[deliverable/linux.git] / scripts / kconfig / symbol.c

/*
 * Copyright (C) 2002 Roman Zippel <zippel@linux-m68k.org>
 * Released under the terms of the GNU GPL v2.0.
 */

#include <ctype.h>
#include <stdlib.h>
#include <string.h>
#include <regex.h>
#include <sys/utsname.h>

#define LKC_DIRECT_LINK
#include "lkc.h"

struct symbol symbol_yes = {
	.name = "y",
	.curr = { "y", yes },
	.flags = SYMBOL_CONST|SYMBOL_VALID,
}, symbol_mod = {
	.name = "m",
	.curr = { "m", mod },
	.flags = SYMBOL_CONST|SYMBOL_VALID,
}, symbol_no = {
	.name = "n",
	.curr = { "n", no },
	.flags = SYMBOL_CONST|SYMBOL_VALID,
}, symbol_empty = {
	.name = "",
	.curr = { "", no },
	.flags = SYMBOL_VALID,
};

struct symbol *sym_defconfig_list;
struct symbol *modules_sym;
tristate modules_val;

void sym_add_default(struct symbol *sym, const char *def)
{
	struct property *prop = prop_alloc(P_DEFAULT, sym);

	prop->expr = expr_alloc_symbol(sym_lookup(def, 1));
}

void sym_init(void)
{
	struct symbol *sym;
	struct utsname uts;
	char *p;
	static bool inited = false;

	if (inited)
		return;
	inited = true;

	uname(&uts);

	sym = sym_lookup("ARCH", 0);
	sym->type = S_STRING;
	sym->flags |= SYMBOL_AUTO;
	p = getenv("ARCH");
	if (p)
		sym_add_default(sym, p);

	sym = sym_lookup("KERNELVERSION", 0);
	sym->type = S_STRING;
	sym->flags |= SYMBOL_AUTO;
	p = getenv("KERNELVERSION");
	if (p)
		sym_add_default(sym, p);

	sym = sym_lookup("UNAME_RELEASE", 0);
	sym->type = S_STRING;
	sym->flags |= SYMBOL_AUTO;
	sym_add_default(sym, uts.release);
}

enum symbol_type sym_get_type(struct symbol *sym)
{
	enum symbol_type type = sym->type;

	if (type == S_TRISTATE) {
		if (sym_is_choice_value(sym) && sym->visible == yes)
			type = S_BOOLEAN;
		else if (modules_val == no)
			type = S_BOOLEAN;
	}
	return type;
}

const char *sym_type_name(enum symbol_type type)
{
	switch (type) {
	case S_BOOLEAN:
		return "boolean";
	case S_TRISTATE:
		return "tristate";
	case S_INT:
		return "integer";
	case S_HEX:
		return "hex";
	case S_STRING:
		return "string";
	case S_UNKNOWN:
		return "unknown";
	case S_OTHER:
		break;
	}
	return "???";
}

struct property *sym_get_choice_prop(struct symbol *sym)
{
	struct property *prop;

	for_all_choices(sym, prop)
		return prop;
	return NULL;
}

struct property *sym_get_default_prop(struct symbol *sym)
{
	struct property *prop;

	for_all_defaults(sym, prop) {
		prop->visible.tri = expr_calc_value(prop->visible.expr);
		if (prop->visible.tri != no)
			return prop;
	}
	return NULL;
}

struct property *sym_get_range_prop(struct symbol *sym)
{
	struct property *prop;

	for_all_properties(sym, prop, P_RANGE) {
		prop->visible.tri = expr_calc_value(prop->visible.expr);
		if (prop->visible.tri != no)
			return prop;
	}
	return NULL;
}

static int sym_get_range_val(struct symbol *sym, int base)
{
	sym_calc_value(sym);
	switch (sym->type) {
	case S_INT:
		base = 10;
		break;
	case S_HEX:
		base = 16;
		break;
	default:
		break;
	}
	return strtol(sym->curr.val, NULL, base);
}

static void sym_validate_range(struct symbol *sym)
{
	struct property *prop;
	int base, val, val2;
	char str[64];

	switch (sym->type) {
	case S_INT:
		base = 10;
		break;
	case S_HEX:
		base = 16;
		break;
	default:
		return;
	}
	prop = sym_get_range_prop(sym);
	if (!prop)
		return;
	val = strtol(sym->curr.val, NULL, base);
	val2 = sym_get_range_val(prop->expr->left.sym, base);
	if (val >= val2) {
		val2 = sym_get_range_val(prop->expr->right.sym, base);
		if (val <= val2)
			return;
	}
	if (sym->type == S_INT)
		sprintf(str, "%d", val2);
	else
		sprintf(str, "0x%x", val2);
	sym->curr.val = strdup(str);
}

static void sym_calc_visibility(struct symbol *sym)
{
	struct property *prop;
	tristate tri;

	/* any prompt visible? */
	tri = no;
	for_all_prompts(sym, prop) {
		prop->visible.tri = expr_calc_value(prop->visible.expr);
		tri = EXPR_OR(tri, prop->visible.tri);
	}
	if (tri == mod && (sym->type != S_TRISTATE || modules_val == no))
		tri = yes;
	if (sym->visible != tri) {
		sym->visible = tri;
		sym_set_changed(sym);
	}
	if (sym_is_choice_value(sym))
		return;
	tri = no;
	if (sym->rev_dep.expr)
		tri = expr_calc_value(sym->rev_dep.expr);
	if (tri == mod && sym_get_type(sym) == S_BOOLEAN)
		tri = yes;
	if (sym->rev_dep.tri != tri) {
		sym->rev_dep.tri = tri;
		sym_set_changed(sym);
	}
}

static struct symbol *sym_calc_choice(struct symbol *sym)
{
	struct symbol *def_sym;
	struct property *prop;
	struct expr *e;

	/* is the user choice visible? */
	def_sym = sym->def[S_DEF_USER].val;
	if (def_sym) {
		sym_calc_visibility(def_sym);
		if (def_sym->visible != no)
			return def_sym;
	}

	/* any of the defaults visible? */
	for_all_defaults(sym, prop) {
		prop->visible.tri = expr_calc_value(prop->visible.expr);
		if (prop->visible.tri == no)
			continue;
		def_sym = prop_get_symbol(prop);
		sym_calc_visibility(def_sym);
		if (def_sym->visible != no)
			return def_sym;
	}

	/* just get the first visible value */
	prop = sym_get_choice_prop(sym);
	expr_list_for_each_sym(prop->expr, e, def_sym) {
		sym_calc_visibility(def_sym);
		if (def_sym->visible != no)
			return def_sym;
	}

