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: #ifndef EXPR_H
yann@1: #define EXPR_H
yann@1: 
yann@1: #ifdef __cplusplus
yann@1: extern "C" {
yann@1: #endif
yann@1: 
yann@1: #include <stdio.h>
yann@1: #ifndef __cplusplus
yann@1: #include <stdbool.h>
yann@1: #endif
yann@1: 
yann@1: struct file {
yann@1: 	struct file *next;
yann@1: 	struct file *parent;
yann@1: 	char *name;
yann@1: 	int lineno;
yann@1: 	int flags;
yann@1: };
yann@1: 
yann@1: #define FILE_BUSY		0x0001
yann@1: #define FILE_SCANNED		0x0002
yann@1: 
yann@1: typedef enum tristate {
yann@1: 	no, mod, yes
yann@1: } tristate;
yann@1: 
yann@1: enum expr_type {
yann@943: 	E_NONE, E_OR, E_AND, E_NOT, E_EQUAL, E_UNEQUAL, E_LIST, E_SYMBOL, E_RANGE
yann@1: };
yann@1: 
yann@1: union expr_data {
yann@1: 	struct expr *expr;
yann@1: 	struct symbol *sym;
yann@1: };
yann@1: 
yann@1: struct expr {
yann@1: 	enum expr_type type;
yann@1: 	union expr_data left, right;
yann@1: };
yann@1: 
yann@943: #define EXPR_OR(dep1, dep2)	(((dep1)>(dep2))?(dep1):(dep2))
yann@943: #define EXPR_AND(dep1, dep2)	(((dep1)<(dep2))?(dep1):(dep2))
yann@943: #define EXPR_NOT(dep)		(2-(dep))
yann@943: 
yann@943: #define expr_list_for_each_sym(l, e, s) \
yann@943: 	for (e = (l); e && (s = e->right.sym); e = e->left.expr)
yann@1: 
yann@1: struct expr_value {
yann@1: 	struct expr *expr;
yann@1: 	tristate tri;
yann@1: };
yann@1: 
yann@1: struct symbol_value {
yann@1: 	void *val;
yann@1: 	tristate tri;
yann@1: };
yann@1: 
yann@1: enum symbol_type {
yann@1: 	S_UNKNOWN, S_BOOLEAN, S_TRISTATE, S_INT, S_HEX, S_STRING, S_OTHER
yann@1: };
yann@1: 
yann@1234: /* enum values are used as index to symbol.def[] */
yann@1: enum {
yann@1: 	S_DEF_USER,		/* main user value */
yann@1234: 	S_DEF_AUTO,		/* values read from auto.conf */
yann@1234: 	S_DEF_DEF3,		/* Reserved for UI usage */
yann@1234: 	S_DEF_DEF4,		/* Reserved for UI usage */
yann@1234: 	S_DEF_COUNT
yann@1: };
yann@1: 
yann@1: struct symbol {
yann@1: 	struct symbol *next;
yann@1: 	char *name;
yann@1: 	enum symbol_type type;
yann@1: 	struct symbol_value curr;
yann@1234: 	struct symbol_value def[S_DEF_COUNT];
yann@1: 	tristate visible;
yann@1: 	int flags;
yann@1: 	struct property *prop;
yann@1: 	struct expr_value rev_dep;
yann@1: };
yann@1: 
yann@1: #define for_all_symbols(i, sym) for (i = 0; i < 257; i++) for (sym = symbol_hash[i]; sym; sym = sym->next) if (sym->type != S_OTHER)
yann@1: 
yann@1235: #define SYMBOL_CONST      0x0001  /* symbol is const */
yann@1235: #define SYMBOL_CHECK      0x0008  /* used during dependency checking */
yann@1235: #define SYMBOL_CHOICE     0x0010  /* start of a choice block (null name) */
yann@1235: #define SYMBOL_CHOICEVAL  0x0020  /* used as a value in a choice block */
yann@1235: #define SYMBOL_VALID      0x0080  /* set when symbol.curr is calculated */
yann@1235: #define SYMBOL_OPTIONAL   0x0100  /* choice is optional - values can be 'n' */
yann@1235: #define SYMBOL_WRITE      0x0200  /* ? */
