t len = strlen(c);
  variant var;

  var.v = strcpy(balloc(len+1), c);
  opush(stack, var);
}

static void
eval_terrain(struct opstack ** stack, const void * userdata) /* region -> string */
{
  const struct faction * f = (const struct faction *)userdata;
  const struct region * r = (const struct region *)opop(stack).v;
  const char * c = LOC(f->locale, terrain_name(r));
  size_t len = strlen(c);
  variant var;

  var.v = strcpy(balloc(len+1), c);
  opush(stack, var);
}

static void
eval_ship(struct opstack ** stack, const void * userdata) /* ship -> string */
{
  const struct faction * f = (const struct faction *)userdata;
  const struct ship * u = (const struct ship *)opop(stack).v;
  const char * c = u?shipname(u):LOC(f->locale, "an_unknown_ship");
  size_t len = strlen(c);
  variant var;

  var.v = strcpy(balloc(len+1), c);
  opush(stack, var);
}

static void
eval_building(struct opstack ** stack, const void * userdata) /* building -> string */
{
  const struct faction * f = (const struct faction *)userdata;
  const struct building * u = (const struct building *)opop(stack).v;
  const char * c = u?buildingname(u):LOC(f->locale, "an_unknown_building");
  size_t len = strlen(c);
  variant var;

  var.v = strcpy(balloc(len+1), c);
  opush(stack, var);
}

static void
eval_weight(struct opstack ** stack, const void * userdata) /* region -> string */
{
  char buffer[32];
  const struct faction * f = (const struct faction *)userdata;
  const struct locale * lang = f->locale;
  int weight = opop_i(stack);
  variant var;

  if (weight % SCALEWEIGHT == 0) {
    if (weight==SCALEWEIGHT) {
      sprintf(buffer, "1 %s", LOC(lang, "weight_unit"));
    } else {
      sprintf(buffer, "%u %s", weight/SCALEWEIGHT, LOC(lang, "weight_unit_p"));
    }
  } else {
    if (weight==1) {
      sprintf(buffer, "1 %s %u", LOC(lang, "weight_per"), SCALEWEIGHT);
    } else {
      sprintf(buffer, "%u %s %u", weight, LOC(lang, "weight_per_p"), SCALEWEIGHT);
    }
  }

  var.v = strcpy(balloc(strlen(buffer)+1), buffer);
  opush(stack, var);
}

static void
eval_resource(struct opstack ** stack, const void * userdata)
{
  const faction * report = (const faction*)userdata;
  int j = opop(stack).i;
  const struct resource_type * res = (const struct resource_type *)opop(stack).v;
  const char * c = LOC(report->locale, resourcename(res, j!=1));
  size_t len = strlen(c);
  variant var;

  var.v = strcpy(balloc(len+1), c);
  opush(stack, var);
}

static void
eval_race(struct opstack ** stack, const void * userdata)
{
  const faction * report = (const faction*)userdata;
  int j = opop(stack).i;
  const race * r = (const race *)opop(stack).v;
  const char * c = LOC(report->locale, rc_name(r, j!=1));
  size_t len = strlen(c);
  variant var;

  var.v = strcpy(balloc(len+1), c);
  opush(stack, var);
}

static void
eval_order(struct opstack ** stack, const void * userdata) /* order -> string */
{
  const faction * report = (const faction*)userdata;
  const struct order * ord = (const struct order *)opop(stack).v;
  static char buf[256];
  size_t len;
  variant var;

  write_order(ord, report->locale, buf, sizeof(buf));
  len = strlen(buf);
  var.v = strcpy(balloc(len+1), buf);
  opush(stack, var);
}

static void
eval_resources(struct opstack ** stack, const void * userdata) /* order -> string */
{
  const faction * report = (const faction*)userdata;
  const struct resource * res = (const struct resource *)opop(stack).v;
  static char buf[512];
  size_t size = sizeof(buf) - 1;
  variant var;

  char * bufp = buf;
  while (res!=NULL && size > 4) {
    const char * rname = resourcename(res->type, (res->number!=1)?NMF_PLURAL:0);
    int bytes = snprintf(bufp, size, "%d %s", res->number, LOC(report->locale, rname));
    if (bytes && wrptr(&bufp, &size, bytes)!=0) WARN_STATIC_BUFFER();

    res = res->next;
    if (res!=NULL && size>2) {
      strcat(bufp, ", ");
      bufp += 2;
      size -= 2;
    }
  }
  *bufp = 0;
  var.v = strcpy(balloc(bufp-buf+1), buf);
  opush(stack, var);
}

static void
eval_regions(struct opstack ** stack, const void * userdata) /* order -> string */
{
  const faction * report = (const faction*)userdata;
  int i = opop(stack).i;
  int end, begin = opop(stack).i;
  const arg_regions * regions = (const arg_regions *)opop(stack).v;
  static char buf[256];
  size_t size = sizeof(buf) - 1;
  variant var;
  char * bufp = buf;

  if (regions==NULL) {
    end = begin;
  } else {
    if (i>=0) end = begin+i;
    else end = regions->nregions+i;
  }
  for (i=begin;i<end;++i) {
    const char * rname = (const char*)regionname(regions->regions[i], report);
    int bytes = (int)strlcpy(bufp, rname, size);
    if (bytes && wrptr(&bufp, &size, bytes)!=0) WARN_STATIC_BUFFER();