	/* no choice? reset tristate value */
	sym->curr.tri = no;
	return NULL;
}

void sym_calc_value(struct symbol *sym)
{
	struct symbol_value newval, oldval;
	struct property *prop;
	struct expr *e;

	if (!sym)
		return;

	if (sym->flags & SYMBOL_VALID)
		return;
	sym->flags |= SYMBOL_VALID;

	oldval = sym->curr;

	switch (sym->type) {
	case S_INT:
	case S_HEX:
	case S_STRING:
		newval = symbol_empty.curr;
		break;
	case S_BOOLEAN:
	case S_TRISTATE:
		newval = symbol_no.curr;
		break;
	default:
		sym->curr.val = sym->name;
		sym->curr.tri = no;
		return;
	}
	if (!sym_is_choice_value(sym))
		sym->flags &= ~SYMBOL_WRITE;

	sym_calc_visibility(sym);

	/* set default if recursively called */
	sym->curr = newval;

	switch (sym_get_type(sym)) {
	case S_BOOLEAN:
	case S_TRISTATE:
		if (sym_is_choice_value(sym) && sym->visible == yes) {
			prop = sym_get_choice_prop(sym);
			newval.tri = (prop_get_symbol(prop)->curr.val == sym) ? yes : no;
		} else if (EXPR_OR(sym->visible, sym->rev_dep.tri) != no) {
			sym->flags |= SYMBOL_WRITE;
			if (sym_has_value(sym))
				newval.tri = sym->def[S_DEF_USER].tri;
			else if (!sym_is_choice(sym)) {
				prop = sym_get_default_prop(sym);
				if (prop)
					newval.tri = expr_calc_value(prop->expr);
			}
			newval.tri = EXPR_OR(EXPR_AND(newval.tri, sym->visible), sym->rev_dep.tri);
		} else if (!sym_is_choice(sym)) {
			prop = sym_get_default_prop(sym);
			if (prop) {
				sym->flags |= SYMBOL_WRITE;
				newval.tri = expr_calc_value(prop->expr);
			}
		}
		if (newval.tri == mod && sym_get_type(sym) == S_BOOLEAN)
			newval.tri = yes;
		break;
	case S_STRING:
	case S_HEX:
	case S_INT:
		if (sym->visible != no) {
			sym->flags |= SYMBOL_WRITE;
			if (sym_has_value(sym)) {
				newval.val = sym->def[S_DEF_USER].val;
				break;
			}
		}
		prop = sym_get_default_prop(sym);
		if (prop) {
			struct symbol *ds = prop_get_symbol(prop);
			if (ds) {
				sym->flags |= SYMBOL_WRITE;
				sym_calc_value(ds);
				newval.val = ds->curr.val;
			}
		}
		break;
	default:
		;
	}

	sym->curr = newval;
	if (sym_is_choice(sym) && newval.tri == yes)
		sym->curr.val = sym_calc_choice(sym);
	sym_validate_range(sym);

	if (memcmp(&oldval, &sym->curr, sizeof(oldval))) {
		sym_set_changed(sym);
		if (modules_sym == sym) {
			sym_set_all_changed();
			modules_val = modules_sym->curr.tri;
		}
	}

	if (sym_is_choice(sym)) {
		struct symbol *choice_sym;
		int flags = sym->flags & (SYMBOL_CHANGED | SYMBOL_WRITE);

		prop = sym_get_choice_prop(sym);
		expr_list_for_each_sym(prop->expr, e, choice_sym) {
			choice_sym->flags |= flags;
			if (flags & SYMBOL_CHANGED)
				sym_set_changed(choice_sym);
		}
	}
}

void sym_clear_all_valid(void)
{
	struct symbol *sym;
	int i;

	for_all_symbols(i, sym)
		sym->flags &= ~SYMBOL_VALID;
	sym_add_change_count(1);
	if (modules_sym)
		sym_calc_value(modules_sym);
}

void sym_set_changed(struct symbol *sym)
{
	struct property *prop;

	sym->flags |= SYMBOL_CHANGED;
	for (prop = sym->prop; prop; prop = prop->next) {
		if (prop->menu)
			prop->menu->flags |= MENU_CHANGED;
	}
}

void sym_set_all_changed(void)
{
	struct symbol *sym;
	int i;

	for_all_symbols(i, sym)
		sym_set_changed(sym);
}

bool sym_tristate_within_range(struct symbol *sym, tristate val)
{
	int type = sym_get_type(sym);

	if (sym->visible == no)
		return false;

	if (type != S_BOOLEAN && type != S_TRISTATE)
		return false;

	if (type == S_BOOLEAN && val == mod)
		return false;
	if (sym->visible <= sym->rev_dep.tri)
		return false;
	if (sym_is_choice_value(sym) && sym->visible == yes)
		return val == yes;
	return val >= sym->rev_dep.tri && val <= sym->visible;
}

bool sym_set_tristate_value(struct symbol *sym, tristate val)
{
	tristate oldval = sym_get_tristate_value(sym);

	if (oldval != val && !sym_tristate_within_range(sym, val))
		return false;

	if (!(sym->flags & SYMBOL_DEF_USER)) {
		sym->flags |= SYMBOL_DEF_USER;
		sym_set_changed(sym);
	}
	/*
	 * setting a choice value also resets the new flag of the choice
	 * symbol and all other choice values.
	 */
	if (sym_is_choice_value(sym) && val == yes) {
		struct symbol *cs = prop_get_symbol(sym_get_choice_prop(sym));
		struct property *prop;
		struct expr *e;

		cs->def[S_DEF_USER].val = sym;
		cs->flags |= SYMBOL_DEF_USER;
		prop = sym_get_choice_prop(cs);
		for (e = prop->expr; e; e = e->left.expr) {
			if (e->right.sym->visible != no)
				e->right.sym->flags |= SYMBOL_DEF_USER;
		}
	}

	sym->def[S_DEF_USER].tri = val;
	if (oldval != val)
		sym_clear_all_valid();

	return true;
}

tristate sym_toggle_tristate_value(struct symbol *sym)
{
	tristate oldval, newval;

	oldval = newval = sym_get_tristate_value(sym);
	do {
		switch (newval) {
		case no:
			newval = mod;
			break;
		case mod:
			newval = yes;
			break;
		case yes:
			newval = no;
			break;
		}
		if (sym_set_tristate_value(sym, newval))
			break;
	} while (oldval != newval);
	return newval;
}

bool sym_string_valid(struct symbol *sym, const char *str)
{
	signed char ch;