yann@1235: #define SYMBOL_CHANGED    0x0400  /* ? */
yann@1235: #define SYMBOL_AUTO       0x1000  /* value from environment variable */
yann@1235: #define SYMBOL_CHECKED    0x2000  /* used during dependency checking */
yann@1235: #define SYMBOL_WARNED     0x8000  /* warning has been issued */
yann@1235: 
yann@1235: /* Set when symbol.def[] is used */
yann@1235: #define SYMBOL_DEF        0x10000  /* First bit of SYMBOL_DEF */
yann@1235: #define SYMBOL_DEF_USER   0x10000  /* symbol.def[S_DEF_USER] is valid */
yann@1235: #define SYMBOL_DEF_AUTO   0x20000  /* symbol.def[S_DEF_AUTO] is valid */
yann@1235: #define SYMBOL_DEF3       0x40000  /* symbol.def[S_DEF_3] is valid */
yann@1235: #define SYMBOL_DEF4       0x80000  /* symbol.def[S_DEF_4] is valid */
yann@1: 
yann@1: #define SYMBOL_MAXLENGTH	256
yann@1: #define SYMBOL_HASHSIZE		257
yann@1: #define SYMBOL_HASHMASK		0xff
yann@1: 
yann@1236: /* A property represent the config options that can be associated
yann@1236:  * with a config "symbol".
yann@1236:  * Sample:
yann@1236:  * config FOO
yann@1236:  *         default y
yann@1236:  *         prompt "foo prompt"
yann@1236:  *         select BAR
yann@1236:  * config BAZ
yann@1236:  *         int "BAZ Value"
yann@1236:  *         range 1..255
yann@1236:  */
yann@1: enum prop_type {
yann@1236: 	P_UNKNOWN,
yann@1236: 	P_PROMPT,   /* prompt "foo prompt" or "BAZ Value" */
yann@1236: 	P_COMMENT,  /* text associated with a comment */
yann@1236: 	P_MENU,     /* prompt associated with a menuconfig option */
yann@1236: 	P_DEFAULT,  /* default y */
yann@1236: 	P_CHOICE,   /* choice value */
yann@1236: 	P_SELECT,   /* select BAR */
yann@1236: 	P_RANGE,    /* range 7..100 (for a symbol) */
yann@1236: 	P_ENV,      /* value from environment variable */
yann@1: };
yann@1: 
yann@1: struct property {
yann@1236: 	struct property *next;     /* next property - null if last */
yann@1236: 	struct symbol *sym;        /* the symbol for which the property is associated */
yann@1236: 	enum prop_type type;       /* type of property */
yann@1236: 	const char *text;          /* the prompt value - P_PROMPT, P_MENU, P_COMMENT */
yann@1: 	struct expr_value visible;
yann@1236: 	struct expr *expr;         /* the optional conditional part of the property */
yann@1236: 	struct menu *menu;         /* the menu the property are associated with
yann@1236: 	                            * valid for: P_SELECT, P_RANGE, P_CHOICE,
yann@1236: 	                            * P_PROMPT, P_DEFAULT, P_MENU, P_COMMENT */
yann@1236: 	struct file *file;         /* what file was this property defined */
yann@1236: 	int lineno;                /* what lineno was this property defined */
yann@1: };
yann@1: 
yann@1: #define for_all_properties(sym, st, tok) \
yann@1: 	for (st = sym->prop; st; st = st->next) \
yann@1: 		if (st->type == (tok))
yann@1: #define for_all_defaults(sym, st) for_all_properties(sym, st, P_DEFAULT)
yann@1: #define for_all_choices(sym, st) for_all_properties(sym, st, P_CHOICE)
