yann@1: /*
yann@1:  * Copyright (C) 2002 Roman Zippel <zippel@linux-m68k.org>
yann@1:  * Released under the terms of the GNU GPL v2.0.
yann@1:  */
yann@1: 
yann@1: #include <ctype.h>
yann@1: #include <stdlib.h>
yann@1: #include <string.h>
yann@1: #include <regex.h>
yann@1: #include <sys/utsname.h>
yann@1: 
yann@1: #define LKC_DIRECT_LINK
yann@1: #include "lkc.h"
yann@1: 
yann@1: struct symbol symbol_yes = {
yann@1: 	.name = "y",
yann@1: 	.curr = { "y", yes },
yann@1: 	.flags = SYMBOL_CONST|SYMBOL_VALID,
yann@1: }, symbol_mod = {
yann@1: 	.name = "m",
yann@1: 	.curr = { "m", mod },
yann@1: 	.flags = SYMBOL_CONST|SYMBOL_VALID,
yann@1: }, symbol_no = {
yann@1: 	.name = "n",
yann@1: 	.curr = { "n", no },
yann@1: 	.flags = SYMBOL_CONST|SYMBOL_VALID,
yann@1: }, symbol_empty = {
yann@1: 	.name = "",
yann@1: 	.curr = { "", no },
yann@1: 	.flags = SYMBOL_VALID,
yann@1: };
yann@1: 
yann@1: struct symbol *sym_defconfig_list;
yann@1: struct symbol *modules_sym;
yann@1: tristate modules_val;
yann@1: 
yann@943: struct expr *sym_env_list;
yann@943: 
yann@1: void sym_add_default(struct symbol *sym, const char *def)
yann@1: {
yann@1: 	struct property *prop = prop_alloc(P_DEFAULT, sym);
yann@1: 
yann@943: 	prop->expr = expr_alloc_symbol(sym_lookup(def, SYMBOL_CONST));
yann@1: }
yann@1: 
yann@1: void sym_init(void)
yann@1: {
yann@1: 	struct symbol *sym;
yann@1: 	struct utsname uts;
yann@1: 	static bool inited = false;
yann@943: 	char* p;
yann@1: 
yann@1: 	if (inited)
yann@1: 		return;
yann@1: 	inited = true;
yann@1: 
yann@1: 	uname(&uts);
yann@1: 
yann@943: 	sym = sym_lookup("UNAME_RELEASE", 0);
yann@1: 	sym->type = S_STRING;
yann@1: 	sym->flags |= SYMBOL_AUTO;
yann@943: 	sym_add_default(sym, uts.release);
yann@1: 
yann@1: 	sym = sym_lookup("PROJECTVERSION", 0);
yann@1: 	sym->type = S_STRING;
yann@1: 	sym->flags |= SYMBOL_AUTO;
yann@1: 	p = getenv("PROJECTVERSION");
yann@1: 	if (p)
yann@1: 		sym_add_default(sym, p);
yann@1: }
yann@1: 
yann@1: enum symbol_type sym_get_type(struct symbol *sym)
yann@1: {
yann@1: 	enum symbol_type type = sym->type;
yann@1: 
yann@1: 	if (type == S_TRISTATE) {
yann@1: 		if (sym_is_choice_value(sym) && sym->visible == yes)
yann@1: 			type = S_BOOLEAN;
yann@1: 		else if (modules_val == no)
yann@1: 			type = S_BOOLEAN;
yann@1: 	}
yann@1: 	return type;
yann@1: }
yann@1: 
yann@1: const char *sym_type_name(enum symbol_type type)
yann@1: {
yann@1: 	switch (type) {
yann@1: 	case S_BOOLEAN:
yann@1: 		return "boolean";
yann@1: 	case S_TRISTATE:
yann@1: 		return "tristate";
yann@1: 	case S_INT:
yann@1: 		return "integer";
yann@1: 	case S_HEX:
yann@1: 		return "hex";
yann@1: 	case S_STRING:
yann@1: 		return "string";
yann@1: 	case S_UNKNOWN:
yann@1: 		return "unknown";
yann@1: 	case S_OTHER:
yann@1: 		break;
yann@1: 	}
yann@1: 	return "???";
yann@1: }
yann@1: 
yann@1: struct property *sym_get_choice_prop(struct symbol *sym)
yann@1: {
yann@1: 	struct property *prop;
yann@1: 
yann@1: 	for_all_choices(sym, prop)
yann@1: 		return prop;
yann@1: 	return NULL;
yann@1: }
yann@1: 
yann@943: struct property *sym_get_env_prop(struct symbol *sym)
yann@943: {
yann@943: 	struct property *prop;
yann@943: 
yann@943: 	for_all_properties(sym, prop, P_ENV)
yann@943: 		return prop;
yann@943: 	return NULL;
yann@943: }
yann@943: 
yann@1: struct property *sym_get_default_prop(struct symbol *sym)
yann@1: {
yann@1: 	struct property *prop;
yann@1: 
yann@1: 	for_all_defaults(sym, prop) {
yann@1: 		prop->visible.tri = expr_calc_value(prop->visible.expr);
yann@1: 		if (prop->visible.tri != no)
yann@1: 			return prop;
