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 = malloc(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, "type of '%s' redefined from '%s' to '%s'",
123	    sym->name ? sym->name : "<choice>",
124	    sym_type_name(sym->type), sym_type_name(type));
125}
126
127struct 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 = menu_check_dep(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				if (!menu->visibility)
150					continue;
151				prop->visible.expr
152					= expr_alloc_and(prop->visible.expr,
153							 menu->visibility);
154			}
155		}
156
157		current_entry->prompt = prop;
158	}
159	prop->text = prompt;
160
161	return prop;
162}
163
164struct property *menu_add_prompt(enum prop_type type, char *prompt, struct expr *dep)
165{
166	return menu_add_prop(type, prompt, NULL, dep);
167}
168
169void menu_add_visibility(struct expr *expr)
170{
171	current_entry->visibility = expr_alloc_and(current_entry->visibility,
172	    expr);
173}
174
175void menu_add_expr(enum prop_type type, struct expr *expr, struct expr *dep)
176{
177	menu_add_prop(type, NULL, expr, dep);
178}
179
180void menu_add_symbol(enum prop_type type, struct symbol *sym, struct expr *dep)
181{
182	menu_add_prop(type, NULL, expr_alloc_symbol(sym), dep);
183}
184
185void menu_add_option(int token, char *arg)
186{
187	struct property *prop;
188
189	switch (token) {
190	case T_OPT_MODULES:
191		prop = prop_alloc(P_DEFAULT, modules_sym);
192		prop->expr = expr_alloc_symbol(current_entry->sym);
193		break;
194	case T_OPT_DEFCONFIG_LIST:
195		if (!sym_defconfig_list)
196			sym_defconfig_list = current_entry->sym;
197		else if (sym_defconfig_list != current_entry->sym)
198			zconf_error("trying to redefine defconfig symbol");
199		break;
200	case T_OPT_ENV:
201		prop_add_env(arg);
202		break;
203	}
204}
205
206static int menu_validate_number(struct symbol *sym, struct symbol *sym2)
207{
208	return sym2->type == S_INT || sym2->type == S_HEX ||
209	       (sym2->type == S_UNKNOWN && sym_string_valid(sym, sym2->name));
210}
211
212static void sym_check_prop(struct symbol *sym)
213{
214	struct property *prop;
215	struct symbol *sym2;
216	for (prop = sym->prop; prop; prop = prop->next) {
217		switch (prop->type) {
218		case P_DEFAULT:
219			if ((sym->type == S_STRING || sym->type == S_INT || sym->type == S_HEX) &&
220			    prop->expr->type != E_SYMBOL)
221				prop_warn(prop,
222				    "default for config symbol '%s'"
223				    " must be a single symbol", sym->name);
224			if (prop->expr->type != E_SYMBOL)
225				break;
226			sym2 = prop_get_symbol(prop);
227			if (sym->type == S_HEX || sym->type == S_INT) {
228				if (!menu_validate_number(sym, sym2))
229					prop_warn(prop,
230					    "'%s': number is invalid",
231					    sym->name);
232			}
233			break;
234		case P_SELECT:
235			sym2 = prop_get_symbol(prop);
236			if (sym->type != S_BOOLEAN && sym->type != S_TRISTATE)
237				prop_warn(prop,
238				    "config symbol '%s' uses select, but is "
239				    "not boolean or tristate", sym->name);
240			else if (sym2->type != S_UNKNOWN &&
241			         sym2->type != S_BOOLEAN &&
242			         sym2->type != S_TRISTATE)
243				prop_warn(prop,
244				    "'%s' has wrong type. 'select' only "
245				    "accept arguments of boolean and "
246				    "tristate type", sym2->name);
247			break;
248		case P_RANGE:
249			if (sym->type != S_INT && sym->type != S_HEX)
250				prop_warn(prop, "range is only allowed "
251				                "for int or hex symbols");
252			if (!menu_validate_number(sym, prop->expr->left.sym) ||
253			    !menu_validate_number(sym, prop->expr->right.sym))
254				prop_warn(prop, "range is invalid");
255			break;
256		default:
257			;
258		}
259	}
260}
261
262void menu_finalize(struct menu *parent)
263{
264	struct menu *menu, *last_menu;
265	struct symbol *sym;
266	struct property *prop;
267	struct expr *parentdep, *basedep, *dep, *dep2, **ep;
