X-Git-Url: https://git.danieliu.xyz/?a=blobdiff_plain;f=cstack.c;h=2db539f41968442841bf5849ff4738bda773a20c;hb=3da34e1957b3484506b5f0f79f84f64a4cff2f1b;hp=647443613f6c5b87475a34cb226685046f53eb9b;hpb=584bba9e9357ff7adc0fcedf75fb098c359abb33;p=smdp.git
diff --git a/cstack.c b/cstack.c
index 6474436..2db539f 100644
--- a/cstack.c
+++ b/cstack.c
@@ -1,3 +1,24 @@
+/*
+ * An implementation of a char stack in heap memory.
+ * Copyright (C) 2014 Michael Goehler
+ *
+ * This file is part of mpd.
+ *
+ * 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 .
+ *
+ */
+
#include // malloc, realloc
#include "include/cstack.h"
@@ -29,8 +50,10 @@ char cstack_pop(cstack_t *self) {
return self->content[self->head--];
}
-char cstack_top(cstack_t *self) {
- return self->content[self->head];
+int cstack_top(cstack_t *self, char c) {
+ if(self->head >= 0 && self->content[self->head] == c)
+ return 1;
+ return 0;
}
int cstack_empty(cstack_t *self) {