1/*
  2 * Copyright (C) 2002 Roman Zippel <zippel@linux-m68k.org>
  3 * Released under the terms of the GNU GPL v2.0.
  4 */
  5
  6#include <ctype.h>
  7#include <stdarg.h>
  8#include <stdlib.h>
  9#include <string.h>
 10
 11#include "lkc.h"
 12
 13static const char nohelp_text[] = "There is no help available for this option.";
 14
 15struct menu rootmenu;
 16static struct menu **last_entry_ptr;
 17
 18struct file *file_list;
 19struct file *current_file;
 20
 21void menu_warn(struct menu *menu, const char *fmt, ...)
 22{
 23	va_list ap;
 24	va_start(ap, fmt);
 25	fprintf(stderr, "%s:%d:warning: ", menu->file->name, menu->lineno);
 26	vfprintf(stderr, fmt, ap);
 27	fprintf(stderr, "\n");
 28	va_end(ap);
 29}
 30
 31static void prop_warn(struct property *prop, const char *fmt, ...)
 32{
 33	va_list ap;
 34	va_start(ap, fmt);
 35	fprintf(stderr, "%s:%d:warning: ", prop->file->name, prop->lineno);
 36	vfprintf(stderr, fmt, ap);
 37	fprintf(stderr, "\n");
 38	va_end(ap);
 39}
 40
 41void _menu_init(void)
 42{
 43	current_entry = current_menu = &rootmenu;
 44	last_entry_ptr = &rootmenu.list;
 45}
 46
 47void menu_add_entry(struct symbol *sym)
 48{
 49	struct menu *menu;
 50
 51	menu = xmalloc(sizeof(*menu));
 52	memset(menu, 0, sizeof(*menu));
 53	menu->sym = sym;
 54	menu->parent = current_menu;
 55	menu->file = current_file;
 56	menu->lineno = zconf_lineno();
 57
 58	*last_entry_ptr = menu;
 59	last_entry_ptr = &menu->next;
 60	current_entry = menu;
 61	if (sym)
 62		menu_add_symbol(P_SYMBOL, sym, NULL);
 63}
 64
 
 
 
 
 65struct menu *menu_add_menu(void)
 66{
 
 67	last_entry_ptr = &current_entry->list;
 68	return current_menu = current_entry;
 69}
 70
 71void menu_end_menu(void)
 72{
 73	last_entry_ptr = &current_menu->next;
 74	current_menu = current_menu->parent;
 75}
 76
 77/*
 78 * Rewrites 'm' to 'm' && MODULES, so that it evaluates to 'n' when running
 79 * without modules
 80 */
 81static struct expr *rewrite_m(struct expr *e)
 82{
 83	if (!e)
 84		return e;
 85
 86	switch (e->type) {
 87	case E_NOT:
 88		e->left.expr = rewrite_m(e->left.expr);
 89		break;
 90	case E_OR:
 91	case E_AND:
 92		e->left.expr = rewrite_m(e->left.expr);
 93		e->right.expr = rewrite_m(e->right.expr);
 94		break;
 95	case E_SYMBOL:
 96		/* change 'm' into 'm' && MODULES */
 97		if (e->left.sym == &symbol_mod)
 98			return expr_alloc_and(e, expr_alloc_symbol(modules_sym));
 99		break;
100	default:
101		break;
102	}
103	return e;
104}
105
106void menu_add_dep(struct expr *dep)
107{
108	current_entry->dep = expr_alloc_and(current_entry->dep, dep);
109}
110
111void menu_set_type(int type)
112{
113	struct symbol *sym = current_entry->sym;
114
115	if (sym->type == type)
116		return;
117	if (sym->type == S_UNKNOWN) {
118		sym->type = type;
119		return;
120	}
121	menu_warn(current_entry,
122		"ignoring type redefinition of '%s' from '%s' to '%s'",
123		sym->name ? sym->name : "<choice>",
124		sym_type_name(sym->type), sym_type_name(type));
125}
126
127static struct property *menu_add_prop(enum prop_type type, char *prompt, struct expr *expr, struct expr *dep)
128{
129	struct property *prop = prop_alloc(type, current_entry->sym);
130
131	prop->menu = current_entry;
132	prop->expr = expr;
133	prop->visible.expr = dep;
134
135	if (prompt) {
136		if (isspace(*prompt)) {
137			prop_warn(prop, "leading whitespace ignored");
138			while (isspace(*prompt))
139				prompt++;
140		}
141		if (current_entry->prompt && current_entry != &rootmenu)
142			prop_warn(prop, "prompt redefined");
143
144		/* Apply all upper menus' visibilities to actual prompts. */
145		if(type == P_PROMPT) {
146			struct menu *menu = current_entry;
147
148			while ((menu = menu->parent) != NULL) {
149				struct expr *dup_expr;
150
151				if (!menu->visibility)
152					continue;
153				/*
154				 * Do not add a reference to the
155				 * menu's visibility expression but
156				 * use a copy of it.  Otherwise the
157				 * expression reduction functions
158				 * will modify expressions that have
159				 * multiple references which can
160				 * cause unwanted side effects.