268
269	sym = parent->sym;
270	if (parent->list) {
271		if (sym && sym_is_choice(sym)) {
272			if (sym->type == S_UNKNOWN) {
273				/* find the first choice value to find out choice type */
274				current_entry = parent;
275				for (menu = parent->list; menu; menu = menu->next) {
276					if (menu->sym && menu->sym->type != S_UNKNOWN) {
277						menu_set_type(menu->sym->type);
278						break;
279					}
280				}
281			}
282			/* set the type of the remaining choice values */
283			for (menu = parent->list; menu; menu = menu->next) {
284				current_entry = menu;
285				if (menu->sym && menu->sym->type == S_UNKNOWN)
286					menu_set_type(sym->type);
287			}
288			parentdep = expr_alloc_symbol(sym);
289		} else if (parent->prompt)
290			parentdep = parent->prompt->visible.expr;
291		else
292			parentdep = parent->dep;
293
294		for (menu = parent->list; menu; menu = menu->next) {
295			basedep = expr_transform(menu->dep);
296			basedep = expr_alloc_and(expr_copy(parentdep), basedep);
297			basedep = expr_eliminate_dups(basedep);
298			menu->dep = basedep;
299			if (menu->sym)
300				prop = menu->sym->prop;
301			else
302				prop = menu->prompt;
303			for (; prop; prop = prop->next) {
304				if (prop->menu != menu)
305					continue;
306				dep = expr_transform(prop->visible.expr);
307				dep = expr_alloc_and(expr_copy(basedep), dep);
308				dep = expr_eliminate_dups(dep);
309				if (menu->sym && menu->sym->type != S_TRISTATE)
310					dep = expr_trans_bool(dep);
311				prop->visible.expr = dep;
312				if (prop->type == P_SELECT) {
313					struct symbol *es = prop_get_symbol(prop);
314					es->rev_dep.expr = expr_alloc_or(es->rev_dep.expr,
315							expr_alloc_and(expr_alloc_symbol(menu->sym), expr_copy(dep)));
316				}
317			}
318		}
319		for (menu = parent->list; menu; menu = menu->next)
320			menu_finalize(menu);
321	} else if (sym) {
322		basedep = parent->prompt ? parent->prompt->visible.expr : NULL;
323		basedep = expr_trans_compare(basedep, E_UNEQUAL, &symbol_no);
324		basedep = expr_eliminate_dups(expr_transform(basedep));
325		last_menu = NULL;
326		for (menu = parent->next; menu; menu = menu->next) {
327			dep = menu->prompt ? menu->prompt->visible.expr : menu->dep;
328			if (!expr_contains_symbol(dep, sym))
329				break;
330			if (expr_depends_symbol(dep, sym))
331				goto next;
332			dep = expr_trans_compare(dep, E_UNEQUAL, &symbol_no);
333			dep = expr_eliminate_dups(expr_transform(dep));
334			dep2 = expr_copy(basedep);
335			expr_eliminate_eq(&dep, &dep2);
336			expr_free(dep);
337			if (!expr_is_yes(dep2)) {
338				expr_free(dep2);
339				break;
340			}
341			expr_free(dep2);
342		next:
343			menu_finalize(menu);
344			menu->parent = parent;
345			last_menu = menu;
346		}
347		if (last_menu) {
348			parent->list = parent->next;
349			parent->next = last_menu->next;
350			last_menu->next = NULL;
351		}
352
353		sym->dir_dep.expr = expr_alloc_or(sym->dir_dep.expr, parent->dep);
354	}
355	for (menu = parent->list; menu; menu = menu->next) {
356		if (sym && sym_is_choice(sym) &&
357		    menu->sym && !sym_is_choice_value(menu->sym)) {
358			current_entry = menu;
359			menu->sym->flags |= SYMBOL_CHOICEVAL;
360			if (!menu->prompt)
361				menu_warn(menu, "choice value must have a prompt");
362			for (prop = menu->sym->prop; prop; prop = prop->next) {
363				if (prop->type == P_DEFAULT)
364					prop_warn(prop, "defaults for choice "
365						  "values not supported");
366				if (prop->menu == menu)
367					continue;
368				if (prop->type == P_PROMPT &&
369				    prop->menu->parent->sym != sym)
370					prop_warn(prop, "choice value used outside its choice group");
371			}
372			/* Non-tristate choice values of tristate choices must
373			 * depend on the choice being set to Y. The choice
374			 * values' dependencies were propagated to their
375			 * properties above, so the change here must be re-
376			 * propagated.
