List and Compiler

src/collections/List.h

@@ -0,0 +1,41 @@
+#pragma once
+#include "../std.h"
+
+#define List_declare(T)\
+    typedef struct List_##T {\
+        T* data;\
+        u32 len;\
+        u32 max_len;\
+    } List_##T;\
+    \
+    static inline List_##T List_##T##_construct(T* data_ptr, u32 len, u32 max_len) {\
+        return (List_##T){ .data = data_ptr, .len = len, .max_len = max_len };\
+    }\
+    \
+    static inline List_##T List_##T##_alloc(u32 len){\
+        return List_##T##_construct(len > 0 ? malloc(len * sizeof(T)) : NULL, 0, 0);\
+    }\
+    \
+    void List_##T##_push(List_##T* ptr, T value);
+
+
+#define List_define(T)\
+    void List_##T##_push(List_##T* ptr, T value){\
+        u32 max_len = ptr->max_len;\
+        if(ptr->len == max_len){\
+            max_len = max_len * 1.5;\
+            max_len += __List_padding_in_sizeof_T(T);\
+            /* branchless version of max(max_len, __List_min_size) */\
+            max_len += (max_len < __List_min_size) * (__List_min_size - max_len);\
+            ptr->data = realloc(ptr->data, max_len * sizeof(T));\
+            ptr->max_len = max_len;\
+        }\
+        ptr->data[ptr->len++] = value;\
+    }
+
+#define __List_min_size 16
+
+// sizeof(T) == 1  - padding is 7 of sizeof(T)
+// sizeof(T) == 2  - padding is 3 of sizeof(T)
+// sizeof(T) == 4  - padding is 1 of sizeof(T)
+#define __List_padding_in_sizeof_T(T) ((8 - sizeof(T) % 8) / sizeof(T) )