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@2448: static 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@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: 
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@2448: static 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@2448: 	/* defaulting to "yes" if no explicit "depends on" are given */
yann@2448: 	tri = yes;
yann@2448: 	if (sym->dir_dep.expr)
yann@2448: 		tri = expr_calc_value(sym->dir_dep.expr);
yann@2448: 	if (tri == mod)
yann@2448: 		tri = yes;
yann@2448: 	if (sym->dir_dep.tri != tri) {
yann@2448: 		sym->dir_dep.tri = tri;
yann@2448: 		sym_set_changed(sym);
yann@2448: 	}
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@2448: /*
yann@2448:  * Find the default symbol for a choice.
yann@2448:  * First try the default values for the choice symbol
yann@2448:  * Next locate the first visible choice value
yann@2448:  * Return NULL if none was found
yann@2448:  */
yann@2448: struct symbol *sym_choice_default(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: 	/* 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: 		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@2448: 	expr_list_for_each_sym(prop->expr, e, def_sym)
yann@1: 		if (def_sym->visible != no)
yann@1: 			return def_sym;
yann@1: 
yann@2448: 	/* failed to locate any defaults */
yann@1: 	return NULL;
yann@1: }
yann@1: 
yann@2448: static struct symbol *sym_calc_choice(struct symbol *sym)
yann@2448: {
yann@2448: 	struct symbol *def_sym;
yann@2448: 	struct property *prop;
yann@2448: 	struct expr *e;
yann@2448: 
yann@2448: 	/* first calculate all choice values' visibilities */
yann@2448: 	prop = sym_get_choice_prop(sym);
yann@2448: 	expr_list_for_each_sym(prop->expr, e, def_sym)
yann@2448: 		sym_calc_visibility(def_sym);
yann@2448: 
yann@2448: 	/* is the user choice visible? */
yann@2448: 	def_sym = sym->def[S_DEF_USER].val;
yann@2448: 	if (def_sym && def_sym->visible != no)
yann@2448: 		return def_sym;
yann@2448: 
yann@2448: 	def_sym = sym_choice_default(sym);
yann@2448: 
yann@2448: 	if (def_sym == NULL)
yann@2448: 		/* no choice? reset tristate value */
yann@2448: 		sym->curr.tri = no;
yann@2448: 
yann@2448: 	return def_sym;
yann@2448: }
yann@2448: 
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@2448: 			if (sym->dir_dep.tri == no && sym->rev_dep.tri != no) {
yann@2448: 				struct expr *e;
yann@2448: 				e = expr_simplify_unmet_dep(sym->rev_dep.expr,
yann@2448: 				    sym->dir_dep.expr);
yann@2448: 				fprintf(stderr, "warning: (");
yann@2448: 				expr_fprint(e, stderr);
yann@2448: 				fprintf(stderr, ") selects %s which has unmet direct dependencies (",
yann@2448: 					sym->name);
yann@2448: 				expr_fprint(sym->dir_dep.expr, stderr);
yann@2448: 				fprintf(stderr, ")\n");
yann@2448: 				expr_free(e);
yann@2448: 			}
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@943: 
yann@1: 		prop = sym_get_choice_prop(sym);
yann@943: 		expr_list_for_each_sym(prop->expr, e, choice_sym) {
yann@2448: 			if ((sym->flags & SYMBOL_WRITE) &&
yann@2448: 			    choice_sym->visible != no)
yann@2448: 				choice_sym->flags |= SYMBOL_WRITE;
yann@2448: 			if (sym->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@2448: /*
yann@2448:  * Find the default value associated to a symbol.
yann@2448:  * For tristate symbol handle the modules=n case
yann@2448:  * in which case "m" becomes "y".
yann@2448:  * If the symbol does not have any default then fallback
yann@2448:  * to the fixed default values.
