1// SPDX-License-Identifier: GPL-2.0
  2/*
  3 * Copyright (C) 2002 Roman Zippel <zippel@linux-m68k.org>
  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_modules(void)
199{
200	if (modules_sym)
201		zconf_error("symbol '%s' redefines option 'modules' already defined by symbol '%s'",
202			    current_entry->sym->name, modules_sym->name);
203	modules_sym = current_entry->sym;
204}
205
206void menu_add_option_defconfig_list(void)
207{
208	if (!sym_defconfig_list)
209		sym_defconfig_list = current_entry->sym;
210	else if (sym_defconfig_list != current_entry->sym)
211		zconf_error("trying to redefine defconfig symbol");
212	sym_defconfig_list->flags |= SYMBOL_NO_WRITE;
213}
214
215void menu_add_option_allnoconfig_y(void)
216{
217	current_entry->sym->flags |= SYMBOL_ALLNOCONFIG_Y;
218}
219
220static int menu_validate_number(struct symbol *sym, struct symbol *sym2)
221{
222	return sym2->type == S_INT || sym2->type == S_HEX ||
223	       (sym2->type == S_UNKNOWN && sym_string_valid(sym, sym2->name));
224}
225
226static void sym_check_prop(struct symbol *sym)
227{
228	struct property *prop;
229	struct symbol *sym2;
230	char *use;
231
232	for (prop = sym->prop; prop; prop = prop->next) {
233		switch (prop->type) {
234		case P_DEFAULT:
235			if ((sym->type == S_STRING || sym->type == S_INT || sym->type == S_HEX) &&
236			    prop->expr->type != E_SYMBOL)
237				prop_warn(prop,
238				    "default for config symbol '%s'"
239				    " must be a single symbol", sym->name);
240			if (prop->expr->type != E_SYMBOL)
241				break;
242			sym2 = prop_get_symbol(prop);
243			if (sym->type == S_HEX || sym->type == S_INT) {
244				if (!menu_validate_number(sym, sym2))
245					prop_warn(prop,
246					    "'%s': number is invalid",
247					    sym->name);
248			}
249			if (sym_is_choice(sym)) {
250				struct property *choice_prop =
251					sym_get_choice_prop(sym2);
252
253				if (!choice_prop ||
254				    prop_get_symbol(choice_prop) != sym)
255					prop_warn(prop,
256						  "choice default symbol '%s' is not contained in the choice",
257						  sym2->name);
258			}
259			break;
260		case P_SELECT:
261		case P_IMPLY:
262			use = prop->type == P_SELECT ? "select" : "imply";
263			sym2 = prop_get_symbol(prop);
264			if (sym->type != S_BOOLEAN && sym->type != S_TRISTATE)
265				prop_warn(prop,
266				    "config symbol '%s' uses %s, but is "
267				    "not bool or tristate", sym->name, use);
268			else if (sym2->type != S_UNKNOWN &&
269				 sym2->type != S_BOOLEAN &&
270				 sym2->type != S_TRISTATE)
271				prop_warn(prop,
272				    "'%s' has wrong type. '%s' only "
273				    "accept arguments of bool and "
274				    "tristate type", sym2->name, use);
275			break;
276		case P_RANGE:
277			if (sym->type != S_INT && sym->type != S_HEX)
278				prop_warn(prop, "range is only allowed "
279						"for int or hex symbols");
280			if (!menu_validate_number(sym, prop->expr->left.sym) ||
281			    !menu_validate_number(sym, prop->expr->right.sym))
282				prop_warn(prop, "range is invalid");
283			break;
284		default:
285			;
286		}
287	}
288}
289
290void menu_finalize(struct menu *parent)
291{
292	struct menu *menu, *last_menu;
293	struct symbol *sym;
294	struct property *prop;
295	struct expr *parentdep, *basedep, *dep, *dep2, **ep;
296
297	sym = parent->sym;
298	if (parent->list) {
299		/*
300		 * This menu node has children. We (recursively) process them
301		 * and propagate parent dependencies before moving on.
302		 */
303
304		if (sym && sym_is_choice(sym)) {
305			if (sym->type == S_UNKNOWN) {
306				/* find the first choice value to find out choice type */
307				current_entry = parent;
308				for (menu = parent->list; menu; menu = menu->next) {
309					if (menu->sym && menu->sym->type != S_UNKNOWN) {
310						menu_set_type(menu->sym->type);
311						break;
312					}
313				}
314			}
315			/* set the type of the remaining choice values */
316			for (menu = parent->list; menu; menu = menu->next) {
317				current_entry = menu;
318				if (menu->sym && menu->sym->type == S_UNKNOWN)
319					menu_set_type(sym->type);
320			}
321
322			/*
323			 * Use the choice itself as the parent dependency of
324			 * the contained items. This turns the mode of the
325			 * choice into an upper bound on the visibility of the
326			 * choice value symbols.
