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Source:NetHack 3.4.0/pager.c

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Below is the full text to pager.c from the source code of NetHack 3.4.0. To link to a particular line, write [[NetHack 3.4.0/pager.c#line123]], for example.

Warning! This is the source code from an old release. For the latest release, see Source code

The NetHack General Public License applies to screenshots, source code and other content from NetHack.
1.    /*	SCCS Id: @(#)pager.c	3.4	2002/01/17	*/
2.    /* Copyright (c) Stichting Mathematisch Centrum, Amsterdam, 1985. */
3.    /* NetHack may be freely redistributed.  See license for details. */
4.    
5.    /* This file contains the command routines dowhatis() and dohelp() and */
6.    /* a few other help related facilities */
7.    
8.    #include "hack.h"
9.    #include "dlb.h"
10.   
11.   STATIC_DCL boolean FDECL(is_swallow_sym, (int));
12.   STATIC_DCL int FDECL(append_str, (char *, const char *));
13.   STATIC_DCL struct permonst * FDECL(lookat, (int, int, char *, char *));
14.   STATIC_DCL void FDECL(checkfile,
15.   		      (char *,struct permonst *,BOOLEAN_P,BOOLEAN_P));
16.   STATIC_DCL int FDECL(do_look, (BOOLEAN_P));
17.   STATIC_DCL boolean FDECL(help_menu, (int *));
18.   #ifdef PORT_HELP
19.   extern void NDECL(port_help);
20.   #endif
21.   
22.   /* Returns "true" for characters that could represent a monster's stomach. */
23.   STATIC_OVL boolean
24.   is_swallow_sym(c)
25.   int c;
26.   {
27.       int i;
28.       for (i = S_sw_tl; i <= S_sw_br; i++)
29.   	if ((int)showsyms[i] == c) return TRUE;
30.       return FALSE;
31.   }
32.   
33.   /*
34.    * Append new_str to the end of buf if new_str doesn't already exist as
35.    * a substring of buf.  Return 1 if the string was appended, 0 otherwise.
36.    * It is expected that buf is of size BUFSZ.
37.    */
38.   STATIC_OVL int
39.   append_str(buf, new_str)
40.       char *buf;
41.       const char *new_str;
42.   {
43.       int space_left;	/* space remaining in buf */
44.   
45.       if (strstri(buf, new_str)) return 0;
46.   
47.       space_left = BUFSZ - strlen(buf) - 1;
48.       (void) strncat(buf, " or ", space_left);
49.       (void) strncat(buf, new_str, space_left - 4);
50.       return 1;
51.   }
52.   
53.   /*
54.    * Return the name of the glyph found at (x,y).
55.    * If not hallucinating and the glyph is a monster, also monster data.
56.    */
57.   STATIC_OVL struct permonst *
58.   lookat(x, y, buf, monbuf)
59.       int x, y;
60.       char *buf, *monbuf;
61.   {
62.       register struct monst *mtmp = (struct monst *) 0;
63.       struct permonst *pm = (struct permonst *) 0;
64.       int glyph;
65.   
66.       buf[0] = monbuf[0] = 0;
67.       glyph = glyph_at(x,y);
68.       if (u.ux == x && u.uy == y && canseeself()) {
69.   	char race[QBUFSZ];
70.   
71.   	/* if not polymorphed, show both the role and the race */
72.   	race[0] = 0;
73.   	if (!Upolyd) {
74.   	    Sprintf(race, "%s ", urace.adj);
75.   	}
76.   
77.   	Sprintf(buf, "%s%s%s called %s",
78.   		Invis ? "invisible " : "",
79.   		race,
80.   		mons[u.umonnum].mname,
81.   		plname);
82.   
83.   #ifdef STEED
84.   	if (u.usteed) {
85.   	    char steedbuf[BUFSZ];
86.   
87.   	    Sprintf(steedbuf, ", mounted on %s", y_monnam(u.usteed));
88.   	    /* assert((sizeof buf >= strlen(buf)+strlen(steedbuf)+1); */
89.   	    Strcat(buf, steedbuf);
90.   	}
91.   #endif
92.       } else if (u.uswallow) {
93.   	/* all locations when swallowed other than the hero are the monster */
94.   	Sprintf(buf, "interior of %s",
95.   				    Blind ? "a monster" : a_monnam(u.ustuck));
96.   	pm = u.ustuck->data;
97.       } else if (glyph_is_monster(glyph)) {
98.   	bhitpos.x = x;
99.   	bhitpos.y = y;
100.  	mtmp = m_at(x,y);
101.  	if (mtmp != (struct monst *) 0) {
102.  	    char *name, monnambuf[BUFSZ];
103.  	    boolean accurate = !Hallucination;
104.  
105.  	    if (mtmp->data == &mons[PM_COYOTE] && accurate)
106.  		name = coyotename(mtmp, monnambuf);
107.  	    else
108.  		name = distant_monnam(mtmp, ARTICLE_NONE, monnambuf);
109.  
