root/trunk/freewrt/tools/config/menu.c

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

#include <stdlib.h>
#include <string.h>

#define LKC_DIRECT_LINK
#include "lkc.h"

struct menu rootmenu;
struct menu *current_menu, *current_entry;
static struct menu **last_entry_ptr;

struct file *file_list;
struct file *current_file;

static void menu_warn(struct menu *menu, const char *fmt, ...)
{
        va_list ap;
        va_start(ap, fmt);
        fprintf(stderr, "%s:%d:warning: ", menu->file->name, menu->lineno);
        vfprintf(stderr, fmt, ap);
        fprintf(stderr, "\n");
        va_end(ap);
}

static void prop_warn(struct property *prop, const char *fmt, ...)
{
        va_list ap;
        va_start(ap, fmt);
        fprintf(stderr, "%s:%d:warning: ", prop->file->name, prop->lineno);
        vfprintf(stderr, fmt, ap);
        fprintf(stderr, "\n");
        va_end(ap);
}

void menu_init(void)
{
        current_entry = current_menu = &rootmenu;
        last_entry_ptr = &rootmenu.list;
}

void menu_add_entry(struct symbol *sym)
{
        struct menu *menu;

        menu = malloc(sizeof(*menu));
        memset(menu, 0, sizeof(*menu));
        menu->sym = sym;
        menu->parent = current_menu;
        menu->file = current_file;
        menu->lineno = zconf_lineno();

        *last_entry_ptr = menu;
        last_entry_ptr = &menu->next;
        current_entry = menu;
}

void menu_end_entry(void)
{
}

void menu_add_menu(void)
{
        current_menu = current_entry;
        last_entry_ptr = &current_entry->list;
}

void menu_end_menu(void)
{
        last_entry_ptr = &current_menu->next;
        current_menu = current_menu->parent;
}

struct expr *menu_check_dep(struct expr *e)
{
        if (!e)
                return e;

        switch (e->type) {
        case E_NOT:
                e->left.expr = menu_check_dep(e->left.expr);
                break;
        case E_OR:
        case E_AND:
                e->left.expr = menu_check_dep(e->left.expr);
                e->right.expr = menu_check_dep(e->right.expr);
                break;
        case E_SYMBOL:
                /* change 'm' into 'm' && MODULES */
                if (e->left.sym == &symbol_mod)
                        return expr_alloc_and(e, expr_alloc_symbol(modules_sym));
                break;
        default:
                break;
        }
        return e;
}

void menu_add_dep(struct expr *dep)
{
        current_entry->dep = expr_alloc_and(current_entry->dep, menu_check_dep(dep));
}

void menu_set_type(int type)
{
        struct symbol *sym = current_entry->sym;

        if (sym->type == type)
                return;
        if (sym->type == S_UNKNOWN) {
                sym->type = type;
                return;
        }
        menu_warn(current_entry, "type of '%s' redefined from '%s' to '%s'\n",
            sym->name ? sym->name : "<choice>",
            sym_type_name(sym->type), sym_type_name(type));
}

struct property *menu_add_prop(enum prop_type type, char *prompt, struct expr *expr, struct expr *dep)
{
        struct property *prop = prop_alloc(type, current_entry->sym);

        prop->menu = current_entry;
        prop->text = prompt;
        prop->expr = expr;
        prop->visible.expr = menu_check_dep(dep);

        if (prompt) {
                if (current_entry->prompt)
                        menu_warn(current_entry, "prompt redefined\n");
                current_entry->prompt = prop;
        }

        return prop;
}

void menu_add_prompt(enum prop_type type, char *prompt, struct expr *dep)
{
        menu_add_prop(type, prompt, NULL, dep);
}

void menu_add_expr(enum prop_type type, struct expr *expr, struct expr *dep)
{
        menu_add_prop(type, NULL, expr, dep);
}

void menu_add_symbol(enum prop_type type, struct symbol *sym, struct expr *dep)
{
        menu_add_prop(type, NULL, expr_alloc_symbol(sym), dep);
}