327			 */
328			parentdep = expr_alloc_symbol(sym);
329		} else if (parent->prompt)
330			/* Menu node for 'menu' */
331			parentdep = parent->prompt->visible.expr;
332		else
333			/* Menu node for 'if' */
334			parentdep = parent->dep;
335
336		/* For each child menu node... */
337		for (menu = parent->list; menu; menu = menu->next) {
338			/*
339			 * Propagate parent dependencies to the child menu
340			 * node, also rewriting and simplifying expressions
341			 */
342			basedep = rewrite_m(menu->dep);
343			basedep = expr_transform(basedep);
344			basedep = expr_alloc_and(expr_copy(parentdep), basedep);
345			basedep = expr_eliminate_dups(basedep);
346			menu->dep = basedep;
347
348			if (menu->sym)
349				/*
350				 * Note: For symbols, all prompts are included
351				 * too in the symbol's own property list
352				 */
353				prop = menu->sym->prop;
354			else
355				/*
356				 * For non-symbol menu nodes, we just need to
357				 * handle the prompt
358				 */
359				prop = menu->prompt;
360
361			/* For each property... */
362			for (; prop; prop = prop->next) {
363				if (prop->menu != menu)
364					/*
365					 * Two possibilities:
366					 *
367					 * 1. The property lacks dependencies
368					 *    and so isn't location-specific,
369					 *    e.g. an 'option'
370					 *
371					 * 2. The property belongs to a symbol
372					 *    defined in multiple locations and
373					 *    is from some other location. It
374					 *    will be handled there in that
375					 *    case.
376					 *
377					 * Skip the property.
378					 */
379					continue;
380
381				/*
382				 * Propagate parent dependencies to the
383				 * property's condition, rewriting and
384				 * simplifying expressions at the same time
385				 */
386				dep = rewrite_m(prop->visible.expr);
387				dep = expr_transform(dep);
388				dep = expr_alloc_and(expr_copy(basedep), dep);
389				dep = expr_eliminate_dups(dep);
390				if (menu->sym && menu->sym->type != S_TRISTATE)
391					dep = expr_trans_bool(dep);
392				prop->visible.expr = dep;
393
394				/*
395				 * Handle selects and implies, which modify the
396				 * dependencies of the selected/implied symbol
397				 */
398				if (prop->type == P_SELECT) {
399					struct symbol *es = prop_get_symbol(prop);
400					es->rev_dep.expr = expr_alloc_or(es->rev_dep.expr,
401							expr_alloc_and(expr_alloc_symbol(menu->sym), expr_copy(dep)));
402				} else if (prop->type == P_IMPLY) {
403					struct symbol *es = prop_get_symbol(prop);
404					es->implied.expr = expr_alloc_or(es->implied.expr,
405							expr_alloc_and(expr_alloc_symbol(menu->sym), expr_copy(dep)));
406				}
407			}
408		}
409
410		if (sym && sym_is_choice(sym))
411			expr_free(parentdep);
412
413		/*
414		 * Recursively process children in the same fashion before
415		 * moving on
416		 */
417		for (menu = parent->list; menu; menu = menu->next)
418			menu_finalize(menu);
419	} else if (sym) {
420		/*
421		 * Automatic submenu creation. If sym is a symbol and A, B, C,
422		 * ... are consecutive items (symbols, menus, ifs, etc.) that
423		 * all depend on sym, then the following menu structure is
424		 * created:
425		 *
426		 *	sym
427		 *	 +-A
428		 *	 +-B
429		 *	 +-C
430		 *	 ...
431		 *
432		 * This also works recursively, giving the following structure
433		 * if A is a symbol and B depends on A:
434		 *
435		 *	sym
436		 *	 +-A
437		 *	 | +-B
438		 *	 +-C
439		 *	 ...
440		 */
441
442		basedep = parent->prompt ? parent->prompt->visible.expr : NULL;
443		basedep = expr_trans_compare(basedep, E_UNEQUAL, &symbol_no);
444		basedep = expr_eliminate_dups(expr_transform(basedep));
445
446		/* Examine consecutive elements after sym */
447		last_menu = NULL;
448		for (menu = parent->next; menu; menu = menu->next) {
449			dep = menu->prompt ? menu->prompt->visible.expr : menu->dep;
450			if (!expr_contains_symbol(dep, sym))
451				/* No dependency, quit */
452				break;
453			if (expr_depends_symbol(dep, sym))
454				/* Absolute dependency, put in submenu */
455				goto next;
456
457			/*
458			 * Also consider it a dependency on sym if our
459			 * dependencies contain sym and are a "superset" of
460			 * sym's dependencies, e.g. '(sym || Q) && R' when sym
461			 * depends on R.