110.  	    pm = mtmp->data;
111.  	    Sprintf(buf, "%s%s%s",
112.  		    (mtmp->mx != x || mtmp->my != y) ?
113.  			((mtmp->isshk && accurate)
114.  				? "tail of " : "tail of a ") : "",
115.  		    (mtmp->mtame && accurate) ? "tame " :
116.  		    (mtmp->mpeaceful && accurate) ? "peaceful " : "",
117.  		    name);
118.  	    if (u.ustuck == mtmp)
119.  		Strcat(buf, (Upolyd && sticks(youmonst.data)) ?
120.  			", being held" : ", holding you");
121.  	    if (mtmp->mleashed)
122.  		Strcat(buf, ", leashed to you");
123.  
124.  	    {
125.  		int ways_seen = 0, normal = 0, xraydist;
126.  		boolean useemon = (boolean) canseemon(mtmp);
127.  
128.  		xraydist = (u.xray_range<0) ? -1 : u.xray_range * u.xray_range;
129.  		/* normal vision */
130.  		if ((mtmp->wormno ? worm_known(mtmp) : cansee(mtmp->mx, mtmp->my)) &&
131.  			mon_visible(mtmp) && !mtmp->minvis) {
132.  		    ways_seen++;
133.  		    normal++;
134.  		}
135.  		/* see invisible */
136.  		if (useemon && mtmp->minvis)
137.  		    ways_seen++;
138.  		/* infravision */
139.  		if ((!mtmp->minvis || See_invisible) && see_with_infrared(mtmp))
140.  		    ways_seen++;
141.  		/* telepathy */
142.  		if (tp_sensemon(mtmp))
143.  		    ways_seen++;
144.  		/* xray */
145.  		if (useemon && xraydist > 0 &&
146.  			distu(mtmp->mx, mtmp->my) <= xraydist)
147.  		    ways_seen++;
148.  		if (Detect_monsters)
149.  		    ways_seen++;
150.  		if (MATCH_WARN_OF_MON(mtmp))
151.  		    ways_seen++;
152.  
153.  		if (ways_seen > 1 || !normal) {
154.  		    if (normal) {
155.  			Strcat(monbuf, "normal vision");
156.  			/* can't actually be 1 yet here */
157.  			if (ways_seen-- > 1) Strcat(monbuf, ", ");
158.  		    }
159.  		    if (useemon && mtmp->minvis) {
160.  			Strcat(monbuf, "see invisible");
161.  			if (ways_seen-- > 1) Strcat(monbuf, ", ");
162.  		    }
163.  		    if ((!mtmp->minvis || See_invisible) &&
164.  			    see_with_infrared(mtmp)) {
165.  			Strcat(monbuf, "infravision");
166.  			if (ways_seen-- > 1) Strcat(monbuf, ", ");
167.  		    }
168.  		    if (tp_sensemon(mtmp)) {
169.  			Strcat(monbuf, "telepathy");
170.  			if (ways_seen-- > 1) Strcat(monbuf, ", ");
171.  		    }
172.  		    if (useemon && xraydist > 0 &&
173.  			    distu(mtmp->mx, mtmp->my) <= xraydist) {
174.  			/* Eyes of the Overworld */
175.  			Strcat(monbuf, "astral vision");
176.  			if (ways_seen-- > 1) Strcat(monbuf, ", ");
177.  		    }
178.  		    if (Detect_monsters) {
179.  			Strcat(monbuf, "monster detection");
180.  			if (ways_seen-- > 1) Strcat(monbuf, ", ");
181.  		    }
182.  		    if (MATCH_WARN_OF_MON(mtmp)) {
183.  		    	char wbuf[BUFSZ];
184.  			if (Hallucination)
185.  				Strcat(monbuf, "paranoid delusion");
186.  			else {
187.  				Sprintf(wbuf, "warned of %s",
188.  					makeplural(mtmp->data->mname));
189.  		    		Strcat(monbuf, wbuf);
190.  		    	}
191.  		    	if (ways_seen-- > 1) Strcat(monbuf, ", ");
192.  		    }
193.  		}
194.  	    }
195.  	}
196.      }
197.      else if (glyph_is_object(glyph)) {
198.  	struct obj *otmp = vobj_at(x,y);
199.  
200.  	if (!otmp || otmp->otyp != glyph_to_obj(glyph)) {
201.  	    if (glyph_to_obj(glyph) != STRANGE_OBJECT) {
202.  		otmp = mksobj(glyph_to_obj(glyph), FALSE, FALSE);
203.  		if (otmp->oclass == GOLD_CLASS)
204.  		    otmp->quan = 2L; /* to force pluralization */
205.  		else if (otmp->otyp == SLIME_MOLD)
206.  		    otmp->spe = current_fruit;	/* give the fruit a type */
207.  		Strcpy(buf, distant_name(otmp, xname));
208.  		dealloc_obj(otmp);
209.  	    }
210.  	} else
211.  	    Strcpy(buf, distant_name(otmp, xname));
212.  