161				 */
162				dup_expr = expr_copy(menu->visibility);
163
164				prop->visible.expr
165					= expr_alloc_and(prop->visible.expr,
166							 dup_expr);
167			}
168		}
169
170		current_entry->prompt = prop;
171	}
172	prop->text = prompt;
173
174	return prop;
175}
176
177struct property *menu_add_prompt(enum prop_type type, char *prompt, struct expr *dep)
178{
179	return menu_add_prop(type, prompt, NULL, dep);
180}
181
182void menu_add_visibility(struct expr *expr)
183{
184	current_entry->visibility = expr_alloc_and(current_entry->visibility,
185	    expr);
186}
187
188void menu_add_expr(enum prop_type type, struct expr *expr, struct expr *dep)
189{
190	menu_add_prop(type, NULL, expr, dep);
191}
192
193void menu_add_symbol(enum prop_type type, struct symbol *sym, struct expr *dep)
194{
195	menu_add_prop(type, NULL, expr_alloc_symbol(sym), dep);
196}
197
198void menu_add_option(int token, char *arg)
199{
 
 
200	switch (token) {
201	case T_OPT_MODULES:
202		if (modules_sym)
203			zconf_error("symbol '%s' redefines option 'modules'"
204				    " already defined by symbol '%s'",
205				    current_entry->sym->name,
206				    modules_sym->name
207				    );
208		modules_sym = current_entry->sym;
209		break;
210	case T_OPT_DEFCONFIG_LIST:
211		if (!sym_defconfig_list)
212			sym_defconfig_list = current_entry->sym;
213		else if (sym_defconfig_list != current_entry->sym)
214			zconf_error("trying to redefine defconfig symbol");
215		sym_defconfig_list->flags |= SYMBOL_AUTO;
216		break;
217	case T_OPT_ENV:
218		prop_add_env(arg);
219		break;
220	case T_OPT_ALLNOCONFIG_Y:
221		current_entry->sym->flags |= SYMBOL_ALLNOCONFIG_Y;
222		break;
223	}
224}
225
226static int menu_validate_number(struct symbol *sym, struct symbol *sym2)
227{
228	return sym2->type == S_INT || sym2->type == S_HEX ||
229	       (sym2->type == S_UNKNOWN && sym_string_valid(sym, sym2->name));
230}
231
232static void sym_check_prop(struct symbol *sym)
233{
234	struct property *prop;
235	struct symbol *sym2;
236	char *use;
237
238	for (prop = sym->prop; prop; prop = prop->next) {
239		switch (prop->type) {
240		case P_DEFAULT:
241			if ((sym->type == S_STRING || sym->type == S_INT || sym->type == S_HEX) &&
242			    prop->expr->type != E_SYMBOL)
243				prop_warn(prop,
244				    "default for config symbol '%s'"
245				    " must be a single symbol", sym->name);
246			if (prop->expr->type != E_SYMBOL)
247				break;
248			sym2 = prop_get_symbol(prop);
249			if (sym->type == S_HEX || sym->type == S_INT) {
250				if (!menu_validate_number(sym, sym2))
251					prop_warn(prop,
252					    "'%s': number is invalid",
253					    sym->name);
254			}
255			if (sym_is_choice(sym)) {
256				struct property *choice_prop =
257					sym_get_choice_prop(sym2);
258
259				if (!choice_prop ||
260				    prop_get_symbol(choice_prop) != sym)
261					prop_warn(prop,
262						  "choice default symbol '%s' is not contained in the choice",
263						  sym2->name);
264			}
265			break;
266		case P_SELECT:
267		case P_IMPLY:
268			use = prop->type == P_SELECT ? "select" : "imply";
269			sym2 = prop_get_symbol(prop);
270			if (sym->type != S_BOOLEAN && sym->type != S_TRISTATE)
271				prop_warn(prop,
272				    "config symbol '%s' uses %s, but is "
273				    "not bool or tristate", sym->name, use);
274			else if (sym2->type != S_UNKNOWN &&