void sym_check_prop(struct symbol *sym)
{
        struct property *prop;
        struct symbol *sym2;
        for (prop = sym->prop; prop; prop = prop->next) {
                switch (prop->type) {
                case P_DEFAULT:
                        if ((sym->type == S_STRING || sym->type == S_INT || sym->type == S_HEX) &&
                            prop->expr->type != E_SYMBOL)
                                prop_warn(prop,
                                    "default for config symbol '%'"
                                    " must be a single symbol", sym->name);
                        break;
                case P_SELECT:
                case P_SELECTNOT:
                        sym2 = prop_get_symbol(prop);
                        if (sym->type != S_BOOLEAN && sym->type != S_TRISTATE)
                                prop_warn(prop,
                                    "config symbol '%s' uses select, but is "
                                    "not boolean or tristate", sym->name);
                        else if (sym2->type == S_UNKNOWN)
                                prop_warn(prop,
                                    "'select' used by config symbol '%s' "
                                    "refer to undefined symbol '%s'",
                                    sym->name, sym2->name);
                        else if (sym2->type != S_BOOLEAN && sym2->type != S_TRISTATE)
                                prop_warn(prop,
                                    "'%s' has wrong type. 'select' only "
                                    "accept arguments of boolean and "
                                    "tristate type", sym2->name);
                        break;
                case P_RANGE:
                        if (sym->type != S_INT && sym->type != S_HEX)
                                prop_warn(prop, "range is only allowed "
                                                "for int or hex symbols");
                        if (!sym_string_valid(sym, prop->expr->left.sym->name) ||
                            !sym_string_valid(sym, prop->expr->right.sym->name))
                                prop_warn(prop, "range is invalid");
                        break;
                default:
                        ;
                }
        }
}

void menu_finalize(struct menu *parent)
{
        struct menu *menu, *last_menu;
        struct symbol *sym;
        struct property *prop;
        struct expr *parentdep, *basedep, *dep, *dep2, **ep;

        sym = parent->sym;
        if (parent->list) {
                if (sym && sym_is_choice(sym)) {
                        /* find the first choice value and find out choice type */
                        for (menu = parent->list; menu; menu = menu->next) {
                                if (menu->sym) {
                                        current_entry = parent;
                                        menu_set_type(menu->sym->type);
                                        current_entry = menu;
                                        menu_set_type(sym->type);
                                        break;
                                }
                        }
                        parentdep = expr_alloc_symbol(sym);
                } else if (parent->prompt)
                        parentdep = parent->prompt->visible.expr;
                else
                        parentdep = parent->dep;

                for (menu = parent->list; menu; menu = menu->next) {
                        basedep = expr_transform(menu->dep);
                        basedep = expr_alloc_and(expr_copy(parentdep), basedep);
                        basedep = expr_eliminate_dups(basedep);
                        menu->dep = basedep;
                        if (menu->sym)
                                prop = menu->sym->prop;
                        else
                                prop = menu->prompt;
                        for (; prop; prop = prop->next) {
                                if (prop->menu != menu)
                                        continue;
                                dep = expr_transform(prop->visible.expr);
                                dep = expr_alloc_and(expr_copy(basedep), dep);
                                dep = expr_eliminate_dups(dep);
                                if (menu->sym && menu->sym->type != S_TRISTATE)
                                        dep = expr_trans_bool(dep);
                                prop->visible.expr = dep;
                                if (prop->type == P_SELECT) {
                                        struct symbol *es = prop_get_symbol(prop);
                                        es->rev_dep.expr = expr_alloc_or(es->rev_dep.expr,
                                                        expr_alloc_and(expr_alloc_symbol(menu->sym), expr_copy(dep)));
                                } else if (prop->type == P_SELECTNOT) {
                                        struct symbol *es = prop_get_symbol(prop);
                                        es->rev_dep_inv.expr = expr_alloc_or(es->rev_dep_inv.expr,
                                                        expr_alloc_and(expr_alloc_symbol(menu->sym), expr_copy(dep)));
                                }
                        }
                }
                for (menu = parent->list; menu; menu = menu->next)
                        menu_finalize(menu);
        } else if (sym) {
                basedep = parent->prompt ? parent->prompt->visible.expr : NULL;
                basedep = expr_trans_compare(basedep, E_UNEQUAL, &symbol_no);
                basedep = expr_eliminate_dups(expr_transform(basedep));
                last_menu = NULL;
                for (menu = parent->next; menu; menu = menu->next) {
                        dep = menu->prompt ? menu->prompt->visible.expr : menu->dep;
                        if (!expr_contains_symbol(dep, sym))
                                break;
                        if (expr_depends_symbol(dep, sym))
                                goto next;
                        dep = expr_trans_compare(dep, E_UNEQUAL, &symbol_no);
                        dep = expr_eliminate_dups(expr_transform(dep));
                        dep2 = expr_copy(basedep);
                        expr_eliminate_eq(&dep, &dep2);
                        expr_free(dep);
                        if (!expr_is_yes(dep2)) {
                                expr_free(dep2);
                                break;
                        }
                        expr_free(dep2);
                next:
                        menu_finalize(menu);
                        menu->parent = parent;
                        last_menu = menu;
                }
                if (last_menu) {
                        parent->list = parent->next;
                        parent->next = last_menu->next;
                        last_menu->next = NULL;
                }
        }
        for (menu = parent->list; menu; menu = menu->next) {
                if (sym && sym_is_choice(sym) && menu->sym) {
                        menu->sym->flags |= SYMBOL_CHOICEVAL;
                        if (!menu->prompt)
                                menu_warn(menu, "choice value must have a prompt");
                        for (prop = menu->sym->prop; prop; prop = prop->next) {
                                if (prop->type == P_PROMPT && prop->menu != menu) {
                                        prop_warn(prop, "choice values "
                                            "currently only support a "
                                            "single prompt");
                                }
                                if (prop->type == P_DEFAULT)
                                        prop_warn(prop, "defaults for choice "
                                            "values not supported");
                        }
                        current_entry = menu;
                        menu_set_type(sym->type);
                        menu_add_symbol(P_CHOICE, sym, NULL);
                        prop = sym_get_choice_prop(sym);
                        for (ep = &prop->expr; *ep; ep = &(*ep)->left.expr)
                                ;
                        *ep = expr_alloc_one(E_CHOICE, NULL);
                        (*ep)->right.sym = menu->sym;
                }
                if (menu->list && (!menu->prompt || !menu->prompt->text)) {
                        for (last_menu = menu->list; ; last_menu = last_menu->next) {
                                last_menu->parent = parent;
                                if (!last_menu->next)
                                        break;
                        }
                        last_menu->next = menu->next;
                        menu->next = menu->list;
                        menu->list = NULL;
                }
        }

