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 <stdlib.h>
7#include <string.h>
8
9#define LKC_DIRECT_LINK
10#include "lkc.h"
11
12struct menu rootmenu;
13static struct menu **last_entry_ptr;
14
15struct file *file_list;
16struct file *current_file;
17
18static void menu_warn(struct menu *menu, const char *fmt, ...)
19{
20	va_list ap;
21	va_start(ap, fmt);
22	fprintf(stderr, "%s:%d:warning: ", menu->file->name, menu->lineno);
23	vfprintf(stderr, fmt, ap);
24	fprintf(stderr, "\n");
25	va_end(ap);
26}
27
28static void prop_warn(struct property *prop, const char *fmt, ...)
29{
30	va_list ap;
31	va_start(ap, fmt);
32	fprintf(stderr, "%s:%d:warning: ", prop->file->name, prop->lineno);
33	vfprintf(stderr, fmt, ap);
34	fprintf(stderr, "\n");
35	va_end(ap);
36}
37
38void menu_init(void)
39{
40	current_entry = current_menu = &rootmenu;
41	last_entry_ptr = &rootmenu.list;
42}
43
44void menu_add_entry(struct symbol *sym)
45{
46	struct menu *menu;
47
48	menu = malloc(sizeof(*menu));
49	memset(menu, 0, sizeof(*menu));
50	menu->sym = sym;
51	menu->parent = current_menu;
52	menu->file = current_file;
53	menu->lineno = zconf_lineno();
54
55	*last_entry_ptr = menu;
56	last_entry_ptr = &menu->next;
57	current_entry = menu;
58}
59
60void menu_end_entry(void)
61{
62}
63
64struct menu *menu_add_menu(void)
65{
66	menu_end_entry();
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
77struct expr *menu_check_dep(struct expr *e)
78{
79	if (!e)
80		return e;
81
82	switch (e->type) {
83	case E_NOT:
84		e->left.expr = menu_check_dep(e->left.expr);
85		break;
86	case E_OR:
87	case E_AND:
88		e->left.expr = menu_check_dep(e->left.expr);
89		e->right.expr = menu_check_dep(e->right.expr);
90		break;
91	case E_SYMBOL:
92		/* change 'm' into 'm' && MODULES */
93		if (e->left.sym == &symbol_mod)
94			return expr_alloc_and(e, expr_alloc_symbol(modules_sym));
95		break;
96	default:
97		break;
98	}
99	return e;
100}
101
102void menu_add_dep(struct expr *dep)
103{
104	current_entry->dep = expr_alloc_and(current_entry->dep, menu_check_dep(dep));
105}
106
107void menu_set_type(int type)
108{
109	struct symbol *sym = current_entry->sym;
110
111	if (sym->type == type)
112		return;
113	if (sym->type == S_UNKNOWN) {
114		sym->type = type;
115		return;
116	}
117	menu_warn(current_entry, "type of '%s' redefined from '%s' to '%s'",
118	    sym->name ? sym->name : "<choice>",
119	    sym_type_name(sym->type), sym_type_name(type));
120}
121
122struct property *menu_add_prop(enum prop_type type, char *prompt, struct expr *expr, struct expr *dep)
123{
124	struct property *prop = prop_alloc(type, current_entry->sym);
125
126	prop->menu = current_entry;
127	prop->expr = expr;
128	prop->visible.expr = menu_check_dep(dep);
129
130	if (prompt) {
131		if (isspace(*prompt)) {
132			prop_warn(prop, "leading whitespace ignored");
133			while (isspace(*prompt))
134				prompt++;
135		}
136		if (current_entry->prompt)
137			prop_warn(prop, "prompt redefined");
138		current_entry->prompt = prop;
139	}
140	prop->text = prompt;
141
142	return prop;
143}
144
145struct property *menu_add_prompt(enum prop_type type, char *prompt, struct expr *dep)
146{
147	return menu_add_prop(type, prompt, NULL, dep);
148}
149
150void menu_add_expr(enum prop_type type, struct expr *expr, struct expr *dep)
151{
152	menu_add_prop(type, NULL, expr, dep);
153}
154
155void menu_add_symbol(enum prop_type type, struct symbol *sym, struct expr *dep)
156{
157	menu_add_prop(type, NULL, expr_alloc_symbol(sym), dep);
158}
159
160void menu_add_option(int token, char *arg)
161{
162	struct property *prop;
163
164	switch (token) {
165	case T_OPT_MODULES:
166		prop = prop_alloc(P_DEFAULT, modules_sym);
167		prop->expr = expr_alloc_symbol(current_entry->sym);
168		break;
169	case T_OPT_DEFCONFIG_LIST:
170		if (!sym_defconfig_list)
171			sym_defconfig_list = current_entry->sym;
