# expr.h

    00001 /*
    00002  * Copyright (C) 2002 Roman Zippel <zippel@linux-m68k.org>
    00003  * Released under the terms of the GNU GPL v2.0.
    00004  */
    00005
    00006 #ifndef EXPR_H
    00007 #define EXPR_H
    00008
    00009 #ifdef __cplusplus
    00010 extern "C" {
    00011 #endif
    00012
    00013 #include <stdio.h>
    00014 #ifndef __cplusplus
    00015 #include <stdbool.h>
    00016 #endif
    00017
    00018 struct file {
    00019         struct file *next;
    00020         struct file *parent;
    00021         char *name;
    00022         int lineno;
    00023         int flags;
    00024 };
    00025
    00026 #define FILE_BUSY               0x0001
    00027 #define FILE_SCANNED            0x0002
    00028 #define FILE_PRINTED            0x0004
    00029
    00030 typedef enum tristate {
    00031         no, mod, yes
    00032 } tristate;
    00033
    00034 enum expr_type {
    00035         E_NONE, E_OR, E_AND, E_NOT, E_EQUAL, E_UNEQUAL, E_CHOICE, E_SYMBOL, E_RANGE
    00036 };
    00037
    00038 union expr_data {
    00039         struct expr *expr;
    00040         struct symbol *sym;
    00041 };
    00042
    00043 struct expr {
    00044         enum expr_type type;
    00045         union expr_data left, right;
    00046 };
    00047
    00048 #define E_OR(dep1, dep2)        (((dep1)>(dep2))?(dep1):(dep2))
    00049 #define E_AND(dep1, dep2)       (((dep1)<(dep2))?(dep1):(dep2))
    00050 #define E_NOT(dep)              (2-(dep))
    00051
    00052 struct expr_value {
    00053         struct expr *expr;
    00054         tristate tri;
    00055 };
    00056
    00057 struct symbol_value {
    00058         void *val;
    00059         tristate tri;
    00060 };
    00061
    00062 enum symbol_type {
    00063         S_UNKNOWN, S_BOOLEAN, S_TRISTATE, S_INT, S_HEX, S_STRING, S_OTHER
    00064 };
    00065
    00066 struct symbol {
    00067         struct symbol *next;
    00068         char *name;
    00069         char *help;
    00070         enum symbol_type type;
    00071         struct symbol_value curr, user;
    00072         tristate visible;
    00073         int flags;
    00074         struct property *prop;
    00075         struct expr *dep, *dep2;
    00076         struct expr_value rev_dep;
    00077 };
    00078
    00079 #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)
    00080
    00081 #define SYMBOL_YES              0x0001
    00082 #define SYMBOL_MOD              0x0002
    00083 #define SYMBOL_NO               0x0004
    00084 #define SYMBOL_CONST            0x0007
    00085 #define SYMBOL_CHECK            0x0008
    00086 #define SYMBOL_CHOICE           0x0010
    00087 #define SYMBOL_CHOICEVAL        0x0020
    00088 #define SYMBOL_PRINTED          0x0040
    00089 #define SYMBOL_VALID            0x0080
    00090 #define SYMBOL_OPTIONAL         0x0100
    00091 #define SYMBOL_WRITE            0x0200
    00092 #define SYMBOL_CHANGED          0x0400
    00093 #define SYMBOL_NEW              0x0800
    00094 #define SYMBOL_AUTO             0x1000
    00095 #define SYMBOL_CHECKED          0x2000
    00096 #define SYMBOL_CHECK_DONE       0x4000
    00097 #define SYMBOL_WARNED           0x8000
    00098
    00099 #define SYMBOL_MAXLENGTH        256
    00100 #define SYMBOL_HASHSIZE         257
    00101 #define SYMBOL_HASHMASK         0xff
    00102
    00103 enum prop_type {
    00104         P_UNKNOWN, P_PROMPT, P_COMMENT, P_MENU, P_DEFAULT, P_CHOICE, P_SELECT, P_RANGE
    00105 };
    00106
    00107 struct property {
    00108         struct property *next;
    00109         struct symbol *sym;
    00110         enum prop_type type;
