/* SPDX-License-Identifier: GPL-2.0 */

/*

* Copyright (C) 2002 Roman Zippel <zippel@linux-m68k.org>

*/

%{

#include <ctype.h>

#include <stdarg.h>

#include <stdio.h>

#include <stdlib.h>

#include <string.h>

#include <stdbool.h>

#include <xalloc.h>

#include "lkc.h"

#include "internal.h"

#include "preprocess.h"

#define printd(mask, fmt...) if (cdebug & (mask)) printf(fmt)

#define PRINTD 0x0001

#define DEBUG_PARSE 0x0002

int cdebug = PRINTD;

static void yyerror(const char *err);

static void zconf_error(const char *err, ...);

static bool zconf_endtoken(const char *tokenname,

const char *expected_tokenname);

struct menu *current_menu, *current_entry, *current_choice;

%}

%union

{

char *string;

struct symbol *symbol;

struct expr *expr;

struct menu *menu;

enum symbol_type type;

enum variable_flavor flavor;

}

%token <string> T_HELPTEXT

%token <string> T_WORD

%token <string> T_WORD_QUOTE

%token T_BOOL

%token T_CHOICE

%token T_CLOSE_PAREN

%token T_COLON_EQUAL

%token T_COMMENT

%token T_CONFIG

%token T_DEFAULT

%token T_DEF_BOOL

%token T_DEF_TRISTATE

%token T_DEPENDS

%token T_ENDCHOICE

%token T_ENDIF

%token T_ENDMENU

%token T_HELP

%token T_HEX

%token T_IF

%token T_IMPLY

%token T_INT

%token T_MAINMENU

%token T_MENU

%token T_MENUCONFIG

%token T_MODULES

%token T_ON

%token T_OPEN_PAREN

%token T_PLUS_EQUAL

%token T_PROMPT

%token T_RANGE

%token T_SELECT

%token T_SOURCE

%token T_STRING

%token T_TRANSITIONAL

%token T_TRISTATE

%token T_VISIBLE

%token T_EOL

%token <string> T_ASSIGN_VAL

%left T_OR

%left T_AND

%left T_EQUAL T_UNEQUAL

%left T_LESS T_LESS_EQUAL T_GREATER T_GREATER_EQUAL

%nonassoc T_NOT

%type <symbol> nonconst_symbol

%type <symbol> symbol

%type <type> type default

%type <expr> expr

%type <expr> if_expr

%type <string> end

%type <menu> if_entry menu_entry choice_entry

%type <string> assign_val

%type <flavor> assign_op

%destructor {

fprintf(stderr, "%s:%d: missing end statement for this entry\n",

$$->filename, $$->lineno);

if (current_menu == $$)

menu_end_menu();

} if_entry menu_entry choice_entry

%%

input: mainmenu_stmt stmt_list | stmt_list;

/* mainmenu entry */

mainmenu_stmt: T_MAINMENU T_WORD_QUOTE T_EOL

{

menu_add_prompt(P_MENU, $2, NULL);

};

stmt_list:

/* empty */

| stmt_list assignment_stmt

| stmt_list choice_stmt

| stmt_list comment_stmt

| stmt_list config_stmt

| stmt_list if_stmt

| stmt_list menu_stmt

| stmt_list menuconfig_stmt

| stmt_list source_stmt

| stmt_list T_WORD error T_EOL { zconf_error("unknown statement \"%s\"", $2); }

| stmt_list error T_EOL { zconf_error("invalid statement"); }

;

stmt_list_in_choice:

/* empty */

| stmt_list_in_choice comment_stmt

| stmt_list_in_choice config_stmt

| stmt_list_in_choice if_stmt_in_choice

| stmt_list_in_choice error T_EOL { zconf_error("invalid statement"); }

;

/* config/menuconfig entry */

config_entry_start: T_CONFIG nonconst_symbol T_EOL

{

menu_add_entry($2, M_NORMAL);

printd(DEBUG_PARSE, "%s:%d:config %s\n", cur_filename, cur_lineno, $2->name);

};

config_stmt: config_entry_start config_option_list

{

if (current_choice) {

if (!current_entry->prompt) {

fprintf(stderr, "%s:%d: error: choice member must have a prompt\n",

current_entry->filename, current_entry->lineno);

yynerrs++;

}

if (current_entry->sym->type != S_BOOLEAN) {

fprintf(stderr, "%s:%d: error: choice member must be bool\n",

current_entry->filename, current_entry->lineno);

yynerrs++;

