Initialize

list_pointer.h

@@ -0,0 +1,44 @@
+#ifndef _UTIL_LIST_POINTER_H
+#define _UTIL_LIST_POINTER_H
+#include <list>
+#include <malloc.h>
+
+template <typename T, typename R>
+bool listToPointer(std::list<T> li, R*& result, bool (*convert)(T input, R& output), void (*free)(R input)) {
+    if (!convert) return false;
+    auto sz = li.size();
+    if (sz <= 0) return false;
+    R* r = (R*)malloc(sz * sizeof(void*));
+    if (!r) {
+        return false;
+    }
+    size_t j = 0;
+    for (auto i = li.begin(); i != li.end(); ++i) {
+        auto s = *i;
+        R t;
+        if (!convert(s, t)) {
+            if (!free) {
+                for (size_t z = 0; z < j; z++) {
+                    free(r[z]);
+                }
+            }
+            ::free(r);
+            return false;
+        }
+        r[j] = t;
+        j++;
+    }
+    result = r;
+    return true;
+}
+
+template <typename T>
+void freePointerList(T* li, size_t count, void (*free)(T)) {
+    if (!li) return;
+    for (size_t i = 0; i < count; i++) {
+        if (!free) ::free(li[i]);
+        else free(li[i]);
+    }
+    ::free(li);
+}
+#endif