	switch (sym->type) {
	case S_STRING:
		return true;
	case S_INT:
		ch = *str++;
		if (ch == '-')
			ch = *str++;
		if (!isdigit(ch))
			return false;
		if (ch == '0' && *str != 0)
			return false;
		while ((ch = *str++)) {
			if (!isdigit(ch))
				return false;
		}
		return true;
	case S_HEX:
		if (str[0] == '0' && (str[1] == 'x' || str[1] == 'X'))
			str += 2;
		ch = *str++;
		do {
			if (!isxdigit(ch))
				return false;
		} while ((ch = *str++));
		return true;
	case S_BOOLEAN:
	case S_TRISTATE:
		switch (str[0]) {
		case 'y': case 'Y':
		case 'm': case 'M':
		case 'n': case 'N':
			return true;
		}
		return false;
	default:
		return false;
	}
}

bool sym_string_within_range(struct symbol *sym, const char *str)
{
	struct property *prop;
	int val;

	switch (sym->type) {
	case S_STRING:
		return sym_string_valid(sym, str);
	case S_INT:
		if (!sym_string_valid(sym, str))
			return false;
		prop = sym_get_range_prop(sym);
		if (!prop)
			return true;
		val = strtol(str, NULL, 10);
		return val >= sym_get_range_val(prop->expr->left.sym, 10) &&
		       val <= sym_get_range_val(prop->expr->right.sym, 10);
	case S_HEX:
		if (!sym_string_valid(sym, str))
			return false;
		prop = sym_get_range_prop(sym);
		if (!prop)
			return true;
		val = strtol(str, NULL, 16);
		return val >= sym_get_range_val(prop->expr->left.sym, 16) &&
		       val <= sym_get_range_val(prop->expr->right.sym, 16);
	case S_BOOLEAN:
	case S_TRISTATE:
		switch (str[0]) {
		case 'y': case 'Y':
			return sym_tristate_within_range(sym, yes);
		case 'm': case 'M':
			return sym_tristate_within_range(sym, mod);
		case 'n': case 'N':
			return sym_tristate_within_range(sym, no);
		}
		return false;
	default:
		return false;
	}
}

bool sym_set_string_value(struct symbol *sym, const char *newval)
{
	const char *oldval;
	char *val;
	int size;

	switch (sym->type) {
	case S_BOOLEAN:
	case S_TRISTATE:
		switch (newval[0]) {
		case 'y': case 'Y':
			return sym_set_tristate_value(sym, yes);
		case 'm': case 'M':
			return sym_set_tristate_value(sym, mod);
		case 'n': case 'N':
			return sym_set_tristate_value(sym, no);
		}
		return false;
	default:
		;
	}

	if (!sym_string_within_range(sym, newval))
		return false;

	if (!(sym->flags & SYMBOL_DEF_USER)) {
		sym->flags |= SYMBOL_DEF_USER;
		sym_set_changed(sym);
	}

	oldval = sym->def[S_DEF_USER].val;
	size = strlen(newval) + 1;
	if (sym->type == S_HEX && (newval[0] != '0' || (newval[1] != 'x' && newval[1] != 'X'))) {
		size += 2;
		sym->def[S_DEF_USER].val = val = malloc(size);
		*val++ = '0';
		*val++ = 'x';
	} else if (!oldval || strcmp(oldval, newval))
		sym->def[S_DEF_USER].val = val = malloc(size);
	else
		return true;

	strcpy(val, newval);
	free((void *)oldval);
	sym_clear_all_valid();

	return true;
}

const char *sym_get_string_value(struct symbol *sym)
{
	tristate val;

	switch (sym->type) {
	case S_BOOLEAN:
	case S_TRISTATE:
		val = sym_get_tristate_value(sym);
		switch (val) {
		case no:
			return "n";
		case mod:
			return "m";
		case yes:
			return "y";
		}
		break;
	default:
		;
	}
	return (const char *)sym->curr.val;
}

bool sym_is_changable(struct symbol *sym)
{
	return sym->visible > sym->rev_dep.tri;
}

struct symbol *sym_lookup(const char *name, int isconst)
{
	struct symbol *symbol;
	const char *ptr;
	char *new_name;
	int hash = 0;

	if (name) {
		if (name[0] && !name[1]) {
			switch (name[0]) {
			case 'y': return &symbol_yes;
			case 'm': return &symbol_mod;
			case 'n': return &symbol_no;
			}
		}
		for (ptr = name; *ptr; ptr++)
			hash += *ptr;
		hash &= 0xff;

		for (symbol = symbol_hash[hash]; symbol; symbol = symbol->next) {
			if (!strcmp(symbol->name, name)) {
				if ((isconst && symbol->flags & SYMBOL_CONST) ||
				    (!isconst && !(symbol->flags & SYMBOL_CONST)))
					return symbol;
			}
		}
		new_name = strdup(name);
	} else {
		new_name = NULL;
		hash = 256;
	}

	symbol = malloc(sizeof(*symbol));
	memset(symbol, 0, sizeof(*symbol));
	symbol->name = new_name;
	symbol->type = S_UNKNOWN;
	if (isconst)
		symbol->flags |= SYMBOL_CONST;

	symbol->next = symbol_hash[hash];
	symbol_hash[hash] = symbol;

	return symbol;
}

struct symbol *sym_find(const char *name)
{
	struct symbol *symbol = NULL;
	const char *ptr;
	int hash = 0;

	if (!name)
		return NULL;

	if (name[0] && !name[1]) {
		switch (name[0]) {
		case 'y': return &symbol_yes;
		case 'm': return &symbol_mod;
		case 'n': return &symbol_no;
		}
	}
	for (ptr = name; *ptr; ptr++)
		hash += *ptr;
	hash &= 0xff;

	for (symbol = symbol_hash[hash]; symbol; symbol = symbol->next) {
		if (!strcmp(symbol->name, name) &&
		    !(symbol->flags & SYMBOL_CONST))
				break;
	}

	return symbol;
}

struct symbol **sym_re_search(const char *pattern)
{
	struct symbol *sym, **sym_arr = NULL;
	int i, cnt, size;
	regex_t re;

	cnt = size = 0;
	/* Skip if empty */
	if (strlen(pattern) == 0)
		return NULL;
	if (regcomp(&re, pattern, REG_EXTENDED|REG_NOSUB|REG_ICASE))
		return NULL;

	for_all_symbols(i, sym) {
		if (sym->flags & SYMBOL_CONST || !sym->name)
			continue;
		if (regexec(&re, sym->name, 0, NULL, 0))
			continue;
		if (cnt + 1 >= size) {
			void *tmp = sym_arr;
			size += 16;
			sym_arr = realloc(sym_arr, size * sizeof(struct symbol *));
			if (!sym_arr) {
				free(tmp);
				return NULL;
			}
		}
		sym_arr[cnt++] = sym;
	}
	if (sym_arr)
		sym_arr[cnt] = NULL;
	regfree(&re);

	return sym_arr;
}


struct symbol *sym_check_deps(struct symbol *sym);

static struct symbol *sym_check_expr_deps(struct expr *e)
{
	struct symbol *sym;

	if (!e)
		return NULL;
	switch (e->type) {
	case E_OR:
	case E_AND:
		sym = sym_check_expr_deps(e->left.expr);
		if (sym)
			return sym;
		return sym_check_expr_deps(e->right.expr);
	case E_NOT:
		return sym_check_expr_deps(e->left.expr);
	case E_EQUAL:
	case E_UNEQUAL:
		sym = sym_check_deps(e->left.sym);
		if (sym)
			return sym;
		return sym_check_deps(e->right.sym);
	case E_SYMBOL:
		return sym_check_deps(e->left.sym);
	default:
		break;
	}
	printf("Oops! How to check %d?\n", e->type);
	return NULL;
}

