kconfig/expr.h
author "Yann E. MORIN" <yann.morin.1998@free.fr>
Thu Jan 10 00:27:13 2013 +0100 (2013-01-10)
changeset 3159 fb71cad4b085
parent 1236 aba08231fe27
permissions -rw-r--r--
arch/arm: OABI is no more, switch to only EABI

Well, leave the prompt as an OBSOLETE thing, scheduled to
be removed soon.

As an indication OABI lives its last days, gcc-4.8 will no
longer recognise non-EABI targets.

Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
     1 /*
     2  * Copyright (C) 2002 Roman Zippel <zippel@linux-m68k.org>
     3  * Released under the terms of the GNU GPL v2.0.
     4  */
     5 
     6 #ifndef EXPR_H
     7 #define EXPR_H
     8 
     9 #ifdef __cplusplus
    10 extern "C" {
    11 #endif
    12 
    13 #include <stdio.h>
    14 #ifndef __cplusplus
    15 #include <stdbool.h>
    16 #endif
    17 
    18 struct file {
    19 	struct file *next;
    20 	struct file *parent;
    21 	const char *name;
    22 	int lineno;
    23 };
    24 
    25 typedef enum tristate {
    26 	no, mod, yes
    27 } tristate;
    28 
    29 enum expr_type {
    30 	E_NONE, E_OR, E_AND, E_NOT, E_EQUAL, E_UNEQUAL, E_LIST, E_SYMBOL, E_RANGE
    31 };
    32 
    33 union expr_data {
    34 	struct expr *expr;
    35 	struct symbol *sym;
    36 };
    37 
    38 struct expr {
    39 	enum expr_type type;
    40 	union expr_data left, right;
    41 };
    42 
    43 #define EXPR_OR(dep1, dep2)	(((dep1)>(dep2))?(dep1):(dep2))
    44 #define EXPR_AND(dep1, dep2)	(((dep1)<(dep2))?(dep1):(dep2))
    45 #define EXPR_NOT(dep)		(2-(dep))
    46 
    47 #define expr_list_for_each_sym(l, e, s) \
    48 	for (e = (l); e && (s = e->right.sym); e = e->left.expr)
    49 
    50 struct expr_value {
    51 	struct expr *expr;
    52 	tristate tri;
    53 };
    54 
    55 struct symbol_value {
    56 	void *val;
    57 	tristate tri;
    58 };
    59 
    60 enum symbol_type {
    61 	S_UNKNOWN, S_BOOLEAN, S_TRISTATE, S_INT, S_HEX, S_STRING, S_OTHER
    62 };
    63 
    64 /* enum values are used as index to symbol.def[] */
    65 enum {
    66 	S_DEF_USER,		/* main user value */
    67 	S_DEF_AUTO,		/* values read from auto.conf */
    68 	S_DEF_DEF3,		/* Reserved for UI usage */
    69 	S_DEF_DEF4,		/* Reserved for UI usage */
    70 	S_DEF_COUNT
    71 };
    72 
    73 struct symbol {
    74 	struct symbol *next;
    75 	char *name;
    76 	enum symbol_type type;
    77 	struct symbol_value curr;
    78 	struct symbol_value def[S_DEF_COUNT];
    79 	tristate visible;
    80 	int flags;
    81 	struct property *prop;
    82 	struct expr_value dir_dep;
    83 	struct expr_value rev_dep;
    84 };
    85 
    86 #define for_all_symbols(i, sym) for (i = 0; i < SYMBOL_HASHSIZE; i++) for (sym = symbol_hash[i]; sym; sym = sym->next) if (sym->type != S_OTHER)
    87 
    88 #define SYMBOL_CONST      0x0001  /* symbol is const */
    89 #define SYMBOL_CHECK      0x0008  /* used during dependency checking */
    90 #define SYMBOL_CHOICE     0x0010  /* start of a choice block (null name) */
    91 #define SYMBOL_CHOICEVAL  0x0020  /* used as a value in a choice block */
    92 #define SYMBOL_VALID      0x0080  /* set when symbol.curr is calculated */
    93 #define SYMBOL_OPTIONAL   0x0100  /* choice is optional - values can be 'n' */
    94 #define SYMBOL_WRITE      0x0200  /* ? */
    95 #define SYMBOL_CHANGED    0x0400  /* ? */
    96 #define SYMBOL_AUTO       0x1000  /* value from environment variable */
    97 #define SYMBOL_CHECKED    0x2000  /* used during dependency checking */
    98 #define SYMBOL_WARNED     0x8000  /* warning has been issued */
    99 
   100 /* Set when symbol.def[] is used */
   101 #define SYMBOL_DEF        0x10000  /* First bit of SYMBOL_DEF */
   102 #define SYMBOL_DEF_USER   0x10000  /* symbol.def[S_DEF_USER] is valid */
   103 #define SYMBOL_DEF_AUTO   0x20000  /* symbol.def[S_DEF_AUTO] is valid */
   104 #define SYMBOL_DEF3       0x40000  /* symbol.def[S_DEF_3] is valid */
   105 #define SYMBOL_DEF4       0x80000  /* symbol.def[S_DEF_4] is valid */
   106 
   107 #define SYMBOL_MAXLENGTH	256
   108 #define SYMBOL_HASHSIZE		9973
   109 
   110 /* A property represent the config options that can be associated
   111  * with a config "symbol".
   112  * Sample:
   113  * config FOO
   114  *         default y
   115  *         prompt "foo prompt"
   116  *         select BAR
   117  * config BAZ
   118  *         int "BAZ Value"
   119  *         range 1..255
   120  */
   121 enum prop_type {
   122 	P_UNKNOWN,
   123 	P_PROMPT,   /* prompt "foo prompt" or "BAZ Value" */