yann@1: 	}
yann@1: 	return NULL;
yann@1: }
yann@1: 
yann@1: struct property *sym_get_range_prop(struct symbol *sym)
yann@1: {
yann@1: 	struct property *prop;
yann@1: 
yann@1: 	for_all_properties(sym, prop, P_RANGE) {
yann@1: 		prop->visible.tri = expr_calc_value(prop->visible.expr);
yann@1: 		if (prop->visible.tri != no)
yann@1: 			return prop;
yann@1: 	}
yann@1: 	return NULL;
yann@1: }
yann@1: 
yann@1: static int sym_get_range_val(struct symbol *sym, int base)
yann@1: {
yann@1: 	sym_calc_value(sym);
yann@1: 	switch (sym->type) {
yann@1: 	case S_INT:
yann@1: 		base = 10;
yann@1: 		break;
yann@1: 	case S_HEX:
yann@1: 		base = 16;
yann@1: 		break;
yann@1: 	default:
yann@1: 		break;
yann@1: 	}
yann@1: 	return strtol(sym->curr.val, NULL, base);
yann@1: }
yann@1: 
yann@1: static void sym_validate_range(struct symbol *sym)
yann@1: {
yann@1: 	struct property *prop;
yann@1: 	int base, val, val2;
yann@1: 	char str[64];
yann@1: 
yann@1: 	switch (sym->type) {
yann@1: 	case S_INT:
yann@1: 		base = 10;
yann@1: 		break;
yann@1: 	case S_HEX:
yann@1: 		base = 16;
yann@1: 		break;
yann@1: 	default:
yann@1: 		return;
yann@1: 	}
yann@1: 	prop = sym_get_range_prop(sym);
yann@1: 	if (!prop)
yann@1: 		return;
yann@1: 	val = strtol(sym->curr.val, NULL, base);
yann@1: 	val2 = sym_get_range_val(prop->expr->left.sym, base);
yann@1: 	if (val >= val2) {
yann@1: 		val2 = sym_get_range_val(prop->expr->right.sym, base);
yann@1: 		if (val <= val2)
yann@1: 			return;
yann@1: 	}
yann@1: 	if (sym->type == S_INT)
yann@1: 		sprintf(str, "%d", val2);
yann@1: 	else
yann@1: 		sprintf(str, "0x%x", val2);
yann@1: 	sym->curr.val = strdup(str);
yann@1: }
yann@1: 
yann@1: static void sym_calc_visibility(struct symbol *sym)
yann@1: {
yann@1: 	struct property *prop;
yann@1: 	tristate tri;
yann@1: 
yann@1: 	/* any prompt visible? */
yann@1: 	tri = no;
yann@1: 	for_all_prompts(sym, prop) {
yann@1: 		prop->visible.tri = expr_calc_value(prop->visible.expr);
yann@943: 		tri = EXPR_OR(tri, prop->visible.tri);
yann@1: 	}
yann@1: 	if (tri == mod && (sym->type != S_TRISTATE || modules_val == no))
yann@1: 		tri = yes;
yann@1: 	if (sym->visible != tri) {
yann@1: 		sym->visible = tri;
yann@1: 		sym_set_changed(sym);
yann@1: 	}
yann@1: 	if (sym_is_choice_value(sym))
yann@1: 		return;
yann@1: 	tri = no;
yann@1: 	if (sym->rev_dep.expr)
yann@1: 		tri = expr_calc_value(sym->rev_dep.expr);
yann@1: 	if (tri == mod && sym_get_type(sym) == S_BOOLEAN)
yann@1: 		tri = yes;
yann@1: 	if (sym->rev_dep.tri != tri) {
yann@1: 		sym->rev_dep.tri = tri;
yann@1: 		sym_set_changed(sym);
yann@1: 	}
yann@1: }
yann@1: 
yann@1: static struct symbol *sym_calc_choice(struct symbol *sym)
yann@1: {
yann@1: 	struct symbol *def_sym;
yann@1: 	struct property *prop;
yann@1: 	struct expr *e;
yann@1: 
yann@1: 	/* is the user choice visible? */
yann@1: 	def_sym = sym->def[S_DEF_USER].val;
yann@1: 	if (def_sym) {
yann@1: 		sym_calc_visibility(def_sym);
yann@1: 		if (def_sym->visible != no)
yann@1: 			return def_sym;
yann@1: 	}
yann@1: 
yann@1: 	/* any of the defaults visible? */
yann@1: 	for_all_defaults(sym, prop) {
yann@1: 		prop->visible.tri = expr_calc_value(prop->visible.expr);
yann@1: 		if (prop->visible.tri == no)
yann@1: 			continue;
yann@1: 		def_sym = prop_get_symbol(prop);
yann@1: 		sym_calc_visibility(def_sym);
yann@1: 		if (def_sym->visible != no)
yann@1: 			return def_sym;
yann@1: 	}
yann@1: 
yann@1: 	/* just get the first visible value */
yann@1: 	prop = sym_get_choice_prop(sym);
yann@943: 	expr_list_for_each_sym(prop->expr, e, def_sym) {