    if (i+1<end && size>2) {
      strcat(bufp, ", ");
      bufp += 2;
      size -= 2;
    }
  }
  *bufp = 0;
  var.v = strcpy(balloc(bufp-buf+1), buf);
  opush(stack, var);
}

static void
eval_trail(struct opstack ** stack, const void * userdata) /* order -> string */
{
  const faction * report = (const faction*)userdata;
  int i, end = 0, begin = 0;
  const arg_regions * regions = (const arg_regions *)opop(stack).v;
  static char buf[256];
  size_t size = sizeof(buf) - 1;
  variant var;
  char * bufp = buf;

  if (regions!=NULL) {
    end = regions->nregions-1;
    for (i=begin;i<end;++i) {
      region * r = regions->regions[i];
      const char * trail = trailinto(r, report->locale);
      const char * rn = f_regionid_s(r, report);
      int bytes = snprintf(bufp, size, trail, rn);
      if (bytes && wrptr(&bufp, &size, bytes)!=0) WARN_STATIC_BUFFER();

      if (i+2<end) {
        bytes = (int)strlcpy(bufp, ", ", size);
      } else if (i+1<end) {
        bytes = (int)strlcpy(bufp, LOC(report->locale, "list_and"), size);
      } else bytes = 0;

      if (bytes && wrptr(&bufp, &size, bytes)!=0) WARN_STATIC_BUFFER();
    }
  }
  *bufp = 0;
  var.v = strcpy(balloc(bufp-buf+1), buf);
  opush(stack, var);
}

static void
eval_direction(struct opstack ** stack, const void * userdata)
{
  const faction * report = (const faction*)userdata;
  int i = opop(stack).i;
  const char * c = LOC(report->locale, (i>=0)?directions[i]:"unknown_direction");
  size_t len = strlen(c);
  variant var;

  var.v = strcpy(balloc(len+1), c);
  opush(stack, var);
}

static void
eval_skill(struct opstack ** stack, const void * userdata)
{
  const faction * report = (const faction*)userdata;
  skill_t sk = (skill_t)opop(stack).i;
  const char * c = skillname(sk, report->locale);
  size_t len = strlen(c);
  variant var;

  var.v = strcpy(balloc(len+1), c);
  opush(stack, var);
}

static void
eval_int36(struct opstack ** stack, const void * userdata)
{
  int i = opop(stack).i;
  const char * c = itoa36(i);
  size_t len = strlen(c);
  variant var;

  var.v = strcpy(balloc(len+1), c);
  opush(stack, var);
  unused(userdata);
}
/*** END MESSAGE RENDERING ***/

void
reports_init(void)
{
  /* register datatypes for the different message objects */
  register_argtype("alliance", NULL, NULL, VAR_VOIDPTR);
  register_argtype("building", NULL, NULL, VAR_VOIDPTR);
  register_argtype("direction", NULL, NULL, VAR_INT);
  register_argtype("faction", NULL, NULL, VAR_VOIDPTR);
  register_argtype("race", NULL, NULL, VAR_VOIDPTR);
  register_argtype("region", NULL, NULL, VAR_VOIDPTR);
  register_argtype("resource", NULL, NULL, VAR_VOIDPTR);
  register_argtype("ship", NULL, NULL, VAR_VOIDPTR);
  register_argtype("skill", NULL, NULL, VAR_VOIDPTR);
  register_argtype("spell", NULL, NULL, VAR_VOIDPTR);
  register_argtype("curse", NULL, NULL, VAR_VOIDPTR);
  register_argtype("unit", NULL, NULL, VAR_VOIDPTR);
  register_argtype("int", NULL, NULL, VAR_INT);
  register_argtype("string", var_free_string, var_copy_string, VAR_VOIDPTR);
  register_argtype("order", var_free_order, var_copy_order, VAR_VOIDPTR);
  register_argtype("resources", var_free_resources, NULL, VAR_VOIDPTR);
  register_argtype("items", var_free_resources, var_copy_items, VAR_VOIDPTR);
  register_argtype("regions", var_free_regions, var_copy_regions, VAR_VOIDPTR);

  /* register functions that turn message contents to readable strings */
  add_function("alliance", &eval_alliance);
  add_function("region", &eval_region);
  add_function("terrain", &eval_terrain);
  add_function("weight", &eval_weight);
  add_function("resource", &eval_resource);
  add_function("race", &eval_race);
  add_function("faction", &eval_faction);
  add_function("ship", &eval_ship);
  add_function("unit", &eval_unit);
  add_function("unit.dative", &eval_unit_dative);
  add_function("unit.name", &eval_unitname);
  add_function("unit.id", &eval_unitid);
  add_function("unit.size", &eval_unitsize);
  add_function("building", &eval_building);
  add_function("skill", &eval_skill);
  add_function("order", &eval_order);
  add_function("direction", &eval_direction);
  add_function("int36", &eval_int36);
  add_function("trailto", &eval_trailto);
  add_function("localize", &eval_localize);
  add_function("spell", &eval_spell);
  add_function("curse", &eval_curse);
  add_function("resources", &eval_resources);
  add_function("regions", &eval_regions);
  add_function("trail", &eval_trail);

  /* register alternative visibility functions */
  register_function((pf_generic)view_neighbours, "view_neighbours");
  register_function((pf_generic)view_regatta, "view_regatta");
}