213.  	if (levl[x][y].typ == STONE || levl[x][y].typ == SCORR)
214.  	    Strcat(buf, " embedded in stone");
215.  	else if (IS_WALL(levl[x][y].typ) || levl[x][y].typ == SDOOR)
216.  	    Strcat(buf, " embedded in a wall");
217.  	else if (closed_door(x,y))
218.  	    Strcat(buf, " embedded in a door");
219.  	else if (is_pool(x,y))
220.  	    Strcat(buf, " in water");
221.  	else if (is_lava(x,y))
222.  	    Strcat(buf, " in molten lava");	/* [can this ever happen?] */
223.      } else if (glyph_is_trap(glyph)) {
224.  	int tnum = what_trap(glyph_to_trap(glyph));
225.  	Strcpy(buf, defsyms[trap_to_defsym(tnum)].explanation);
226.      } else if(!glyph_is_cmap(glyph)) {
227.  	Strcpy(buf,"dark part of a room");
228.      } else switch(glyph_to_cmap(glyph)) {
229.      case S_altar:
230.  	if(!In_endgame(&u.uz))
231.  	    Sprintf(buf, "%s altar",
232.  		align_str(Amask2align(levl[x][y].altarmask & ~AM_SHRINE)));
233.  	else Sprintf(buf, "aligned altar");
234.  	break;
235.      case S_ndoor:
236.  	if (is_drawbridge_wall(x, y) >= 0)
237.  	    Strcpy(buf,"open drawbridge portcullis");
238.  	else if ((levl[x][y].doormask & ~D_TRAPPED) == D_BROKEN)
239.  	    Strcpy(buf,"broken door");
240.  	else
241.  	    Strcpy(buf,"doorway");
242.  	break;
243.      case S_cloud:
244.  	Strcpy(buf, Is_airlevel(&u.uz) ? "cloudy area" : "fog/vapor cloud");
245.  	break;
246.      default:
247.  	Strcpy(buf,defsyms[glyph_to_cmap(glyph)].explanation);
248.  	break;
249.      }
250.  
251.      return ((pm && !Hallucination) ? pm : (struct permonst *) 0);
252.  }
253.  
254.  /*
255.   * Look in the "data" file for more info.  Called if the user typed in the
256.   * whole name (user_typed_name == TRUE), or we've found a possible match
257.   * with a character/glyph and flags.help is TRUE.
258.   *
259.   * NOTE: when (user_typed_name == FALSE), inp is considered read-only and
260.   *	 must not be changed directly, e.g. via lcase(). We want to force
261.   *	 lcase() for data.base lookup so that we can have a clean key.
262.   *	 Therefore, we create a copy of inp _just_ for data.base lookup.
263.   */
264.  STATIC_OVL void
265.  checkfile(inp, pm, user_typed_name, without_asking)
266.      char *inp;
267.      struct permonst *pm;
268.      boolean user_typed_name, without_asking;
269.  {
270.      dlb *fp;
271.      char buf[BUFSZ], newstr[BUFSZ];
272.      char *ep, *dbase_str;
273.      long txt_offset;
274.      int chk_skip;
275.      boolean found_in_file = FALSE, skipping_entry = FALSE;
276.  
277.      fp = dlb_fopen(DATAFILE, "r");
278.      if (!fp) {
279.  	pline("Cannot open data file!");
280.  	return;
281.      }
282.  
283.      /* To prevent the need for entries in data.base like *ngel to account
284.       * for Angel and angel, make the lookup string the same for both
285.       * user_typed_name and picked name.
286.       */
287.      if (pm != (struct permonst *) 0 && !user_typed_name)
288.  	dbase_str = strcpy(newstr, pm->mname);
289.      else dbase_str = strcpy(newstr, inp);
290.      (void) lcase(dbase_str);
291.  
292.      if (!strncmp(dbase_str, "interior of ", 12))
293.  	dbase_str += 12;
294.      if (!strncmp(dbase_str, "a ", 2))
295.  	dbase_str += 2;
296.      else if (!strncmp(dbase_str, "an ", 3))
297.  	dbase_str += 3;
298.      else if (!strncmp(dbase_str, "the ", 4))
299.  	dbase_str += 4;
300.      if (!strncmp(dbase_str, "tame ", 5))
301.  	dbase_str += 5;
302.      else if (!strncmp(dbase_str, "peaceful ", 9))
303.  	dbase_str += 9;
304.      if (!strncmp(dbase_str, "invisible ", 10))
305.  	dbase_str += 10;
306.      if (!strncmp(dbase_str, "statue of ", 10))
307.  	dbase_str[6] = '\0';
308.      else if (!strncmp(dbase_str, "figurine of ", 12))
309.  	dbase_str[8] = '\0';
310.  