yann@1: 		sym_calc_visibility(def_sym);
yann@1: 		if (def_sym->visible != no)
yann@1: 			return def_sym;
yann@1: 	}
yann@1: 
yann@1: 	/* no choice? reset tristate value */
yann@1: 	sym->curr.tri = no;
yann@1: 	return NULL;
yann@1: }
yann@1: 
yann@1: void sym_calc_value(struct symbol *sym)
yann@1: {
yann@1: 	struct symbol_value newval, oldval;
yann@1: 	struct property *prop;
yann@1: 	struct expr *e;
yann@1: 
yann@1: 	if (!sym)
yann@1: 		return;
yann@1: 
yann@1: 	if (sym->flags & SYMBOL_VALID)
yann@1: 		return;
yann@1: 	sym->flags |= SYMBOL_VALID;
yann@1: 
yann@1: 	oldval = sym->curr;
yann@1: 
yann@1: 	switch (sym->type) {
yann@1: 	case S_INT:
yann@1: 	case S_HEX:
yann@1: 	case S_STRING:
yann@1: 		newval = symbol_empty.curr;
yann@1: 		break;
yann@1: 	case S_BOOLEAN:
yann@1: 	case S_TRISTATE:
yann@1: 		newval = symbol_no.curr;
yann@1: 		break;
yann@1: 	default:
yann@1: 		sym->curr.val = sym->name;
yann@1: 		sym->curr.tri = no;
yann@1: 		return;
yann@1: 	}
yann@1: 	if (!sym_is_choice_value(sym))
yann@1: 		sym->flags &= ~SYMBOL_WRITE;
yann@1: 
yann@1: 	sym_calc_visibility(sym);
yann@1: 
yann@1: 	/* set default if recursively called */
yann@1: 	sym->curr = newval;
yann@1: 
yann@1: 	switch (sym_get_type(sym)) {
yann@1: 	case S_BOOLEAN:
yann@1: 	case S_TRISTATE:
yann@1: 		if (sym_is_choice_value(sym) && sym->visible == yes) {
yann@1: 			prop = sym_get_choice_prop(sym);
yann@1: 			newval.tri = (prop_get_symbol(prop)->curr.val == sym) ? yes : no;
yann@943: 		} else {
yann@943: 			if (sym->visible != no) {
yann@943: 				/* if the symbol is visible use the user value
yann@943: 				 * if available, otherwise try the default value
yann@943: 				 */
yann@943: 				sym->flags |= SYMBOL_WRITE;
yann@943: 				if (sym_has_value(sym)) {
yann@943: 					newval.tri = EXPR_AND(sym->def[S_DEF_USER].tri,
yann@943: 							      sym->visible);
yann@943: 					goto calc_newval;
yann@943: 				}
yann@943: 			}
yann@943: 			if (sym->rev_dep.tri != no)
yann@943: 				sym->flags |= SYMBOL_WRITE;
yann@943: 			if (!sym_is_choice(sym)) {
yann@1: 				prop = sym_get_default_prop(sym);
yann@943: 				if (prop) {
yann@943: 					sym->flags |= SYMBOL_WRITE;
yann@943: 					newval.tri = EXPR_AND(expr_calc_value(prop->expr),
yann@943: 							      prop->visible.tri);
yann@943: 				}
yann@1: 			}
yann@943: 		calc_newval:
yann@943: 			newval.tri = EXPR_OR(newval.tri, sym->rev_dep.tri);
yann@1: 		}
yann@1: 		if (newval.tri == mod && sym_get_type(sym) == S_BOOLEAN)
yann@1: 			newval.tri = yes;
yann@1: 		break;
yann@1: 	case S_STRING:
yann@1: 	case S_HEX:
yann@1: 	case S_INT:
yann@1: 		if (sym->visible != no) {
yann@1: 			sym->flags |= SYMBOL_WRITE;
yann@1: 			if (sym_has_value(sym)) {
yann@1: 				newval.val = sym->def[S_DEF_USER].val;
yann@1: 				break;
yann@1: 			}
yann@1: 		}
yann@1: 		prop = sym_get_default_prop(sym);
yann@1: 		if (prop) {
yann@1: 			struct symbol *ds = prop_get_symbol(prop);
yann@1: 			if (ds) {
yann@1: 				sym->flags |= SYMBOL_WRITE;
yann@1: 				sym_calc_value(ds);
yann@1: 				newval.val = ds->curr.val;
yann@1: 			}
yann@1: 		}
yann@1: 		break;
yann@1: 	default:
yann@1: 		;
yann@1: 	}
yann@1: 
yann@1: 	sym->curr = newval;
yann@1: 	if (sym_is_choice(sym) && newval.tri == yes)
yann@1: 		sym->curr.val = sym_calc_choice(sym);
yann@1: 	sym_validate_range(sym);
yann@1: 
yann@1: 	if (memcmp(&oldval, &sym->curr, sizeof(oldval))) {
yann@1: 		sym_set_changed(sym);
yann@1: 		if (modules_sym == sym) {
yann@1: 			sym_set_all_changed();
yann@1: 			modules_val = modules_sym->curr.tri;
yann@1: 		}
yann@1: 	}
yann@1: 
