tbamud/src/dg_triggers.c

/**************************************************************************
*  File: dg_triggers.c                                     part of tbaMUD *
*  Usage: Contains all the trigger functions for scripts.                 *
*                                                                         *
*  All rights reserved.  See license for complete information.            *
*                                                                         *
*  Death's Gate MUD is based on CircleMUD, Copyright (C) 1993, 94.        *
*  CircleMUD is based on DikuMUD, Copyright (C) 1990, 1991.               *
*                                                                         *
*  $Author: galion/Mark A. Heilpern/egreen/Welcor $                       *
*  $Date: 2004/10/11 12:07:00$                                            *
*  $Revision: 1.0.14 $                                                    *
**************************************************************************/

#include "conf.h"
#include "sysdep.h"
#include "structs.h"
#include "dg_scripts.h"
#include "utils.h"
#include "comm.h"
#include "interpreter.h"
#include "handler.h"
#include "db.h"
#include "oasis.h"
#include "constants.h"

extern const char *cmd_door[];
extern struct time_info_data time_info;

/* external functions */
const char *skill_name(int num);

/* General functions used by several triggers. */

/* Copy first phrase into first_arg, returns rest of string. */
char *one_phrase(char *arg, char *first_arg)
{
    skip_spaces(&arg);

    if (!*arg)
        *first_arg = '\0';

    else if (*arg == '"')
    {
        char *p, c;

        p = matching_quote(arg);
        c = *p;
        *p = '\0';
        strcpy(first_arg, arg + 1);
        if (c == '\0')
            return p;
        else
            return p + 1;
    }

    else
    {
        char *s, *p;

        s = first_arg;
        p = arg;

        while (*p && !isspace(*p) && *p != '"')
            *s++ = *p++;

        *s = '\0';
        return p;
    }

    return arg;
}

int is_substring(char *sub, char *string)
{
    char *s;

    if ((s = str_str(string, sub)))
    {
        int len = strlen(string);
        int sublen = strlen(sub);

        /* check front */
        if ((s == string || isspace(*(s - 1)) || ispunct(*(s - 1))) &&

            /* check end */
            ((s + sublen == string + len) || isspace(s[sublen]) ||
             ispunct(s[sublen])))
            return 1;
    }

    return 0;
}

/* Return 1 if str contains a word or phrase from wordlist. Phrases are in 
 * double quotes ("). if wrdlist is NULL, then return 1, if str is NULL, 
 * return 0. */
int word_check(char *str, char *wordlist)
{
    char words[MAX_INPUT_LENGTH], phrase[MAX_INPUT_LENGTH], *s;

    if (*wordlist=='*') return 1;

    strcpy(words, wordlist);

    for (s = one_phrase(words, phrase); *phrase; s = one_phrase(s, phrase))
        if (is_substring(phrase, str))
            return 1;

    return 0;
}

/*Mob triggers. */
void random_mtrigger(char_data *ch)
{
  trig_data *t;

  /* This trigger is only called if a char is in the zone without nohassle. */
  if (!SCRIPT_CHECK(ch, MTRIG_RANDOM) || AFF_FLAGGED(ch, AFF_CHARM))
    return;

  for (t = TRIGGERS(SCRIPT(ch)); t; t = t->next) {
    if (TRIGGER_CHECK(t, MTRIG_RANDOM) &&
        (rand_number(1, 100) <= GET_TRIG_NARG(t))) {
      script_driver(&ch, t, MOB_TRIGGER, TRIG_NEW);
      break;
    }
  }
}

void bribe_mtrigger(char_data *ch, char_data *actor, int amount)
{
  trig_data *t;
  char buf[MAX_INPUT_LENGTH];

  if (!SCRIPT_CHECK(ch, MTRIG_BRIBE) || AFF_FLAGGED(ch, AFF_CHARM))
    return;

  for (t = TRIGGERS(SCRIPT(ch)); t; t = t->next) {
    if (TRIGGER_CHECK(t, MTRIG_BRIBE) && (amount >= GET_TRIG_NARG(t))) {
      snprintf(buf, sizeof(buf), "%d", amount);
      add_var(&GET_TRIG_VARS(t), "amount", buf, 0);
      ADD_UID_VAR(buf, t, actor, "actor", 0);
      script_driver(&ch, t, MOB_TRIGGER, TRIG_NEW);
      break;
    }
  }
}

void greet_memory_mtrigger(char_data *actor)
{
  trig_data *t;
  char_data *ch;
  struct script_memory *mem;
  char buf[MAX_INPUT_LENGTH];
  int command_performed = 0;

  if (!valid_dg_target(actor, DG_ALLOW_GODS))
    return;

  for (ch = world[IN_ROOM(actor)].people; ch; ch = ch->next_in_room) {
    if (!SCRIPT_MEM(ch) || !AWAKE(ch) || FIGHTING(ch) || (ch == actor) ||
        AFF_FLAGGED(ch, AFF_CHARM))
      continue;
    /* find memory line with command only */
    for (mem = SCRIPT_MEM(ch); mem && SCRIPT_MEM(ch); mem=mem->next) {
      if (GET_ID(actor)!=mem->id) continue;
      if (mem->cmd) {
        command_interpreter(ch, mem->cmd); /* no script */
        command_performed = 1;
        break;
      }
      /* if a command was not performed execute the memory script */
      if (mem && !command_performed) {
        for (t = TRIGGERS(SCRIPT(ch)); t; t = t->next) {
          if (IS_SET(GET_TRIG_TYPE(t), MTRIG_MEMORY) &&
              CAN_SEE(ch, actor) &&
              !GET_TRIG_DEPTH(t) &&
              rand_number(1, 100) <= GET_TRIG_NARG(t)) {
              ADD_UID_VAR(buf, t, actor, "actor", 0);
              script_driver(&ch, t, MOB_TRIGGER, TRIG_NEW);
              break;
          }
        }
      }
      /* delete the memory */
      if (mem) {
        if (SCRIPT_MEM(ch)==mem) {
          SCRIPT_MEM(ch) = mem->next;
        } else {
          struct script_memory *prev;
          prev = SCRIPT_MEM(ch);
          while (prev->next != mem) prev = prev->next;
          prev->next = mem->next;
        }
        if (mem->cmd) free(mem->cmd);
        free(mem);
      }
    }
  }
}