/* return NULL when dependencies are OK */
struct symbol *sym_check_deps(struct symbol *sym)
{
	struct symbol *sym2;
	struct property *prop;

	if (sym->flags & SYMBOL_CHECK) {
		fprintf(stderr, "%s:%d:error: found recursive dependency: %s",
		        sym->prop->file->name, sym->prop->lineno, sym->name);
		return sym;
	}
	if (sym->flags & SYMBOL_CHECKED)
		return NULL;

	sym->flags |= (SYMBOL_CHECK | SYMBOL_CHECKED);
	sym2 = sym_check_expr_deps(sym->rev_dep.expr);
	if (sym2)
		goto out;

	for (prop = sym->prop; prop; prop = prop->next) {
		if (prop->type == P_CHOICE || prop->type == P_SELECT)
			continue;
		sym2 = sym_check_expr_deps(prop->visible.expr);
		if (sym2)
			goto out;
		if (prop->type != P_DEFAULT || sym_is_choice(sym))
			continue;
		sym2 = sym_check_expr_deps(prop->expr);
		if (sym2)
			goto out;
	}
out:
	if (sym2)
		fprintf(stderr, " -> %s%s", sym->name, sym2 == sym? "\n": "");
	sym->flags &= ~SYMBOL_CHECK;
	return sym2;
}

struct property *prop_alloc(enum prop_type type, struct symbol *sym)
{
	struct property *prop;
	struct property **propp;

	prop = malloc(sizeof(*prop));
	memset(prop, 0, sizeof(*prop));
	prop->type = type;
	prop->sym = sym;
	prop->file = current_file;
	prop->lineno = zconf_lineno();

	/* append property to the prop list of symbol */
	if (sym) {
		for (propp = &sym->prop; *propp; propp = &(*propp)->next)
			;
		*propp = prop;
	}

	return prop;
}

struct symbol *prop_get_symbol(struct property *prop)
{
	if (prop->expr && (prop->expr->type == E_SYMBOL ||
			   prop->expr->type == E_LIST))
		return prop->expr->left.sym;
	return NULL;
}