172		else if (sym_defconfig_list != current_entry->sym)
173			zconf_error("trying to redefine defconfig symbol");
174		break;
175	}
176}
177
178static int menu_range_valid_sym(struct symbol *sym, struct symbol *sym2)
179{
180	return sym2->type == S_INT || sym2->type == S_HEX ||
181	       (sym2->type == S_UNKNOWN && sym_string_valid(sym, sym2->name));
182}
183
184void sym_check_prop(struct symbol *sym)
185{
186	struct property *prop;
187	struct symbol *sym2;
188	for (prop = sym->prop; prop; prop = prop->next) {
189		switch (prop->type) {
190		case P_DEFAULT:
191			if ((sym->type == S_STRING || sym->type == S_INT || sym->type == S_HEX) &&
192			    prop->expr->type != E_SYMBOL)
193				prop_warn(prop,
194				    "default for config symbol '%'"
195				    " must be a single symbol", sym->name);
196			break;
197		case P_SELECT:
198			sym2 = prop_get_symbol(prop);
199			if (sym->type != S_BOOLEAN && sym->type != S_TRISTATE)
200				prop_warn(prop,
201				    "config symbol '%s' uses select, but is "
202				    "not boolean or tristate", sym->name);
203			else if (sym2->type == S_UNKNOWN)
204				prop_warn(prop,
205				    "'select' used by config symbol '%s' "
206				    "refers to undefined symbol '%s'",
207				    sym->name, sym2->name);
208			else if (sym2->type != S_BOOLEAN && sym2->type != S_TRISTATE)
209				prop_warn(prop,
210				    "'%s' has wrong type. 'select' only "
211				    "accept arguments of boolean and "
212				    "tristate type", sym2->name);
213			break;
214		case P_RANGE:
215			if (sym->type != S_INT && sym->type != S_HEX)
216				prop_warn(prop, "range is only allowed "
217				                "for int or hex symbols");
218			if (!menu_range_valid_sym(sym, prop->expr->left.sym) ||
219			    !menu_range_valid_sym(sym, prop->expr->right.sym))
220				prop_warn(prop, "range is invalid");
221			break;
222		default:
223			;
224		}
225	}
226}
227
228void menu_finalize(struct menu *parent)
229{
230	struct menu *menu, *last_menu;
231	struct symbol *sym;
232	struct property *prop;
233	struct expr *parentdep, *basedep, *dep, *dep2, **ep;
234
235	sym = parent->sym;
236	if (parent->list) {
237		if (sym && sym_is_choice(sym)) {
238			/* find the first choice value and find out choice type */
239			for (menu = parent->list; menu; menu = menu->next) {
240				if (menu->sym) {
241					current_entry = parent;
242					menu_set_type(menu->sym->type);
243					current_entry = menu;
244					menu_set_type(sym->type);
245					break;
246				}
247			}
248			parentdep = expr_alloc_symbol(sym);
249		} else if (parent->prompt)
250			parentdep = parent->prompt->visible.expr;
251		else
252			parentdep = parent->dep;
253
254		for (menu = parent->list; menu; menu = menu->next) {
255			basedep = expr_transform(menu->dep);
256			basedep = expr_alloc_and(expr_copy(parentdep), basedep);
257			basedep = expr_eliminate_dups(basedep);
258			menu->dep = basedep;
259			if (menu->sym)
260				prop = menu->sym->prop;
261			else
262				prop = menu->prompt;
263			for (; prop; prop = prop->next) {
264				if (prop->menu != menu)
265					continue;
266				dep = expr_transform(prop->visible.expr);
267				dep = expr_alloc_and(expr_copy(basedep), dep);
268				dep = expr_eliminate_dups(dep);
269				if (menu->sym && menu->sym->type != S_TRISTATE)
270					dep = expr_trans_bool(dep);
271				prop->visible.expr = dep;
272				if (prop->type == P_SELECT) {
273					struct symbol *es = prop_get_symbol(prop);
274					es->rev_dep.expr = expr_alloc_or(es->rev_dep.expr,
275							expr_alloc_and(expr_alloc_symbol(menu->sym), expr_copy(dep)));
276				}
277			}
278		}
279		for (menu = parent->list; menu; menu = menu->next)
280			menu_finalize(menu);
281	} else if (sym) {
282		basedep = parent->prompt ? parent->prompt->visible.expr : NULL;
283		basedep = expr_trans_compare(basedep, E_UNEQUAL, &symbol_no);