    00111         const char *text;
    00112         struct expr_value visible;
    00113         struct expr *expr;
    00114         struct menu *menu;
    00115         struct file *file;
    00116         int lineno;
    00117 };
    00118
    00119 #define for_all_properties(sym, st, tok) \
    00120         for (st = sym->prop; st; st = st->next) \
    00121                 if (st->type == (tok))
    00122 #define for_all_defaults(sym, st) for_all_properties(sym, st, P_DEFAULT)
    00123 #define for_all_choices(sym, st) for_all_properties(sym, st, P_CHOICE)
    00124 #define for_all_prompts(sym, st) \
    00125         for (st = sym->prop; st; st = st->next) \
    00126                 if (st->text)
    00127
    00128 struct menu {
    00129         struct menu *next;
    00130         struct menu *parent;
    00131         struct menu *list;
    00132         struct symbol *sym;
    00133         struct property *prompt;
    00134         struct expr *dep;
    00135         unsigned int flags;
    00136         //char *help;
    00137         struct file *file;
    00138         int lineno;
    00139         void *data;
    00140 };
    00141
    00142 #define MENU_CHANGED            0x0001
    00143 #define MENU_ROOT               0x0002
    00144
    00145 #ifndef SWIG
    00146
    00147 extern struct file *file_list;
    00148 extern struct file *current_file;
    00149 struct file *lookup_file(const char *name);
    00150
    00151 extern struct symbol symbol_yes, symbol_no, symbol_mod;
    00152 extern struct symbol *modules_sym;
    00153 extern int cdebug;
    00154 struct expr *expr_alloc_symbol(struct symbol *sym);
    00155 struct expr *expr_alloc_one(enum expr_type type, struct expr *ce);
    00156 struct expr *expr_alloc_two(enum expr_type type, struct expr *e1, struct expr *e2);
    00157 struct expr *expr_alloc_comp(enum expr_type type, struct symbol *s1, struct symbol *s2);
    00158 struct expr *expr_alloc_and(struct expr *e1, struct expr *e2);
    00159 struct expr *expr_alloc_or(struct expr *e1, struct expr *e2);
    00160 struct expr *expr_copy(struct expr *org);
    00161 void expr_free(struct expr *e);
    00162 int expr_eq(struct expr *e1, struct expr *e2);
    00163 void expr_eliminate_eq(struct expr **ep1, struct expr **ep2);
    00164 tristate expr_calc_value(struct expr *e);
    00165 struct expr *expr_eliminate_yn(struct expr *e);
    00166 struct expr *expr_trans_bool(struct expr *e);
    00167 struct expr *expr_eliminate_dups(struct expr *e);
    00168 struct expr *expr_transform(struct expr *e);
    00169 int expr_contains_symbol(struct expr *dep, struct symbol *sym);
    00170 bool expr_depends_symbol(struct expr *dep, struct symbol *sym);
    00171 struct expr *expr_extract_eq_and(struct expr **ep1, struct expr **ep2);
    00172 struct expr *expr_extract_eq_or(struct expr **ep1, struct expr **ep2);
    00173 void expr_extract_eq(enum expr_type type, struct expr **ep, struct expr **ep1, struct expr **ep2);
    00174 struct expr *expr_trans_compare(struct expr *e, enum expr_type type, struct symbol *sym);
    00175
    00176 void expr_fprint(struct expr *e, FILE *out);
    00177 void print_expr(int mask, struct expr *e, int prevtoken);
    00178
    00179 static inline int expr_is_yes(struct expr *e)
    00180 {
    00181         return !e || (e->type == E_SYMBOL && e->left.sym == &symbol_yes);
    00182 }
    00183
    00184 static inline int expr_is_no(struct expr *e)
    00185 {
    00186         return e && (e->type == E_SYMBOL && e->left.sym == &symbol_no);
    00187 }
    00188 #endif
    00189
    00190 #ifdef __cplusplus
    00191 }
    00192 #endif
    00193
    00194 #endif /* EXPR_H */