const char *prop_get_type_name(enum prop_type type)
{
	switch (type) {
	case P_PROMPT:
		return "prompt";
	case P_COMMENT:
		return "comment";
	case P_MENU:
		return "menu";
	case P_DEFAULT:
		return "default";
	case P_CHOICE:
		return "choice";
	case P_SELECT:
		return "select";
	case P_RANGE:
		return "range";
	case P_UNKNOWN:
		break;
	}
	return "unknown";
}
Commit	Line	Data
1da177e4 LT	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 <stdlib.h>
	8	#include <string.h>
	9	#include <regex.h>
	10	#include <sys/utsname.h>
	11
	12	#define LKC_DIRECT_LINK
	13	#include "lkc.h"
	14
	15	struct symbol symbol_yes = {
	16	.name = "y",
	17	.curr = { "y", yes },
c0e150ac	18	.flags = SYMBOL_CONST\|SYMBOL_VALID,
1da177e4 LT	19	}, symbol_mod = {
	20	.name = "m",
	21	.curr = { "m", mod },
c0e150ac	22	.flags = SYMBOL_CONST\|SYMBOL_VALID,
1da177e4 LT	23	}, symbol_no = {
	24	.name = "n",
	25	.curr = { "n", no },
c0e150ac	26	.flags = SYMBOL_CONST\|SYMBOL_VALID,
1da177e4 LT	27	}, symbol_empty = {
	28	.name = "",
	29	.curr = { "", no },
	30	.flags = SYMBOL_VALID,
	31	};
	32
face4374	33	struct symbol *sym_defconfig_list;
1da177e4 LT	34	struct symbol *modules_sym;
	35	tristate modules_val;
	36
	37	void sym_add_default(struct symbol sym, const char def)
	38	{
	39	struct property *prop = prop_alloc(P_DEFAULT, sym);
	40
	41	prop->expr = expr_alloc_symbol(sym_lookup(def, 1));
	42	}
	43
	44	void sym_init(void)
	45	{
	46	struct symbol *sym;
	47	struct utsname uts;
	48	char *p;
	49	static bool inited = false;
	50
	51	if (inited)
	52	return;
	53	inited = true;
	54
	55	uname(&uts);
	56
	57	sym = sym_lookup("ARCH", 0);
	58	sym->type = S_STRING;
	59	sym->flags \|= SYMBOL_AUTO;
	60	p = getenv("ARCH");
	61	if (p)
	62	sym_add_default(sym, p);
	63
2244cbd8	64	sym = sym_lookup("KERNELVERSION", 0);
1da177e4 LT	65	sym->type = S_STRING;
1da177e4 LT	66	sym->flags \|= SYMBOL_AUTO;
2244cbd8	67	p = getenv("KERNELVERSION");
1da177e4 LT	68	if (p)
	69	sym_add_default(sym, p);
	70
	71	sym = sym_lookup("UNAME_RELEASE", 0);
	72	sym->type = S_STRING;
	73	sym->flags \|= SYMBOL_AUTO;
	74	sym_add_default(sym, uts.release);
	75	}
	76
	77	enum symbol_type sym_get_type(struct symbol *sym)
	78	{
	79	enum symbol_type type = sym->type;
	80
	81	if (type == S_TRISTATE) {
	82	if (sym_is_choice_value(sym) && sym->visible == yes)
	83	type = S_BOOLEAN;
	84	else if (modules_val == no)
	85	type = S_BOOLEAN;
	86	}
	87	return type;
	88	}
	89
	90	const char *sym_type_name(enum symbol_type type)
	91	{
	92	switch (type) {
	93	case S_BOOLEAN:
	94	return "boolean";
	95	case S_TRISTATE:
	96	return "tristate";
	97	case S_INT:
	98	return "integer";
	99	case S_HEX:
	100	return "hex";
	101	case S_STRING:
	102	return "string";
	103	case S_UNKNOWN:
	104	return "unknown";
	105	case S_OTHER:
	106	break;
	107	}
	108	return "???";
	109	}
	110
	111	struct property sym_get_choice_prop(struct symbol sym)
	112	{
	113	struct property *prop;
	114
	115	for_all_choices(sym, prop)
	116	return prop;
	117	return NULL;
	118	}
	119
	120	struct property sym_get_default_prop(struct symbol sym)
	121	{
	122	struct property *prop;
	123
	124	for_all_defaults(sym, prop) {
	125	prop->visible.tri = expr_calc_value(prop->visible.expr);
	126	if (prop->visible.tri != no)
	127	return prop;
	128	}
	129	return NULL;
	130	}
	131
132	struct property sym_get_range_prop(struct symbol sym)
133	{
134	struct property *prop;
135
136	for_all_properties(sym, prop, P_RANGE) {
137	prop->visible.tri = expr_calc_value(prop->visible.expr);
138	if (prop->visible.tri != no)
139	return prop;
140	}
141	return NULL;
142	}
143
4cf3cbe2 RZ	144	static int sym_get_range_val(struct symbol *sym, int base)
	145	{
	146	sym_calc_value(sym);
	147	switch (sym->type) {
	148	case S_INT:
	149	base = 10;
	150	break;
	151	case S_HEX:
	152	base = 16;
	153	break;
	154	default:
	155	break;
	156	}
	157	return strtol(sym->curr.val, NULL, base);
	158	}
	159
	160	static void sym_validate_range(struct symbol *sym)
	161	{
	162	struct property *prop;
	163	int base, val, val2;
	164	char str[64];
	165
	166	switch (sym->type) {
	167	case S_INT:
	168	base = 10;
	169	break;
	170	case S_HEX:
	171	base = 16;
	172	break;
	173	default:
	174	return;
	175	}
	176	prop = sym_get_range_prop(sym);
	177	if (!prop)
	178	return;
	179	val = strtol(sym->curr.val, NULL, base);
	180	val2 = sym_get_range_val(prop->expr->left.sym, base);
	181	if (val >= val2) {
	182	val2 = sym_get_range_val(prop->expr->right.sym, base);
	183	if (val <= val2)
	184	return;
	185	}
	186	if (sym->type == S_INT)
	187	sprintf(str, "%d", val2);
	188	else
	189	sprintf(str, "0x%x", val2);
	190	sym->curr.val = strdup(str);
	191	}
	192
1da177e4 LT	193	static void sym_calc_visibility(struct symbol *sym)
	194	{
	195	struct property *prop;
	196	tristate tri;
	197
	198	/* any prompt visible? */
	199	tri = no;
	200	for_all_prompts(sym, prop) {
	201	prop->visible.tri = expr_calc_value(prop->visible.expr);
d6ee3576	202	tri = EXPR_OR(tri, prop->visible.tri);
1da177e4 LT	203	}
	204	if (tri == mod && (sym->type != S_TRISTATE \|\| modules_val == no))
	205	tri = yes;
	206	if (sym->visible != tri) {
	207	sym->visible = tri;
	208	sym_set_changed(sym);
	209	}
	210	if (sym_is_choice_value(sym))
	211	return;
	212	tri = no;
	213	if (sym->rev_dep.expr)
	214	tri = expr_calc_value(sym->rev_dep.expr);
	215	if (tri == mod && sym_get_type(sym) == S_BOOLEAN)
	216	tri = yes;
	217	if (sym->rev_dep.tri != tri) {
	218	sym->rev_dep.tri = tri;
	219	sym_set_changed(sym);
	220	}
	221	}
	222
	223	static struct symbol sym_calc_choice(struct symbol sym)
	224	{
	225	struct symbol *def_sym;