int greet_mtrigger(char_data *actor, int dir)
{
  trig_data *t;
  char_data *ch;
  char buf[MAX_INPUT_LENGTH];
  int intermediate, final=TRUE;

  if (!valid_dg_target(actor, DG_ALLOW_GODS))
    return TRUE;

  for (ch = world[IN_ROOM(actor)].people; ch; ch = ch->next_in_room) {
    if (!SCRIPT_CHECK(ch, MTRIG_GREET | MTRIG_GREET_ALL) ||
        !AWAKE(ch) || FIGHTING(ch) || (ch == actor) ||
        AFF_FLAGGED(ch, AFF_CHARM))
      continue;

    for (t = TRIGGERS(SCRIPT(ch)); t; t = t->next) {
      if (((IS_SET(GET_TRIG_TYPE(t), MTRIG_GREET) && CAN_SEE(ch, actor)) ||
           IS_SET(GET_TRIG_TYPE(t), MTRIG_GREET_ALL)) &&
          !GET_TRIG_DEPTH(t) && (rand_number(1, 100) <= GET_TRIG_NARG(t))) {
        if (dir>=0 && dir < NUM_OF_DIRS)
          add_var(&GET_TRIG_VARS(t), "direction", (char *)dirs[rev_dir[dir]], 0);
        else
          add_var(&GET_TRIG_VARS(t), "direction", "none", 0);
        ADD_UID_VAR(buf, t, actor, "actor", 0);
        intermediate = script_driver(&ch, t, MOB_TRIGGER, TRIG_NEW);
        if (!intermediate) final = FALSE;
        continue;
      }
    }
  }
  return final;
}

void entry_memory_mtrigger(char_data *ch)
{
  trig_data *t;
  char_data *actor;
  struct script_memory *mem;
  char buf[MAX_INPUT_LENGTH];

  if (!SCRIPT_MEM(ch) || AFF_FLAGGED(ch, AFF_CHARM))
    return;

  for (actor = world[IN_ROOM(ch)].people; actor && SCRIPT_MEM(ch);
       actor = actor->next_in_room) {
    if (actor!=ch && SCRIPT_MEM(ch)) {
      for (mem = SCRIPT_MEM(ch); mem && SCRIPT_MEM(ch); mem = mem->next) {
        if (GET_ID(actor)==mem->id) {
          struct script_memory *prev;
          if (mem->cmd) command_interpreter(ch, mem->cmd);
          else {
            for (t = TRIGGERS(SCRIPT(ch)); t; t = t->next) {
              if (TRIGGER_CHECK(t, MTRIG_MEMORY) && (rand_number(1, 100) <=
                  GET_TRIG_NARG(t))){
                ADD_UID_VAR(buf, t, actor, "actor", 0);
                script_driver(&ch, t, MOB_TRIGGER, TRIG_NEW);
                break;
              }
            }
          }
          /* delete the memory */
          if (SCRIPT_MEM(ch)==mem) {
            SCRIPT_MEM(ch) = mem->next;
          } else {
            prev = SCRIPT_MEM(ch);
            while (prev->next != mem) prev = prev->next;
            prev->next = mem->next;
          }
          if (mem->cmd) free(mem->cmd);
          free(mem);
        }
      } /* for (mem =..... */
    }
  }
}

int entry_mtrigger(char_data *ch)
{
  trig_data *t;

  if (!SCRIPT_CHECK(ch, MTRIG_ENTRY) || AFF_FLAGGED(ch, AFF_CHARM))
    return 1;

  for (t = TRIGGERS(SCRIPT(ch)); t; t = t->next) {
    if (TRIGGER_CHECK(t, MTRIG_ENTRY) && (rand_number(1, 100) <= GET_TRIG_NARG(t))){
      return script_driver(&ch, t, MOB_TRIGGER, TRIG_NEW);
      break;
    }
  }

  return 1;
}

int command_mtrigger(char_data *actor, char *cmd, char *argument)
{
  char_data *ch, *ch_next;
  trig_data *t;
  char buf[MAX_INPUT_LENGTH];

  /* prevent people we like from becoming trapped :P */
  if (!valid_dg_target(actor, 0))
    return 0;

  for (ch = world[IN_ROOM(actor)].people; ch; ch = ch_next) {
    ch_next = ch->next_in_room;

    if (SCRIPT_CHECK(ch, MTRIG_COMMAND) && !AFF_FLAGGED(ch, AFF_CHARM) &&
        (actor!=ch)) {
      for (t = TRIGGERS(SCRIPT(ch)); t; t = t->next) {
        if (!TRIGGER_CHECK(t, MTRIG_COMMAND))
          continue;

        if (!GET_TRIG_ARG(t) || !*GET_TRIG_ARG(t)) {
          mudlog(NRM, LVL_BUILDER, TRUE, "SYSERR: Command Trigger #%d has no text argument!",
            GET_TRIG_VNUM(t));
          continue;
        }

        if (*GET_TRIG_ARG(t)=='*' ||
            !strn_cmp(GET_TRIG_ARG(t), cmd, strlen(GET_TRIG_ARG(t)))) {
          ADD_UID_VAR(buf, t, actor, "actor", 0);
          skip_spaces(&argument);
          add_var(&GET_TRIG_VARS(t), "arg", argument, 0);
          skip_spaces(&cmd);
          add_var(&GET_TRIG_VARS(t), "cmd", cmd, 0);