   124 	P_COMMENT,  /* text associated with a comment */
   125 	P_MENU,     /* prompt associated with a menuconfig option */
   126 	P_DEFAULT,  /* default y */
   127 	P_CHOICE,   /* choice value */
   128 	P_SELECT,   /* select BAR */
   129 	P_RANGE,    /* range 7..100 (for a symbol) */
   130 	P_ENV,      /* value from environment variable */
   131 	P_SYMBOL,   /* where a symbol is defined */
   132 };
   133 
   134 struct property {
   135 	struct property *next;     /* next property - null if last */
   136 	struct symbol *sym;        /* the symbol for which the property is associated */
   137 	enum prop_type type;       /* type of property */
   138 	const char *text;          /* the prompt value - P_PROMPT, P_MENU, P_COMMENT */
   139 	struct expr_value visible;
   140 	struct expr *expr;         /* the optional conditional part of the property */
   141 	struct menu *menu;         /* the menu the property are associated with
   142 	                            * valid for: P_SELECT, P_RANGE, P_CHOICE,
   143 	                            * P_PROMPT, P_DEFAULT, P_MENU, P_COMMENT */
   144 	struct file *file;         /* what file was this property defined */
   145 	int lineno;                /* what lineno was this property defined */
   146 };
   147 
   148 #define for_all_properties(sym, st, tok) \
   149 	for (st = sym->prop; st; st = st->next) \
   150 		if (st->type == (tok))
   151 #define for_all_defaults(sym, st) for_all_properties(sym, st, P_DEFAULT)
   152 #define for_all_choices(sym, st) for_all_properties(sym, st, P_CHOICE)
   153 #define for_all_prompts(sym, st) \
   154 	for (st = sym->prop; st; st = st->next) \
   155 		if (st->text)
   156 
   157 struct menu {
   158 	struct menu *next;
   159 	struct menu *parent;
   160 	struct menu *list;
   161 	struct symbol *sym;
   162 	struct property *prompt;
   163 	struct expr *visibility;
   164 	struct expr *dep;
   165 	unsigned int flags;
   166 	char *help;
   167 	struct file *file;
   168 	int lineno;
   169 	void *data;
   170 };
   171 
   172 #define MENU_CHANGED		0x0001
   173 #define MENU_ROOT		0x0002
   174 
   175 #ifndef SWIG
   176 
   177 extern struct file *file_list;
   178 extern struct file *current_file;
   179 struct file *lookup_file(const char *name);
   180 
   181 extern struct symbol symbol_yes, symbol_no, symbol_mod;
   182 extern struct symbol *modules_sym;
   183 extern struct symbol *sym_defconfig_list;
   184 extern int cdebug;
   185 struct expr *expr_alloc_symbol(struct symbol *sym);
   186 struct expr *expr_alloc_one(enum expr_type type, struct expr *ce);
   187 struct expr *expr_alloc_two(enum expr_type type, struct expr *e1, struct expr *e2);
   188 struct expr *expr_alloc_comp(enum expr_type type, struct symbol *s1, struct symbol *s2);
   189 struct expr *expr_alloc_and(struct expr *e1, struct expr *e2);
   190 struct expr *expr_alloc_or(struct expr *e1, struct expr *e2);
   191 struct expr *expr_copy(const struct expr *org);
   192 void expr_free(struct expr *e);
   193 int expr_eq(struct expr *e1, struct expr *e2);
   194 void expr_eliminate_eq(struct expr **ep1, struct expr **ep2);
   195 tristate expr_calc_value(struct expr *e);
   196 struct expr *expr_eliminate_yn(struct expr *e);
   197 struct expr *expr_trans_bool(struct expr *e);
   198 struct expr *expr_eliminate_dups(struct expr *e);
   199 struct expr *expr_transform(struct expr *e);
   200 int expr_contains_symbol(struct expr *dep, struct symbol *sym);
   201 bool expr_depends_symbol(struct expr *dep, struct symbol *sym);
   202 struct expr *expr_extract_eq_and(struct expr **ep1, struct expr **ep2);
   203 struct expr *expr_extract_eq_or(struct expr **ep1, struct expr **ep2);
   204 void expr_extract_eq(enum expr_type type, struct expr **ep, struct expr **ep1, struct expr **ep2);
   205 struct expr *expr_trans_compare(struct expr *e, enum expr_type type, struct symbol *sym);
   206 struct expr *expr_simplify_unmet_dep(struct expr *e1, struct expr *e2);
   207 
   208 void expr_fprint(struct expr *e, FILE *out);
   209 struct gstr; /* forward */
   210 void expr_gstr_print(struct expr *e, struct gstr *gs);
   211 
   212 static inline int expr_is_yes(struct expr *e)
   213 {
   214 	return !e || (e->type == E_SYMBOL && e->left.sym == &symbol_yes);
   215 }
   216 
   217 static inline int expr_is_no(struct expr *e)
   218 {
   219 	return e && (e->type == E_SYMBOL && e->left.sym == &symbol_no);
   220 }
   221 #endif
   222 
   223 #ifdef __cplusplus
   224 }
   225 #endif
   226 
   227 #endif /* EXPR_H */