yann@2448:  */
yann@2448: const char *sym_get_string_default(struct symbol *sym)
yann@2448: {
yann@2448: 	struct property *prop;
yann@2448: 	struct symbol *ds;
yann@2448: 	const char *str;
yann@2448: 	tristate val;
yann@2448: 
yann@2448: 	sym_calc_visibility(sym);
yann@2448: 	sym_calc_value(modules_sym);
yann@2448: 	val = symbol_no.curr.tri;
yann@2448: 	str = symbol_empty.curr.val;
yann@2448: 
yann@2448: 	/* If symbol has a default value look it up */
yann@2448: 	prop = sym_get_default_prop(sym);
yann@2448: 	if (prop != NULL) {
yann@2448: 		switch (sym->type) {
yann@2448: 		case S_BOOLEAN:
yann@2448: 		case S_TRISTATE:
yann@2448: 			/* The visibility may limit the value from yes => mod */
yann@2448: 			val = EXPR_AND(expr_calc_value(prop->expr), prop->visible.tri);
yann@2448: 			break;
yann@2448: 		default:
yann@2448: 			/*
yann@2448: 			 * The following fails to handle the situation
yann@2448: 			 * where a default value is further limited by
yann@2448: 			 * the valid range.
yann@2448: 			 */
yann@2448: 			ds = prop_get_symbol(prop);
yann@2448: 			if (ds != NULL) {
yann@2448: 				sym_calc_value(ds);
yann@2448: 				str = (const char *)ds->curr.val;
yann@2448: 			}
yann@2448: 		}
yann@2448: 	}
yann@2448: 
yann@2448: 	/* Handle select statements */
yann@2448: 	val = EXPR_OR(val, sym->rev_dep.tri);
yann@2448: 
yann@2448: 	/* transpose mod to yes if modules are not enabled */
yann@2448: 	if (val == mod)
yann@2448: 		if (!sym_is_choice_value(sym) && modules_sym->curr.tri == no)
yann@2448: 			val = yes;
yann@2448: 
yann@2448: 	/* transpose mod to yes if type is bool */
yann@2448: 	if (sym->type == S_BOOLEAN && val == mod)
yann@2448: 		val = yes;
yann@2448: 
yann@2448: 	switch (sym->type) {
yann@2448: 	case S_BOOLEAN:
yann@2448: 	case S_TRISTATE:
yann@2448: 		switch (val) {
yann@2448: 		case no: return "n";
yann@2448: 		case mod: return "m";
yann@2448: 		case yes: return "y";
yann@2448: 		}
yann@2448: 	case S_INT:
yann@2448: 	case S_HEX:
yann@2448: 		return str;
yann@2448: 	case S_STRING:
yann@2448: 		return str;
yann@2448: 	case S_OTHER:
yann@2448: 	case S_UNKNOWN:
yann@2448: 		break;
yann@2448: 	}
yann@2448: 	return "";
yann@2448: }
yann@2448: 
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@2448: static unsigned strhash(const char *s)
yann@2448: {
yann@2448: 	/* fnv32 hash */
yann@2448: 	unsigned hash = 2166136261U;
yann@2448: 	for (; *s; s++)
yann@2448: 		hash = (hash ^ *s) * 0x01000193;
yann@2448: 	return hash;
yann@2448: }
yann@2448: 
yann@943: struct symbol *sym_lookup(const char *name, int flags)
yann@1: {
yann@1: 	struct symbol *symbol;
yann@1: 	char *new_name;
yann@2448: 	int hash;
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@2448: 		hash = strhash(name) % SYMBOL_HASHSIZE;
yann@1: 
yann@1: 		for (symbol = symbol_hash[hash]; symbol; symbol = symbol->next) {
yann@2448: 			if (symbol->name &&
yann@2448: 			    !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@2448: 		hash = 0;
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: 	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@2448: 	hash = strhash(name) % SYMBOL_HASHSIZE;
yann@1: 
yann@1: 	for (symbol = symbol_hash[hash]; symbol; symbol = symbol->next) {
yann@2448: 		if (symbol->name &&
yann@2448: 		    !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@2448: /*
yann@2448:  * Expand symbol's names embedded in the string given in argument. Symbols'
yann@2448:  * name to be expanded shall be prefixed by a '$'. Unknown symbol expands to
yann@2448:  * the empty string.