462			 *
463			 * Note that 'R' might be from an enclosing menu or if,
464			 * making this a more common case than it might seem.
465			 */
466			dep = expr_trans_compare(dep, E_UNEQUAL, &symbol_no);
467			dep = expr_eliminate_dups(expr_transform(dep));
468			dep2 = expr_copy(basedep);
469			expr_eliminate_eq(&dep, &dep2);
470			expr_free(dep);
471			if (!expr_is_yes(dep2)) {
472				/* Not superset, quit */
473				expr_free(dep2);
474				break;
475			}
476			/* Superset, put in submenu */
477			expr_free(dep2);
478		next:
479			menu_finalize(menu);
480			menu->parent = parent;
481			last_menu = menu;
482		}
483		expr_free(basedep);
484		if (last_menu) {
485			parent->list = parent->next;
486			parent->next = last_menu->next;
487			last_menu->next = NULL;
488		}
489
490		sym->dir_dep.expr = expr_alloc_or(sym->dir_dep.expr, parent->dep);
491	}
492	for (menu = parent->list; menu; menu = menu->next) {
493		if (sym && sym_is_choice(sym) &&
494		    menu->sym && !sym_is_choice_value(menu->sym)) {
495			current_entry = menu;
496			menu->sym->flags |= SYMBOL_CHOICEVAL;
497			if (!menu->prompt)
498				menu_warn(menu, "choice value must have a prompt");
499			for (prop = menu->sym->prop; prop; prop = prop->next) {
500				if (prop->type == P_DEFAULT)
501					prop_warn(prop, "defaults for choice "
502						  "values not supported");
503				if (prop->menu == menu)
504					continue;
505				if (prop->type == P_PROMPT &&
506				    prop->menu->parent->sym != sym)
507					prop_warn(prop, "choice value used outside its choice group");
508			}
509			/* Non-tristate choice values of tristate choices must
510			 * depend on the choice being set to Y. The choice
511			 * values' dependencies were propagated to their
512			 * properties above, so the change here must be re-
513			 * propagated.
514			 */
515			if (sym->type == S_TRISTATE && menu->sym->type != S_TRISTATE) {
516				basedep = expr_alloc_comp(E_EQUAL, sym, &symbol_yes);
517				menu->dep = expr_alloc_and(basedep, menu->dep);
518				for (prop = menu->sym->prop; prop; prop = prop->next) {
519					if (prop->menu != menu)
520						continue;
521					prop->visible.expr = expr_alloc_and(expr_copy(basedep),
522									    prop->visible.expr);
523				}
524			}
525			menu_add_symbol(P_CHOICE, sym, NULL);
526			prop = sym_get_choice_prop(sym);
527			for (ep = &prop->expr; *ep; ep = &(*ep)->left.expr)
528				;
529			*ep = expr_alloc_one(E_LIST, NULL);
530			(*ep)->right.sym = menu->sym;
531		}
532
533		/*
534		 * This code serves two purposes:
535		 *
536		 * (1) Flattening 'if' blocks, which do not specify a submenu
537		 *     and only add dependencies.
538		 *
539		 *     (Automatic submenu creation might still create a submenu
540		 *     from an 'if' before this code runs.)
541		 *
542		 * (2) "Undoing" any automatic submenus created earlier below
543		 *     promptless symbols.
544		 *
545		 * Before:
546		 *
547		 *	A
548		 *	if ... (or promptless symbol)
549		 *	 +-B
550		 *	 +-C
551		 *	D
552		 *
553		 * After:
554		 *
555		 *	A
556		 *	if ... (or promptless symbol)
557		 *	B
558		 *	C
559		 *	D
560		 */
561		if (menu->list && (!menu->prompt || !menu->prompt->text)) {
562			for (last_menu = menu->list; ; last_menu = last_menu->next) {
563				last_menu->parent = parent;
564				if (!last_menu->next)
565					break;
566			}
567			last_menu->next = menu->next;
568			menu->next = menu->list;
569			menu->list = NULL;
570		}
571	}
572
573	if (sym && !(sym->flags & SYMBOL_WARNED)) {
574		if (sym->type == S_UNKNOWN)
575			menu_warn(parent, "config symbol defined without type");
576
577		if (sym_is_choice(sym) && !parent->prompt)
578			menu_warn(parent, "choice must have a prompt");
579
580		/* Check properties connected to this symbol */
581		sym_check_prop(sym);
582		sym->flags |= SYMBOL_WARNED;
583	}
584
585	/*
586	 * For non-optional choices, add a reverse dependency (corresponding to
587	 * a select) of '<visibility> && m'. This prevents the user from
588	 * setting the choice mode to 'n' when the choice is visible.
