Yet another major rework of the BusyBox config system, using the considerably

modified Kbuild system I put into uClibc.  With this, there should be no more
need to modify Rules.mak since I've moved all the interesting options into the
config system.  I think I've got everything updated, but you never know, I may
have made some mistakes, so watch closely.
 -Erik

1 files changed, 242 insertions, 0 deletions

diff --git a/scripts/config/expr.h b/scripts/config/expr.h
new file mode 100644
index 000000000..e96d03b5a
--- /dev/null
+++ b/scripts/config/expr.h
@@ -0,0 +1,242 @@
+/*
+ * 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;
+#ifdef CML1
+        struct statement *stmt;
+        struct statement *last_stmt;
+#endif
+        char *name;
+        int lineno;
+        int flags;
+};
+
+#define FILE_BUSY               0x0001
+#define FILE_SCANNED            0x0002
+#define FILE_PRINTED            0x0004
+
+typedef enum tristate {
+        no, mod, yes
+} tristate;
+
+enum expr_type {
+        E_NONE, E_OR, E_AND, E_NOT, E_EQUAL, E_UNEQUAL, E_CHOICE, E_SYMBOL
+};
+
+union expr_data {
+        struct expr *expr;
+        struct symbol *sym;
+};
+
+struct expr {
+#ifdef CML1
+        int token;
+#else
+        enum expr_type type;
+#endif
+        union expr_data left, right;
+};
+
+#define E_TRI(ev)       ((ev).tri)
+#define E_EXPR(ev)      ((ev).expr)
+#define E_CALC(ev)      (E_TRI(ev) = expr_calc_value(E_EXPR(ev)))
+
+#define E_OR(dep1, dep2)        (((dep1)>(dep2))?(dep1):(dep2))
+#define E_AND(dep1, dep2)       (((dep1)<(dep2))?(dep1):(dep2))
+#define E_NOT(dep)              (2-(dep))
+
+struct expr_value {
+        struct expr *expr;
+        tristate tri;
+};
+
+#define S_VAL(sv)       ((sv).value)
+#define S_TRI(sv)       ((sv).tri)
+#define S_EQ(sv1, sv2)  (S_VAL(sv1) == S_VAL(sv2) || !strcmp(S_VAL(sv1), S_VAL(sv2)))
+
+struct symbol_value {
+        void *value;
+        tristate tri;
+};
+
+enum symbol_type {
+        S_UNKNOWN, S_BOOLEAN, S_TRISTATE, S_INT, S_HEX, S_STRING, S_OTHER
+};
+
+struct symbol {
+        struct symbol *next;
+        char *name;
+        char *help;
+#ifdef CML1
+        int type;
+#else
+        enum symbol_type type;
+#endif
+        struct symbol_value curr, def;
+        tristate visible;
+        int flags;
+        struct property *prop;
+        struct expr *dep, *dep2;
+        struct menu *menu;
+};
+
+#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)
+
+#ifdef CML1
+#define SYMBOL_UNKNOWN          S_UNKNOWN
+#define SYMBOL_BOOLEAN          S_BOOLEAN
+#define SYMBOL_TRISTATE         S_TRISTATE
+#define SYMBOL_INT              S_INT
+#define SYMBOL_HEX              S_HEX
+#define SYMBOL_STRING           S_STRING
+#define SYMBOL_OTHER            S_OTHER
+#endif
+
+#define SYMBOL_YES              0x0001
+#define SYMBOL_MOD              0x0002
+#define SYMBOL_NO               0x0004
+#define SYMBOL_CONST            0x0007
+#define SYMBOL_CHECK            0x0008
+#define SYMBOL_CHOICE           0x0010
+#define SYMBOL_CHOICEVAL        0x0020
+#define SYMBOL_PRINTED          0x0040
+#define SYMBOL_VALID            0x0080
+#define SYMBOL_OPTIONAL         0x0100
+#define SYMBOL_WRITE            0x0200
+#define SYMBOL_CHANGED          0x0400
+#define SYMBOL_NEW              0x0800
+#define SYMBOL_AUTO             0x1000
+
+#define SYMBOL_MAXLENGTH        256
+#define SYMBOL_HASHSIZE         257
+#define SYMBOL_HASHMASK         0xff
+
+enum prop_type {
+        P_UNKNOWN, P_PROMPT, P_COMMENT, P_MENU, P_ROOTMENU, P_DEFAULT, P_CHOICE
+};
+
+struct property {
+        struct property *next;
+        struct symbol *sym;
+#ifdef CML1
+        int token;
+#else
+        enum prop_type type;
+#endif
+        const char *text;
+        struct symbol *def;
+        struct expr_value visible;
+        struct expr *dep;
+        struct expr *dep2;
+        struct menu *menu;
+        struct file *file;
+        int lineno;
+#ifdef CML1
+        struct property *next_pos;
+#endif
+};
+
+#define for_all_properties(sym, st, tok) \
+        for (st = sym->prop; st; st = st->next) \
+                if (st->type == (tok))
+#define for_all_prompts(sym, st) for_all_properties(sym, st, P_PROMPT)
+#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)
+
+struct menu {
+        struct menu *next;
+        struct menu *parent;
+        struct menu *list;
+        struct symbol *sym;
+        struct property *prompt;
+        struct expr *dep;
+        //char *help;
+        struct file *file;
+        int lineno;
+        void *data;
+};
+
+#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 int cdebug;
+extern int print_type;
+struct expr *expr_alloc_symbol(struct symbol *sym);
+#ifdef CML1
+struct expr *expr_alloc_one(int token, struct expr *ce);
+struct expr *expr_alloc_two(int token, struct expr *e1, struct expr *e2);
+struct expr *expr_alloc_comp(int token, struct symbol *s1, struct symbol *s2);
+#else
+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);
+#endif
+struct expr *expr_alloc_and(struct expr *e1, struct expr *e2);
+struct expr *expr_copy(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);
+
+void expr_fprint(struct expr *e, FILE *out);
+void print_expr(int mask, struct expr *e, int prevtoken);
+
+#ifdef CML1
+static inline int expr_is_yes(struct expr *e)
+{
+        return !e || (e->token == WORD && e->left.sym == &symbol_yes);
+}
+
+static inline int expr_is_no(struct expr *e)
+{
+        return e && (e->token == WORD && e->left.sym == &symbol_no);
+}
+#else
+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
+#endif
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* EXPR_H */