--- /dev/null
+/*
+ * Copyright (C) 2002 Roman Zippel <zippel@linux-m68k.org>
+ * Released under the terms of the GNU GPL v2.0.
+ */
+
+#ifndef EXPR_H
+#define EXPR_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include <stdio.h>
+#ifndef __cplusplus
+#include <stdbool.h>
+#endif
+
+struct file {
+ struct file *next;
+ struct file *parent;
+ const char *name;
+ int lineno;
+ int flags;
+};
+
+#define FILE_BUSY 0x0001
+#define FILE_SCANNED 0x0002
+
+typedef enum tristate {
+ no, mod, yes
+} tristate;
+
+enum expr_type {
+ E_NONE, E_OR, E_AND, E_NOT, E_EQUAL, E_UNEQUAL, E_LIST, E_SYMBOL, E_RANGE
+};
+
+union expr_data {
+ struct expr *expr;
+ struct symbol *sym;
+};
+
+struct expr {
+ enum expr_type type;
+ union expr_data left, right;
+};
+
+#define EXPR_OR(dep1, dep2) (((dep1)>(dep2))?(dep1):(dep2))
+#define EXPR_AND(dep1, dep2) (((dep1)<(dep2))?(dep1):(dep2))
+#define EXPR_NOT(dep) (2-(dep))
+
+#define expr_list_for_each_sym(l, e, s) \
+ for (e = (l); e && (s = e->right.sym); e = e->left.expr)
+
+struct expr_value {
+ struct expr *expr;
+ tristate tri;
+};
+
+struct symbol_value {
+ void *val;
+ tristate tri;
+};
+
+enum symbol_type {
+ S_UNKNOWN, S_BOOLEAN, S_TRISTATE, S_INT, S_HEX, S_STRING, S_OTHER
+};
+
+/* enum values are used as index to symbol.def[] */
+enum {
+ S_DEF_USER, /* main user value */
+ S_DEF_AUTO, /* values read from auto.conf */
+ S_DEF_DEF3, /* Reserved for UI usage */
+ S_DEF_DEF4, /* Reserved for UI usage */
+ S_DEF_COUNT
+};
+
+struct symbol {
+ struct symbol *next;
+ char *name;
+ enum symbol_type type;
+ struct symbol_value curr;
+ struct symbol_value def[S_DEF_COUNT];
+ tristate visible;
+ int flags;
+ struct property *prop;
+ struct expr_value dir_dep;
+ struct expr_value rev_dep;
+};
+
+#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)
+
+#define SYMBOL_CONST 0x0001 /* symbol is const */
+#define SYMBOL_CHECK 0x0008 /* used during dependency checking */
+#define SYMBOL_CHOICE 0x0010 /* start of a choice block (null name) */
+#define SYMBOL_CHOICEVAL 0x0020 /* used as a value in a choice block */
+#define SYMBOL_VALID 0x0080 /* set when symbol.curr is calculated */
+#define SYMBOL_OPTIONAL 0x0100 /* choice is optional - values can be 'n' */
+#define SYMBOL_WRITE 0x0200 /* ? */
+#define SYMBOL_CHANGED 0x0400 /* ? */
+#define SYMBOL_AUTO 0x1000 /* value from environment variable */
+#define SYMBOL_CHECKED 0x2000 /* used during dependency checking */
+#define SYMBOL_WARNED 0x8000 /* warning has been issued */
+
+/* Set when symbol.def[] is used */
+#define SYMBOL_DEF 0x10000 /* First bit of SYMBOL_DEF */
+#define SYMBOL_DEF_USER 0x10000 /* symbol.def[S_DEF_USER] is valid */
+#define SYMBOL_DEF_AUTO 0x20000 /* symbol.def[S_DEF_AUTO] is valid */
+#define SYMBOL_DEF3 0x40000 /* symbol.def[S_DEF_3] is valid */
+#define SYMBOL_DEF4 0x80000 /* symbol.def[S_DEF_4] is valid */
+
+#define SYMBOL_MAXLENGTH 256
+#define SYMBOL_HASHSIZE 9973
+
+/* A property represent the config options that can be associated
+ * with a config "symbol".