	226	struct property *prop;
	227	struct expr *e;
	228
	229	/* is the user choice visible? */
0c1822e6	230	def_sym = sym->def[S_DEF_USER].val;
1da177e4 LT	231	if (def_sym) {
	232	sym_calc_visibility(def_sym);
	233	if (def_sym->visible != no)
	234	return def_sym;
	235	}
	236
	237	/* any of the defaults visible? */
	238	for_all_defaults(sym, prop) {
	239	prop->visible.tri = expr_calc_value(prop->visible.expr);
	240	if (prop->visible.tri == no)
	241	continue;
	242	def_sym = prop_get_symbol(prop);
	243	sym_calc_visibility(def_sym);
	244	if (def_sym->visible != no)
	245	return def_sym;
	246	}
	247
	248	/* just get the first visible value */
	249	prop = sym_get_choice_prop(sym);
7a962923	250	expr_list_for_each_sym(prop->expr, e, def_sym) {
1da177e4 LT	251	sym_calc_visibility(def_sym);
	252	if (def_sym->visible != no)
	253	return def_sym;
	254	}
	255
	256	/* no choice? reset tristate value */
	257	sym->curr.tri = no;
	258	return NULL;
	259	}
	260
	261	void sym_calc_value(struct symbol *sym)
	262	{
	263	struct symbol_value newval, oldval;
	264	struct property *prop;
	265	struct expr *e;
	266
	267	if (!sym)
	268	return;
	269
	270	if (sym->flags & SYMBOL_VALID)
	271	return;
	272	sym->flags \|= SYMBOL_VALID;
	273
	274	oldval = sym->curr;
	275
	276	switch (sym->type) {
	277	case S_INT:
	278	case S_HEX:
	279	case S_STRING:
	280	newval = symbol_empty.curr;
	281	break;
	282	case S_BOOLEAN:
	283	case S_TRISTATE:
	284	newval = symbol_no.curr;
	285	break;
	286	default:
	287	sym->curr.val = sym->name;
	288	sym->curr.tri = no;
	289	return;
	290	}
	291	if (!sym_is_choice_value(sym))
	292	sym->flags &= ~SYMBOL_WRITE;
	293
	294	sym_calc_visibility(sym);
	295
	296	/* set default if recursively called */
	297	sym->curr = newval;
	298
	299	switch (sym_get_type(sym)) {
	300	case S_BOOLEAN:
	301	case S_TRISTATE:
	302	if (sym_is_choice_value(sym) && sym->visible == yes) {
	303	prop = sym_get_choice_prop(sym);
	304	newval.tri = (prop_get_symbol(prop)->curr.val == sym) ? yes : no;
d6ee3576	305	} else if (EXPR_OR(sym->visible, sym->rev_dep.tri) != no) {
1da177e4 LT	306	sym->flags \|= SYMBOL_WRITE;
1da177e4 LT	307	if (sym_has_value(sym))
0c1822e6	308	newval.tri = sym->def[S_DEF_USER].tri;
1da177e4 LT	309	else if (!sym_is_choice(sym)) {
	310	prop = sym_get_default_prop(sym);
	311	if (prop)
	312	newval.tri = expr_calc_value(prop->expr);
	313	}
d6ee3576	314	newval.tri = EXPR_OR(EXPR_AND(newval.tri, sym->visible), sym->rev_dep.tri);
1da177e4 LT	315	} else if (!sym_is_choice(sym)) {
	316	prop = sym_get_default_prop(sym);
	317	if (prop) {
	318	sym->flags \|= SYMBOL_WRITE;
	319	newval.tri = expr_calc_value(prop->expr);
	320	}
	321	}
	322	if (newval.tri == mod && sym_get_type(sym) == S_BOOLEAN)
	323	newval.tri = yes;
	324	break;
	325	case S_STRING:
	326	case S_HEX:
	327	case S_INT:
	328	if (sym->visible != no) {
	329	sym->flags \|= SYMBOL_WRITE;
	330	if (sym_has_value(sym)) {
0c1822e6	331	newval.val = sym->def[S_DEF_USER].val;
1da177e4 LT	332	break;
	333	}
	334	}
	335	prop = sym_get_default_prop(sym);
	336	if (prop) {
	337	struct symbol *ds = prop_get_symbol(prop);
	338	if (ds) {
	339	sym->flags \|= SYMBOL_WRITE;
	340	sym_calc_value(ds);
	341	newval.val = ds->curr.val;
	342	}
	343	}
	344	break;
	345	default:
	346	;
	347	}
	348
	349	sym->curr = newval;
	350	if (sym_is_choice(sym) && newval.tri == yes)
	351	sym->curr.val = sym_calc_choice(sym);
4cf3cbe2	352	sym_validate_range(sym);
1da177e4	353
face4374	354	if (memcmp(&oldval, &sym->curr, sizeof(oldval))) {
1da177e4	355	sym_set_changed(sym);
face4374 RZ	356	if (modules_sym == sym) {
	357	sym_set_all_changed();
	358	modules_val = modules_sym->curr.tri;
	359	}
	360	}
1da177e4 LT	361
1da177e4 LT	362	if (sym_is_choice(sym)) {
7a962923	363	struct symbol *choice_sym;
1da177e4	364	int flags = sym->flags & (SYMBOL_CHANGED \| SYMBOL_WRITE);
7a962923	365
1da177e4	366	prop = sym_get_choice_prop(sym);
7a962923 RZ	367	expr_list_for_each_sym(prop->expr, e, choice_sym) {
7a962923 RZ	368	choice_sym->flags \|= flags;
1da177e4	369	if (flags & SYMBOL_CHANGED)
7a962923	370	sym_set_changed(choice_sym);
1da177e4 LT	371	}
	372	}
	373	}
	374
	375	void sym_clear_all_valid(void)
	376	{
	377	struct symbol *sym;
	378	int i;
	379
	380	for_all_symbols(i, sym)
	381	sym->flags &= ~SYMBOL_VALID;
bfc10001	382	sym_add_change_count(1);
1da177e4 LT	383	if (modules_sym)
	384	sym_calc_value(modules_sym);
	385	}
	386
	387	void sym_set_changed(struct symbol *sym)
	388	{
	389	struct property *prop;
	390
	391	sym->flags \|= SYMBOL_CHANGED;
	392	for (prop = sym->prop; prop; prop = prop->next) {
	393	if (prop->menu)
	394	prop->menu->flags \|= MENU_CHANGED;
	395	}
	396	}
	397
	398	void sym_set_all_changed(void)
	399	{
	400	struct symbol *sym;
	401	int i;
	402
	403	for_all_symbols(i, sym)
	404	sym_set_changed(sym);
	405	}
	406
	407	bool sym_tristate_within_range(struct symbol *sym, tristate val)
	408	{
	409	int type = sym_get_type(sym);
	410
	411	if (sym->visible == no)
	412	return false;
	413
	414	if (type != S_BOOLEAN && type != S_TRISTATE)
	415	return false;
	416
	417	if (type == S_BOOLEAN && val == mod)
	418	return false;
	419	if (sym->visible <= sym->rev_dep.tri)
	420	return false;
	421	if (sym_is_choice_value(sym) && sym->visible == yes)
	422	return val == yes;
	423	return val >= sym->rev_dep.tri && val <= sym->visible;
	424	}
	425
	426	bool sym_set_tristate_value(struct symbol *sym, tristate val)
	427	{
	428	tristate oldval = sym_get_tristate_value(sym);
	429
	430	if (oldval != val && !sym_tristate_within_range(sym, val))
	431	return false;
	432