284		basedep = expr_eliminate_dups(expr_transform(basedep));
285		last_menu = NULL;
286		for (menu = parent->next; menu; menu = menu->next) {
287			dep = menu->prompt ? menu->prompt->visible.expr : menu->dep;
288			if (!expr_contains_symbol(dep, sym))
289				break;
290			if (expr_depends_symbol(dep, sym))
291				goto next;
292			dep = expr_trans_compare(dep, E_UNEQUAL, &symbol_no);
293			dep = expr_eliminate_dups(expr_transform(dep));
294			dep2 = expr_copy(basedep);
295			expr_eliminate_eq(&dep, &dep2);
296			expr_free(dep);
297			if (!expr_is_yes(dep2)) {
298				expr_free(dep2);
299				break;
300			}
301			expr_free(dep2);
302		next:
303			menu_finalize(menu);
304			menu->parent = parent;
305			last_menu = menu;
306		}
307		if (last_menu) {
308			parent->list = parent->next;
309			parent->next = last_menu->next;
310			last_menu->next = NULL;
311		}
312	}
313	for (menu = parent->list; menu; menu = menu->next) {
314		if (sym && sym_is_choice(sym) && menu->sym) {
315			menu->sym->flags |= SYMBOL_CHOICEVAL;
316			if (!menu->prompt)
317				menu_warn(menu, "choice value must have a prompt");
318			for (prop = menu->sym->prop; prop; prop = prop->next) {
319				if (prop->type == P_PROMPT && prop->menu != menu) {
320					prop_warn(prop, "choice values "
321					    "currently only support a "
322					    "single prompt");
323				}
324				if (prop->type == P_DEFAULT)
325					prop_warn(prop, "defaults for choice "
326					    "values not supported");
327			}
328			current_entry = menu;
329			menu_set_type(sym->type);
330			menu_add_symbol(P_CHOICE, sym, NULL);
331			prop = sym_get_choice_prop(sym);
332			for (ep = &prop->expr; *ep; ep = &(*ep)->left.expr)
333				;
334			*ep = expr_alloc_one(E_CHOICE, NULL);
335			(*ep)->right.sym = menu->sym;
336		}
337		if (menu->list && (!menu->prompt || !menu->prompt->text)) {
338			for (last_menu = menu->list; ; last_menu = last_menu->next) {
339				last_menu->parent = parent;
340				if (!last_menu->next)
341					break;
342			}
343			last_menu->next = menu->next;
344			menu->next = menu->list;
345			menu->list = NULL;
346		}
347	}
348
349	if (sym && !(sym->flags & SYMBOL_WARNED)) {
350		if (sym->type == S_UNKNOWN)
351			menu_warn(parent, "config symbol defined without type");
352
353		if (sym_is_choice(sym) && !parent->prompt)
354			menu_warn(parent, "choice must have a prompt");
355
356		/* Check properties connected to this symbol */
357		sym_check_prop(sym);
358		sym->flags |= SYMBOL_WARNED;
359	}
360
361	if (sym && !sym_is_optional(sym) && parent->prompt) {
362		sym->rev_dep.expr = expr_alloc_or(sym->rev_dep.expr,
363				expr_alloc_and(parent->prompt->visible.expr,
364					expr_alloc_symbol(&symbol_mod)));
365	}
366}
367
368bool menu_is_visible(struct menu *menu)
369{
370	struct menu *child;
371	struct symbol *sym;
372	tristate visible;
373
374	if (!menu->prompt)
375		return false;
376	sym = menu->sym;
377	if (sym) {
378		sym_calc_value(sym);
379		visible = menu->prompt->visible.tri;
380	} else
381		visible = menu->prompt->visible.tri = expr_calc_value(menu->prompt->visible.expr);
382
383	if (visible != no)
384		return true;
385	if (!sym || sym_get_tristate_value(menu->sym) == no)
386		return false;
387
388	for (child = menu->list; child; child = child->next)
389		if (menu_is_visible(child))
390			return true;
391	return false;
392}
393
394const char *menu_get_prompt(struct menu *menu)
395{
396	if (menu->prompt)
397		return _(menu->prompt->text);
398	else if (menu->sym)
399		return _(menu->sym->name);
400	return NULL;
401}
402
403struct menu *menu_get_root_menu(struct menu *menu)
404{
405	return &rootmenu;
406}
407
408struct menu *menu_get_parent_menu(struct menu *menu)
409{
410	enum prop_type type;
411
412	for (; menu != &rootmenu; menu = menu->parent) {
413		type = menu->prompt ? menu->prompt->type : 0;
414		if (type == P_MENU)
415			break;
416	}
417	return menu;
418}
419