377			 */
378			if (sym->type == S_TRISTATE && menu->sym->type != S_TRISTATE) {
379				basedep = expr_alloc_comp(E_EQUAL, sym, &symbol_yes);
380				menu->dep = expr_alloc_and(basedep, menu->dep);
381				for (prop = menu->sym->prop; prop; prop = prop->next) {
382					if (prop->menu != menu)
383						continue;
384					prop->visible.expr = expr_alloc_and(expr_copy(basedep),
385									    prop->visible.expr);
386				}
387			}
388			menu_add_symbol(P_CHOICE, sym, NULL);
389			prop = sym_get_choice_prop(sym);
390			for (ep = &prop->expr; *ep; ep = &(*ep)->left.expr)
391				;
392			*ep = expr_alloc_one(E_LIST, NULL);
393			(*ep)->right.sym = menu->sym;
394		}
395		if (menu->list && (!menu->prompt || !menu->prompt->text)) {
396			for (last_menu = menu->list; ; last_menu = last_menu->next) {
397				last_menu->parent = parent;
398				if (!last_menu->next)
399					break;
400			}
401			last_menu->next = menu->next;
402			menu->next = menu->list;
403			menu->list = NULL;
404		}
405	}
406
407	if (sym && !(sym->flags & SYMBOL_WARNED)) {
408		if (sym->type == S_UNKNOWN)
409			menu_warn(parent, "config symbol defined without type");
410
411		if (sym_is_choice(sym) && !parent->prompt)
412			menu_warn(parent, "choice must have a prompt");
413
414		/* Check properties connected to this symbol */
415		sym_check_prop(sym);
416		sym->flags |= SYMBOL_WARNED;
417	}
418
419	if (sym && !sym_is_optional(sym) && parent->prompt) {
420		sym->rev_dep.expr = expr_alloc_or(sym->rev_dep.expr,
421				expr_alloc_and(parent->prompt->visible.expr,
422					expr_alloc_symbol(&symbol_mod)));
423	}
424}
425
426bool menu_has_prompt(struct menu *menu)
427{
428	if (!menu->prompt)
429		return false;
430	return true;
431}
432
433bool menu_is_visible(struct menu *menu)
434{
435	struct menu *child;
436	struct symbol *sym;
437	tristate visible;
438
439	if (!menu->prompt)
440		return false;
441
442	if (menu->visibility) {
443		if (expr_calc_value(menu->visibility) == no)
444			return no;
445	}
446
447	sym = menu->sym;
448	if (sym) {
449		sym_calc_value(sym);
450		visible = menu->prompt->visible.tri;
451	} else
452		visible = menu->prompt->visible.tri = expr_calc_value(menu->prompt->visible.expr);
453
454	if (visible != no)
455		return true;
456
457	if (!sym || sym_get_tristate_value(menu->sym) == no)
458		return false;
459
460	for (child = menu->list; child; child = child->next) {
461		if (menu_is_visible(child)) {
462			if (sym)
463				sym->flags |= SYMBOL_DEF_USER;
464			return true;
465		}
466	}
467
468	return false;
469}
470
471const char *menu_get_prompt(struct menu *menu)
472{
473	if (menu->prompt)
474		return menu->prompt->text;
475	else if (menu->sym)
476		return menu->sym->name;
477	return NULL;
478}
479
480struct menu *menu_get_root_menu(struct menu *menu)
481{
482	return &rootmenu;
483}
484
485struct menu *menu_get_parent_menu(struct menu *menu)
486{
487	enum prop_type type;
488
489	for (; menu != &rootmenu; menu = menu->parent) {
490		type = menu->prompt ? menu->prompt->type : 0;
