reorganized build-ins and implement a circular queue as an example

src/lib/builtins/buffer.c

@@ -0,0 +1,70 @@
+#include "buffer.h"
+#include "../utils/defs.h"
+#include "../runtime/runtime.h"
+
+static int bin_new(Runtime *runtime, Object **argv, unsigned int argc, Object *rets[static MAX_RETS], Error *error)
+{
+    UNUSED(argc);
+    ASSERT(argc == 1);
+
+    long long int size = Object_ToInt(argv[0], error);
+
+    if(error->occurred == 1)
+        return -1;
+
+    Object *temp = Object_NewBuffer(size, Runtime_GetHeap(runtime), error);
+
+    if(temp == NULL)
+        return -1;
+
+    rets[0] = temp;
+    return 1;
+}
+
+static int bin_sliceUp(Runtime *runtime, Object **argv, unsigned int argc, Object *rets[static MAX_RETS], Error *error)
+{
+    UNUSED(argc);
+    ASSERT(argc == 3);
+
+    long long int offset = Object_ToInt(argv[1], error);
+    if(error->occurred == 1) return -1;
+
+    long long int length = Object_ToInt(argv[2], error);
+    if(error->occurred == 1) return -1;
+
+    Object *temp = Object_SliceBuffer(argv[0], offset, length, Runtime_GetHeap(runtime), error);
+
+    if(temp == NULL)
+        return -1;
+
+    rets[0] = temp;
+    return 1;
+}
+
+static int bin_toString(Runtime *runtime, Object **argv, unsigned int argc, Object *rets[static MAX_RETS], Error *error)
+{
+    UNUSED(argc);
+    ASSERT(argc == 1);
+
+    void *buffaddr;
+    int   buffsize;
+
+    buffaddr = Object_GetBufferAddrAndSize(argv[0], &buffsize, error);
+
+    if(error->occurred)
+        return -1;
+
+    Object *temp =  Object_FromString(buffaddr, buffsize, Runtime_GetHeap(runtime), error);
+
+    if(temp == NULL)
+        return -1;
+
+    rets[0] = temp;
+    return 1;
+}
+
+StaticMapSlot bins_buffer[] = {
+    { "new",   SM_FUNCT, .as_funct = bin_new, .argc = 1 },
+    { "sliceUp", SM_FUNCT, .as_funct = bin_sliceUp, .argc = 3 },
+    { "toString", SM_FUNCT, .as_funct = bin_toString, .argc = 1 },
+};