From 4ec68e612e5d6670a154677b4c8914f22153b122 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Karel=20Ko=C4=8D=C3=AD?= <cynerd@email.cz>
Date: Sun, 14 Dec 2014 19:28:28 +0100
Subject: Add kconfig_parser

kconfig_parser is placed to new folder tree. In folder "programs" will be all programs.
Files in folder programs/src/kconfig/kconfig are taken from kernel v3.18-rc3. In future, they should be updated if new changes will be added to kernel.
---
 programs/src/kconfig/boolexp.c | 141 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 141 insertions(+)
 create mode 100644 programs/src/kconfig/boolexp.c

(limited to 'programs/src/kconfig/boolexp.c')

diff --git a/programs/src/kconfig/boolexp.c b/programs/src/kconfig/boolexp.c
new file mode 100644
index 0000000..a41937a
--- /dev/null
+++ b/programs/src/kconfig/boolexp.c
@@ -0,0 +1,141 @@
+#include "boolexp.h"
+
+struct boolexp *copy_kconfig_dep(struct symlist *sl, struct expr *expr) {
+    struct boolexp *w;
+    switch (expr->type) {
+    case E_SYMBOL:
+        w = malloc(sizeof(struct boolexp));
+        w->type = BE_LEAF;
+        struct symlist_el *sel;
+        sel = symlist_find(sl, expr->left.sym->name);
+        if (sel == NULL)
+            return NULL;
+        w->left.id = sel->id;
+        return w;
+    case E_AND:
+    case E_OR:
+        w = malloc(sizeof(struct boolexp));
+        switch (expr->type) {
+        case E_AND:
+            w->type = BE_AND;
+            break;
+        case E_OR:
+            w->type = BE_OR;
+            break;
+        }
+        w->left.be = copy_kconfig_dep(sl, expr->left.expr);
+        if (w->left.be == NULL) {
+            free(w);
+            return copy_kconfig_dep(sl, expr->right.expr);
+        }
+        w->right.be = copy_kconfig_dep(sl, expr->right.expr);
+        if (w->right.be == NULL) {
+            struct boolexp *ret = w->left.be;
+            free(w);
+            return ret;
+        }
+        return w;
+    case E_EQUAL:
+    case E_UNEQUAL:
+        return NULL;
+    case E_NOT:
+        w = malloc(sizeof(struct boolexp));
+        w->type = BE_NOT;
+        w->left.be = copy_kconfig_dep(sl, expr->left.expr);
+        if (w->left.be == NULL) {
+            free(w);
+            return NULL;
+        }
+        return w;
+    default:
+        fprintf(stderr, "Error (%d): %s\n", expr->type,
+                sym_type_name(expr->type));
+        return NULL;
+    }
+}
+
+// This function is leaking memory! TODO
+struct boolexp *boolexp_cnf(struct boolexp *be) {
+    if (be->type == BE_NOT) {
+        if (be->left.be->type == BE_OR || be->left.be->type == BE_AND) {
+            struct boolexp *root, *nleft, *nright;
+            root = malloc(sizeof(struct boolexp));
+            nleft = malloc(sizeof(struct boolexp));
+            nright = malloc(sizeof(struct boolexp));
+            if (be->left.be->type == BE_OR)
+                root->type = BE_AND;
+            else if (be->left.be->type == BE_AND)
+                root->type = BE_OR;
+            nleft->type = BE_NOT;
+            nright->type = BE_NOT;
+            root->left.be = nleft;
+            root->right.be = nright;
+            nleft->left.be = be->left.be;
+            nright->left.be = be->right.be;
+            be = root;
+        }
+    } else if (be->type == BE_OR)
+        if (be->left.be->type == BE_AND) {
+            struct boolexp *root, *nleft, *nright;
+            root = malloc(sizeof(struct boolexp));
+            nleft = malloc(sizeof(struct boolexp));
+            nright = malloc(sizeof(struct boolexp));
+            root->type = BE_AND;
+            nleft->type = BE_OR;
+            nright->type = BE_OR;
+            root->left.be = nleft;
+            root->right.be = nright;
+            nleft->left.be = be->left.be->left.be;
+            nleft->right.be = be->right.be;
+            nright->left.be = be->left.be->right.be;
+            nright->right.be = be->right.be;
+            be = root;
+        } else if (be->right.be->type == BE_AND) {
+            struct boolexp *root, *nleft, *nright;
+            root = malloc(sizeof(struct boolexp));
+            nleft = malloc(sizeof(struct boolexp));
+            nright = malloc(sizeof(struct boolexp));
+            root->type = BE_AND;
+            nleft->type = BE_OR;
+            nright->type = BE_OR;
+            root->left.be = nleft;
+            root->right.be = nright;
+            nleft->left.be = be->left.be;
+            nleft->right.be = be->right.be->left.be;
+            nright->left.be = be->left.be;
+            nright->right.be = be->right.be->right.be;
+            be = root;
+        }
+    if (be->type == BE_OR || be->type == BE_AND || be->type == BE_NOT)
+        be->left.be = boolexp_cnf(be->left.be);
+    if (be->type == BE_OR || be->type == BE_AND)
+        be->right.be = boolexp_cnf(be->right.be);
+    return be;
+}
+
+void boolexp_print(struct boolexp *be) {
+    if (be != NULL)
+        switch (be->type) {
+        case BE_LEAF:
+            printf("%d", be->left.id);
+            break;
+        case BE_AND:
+            //printf("(");
+            boolexp_print(be->left.be);
+            printf(" and ");
+            boolexp_print(be->right.be);
+            //printf(")");
+            break;
+        case BE_OR:
+            printf("(");
+            boolexp_print(be->left.be);
+            printf(" or ");
+            boolexp_print(be->right.be);
+            printf(")");
+            break;
+        case BE_NOT:
+            printf("-");
+            boolexp_print(be->left.be);
+            break;
+        }
+}
-- 
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