589	 *
590	 * This would also work for non-choice symbols, but only non-optional
591	 * choices clear SYMBOL_OPTIONAL as of writing. Choices are implemented
592	 * as a type of symbol.
593	 */
594	if (sym && !sym_is_optional(sym) && parent->prompt) {
595		sym->rev_dep.expr = expr_alloc_or(sym->rev_dep.expr,
596				expr_alloc_and(parent->prompt->visible.expr,
597					expr_alloc_symbol(&symbol_mod)));
598	}
599}
600
601bool menu_has_prompt(struct menu *menu)
602{
603	if (!menu->prompt)
604		return false;
605	return true;
606}
607
608/*
609 * Determine if a menu is empty.
610 * A menu is considered empty if it contains no or only
611 * invisible entries.
612 */
613bool menu_is_empty(struct menu *menu)
614{
615	struct menu *child;
616
617	for (child = menu->list; child; child = child->next) {
618		if (menu_is_visible(child))
619			return(false);
620	}
621	return(true);
622}
623
624bool menu_is_visible(struct menu *menu)
625{
626	struct menu *child;
627	struct symbol *sym;
628	tristate visible;
629
630	if (!menu->prompt)
631		return false;
632
633	if (menu->visibility) {
634		if (expr_calc_value(menu->visibility) == no)
635			return false;
636	}
637
638	sym = menu->sym;
639	if (sym) {
640		sym_calc_value(sym);
641		visible = menu->prompt->visible.tri;
642	} else
643		visible = menu->prompt->visible.tri = expr_calc_value(menu->prompt->visible.expr);
644
645	if (visible != no)
646		return true;
647
648	if (!sym || sym_get_tristate_value(menu->sym) == no)
649		return false;
650
651	for (child = menu->list; child; child = child->next) {
652		if (menu_is_visible(child)) {
653			if (sym)
654				sym->flags |= SYMBOL_DEF_USER;
655			return true;
656		}
657	}
658
659	return false;
660}
661
662const char *menu_get_prompt(struct menu *menu)
663{
664	if (menu->prompt)
665		return menu->prompt->text;
666	else if (menu->sym)
667		return menu->sym->name;
668	return NULL;
669}
670
671struct menu *menu_get_root_menu(struct menu *menu)
672{
673	return &rootmenu;
674}
675
676struct menu *menu_get_parent_menu(struct menu *menu)
677{
678	enum prop_type type;
679
680	for (; menu != &rootmenu; menu = menu->parent) {
681		type = menu->prompt ? menu->prompt->type : 0;
682		if (type == P_MENU)
683			break;
684	}
685	return menu;
686}
687
688bool menu_has_help(struct menu *menu)
689{
690	return menu->help != NULL;
691}
692
693const char *menu_get_help(struct menu *menu)
694{
695	if (menu->help)
696		return menu->help;
697	else
698		return "";
699}
700
701static void get_prompt_str(struct gstr *r, struct property *prop,
702			   struct list_head *head)
703{
704	int i, j;
705	struct menu *submenu[8], *menu, *location = NULL;
706	struct jump_key *jump = NULL;
707
708	str_printf(r, "Prompt: %s\n", prop->text);
709	menu = prop->menu->parent;
710	for (i = 0; menu != &rootmenu && i < 8; menu = menu->parent) {
711		bool accessible = menu_is_visible(menu);
712
713		submenu[i++] = menu;
714		if (location == NULL && accessible)
715			location = menu;
716	}
717	if (head && location) {
718		jump = xmalloc(sizeof(struct jump_key));
719
720		if (menu_is_visible(prop->menu)) {
721			/*
722			 * There is not enough room to put the hint at the
723			 * beginning of the "Prompt" line. Put the hint on the
724			 * last "Location" line even when it would belong on
725			 * the former.
