/* 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 "lkc.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 zconfprint(const char *err, ...);static void zconf_error(const char *err, ...);static bool zconf_endtoken(const char *tokenname,			   const char *expected_tokenname); struct symbol *symbol_hash[SYMBOL_HASHSIZE]; static struct menu *current_menu, *current_entry; %} %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_ALLNOCONFIG_Y%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_DEFCONFIG_LIST%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_OPTION%token T_OPTIONAL%token T_PLUS_EQUAL%token T_PROMPT%token T_RANGE%token T_SELECT%token T_SOURCE%token T_STRING%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 <string> prompt%type <symbol> nonconst_symbol%type <symbol> symbol%type <type> type logic_type default%type <expr> expr%type <expr> if_expr%type <string> end%type <menu> if_entry menu_entry choice_entry%type <string> word_opt assign_val%type <flavor> assign_op %destructor {	fprintf(stderr, "%s:%d: missing end statement for this entry\n",		$$->file->name, $$->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 prompt T_EOL{	menu_add_prompt(P_MENU, $2, NULL);}; stmt_list:	  /* empty */	| stmt_list common_stmt	| stmt_list choice_stmt	| stmt_list menu_stmt	| stmt_list T_WORD error T_EOL	{ zconf_error("unknown statement \"%s\"", $2); }	| stmt_list error T_EOL		{ zconf_error("invalid statement"); }; common_stmt:	  if_stmt	| comment_stmt	| config_stmt	| menuconfig_stmt	| source_stmt	| assignment_stmt; /* config/menuconfig entry */ config_entry_start: T_CONFIG nonconst_symbol T_EOL{	$2->flags |= SYMBOL_OPTIONAL;	menu_add_entry($2);	printd(DEBUG_PARSE, "%s:%d:config %s\n", zconf_curname(), zconf_lineno(), $2->name);}; config_stmt: config_entry_start config_option_list{	printd(DEBUG_PARSE, "%s:%d:endconfig\n", zconf_curname(), zconf_lineno());}; menuconfig_entry_start: T_MENUCONFIG nonconst_symbol T_EOL{	$2->flags |= SYMBOL_OPTIONAL;	menu_add_entry($2);	printd(DEBUG_PARSE, "%s:%d:menuconfig %s\n", zconf_curname(), zconf_lineno(), $2->name);}; menuconfig_stmt: menuconfig_entry_start config_option_list{	if (current_entry->prompt)		current_entry->prompt->type = P_MENU;	else		zconfprint("warning: menuconfig statement without prompt");	printd(DEBUG_PARSE, "%s:%d:endconfig\n", zconf_curname(), zconf_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",		zconf_curname(), zconf_lineno(),		$1);}; config_option: T_PROMPT prompt if_expr T_EOL{	menu_add_prompt(P_PROMPT, $2, $3);	printd(DEBUG_PARSE, "%s:%d:prompt\n", zconf_curname(), zconf_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",		zconf_curname(), zconf_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", zconf_curname(), zconf_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", zconf_curname(), zconf_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", zconf_curname(), zconf_lineno());}; config_option: T_OPTION T_MODULES T_EOL{	menu_add_option_modules();}; config_option: T_OPTION T_DEFCONFIG_LIST T_EOL{	menu_add_option_defconfig_list();}; config_option: T_OPTION T_ALLNOCONFIG_Y T_EOL{	menu_add_option_allnoconfig_y();}; /* choice entry */ choice: T_CHOICE word_opt T_EOL{	struct symbol *sym = sym_lookup($2, SYMBOL_CHOICE);	sym->flags |= SYMBOL_NO_WRITE;	menu_add_entry(sym);	menu_add_expr(P_CHOICE, NULL, NULL);	free($2);	printd(DEBUG_PARSE, "%s:%d:choice\n", zconf_curname(), zconf_lineno());}; choice_entry: choice choice_option_list{	$$ = menu_add_menu();}; choice_end: end{	if (zconf_endtoken($1, "choice")) {		menu_end_menu();		printd(DEBUG_PARSE, "%s:%d:endchoice\n", zconf_curname(), zconf_lineno());	}}; choice_stmt: choice_entry