311.      /* Make sure the name is non-empty. */
312.      if (*dbase_str) {
313.  	/* adjust the input to remove "named " and convert to lower case */
314.  	char *alt = 0;	/* alternate description */
315.  	if ((ep = strstri(dbase_str, " named ")) != 0)
316.  	    alt = ep + 7;
317.  	else
318.  	    ep = strstri(dbase_str, " called ");
319.  	if (ep) *ep = '\0';
320.  	else if ((ep = strstri(dbase_str, ", ")) != 0) *ep = '\0';
321.  
322.  	/*
323.  	 * If the object is named, then the name is the alternate description;
324.  	 * otherwise, the result of makesingular() applied to the name is. This
325.  	 * isn't strictly optimal, but named objects of interest to the user
326.  	 * will usually be found under their name, rather than under their
327.  	 * object type, so looking for a singular form is pointless.
328.  	 */
329.  
330.  	if (!alt)
331.  	    alt = makesingular(dbase_str);
332.  	else
333.  	    if (user_typed_name)
334.  		(void) lcase(alt);
335.  
336.  	/* skip first record; read second */
337.  	txt_offset = 0L;
338.  	if (!dlb_fgets(buf, BUFSZ, fp) || !dlb_fgets(buf, BUFSZ, fp)) {
339.  	    impossible("can't read 'data' file");
340.  	    (void) dlb_fclose(fp);
341.  	    return;
342.  	} else if (sscanf(buf, "%8lx\n", &txt_offset) < 1 || txt_offset <= 0)
343.  	    goto bad_data_file;
344.  
345.  	/* look for the appropriate entry */
346.  	while (dlb_fgets(buf,BUFSZ,fp)) {
347.  	    if (*buf == '.') break;  /* we passed last entry without success */
348.  
349.  	    if (digit(*buf)) {
350.  		/* a number indicates the end of current entry */
351.  		skipping_entry = FALSE;
352.  	    } else if (!skipping_entry) {
353.  		if (!(ep = index(buf, '\n'))) goto bad_data_file;
354.  		*ep = 0;
355.  		/* if we match a key that begins with "~", skip this entry */
356.  		chk_skip = (*buf == '~') ? 1 : 0;
357.  		if (pmatch(&buf[chk_skip], dbase_str) ||
358.  			(alt && pmatch(&buf[chk_skip], alt))) {
359.  		    if (chk_skip) {
360.  			skipping_entry = TRUE;
361.  			continue;
362.  		    } else {
363.  			found_in_file = TRUE;
364.  			break;
365.  		    }
366.  		}
367.  	    }
368.  	}
369.      }
370.  
371.      if(found_in_file) {
372.  	long entry_offset;
373.  	int  entry_count;
374.  	int  i;
375.  
376.  	/* skip over other possible matches for the info */
377.  	do {
378.  	    if (!dlb_fgets(buf, BUFSZ, fp)) goto bad_data_file;
379.  	} while (!digit(*buf));
380.  	if (sscanf(buf, "%ld,%d\n", &entry_offset, &entry_count) < 2) {
381.  bad_data_file:	impossible("'data' file in wrong format");
382.  		(void) dlb_fclose(fp);
383.  		return;
384.  	}
385.  
386.  	if (user_typed_name || without_asking || yn("More info?") == 'y') {
387.  	    winid datawin;
388.  
389.  	    if (dlb_fseek(fp, txt_offset + entry_offset, SEEK_SET) < 0) {
390.  		pline("? Seek error on 'data' file!");
391.  		(void) dlb_fclose(fp);
392.  		return;
393.  	    }
394.  	    datawin = create_nhwindow(NHW_MENU);
395.  	    for (i = 0; i < entry_count; i++) {
396.  		if (!dlb_fgets(buf, BUFSZ, fp)) goto bad_data_file;
397.  		if ((ep = index(buf, '\n')) != 0) *ep = 0;
398.  		if (index(buf+1, '\t') != 0) (void) tabexpand(buf+1);
399.  		putstr(datawin, 0, buf+1);
400.  	    }
401.  	    display_nhwindow(datawin, FALSE);
402.  	    destroy_nhwindow(datawin);
403.  	}
404.      } else if (user_typed_name)
405.  	pline("I don't have any information on those things.");
406.  
407.      (void) dlb_fclose(fp);
408.  }
409.  
410.  /* getpos() return values */
411.  #define LOOK_TRADITIONAL	0	/* '.' -- ask about "more info?" */
412.  #define LOOK_QUICK		1	/* ',' -- skip "more info?" */
413.  #define LOOK_ONCE		2	/* ';' -- skip and stop looping */
414.  #define LOOK_VERBOSE		3	/* ':' -- show more info w/o asking */
415.  
416.  /* also used by getpos hack in do_name.c */
417.  const char what_is_an_unknown_object[] = "an unknown object";
418.  