          if (script_driver(&ch, t, MOB_TRIGGER, TRIG_NEW))
            return 1;
        }
      }
    }
  }

  return 0;
}

void speech_mtrigger(char_data *actor, char *str)
{
  char_data *ch, *ch_next;
  trig_data *t;
  char buf[MAX_INPUT_LENGTH];

  for (ch = world[IN_ROOM(actor)].people; ch; ch = ch_next)
  {
    ch_next = ch->next_in_room;

    if (SCRIPT_CHECK(ch, MTRIG_SPEECH) && AWAKE(ch) &&
        !AFF_FLAGGED(ch, AFF_CHARM) && (actor!=ch))
      for (t = TRIGGERS(SCRIPT(ch)); t; t = t->next) {
        if (!TRIGGER_CHECK(t, MTRIG_SPEECH))
          continue;

        if (!GET_TRIG_ARG(t) || !*GET_TRIG_ARG(t)) {
          mudlog(NRM, LVL_BUILDER, TRUE, "SYSERR: Speech Trigger #%d has no text argument!",
            GET_TRIG_VNUM(t));
          continue;
        }

        if (((GET_TRIG_NARG(t) && word_check(str, GET_TRIG_ARG(t))) ||
             (!GET_TRIG_NARG(t) && is_substring(GET_TRIG_ARG(t), str)))) {
          ADD_UID_VAR(buf, t, actor, "actor", 0);
          add_var(&GET_TRIG_VARS(t), "speech", str, 0);
          script_driver(&ch, t, MOB_TRIGGER, TRIG_NEW);
          break;
        }
      }
  }
}

void act_mtrigger(const char_data *ch, char *str, char_data *actor,
                  char_data *victim, obj_data *object,
                  obj_data *target, char *arg)
{
  trig_data *t;
  char buf[MAX_INPUT_LENGTH];

  if (SCRIPT_CHECK(ch, MTRIG_ACT) && !AFF_FLAGGED(ch, AFF_CHARM) &&
      (actor!=ch))
    for (t = TRIGGERS(SCRIPT(ch)); t; t = t->next)  {
      if (!TRIGGER_CHECK(t, MTRIG_ACT))
        continue;

      if (!GET_TRIG_ARG(t) || !*GET_TRIG_ARG(t)) {
        mudlog(NRM, LVL_BUILDER, TRUE, "SYSERR: Act Trigger #%d has no text argument!",
          GET_TRIG_VNUM(t));
        continue;
      }

      if (((GET_TRIG_NARG(t) && word_check(str, GET_TRIG_ARG(t))) ||
           (!GET_TRIG_NARG(t) && is_substring(GET_TRIG_ARG(t), str)))) {
        if (actor)
          ADD_UID_VAR(buf, t, actor, "actor", 0);
        if (victim)
          ADD_UID_VAR(buf, t, victim, "victim", 0);
        if (object)
          ADD_UID_VAR(buf, t, object, "object", 0);
        if (target)
          ADD_UID_VAR(buf, t, target, "target", 0);
        if (str) {
          /* we're guaranteed to have a string ending with \r\n\0 */
          char *nstr = strdup(str), *fstr = nstr, *p = strchr(nstr, '\r');
          skip_spaces(&nstr);
          *p = '\0';
          add_var(&GET_TRIG_VARS(t), "arg", nstr, 0);
          free(fstr);
        }
        script_driver(&ch, t, MOB_TRIGGER, TRIG_NEW);
        break;
      }
    }
}

void fight_mtrigger(char_data *ch)
{
  struct char_data *actor;
  trig_data *t;
  char buf[MAX_INPUT_LENGTH];

  if (!SCRIPT_CHECK(ch, MTRIG_FIGHT) || !FIGHTING(ch) ||
      AFF_FLAGGED(ch, AFF_CHARM))
    return;

  for (t = TRIGGERS(SCRIPT(ch)); t; t = t->next) {
    if (TRIGGER_CHECK(t, MTRIG_FIGHT) &&
        (rand_number(1, 100) <= GET_TRIG_NARG(t))){
      actor = FIGHTING(ch);
      if (actor)
        ADD_UID_VAR(buf, t, actor, "actor", 0);
      else
        add_var(&GET_TRIG_VARS(t), "actor", "nobody", 0);

      script_driver(&ch, t, MOB_TRIGGER, TRIG_NEW);
      break;
    }
  }
}

void hitprcnt_mtrigger(char_data *ch)
{
  struct char_data *actor;
  trig_data *t;
  char buf[MAX_INPUT_LENGTH];

  if (!SCRIPT_CHECK(ch, MTRIG_HITPRCNT) || !FIGHTING(ch) ||
      AFF_FLAGGED(ch, AFF_CHARM))
    return;

  for (t = TRIGGERS(SCRIPT(ch)); t; t = t->next) {
    if (TRIGGER_CHECK(t, MTRIG_HITPRCNT) && GET_MAX_HIT(ch) &&
        (((GET_HIT(ch) * 100) / GET_MAX_HIT(ch)) <= GET_TRIG_NARG(t))) {

      actor = FIGHTING(ch);
      ADD_UID_VAR(buf, t, actor, "actor", 0);
      script_driver(&ch, t, MOB_TRIGGER, TRIG_NEW);
      break;
    }
  }
}

int receive_mtrigger(char_data *ch, char_data *actor, obj_data *obj)
{
  trig_data *t;
  char buf[MAX_INPUT_LENGTH];
  int ret_val;

  if (!SCRIPT_CHECK(ch, MTRIG_RECEIVE) || AFF_FLAGGED(ch, AFF_CHARM))
    return 1;

  for (t = TRIGGERS(SCRIPT(ch)); t; t = t->next) {
    if (TRIGGER_CHECK(t, MTRIG_RECEIVE) &&
        (rand_number(1, 100) <= GET_TRIG_NARG(t))){

