Add GTest

linked_stack.h

@@ -0,0 +1,81 @@
+#ifndef _UTIL_LINKED_STACK_H
+#define _UTIL_LINKED_STACK_H
+#include <functional>
+#include <stddef.h>
+#include <malloc.h>
+
+template <typename T>
+struct LinkedStack {
+    T d;
+    struct LinkedStack* next;
+};
+
+template <typename T>
+size_t linked_stack_length(struct LinkedStack<T>* top) {
+    if (!top) return 0;
+    struct LinkedStack<T>* now = top;
+    size_t i = 1;
+    while (now->next) {
+        now = now->next;
+        i += 1;
+    }
+    return i;
+}
+
+template <typename T>
+void linked_stack_clear(struct LinkedStack<T>*& top, std::function<void(T)> free_func = std::function<void(T)>()) {
+    if (!top) return;
+    struct LinkedStack<T>* tmp;
+    do {
+        if (free_func) {
+            free_func(top->d);
+        }
+        tmp = top;
+        top = top->next;
+        free(tmp);
+    } while (top);
+}
+
+template <typename T, class F>
+void linked_stack_clear(struct LinkedStack<T>*& top, F free_func) {
+    linked_stack_clear(top, std::function<void(T)>(free_func));
+}
+
+template <typename T>
+bool linked_stack_push(struct LinkedStack<T>*& top, T ele) {
+    struct LinkedStack<T>* t = (struct LinkedStack<T>*)malloc(sizeof(struct LinkedStack<T>));
+    if (!t) {
+        return false;
+    }
+    t->d = ele;
+    t->next = top;
+    top = t;
+    return true;
+}
+
+template <typename T>
+bool linked_stack_pop(struct LinkedStack<T>*& top, T& ele) {
+    if (!top) return false;
+    ele = top->d;
+    struct LinkedStack<T>* tmp = top;
+    top = top->next;
+    free(tmp);
+    return true;
+}
+
+template <typename T, typename ... Args>
+void linked_stack_iter(struct LinkedStack<T>* top, std::function<void(T, Args...)> callback, Args... args) {
+    if (!top || !callback) return;
+    struct LinkedStack<T>* now = top;
+    do {
+        callback(now->d, args...);
+        now = now->next;
+    } while (now);
+}
+
+template <typename T, class F, typename ... Args>
+void linked_stack_iter(struct LinkedStack<T>* top, F callback, Args... args) {
+    linked_stack_iter(top, std::function<void(T, Args...)>(callback), args...);
+}
+
+#endif