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
 65void menu_end_entry(void)
 66{
 67}
 68
 69struct menu *menu_add_menu(void)
 70{
 71	menu_end_entry();
 72	last_entry_ptr = &current_entry->list;
 73	return current_menu = current_entry;
 74}
 75
 76void menu_end_menu(void)
 77{
 78	last_entry_ptr = &current_menu->next;
 79	current_menu = current_menu->parent;
 80}
 81
 82static struct expr *menu_check_dep(struct expr *e)
 83{
 84	if (!e)
 85		return e;
 86
 87	switch (e->type) {
 88	case E_NOT:
 89		e->left.expr = menu_check_dep(e->left.expr);
 90		break;
 91	case E_OR:
 92	case E_AND:
 93		e->left.expr = menu_check_dep(e->left.expr);
 94		e->right.expr = menu_check_dep(e->right.expr);
 95		break;
 96	case E_SYMBOL:
 97		/* change 'm' into 'm' && MODULES */
 98		if (e->left.sym == &symbol_mod)
 99			return expr_alloc_and(e, expr_alloc_symbol(modules_sym));
100		break;
101	default:
102		break;
103	}
104	return e;
105}
106
107void menu_add_dep(struct expr *dep)
108{
109	current_entry->dep = expr_alloc_and(current_entry->dep, menu_check_dep(dep));
110}
111
112void menu_set_type(int type)
113{
114	struct symbol *sym = current_entry->sym;
115
116	if (sym->type == type)
117		return;
118	if (sym->type == S_UNKNOWN) {
119		sym->type = type;
120		return;
121	}
122	menu_warn(current_entry,
123		"ignoring type redefinition of '%s' from '%s' to '%s'",
124		sym->name ? sym->name : "<choice>",
125		sym_type_name(sym->type), sym_type_name(type));
126}
127
128static struct property *menu_add_prop(enum prop_type type, char *prompt, struct expr *expr, struct expr *dep)
129{
130	struct property *prop = prop_alloc(type, current_entry->sym);
131
132	prop->menu = current_entry;
133	prop->expr = expr;
134	prop->visible.expr = menu_check_dep(dep);
135
136	if (prompt) {
137		if (isspace(*prompt)) {
138			prop_warn(prop, "leading whitespace ignored");
139			while (isspace(*prompt))
140				prompt++;
141		}
142		if (current_entry->prompt && current_entry != &rootmenu)
143			prop_warn(prop, "prompt redefined");
144
145		/* Apply all upper menus' visibilities to actual prompts. */
146		if(type == P_PROMPT) {
147			struct menu *menu = current_entry;
148
149			while ((menu = menu->parent) != NULL) {
150				struct expr *dup_expr;
151
152				if (!menu->visibility)
153					continue;
154				/*
155				 * Do not add a reference to the
156				 * menu's visibility expression but
157				 * use a copy of it.  Otherwise the
158				 * expression reduction functions
159				 * will modify expressions that have
160				 * multiple references which can
161				 * cause unwanted side effects.