      ADD_UID_VAR(buf, t, actor, "actor", 0);
      ADD_UID_VAR(buf, t, obj, "object", 0);
      ret_val = script_driver(&ch, t, MOB_TRIGGER, TRIG_NEW);
      if (DEAD(actor) || DEAD(ch) || obj->carried_by != actor)
        return 0;
      else
        return ret_val;
    }
  }

  return 1;
}

int death_mtrigger(char_data *ch, char_data *actor)
{
  trig_data *t;
  char buf[MAX_INPUT_LENGTH];

  if (!SCRIPT_CHECK(ch, MTRIG_DEATH) || AFF_FLAGGED(ch, AFF_CHARM))
    return 1;

  for (t = TRIGGERS(SCRIPT(ch)); t; t = t->next) {
    if (TRIGGER_CHECK(t, MTRIG_DEATH) &&
        (rand_number(1, 100) <= GET_TRIG_NARG(t))){
      if (actor)
        ADD_UID_VAR(buf, t, actor, "actor", 0);
      return script_driver(&ch, t, MOB_TRIGGER, TRIG_NEW);
    }
  }

  return 1;
}

void load_mtrigger(char_data *ch)
{
  trig_data *t;
  int result = 0;

  if (!SCRIPT_CHECK(ch, MTRIG_LOAD))
    return;

  for (t = TRIGGERS(SCRIPT(ch)); t; t = t->next) {
    if (TRIGGER_CHECK(t, MTRIG_LOAD) &&
        (rand_number(1, 100) <= GET_TRIG_NARG(t))) {
      result = script_driver(&ch, t, MOB_TRIGGER, TRIG_NEW);
      break;
    }
  }
  if (result == SCRIPT_ERROR_CODE) {
    /* we have recursed beyond reasonable depth */
    /* make sure this mob is the last one in the load chain */
    if (GET_MOB_RNUM(ch) != NOBODY) {
      free_proto_script(&mob_proto[GET_MOB_RNUM(ch)], MOB_TRIGGER);
    }
  }
}

int cast_mtrigger(char_data *actor, char_data *ch, int spellnum)
{
  trig_data *t;
  char buf[MAX_INPUT_LENGTH];

  if (ch == NULL)
    return 1;

  if (!SCRIPT_CHECK(ch, MTRIG_CAST) || AFF_FLAGGED(ch, AFF_CHARM))
    return 1;

  for (t = TRIGGERS(SCRIPT(ch)); t; t = t->next) {
    if (TRIGGER_CHECK(t, MTRIG_CAST) &&
        (rand_number(1, 100) <= GET_TRIG_NARG(t))) {
      ADD_UID_VAR(buf, t, actor, "actor", 0);
      sprintf(buf, "%d", spellnum);
      add_var(&GET_TRIG_VARS(t), "spell", buf, 0);
      add_var(&GET_TRIG_VARS(t), "spellname", (char*)skill_name(spellnum), 0);
      return script_driver(&ch, t, MOB_TRIGGER, TRIG_NEW);
    }
  }

  return 1;
}

int leave_mtrigger(char_data *actor, int dir)
{
  trig_data *t;
  char_data *ch;
  char buf[MAX_INPUT_LENGTH];

  if (!valid_dg_target(actor, DG_ALLOW_GODS))
    return 1;

  for (ch = world[IN_ROOM(actor)].people; ch; ch = ch->next_in_room) {
    if (!SCRIPT_CHECK(ch, MTRIG_LEAVE) ||
        !AWAKE(ch) || FIGHTING(ch) || (ch == actor) ||
        AFF_FLAGGED(ch, AFF_CHARM))
      continue;

    for (t = TRIGGERS(SCRIPT(ch)); t; t = t->next) {
      if ((IS_SET(GET_TRIG_TYPE(t), MTRIG_LEAVE) && CAN_SEE(ch, actor)) &&
          !GET_TRIG_DEPTH(t) && (rand_number(1, 100) <= GET_TRIG_NARG(t))) {
        if (dir>=0 && dir < NUM_OF_DIRS)
          add_var(&GET_TRIG_VARS(t), "direction", (char *)dirs[dir], 0);
        else
          add_var(&GET_TRIG_VARS(t), "direction", "none", 0);
        ADD_UID_VAR(buf, t, actor, "actor", 0);
        return script_driver(&ch, t, MOB_TRIGGER, TRIG_NEW);
      }
    }
  }
  return 1;
}

int door_mtrigger(char_data *actor, int subcmd, int dir)
{
  trig_data *t;
  char_data *ch;
  char buf[MAX_INPUT_LENGTH];

  for (ch = world[IN_ROOM(actor)].people; ch; ch = ch->next_in_room) {
    if (!SCRIPT_CHECK(ch, MTRIG_DOOR) ||
        !AWAKE(ch) || FIGHTING(ch) || (ch == actor) ||
        AFF_FLAGGED(ch, AFF_CHARM))
      continue;

    for (t = TRIGGERS(SCRIPT(ch)); t; t = t->next) {
      if (IS_SET(GET_TRIG_TYPE(t), MTRIG_DOOR) && CAN_SEE(ch, actor) &&
          !GET_TRIG_DEPTH(t) && (rand_number(1, 100) <= GET_TRIG_NARG(t))) {
        add_var(&GET_TRIG_VARS(t), "cmd", (char *)cmd_door[subcmd], 0);
        if (dir>=0 && dir < NUM_OF_DIRS)
          add_var(&GET_TRIG_VARS(t), "direction", (char *)dirs[dir], 0);
        else
          add_var(&GET_TRIG_VARS(t), "direction", "none", 0);
        ADD_UID_VAR(buf, t, actor, "actor", 0);
        return script_driver(&ch, t, MOB_TRIGGER, TRIG_NEW);
      }
    }
  }
  return 1;
}

void time_mtrigger(char_data *ch)
{
  trig_data *t;
  char buf[MAX_INPUT_LENGTH];