yann@1: 	if (sym_is_choice(sym)) {
yann@943: 		struct symbol *choice_sym;
yann@1: 		int flags = sym->flags & (SYMBOL_CHANGED | SYMBOL_WRITE);
yann@943: 
yann@1: 		prop = sym_get_choice_prop(sym);
yann@943: 		expr_list_for_each_sym(prop->expr, e, choice_sym) {
yann@943: 			choice_sym->flags |= flags;
yann@1: 			if (flags & SYMBOL_CHANGED)
yann@943: 				sym_set_changed(choice_sym);
yann@1: 		}
yann@1: 	}
yann@943: 
yann@943: 	if (sym->flags & SYMBOL_AUTO)
yann@943: 		sym->flags &= ~SYMBOL_WRITE;
yann@1: }
yann@1: 
yann@1: void sym_clear_all_valid(void)
yann@1: {
yann@1: 	struct symbol *sym;
yann@1: 	int i;
yann@1: 
yann@1: 	for_all_symbols(i, sym)
yann@1: 		sym->flags &= ~SYMBOL_VALID;
yann@39: 	sym_add_change_count(1);
yann@1: 	if (modules_sym)
yann@1: 		sym_calc_value(modules_sym);
yann@1: }
yann@1: 
yann@1: void sym_set_changed(struct symbol *sym)
yann@1: {
yann@1: 	struct property *prop;
yann@1: 
yann@1: 	sym->flags |= SYMBOL_CHANGED;
yann@1: 	for (prop = sym->prop; prop; prop = prop->next) {
yann@1: 		if (prop->menu)
yann@1: 			prop->menu->flags |= MENU_CHANGED;
yann@1: 	}
yann@1: }
yann@1: 
yann@1: void sym_set_all_changed(void)
yann@1: {
yann@1: 	struct symbol *sym;
yann@1: 	int i;
yann@1: 
yann@1: 	for_all_symbols(i, sym)
yann@1: 		sym_set_changed(sym);
yann@1: }
yann@1: 
yann@1: bool sym_tristate_within_range(struct symbol *sym, tristate val)
yann@1: {
yann@1: 	int type = sym_get_type(sym);
yann@1: 
yann@1: 	if (sym->visible == no)
yann@1: 		return false;
yann@1: 
yann@1: 	if (type != S_BOOLEAN && type != S_TRISTATE)
yann@1: 		return false;
yann@1: 
yann@1: 	if (type == S_BOOLEAN && val == mod)
yann@1: 		return false;
yann@1: 	if (sym->visible <= sym->rev_dep.tri)
yann@1: 		return false;
yann@1: 	if (sym_is_choice_value(sym) && sym->visible == yes)
yann@1: 		return val == yes;
yann@1: 	return val >= sym->rev_dep.tri && val <= sym->visible;
yann@1: }
yann@1: 
yann@1: bool sym_set_tristate_value(struct symbol *sym, tristate val)
yann@1: {
yann@1: 	tristate oldval = sym_get_tristate_value(sym);
yann@1: 
yann@1: 	if (oldval != val && !sym_tristate_within_range(sym, val))
yann@1: 		return false;
yann@1: 
yann@1: 	if (!(sym->flags & SYMBOL_DEF_USER)) {
yann@1: 		sym->flags |= SYMBOL_DEF_USER;
yann@1: 		sym_set_changed(sym);
yann@1: 	}
yann@1: 	/*
yann@1: 	 * setting a choice value also resets the new flag of the choice
yann@1: 	 * symbol and all other choice values.
yann@1: 	 */
yann@1: 	if (sym_is_choice_value(sym) && val == yes) {
yann@1: 		struct symbol *cs = prop_get_symbol(sym_get_choice_prop(sym));
yann@1: 		struct property *prop;
yann@1: 		struct expr *e;
yann@1: 
yann@1: 		cs->def[S_DEF_USER].val = sym;
yann@1: 		cs->flags |= SYMBOL_DEF_USER;
yann@1: 		prop = sym_get_choice_prop(cs);
yann@1: 		for (e = prop->expr; e; e = e->left.expr) {
yann@1: 			if (e->right.sym->visible != no)
yann@1: 				e->right.sym->flags |= SYMBOL_DEF_USER;
yann@1: 		}
yann@1: 	}
yann@1: 
yann@1: 	sym->def[S_DEF_USER].tri = val;
yann@1: 	if (oldval != val)
yann@1: 		sym_clear_all_valid();
yann@1: 
yann@1: 	return true;
yann@1: }
yann@1: 
yann@1: tristate sym_toggle_tristate_value(struct symbol *sym)
yann@1: {
yann@1: 	tristate oldval, newval;
yann@1: 
yann@1: 	oldval = newval = sym_get_tristate_value(sym);
yann@1: 	do {
yann@1: 		switch (newval) {
yann@1: 		case no:
yann@1: 			newval = mod;
yann@1: 			break;
yann@1: 		case mod:
yann@1: 			newval = yes;
yann@1: 			break;
yann@1: 		case yes:
yann@1: 			newval = no;
yann@1: 			break;
yann@1: 		}
yann@1: 		if (sym_set_tristate_value(sym, newval))
yann@1: 			break;