yann@2448:  */
yann@2448: const char *sym_expand_string_value(const char *in)
yann@2448: {
yann@2448: 	const char *src;
yann@2448: 	char *res;
yann@2448: 	size_t reslen;
yann@2448: 
yann@2448: 	reslen = strlen(in) + 1;
yann@2448: 	res = malloc(reslen);
yann@2448: 	res[0] = '\0';
yann@2448: 
yann@2448: 	while ((src = strchr(in, '$'))) {
yann@2448: 		char *p, name[SYMBOL_MAXLENGTH];
yann@2448: 		const char *symval = "";
yann@2448: 		struct symbol *sym;
yann@2448: 		size_t newlen;
yann@2448: 
yann@2448: 		strncat(res, in, src - in);
yann@2448: 		src++;
yann@2448: 
yann@2448: 		p = name;
yann@2448: 		while (isalnum(*src) || *src == '_')
yann@2448: 			*p++ = *src++;
yann@2448: 		*p = '\0';
yann@2448: 
yann@2448: 		sym = sym_find(name);
yann@2448: 		if (sym != NULL) {
yann@2448: 			sym_calc_value(sym);
yann@2448: 			symval = sym_get_string_value(sym);
yann@2448: 		}
yann@2448: 
yann@2448: 		newlen = strlen(res) + strlen(symval) + strlen(src) + 1;
yann@2448: 		if (newlen > reslen) {
yann@2448: 			reslen = newlen;
yann@2448: 			res = realloc(res, reslen);
yann@2448: 		}
yann@2448: 
yann@2448: 		strcat(res, symval);
yann@2448: 		in = src;
yann@2448: 	}
yann@2448: 	strcat(res, in);
yann@2448: 
yann@2448: 	return res;
yann@2448: }
yann@2448: 
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@2448: 		sym_calc_value(sym);
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@2448: /*
yann@2448:  * When we check for recursive dependencies we use a stack to save
yann@2448:  * current state so we can print out relevant info to user.
yann@2448:  * The entries are located on the call stack so no need to free memory.
yann@2448:  * Note inser() remove() must always match to properly clear the stack.
yann@2448:  */
yann@2448: static struct dep_stack {
yann@2448: 	struct dep_stack *prev, *next;
yann@2448: 	struct symbol *sym;
yann@2448: 	struct property *prop;
yann@2448: 	struct expr *expr;
yann@2448: } *check_top;
yann@2448: 
yann@2448: static void dep_stack_insert(struct dep_stack *stack, struct symbol *sym)
yann@2448: {
yann@2448: 	memset(stack, 0, sizeof(*stack));
yann@2448: 	if (check_top)
yann@2448: 		check_top->next = stack;
yann@2448: 	stack->prev = check_top;
yann@2448: 	stack->sym = sym;
yann@2448: 	check_top = stack;
yann@2448: }
yann@2448: 
yann@2448: static void dep_stack_remove(void)
yann@2448: {
yann@2448: 	check_top = check_top->prev;
yann@2448: 	if (check_top)
yann@2448: 		check_top->next = NULL;
yann@2448: }
yann@2448: 
yann@2448: /*
yann@2448:  * Called when we have detected a recursive dependency.
yann@2448:  * check_top point to the top of the stact so we use
yann@2448:  * the ->prev pointer to locate the bottom of the stack.
yann@2448:  */
yann@2448: static void sym_check_print_recursive(struct symbol *last_sym)
yann@2448: {
yann@2448: 	struct dep_stack *stack;
yann@2448: 	struct symbol *sym, *next_sym;
yann@2448: 	struct menu *menu = NULL;
yann@2448: 	struct property *prop;
yann@2448: 	struct dep_stack cv_stack;
yann@2448: 
yann@2448: 	if (sym_is_choice_value(last_sym)) {
yann@2448: 		dep_stack_insert(&cv_stack, last_sym);
yann@2448: 		last_sym = prop_get_symbol(sym_get_choice_prop(last_sym));
yann@2448: 	}
yann@2448: 
yann@2448: 	for (stack = check_top; stack != NULL; stack = stack->prev)
yann@2448: 		if (stack->sym == last_sym)
yann@2448: 			break;
yann@2448: 	if (!stack) {
yann@2448: 		fprintf(stderr, "unexpected recursive dependency error\n");
yann@2448: 		return;
yann@2448: 	}
yann@2448: 
yann@2448: 	for (; stack; stack = stack->next) {
yann@2448: 		sym = stack->sym;
yann@2448: 		next_sym = stack->next ? stack->next->sym : last_sym;
yann@2448: 		prop = stack->prop;
yann@2448: 		if (prop == NULL)
yann@2448: 			prop = stack->sym->prop;
yann@2448: 
yann@2448: 		/* for choice values find the menu entry (used below) */