275				 sym2->type != S_BOOLEAN &&
276				 sym2->type != S_TRISTATE)
277				prop_warn(prop,
278				    "'%s' has wrong type. '%s' only "
279				    "accept arguments of bool and "
280				    "tristate type", sym2->name, use);
281			break;
282		case P_RANGE:
283			if (sym->type != S_INT && sym->type != S_HEX)
284				prop_warn(prop, "range is only allowed "
285						"for int or hex symbols");
286			if (!menu_validate_number(sym, prop->expr->left.sym) ||
287			    !menu_validate_number(sym, prop->expr->right.sym))
288				prop_warn(prop, "range is invalid");
289			break;
290		default:
291			;
292		}
293	}
294}
295
296void menu_finalize(struct menu *parent)
297{
298	struct menu *menu, *last_menu;
299	struct symbol *sym;
300	struct property *prop;
301	struct expr *parentdep, *basedep, *dep, *dep2, **ep;
302
303	sym = parent->sym;
304	if (parent->list) {
305		/*
306		 * This menu node has children. We (recursively) process them
307		 * and propagate parent dependencies before moving on.
308		 */
309
310		if (sym && sym_is_choice(sym)) {
311			if (sym->type == S_UNKNOWN) {
312				/* find the first choice value to find out choice type */
313				current_entry = parent;
314				for (menu = parent->list; menu; menu = menu->next) {
315					if (menu->sym && menu->sym->type != S_UNKNOWN) {
316						menu_set_type(menu->sym->type);
317						break;
318					}
319				}
320			}
321			/* set the type of the remaining choice values */
322			for (menu = parent->list; menu; menu = menu->next) {
323				current_entry = menu;
324				if (menu->sym && menu->sym->type == S_UNKNOWN)
325					menu_set_type(sym->type);
326			}
327
328			/*
329			 * Use the choice itself as the parent dependency of
330			 * the contained items. This turns the mode of the
331			 * choice into an upper bound on the visibility of the
332			 * choice value symbols.
333			 */
334			parentdep = expr_alloc_symbol(sym);
335		} else if (parent->prompt)
336			/* Menu node for 'menu' */
337			parentdep = parent->prompt->visible.expr;
338		else
339			/* Menu node for 'if' */
340			parentdep = parent->dep;
341
342		/* For each child menu node... */
343		for (menu = parent->list; menu; menu = menu->next) {
344			/*
345			 * Propagate parent dependencies to the child menu
346			 * node, also rewriting and simplifying expressions
347			 */
348			basedep = rewrite_m(menu->dep);
349			basedep = expr_transform(basedep);
350			basedep = expr_alloc_and(expr_copy(parentdep), basedep);
351			basedep = expr_eliminate_dups(basedep);
352			menu->dep = basedep;
353
354			if (menu->sym)
355				/*
356				 * Note: For symbols, all prompts are included
357				 * too in the symbol's own property list
358				 */
359				prop = menu->sym->prop;
360			else
361				/*
362				 * For non-symbol menu nodes, we just need to
363				 * handle the prompt
364				 */
365				prop = menu->prompt;
366
367			/* For each property... */
368			for (; prop; prop = prop->next) {
369				if (prop->menu != menu)
370					/*
371					 * Two possibilities:
372					 *
373					 * 1. The property lacks dependencies
374					 *    and so isn't location-specific,
375					 *    e.g. an 'option'
376					 *
377					 * 2. The property belongs to a symbol
378					 *    defined in multiple locations and
379					 *    is from some other location. It
380					 *    will be handled there in that
381					 *    case.