yann@1: 	} while (oldval != newval);
yann@1: 	return newval;
yann@1: }
yann@1: 
yann@1: bool sym_string_valid(struct symbol *sym, const char *str)
yann@1: {
yann@1: 	signed char ch;
yann@1: 
yann@1: 	switch (sym->type) {
yann@1: 	case S_STRING:
yann@1: 		return true;
yann@1: 	case S_INT:
yann@1: 		ch = *str++;
yann@1: 		if (ch == '-')
yann@1: 			ch = *str++;
yann@1: 		if (!isdigit(ch))
yann@1: 			return false;
yann@1: 		if (ch == '0' && *str != 0)
yann@1: 			return false;
yann@1: 		while ((ch = *str++)) {
yann@1: 			if (!isdigit(ch))
yann@1: 				return false;
yann@1: 		}
yann@1: 		return true;
yann@1: 	case S_HEX:
yann@1: 		if (str[0] == '0' && (str[1] == 'x' || str[1] == 'X'))
yann@1: 			str += 2;
yann@1: 		ch = *str++;
yann@1: 		do {
yann@1: 			if (!isxdigit(ch))
yann@1: 				return false;
yann@1: 		} while ((ch = *str++));
yann@1: 		return true;
yann@1: 	case S_BOOLEAN:
yann@1: 	case S_TRISTATE:
yann@1: 		switch (str[0]) {
yann@1: 		case 'y': case 'Y':
yann@1: 		case 'm': case 'M':
yann@1: 		case 'n': case 'N':
yann@1: 			return true;
yann@1: 		}
yann@1: 		return false;
yann@1: 	default:
yann@1: 		return false;
yann@1: 	}
yann@1: }
yann@1: 
yann@1: bool sym_string_within_range(struct symbol *sym, const char *str)
yann@1: {
yann@1: 	struct property *prop;
yann@1: 	int val;
yann@1: 
yann@1: 	switch (sym->type) {
yann@1: 	case S_STRING:
yann@1: 		return sym_string_valid(sym, str);
yann@1: 	case S_INT:
yann@1: 		if (!sym_string_valid(sym, str))
yann@1: 			return false;
yann@1: 		prop = sym_get_range_prop(sym);
yann@1: 		if (!prop)
yann@1: 			return true;
yann@1: 		val = strtol(str, NULL, 10);
yann@1: 		return val >= sym_get_range_val(prop->expr->left.sym, 10) &&
yann@1: 		       val <= sym_get_range_val(prop->expr->right.sym, 10);
yann@1: 	case S_HEX:
yann@1: 		if (!sym_string_valid(sym, str))
yann@1: 			return false;
yann@1: 		prop = sym_get_range_prop(sym);
yann@1: 		if (!prop)
yann@1: 			return true;
yann@1: 		val = strtol(str, NULL, 16);
yann@1: 		return val >= sym_get_range_val(prop->expr->left.sym, 16) &&
yann@1: 		       val <= sym_get_range_val(prop->expr->right.sym, 16);
yann@1: 	case S_BOOLEAN:
yann@1: 	case S_TRISTATE:
yann@1: 		switch (str[0]) {
yann@1: 		case 'y': case 'Y':
yann@1: 			return sym_tristate_within_range(sym, yes);
yann@1: 		case 'm': case 'M':
yann@1: 			return sym_tristate_within_range(sym, mod);
yann@1: 		case 'n': case 'N':
yann@1: 			return sym_tristate_within_range(sym, no);
yann@1: 		}
yann@1: 		return false;
yann@1: 	default:
yann@1: 		return false;
yann@1: 	}
yann@1: }
yann@1: 
yann@1: bool sym_set_string_value(struct symbol *sym, const char *newval)
yann@1: {
yann@1: 	const char *oldval;
yann@1: 	char *val;
yann@1: 	int size;
yann@1: 
yann@1: 	switch (sym->type) {
yann@1: 	case S_BOOLEAN:
yann@1: 	case S_TRISTATE:
yann@1: 		switch (newval[0]) {
yann@1: 		case 'y': case 'Y':
yann@1: 			return sym_set_tristate_value(sym, yes);
yann@1: 		case 'm': case 'M':
yann@1: 			return sym_set_tristate_value(sym, mod);
yann@1: 		case 'n': case 'N':
yann@1: 			return sym_set_tristate_value(sym, no);
yann@1: 		}
yann@1: 		return false;
yann@1: 	default:
yann@1: 		;
yann@1: 	}
yann@1: 
yann@1: 	if (!sym_string_within_range(sym, newval))
yann@1: 		return false;
yann@1: 
yann@1: 	if (!(sym->flags & SYMBOL_DEF_USER)) {
yann@1: 		sym->flags |= SYMBOL_DEF_USER;
yann@1: 		sym_set_changed(sym);
yann@1: 	}
yann@1: 
yann@1: 	oldval = sym->def[S_DEF_USER].val;
yann@1: 	size = strlen(newval) + 1;
yann@1: 	if (sym->type == S_HEX && (newval[0] != '0' || (newval[1] != 'x' && newval[1] != 'X'))) {