  /* This trigger is called if the hour is the same as specified in Narg. */
  if (!SCRIPT_CHECK(ch, MTRIG_TIME) || AFF_FLAGGED(ch, AFF_CHARM))
    return;

  for (t = TRIGGERS(SCRIPT(ch)); t; t = t->next) {
    if (TRIGGER_CHECK(t, MTRIG_TIME) &&
        (time_info.hours == GET_TRIG_NARG(t))) {
      sprintf(buf, "%d", time_info.hours);
      add_var(&GET_TRIG_VARS(t), "time", buf, 0);
      script_driver(&ch, t, MOB_TRIGGER, TRIG_NEW);
      break;
    }
  }
}

/* Object triggers. */
void random_otrigger(obj_data *obj)
{
  trig_data *t;

  if (!SCRIPT_CHECK(obj, OTRIG_RANDOM))
    return;

  for (t = TRIGGERS(SCRIPT(obj)); t; t = t->next) {
    if (TRIGGER_CHECK(t, OTRIG_RANDOM) &&
        (rand_number(1, 100) <= GET_TRIG_NARG(t))) {
      script_driver(&obj, t, OBJ_TRIGGER, TRIG_NEW);
      break;
    }
  }
}

void timer_otrigger(struct obj_data *obj)
{
  trig_data *t;

  if (!SCRIPT_CHECK(obj, OTRIG_TIMER))
    return;

  for (t = TRIGGERS(SCRIPT(obj)); t; t = t->next) {
    if (TRIGGER_CHECK(t, OTRIG_TIMER)) {
      script_driver(&obj, t, OBJ_TRIGGER, TRIG_NEW);
    }
  }

  return;
}

int get_otrigger(obj_data *obj, char_data *actor)
{
  trig_data *t;
  char buf[MAX_INPUT_LENGTH];
  int ret_val;
  if (!SCRIPT_CHECK(obj, OTRIG_GET))
    return 1;

  for (t = TRIGGERS(SCRIPT(obj)); t; t = t->next) {
    if (TRIGGER_CHECK(t, OTRIG_GET) && (rand_number(1, 100) <= GET_TRIG_NARG(t))) {
      ADD_UID_VAR(buf, t, actor, "actor", 0);
      ret_val = script_driver(&obj, t, OBJ_TRIGGER, TRIG_NEW);
      /* don't allow a get to take place, if
       * a) the actor is killed (the mud would choke on obj_to_char).
       * b) the object is purged.
       */
      if (DEAD(actor) || !obj)
        return 0;
      else
        return ret_val;
    }
  }

  return 1;
}

/* checks for command trigger on specific object. assumes obj has cmd trig */
int cmd_otrig(obj_data *obj, char_data *actor, char *cmd,
              char *argument, int type)
{
  trig_data *t;
  char buf[MAX_INPUT_LENGTH];

  if (obj && SCRIPT_CHECK(obj, OTRIG_COMMAND))
    for (t = TRIGGERS(SCRIPT(obj)); t; t = t->next) {
      if (!TRIGGER_CHECK(t, OTRIG_COMMAND))
        continue;

      if (IS_SET(GET_TRIG_NARG(t), type) &&
          (!GET_TRIG_ARG(t) || !*GET_TRIG_ARG(t))) {
        mudlog(NRM, LVL_BUILDER, TRUE, "SYSERR: O-Command Trigger #%d has no text argument!",
          GET_TRIG_VNUM(t));
        continue;
      }

      if (IS_SET(GET_TRIG_NARG(t), type) &&
          (*GET_TRIG_ARG(t)=='*' ||
          !strn_cmp(GET_TRIG_ARG(t), cmd, strlen(GET_TRIG_ARG(t))))) {

        ADD_UID_VAR(buf, t, actor, "actor", 0);
        skip_spaces(&argument);
        add_var(&GET_TRIG_VARS(t), "arg", argument, 0);
        skip_spaces(&cmd);
        add_var(&GET_TRIG_VARS(t), "cmd", cmd, 0);

        if (script_driver(&obj, t, OBJ_TRIGGER, TRIG_NEW))
          return 1;
      }
    }

  return 0;
}

int command_otrigger(char_data *actor, char *cmd, char *argument)
{
  obj_data *obj;
  int i;

  /* prevent people we like from becoming trapped :P */
  if (!valid_dg_target(actor, 0))
    return 0;

  for (i = 0; i < NUM_WEARS; i++)
    if (GET_EQ(actor, i))
      if (cmd_otrig(GET_EQ(actor, i), actor, cmd, argument, OCMD_EQUIP))
        return 1;

  for (obj = actor->carrying; obj; obj = obj->next_content)
    if (cmd_otrig(obj, actor, cmd, argument, OCMD_INVEN))
      return 1;

  for (obj = world[IN_ROOM(actor)].contents; obj; obj = obj->next_content)
    if (cmd_otrig(obj, actor, cmd, argument, OCMD_ROOM))
      return 1;

  return 0;
}

int wear_otrigger(obj_data *obj, char_data *actor, int where)
{
  trig_data *t;
  char buf[MAX_INPUT_LENGTH];
  int ret_val;

  if (!SCRIPT_CHECK(obj, OTRIG_WEAR))
    return 1;

  for (t = TRIGGERS(SCRIPT(obj)); t; t = t->next) {
    if (TRIGGER_CHECK(t, OTRIG_WEAR)) {
      ADD_UID_VAR(buf, t, actor, "actor", 0);
      ret_val = script_driver(&obj, t, OBJ_TRIGGER, TRIG_NEW);
      /* don't allow a wear to take place, if
       * the object is purged.
       */
      if (!obj)
        return 0;
      else
        return ret_val;
    }
  }