382					 *
383					 * Skip the property.
384					 */
385					continue;
386
387				/*
388				 * Propagate parent dependencies to the
389				 * property's condition, rewriting and
390				 * simplifying expressions at the same time
391				 */
392				dep = rewrite_m(prop->visible.expr);
393				dep = expr_transform(dep);
394				dep = expr_alloc_and(expr_copy(basedep), dep);
395				dep = expr_eliminate_dups(dep);
396				if (menu->sym && menu->sym->type != S_TRISTATE)
397					dep = expr_trans_bool(dep);
398				prop->visible.expr = dep;
399
400				/*
401				 * Handle selects and implies, which modify the
402				 * dependencies of the selected/implied symbol
403				 */
404				if (prop->type == P_SELECT) {
405					struct symbol *es = prop_get_symbol(prop);
406					es->rev_dep.expr = expr_alloc_or(es->rev_dep.expr,
407							expr_alloc_and(expr_alloc_symbol(menu->sym), expr_copy(dep)));
408				} else if (prop->type == P_IMPLY) {
409					struct symbol *es = prop_get_symbol(prop);
410					es->implied.expr = expr_alloc_or(es->implied.expr,
411							expr_alloc_and(expr_alloc_symbol(menu->sym), expr_copy(dep)));
412				}
413			}
414		}
415
416		if (sym && sym_is_choice(sym))
417			expr_free(parentdep);
418
419		/*
420		 * Recursively process children in the same fashion before
421		 * moving on
422		 */
423		for (menu = parent->list; menu; menu = menu->next)
424			menu_finalize(menu);
425	} else if (sym) {
426		/*
427		 * Automatic submenu creation. If sym is a symbol and A, B, C,
428		 * ... are consecutive items (symbols, menus, ifs, etc.) that
429		 * all depend on sym, then the following menu structure is
430		 * created:
431		 *
432		 *	sym
433		 *	 +-A
434		 *	 +-B
435		 *	 +-C
436		 *	 ...
437		 *
438		 * This also works recursively, giving the following structure
439		 * if A is a symbol and B depends on A:
440		 *
441		 *	sym
442		 *	 +-A
443		 *	 | +-B
444		 *	 +-C
445		 *	 ...
446		 */
447
448		basedep = parent->prompt ? parent->prompt->visible.expr : NULL;
449		basedep = expr_trans_compare(basedep, E_UNEQUAL, &symbol_no);
450		basedep = expr_eliminate_dups(expr_transform(basedep));
451
452		/* Examine consecutive elements after sym */
453		last_menu = NULL;
454		for (menu = parent->next; menu; menu = menu->next) {
455			dep = menu->prompt ? menu->prompt->visible.expr : menu->dep;
456			if (!expr_contains_symbol(dep, sym))
457				/* No dependency, quit */
458				break;
459			if (expr_depends_symbol(dep, sym))
460				/* Absolute dependency, put in submenu */
461				goto next;
462
463			/*
464			 * Also consider it a dependency on sym if our
465			 * dependencies contain sym and are a "superset" of
466			 * sym's dependencies, e.g. '(sym || Q) && R' when sym
467			 * depends on R.
468			 *
469			 * Note that 'R' might be from an enclosing menu or if,
470			 * making this a more common case than it might seem.