491		if (type == P_MENU)
492			break;
493	}
494	return menu;
495}
496
497bool menu_has_help(struct menu *menu)
498{
499	return menu->help != NULL;
500}
501
502const char *menu_get_help(struct menu *menu)
503{
504	if (menu->help)
505		return menu->help;
506	else
507		return "";
508}
509
510static void get_prompt_str(struct gstr *r, struct property *prop)
511{
512	int i, j;
513	struct menu *submenu[8], *menu;
514
515	str_printf(r, _("Prompt: %s\n"), _(prop->text));
516	str_printf(r, _("  Defined at %s:%d\n"), prop->menu->file->name,
517		prop->menu->lineno);
518	if (!expr_is_yes(prop->visible.expr)) {
519		str_append(r, _("  Depends on: "));
520		expr_gstr_print(prop->visible.expr, r);
521		str_append(r, "\n");
522	}
523	menu = prop->menu->parent;
524	for (i = 0; menu != &rootmenu && i < 8; menu = menu->parent)
525		submenu[i++] = menu;
526	if (i > 0) {
527		str_printf(r, _("  Location:\n"));
528		for (j = 4; --i >= 0; j += 2) {
529			menu = submenu[i];
530			str_printf(r, "%*c-> %s", j, ' ', _(menu_get_prompt(menu)));
531			if (menu->sym) {
532				str_printf(r, " (%s [=%s])", menu->sym->name ?
533					menu->sym->name : _("<choice>"),
534					sym_get_string_value(menu->sym));
535			}
536			str_append(r, "\n");
537		}
538	}
539}
540
541void get_symbol_str(struct gstr *r, struct symbol *sym)
542{
543	bool hit;
544	struct property *prop;
545
546	if (sym && sym->name) {
547		str_printf(r, "Symbol: %s [=%s]\n", sym->name,
548			   sym_get_string_value(sym));
549		str_printf(r, "Type  : %s\n", sym_type_name(sym->type));
550		if (sym->type == S_INT || sym->type == S_HEX) {
551			prop = sym_get_range_prop(sym);
552			if (prop) {
553				str_printf(r, "Range : ");
554				expr_gstr_print(prop->expr, r);
555				str_append(r, "\n");
556			}
557		}
558	}
559	for_all_prompts(sym, prop)
560		get_prompt_str(r, prop);
561	hit = false;
562	for_all_properties(sym, prop, P_SELECT) {
563		if (!hit) {
564			str_append(r, "  Selects: ");
565			hit = true;
566		} else
567			str_printf(r, " && ");
568		expr_gstr_print(prop->expr, r);
569	}
570	if (hit)
571		str_append(r, "\n");
572	if (sym->rev_dep.expr) {
573		str_append(r, _("  Selected by: "));
574		expr_gstr_print(sym->rev_dep.expr, r);
575		str_append(r, "\n");
576	}
577	str_append(r, "\n\n");
578}
579
580struct gstr get_relations_str(struct symbol **sym_arr)
581{
582	struct symbol *sym;
583	struct gstr res = str_new();
584	int i;
585
586	for (i = 0; sym_arr && (sym = sym_arr[i]); i++)
587		get_symbol_str(&res, sym);
588	if (!i)
589		str_append(&res, _("No matches found.\n"));
590	return res;
591}
592
593
594void menu_get_ext_help(struct menu *menu, struct gstr *help)
595{
596	struct symbol *sym = menu->sym;
597	const char *help_text = nohelp_text;
598
599	if (menu_has_help(menu)) {
600		if (sym->name)
601			str_printf(help, "%s%s:\n\n", CONFIG_, sym->name);
602		help_text = menu_get_help(menu);
603	}
604	str_printf(help, "%s\n", _(help_text));
605	if (sym)
606		get_symbol_str(help, sym);
607}
608