  return 1;
}

int remove_otrigger(obj_data *obj, char_data *actor)
{
  trig_data *t;
  char buf[MAX_INPUT_LENGTH];
  int ret_val;

  if (!SCRIPT_CHECK(obj, OTRIG_REMOVE))
    return 1;

  for (t = TRIGGERS(SCRIPT(obj)); t; t = t->next) {
    if (TRIGGER_CHECK(t, OTRIG_REMOVE)) {
      ADD_UID_VAR(buf, t, actor, "actor", 0);
      ret_val = script_driver(&obj, t, OBJ_TRIGGER, TRIG_NEW);
      /* don't allow a remove to take place, if
       * the object is purged.
       */
      if (!obj)
        return 0;
      else
        return ret_val;
    }
  }

  return 1;
}

int drop_otrigger(obj_data *obj, char_data *actor)
{
  trig_data *t;
  char buf[MAX_INPUT_LENGTH];
  int ret_val;

  if (!SCRIPT_CHECK(obj, OTRIG_DROP))
    return 1;

  for (t = TRIGGERS(SCRIPT(obj)); t; t = t->next) {
    if (TRIGGER_CHECK(t, OTRIG_DROP) && (rand_number(1, 100) <= GET_TRIG_NARG(t))) {
      ADD_UID_VAR(buf, t, actor, "actor", 0);
      ret_val = script_driver(&obj, t, OBJ_TRIGGER, TRIG_NEW);
      /* don't allow a drop to take place, if
       * the object is purged (nothing to drop).
       */
      if (!obj)
        return 0;
      else
        return ret_val;
    }
  }

  return 1;
}

int give_otrigger(obj_data *obj, char_data *actor, char_data *victim)
{
  trig_data *t;
  char buf[MAX_INPUT_LENGTH];
  int ret_val;

  if (!SCRIPT_CHECK(obj, OTRIG_GIVE))
    return 1;

  for (t = TRIGGERS(SCRIPT(obj)); t; t = t->next) {
    if (TRIGGER_CHECK(t, OTRIG_GIVE) && (rand_number(1, 100) <= GET_TRIG_NARG(t))) {
      ADD_UID_VAR(buf, t, actor, "actor", 0);
      ADD_UID_VAR(buf, t, victim, "victim", 0);
      ret_val = script_driver(&obj, t, OBJ_TRIGGER, TRIG_NEW);
      /* don't allow a give to take place, if
       * a) the object is purged.
       * b) the object is not carried by the giver.
       */
      if (!obj || obj->carried_by != actor)
        return 0;
      else
        return ret_val;
    }
  }

  return 1;
}

void load_otrigger(obj_data *obj)
{
  trig_data *t;
  int result = 0;

  if (!SCRIPT_CHECK(obj, OTRIG_LOAD))
    return;

  for (t = TRIGGERS(SCRIPT(obj)); t; t = t->next) {
    if (TRIGGER_CHECK(t, OTRIG_LOAD) &&
        (rand_number(1, 100) <= GET_TRIG_NARG(t))) {
      result = script_driver(&obj, t, OBJ_TRIGGER, TRIG_NEW);
      break;
    }
  }
  if (result == SCRIPT_ERROR_CODE) {
    /* we have recursed beyond reasonable depth */
    /* make sure this mob is the last one in the load chain */
    if (GET_OBJ_RNUM(obj) != NOTHING) {
      free_proto_script(&obj_proto[GET_OBJ_RNUM(obj)], OBJ_TRIGGER);
    }
  }
}

int cast_otrigger(char_data *actor, obj_data *obj, int spellnum)
{
  trig_data *t;
  char buf[MAX_INPUT_LENGTH];

  if (obj == NULL)
    return 1;

  if (!SCRIPT_CHECK(obj, OTRIG_CAST))
    return 1;

  for (t = TRIGGERS(SCRIPT(obj)); t; t = t->next) {
    if (TRIGGER_CHECK(t, OTRIG_CAST) &&
        (rand_number(1, 100) <= GET_TRIG_NARG(t))) {
      ADD_UID_VAR(buf, t, actor, "actor", 0);
      sprintf(buf, "%d", spellnum);
      add_var(&GET_TRIG_VARS(t), "spell", buf, 0);
      add_var(&GET_TRIG_VARS(t), "spellname", (char *)skill_name(spellnum), 0);
      return script_driver(&obj, t, OBJ_TRIGGER, TRIG_NEW);
    }
  }

  return 1;
}

int leave_otrigger(room_data *room, char_data *actor, int dir)
{
  trig_data *t;
  char buf[MAX_INPUT_LENGTH];
  int temp, final = 1;
  obj_data *obj, *obj_next;

  if (!valid_dg_target(actor, DG_ALLOW_GODS))
    return 1;

  for (obj = room->contents; obj; obj = obj_next) {
    obj_next = obj->next_content;
    if (!SCRIPT_CHECK(obj, OTRIG_LEAVE))
      continue;

    for (t = TRIGGERS(SCRIPT(obj)); t; t = t->next) {
      if (TRIGGER_CHECK(t, OTRIG_LEAVE) &&
          (rand_number(1, 100) <= GET_TRIG_NARG(t))) {
        if (dir>=0 && dir < NUM_OF_DIRS)
          add_var(&GET_TRIG_VARS(t), "direction", (char *)dirs[dir], 0);
        else
          add_var(&GET_TRIG_VARS(t), "direction", "none", 0);
        ADD_UID_VAR(buf, t, actor, "actor", 0);
        temp = script_driver(&obj, t, OBJ_TRIGGER, TRIG_NEW);
        if (temp == 0)
          final = 0;
      }
    }
  }