419.  STATIC_OVL int
420.  do_look(quick)
421.      boolean quick;	/* use cursor && don't search for "more info" */
422.  {
423.      char    out_str[BUFSZ], look_buf[BUFSZ];
424.      const char *x_str, *firstmatch = 0;
425.      struct permonst *pm = 0;
426.      int     i, ans = 0;
427.      int     sym;		/* typed symbol or converted glyph */
428.      int	    found;		/* count of matching syms found */
429.      coord   cc;			/* screen pos of unknown glyph */
430.      boolean save_verbose;	/* saved value of flags.verbose */
431.      boolean from_screen;	/* question from the screen */
432.      boolean need_to_look;	/* need to get explan. from glyph */
433.      boolean hit_trap;		/* true if found trap explanation */
434.      int skipped_venom = 0;	/* non-zero if we ignored "splash of venom" */
435.      static const char *mon_interior = "the interior of a monster";
436.  
437.      if (quick) {
438.  	from_screen = TRUE;	/* yes, we want to use the cursor */
439.      } else {
440.  	i = ynq("Specify unknown object by cursor?");
441.  	if (i == 'q') return 0;
442.  	from_screen = (i == 'y');
443.      }
444.  
445.      if (from_screen) {
446.  	cc.x = u.ux;
447.  	cc.y = u.uy;
448.  	sym = 0;		/* gcc -Wall lint */
449.      } else {
450.  	getlin("Specify what? (type the word)", out_str);
451.  	if (out_str[0] == '\0' || out_str[0] == '\033')
452.  	    return 0;
453.  
454.  	if (out_str[1]) {	/* user typed in a complete string */
455.  	    checkfile(out_str, pm, TRUE, TRUE);
456.  	    return 0;
457.  	}
458.  	sym = out_str[0];
459.      }
460.  
461.      /* Save the verbose flag, we change it later. */
462.      save_verbose = flags.verbose;
463.      flags.verbose = flags.verbose && !quick;
464.      /*
465.       * The user typed one letter, or we're identifying from the screen.
466.       */
467.      do {
468.  	/* Reset some variables. */
469.  	need_to_look = FALSE;
470.  	pm = (struct permonst *)0;
471.  	found = 0;
472.  	out_str[0] = '\0';
473.  
474.  	if (from_screen) {
475.  	    int glyph;	/* glyph at selected position */
476.  
477.  	    if (flags.verbose)
478.  		pline("Please move the cursor to %s.",
479.  		       what_is_an_unknown_object);
480.  	    else
481.  		pline("Pick an object.");
482.  
483.  	    ans = getpos(&cc, quick, what_is_an_unknown_object);
484.  	    if (ans < 0 || cc.x < 0) {
485.  		flags.verbose = save_verbose;
486.  		return 0;	/* done */
487.  	    }
488.  	    flags.verbose = FALSE;	/* only print long question once */
489.  
490.  	    /* Convert the glyph at the selected position to a symbol. */
491.  	    glyph = glyph_at(cc.x,cc.y);
492.  	    if (glyph_is_cmap(glyph)) {
493.  		sym = showsyms[glyph_to_cmap(glyph)];
494.  	    } else if (glyph_is_trap(glyph)) {
495.  		sym = showsyms[trap_to_defsym(glyph_to_trap(glyph))];
496.  	    } else if (glyph_is_object(glyph)) {
497.  		sym = oc_syms[(int)objects[glyph_to_obj(glyph)].oc_class];
498.  		if (sym == '`' && iflags.bouldersym && (int)glyph_to_obj(glyph) == BOULDER)
499.  			sym = iflags.bouldersym;
500.  	    } else if (glyph_is_monster(glyph)) {
501.  		/* takes care of pets, detected, ridden, and regular mons */
502.  		sym = monsyms[(int)mons[glyph_to_mon(glyph)].mlet];
503.  	    } else if (glyph_is_swallow(glyph)) {
504.  		sym = showsyms[glyph_to_swallow(glyph)+S_sw_tl];
505.  	    } else if (glyph_is_invisible(glyph)) {
506.  		sym = DEF_INVISIBLE;
507.  	    } else if (glyph_is_warning(glyph)) {
508.  		sym = glyph_to_warning(glyph);
509.  	    	sym = warnsyms[sym];
510.  	    } else {
511.  		impossible("do_look:  bad glyph %d at (%d,%d)",
512.  						glyph, (int)cc.x, (int)cc.y);
513.  		sym = ' ';
514.  	    }
515.  	}
516.  
517.  	/*
518.  	 * Check all the possibilities, saving all explanations in a buffer.
519.  	 * When all have been checked then the string is printed.
520.  	 */
521.  
522.  	/* Check for monsters */
523.  	for (i = 0; i < MAXMCLASSES; i++) {
524.  	    if (sym == (from_screen ? monsyms[i] : def_monsyms[i])) {
525.  		need_to_look = TRUE;
526.  		if (!found) {
527.  		    Sprintf(out_str, "%c       %s", sym, an(monexplain[i]));
528.  		    firstmatch = monexplain[i];
529.  		    found++;
530.  		} else {
531.  		    found += append_str(out_str, an(monexplain[i]));
532.  		}
533.  	    }
534.  	}
535.  	/* handle '@' as a special case; firstmatch is guaranteed
536.  	   to already be set in that case */
537.  	if (!from_screen ? (sym == def_monsyms[S_HUMAN]) :
538.  		(cc.x == u.ux && cc.y == u.uy && sym == monsyms[S_HUMAN]))
539.  	     found += append_str(out_str, "you");	/* tack on "or you" */
540.  