yann@2448: 		if (sym_is_choice(sym) || sym_is_choice_value(sym)) {
yann@2448: 			for (prop = sym->prop; prop; prop = prop->next) {
yann@2448: 				menu = prop->menu;
yann@2448: 				if (prop->menu)
yann@2448: 					break;
yann@2448: 			}
yann@2448: 		}
yann@2448: 		if (stack->sym == last_sym)
yann@2448: 			fprintf(stderr, "%s:%d:error: recursive dependency detected!\n",
yann@2448: 				prop->file->name, prop->lineno);
yann@2448: 		if (stack->expr) {
yann@2448: 			fprintf(stderr, "%s:%d:\tsymbol %s %s value contains %s\n",
yann@2448: 				prop->file->name, prop->lineno,
yann@2448: 				sym->name ? sym->name : "<choice>",
yann@2448: 				prop_get_type_name(prop->type),
yann@2448: 				next_sym->name ? next_sym->name : "<choice>");
yann@2448: 		} else if (stack->prop) {
yann@2448: 			fprintf(stderr, "%s:%d:\tsymbol %s depends on %s\n",
yann@2448: 				prop->file->name, prop->lineno,
yann@2448: 				sym->name ? sym->name : "<choice>",
yann@2448: 				next_sym->name ? next_sym->name : "<choice>");
yann@2448: 		} else if (sym_is_choice(sym)) {
yann@2448: 			fprintf(stderr, "%s:%d:\tchoice %s contains symbol %s\n",
yann@2448: 				menu->file->name, menu->lineno,
yann@2448: 				sym->name ? sym->name : "<choice>",
yann@2448: 				next_sym->name ? next_sym->name : "<choice>");
yann@2448: 		} else if (sym_is_choice_value(sym)) {
yann@2448: 			fprintf(stderr, "%s:%d:\tsymbol %s is part of choice %s\n",
yann@2448: 				menu->file->name, menu->lineno,
yann@2448: 				sym->name ? sym->name : "<choice>",
yann@2448: 				next_sym->name ? next_sym->name : "<choice>");
yann@2448: 		} else {
yann@2448: 			fprintf(stderr, "%s:%d:\tsymbol %s is selected by %s\n",
yann@2448: 				prop->file->name, prop->lineno,
yann@2448: 				sym->name ? sym->name : "<choice>",
yann@2448: 				next_sym->name ? next_sym->name : "<choice>");
yann@2448: 		}
yann@2448: 	}
yann@2448: 
yann@2448: 	if (check_top == &cv_stack)
yann@2448: 		dep_stack_remove();
yann@2448: }
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@2448: 	struct dep_stack stack;
yann@2448: 
yann@2448: 	dep_stack_insert(&stack, sym);
yann@943: 
yann@943: 	sym2 = sym_check_expr_deps(sym->rev_dep.expr);
yann@943: 	if (sym2)
yann@2448: 		goto out;
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@2448: 		stack.prop = prop;
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@2448: 		stack.expr = prop->expr;
yann@943: 		sym2 = sym_check_expr_deps(prop->expr);
yann@943: 		if (sym2)
yann@943: 			break;
yann@2448: 		stack.expr = NULL;
yann@943: 	}
yann@943: 
yann@2448: out:
yann@2448: 	dep_stack_remove();
yann@2448: 
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@2448: 	struct dep_stack stack;
yann@2448: 
yann@2448: 	dep_stack_insert(&stack, choice);
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@2448: 		if (sym2)
yann@943: 			break;
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@2448: 	dep_stack_remove();
yann@2448: 
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@2448: 		sym_check_print_recursive(sym);
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@2448: 		struct dep_stack stack;
yann@2448: 
yann@943: 		/* for choice groups start the check with main choice symbol */
yann@2448: 		dep_stack_insert(&stack, sym);
yann@943: 		prop = sym_get_choice_prop(sym);
yann@943: 		sym2 = sym_check_deps(prop_get_symbol(prop));
yann@2448: 		dep_stack_remove();
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@2448: 	if (sym2 && sym2 == sym)
yann@2448: 		sym2 = NULL;
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@2448: 	case P_SYMBOL:
yann@2448: 		return "symbol";
yann@1: 	case P_UNKNOWN:
yann@1: 		break;
yann@1: 	}
yann@1: 	return "unknown";
yann@1: }
yann@943: 
yann@2448: static 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: }