        if (sym && !(sym->flags & SYMBOL_WARNED)) {
                if (sym->type == S_UNKNOWN)
                        menu_warn(parent, "config symbol defined "
                            "without type\n");

                if (sym_is_choice(sym) && !parent->prompt)
                        menu_warn(parent, "choice must have a prompt\n");

                /* Check properties connected to this symbol */
                sym_check_prop(sym);
                sym->flags |= SYMBOL_WARNED;
        }

        if (sym && !sym_is_optional(sym) && parent->prompt) {
                sym->rev_dep.expr = expr_alloc_or(sym->rev_dep.expr,
                                expr_alloc_and(parent->prompt->visible.expr,
                                        expr_alloc_symbol(&symbol_mod)));
        }
}

bool menu_is_visible(struct menu *menu)
{
        struct menu *child;
        struct symbol *sym;
        tristate visible;

        if (!menu->prompt)
                return false;
        sym = menu->sym;
        if (sym) {
                sym_calc_value(sym);
                visible = menu->prompt->visible.tri;
        } else
                visible = menu->prompt->visible.tri = expr_calc_value(menu->prompt->visible.expr);

        if (visible != no)
                return true;
        if (!sym || sym_get_tristate_value(menu->sym) == no)
                return false;

        for (child = menu->list; child; child = child->next)
                if (menu_is_visible(child))
                        return true;
        return false;
}

const char *menu_get_prompt(struct menu *menu)
{
        if (menu->prompt)
                return menu->prompt->text;
        else if (menu->sym)
                return menu->sym->name;
        return NULL;
}

struct menu *menu_get_root_menu(struct menu *menu)
{
        return &rootmenu;
}

struct menu *menu_get_parent_menu(struct menu *menu)
{
        enum prop_type type;

        for (; menu != &rootmenu; menu = menu->parent) {
                type = menu->prompt ? menu->prompt->type : 0;
                if (type == P_MENU)
                        break;
        }
        return menu;
}

struct file *file_lookup(const char *name)
{
        struct file *file;

        for (file = file_list; file; file = file->next) {
                if (!strcmp(name, file->name))
                        return file;
        }

        file = malloc(sizeof(*file));
        memset(file, 0, sizeof(*file));
        file->name = strdup(name);
        file->next = file_list;
        file_list = file;
        return file;
}

int file_write_dep(const char *name)
{
        struct file *file;
        FILE *out;

        if (!name)
                name = ".config.cmd";
        out = fopen(".config.tmp", "w");
        if (!out)
                return 1;
        fprintf(out, "deps_config := \\\n");
        for (file = file_list; file; file = file->next) {
                if (file->next)
                        fprintf(out, "\t%s \\\n", file->name);
                else
                        fprintf(out, "\t%s\n", file->name);
        }
        fprintf(out, "\n.config include/config.h: $(deps_config)\n\n$(deps_config):\n");
        fclose(out);
        rename(".config.tmp", name);
        return 0;
}