541.  	/*
542.  	 * Special case: if identifying from the screen, and we're swallowed,
543.  	 * and looking at something other than our own symbol, then just say
544.  	 * "the interior of a monster".
545.  	 */
546.  	if (u.uswallow && from_screen && is_swallow_sym(sym)) {
547.  	    if (!found) {
548.  		Sprintf(out_str, "%c       %s", sym, mon_interior);
549.  		firstmatch = mon_interior;
550.  	    } else {
551.  		found += append_str(out_str, mon_interior);
552.  	    }
553.  	    need_to_look = TRUE;
554.  	}
555.  
556.  	/* Now check for objects */
557.  	for (i = 1; i < MAXOCLASSES; i++) {
558.  	    if (sym == (from_screen ? oc_syms[i] : def_oc_syms[i])) {
559.  		need_to_look = TRUE;
560.  		if (from_screen && i == VENOM_CLASS) {
561.  		    skipped_venom++;
562.  		    continue;
563.  		}
564.  		if (!found) {
565.  		    Sprintf(out_str, "%c       %s", sym, an(objexplain[i]));
566.  		    firstmatch = objexplain[i];
567.  		    found++;
568.  		} else {
569.  		    found += append_str(out_str, an(objexplain[i]));
570.  		}
571.  	    }
572.  	}
573.  
574.  	if (sym == DEF_INVISIBLE) {
575.  	    if (!found) {
576.  		Sprintf(out_str, "%c       %s", sym, an(invisexplain));
577.  		firstmatch = invisexplain;
578.  		found++;
579.  	    } else {
580.  		found += append_str(out_str, an(invisexplain));
581.  	    }
582.  	}
583.  
584.  #define is_cmap_trap(i) ((i) >= S_arrow_trap && (i) <= S_polymorph_trap)
585.  #define is_cmap_drawbridge(i) ((i) >= S_vodbridge && (i) <= S_hcdbridge)
586.  
587.  	/* Now check for graphics symbols */
588.  	for (hit_trap = FALSE, i = 0; i < MAXPCHARS; i++) {
589.  	    x_str = defsyms[i].explanation;
590.  	    if (sym == (from_screen ? showsyms[i] : defsyms[i].sym) && *x_str) {
591.  		/* avoid "an air", "a water", or "a floor of a room" */
592.  		int article = (i == S_room) ? 2 :		/* 2=>"the" */
593.  			      !(strcmp(x_str, "air") == 0 ||	/* 1=>"an"  */
594.  				strcmp(x_str, "water") == 0);	/* 0=>(none)*/
595.  
596.  		if (!found) {
597.  		    if (is_cmap_trap(i)) {
598.  			Sprintf(out_str, "%c       a trap", sym);
599.  			hit_trap = TRUE;
600.  		    } else {
601.  			Sprintf(out_str, "%c       %s", sym,
602.  				article == 2 ? the(x_str) :
603.  				article == 1 ? an(x_str) : x_str);
604.  		    }
605.  		    firstmatch = x_str;
606.  		    found++;
607.  		} else if (!u.uswallow && !(hit_trap && is_cmap_trap(i)) &&
608.  			   !(found >= 3 && is_cmap_drawbridge(i))) {
609.  		    found += append_str(out_str,
610.  					article == 2 ? the(x_str) :
611.  					article == 1 ? an(x_str) : x_str);
612.  		    if (is_cmap_trap(i)) hit_trap = TRUE;
613.  		}
614.  
615.  		if (i == S_altar || is_cmap_trap(i))
616.  		    need_to_look = TRUE;
617.  	    }
618.  	}
619.  
620.  	/* Now check for warning symbols */
621.  	for (i = 1; i < WARNCOUNT; i++) {
622.  	    x_str = def_warnsyms[i].explanation;
623.  	    if (sym == (from_screen ? warnsyms[i] : def_warnsyms[i].sym)) {
624.  		if (!found) {
625.  			Sprintf(out_str, "%c       %s",
626.  				sym, def_warnsyms[i].explanation);
627.  			firstmatch = def_warnsyms[i].explanation;
628.  			found++;
629.  		} else {
630.  			found += append_str(out_str, def_warnsyms[i].explanation);
631.  		}
632.  		break;	/* out of for loop*/
633.  	    }
634.  	}
635.      
636.  	/* if we ignored venom and list turned out to be short, put it back */
637.  	if (skipped_venom && found < 2) {
638.  	    x_str = objexplain[VENOM_CLASS];
639.  	    if (!found) {
640.  		Sprintf(out_str, "%c       %s", sym, an(x_str));
641.  		firstmatch = x_str;
642.  		found++;
643.  	    } else {
644.  		found += append_str(out_str, an(x_str));
645.  	    }
646.  	}
647.  