162				 */
163				dup_expr = expr_copy(menu->visibility);
164
165				prop->visible.expr
166					= expr_alloc_and(prop->visible.expr,
167							 dup_expr);
168			}
169		}
170
171		current_entry->prompt = prop;
172	}
173	prop->text = prompt;
174
175	return prop;
176}
177
178struct property *menu_add_prompt(enum prop_type type, char *prompt, struct expr *dep)
179{
180	return menu_add_prop(type, prompt, NULL, dep);
181}
182
183void menu_add_visibility(struct expr *expr)
184{
185	current_entry->visibility = expr_alloc_and(current_entry->visibility,
186	    expr);
187}
188
189void menu_add_expr(enum prop_type type, struct expr *expr, struct expr *dep)
190{
191	menu_add_prop(type, NULL, expr, dep);
192}
193
194void menu_add_symbol(enum prop_type type, struct symbol *sym, struct expr *dep)
195{
196	menu_add_prop(type, NULL, expr_alloc_symbol(sym), dep);
197}
198
199void menu_add_option(int token, char *arg)
200{
 
 
201	switch (token) {
202	case T_OPT_MODULES:
203		if (modules_sym)
204			zconf_error("symbol '%s' redefines option 'modules'"
205				    " already defined by symbol '%s'",
206				    current_entry->sym->name,
207				    modules_sym->name
208				    );
209		modules_sym = current_entry->sym;
210		break;
211	case T_OPT_DEFCONFIG_LIST:
212		if (!sym_defconfig_list)
213			sym_defconfig_list = current_entry->sym;
214		else if (sym_defconfig_list != current_entry->sym)
215			zconf_error("trying to redefine defconfig symbol");
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			break;
256		case P_SELECT:
257		case P_IMPLY:
258			use = prop->type == P_SELECT ? "select" : "imply";
259			sym2 = prop_get_symbol(prop);
260			if (sym->type != S_BOOLEAN && sym->type != S_TRISTATE)
261				prop_warn(prop,
262				    "config symbol '%s' uses %s, but is "
263				    "not boolean or tristate", sym->name, use);
264			else if (sym2->type != S_UNKNOWN &&
265				 sym2->type != S_BOOLEAN &&
266				 sym2->type != S_TRISTATE)
267				prop_warn(prop,
268				    "'%s' has wrong type. '%s' only "
269				    "accept arguments of boolean and "
270				    "tristate type", sym2->name, use);
271			break;
272		case P_RANGE:
273			if (sym->type != S_INT && sym->type != S_HEX)
274				prop_warn(prop, "range is only allowed "
275						"for int or hex symbols");
276			if (!menu_validate_number(sym, prop->expr->left.sym) ||
277			    !menu_validate_number(sym, prop->expr->right.sym))
278				prop_warn(prop, "range is invalid");
279			break;
280		default:
281			;
282		}
283	}
284}
285
286void menu_finalize(struct menu *parent)
287{
288	struct menu *menu, *last_menu;
289	struct symbol *sym;
290	struct property *prop;
291	struct expr *parentdep, *basedep, *dep, *dep2, **ep;
292
293	sym = parent->sym;
294	if (parent->list) {
295		if (sym && sym_is_choice(sym)) {
296			if (sym->type == S_UNKNOWN) {
297				/* find the first choice value to find out choice type */
298				current_entry = parent;
299				for (menu = parent->list; menu; menu = menu->next) {
300					if (menu->sym && menu->sym->type != S_UNKNOWN) {
301						menu_set_type(menu->sym->type);
302						break;
303					}
304				}
305			}
306			/* set the type of the remaining choice values */
307			for (menu = parent->list; menu; menu = menu->next) {
308				current_entry = menu;
309				if (menu->sym && menu->sym->type == S_UNKNOWN)
310					menu_set_type(sym->type);
311			}
312			parentdep = expr_alloc_symbol(sym);
313		} else if (parent->prompt)
314			parentdep = parent->prompt->visible.expr;
315		else
316			parentdep = parent->dep;
317
318		for (menu = parent->list; menu; menu = menu->next) {
319			basedep = expr_transform(menu->dep);
320			basedep = expr_alloc_and(expr_copy(parentdep), basedep);
321			basedep = expr_eliminate_dups(basedep);
322			menu->dep = basedep;
323			if (menu->sym)
324				prop = menu->sym->prop;
325			else
326				prop = menu->prompt;
327			for (; prop; prop = prop->next) {
328				if (prop->menu != menu)
329					continue;
330				dep = expr_transform(prop->visible.expr);
331				dep = expr_alloc_and(expr_copy(basedep), dep);
332				dep = expr_eliminate_dups(dep);
333				if (menu->sym && menu->sym->type != S_TRISTATE)
334					dep = expr_trans_bool(dep);
335				prop->visible.expr = dep;
336				if (prop->type == P_SELECT) {
337					struct symbol *es = prop_get_symbol(prop);
