1 files changed, 39 insertions, 0 deletions
diff --git a/examples/dte/block.h b/examples/dte/block.h
new file mode 100644
index 0000000..6fbf361
--- /dev/null
+++ b/examples/dte/block.h
@@ -0,0 +1,39 @@
+#ifndef BLOCK_H
+#define BLOCK_H
+
+#include <stddef.h>
+#include "util/list.h"
+#include "util/macros.h"
+
+enum {
+    BLOCK_ALLOC_MULTIPLE = 64
+};
+
+// Blocks always contain whole lines.
+// There's one zero-sized block for an empty file.
+// Otherwise zero-sized blocks are forbidden.
+typedef struct {
+    ListHead node;
+    unsigned char NONSTRING *data;
+    size_t size;
+    size_t alloc;
+    size_t nl;
+} Block;
+
+#define block_for_each(block_, list_head_) \
+    for ( \
+        block_ = BLOCK((list_head_)->next); \
+        &block_->node != (list_head_); \
+        block_ = BLOCK(block_->node.next) \
+    )
+
+static inline Block *BLOCK(ListHead *item)
+{
+    static_assert(offsetof(Block, node) == 0);
+    return (Block*)item;
+}
+
+Block *block_new(size_t alloc) RETURNS_NONNULL;
+void block_free(Block *blk) NONNULL_ARGS;
+
+#endif