471			 */
472			dep = expr_trans_compare(dep, E_UNEQUAL, &symbol_no);
473			dep = expr_eliminate_dups(expr_transform(dep));
474			dep2 = expr_copy(basedep);
475			expr_eliminate_eq(&dep, &dep2);
476			expr_free(dep);
477			if (!expr_is_yes(dep2)) {
478				/* Not superset, quit */
479				expr_free(dep2);
480				break;
481			}
482			/* Superset, put in submenu */
483			expr_free(dep2);
484		next:
485			menu_finalize(menu);
486			menu->parent = parent;
487			last_menu = menu;
488		}
489		expr_free(basedep);
490		if (last_menu) {
491			parent->list = parent->next;
492			parent->next = last_menu->next;
493			last_menu->next = NULL;
494		}
495
496		sym->dir_dep.expr = expr_alloc_or(sym->dir_dep.expr, parent->dep);
497	}
498	for (menu = parent->list; menu; menu = menu->next) {
499		if (sym && sym_is_choice(sym) &&
500		    menu->sym && !sym_is_choice_value(menu->sym)) {
501			current_entry = menu;
502			menu->sym->flags |= SYMBOL_CHOICEVAL;
503			if (!menu->prompt)
504				menu_warn(menu, "choice value must have a prompt");
505			for (prop = menu->sym->prop; prop; prop = prop->next) {
506				if (prop->type == P_DEFAULT)
507					prop_warn(prop, "defaults for choice "
508						  "values not supported");
509				if (prop->menu == menu)
510					continue;
511				if (prop->type == P_PROMPT &&
512				    prop->menu->parent->sym != sym)
513					prop_warn(prop, "choice value used outside its choice group");
514			}
515			/* Non-tristate choice values of tristate choices must
516			 * depend on the choice being set to Y. The choice
517			 * values' dependencies were propagated to their
518			 * properties above, so the change here must be re-
519			 * propagated.
520			 */
521			if (sym->type == S_TRISTATE && menu->sym->type != S_TRISTATE) {
522				basedep = expr_alloc_comp(E_EQUAL, sym, &symbol_yes);
523				menu->dep = expr_alloc_and(basedep, menu->dep);
524				for (prop = menu->sym->prop; prop; prop = prop->next) {
525					if (prop->menu != menu)
526						continue;
527					prop->visible.expr = expr_alloc_and(expr_copy(basedep),
528									    prop->visible.expr);
529				}
530			}
531			menu_add_symbol(P_CHOICE, sym, NULL);
532			prop = sym_get_choice_prop(sym);
533			for (ep = &prop->expr; *ep; ep = &(*ep)->left.expr)
534				;
535			*ep = expr_alloc_one(E_LIST, NULL);
536			(*ep)->right.sym = menu->sym;
537		}
538
539		/*
540		 * This code serves two purposes:
541		 *
542		 * (1) Flattening 'if' blocks, which do not specify a submenu
543		 *     and only add dependencies.
544		 *
545		 *     (Automatic submenu creation might still create a submenu
546		 *     from an 'if' before this code runs.)
547		 *
548		 * (2) "Undoing" any automatic submenus created earlier below
549		 *     promptless symbols.
550		 *
551		 * Before:
552		 *
553		 *	A
554		 *	if ... (or promptless symbol)
555		 *	 +-B
556		 *	 +-C
557		 *	D
558		 *
559		 * After:
560		 *
561		 *	A
562		 *	if ... (or promptless symbol)
563		 *	B
564		 *	C
565		 *	D
566		 */
567		if (menu->list && (!menu->prompt || !menu->prompt->text)) {
568			for (last_menu = menu->list; ; last_menu = last_menu->next) {
569				last_menu->parent = parent;
570				if (!last_menu->next)
571					break;
572			}
573			last_menu->next = menu->next;
574			menu->next = menu->list;
575			menu->list = NULL;
576		}
577	}
578
579	if (sym && !(sym->flags & SYMBOL_WARNED)) {
580		if (sym->type == S_UNKNOWN)
581			menu_warn(parent, "config symbol defined without type");
582
583		if (sym_is_choice(sym) && !parent->prompt)
584			menu_warn(parent, "choice must have a prompt");
585
586		/* Check properties connected to this symbol */
587		sym_check_prop(sym);
588		sym->flags |= SYMBOL_WARNED;
589	}
590
591	/*
592	 * For non-optional choices, add a reverse dependency (corresponding to
593	 * a select) of '<visibility> && m'. This prevents the user from
594	 * setting the choice mode to 'n' when the choice is visible.
595	 *
596	 * This would also work for non-choice symbols, but only non-optional
597	 * choices clear SYMBOL_OPTIONAL as of writing. Choices are implemented
598	 * as a type of symbol.