338					es->rev_dep.expr = expr_alloc_or(es->rev_dep.expr,
339							expr_alloc_and(expr_alloc_symbol(menu->sym), expr_copy(dep)));
340				} else if (prop->type == P_IMPLY) {
341					struct symbol *es = prop_get_symbol(prop);
342					es->implied.expr = expr_alloc_or(es->implied.expr,
343							expr_alloc_and(expr_alloc_symbol(menu->sym), expr_copy(dep)));
344				}
345			}
346		}
347		for (menu = parent->list; menu; menu = menu->next)
348			menu_finalize(menu);
349	} else if (sym) {
350		basedep = parent->prompt ? parent->prompt->visible.expr : NULL;
351		basedep = expr_trans_compare(basedep, E_UNEQUAL, &symbol_no);
352		basedep = expr_eliminate_dups(expr_transform(basedep));
353		last_menu = NULL;
354		for (menu = parent->next; menu; menu = menu->next) {
355			dep = menu->prompt ? menu->prompt->visible.expr : menu->dep;
356			if (!expr_contains_symbol(dep, sym))
357				break;
358			if (expr_depends_symbol(dep, sym))
359				goto next;
360			dep = expr_trans_compare(dep, E_UNEQUAL, &symbol_no);
361			dep = expr_eliminate_dups(expr_transform(dep));
362			dep2 = expr_copy(basedep);
363			expr_eliminate_eq(&dep, &dep2);
364			expr_free(dep);
365			if (!expr_is_yes(dep2)) {
366				expr_free(dep2);
367				break;
368			}
369			expr_free(dep2);
370		next:
371			menu_finalize(menu);
372			menu->parent = parent;
373			last_menu = menu;
374		}
375		if (last_menu) {
376			parent->list = parent->next;
377			parent->next = last_menu->next;
378			last_menu->next = NULL;
379		}
380
381		sym->dir_dep.expr = expr_alloc_or(sym->dir_dep.expr, parent->dep);
382	}
383	for (menu = parent->list; menu; menu = menu->next) {
384		if (sym && sym_is_choice(sym) &&
385		    menu->sym && !sym_is_choice_value(menu->sym)) {
386			current_entry = menu;
387			menu->sym->flags |= SYMBOL_CHOICEVAL;
388			if (!menu->prompt)
389				menu_warn(menu, "choice value must have a prompt");
390			for (prop = menu->sym->prop; prop; prop = prop->next) {
391				if (prop->type == P_DEFAULT)
392					prop_warn(prop, "defaults for choice "
393						  "values not supported");
394				if (prop->menu == menu)
395					continue;
396				if (prop->type == P_PROMPT &&
397				    prop->menu->parent->sym != sym)
398					prop_warn(prop, "choice value used outside its choice group");
399			}
400			/* Non-tristate choice values of tristate choices must
401			 * depend on the choice being set to Y. The choice
402			 * values' dependencies were propagated to their
403			 * properties above, so the change here must be re-
404			 * propagated.
405			 */
406			if (sym->type == S_TRISTATE && menu->sym->type != S_TRISTATE) {
407				basedep = expr_alloc_comp(E_EQUAL, sym, &symbol_yes);
408				menu->dep = expr_alloc_and(basedep, menu->dep);
409				for (prop = menu->sym->prop; prop; prop = prop->next) {
410					if (prop->menu != menu)
411						continue;
412					prop->visible.expr = expr_alloc_and(expr_copy(basedep),
413									    prop->visible.expr);
414				}
415			}
416			menu_add_symbol(P_CHOICE, sym, NULL);
417			prop = sym_get_choice_prop(sym);
418			for (ep = &prop->expr; *ep; ep = &(*ep)->left.expr)
419				;
420			*ep = expr_alloc_one(E_LIST, NULL);
421			(*ep)->right.sym = menu->sym;
422		}
423		if (menu->list && (!menu->prompt || !menu->prompt->text)) {
424			for (last_menu = menu->list; ; last_menu = last_menu->next) {
425				last_menu->parent = parent;
426				if (!last_menu->next)
427					break;
428			}
429			last_menu->next = menu->next;
430			menu->next = menu->list;
431			menu->list = NULL;
432		}
433	}
434
435	if (sym && !(sym->flags & SYMBOL_WARNED)) {
436		if (sym->type == S_UNKNOWN)
437			menu_warn(parent, "config symbol defined without type");
438
439		if (sym_is_choice(sym) && !parent->prompt)
440			menu_warn(parent, "choice must have a prompt");
441
442		/* Check properties connected to this symbol */
443		sym_check_prop(sym);
444		sym->flags |= SYMBOL_WARNED;
445	}
446
447	if (sym && !sym_is_optional(sym) && parent->prompt) {
448		sym->rev_dep.expr = expr_alloc_or(sym->rev_dep.expr,
449				expr_alloc_and(parent->prompt->visible.expr,
450					expr_alloc_symbol(&symbol_mod)));
451	}
452}
453
454bool menu_has_prompt(struct menu *menu)
455{
456	if (!menu->prompt)
457		return false;
458	return true;
459}
460
461/*
462 * Determine if a menu is empty.