}

list_add_tail(&current_entry->sym->choice_link,

&current_choice->choice_members);

}

printd(DEBUG_PARSE, "%s:%d:endconfig\n", cur_filename, cur_lineno);

};

menuconfig_entry_start: T_MENUCONFIG nonconst_symbol T_EOL

{

menu_add_entry($2, M_MENU);

printd(DEBUG_PARSE, "%s:%d:menuconfig %s\n", cur_filename, cur_lineno, $2->name);

};

menuconfig_stmt: menuconfig_entry_start config_option_list

{

if (current_entry->prompt)

current_entry->prompt->type = P_MENU;

else

zconf_error("menuconfig statement without prompt");

printd(DEBUG_PARSE, "%s:%d:endconfig\n", cur_filename, cur_lineno);

};

config_option_list:

/* empty */

| config_option_list config_option

| config_option_list depends

| config_option_list help

;

config_option: type prompt_stmt_opt T_EOL

{

menu_set_type($1);

printd(DEBUG_PARSE, "%s:%d:type(%u)\n", cur_filename, cur_lineno, $1);

};

config_option: T_PROMPT T_WORD_QUOTE if_expr T_EOL

{

menu_add_prompt(P_PROMPT, $2, $3);

printd(DEBUG_PARSE, "%s:%d:prompt\n", cur_filename, cur_lineno);

};

config_option: T_TRANSITIONAL T_EOL

{

current_entry->sym->flags |= SYMBOL_TRANS;

printd(DEBUG_PARSE, "%s:%d:transitional\n", cur_filename, cur_lineno);

};

config_option: default expr if_expr T_EOL

{

menu_add_expr(P_DEFAULT, $2, $3);

if ($1 != S_UNKNOWN)

menu_set_type($1);

printd(DEBUG_PARSE, "%s:%d:default(%u)\n", cur_filename, cur_lineno,

$1);

};

config_option: T_SELECT nonconst_symbol if_expr T_EOL

{

menu_add_symbol(P_SELECT, $2, $3);

printd(DEBUG_PARSE, "%s:%d:select\n", cur_filename, cur_lineno);

};

config_option: T_IMPLY nonconst_symbol if_expr T_EOL

{

menu_add_symbol(P_IMPLY, $2, $3);

printd(DEBUG_PARSE, "%s:%d:imply\n", cur_filename, cur_lineno);

};

config_option: T_RANGE symbol symbol if_expr T_EOL

{

menu_add_expr(P_RANGE, expr_alloc_comp(E_RANGE,$2, $3), $4);

printd(DEBUG_PARSE, "%s:%d:range\n", cur_filename, cur_lineno);

};

config_option: T_MODULES T_EOL

{

if (modules_sym)

zconf_error("symbol '%s' redefines option 'modules' already defined by symbol '%s'",

current_entry->sym->name, modules_sym->name);

modules_sym = current_entry->sym;

};

/* choice entry */

choice: T_CHOICE T_EOL

{

struct symbol *sym = sym_lookup(NULL, 0);

menu_add_entry(sym, M_CHOICE);

menu_set_type(S_BOOLEAN);

INIT_LIST_HEAD(&current_entry->choice_members);

printd(DEBUG_PARSE, "%s:%d:choice\n", cur_filename, cur_lineno);

};

choice_entry: choice choice_option_list

{

if (!current_entry->prompt) {

fprintf(stderr, "%s:%d: error: choice must have a prompt\n",

current_entry->filename, current_entry->lineno);

yynerrs++;

}

$$ = menu_add_menu();

current_choice = current_entry;

};

choice_end: end

{

current_choice = NULL;

if (zconf_endtoken($1, "choice")) {

menu_end_menu();

printd(DEBUG_PARSE, "%s:%d:endchoice\n", cur_filename, cur_lineno);

}

};

choice_stmt: choice_entry stmt_list_in_choice choice_end

;

choice_option_list:

/* empty */

| choice_option_list choice_option

| choice_option_list depends

| choice_option_list help

;

choice_option: T_PROMPT T_WORD_QUOTE if_expr T_EOL

{

menu_add_prompt(P_PROMPT, $2, $3);

printd(DEBUG_PARSE, "%s:%d:prompt\n", cur_filename, cur_lineno);

};

choice_option: T_DEFAULT nonconst_symbol if_expr T_EOL

{

menu_add_symbol(P_DEFAULT, $2, $3);

printd(DEBUG_PARSE, "%s:%d:default\n", cur_filename, cur_lineno);

};

type:

T_BOOL { $$ = S_BOOLEAN; }

| T_TRISTATE { $$ = S_TRISTATE; }

| T_INT { $$ = S_INT; }

| T_HEX { $$ = S_HEX; }

| T_STRING { $$ = S_STRING; }

default:

T_DEFAULT { $$ = S_UNKNOWN; }

| T_DEF_BOOL { $$ = S_BOOLEAN; }

| T_DEF_TRISTATE { $$ = S_TRISTATE; }

/* if entry */

if_entry: T_IF expr T_EOL

{

printd(DEBUG_PARSE, "%s:%d:if\n", cur_filename, cur_lineno);

menu_add_entry(NULL, M_IF);

menu_add_dep($2, NULL);

$$ = menu_add_menu();

};

if_end: end

{

if (zconf_endtoken($1, "if")) {

menu_end_menu();

printd(DEBUG_PARSE, "%s:%d:endif\n", cur_filename, cur_lineno);

}

};

if_stmt: if_entry stmt_list if_end

;

if_stmt_in_choice: if_entry stmt_list_in_choice if_end

;

/* menu entry */

menu: T_MENU T_WORD_QUOTE T_EOL

{

menu_add_entry(NULL, M_MENU);

menu_add_prompt(P_MENU, $2, NULL);

printd(DEBUG_PARSE, "%s:%d:menu\n", cur_filename, cur_lineno);

};

menu_entry: menu menu_option_list

{

$$ = menu_add_menu();

};

menu_end: end

{

if (zconf_endtoken($1, "menu")) {

menu_end_menu();

printd(DEBUG_PARSE, "%s:%d:endmenu\n", cur_filename, cur_lineno);

}

};

menu_stmt: menu_entry stmt_list menu_end

;

menu_option_list:

/* empty */

| menu_option_list visible

| menu_option_list depends

;

source_stmt: T_SOURCE T_WORD_QUOTE T_EOL

{

printd(DEBUG_PARSE, "%s:%d:source %s\n", cur_filename, cur_lineno, $2);

zconf_nextfile($2);

free($2);

};

/* comment entry */

comment: T_COMMENT T_WORD_QUOTE T_EOL

{

menu_add_entry(NULL, M_COMMENT);

menu_add_prompt(P_COMMENT, $2, NULL);

printd(DEBUG_PARSE, "%s:%d:comment\n", cur_filename, cur_lineno);

};

comment_stmt: comment comment_option_list

;

comment_option_list:

/* empty */

| comment_option_list depends

;

/* help option */

help_start: T_HELP T_EOL

{

printd(DEBUG_PARSE, "%s:%d:help\n", cur_filename, cur_lineno);

zconf_starthelp();

};

help: help_start T_HELPTEXT

{

if (current_entry->help) {

free(current_entry->help);

zconf_error("'%s' defined with more than one help text",

current_entry->sym->name ?: "<choice>");

}

/* Is the help text empty or all whitespace? */

if ($2[strspn($2, " \f\n\r\t\v")] == '\0')

zconf_error("'%s' defined with blank help text",

current_entry->sym->name ?: "<choice>");

current_entry->help = $2;

};

/* depends option */

depends: T_DEPENDS T_ON expr if_expr T_EOL

{

menu_add_dep($3, $4);

printd(DEBUG_PARSE, "%s:%d:depends on\n", cur_filename, cur_lineno);

};

/* visibility option */

visible: T_VISIBLE if_expr T_EOL

{

menu_add_visibility($2);

};

/* prompt statement */

prompt_stmt_opt:

/* empty */

| T_WORD_QUOTE if_expr

{

menu_add_prompt(P_PROMPT, $1, $2);

};

end: T_ENDMENU T_EOL { $$ = "menu"; }

| T_ENDCHOICE T_EOL { $$ = "choice"; }

| T_ENDIF T_EOL { $$ = "if"; }

;

if_expr: /* empty */ { $$ = NULL; }

| T_IF expr { $$ = $2; }

;

expr: symbol { $$ = expr_alloc_symbol($1); }

| symbol T_LESS symbol { $$ = expr_alloc_comp(E_LTH, $1, $3); }

| symbol T_LESS_EQUAL symbol { $$ = expr_alloc_comp(E_LEQ, $1, $3); }

| symbol T_GREATER symbol { $$ = expr_alloc_comp(E_GTH, $1, $3); }

| symbol T_GREATER_EQUAL symbol { $$ = expr_alloc_comp(E_GEQ, $1, $3); }

| symbol T_EQUAL symbol { $$ = expr_alloc_comp(E_EQUAL, $1, $3); }

| symbol T_UNEQUAL symbol { $$ = expr_alloc_comp(E_UNEQUAL, $1, $3); }

| T_OPEN_PAREN expr T_CLOSE_PAREN { $$ = $2; }

| T_NOT expr { $$ = expr_alloc_one(E_NOT, $2); }

| expr T_OR expr { $$ = expr_alloc_two(E_OR, $1, $3); }

| expr T_AND expr { $$ = expr_alloc_two(E_AND, $1, $3); }

;