yann@1: 		size += 2;
yann@1: 		sym->def[S_DEF_USER].val = val = malloc(size);
yann@1: 		*val++ = '0';
yann@1: 		*val++ = 'x';
yann@1: 	} else if (!oldval || strcmp(oldval, newval))
yann@1: 		sym->def[S_DEF_USER].val = val = malloc(size);
yann@1: 	else
yann@1: 		return true;
yann@1: 
yann@1: 	strcpy(val, newval);
yann@1: 	free((void *)oldval);
yann@1: 	sym_clear_all_valid();
yann@1: 
yann@1: 	return true;
yann@1: }
yann@1: 
yann@1: const char *sym_get_string_value(struct symbol *sym)
yann@1: {
yann@1: 	tristate val;
yann@1: 
yann@1: 	switch (sym->type) {
yann@1: 	case S_BOOLEAN:
yann@1: 	case S_TRISTATE:
yann@1: 		val = sym_get_tristate_value(sym);
yann@1: 		switch (val) {
yann@1: 		case no:
yann@1: 			return "n";
yann@1: 		case mod:
yann@1: 			return "m";
yann@1: 		case yes:
yann@1: 			return "y";
yann@1: 		}
yann@1: 		break;
yann@1: 	default:
yann@1: 		;
yann@1: 	}
yann@1: 	return (const char *)sym->curr.val;
yann@1: }
yann@1: 
yann@1: bool sym_is_changable(struct symbol *sym)
yann@1: {
yann@1: 	return sym->visible > sym->rev_dep.tri;
yann@1: }
yann@1: 
yann@943: struct symbol *sym_lookup(const char *name, int flags)
yann@1: {
yann@1: 	struct symbol *symbol;
yann@1: 	const char *ptr;
yann@1: 	char *new_name;
yann@1: 	int hash = 0;
yann@1: 
yann@1: 	if (name) {
yann@1: 		if (name[0] && !name[1]) {
yann@1: 			switch (name[0]) {
yann@1: 			case 'y': return &symbol_yes;
yann@1: 			case 'm': return &symbol_mod;
yann@1: 			case 'n': return &symbol_no;
yann@1: 			}
yann@1: 		}
yann@1: 		for (ptr = name; *ptr; ptr++)
yann@1: 			hash += *ptr;
yann@1: 		hash &= 0xff;
yann@1: 
yann@1: 		for (symbol = symbol_hash[hash]; symbol; symbol = symbol->next) {
yann@943: 			if (!strcmp(symbol->name, name) &&
yann@943: 			    (flags ? symbol->flags & flags
yann@943: 				   : !(symbol->flags & (SYMBOL_CONST|SYMBOL_CHOICE))))
yann@943: 				return symbol;
yann@1: 		}
yann@1: 		new_name = strdup(name);
yann@1: 	} else {
yann@1: 		new_name = NULL;
yann@1: 		hash = 256;
yann@1: 	}
yann@1: 
yann@1: 	symbol = malloc(sizeof(*symbol));
yann@1: 	memset(symbol, 0, sizeof(*symbol));
yann@1: 	symbol->name = new_name;
yann@1: 	symbol->type = S_UNKNOWN;
yann@943: 	symbol->flags |= flags;
yann@1: 
yann@1: 	symbol->next = symbol_hash[hash];
yann@1: 	symbol_hash[hash] = symbol;
yann@1: 
yann@1: 	return symbol;
yann@1: }
yann@1: 
yann@1: struct symbol *sym_find(const char *name)
yann@1: {
yann@1: 	struct symbol *symbol = NULL;
yann@1: 	const char *ptr;
yann@1: 	int hash = 0;
yann@1: 
yann@1: 	if (!name)
yann@1: 		return NULL;
yann@1: 
yann@1: 	if (name[0] && !name[1]) {
yann@1: 		switch (name[0]) {
yann@1: 		case 'y': return &symbol_yes;
yann@1: 		case 'm': return &symbol_mod;
yann@1: 		case 'n': return &symbol_no;
yann@1: 		}
yann@1: 	}
yann@1: 	for (ptr = name; *ptr; ptr++)
yann@1: 		hash += *ptr;
yann@1: 	hash &= 0xff;
yann@1: 
yann@1: 	for (symbol = symbol_hash[hash]; symbol; symbol = symbol->next) {
yann@1: 		if (!strcmp(symbol->name, name) &&
yann@1: 		    !(symbol->flags & SYMBOL_CONST))
yann@1: 				break;
yann@1: 	}
yann@1: 
yann@1: 	return symbol;
yann@1: }
yann@1: 
yann@1: struct symbol **sym_re_search(const char *pattern)
yann@1: {
yann@1: 	struct symbol *sym, **sym_arr = NULL;
yann@1: 	int i, cnt, size;
yann@1: 	regex_t re;
yann@1: 
yann@1: 	cnt = size = 0;
yann@1: 	/* Skip if empty */
yann@1: 	if (strlen(pattern) == 0)
yann@1: 		return NULL;
yann@1: 	if (regcomp(&re, pattern, REG_EXTENDED|REG_NOSUB|REG_ICASE))
yann@1: 		return NULL;
yann@1: 
yann@1: 	for_all_symbols(i, sym) {