+ * Sample:
+ * config FOO
+ * default y
+ * prompt "foo prompt"
+ * select BAR
+ * config BAZ
+ * int "BAZ Value"
+ * range 1..255
+ */
+enum prop_type {
+ P_UNKNOWN,
+ P_PROMPT, /* prompt "foo prompt" or "BAZ Value" */
+ P_COMMENT, /* text associated with a comment */
+ P_MENU, /* prompt associated with a menuconfig option */
+ P_DEFAULT, /* default y */
+ P_CHOICE, /* choice value */
+ P_SELECT, /* select BAR */
+ P_RANGE, /* range 7..100 (for a symbol) */
+ P_ENV, /* value from environment variable */
+ P_SYMBOL, /* where a symbol is defined */
+};
+
+struct property {
+ struct property *next; /* next property - null if last */
+ struct symbol *sym; /* the symbol for which the property is associated */
+ enum prop_type type; /* type of property */
+ const char *text; /* the prompt value - P_PROMPT, P_MENU, P_COMMENT */
+ struct expr_value visible;
+ struct expr *expr; /* the optional conditional part of the property */
+ struct menu *menu; /* the menu the property are associated with
+ * valid for: P_SELECT, P_RANGE, P_CHOICE,
+ * P_PROMPT, P_DEFAULT, P_MENU, P_COMMENT */
+ struct file *file; /* what file was this property defined */
+ int lineno; /* what lineno was this property defined */
+};
+
+#define for_all_properties(sym, st, tok) \
+ for (st = sym->prop; st; st = st->next) \
+ if (st->type == (tok))
+#define for_all_defaults(sym, st) for_all_properties(sym, st, P_DEFAULT)
+#define for_all_choices(sym, st) for_all_properties(sym, st, P_CHOICE)
+#define for_all_prompts(sym, st) \
+ for (st = sym->prop; st; st = st->next) \
+ if (st->text)
+
+struct menu {
+ struct menu *next;
+ struct menu *parent;
+ struct menu *list;
+ struct symbol *sym;
+ struct property *prompt;
+ struct expr *visibility;
+ struct expr *dep;
+ unsigned int flags;
+ char *help;
+ struct file *file;
+ int lineno;
+ void *data;
+};
+
+#define MENU_CHANGED 0x0001
+#define MENU_ROOT 0x0002
+
+#ifndef SWIG
+
+extern struct file *file_list;
+extern struct file *current_file;
+struct file *lookup_file(const char *name);
+
+extern struct symbol symbol_yes, symbol_no, symbol_mod;
+extern struct symbol *modules_sym;
+extern struct symbol *sym_defconfig_list;
+extern int cdebug;
+struct expr *expr_alloc_symbol(struct symbol *sym);
+struct expr *expr_alloc_one(enum expr_type type, struct expr *ce);
+struct expr *expr_alloc_two(enum expr_type type, struct expr *e1, struct expr *e2);
+struct expr *expr_alloc_comp(enum expr_type type, struct symbol *s1, struct symbol *s2);
+struct expr *expr_alloc_and(struct expr *e1, struct expr *e2);
+struct expr *expr_alloc_or(struct expr *e1, struct expr *e2);
+struct expr *expr_copy(const struct expr *org);
+void expr_free(struct expr *e);
+int expr_eq(struct expr *e1, struct expr *e2);
+void expr_eliminate_eq(struct expr **ep1, struct expr **ep2);
+tristate expr_calc_value(struct expr *e);
+struct expr *expr_eliminate_yn(struct expr *e);
+struct expr *expr_trans_bool(struct expr *e);
+struct expr *expr_eliminate_dups(struct expr *e);
+struct expr *expr_transform(struct expr *e);
+int expr_contains_symbol(struct expr *dep, struct symbol *sym);
+bool expr_depends_symbol(struct expr *dep, struct symbol *sym);
+struct expr *expr_extract_eq_and(struct expr **ep1, struct expr **ep2);
+struct expr *expr_extract_eq_or(struct expr **ep1, struct expr **ep2);
+void expr_extract_eq(enum expr_type type, struct expr **ep, struct expr **ep1, struct expr **ep2);
+struct expr *expr_trans_compare(struct expr *e, enum expr_type type, struct symbol *sym);
+struct expr *expr_simplify_unmet_dep(struct expr *e1, struct expr *e2);
+
+void expr_fprint(struct expr *e, FILE *out);
+struct gstr; /* forward */
+void expr_gstr_print(struct expr *e, struct gstr *gs);
+
+static inline int expr_is_yes(struct expr *e)
+{
+ return !e || (e->type == E_SYMBOL && e->left.sym == &symbol_yes);
+}
+
+static inline int expr_is_no(struct expr *e)
+{
+ return e && (e->type == E_SYMBOL && e->left.sym == &symbol_no);
+}
+#endif
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* EXPR_H */
