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[smdp.git] / include / cstack.h

diff --git a/include/cstack.h b/include/cstack.h
index d6ca407..fd6c60d 100644 (file)
--- a/include/cstack.h
+++ b/include/cstack.h
@@ -2,7 +2,24 @@
 #define CSTACK_H
 
 /*
- * A implementation of a char stack in heap memory.
+ * An implementation of a char stack in heap memory.
+ * Copyright (C) 2014 Michael Goehler
+ *
+ * This file is part of mdp.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ *
  *
  * struct: cstack_t which defines char stack type in heap memory
  *
@@ -21,6 +38,8 @@
  *
  */
 
+#include "common.h"
+
 typedef struct _cstack_t {
     char *content;
     size_t alloc;
@@ -28,16 +47,16 @@ typedef struct _cstack_t {
     int head;
     void (*push)(struct _cstack_t *self, char c);
     char (*pop)(struct _cstack_t *self);
-    int (*top)(struct _cstack_t *self, char c);
-    int (*empty)(struct _cstack_t *self);
+    bool (*top)(struct _cstack_t *self, char c);
+    bool (*empty)(struct _cstack_t *self);
     void (*delete)(struct _cstack_t *self);
 } cstack_t;
 
 cstack_t *cstack_init();
 void cstack_push(cstack_t *self, char c);
 char cstack_pop(cstack_t *self);
-int cstack_top(cstack_t *self, char c);
-int cstack_empty(cstack_t *self);
+bool cstack_top(cstack_t *self, char c);
+bool cstack_empty(cstack_t *self);
 void cstack_delete(cstack_t *self);
 
-#endif // !defined( CSTACK_H )
\ No newline at end of file
+#endif // !defined( CSTACK_H )