463 * A menu is considered empty if it contains no or only
464 * invisible entries.
465 */
466bool menu_is_empty(struct menu *menu)
467{
468	struct menu *child;
469
470	for (child = menu->list; child; child = child->next) {
471		if (menu_is_visible(child))
472			return(false);
473	}
474	return(true);
475}
476
477bool menu_is_visible(struct menu *menu)
478{
479	struct menu *child;
480	struct symbol *sym;
481	tristate visible;
482
483	if (!menu->prompt)
484		return false;
485
486	if (menu->visibility) {
487		if (expr_calc_value(menu->visibility) == no)
488			return false;
489	}
490
491	sym = menu->sym;
492	if (sym) {
493		sym_calc_value(sym);
494		visible = menu->prompt->visible.tri;
495	} else
496		visible = menu->prompt->visible.tri = expr_calc_value(menu->prompt->visible.expr);
497
498	if (visible != no)
499		return true;
500
501	if (!sym || sym_get_tristate_value(menu->sym) == no)
502		return false;
503
504	for (child = menu->list; child; child = child->next) {
505		if (menu_is_visible(child)) {
506			if (sym)
507				sym->flags |= SYMBOL_DEF_USER;
508			return true;
509		}
510	}
511
512	return false;
513}
514
515const char *menu_get_prompt(struct menu *menu)
516{
517	if (menu->prompt)
518		return menu->prompt->text;
519	else if (menu->sym)
520		return menu->sym->name;
521	return NULL;
522}
523
524struct menu *menu_get_root_menu(struct menu *menu)
525{
526	return &rootmenu;
527}
528
529struct menu *menu_get_parent_menu(struct menu *menu)
530{
531	enum prop_type type;
532
533	for (; menu != &rootmenu; menu = menu->parent) {
534		type = menu->prompt ? menu->prompt->type : 0;
535		if (type == P_MENU)
536			break;
537	}
538	return menu;
539}
540
541bool menu_has_help(struct menu *menu)
542{
543	return menu->help != NULL;
544}
545
546const char *menu_get_help(struct menu *menu)
547{
548	if (menu->help)
549		return menu->help;
550	else
551		return "";
552}
553
554static void get_prompt_str(struct gstr *r, struct property *prop,
555			   struct list_head *head)
556{
557	int i, j;
558	struct menu *submenu[8], *menu, *location = NULL;
559	struct jump_key *jump = NULL;
560
561	str_printf(r, _("Prompt: %s\n"), _(prop->text));
 
 
 
 
 
 
 
562	menu = prop->menu->parent;
563	for (i = 0; menu != &rootmenu && i < 8; menu = menu->parent) {
564		bool accessible = menu_is_visible(menu);
565
566		submenu[i++] = menu;
567		if (location == NULL && accessible)
568			location = menu;
569	}
570	if (head && location) {
571		jump = xmalloc(sizeof(struct jump_key));
572
573		if (menu_is_visible(prop->menu)) {
574			/*
575			 * There is not enough room to put the hint at the
576			 * beginning of the "Prompt" line. Put the hint on the
577			 * last "Location" line even when it would belong on
578			 * the former.
