kconfig/expr.h
author "Yann E. MORIN" <yann.morin.1998@anciens.enib.fr>
Tue Jan 12 19:24:03 2010 +0100 (2010-01-12)
changeset 1761 88020b2c3246
parent 1235 1cb6cf834483
child 2448 a103abae1560
permissions -rw-r--r--
scripts/functions: change handling of nochdir

- 'nochdir' must be the first option
- have systematic pushd/popd, even if nochdir
     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 	char *name;
    22 	int lineno;
    23 	int flags;
    24 };
    25 
    26 #define FILE_BUSY		0x0001
    27 #define FILE_SCANNED		0x0002
    28 
    29 typedef enum tristate {
    30 	no, mod, yes
    31 } tristate;
    32 
    33 enum expr_type {
    34 	E_NONE, E_OR, E_AND, E_NOT, E_EQUAL, E_UNEQUAL, E_LIST, E_SYMBOL, E_RANGE
    35 };
    36 
    37 union expr_data {
    38 	struct expr *expr;
    39 	struct symbol *sym;
    40 };
    41 
    42 struct expr {
    43 	enum expr_type type;
    44 	union expr_data left, right;
    45 };
    46 
    47 #define EXPR_OR(dep1, dep2)	(((dep1)>(dep2))?(dep1):(dep2))
    48 #define EXPR_AND(dep1, dep2)	(((dep1)<(dep2))?(dep1):(dep2))
    49 #define EXPR_NOT(dep)		(2-(dep))
    50 
    51 #define expr_list_for_each_sym(l, e, s) \
    52 	for (e = (l); e && (s = e->right.sym); e = e->left.expr)
    53 
    54 struct expr_value {
    55 	struct expr *expr;
    56 	tristate tri;
    57 };
    58 
    59 struct symbol_value {
    60 	void *val;
    61 	tristate tri;
    62 };
    63 
    64 enum symbol_type {
    65 	S_UNKNOWN, S_BOOLEAN, S_TRISTATE, S_INT, S_HEX, S_STRING, S_OTHER
    66 };
    67 
    68 /* enum values are used as index to symbol.def[] */
    69 enum {
    70 	S_DEF_USER,		/* main user value */
    71 	S_DEF_AUTO,		/* values read from auto.conf */
    72 	S_DEF_DEF3,		/* Reserved for UI usage */
    73 	S_DEF_DEF4,		/* Reserved for UI usage */
    74 	S_DEF_COUNT
    75 };
    76 
    77 struct symbol {
    78 	struct symbol *next;
    79 	char *name;
    80 	enum symbol_type type;
    81 	struct symbol_value curr;
    82 	struct symbol_value def[S_DEF_COUNT];
    83 	tristate visible;
    84 	int flags;
    85 	struct property *prop;
    86 	struct expr_value rev_dep;
    87 };
    88 
    89 #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)
    90 
    91 #define SYMBOL_CONST      0x0001  /* symbol is const */
    92 #define SYMBOL_CHECK      0x0008  /* used during dependency checking */
    93 #define SYMBOL_CHOICE     0x0010  /* start of a choice block (null name) */
    94 #define SYMBOL_CHOICEVAL  0x0020  /* used as a value in a choice block */
    95 #define SYMBOL_VALID      0x0080  /* set when symbol.curr is calculated */
    96 #define SYMBOL_OPTIONAL   0x0100  /* choice is optional - values can be 'n' */
    97 #define SYMBOL_WRITE      0x0200  /* ? */
    98 #define SYMBOL_CHANGED    0x0400  /* ? */
    99 #define SYMBOL_AUTO       0x1000  /* value from environment variable */
   100 #define SYMBOL_CHECKED    0x2000  /* used during dependency checking */
   101 #define SYMBOL_WARNED     0x8000  /* warning has been issued */
   102 
   103 /* Set when symbol.def[] is used */
   104 #define SYMBOL_DEF        0x10000  /* First bit of SYMBOL_DEF */
   105 #define SYMBOL_DEF_USER   0x10000  /* symbol.def[S_DEF_USER] is valid */
   106 #define SYMBOL_DEF_AUTO   0x20000  /* symbol.def[S_DEF_AUTO] is valid */
   107 #define SYMBOL_DEF3       0x40000  /* symbol.def[S_DEF_3] is valid */
   108 #define SYMBOL_DEF4       0x80000  /* symbol.def[S_DEF_4] is valid */
   109 
   110 #define SYMBOL_MAXLENGTH	256
   111 #define SYMBOL_HASHSIZE		257
   112 #define SYMBOL_HASHMASK		0xff
   113 
   114 /* A property represent the config options that can be associated
   115  * with a config "symbol".
