Initial upload

ptr_stack.c

@@ -0,0 +1,33 @@
+/* vim: set filetype=c: */
+
+#include "ptr_stack.h"
+
+#include <malloc.h>
+
+void PtrStack_init(PtrStack* obj) {
+    obj->top = NULL;
+    obj->size = 0;
+}
+
+void PtrStack_push(PtrStack* obj, void* ptr) {
+    PtrStackItem* itm = malloc(sizeof(PtrStackItem));
+    itm->ptr = ptr;
+    itm->prev = obj->top;
+    obj->top = itm;
+    obj->size++;
+}
+void PtrStack_pop(PtrStack* obj) {
+    PtrStackItem* itm = obj->top;
+    obj->top = itm->prev;
+    free(itm);
+    obj->size--;
+}
+
+void PtrStack_uninit(PtrStack* obj) {
+    PtrStackItem* curr = obj->top;
+    while(curr != NULL) {
+        PtrStackItem* prev = curr->prev;
+        free(curr);
+        curr = prev;
+    }
+}