/* For symbol definitions, selects, etc., where quotes are not accepted */

nonconst_symbol: T_WORD { $$ = sym_lookup($1, 0); free($1); };

symbol: nonconst_symbol

| T_WORD_QUOTE { $$ = sym_lookup($1, SYMBOL_CONST); free($1); }

;

/* assignment statement */

assignment_stmt: T_WORD assign_op assign_val T_EOL { variable_add($1, $3, $2); free($1); free($3); }

assign_op:

T_EQUAL { $$ = VAR_RECURSIVE; }

| T_COLON_EQUAL { $$ = VAR_SIMPLE; }

| T_PLUS_EQUAL { $$ = VAR_APPEND; }

;

assign_val:

/* empty */ { $$ = xstrdup(""); };

| T_ASSIGN_VAL

;

%%

/**

* transitional_check_sanity - check transitional symbols have no other

* properties

*

* @menu: menu of the potentially transitional symbol

*

* Return: -1 if an error is found, 0 otherwise.

*/

static int transitional_check_sanity(const struct menu *menu)

{

struct property *prop;

if (!menu->sym || !(menu->sym->flags & SYMBOL_TRANS))

return 0;

/* Check for depends and visible conditions. */

if ((menu->dep && !expr_is_yes(menu->dep)) ||

(menu->visibility && !expr_is_yes(menu->visibility))) {

fprintf(stderr, "%s:%d: error: %s",

menu->filename, menu->lineno,

"transitional symbols can only have help sections\n");

return -1;

}

/* Check for any property other than "help". */

for (prop = menu->sym->prop; prop; prop = prop->next) {

if (prop->type != P_COMMENT) {

fprintf(stderr, "%s:%d: error: %s",

prop->filename, prop->lineno,

"transitional symbols can only have help sections\n");

return -1;

}

}

return 0;

}

/**

* choice_check_sanity - check sanity of a choice member

*

* @menu: menu of the choice member

*

* Return: -1 if an error is found, 0 otherwise.

*/

static int choice_check_sanity(const struct menu *menu)

{

struct property *prop;

int ret = 0;

for (prop = menu->sym->prop; prop; prop = prop->next) {

if (prop->type == P_DEFAULT) {

fprintf(stderr, "%s:%d: error: %s",

prop->filename, prop->lineno,

"defaults for choice values not supported\n");

ret = -1;

}

if (prop->menu != menu && prop->type == P_PROMPT) {

fprintf(stderr, "%s:%d: error: %s",

prop->filename, prop->lineno,

"choice value must not have a prompt in another entry\n");

ret = -1;

}

}

return ret;

}

void conf_parse(const char *name)

{

struct menu *menu;

autoconf_cmd = str_new();

str_printf(&autoconf_cmd, "\ndeps_config := \\\n");

zconf_initscan(name);

_menu_init();

if (getenv("ZCONF_DEBUG"))

yydebug = 1;

yyparse();

str_printf(&autoconf_cmd,

"\n"

"$(autoconfig): $(deps_config)\n"

"$(deps_config): ;\n");

env_write_dep(&autoconf_cmd);

/* Variables are expanded in the parse phase. We can free them here. */

variable_all_del();

if (yynerrs)

exit(1);

if (!modules_sym)

modules_sym = &symbol_no;

if (!menu_has_prompt(&rootmenu)) {

current_entry = &rootmenu;

menu_add_prompt(P_MENU, "Main menu", NULL);

}

menu_finalize();

menu_for_each_entry(menu) {

struct menu *child;

if (menu->sym && sym_check_deps(menu->sym))

yynerrs++;

if (transitional_check_sanity(menu))

yynerrs++;

if (menu->sym && sym_is_choice(menu->sym)) {

menu_for_each_sub_entry(child, menu)

if (child->sym && choice_check_sanity(child))

yynerrs++;

}

}

if (yynerrs)

exit(1);

conf_set_changed(true);

}

static bool zconf_endtoken(const char *tokenname,

const char *expected_tokenname)

{

if (strcmp(tokenname, expected_tokenname)) {

zconf_error("unexpected '%s' within %s block",

tokenname, expected_tokenname);

yynerrs++;

return false;

}

if (strcmp(current_menu->filename, cur_filename)) {

zconf_error("'%s' in different file than '%s'",

tokenname, expected_tokenname);

fprintf(stderr, "%s:%d: location of the '%s'\n",

current_menu->filename, current_menu->lineno,

expected_tokenname);

yynerrs++;

return false;

}

return true;

}

static void zconf_error(const char *err, ...)