579			 */
580			jump->target = prop->menu;
581		} else
582			jump->target = location;
583
584		if (list_empty(head))
585			jump->index = 0;
586		else
587			jump->index = list_entry(head->prev, struct jump_key,
588						 entries)->index + 1;
589
590		list_add_tail(&jump->entries, head);
591	}
592
593	if (i > 0) {
594		str_printf(r, _("  Location:\n"));
595		for (j = 4; --i >= 0; j += 2) {
596			menu = submenu[i];
597			if (jump && menu == location)
598				jump->offset = strlen(r->s);
599			str_printf(r, "%*c-> %s", j, ' ',
600				   _(menu_get_prompt(menu)));
601			if (menu->sym) {
602				str_printf(r, " (%s [=%s])", menu->sym->name ?
603					menu->sym->name : _("<choice>"),
604					sym_get_string_value(menu->sym));
605			}
606			str_append(r, "\n");
607		}
608	}
609}
610
611/*
612 * get property of type P_SYMBOL
613 */
614static struct property *get_symbol_prop(struct symbol *sym)
615{
616	struct property *prop = NULL;
617
618	for_all_properties(sym, prop, P_SYMBOL)
619		break;
620	return prop;
621}
622
623static void get_symbol_props_str(struct gstr *r, struct symbol *sym,
624				 enum prop_type tok, const char *prefix)
625{
626	bool hit = false;
627	struct property *prop;
628
629	for_all_properties(sym, prop, tok) {
630		if (!hit) {
631			str_append(r, prefix);
632			hit = true;
633		} else
634			str_printf(r, " && ");
635		expr_gstr_print(prop->expr, r);
636	}
637	if (hit)
638		str_append(r, "\n");
639}
640
641/*
642 * head is optional and may be NULL
643 */
644static void get_symbol_str(struct gstr *r, struct symbol *sym,
645		    struct list_head *head)
646{
 
647	struct property *prop;
648
649	if (sym && sym->name) {
650		str_printf(r, "Symbol: %s [=%s]\n", sym->name,
651			   sym_get_string_value(sym));
652		str_printf(r, "Type  : %s\n", sym_type_name(sym->type));
653		if (sym->type == S_INT || sym->type == S_HEX) {
654			prop = sym_get_range_prop(sym);
655			if (prop) {
656				str_printf(r, "Range : ");
657				expr_gstr_print(prop->expr, r);
658				str_append(r, "\n");
659			}
660		}
661	}
662	for_all_prompts(sym, prop)
663		get_prompt_str(r, prop, head);
664
665	prop = get_symbol_prop(sym);
666	if (prop) {
667		str_printf(r, _("  Defined at %s:%d\n"), prop->menu->file->name,
668			prop->menu->lineno);
669		if (!expr_is_yes(prop->visible.expr)) {
670			str_append(r, _("  Depends on: "));
671			expr_gstr_print(prop->visible.expr, r);
672			str_append(r, "\n");
673		}
674	}
675
676	get_symbol_props_str(r, sym, P_SELECT, _("  Selects: "));
677	if (sym->rev_dep.expr) {
678		str_append(r, _("  Selected by: "));
679		expr_gstr_print(sym->rev_dep.expr, r);
680		str_append(r, "\n");
681	}
682
683	get_symbol_props_str(r, sym, P_IMPLY, _("  Implies: "));
684	if (sym->implied.expr) {
685		str_append(r, _("  Implied by: "));
686		expr_gstr_print(sym->implied.expr, r);
687		str_append(r, "\n");
688	}
689
690	str_append(r, "\n\n");
691}
692
693struct gstr get_relations_str(struct symbol **sym_arr, struct list_head *head)
694{
695	struct symbol *sym;
696	struct gstr res = str_new();
697	int i;
698
699	for (i = 0; sym_arr && (sym = sym_arr[i]); i++)
700		get_symbol_str(&res, sym, head);
701	if (!i)
702		str_append(&res, _("No matches found.\n"));
703	return res;
704}
705
706
707void menu_get_ext_help(struct menu *menu, struct gstr *help)
708{
709	struct symbol *sym = menu->sym;
710	const char *help_text = nohelp_text;
711
712	if (menu_has_help(menu)) {
713		if (sym->name)
714			str_printf(help, "%s%s:\n\n", CONFIG_, sym->name);
715		help_text = menu_get_help(menu);
716	}
717	str_printf(help, "%s\n", _(help_text));
718	if (sym)
719		get_symbol_str(help, sym, NULL);
720}