yann@1: #define for_all_prompts(sym, st) \
yann@1: 	for (st = sym->prop; st; st = st->next) \
yann@1: 		if (st->text)
yann@1: 
yann@1: struct menu {
yann@1: 	struct menu *next;
yann@1: 	struct menu *parent;
yann@1: 	struct menu *list;
yann@1: 	struct symbol *sym;
yann@1: 	struct property *prompt;
yann@1: 	struct expr *dep;
yann@1: 	unsigned int flags;
yann@943: 	char *help;
yann@1: 	struct file *file;
yann@1: 	int lineno;
yann@1: 	void *data;
yann@1: };
yann@1: 
yann@1: #define MENU_CHANGED		0x0001
yann@1: #define MENU_ROOT		0x0002
yann@1: 
yann@1: #ifndef SWIG
yann@1: 
yann@1: extern struct file *file_list;
yann@1: extern struct file *current_file;
yann@1: struct file *lookup_file(const char *name);
yann@1: 
yann@1: extern struct symbol symbol_yes, symbol_no, symbol_mod;
yann@1: extern struct symbol *modules_sym;
yann@1: extern struct symbol *sym_defconfig_list;
yann@1: extern int cdebug;
yann@1: struct expr *expr_alloc_symbol(struct symbol *sym);
yann@1: struct expr *expr_alloc_one(enum expr_type type, struct expr *ce);
yann@1: struct expr *expr_alloc_two(enum expr_type type, struct expr *e1, struct expr *e2);
yann@1: struct expr *expr_alloc_comp(enum expr_type type, struct symbol *s1, struct symbol *s2);
yann@1: struct expr *expr_alloc_and(struct expr *e1, struct expr *e2);
yann@1: struct expr *expr_alloc_or(struct expr *e1, struct expr *e2);
yann@1: struct expr *expr_copy(struct expr *org);
yann@1: void expr_free(struct expr *e);
yann@1: int expr_eq(struct expr *e1, struct expr *e2);
yann@1: void expr_eliminate_eq(struct expr **ep1, struct expr **ep2);
yann@1: tristate expr_calc_value(struct expr *e);
yann@1: struct expr *expr_eliminate_yn(struct expr *e);
yann@1: struct expr *expr_trans_bool(struct expr *e);
yann@1: struct expr *expr_eliminate_dups(struct expr *e);
yann@1: struct expr *expr_transform(struct expr *e);
yann@1: int expr_contains_symbol(struct expr *dep, struct symbol *sym);
yann@1: bool expr_depends_symbol(struct expr *dep, struct symbol *sym);
yann@1: struct expr *expr_extract_eq_and(struct expr **ep1, struct expr **ep2);
yann@1: struct expr *expr_extract_eq_or(struct expr **ep1, struct expr **ep2);
yann@1: void expr_extract_eq(enum expr_type type, struct expr **ep, struct expr **ep1, struct expr **ep2);
yann@1: struct expr *expr_trans_compare(struct expr *e, enum expr_type type, struct symbol *sym);
yann@1: 
yann@1: void expr_fprint(struct expr *e, FILE *out);
yann@1: struct gstr; /* forward */
yann@1: void expr_gstr_print(struct expr *e, struct gstr *gs);
yann@1: 
yann@1: static inline int expr_is_yes(struct expr *e)
yann@1: {
yann@1: 	return !e || (e->type == E_SYMBOL && e->left.sym == &symbol_yes);
yann@1: }
yann@1: 
yann@1: static inline int expr_is_no(struct expr *e)
yann@1: {
yann@1: 	return e && (e->type == E_SYMBOL && e->left.sym == &symbol_no);
yann@1: }
yann@1: #endif
yann@1: 
yann@1: #ifdef __cplusplus
yann@1: }
yann@1: #endif
yann@1: 
yann@1: #endif /* EXPR_H */