648.  	/* handle optional boulder symbol as a special case */ 
649.  	if (iflags.bouldersym && sym == iflags.bouldersym)
650.  		found += append_str(out_str, "boulder");
651.  	
652.  	/*
653.  	 * If we are looking at the screen, follow multiple possibilities or
654.  	 * an ambiguous explanation by something more detailed.
655.  	 */
656.  	if (from_screen) {
657.  	    if (found > 1 || need_to_look) {
658.  		char monbuf[BUFSZ];
659.  		char temp_buf[BUFSZ];
660.  
661.  		pm = lookat(cc.x, cc.y, look_buf, monbuf);
662.  		firstmatch = look_buf;
663.  		if (*firstmatch) {
664.  		    Sprintf(temp_buf, " (%s)", firstmatch);
665.  		    (void)strncat(out_str, temp_buf, BUFSZ-strlen(out_str)-1);
666.  		    found = 1;	/* we have something to look up */
667.  		}
668.  		if (monbuf[0]) {
669.  		    Sprintf(temp_buf, " [seen: %s]", monbuf);
670.  		    (void)strncat(out_str, temp_buf, BUFSZ-strlen(out_str)-1);
671.  		}
672.  	    }
673.  	}
674.  
675.  	/* Finally, print out our explanation. */
676.  	if (found) {
677.  	    pline("%s", out_str);
678.  	    /* check the data file for information about this thing */
679.  	    if (found == 1 && ans != LOOK_QUICK && ans != LOOK_ONCE &&
680.  			(ans == LOOK_VERBOSE || (flags.help && !quick))) {
681.  		char temp_buf[BUFSZ];
682.  		Strcpy(temp_buf, firstmatch);
683.  		checkfile(temp_buf, pm, FALSE, (boolean)(ans == LOOK_VERBOSE));
684.  	    }
685.  	} else {
686.  	    pline("I've never heard of such things.");
687.  	}
688.  
689.      } while (from_screen && !quick && ans != LOOK_ONCE);
690.  
691.      flags.verbose = save_verbose;
692.      return 0;
693.  }
694.  
695.  
696.  int
697.  dowhatis()
698.  {
699.  	return do_look(FALSE);
700.  }
701.  
702.  int
703.  doquickwhatis()
704.  {
705.  	return do_look(TRUE);
706.  }
707.  
708.  int
709.  doidtrap()
710.  {
711.  	register struct trap *trap;
712.  	int x, y, tt;
713.  
714.  	if (!getdir((char *)0)) return 0;
715.  	x = u.ux + u.dx;
716.  	y = u.uy + u.dy;
717.  	for (trap = ftrap; trap; trap = trap->ntrap)
718.  	    if (trap->tx == x && trap->ty == y) {
719.  		if (!trap->tseen) break;
720.  		tt = trap->ttyp;
721.  		if (u.dz) {
722.  		    if (u.dz < 0 ? (tt == TRAPDOOR || tt == HOLE) :
723.  			    tt == ROCKTRAP) break;
724.  		}
725.  		tt = what_trap(tt);
726.  		pline("That is %s%s%s.",
727.  		      an(defsyms[trap_to_defsym(tt)].explanation),
728.  		      !trap->madeby_u ? "" : (tt == WEB) ? " woven" :
729.  			  /* trap doors & spiked pits can't be made by
730.  			     player, and should be considered at least
731.  			     as much "set" as "dug" anyway */
732.  			  (tt == HOLE || tt == PIT) ? " dug" : " set",
733.  		      !trap->madeby_u ? "" : " by you");
734.  		return 0;
735.  	    }
736.  	pline("I can't see a trap there.");
737.  	return 0;
738.  }
739.  
740.  int
741.  dowhatdoes()
742.  {
743.  	dlb *fp;
744.  	char bufr[BUFSZ+6];
745.  	register char *buf = &bufr[6], *ep, q, ctrl, meta;
746.  
747.  	fp = dlb_fopen(CMDHELPFILE, "r");
748.  	if (!fp) {
749.  		pline("Cannot open data file!");
750.  		return 0;
751.  	}
752.  
753.  #if defined(UNIX) || defined(VMS)
754.  	introff();
755.  #endif
756.  	q = yn_function("What command?", (char *)0, '\0');
757.  #if defined(UNIX) || defined(VMS)
758.  	intron();
759.  #endif
760.  	ctrl = ((q <= '\033') ? (q - 1 + 'A') : 0);
761.  	meta = ((0x80 & q) ? (0x7f & q) : 0);
762.  	while(dlb_fgets(buf,BUFSZ,fp))
763.  	    if ((ctrl && *buf=='^' && *(buf+1)==ctrl) ||
764.  		(meta && *buf=='M' && *(buf+1)=='-' && *(buf+2)==meta) ||
765.  		*buf==q) {
766.  		ep = index(buf, '\n');
767.  		if(ep) *ep = 0;
768.  		if (ctrl && buf[2] == '\t'){
769.  			buf = bufr + 1;
770.  			(void) strncpy(buf, "^?      ", 8);
771.  			buf[1] = ctrl;
772.  		} else if (meta && buf[3] == '\t'){
773.  			buf = bufr + 2;
774.  			(void) strncpy(buf, "M-?     ", 8);
775.  			buf[2] = meta;
776.  		} else if(buf[1] == '\t'){
777.  			buf = bufr;
778.  			buf[0] = q;
779.  			(void) strncpy(buf+1, "       ", 7);
780.  		}
781.  		pline("%s", buf);
782.  		(void) dlb_fclose(fp);
783.  		return 0;
784.  	    }
785.  	pline("I've never heard of such commands.");
786.  	(void) dlb_fclose(fp);
787.  	return 0;
788.  }
789.  