599	 */
600	if (sym && !sym_is_optional(sym) && parent->prompt) {
601		sym->rev_dep.expr = expr_alloc_or(sym->rev_dep.expr,
602				expr_alloc_and(parent->prompt->visible.expr,
603					expr_alloc_symbol(&symbol_mod)));
604	}
605}
606
607bool menu_has_prompt(struct menu *menu)
608{
609	if (!menu->prompt)
610		return false;
611	return true;
612}
613
614/*
615 * Determine if a menu is empty.
616 * A menu is considered empty if it contains no or only
617 * invisible entries.
618 */
619bool menu_is_empty(struct menu *menu)
620{
621	struct menu *child;
622
623	for (child = menu->list; child; child = child->next) {
624		if (menu_is_visible(child))
625			return(false);
626	}
627	return(true);
628}
629
630bool menu_is_visible(struct menu *menu)
631{
632	struct menu *child;
633	struct symbol *sym;
634	tristate visible;
635
636	if (!menu->prompt)
637		return false;
638
639	if (menu->visibility) {
640		if (expr_calc_value(menu->visibility) == no)
641			return false;
642	}
643
644	sym = menu->sym;
645	if (sym) {
646		sym_calc_value(sym);
647		visible = menu->prompt->visible.tri;
648	} else
649		visible = menu->prompt->visible.tri = expr_calc_value(menu->prompt->visible.expr);
650
651	if (visible != no)
652		return true;
653
654	if (!sym || sym_get_tristate_value(menu->sym) == no)
655		return false;
656
657	for (child = menu->list; child; child = child->next) {
658		if (menu_is_visible(child)) {
659			if (sym)
660				sym->flags |= SYMBOL_DEF_USER;
661			return true;
662		}
663	}
664
665	return false;
666}
667
668const char *menu_get_prompt(struct menu *menu)
669{
670	if (menu->prompt)
671		return menu->prompt->text;
672	else if (menu->sym)
673		return menu->sym->name;
674	return NULL;
675}
676
677struct menu *menu_get_root_menu(struct menu *menu)
678{
679	return &rootmenu;
680}
681
682struct menu *menu_get_parent_menu(struct menu *menu)
683{
684	enum prop_type type;
685
686	for (; menu != &rootmenu; menu = menu->parent) {
687		type = menu->prompt ? menu->prompt->type : 0;
688		if (type == P_MENU)
689			break;
690	}
691	return menu;
692}
693
694bool menu_has_help(struct menu *menu)
695{
696	return menu->help != NULL;
697}
698
699const char *menu_get_help(struct menu *menu)
700{
701	if (menu->help)
702		return menu->help;
703	else
704		return "";
705}
706
707static void get_prompt_str(struct gstr *r, struct property *prop,
708			   struct list_head *head)
709{
710	int i, j;
711	struct menu *submenu[8], *menu, *location = NULL;
712	struct jump_key *jump = NULL;
713
714	str_printf(r, _("Prompt: %s\n"), _(prop->text));
 
 
 
 
 
 
 
715	menu = prop->menu->parent;
716	for (i = 0; menu != &rootmenu && i < 8; menu = menu->parent) {
717		bool accessible = menu_is_visible(menu);
718
719		submenu[i++] = menu;
720		if (location == NULL && accessible)
721			location = menu;
722	}
723	if (head && location) {
724		jump = xmalloc(sizeof(struct jump_key));
725
726		if (menu_is_visible(prop->menu)) {
727			/*
728			 * There is not enough room to put the hint at the
729			 * beginning of the "Prompt" line. Put the hint on the
730			 * last "Location" line even when it would belong on
731			 * the former.
732			 */
733			jump->target = prop->menu;
734		} else
735			jump->target = location;
736
737		if (list_empty(head))
738			jump->index = 0;
739		else
740			jump->index = list_entry(head->prev, struct jump_key,
741						 entries)->index + 1;
742
743		list_add_tail(&jump->entries, head);
744	}
745
746	if (i > 0) {
747		str_printf(r, _("  Location:\n"));
748		for (j = 4; --i >= 0; j += 2) {
749			menu = submenu[i];
750			if (jump && menu == location)
751				jump->offset = strlen(r->s);
752			str_printf(r, "%*c-> %s", j, ' ',
753				   _(menu_get_prompt(menu)));
754			if (menu->sym) {
755				str_printf(r, " (%s [=%s])", menu->sym->name ?