yann@1: 		if (sym->flags & SYMBOL_CONST || !sym->name)
yann@1: 			continue;
yann@1: 		if (regexec(&re, sym->name, 0, NULL, 0))
yann@1: 			continue;
yann@1: 		if (cnt + 1 >= size) {
yann@1: 			void *tmp = sym_arr;
yann@1: 			size += 16;
yann@1: 			sym_arr = realloc(sym_arr, size * sizeof(struct symbol *));
yann@1: 			if (!sym_arr) {
yann@1: 				free(tmp);
yann@1: 				return NULL;
yann@1: 			}
yann@1: 		}
yann@1: 		sym_arr[cnt++] = sym;
yann@1: 	}
yann@1: 	if (sym_arr)
yann@1: 		sym_arr[cnt] = NULL;
yann@1: 	regfree(&re);
yann@1: 
yann@1: 	return sym_arr;
yann@1: }
yann@1: 
yann@1: 
yann@1: static struct symbol *sym_check_expr_deps(struct expr *e)
yann@1: {
yann@1: 	struct symbol *sym;
yann@1: 
yann@1: 	if (!e)
yann@1: 		return NULL;
yann@1: 	switch (e->type) {
yann@1: 	case E_OR:
yann@1: 	case E_AND:
yann@1: 		sym = sym_check_expr_deps(e->left.expr);
yann@1: 		if (sym)
yann@1: 			return sym;
yann@1: 		return sym_check_expr_deps(e->right.expr);
yann@1: 	case E_NOT:
yann@1: 		return sym_check_expr_deps(e->left.expr);
yann@1: 	case E_EQUAL:
yann@1: 	case E_UNEQUAL:
yann@1: 		sym = sym_check_deps(e->left.sym);
yann@1: 		if (sym)
yann@1: 			return sym;
yann@1: 		return sym_check_deps(e->right.sym);
yann@1: 	case E_SYMBOL:
yann@1: 		return sym_check_deps(e->left.sym);
yann@1: 	default:
yann@1: 		break;
yann@1: 	}
yann@1: 	printf("Oops! How to check %d?\n", e->type);
yann@1: 	return NULL;
yann@1: }
yann@1: 
yann@943: /* return NULL when dependencies are OK */
yann@943: static struct symbol *sym_check_sym_deps(struct symbol *sym)
yann@943: {
yann@943: 	struct symbol *sym2;
yann@943: 	struct property *prop;
yann@943: 
yann@943: 	sym2 = sym_check_expr_deps(sym->rev_dep.expr);
yann@943: 	if (sym2)
yann@943: 		return sym2;
yann@943: 
yann@943: 	for (prop = sym->prop; prop; prop = prop->next) {
yann@943: 		if (prop->type == P_CHOICE || prop->type == P_SELECT)
yann@943: 			continue;
yann@943: 		sym2 = sym_check_expr_deps(prop->visible.expr);
yann@943: 		if (sym2)
yann@943: 			break;
yann@943: 		if (prop->type != P_DEFAULT || sym_is_choice(sym))
yann@943: 			continue;
yann@943: 		sym2 = sym_check_expr_deps(prop->expr);
yann@943: 		if (sym2)
yann@943: 			break;
yann@943: 	}
yann@943: 
yann@943: 	return sym2;
yann@943: }
yann@943: 
yann@943: static struct symbol *sym_check_choice_deps(struct symbol *choice)
yann@943: {
yann@943: 	struct symbol *sym, *sym2;
yann@943: 	struct property *prop;
yann@943: 	struct expr *e;
yann@943: 
yann@943: 	prop = sym_get_choice_prop(choice);
yann@943: 	expr_list_for_each_sym(prop->expr, e, sym)
yann@943: 		sym->flags |= (SYMBOL_CHECK | SYMBOL_CHECKED);
yann@943: 
yann@943: 	choice->flags |= (SYMBOL_CHECK | SYMBOL_CHECKED);
yann@943: 	sym2 = sym_check_sym_deps(choice);
yann@943: 	choice->flags &= ~SYMBOL_CHECK;
yann@943: 	if (sym2)
yann@943: 		goto out;
yann@943: 
yann@943: 	expr_list_for_each_sym(prop->expr, e, sym) {
yann@943: 		sym2 = sym_check_sym_deps(sym);
yann@943: 		if (sym2) {
yann@943: 			fprintf(stderr, " -> %s", sym->name);
yann@943: 			break;
yann@943: 		}
yann@943: 	}
yann@943: out:
yann@943: 	expr_list_for_each_sym(prop->expr, e, sym)
yann@943: 		sym->flags &= ~SYMBOL_CHECK;
yann@943: 
yann@943: 	if (sym2 && sym_is_choice_value(sym2) &&
yann@943: 	    prop_get_symbol(sym_get_choice_prop(sym2)) == choice)
yann@943: 		sym2 = choice;
yann@943: 
yann@943: 	return sym2;
yann@943: }
yann@943: 
yann@1: struct symbol *sym_check_deps(struct symbol *sym)
yann@1: {
yann@1: 	struct symbol *sym2;
yann@1: 	struct property *prop;
yann@1: 