669bfad9 RZ	433	if (!(sym->flags & SYMBOL_DEF_USER)) {
669bfad9 RZ	434	sym->flags \|= SYMBOL_DEF_USER;
1da177e4 LT	435	sym_set_changed(sym);
1da177e4 LT	436	}
3f23ca2b RZ	437	/*
	438	* setting a choice value also resets the new flag of the choice
	439	* symbol and all other choice values.
	440	*/
1da177e4 LT	441	if (sym_is_choice_value(sym) && val == yes) {
1da177e4 LT	442	struct symbol *cs = prop_get_symbol(sym_get_choice_prop(sym));
3f23ca2b RZ	443	struct property *prop;
3f23ca2b RZ	444	struct expr *e;
1da177e4	445
0c1822e6	446	cs->def[S_DEF_USER].val = sym;
669bfad9	447	cs->flags \|= SYMBOL_DEF_USER;
3f23ca2b RZ	448	prop = sym_get_choice_prop(cs);
	449	for (e = prop->expr; e; e = e->left.expr) {
	450	if (e->right.sym->visible != no)
669bfad9	451	e->right.sym->flags \|= SYMBOL_DEF_USER;
3f23ca2b	452	}
1da177e4 LT	453	}
1da177e4 LT	454
0c1822e6	455	sym->def[S_DEF_USER].tri = val;
face4374	456	if (oldval != val)
1da177e4	457	sym_clear_all_valid();
1da177e4 LT	458
	459	return true;
	460	}
	461
	462	tristate sym_toggle_tristate_value(struct symbol *sym)
	463	{
	464	tristate oldval, newval;
	465
	466	oldval = newval = sym_get_tristate_value(sym);
	467	do {
	468	switch (newval) {
	469	case no:
	470	newval = mod;
	471	break;
	472	case mod:
	473	newval = yes;
	474	break;
	475	case yes:
	476	newval = no;
	477	break;
	478	}
	479	if (sym_set_tristate_value(sym, newval))
	480	break;
	481	} while (oldval != newval);
	482	return newval;
	483	}
	484
	485	bool sym_string_valid(struct symbol sym, const char str)
	486	{
	487	signed char ch;
	488
	489	switch (sym->type) {
	490	case S_STRING:
	491	return true;
	492	case S_INT:
	493	ch = *str++;
	494	if (ch == '-')
	495	ch = *str++;
	496	if (!isdigit(ch))
	497	return false;
	498	if (ch == '0' && *str != 0)
	499	return false;
	500	while ((ch = *str++)) {
	501	if (!isdigit(ch))
	502	return false;
	503	}
	504	return true;
	505	case S_HEX:
	506	if (str[0] == '0' && (str[1] == 'x' \|\| str[1] == 'X'))
	507	str += 2;
	508	ch = *str++;
	509	do {
	510	if (!isxdigit(ch))
	511	return false;
	512	} while ((ch = *str++));
	513	return true;
	514	case S_BOOLEAN:
	515	case S_TRISTATE:
	516	switch (str[0]) {
	517	case 'y': case 'Y':
	518	case 'm': case 'M':
	519	case 'n': case 'N':
	520	return true;
	521	}
522	return false;
523	default:
524	return false;
525	}
526	}
527
528	bool sym_string_within_range(struct symbol sym, const char str)
529	{
530	struct property *prop;
531	int val;
532
533	switch (sym->type) {
534	case S_STRING:
535	return sym_string_valid(sym, str);
536	case S_INT:
537	if (!sym_string_valid(sym, str))
538	return false;
539	prop = sym_get_range_prop(sym);
540	if (!prop)
541	return true;
542	val = strtol(str, NULL, 10);
4cf3cbe2 RZ	543	return val >= sym_get_range_val(prop->expr->left.sym, 10) &&
4cf3cbe2 RZ	544	val <= sym_get_range_val(prop->expr->right.sym, 10);
1da177e4 LT	545	case S_HEX:
	546	if (!sym_string_valid(sym, str))
	547	return false;
	548	prop = sym_get_range_prop(sym);
	549	if (!prop)
	550	return true;
	551	val = strtol(str, NULL, 16);
4cf3cbe2 RZ	552	return val >= sym_get_range_val(prop->expr->left.sym, 16) &&
4cf3cbe2 RZ	553	val <= sym_get_range_val(prop->expr->right.sym, 16);
1da177e4 LT	554	case S_BOOLEAN:
	555	case S_TRISTATE:
	556	switch (str[0]) {
	557	case 'y': case 'Y':
	558	return sym_tristate_within_range(sym, yes);
	559	case 'm': case 'M':
	560	return sym_tristate_within_range(sym, mod);
	561	case 'n': case 'N':
	562	return sym_tristate_within_range(sym, no);
	563	}
	564	return false;
	565	default:
	566	return false;
	567	}
	568	}
	569
	570	bool sym_set_string_value(struct symbol sym, const char newval)
	571	{
	572	const char *oldval;
	573	char *val;
	574	int size;
	575
	576	switch (sym->type) {
	577	case S_BOOLEAN:
	578	case S_TRISTATE:
	579	switch (newval[0]) {
	580	case 'y': case 'Y':
	581	return sym_set_tristate_value(sym, yes);
	582	case 'm': case 'M':
	583	return sym_set_tristate_value(sym, mod);
	584	case 'n': case 'N':
	585	return sym_set_tristate_value(sym, no);
	586	}
	587	return false;
	588	default:
	589	;
	590	}
	591
	592	if (!sym_string_within_range(sym, newval))
	593	return false;
	594
669bfad9 RZ	595	if (!(sym->flags & SYMBOL_DEF_USER)) {
669bfad9 RZ	596	sym->flags \|= SYMBOL_DEF_USER;
1da177e4 LT	597	sym_set_changed(sym);
	598	}
	599
0c1822e6	600	oldval = sym->def[S_DEF_USER].val;
1da177e4 LT	601	size = strlen(newval) + 1;
	602	if (sym->type == S_HEX && (newval[0] != '0' \|\| (newval[1] != 'x' && newval[1] != 'X'))) {
	603	size += 2;
0c1822e6	604	sym->def[S_DEF_USER].val = val = malloc(size);
1da177e4 LT	605	*val++ = '0';
	606	*val++ = 'x';
	607	} else if (!oldval \|\| strcmp(oldval, newval))
0c1822e6	608	sym->def[S_DEF_USER].val = val = malloc(size);
1da177e4 LT	609	else
	610	return true;
	611
	612	strcpy(val, newval);
	613	free((void *)oldval);
	614	sym_clear_all_valid();
	615
	616	return true;
	617	}
	618
	619	const char sym_get_string_value(struct symbol sym)
	620	{
	621	tristate val;
	622
	623	switch (sym->type) {
	624	case S_BOOLEAN:
	625	case S_TRISTATE:
	626	val = sym_get_tristate_value(sym);
	627	switch (val) {
	628	case no:
	629	return "n";
	630	case mod:
	631	return "m";
	632	case yes:
	633	return "y";
	634	}
	635	break;
	636	default:
	637	;
	638	}
	639	return (const char *)sym->curr.val;
	640	}
	641
	642	bool sym_is_changable(struct symbol *sym)
	643	{
	644	return sym->visible > sym->rev_dep.tri;
	645	}
	646
	647	struct symbol sym_lookup(const char name, int isconst)
	648	{
	649	struct symbol *symbol;
	650	const char *ptr;
	651	char *new_name;
	652	int hash = 0;
	653