790.  /* data for help_menu() */
791.  static const char *help_menu_items[] = {
792.  /* 0*/	"Long description of the game and commands.",
793.  /* 1*/	"List of game commands.",
794.  /* 2*/	"Concise history of NetHack.",
795.  /* 3*/	"Info on a character in the game display.",
796.  /* 4*/	"Info on what a given key does.",
797.  /* 5*/	"List of game options.",
798.  /* 6*/	"Longer explanation of game options.",
799.  /* 7*/	"List of extended commands.",
800.  /* 8*/	"The NetHack license.",
801.  #ifdef PORT_HELP
802.  	"%s-specific help and commands.",
803.  #define PORT_HELP_ID 100
804.  #define WIZHLP_SLOT 10
805.  #else
806.  #define WIZHLP_SLOT 9
807.  #endif
808.  #ifdef WIZARD
809.  	"List of wizard-mode commands.",
810.  #endif
811.  	"",
812.  	(char *)0
813.  };
814.  
815.  STATIC_OVL boolean
816.  help_menu(sel)
817.  	int *sel;
818.  {
819.  	winid tmpwin = create_nhwindow(NHW_MENU);
820.  #ifdef PORT_HELP
821.  	char helpbuf[QBUFSZ];
822.  #endif
823.  	int i, n;
824.  	menu_item *selected;
825.  	anything any;
826.  
827.  	any.a_void = 0;		/* zero all bits */
828.  	start_menu(tmpwin);
829.  #ifdef WIZARD
830.  	if (!wizard) help_menu_items[WIZHLP_SLOT] = "",
831.  		     help_menu_items[WIZHLP_SLOT+1] = (char *)0;
832.  #endif
833.  	for (i = 0; help_menu_items[i]; i++)
834.  #ifdef PORT_HELP
835.  	    /* port-specific line has a %s in it for the PORT_ID */
836.  	    if (help_menu_items[i][0] == '%') {
837.  		Sprintf(helpbuf, help_menu_items[i], PORT_ID);
838.  		any.a_int = PORT_HELP_ID + 1;
839.  		add_menu(tmpwin, NO_GLYPH, &any, 0, 0, ATR_NONE,
840.  			 helpbuf, MENU_UNSELECTED);
841.  	    } else
842.  #endif
843.  	    {
844.  		any.a_int = (*help_menu_items[i]) ? i+1 : 0;
845.  		add_menu(tmpwin, NO_GLYPH, &any, 0, 0,
846.  			ATR_NONE, help_menu_items[i], MENU_UNSELECTED);
847.  	    }
848.  	end_menu(tmpwin, "Select one item:");
849.  	n = select_menu(tmpwin, PICK_ONE, &selected);
850.  	destroy_nhwindow(tmpwin);
851.  	if (n > 0) {
852.  	    *sel = selected[0].item.a_int - 1;
853.  	    free((genericptr_t)selected);
854.  	    return TRUE;
855.  	}
856.  	return FALSE;
857.  }
858.  
859.  int
860.  dohelp()
861.  {
862.  	int sel = 0;
863.  
864.  	if (help_menu(&sel)) {
865.  		switch (sel) {
866.  			case  0:  display_file(HELP, TRUE);  break;
867.  			case  1:  display_file(SHELP, TRUE);  break;
868.  			case  2:  (void) dohistory();  break;
869.  			case  3:  (void) dowhatis();  break;
870.  			case  4:  (void) dowhatdoes();  break;
871.  			case  5:  option_help();  break;
872.  			case  6:  display_file(OPTIONFILE, TRUE);  break;
873.  			case  7:  (void) doextlist();  break;
874.  			case  8:  display_file(LICENSE, TRUE);  break;
875.  #ifdef WIZARD
876.  			/* handle slot 9 or 10 */
877.  			default: display_file(DEBUGHELP, TRUE);  break;
878.  #endif
879.  #ifdef PORT_HELP
880.  			case PORT_HELP_ID:  port_help();  break;
881.  #endif
882.  		}
883.  	}
884.  	return 0;
885.  }
886.  
887.  int
888.  dohistory()
889.  {
890.  	display_file(HISTORY, TRUE);
891.  	return 0;
892.  }
893.  
894.  /*pager.c*/

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