  return final;
}

int consume_otrigger(obj_data *obj, char_data *actor, int cmd)
{
  trig_data *t;
  char buf[MAX_INPUT_LENGTH];
  int ret_val;

  if (!SCRIPT_CHECK(obj, OTRIG_CONSUME))
    return 1;

  for (t = TRIGGERS(SCRIPT(obj)); t; t = t->next) {
    if (TRIGGER_CHECK(t, OTRIG_CONSUME)) {
      ADD_UID_VAR(buf, t, actor, "actor", 0);
      switch (cmd) {
              case OCMD_EAT:
                add_var(&GET_TRIG_VARS(t), "command", "eat", 0);
                break;
              case OCMD_DRINK:
                add_var(&GET_TRIG_VARS(t), "command", "drink", 0);
                break;
        case OCMD_QUAFF:
          add_var(&GET_TRIG_VARS(t), "command", "quaff", 0);
          break;
      }
      ret_val = script_driver(&obj, t, OBJ_TRIGGER, TRIG_NEW);
      /* don't allow a wear to take place, if
       * the object is purged.
       */
      if (!obj)
        return 0;
      else
        return ret_val;
    }
  }

  return 1;
}

void time_otrigger(obj_data *obj)
{
  trig_data *t;
  char buf[MAX_INPUT_LENGTH];

  if (!SCRIPT_CHECK(obj, OTRIG_TIME))
    return;

  for (t = TRIGGERS(SCRIPT(obj)); t; t = t->next) {
    if (TRIGGER_CHECK(t, OTRIG_TIME) &&
        (time_info.hours == GET_TRIG_NARG(t))) {
      sprintf(buf, "%d", time_info.hours);
      add_var(&GET_TRIG_VARS(t), "time", buf, 0);
      script_driver(&obj, t, OBJ_TRIGGER, TRIG_NEW);
      break;
    }
  }
}

/* World triggers. */
void reset_wtrigger(struct room_data *room)
{
  trig_data *t;

  if (!SCRIPT_CHECK(room, WTRIG_RESET))
    return;

  for (t = TRIGGERS(SCRIPT(room)); t; t = t->next) {
    if (TRIGGER_CHECK(t, WTRIG_RESET) &&
        (rand_number(1, 100) <= GET_TRIG_NARG(t))) {
      script_driver(&room, t, WLD_TRIGGER, TRIG_NEW);
      break;
    }
  }
}

void random_wtrigger(struct room_data *room)
{
  trig_data *t;

  if (!SCRIPT_CHECK(room, WTRIG_RANDOM))
    return;

  for (t = TRIGGERS(SCRIPT(room)); t; t = t->next) {
    if (TRIGGER_CHECK(t, WTRIG_RANDOM) &&
        (rand_number(1, 100) <= GET_TRIG_NARG(t))) {
      script_driver(&room, t, WLD_TRIGGER, TRIG_NEW);
      break;
    }
  }
}

int enter_wtrigger(struct room_data *room, char_data *actor, int dir)
{
  trig_data *t;
  char buf[MAX_INPUT_LENGTH];

  if (!SCRIPT_CHECK(room, WTRIG_ENTER))
    return 1;

  for (t = TRIGGERS(SCRIPT(room)); t; t = t->next) {
    if (TRIGGER_CHECK(t, WTRIG_ENTER) &&
        (rand_number(1, 100) <= GET_TRIG_NARG(t))) {
      if (dir>=0 && dir < NUM_OF_DIRS)
        add_var(&GET_TRIG_VARS(t), "direction", (char *)dirs[rev_dir[dir]], 0);
      else
        add_var(&GET_TRIG_VARS(t), "direction", "none", 0);
      ADD_UID_VAR(buf, t, actor, "actor", 0);
      return script_driver(&room, t, WLD_TRIGGER, TRIG_NEW);
    }
  }

  return 1;
}

int command_wtrigger(char_data *actor, char *cmd, char *argument)
{
  struct room_data *room;
  trig_data *t;
  char buf[MAX_INPUT_LENGTH];

  if (!actor || !SCRIPT_CHECK(&world[IN_ROOM(actor)], WTRIG_COMMAND))
    return 0;

  /* prevent people we like from becoming trapped :P */
  if (!valid_dg_target(actor, 0))
    return 0;

  room = &world[IN_ROOM(actor)];
  for (t = TRIGGERS(SCRIPT(room)); t; t = t->next) {
    if (!TRIGGER_CHECK(t, WTRIG_COMMAND))
      continue;

    if (!GET_TRIG_ARG(t) || !*GET_TRIG_ARG(t)) {
      mudlog(NRM, LVL_BUILDER, TRUE, "SYSERR: W-Command Trigger #%d has no text argument!",
        GET_TRIG_VNUM(t));
      continue;
    }

    if (*GET_TRIG_ARG(t)=='*' ||
        !strn_cmp(GET_TRIG_ARG(t), cmd, strlen(GET_TRIG_ARG(t)))) {
      ADD_UID_VAR(buf, t, actor, "actor", 0);
      skip_spaces(&argument);
      add_var(&GET_TRIG_VARS(t), "arg", argument, 0);
      skip_spaces(&cmd);
      add_var(&GET_TRIG_VARS(t), "cmd", cmd, 0);

      return script_driver(&room, t, WLD_TRIGGER, TRIG_NEW);
    }
  }

  return 0;
}

void speech_wtrigger(char_data *actor, char *str)
{
  struct room_data *room;
  trig_data *t;
  char buf[MAX_INPUT_LENGTH];

  if (!actor || !SCRIPT_CHECK(&world[IN_ROOM(actor)], WTRIG_SPEECH))
    return;

  room = &world[IN_ROOM(actor)];
  for (t = TRIGGERS(SCRIPT(room)); t; t = t->next) {
    if (!TRIGGER_CHECK(t, WTRIG_SPEECH))
      continue;