yann@1: 	if (sym->flags & SYMBOL_CHECK) {
yann@943: 		fprintf(stderr, "%s:%d:error: found recursive dependency: %s",
yann@943: 		        sym->prop->file->name, sym->prop->lineno,
yann@943: 			sym->name ? sym->name : "<choice>");
yann@1: 		return sym;
yann@1: 	}
yann@1: 	if (sym->flags & SYMBOL_CHECKED)
yann@1: 		return NULL;
yann@1: 
yann@943: 	if (sym_is_choice_value(sym)) {
yann@943: 		/* for choice groups start the check with main choice symbol */
yann@943: 		prop = sym_get_choice_prop(sym);
yann@943: 		sym2 = sym_check_deps(prop_get_symbol(prop));
yann@943: 	} else if (sym_is_choice(sym)) {
yann@943: 		sym2 = sym_check_choice_deps(sym);
yann@943: 	} else {
yann@943: 		sym->flags |= (SYMBOL_CHECK | SYMBOL_CHECKED);
yann@943: 		sym2 = sym_check_sym_deps(sym);
yann@943: 		sym->flags &= ~SYMBOL_CHECK;
yann@943: 	}
yann@1: 
yann@1: 	if (sym2) {
yann@943: 		fprintf(stderr, " -> %s", sym->name ? sym->name : "<choice>");
yann@1: 		if (sym2 == sym) {
yann@943: 			fprintf(stderr, "\n");
yann@943: 			zconfnerrs++;
yann@1: 			sym2 = NULL;
yann@1: 		}
yann@1: 	}
yann@943: 
yann@1: 	return sym2;
yann@1: }
yann@1: 
yann@1: struct property *prop_alloc(enum prop_type type, struct symbol *sym)
yann@1: {
yann@1: 	struct property *prop;
yann@1: 	struct property **propp;
yann@1: 
yann@1: 	prop = malloc(sizeof(*prop));
yann@1: 	memset(prop, 0, sizeof(*prop));
yann@1: 	prop->type = type;
yann@1: 	prop->sym = sym;
yann@1: 	prop->file = current_file;
yann@1: 	prop->lineno = zconf_lineno();
yann@1: 
yann@1: 	/* append property to the prop list of symbol */
yann@1: 	if (sym) {
yann@1: 		for (propp = &sym->prop; *propp; propp = &(*propp)->next)
yann@1: 			;
yann@1: 		*propp = prop;
yann@1: 	}
yann@1: 
yann@1: 	return prop;
yann@1: }
yann@1: 
yann@1: struct symbol *prop_get_symbol(struct property *prop)
yann@1: {
yann@1: 	if (prop->expr && (prop->expr->type == E_SYMBOL ||
yann@943: 			   prop->expr->type == E_LIST))
yann@1: 		return prop->expr->left.sym;
yann@1: 	return NULL;
yann@1: }
yann@1: 
yann@1: const char *prop_get_type_name(enum prop_type type)
yann@1: {
yann@1: 	switch (type) {
yann@1: 	case P_PROMPT:
yann@1: 		return "prompt";
yann@943: 	case P_ENV:
yann@943: 		return "env";
yann@1: 	case P_COMMENT:
yann@1: 		return "comment";
yann@1: 	case P_MENU:
yann@1: 		return "menu";
yann@1: 	case P_DEFAULT:
yann@1: 		return "default";
yann@1: 	case P_CHOICE:
yann@1: 		return "choice";
yann@1: 	case P_SELECT:
yann@1: 		return "select";
yann@1: 	case P_RANGE:
yann@1: 		return "range";
yann@1: 	case P_UNKNOWN:
yann@1: 		break;
yann@1: 	}
yann@1: 	return "unknown";
yann@1: }
yann@943: 
yann@943: void prop_add_env(const char *env)
yann@943: {
yann@943: 	struct symbol *sym, *sym2;
yann@943: 	struct property *prop;
yann@943: 	char *p;
yann@943: 
yann@943: 	sym = current_entry->sym;
yann@943: 	sym->flags |= SYMBOL_AUTO;
yann@943: 	for_all_properties(sym, prop, P_ENV) {
yann@943: 		sym2 = prop_get_symbol(prop);
yann@943: 		if (strcmp(sym2->name, env))
yann@943: 			menu_warn(current_entry, "redefining environment symbol from %s",
yann@943: 				  sym2->name);
yann@943: 		return;
yann@943: 	}
yann@943: 
yann@943: 	prop = prop_alloc(P_ENV, sym);
yann@943: 	prop->expr = expr_alloc_symbol(sym_lookup(env, SYMBOL_CONST));
yann@943: 
yann@943: 	sym_env_list = expr_alloc_one(E_LIST, sym_env_list);
yann@943: 	sym_env_list->right.sym = sym;
yann@943: 
yann@943: 	p = getenv(env);
yann@943: 	if (p)
yann@943: 		sym_add_default(sym, p);
yann@943: 	else
yann@943: 		menu_warn(current_entry, "environment variable %s undefined", env);
yann@943: }