choice_block choice_end; choice_option_list:	  /* empty */	| choice_option_list choice_option	| choice_option_list depends	| choice_option_list help; choice_option: T_PROMPT prompt if_expr T_EOL{	menu_add_prompt(P_PROMPT, $2, $3);	printd(DEBUG_PARSE, "%s:%d:prompt\n", zconf_curname(), zconf_lineno());}; choice_option: logic_type prompt_stmt_opt T_EOL{	menu_set_type($1);	printd(DEBUG_PARSE, "%s:%d:type(%u)\n",	       zconf_curname(), zconf_lineno(), $1);}; choice_option: T_OPTIONAL T_EOL{	current_entry->sym->flags |= SYMBOL_OPTIONAL;	printd(DEBUG_PARSE, "%s:%d:optional\n", zconf_curname(), zconf_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",	       zconf_curname(), zconf_lineno());}; type:	  logic_type	| T_INT			{ $$ = S_INT; }	| T_HEX			{ $$ = S_HEX; }	| T_STRING		{ $$ = S_STRING; } logic_type:	  T_BOOL		{ $$ = S_BOOLEAN; }	| T_TRISTATE		{ $$ = S_TRISTATE; } default:	  T_DEFAULT		{ $$ = S_UNKNOWN; }	| T_DEF_BOOL		{ $$ = S_BOOLEAN; }	| T_DEF_TRISTATE	{ $$ = S_TRISTATE; } choice_block:	  /* empty */	| choice_block common_stmt; /* if entry */ if_entry: T_IF expr T_EOL{	printd(DEBUG_PARSE, "%s:%d:if\n", zconf_curname(), zconf_lineno());	menu_add_entry(NULL);	menu_add_dep($2);	$$ = menu_add_menu();}; if_end: end{	if (zconf_endtoken($1, "if")) {		menu_end_menu();		printd(DEBUG_PARSE, "%s:%d:endif\n", zconf_curname(), zconf_lineno());	}}; if_stmt: if_entry stmt_list if_end; /* menu entry */ menu: T_MENU prompt T_EOL{	menu_add_entry(NULL);	menu_add_prompt(P_MENU, $2, NULL);	printd(DEBUG_PARSE, "%s:%d:menu\n", zconf_curname(), zconf_lineno());}; menu_entry: menu menu_option_list{	$$ = menu_add_menu();}; menu_end: end{	if (zconf_endtoken($1, "menu")) {		menu_end_menu();		printd(DEBUG_PARSE, "%s:%d:endmenu\n", zconf_curname(), zconf_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 prompt T_EOL{	printd(DEBUG_PARSE, "%s:%d:source %s\n", zconf_curname(), zconf_lineno(), $2);	zconf_nextfile($2);	free($2);}; /* comment entry */ comment: T_COMMENT prompt T_EOL{	menu_add_entry(NULL);	menu_add_prompt(P_COMMENT, $2, NULL);	printd(DEBUG_PARSE, "%s:%d:comment\n", zconf_curname(), zconf_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", zconf_curname(), zconf_lineno());	zconf_starthelp();}; help: help_start T_HELPTEXT{	if (current_entry->help) {		free(current_entry->help);		zconfprint("warning: '%s' defined with more than one help text -- only the last one will be used",			   current_entry->sym->name ?: "<choice>");	} 	/* Is the help text empty or all whitespace? */	if ($2[strspn($2, " \f\n\r\t\v")] == '\0')		zconfprint("warning: '%s' defined with blank help text",			   current_entry->sym->name ?: "<choice>"); 	current_entry->help = $2;}; /* depends option */ depends: T_DEPENDS T_ON expr T_EOL{	menu_add_dep($3);	printd(DEBUG_PARSE, "%s:%d:depends on\n", zconf_curname(), zconf_lineno());}; /* visibility option */visible: T_VISIBLE if_expr T_EOL{	menu_add_visibility($2);}; /* prompt statement */ prompt_stmt_opt:	  /* empty */	| prompt if_expr{	menu_add_prompt(P_PROMPT, $1, $2);}; prompt:	  T_WORD	| T_WORD_QUOTE; 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); }; word_opt: /* empty */			{ $$ = NULL; }	| T_WORD /* assignment statement */ assignment_stmt:  T_WORD assign_op assign_val T_EOL	{ variable_add($1, $3, $2); free($1); free($3); } assign_op:	  T_EQUAL	{ $$ = VAR_RECURSIVE; }	| T_COLON_EQUAL	{ $$ = VAR_SIMPLE; }	| T_PLUS_EQUAL	{ $$ = VAR_APPEND; }; assign_val:	/* empty */		{ $$ = xstrdup(""); };	| T_ASSIGN_VAL; %% void conf_parse(const char *name){	struct symbol *sym;	int i; 	zconf_initscan(name); 	_menu_init(); 	if (getenv("ZCONF_DEBUG"))		yydebug = 1;

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