726			 */
727			jump->target = prop->menu;
728		} else
729			jump->target = location;
730
731		if (list_empty(head))
732			jump->index = 0;
733		else
734			jump->index = list_entry(head->prev, struct jump_key,
735						 entries)->index + 1;
736
737		list_add_tail(&jump->entries, head);
738	}
739
740	if (i > 0) {
741		str_printf(r, "  Location:\n");
742		for (j = 4; --i >= 0; j += 2) {
743			menu = submenu[i];
744			if (jump && menu == location)
745				jump->offset = strlen(r->s);
746			str_printf(r, "%*c-> %s", j, ' ',
747				   menu_get_prompt(menu));
748			if (menu->sym) {
749				str_printf(r, " (%s [=%s])", menu->sym->name ?
750					menu->sym->name : "<choice>",
751					sym_get_string_value(menu->sym));
752			}
753			str_append(r, "\n");
754		}
755	}
756}
757
758/*
759 * get property of type P_SYMBOL
760 */
761static struct property *get_symbol_prop(struct symbol *sym)
762{
763	struct property *prop = NULL;
764
765	for_all_properties(sym, prop, P_SYMBOL)
766		break;
767	return prop;
768}
769
770static void get_symbol_props_str(struct gstr *r, struct symbol *sym,
771				 enum prop_type tok, const char *prefix)
772{
773	bool hit = false;
774	struct property *prop;
775
776	for_all_properties(sym, prop, tok) {
777		if (!hit) {
778			str_append(r, prefix);
779			hit = true;
780		} else
781			str_printf(r, " && ");
782		expr_gstr_print(prop->expr, r);
783	}
784	if (hit)
785		str_append(r, "\n");
786}
787
788/*
789 * head is optional and may be NULL
790 */
791static void get_symbol_str(struct gstr *r, struct symbol *sym,
792		    struct list_head *head)
793{
794	struct property *prop;
795
796	if (sym && sym->name) {
797		str_printf(r, "Symbol: %s [=%s]\n", sym->name,
798			   sym_get_string_value(sym));
799		str_printf(r, "Type  : %s\n", sym_type_name(sym->type));
800		if (sym->type == S_INT || sym->type == S_HEX) {
801			prop = sym_get_range_prop(sym);
802			if (prop) {
803				str_printf(r, "Range : ");
804				expr_gstr_print(prop->expr, r);
805				str_append(r, "\n");
806			}
807		}
808	}
809	for_all_prompts(sym, prop)
810		get_prompt_str(r, prop, head);
811
812	prop = get_symbol_prop(sym);
813	if (prop) {
814		str_printf(r, "  Defined at %s:%d\n", prop->menu->file->name,
815			prop->menu->lineno);
816		if (!expr_is_yes(prop->visible.expr)) {
817			str_append(r, "  Depends on: ");
818			expr_gstr_print(prop->visible.expr, r);
819			str_append(r, "\n");
820		}
821	}
822
823	get_symbol_props_str(r, sym, P_SELECT, "  Selects: ");
824	if (sym->rev_dep.expr) {
825		expr_gstr_print_revdep(sym->rev_dep.expr, r, yes, "  Selected by [y]:\n");
826		expr_gstr_print_revdep(sym->rev_dep.expr, r, mod, "  Selected by [m]:\n");
827		expr_gstr_print_revdep(sym->rev_dep.expr, r, no, "  Selected by [n]:\n");
828	}
829
830	get_symbol_props_str(r, sym, P_IMPLY, "  Implies: ");
831	if (sym->implied.expr) {
832		expr_gstr_print_revdep(sym->implied.expr, r, yes, "  Implied by [y]:\n");
833		expr_gstr_print_revdep(sym->implied.expr, r, mod, "  Implied by [m]:\n");
834		expr_gstr_print_revdep(sym->implied.expr, r, no, "  Implied by [n]:\n");
835	}
836
837	str_append(r, "\n\n");
838}
839
840struct gstr get_relations_str(struct symbol **sym_arr, struct list_head *head)
841{
842	struct symbol *sym;
843	struct gstr res = str_new();
844	int i;
845
846	for (i = 0; sym_arr && (sym = sym_arr[i]); i++)
847		get_symbol_str(&res, sym, head);
848	if (!i)
849		str_append(&res, "No matches found.\n");
850	return res;
851}
852
853
854void menu_get_ext_help(struct menu *menu, struct gstr *help)
855{
856	struct symbol *sym = menu->sym;
857	const char *help_text = nohelp_text;
858
859	if (menu_has_help(menu)) {
860		if (sym->name)
861			str_printf(help, "%s%s:\n\n", CONFIG_, sym->name);
862		help_text = menu_get_help(menu);
863	}
864	str_printf(help, "%s\n", help_text);
865	if (sym)
866		get_symbol_str(help, sym, NULL);
867}