   116  * Sample:
   117  * config FOO
   118  *         default y
   119  *         prompt "foo prompt"
   120  *         select BAR
   121  * config BAZ
   122  *         int "BAZ Value"
   123  *         range 1..255
   124  */
   125 enum prop_type {
   126 	P_UNKNOWN,
   127 	P_PROMPT,   /* prompt "foo prompt" or "BAZ Value" */
   128 	P_COMMENT,  /* text associated with a comment */
   129 	P_MENU,     /* prompt associated with a menuconfig option */
   130 	P_DEFAULT,  /* default y */
   131 	P_CHOICE,   /* choice value */
   132 	P_SELECT,   /* select BAR */
   133 	P_RANGE,    /* range 7..100 (for a symbol) */
   134 	P_ENV,      /* value from environment variable */
   135 };
   136 
   137 struct property {
   138 	struct property *next;     /* next property - null if last */
   139 	struct symbol *sym;        /* the symbol for which the property is associated */
   140 	enum prop_type type;       /* type of property */
   141 	const char *text;          /* the prompt value - P_PROMPT, P_MENU, P_COMMENT */
   142 	struct expr_value visible;
   143 	struct expr *expr;         /* the optional conditional part of the property */
   144 	struct menu *menu;         /* the menu the property are associated with
   145 	                            * valid for: P_SELECT, P_RANGE, P_CHOICE,
   146 	                            * P_PROMPT, P_DEFAULT, P_MENU, P_COMMENT */
   147 	struct file *file;         /* what file was this property defined */
   148 	int lineno;                /* what lineno was this property defined */
   149 };
   150 
   151 #define for_all_properties(sym, st, tok) \
   152 	for (st = sym->prop; st; st = st->next) \
   153 		if (st->type == (tok))
   154 #define for_all_defaults(sym, st) for_all_properties(sym, st, P_DEFAULT)
   155 #define for_all_choices(sym, st) for_all_properties(sym, st, P_CHOICE)
   156 #define for_all_prompts(sym, st) \
   157 	for (st = sym->prop; st; st = st->next) \
   158 		if (st->text)
   159 
   160 struct menu {
   161 	struct menu *next;
   162 	struct menu *parent;
   163 	struct menu *list;
   164 	struct symbol *sym;
   165 	struct property *prompt;
   166 	struct expr *dep;
   167 	unsigned int flags;
   168 	char *help;
   169 	struct file *file;
   170 	int lineno;
   171 	void *data;
   172 };
   173 
   174 #define MENU_CHANGED		0x0001
   175 #define MENU_ROOT		0x0002
   176 
   177 #ifndef SWIG
   178 
   179 extern struct file *file_list;
   180 extern struct file *current_file;
   181 struct file *lookup_file(const char *name);
   182 
   183 extern struct symbol symbol_yes, symbol_no, symbol_mod;
   184 extern struct symbol *modules_sym;
   185 extern struct symbol *sym_defconfig_list;
   186 extern int cdebug;
   187 struct expr *expr_alloc_symbol(struct symbol *sym);
   188 struct expr *expr_alloc_one(enum expr_type type, struct expr *ce);
   189 struct expr *expr_alloc_two(enum expr_type type, struct expr *e1, struct expr *e2);
   190 struct expr *expr_alloc_comp(enum expr_type type, struct symbol *s1, struct symbol *s2);
   191 struct expr *expr_alloc_and(struct expr *e1, struct expr *e2);
   192 struct expr *expr_alloc_or(struct expr *e1, struct expr *e2);
   193 struct expr *expr_copy(struct expr *org);
   194 void expr_free(struct expr *e);
   195 int expr_eq(struct expr *e1, struct expr *e2);
   196 void expr_eliminate_eq(struct expr **ep1, struct expr **ep2);
   197 tristate expr_calc_value(struct expr *e);
   198 struct expr *expr_eliminate_yn(struct expr *e);
   199 struct expr *expr_trans_bool(struct expr *e);
   200 struct expr *expr_eliminate_dups(struct expr *e);
   201 struct expr *expr_transform(struct expr *e);
   202 int expr_contains_symbol(struct expr *dep, struct symbol *sym);
   203 bool expr_depends_symbol(struct expr *dep, struct symbol *sym);
   204 struct expr *expr_extract_eq_and(struct expr **ep1, struct expr **ep2);
   205 struct expr *expr_extract_eq_or(struct expr **ep1, struct expr **ep2);
   206 void expr_extract_eq(enum expr_type type, struct expr **ep, struct expr **ep1, struct expr **ep2);
   207 struct expr *expr_trans_compare(struct expr *e, enum expr_type type, struct symbol *sym);
   208 
   209 void expr_fprint(struct expr *e, FILE *out);
   210 struct gstr; /* forward */
   211 void expr_gstr_print(struct expr *e, struct gstr *gs);
   212 
   213 static inline int expr_is_yes(struct expr *e)
   214 {
   215 	return !e || (e->type == E_SYMBOL && e->left.sym == &symbol_yes);
   216 }
   217 
   218 static inline int expr_is_no(struct expr *e)
   219 {
   220 	return e && (e->type == E_SYMBOL && e->left.sym == &symbol_no);
   221 }
   222 #endif
   223 
   224 #ifdef __cplusplus
   225 }
   226 #endif
   227 
   228 #endif /* EXPR_H */