    if (!GET_TRIG_ARG(t) || !*GET_TRIG_ARG(t)) {
      mudlog(NRM, LVL_BUILDER, TRUE, "SYSERR: W-Speech Trigger #%d has no text argument!",
        GET_TRIG_VNUM(t));
      continue;
    }

    if (*GET_TRIG_ARG(t)=='*' ||
       (GET_TRIG_NARG(t) && word_check(str, GET_TRIG_ARG(t))) ||
       (!GET_TRIG_NARG(t) && is_substring(GET_TRIG_ARG(t), str))) {
      ADD_UID_VAR(buf, t, actor, "actor", 0);
      add_var(&GET_TRIG_VARS(t), "speech", str, 0);
      script_driver(&room, t, WLD_TRIGGER, TRIG_NEW);
      break;
    }
  }
}

int drop_wtrigger(obj_data *obj, char_data *actor)
{
  struct room_data *room;
  trig_data *t;
  char buf[MAX_INPUT_LENGTH];
  int ret_val;

  if (!actor || !SCRIPT_CHECK(&world[IN_ROOM(actor)], WTRIG_DROP))
    return 1;

  room = &world[IN_ROOM(actor)];
  for (t = TRIGGERS(SCRIPT(room)); t; t = t->next)
    if (TRIGGER_CHECK(t, WTRIG_DROP) &&
        (rand_number(1, 100) <= GET_TRIG_NARG(t))) {
      ADD_UID_VAR(buf, t, actor, "actor", 0);
      ADD_UID_VAR(buf, t, obj, "object", 0);
      ret_val = script_driver(&room, t, WLD_TRIGGER, TRIG_NEW);
      if (obj->carried_by != actor)
        return 0;
      else
        return ret_val;
      break;
    }

  return 1;
}

int cast_wtrigger(char_data *actor, char_data *vict, obj_data *obj, int spellnum)
{
  room_data *room;
  trig_data *t;
  char buf[MAX_INPUT_LENGTH];

  if (!actor || !SCRIPT_CHECK(&world[IN_ROOM(actor)], WTRIG_CAST))
    return 1;

  room = &world[IN_ROOM(actor)];
  for (t = TRIGGERS(SCRIPT(room)); t; t = t->next) {
    if (TRIGGER_CHECK(t, WTRIG_CAST) &&
        (rand_number(1, 100) <= GET_TRIG_NARG(t))) {

      ADD_UID_VAR(buf, t, actor, "actor", 0);
      if (vict)
        ADD_UID_VAR(buf, t, vict, "victim", 0);
      if (obj)
        ADD_UID_VAR(buf, t, obj, "object", 0);
      sprintf(buf, "%d", spellnum);
      add_var(&GET_TRIG_VARS(t), "spell", buf, 0);
      add_var(&GET_TRIG_VARS(t), "spellname", (char *)skill_name(spellnum), 0);
      return script_driver(&room, t, WLD_TRIGGER, TRIG_NEW);
    }
  }

  return 1;
}

int leave_wtrigger(struct room_data *room, char_data *actor, int dir)
{
  trig_data *t;
  char buf[MAX_INPUT_LENGTH];

  if (!valid_dg_target(actor, DG_ALLOW_GODS))
    return 1;

  if (!SCRIPT_CHECK(room, WTRIG_LEAVE))
    return 1;

  for (t = TRIGGERS(SCRIPT(room)); t; t = t->next) {
    if (TRIGGER_CHECK(t, WTRIG_LEAVE) &&
        (rand_number(1, 100) <= GET_TRIG_NARG(t))) {
      if (dir>=0 && dir < NUM_OF_DIRS)
        add_var(&GET_TRIG_VARS(t), "direction", (char *)dirs[dir], 0);
      else
        add_var(&GET_TRIG_VARS(t), "direction", "none", 0);
      ADD_UID_VAR(buf, t, actor, "actor", 0);
      return script_driver(&room, t, WLD_TRIGGER, TRIG_NEW);
    }
  }

  return 1;
}

int door_wtrigger(char_data *actor, int subcmd, int dir)
{
  room_data *room;
  trig_data *t;
  char buf[MAX_INPUT_LENGTH];

  if (!actor || !SCRIPT_CHECK(&world[IN_ROOM(actor)], WTRIG_DOOR))
    return 1;

  room = &world[IN_ROOM(actor)];
  for (t = TRIGGERS(SCRIPT(room)); t; t = t->next) {
    if (TRIGGER_CHECK(t, WTRIG_DOOR) &&
        (rand_number(1, 100) <= GET_TRIG_NARG(t))) {
      add_var(&GET_TRIG_VARS(t), "cmd", (char *)cmd_door[subcmd], 0);
      if (dir>=0 && dir < NUM_OF_DIRS)
        add_var(&GET_TRIG_VARS(t), "direction", (char *)dirs[dir], 0);
      else
        add_var(&GET_TRIG_VARS(t), "direction", "none", 0);
      ADD_UID_VAR(buf, t, actor, "actor", 0);
      return script_driver(&room, t, WLD_TRIGGER, TRIG_NEW);
    }
  }

  return 1;
}

void time_wtrigger(struct room_data *room)
{
  trig_data *t;
  char buf[MAX_INPUT_LENGTH];

  if (!SCRIPT_CHECK(room, WTRIG_TIME))
    return;

  for (t = TRIGGERS(SCRIPT(room)); t; t = t->next) {
    if (TRIGGER_CHECK(t, WTRIG_TIME) &&
        (time_info.hours == GET_TRIG_NARG(t))) {
      sprintf(buf, "%d", time_info.hours);
      add_var(&GET_TRIG_VARS(t), "time", buf, 0);
      script_driver(&room, t, WLD_TRIGGER, TRIG_NEW);
      break;
    }
  }
}