	654	if (name) {
	655	if (name[0] && !name[1]) {
	656	switch (name[0]) {
	657	case 'y': return &symbol_yes;
	658	case 'm': return &symbol_mod;
	659	case 'n': return &symbol_no;
	660	}
	661	}
	662	for (ptr = name; *ptr; ptr++)
	663	hash += *ptr;
	664	hash &= 0xff;
	665
	666	for (symbol = symbol_hash[hash]; symbol; symbol = symbol->next) {
	667	if (!strcmp(symbol->name, name)) {
	668	if ((isconst && symbol->flags & SYMBOL_CONST) \|\|
	669	(!isconst && !(symbol->flags & SYMBOL_CONST)))
	670	return symbol;
	671	}
	672	}
673	new_name = strdup(name);
674	} else {
675	new_name = NULL;
676	hash = 256;
677	}
678
679	symbol = malloc(sizeof(*symbol));
680	memset(symbol, 0, sizeof(*symbol));
681	symbol->name = new_name;
682	symbol->type = S_UNKNOWN;
1da177e4 LT	683	if (isconst)
	684	symbol->flags \|= SYMBOL_CONST;
	685
	686	symbol->next = symbol_hash[hash];
	687	symbol_hash[hash] = symbol;
	688
	689	return symbol;
	690	}
	691
	692	struct symbol sym_find(const char name)
	693	{
	694	struct symbol *symbol = NULL;
	695	const char *ptr;
	696	int hash = 0;
	697
	698	if (!name)
	699	return NULL;
	700
	701	if (name[0] && !name[1]) {
	702	switch (name[0]) {
	703	case 'y': return &symbol_yes;
	704	case 'm': return &symbol_mod;
	705	case 'n': return &symbol_no;
	706	}
	707	}
	708	for (ptr = name; *ptr; ptr++)
	709	hash += *ptr;
	710	hash &= 0xff;
	711
	712	for (symbol = symbol_hash[hash]; symbol; symbol = symbol->next) {
	713	if (!strcmp(symbol->name, name) &&
	714	!(symbol->flags & SYMBOL_CONST))
	715	break;
	716	}
	717
	718	return symbol;
	719	}
	720
	721	struct symbol *sym_re_search(const char pattern)
	722	{
	723	struct symbol sym, *sym_arr = NULL;
	724	int i, cnt, size;
	725	regex_t re;
	726
	727	cnt = size = 0;
	728	/* Skip if empty */
	729	if (strlen(pattern) == 0)
	730	return NULL;
	731	if (regcomp(&re, pattern, REG_EXTENDED\|REG_NOSUB\|REG_ICASE))
	732	return NULL;
	733
	734	for_all_symbols(i, sym) {
	735	if (sym->flags & SYMBOL_CONST \|\| !sym->name)
	736	continue;
	737	if (regexec(&re, sym->name, 0, NULL, 0))
	738	continue;
	739	if (cnt + 1 >= size) {
	740	void *tmp = sym_arr;
	741	size += 16;
	742	sym_arr = realloc(sym_arr, size * sizeof(struct symbol *));
	743	if (!sym_arr) {
	744	free(tmp);
	745	return NULL;
	746	}
747	}
748	sym_arr[cnt++] = sym;
749	}
750	if (sym_arr)
751	sym_arr[cnt] = NULL;
752	regfree(&re);
753
754	return sym_arr;
755	}
756
757
758	struct symbol sym_check_deps(struct symbol sym);
759
760	static struct symbol sym_check_expr_deps(struct expr e)
761	{
762	struct symbol *sym;
763
764	if (!e)
765	return NULL;
766	switch (e->type) {
767	case E_OR:
768	case E_AND:
769	sym = sym_check_expr_deps(e->left.expr);
770	if (sym)
771	return sym;
772	return sym_check_expr_deps(e->right.expr);
773	case E_NOT:
774	return sym_check_expr_deps(e->left.expr);
775	case E_EQUAL:
776	case E_UNEQUAL:
777	sym = sym_check_deps(e->left.sym);
778	if (sym)
779	return sym;
780	return sym_check_deps(e->right.sym);
781	case E_SYMBOL:
782	return sym_check_deps(e->left.sym);
783	default:
784	break;
785	}
786	printf("Oops! How to check %d?\n", e->type);
787	return NULL;
788	}
789
5447d34b	790	/* return NULL when dependencies are OK */
1da177e4 LT	791	struct symbol sym_check_deps(struct symbol sym)
	792	{
	793	struct symbol *sym2;
	794	struct property *prop;
	795
1da177e4	796	if (sym->flags & SYMBOL_CHECK) {
5447d34b SR	797	fprintf(stderr, "%s:%d:error: found recursive dependency: %s",
5447d34b SR	798	sym->prop->file->name, sym->prop->lineno, sym->name);
1da177e4 LT	799	return sym;
1da177e4 LT	800	}
3f04e7dd DG	801	if (sym->flags & SYMBOL_CHECKED)
3f04e7dd DG	802	return NULL;
1da177e4 LT	803
	804	sym->flags \|= (SYMBOL_CHECK \| SYMBOL_CHECKED);
	805	sym2 = sym_check_expr_deps(sym->rev_dep.expr);
	806	if (sym2)
	807	goto out;
	808
	809	for (prop = sym->prop; prop; prop = prop->next) {
	810	if (prop->type == P_CHOICE \|\| prop->type == P_SELECT)
	811	continue;
	812	sym2 = sym_check_expr_deps(prop->visible.expr);
	813	if (sym2)
	814	goto out;
	815	if (prop->type != P_DEFAULT \|\| sym_is_choice(sym))
	816	continue;
	817	sym2 = sym_check_expr_deps(prop->expr);
	818	if (sym2)
	819	goto out;
	820	}
	821	out:
5447d34b SR	822	if (sym2)
5447d34b SR	823	fprintf(stderr, " -> %s%s", sym->name, sym2 == sym? "\n": "");
1da177e4 LT	824	sym->flags &= ~SYMBOL_CHECK;
	825	return sym2;
	826	}
	827
	828	struct property prop_alloc(enum prop_type type, struct symbol sym)
	829	{
	830	struct property *prop;
	831	struct property **propp;
	832
	833	prop = malloc(sizeof(*prop));
	834	memset(prop, 0, sizeof(*prop));
	835	prop->type = type;
	836	prop->sym = sym;
	837	prop->file = current_file;
	838	prop->lineno = zconf_lineno();
	839
	840	/* append property to the prop list of symbol */
	841	if (sym) {
	842	for (propp = &sym->prop; propp; propp = &(propp)->next)
	843	;
	844	*propp = prop;
	845	}
	846
	847	return prop;
	848	}
	849
	850	struct symbol prop_get_symbol(struct property prop)
	851	{
	852	if (prop->expr && (prop->expr->type == E_SYMBOL \|\|
7a962923	853	prop->expr->type == E_LIST))
1da177e4 LT	854	return prop->expr->left.sym;
	855	return NULL;
	856	}
	857
	858	const char *prop_get_type_name(enum prop_type type)
	859	{
	860	switch (type) {
	861	case P_PROMPT:
	862	return "prompt";
	863	case P_COMMENT:
	864	return "comment";
	865	case P_MENU:
	866	return "menu";
	867	case P_DEFAULT:
	868	return "default";
	869	case P_CHOICE:
	870	return "choice";
	871	case P_SELECT:
	872	return "select";
	873	case P_RANGE:
	874	return "range";
	875	case P_UNKNOWN:
	876	break;
	877	}
	878	return "unknown";
	879	}