{

va_list ap;

yynerrs++;

fprintf(stderr, "%s:%d: ", cur_filename, cur_lineno);

va_start(ap, err);

vfprintf(stderr, err, ap);

va_end(ap);

fprintf(stderr, "\n");

}

static void yyerror(const char *err)

{

fprintf(stderr, "%s:%d: %s\n", cur_filename, cur_lineno, err);

}

static void print_quoted_string(FILE *out, const char *str)

{

const char *p;

int len;

putc('"', out);

while ((p = strchr(str, '"'))) {

len = p - str;

if (len)

fprintf(out, "%.*s", len, str);

fputs("\\\"", out);

str = p + 1;

}

fputs(str, out);

putc('"', out);

}

static void print_symbol(FILE *out, const struct menu *menu)

{

struct symbol *sym = menu->sym;

struct property *prop;

if (sym_is_choice(sym))

fprintf(out, "\nchoice\n");

else

fprintf(out, "\nconfig %s\n", sym->name);

switch (sym->type) {

case S_BOOLEAN:

fputs(" bool\n", out);

break;

case S_TRISTATE:

fputs(" tristate\n", out);

break;

case S_STRING:

fputs(" string\n", out);

break;

case S_INT:

fputs(" integer\n", out);

break;

case S_HEX:

fputs(" hex\n", out);

break;

default:

fputs(" ???\n", out);

break;

}

for (prop = sym->prop; prop; prop = prop->next) {

if (prop->menu != menu)

continue;

switch (prop->type) {

case P_PROMPT:

fputs(" prompt ", out);

print_quoted_string(out, prop->text);

if (!expr_is_yes(prop->visible.expr)) {

fputs(" if ", out);

expr_fprint(prop->visible.expr, out);

}

fputc('\n', out);

break;

case P_DEFAULT:

fputs( " default ", out);

expr_fprint(prop->expr, out);

if (!expr_is_yes(prop->visible.expr)) {

fputs(" if ", out);

expr_fprint(prop->visible.expr, out);

}

fputc('\n', out);

break;

case P_SELECT:

fputs( " select ", out);

expr_fprint(prop->expr, out);

fputc('\n', out);

break;

case P_IMPLY:

fputs( " imply ", out);

expr_fprint(prop->expr, out);

fputc('\n', out);

break;

case P_RANGE:

fputs( " range ", out);

expr_fprint(prop->expr, out);

fputc('\n', out);

break;

case P_MENU:

fputs( " menu ", out);

print_quoted_string(out, prop->text);

fputc('\n', out);

break;

default:

fprintf(out, " unknown prop %d!\n", prop->type);

break;

}

}

if (menu->help) {

int len = strlen(menu->help);

while (menu->help[--len] == '\n')

menu->help[len] = 0;

fprintf(out, " help\n%s\n", menu->help);

}

}

void zconfdump(FILE *out)

{

struct property *prop;

struct symbol *sym;

struct menu *menu;

menu = rootmenu.list;

while (menu) {

if ((sym = menu->sym))

print_symbol(out, menu);

else if ((prop = menu->prompt)) {

switch (prop->type) {

case P_COMMENT:

fputs("\ncomment ", out);

print_quoted_string(out, prop->text);

fputs("\n", out);

break;

case P_MENU:

fputs("\nmenu ", out);

print_quoted_string(out, prop->text);

fputs("\n", out);

break;

default:

;

}

if (!expr_is_yes(prop->visible.expr)) {

fputs(" depends ", out);

expr_fprint(prop->visible.expr, out);

fputc('\n', out);

}

}

if (menu->list)

menu = menu->list;

else if (menu->next)

menu = menu->next;

else while ((menu = menu->parent)) {

if (menu->prompt && menu->prompt->type == P_MENU)

fputs("\nendmenu\n", out);

if (menu->next) {

menu = menu->next;

break;

}

}

}

}