756					menu->sym->name : _("<choice>"),
757					sym_get_string_value(menu->sym));
758			}
759			str_append(r, "\n");
760		}
761	}
762}
763
764/*
765 * get property of type P_SYMBOL
766 */
767static struct property *get_symbol_prop(struct symbol *sym)
768{
769	struct property *prop = NULL;
770
771	for_all_properties(sym, prop, P_SYMBOL)
772		break;
773	return prop;
774}
775
776static void get_symbol_props_str(struct gstr *r, struct symbol *sym,
777				 enum prop_type tok, const char *prefix)
778{
779	bool hit = false;
780	struct property *prop;
781
782	for_all_properties(sym, prop, tok) {
783		if (!hit) {
784			str_append(r, prefix);
785			hit = true;
786		} else
787			str_printf(r, " && ");
788		expr_gstr_print(prop->expr, r);
789	}
790	if (hit)
791		str_append(r, "\n");
792}
793
794/*
795 * head is optional and may be NULL
796 */
797static void get_symbol_str(struct gstr *r, struct symbol *sym,
798		    struct list_head *head)
799{
 
800	struct property *prop;
801
802	if (sym && sym->name) {
803		str_printf(r, "Symbol: %s [=%s]\n", sym->name,
804			   sym_get_string_value(sym));
805		str_printf(r, "Type  : %s\n", sym_type_name(sym->type));
806		if (sym->type == S_INT || sym->type == S_HEX) {
807			prop = sym_get_range_prop(sym);
808			if (prop) {
809				str_printf(r, "Range : ");
810				expr_gstr_print(prop->expr, r);
811				str_append(r, "\n");
812			}
813		}
814	}
815	for_all_prompts(sym, prop)
816		get_prompt_str(r, prop, head);
817
818	prop = get_symbol_prop(sym);
819	if (prop) {
820		str_printf(r, _("  Defined at %s:%d\n"), prop->menu->file->name,
821			prop->menu->lineno);
822		if (!expr_is_yes(prop->visible.expr)) {
823			str_append(r, _("  Depends on: "));
824			expr_gstr_print(prop->visible.expr, r);
825			str_append(r, "\n");
826		}
827	}
828
829	get_symbol_props_str(r, sym, P_SELECT, _("  Selects: "));
830	if (sym->rev_dep.expr) {
831		expr_gstr_print_revdep(sym->rev_dep.expr, r, yes, "  Selected by [y]:\n");
832		expr_gstr_print_revdep(sym->rev_dep.expr, r, mod, "  Selected by [m]:\n");
833		expr_gstr_print_revdep(sym->rev_dep.expr, r, no, "  Selected by [n]:\n");
834	}
835
836	get_symbol_props_str(r, sym, P_IMPLY, _("  Implies: "));
837	if (sym->implied.expr) {
838		expr_gstr_print_revdep(sym->implied.expr, r, yes, "  Implied by [y]:\n");
839		expr_gstr_print_revdep(sym->implied.expr, r, mod, "  Implied by [m]:\n");
840		expr_gstr_print_revdep(sym->implied.expr, r, no, "  Implied by [n]:\n");
841	}
842
843	str_append(r, "\n\n");
844}
845
846struct gstr get_relations_str(struct symbol **sym_arr, struct list_head *head)
847{
848	struct symbol *sym;
849	struct gstr res = str_new();
850	int i;
851
852	for (i = 0; sym_arr && (sym = sym_arr[i]); i++)
853		get_symbol_str(&res, sym, head);
854	if (!i)
855		str_append(&res, _("No matches found.\n"));
856	return res;
857}
858
859
860void menu_get_ext_help(struct menu *menu, struct gstr *help)
861{
862	struct symbol *sym = menu->sym;
863	const char *help_text = nohelp_text;
864
865	if (menu_has_help(menu)) {
866		if (sym->name)
867			str_printf(help, "%s%s:\n\n", CONFIG_, sym->name);
868		help_text = menu_get_help(menu);
869	}
870	str_printf(help, "%s\n", _(help_text));
871	if (sym)
872		get_symbol_str(help, sym, NULL);
873}