adjusting repo for removing extra features not part of the original library

source/base/ring.h

@@ -0,0 +1,46 @@
+#ifdef INTELLISENSE_DIRECTIVES
+#	pragma once
+#	include "base_types.h"
+#endif
+
+////////////////////////////////
+//~ rjf: Non-Fancy Ring Buffer Reads/Writes
+
+U64 ring_write(U8* ring_base, U64 ring_size, U64 ring_pos, void* src_data, U64 src_data_size);
+U64 ring_read (U8* ring_base, U64 ring_size, U64 ring_pos, void* dst_data, U64 read_size);
+
+#define ring_write_struct(ring_base, ring_size, ring_pos, ptr) ring_write((ring_base), (ring_size), (ring_pos), (ptr), sizeof(*(ptr)))
+#define ring_read_struct(ring_base, ring_size, ring_pos, ptr)  ring_read ((ring_base), (ring_size), (ring_pos), (ptr), sizeof(*(ptr)))
+
+////////////////////////////////
+//~ rjf: Non-Fancy Ring Buffer Reads/Writes
+
+inline U64
+ring_write(U8* ring_base, U64 ring_size, U64 ring_pos, void* src_data, U64 src_data_size) {
+	assert(src_data_size <= ring_size);
+	{
+		U64   ring_off           = ring_pos % ring_size;
+		U64   bytes_before_split = ring_size - ring_off;
+		U64   pre_split_bytes    = min(bytes_before_split, src_data_size);
+		U64   pst_split_bytes    = src_data_size - pre_split_bytes;
+		void* pre_split_data     = src_data;
+		void* pst_split_data     = ((U8*)src_data + pre_split_bytes);
+		memory_copy(ring_base + ring_off, pre_split_data, pre_split_bytes);
+		memory_copy(ring_base + 0, pst_split_data, pst_split_bytes);
+	}
+	return src_data_size;
+}
+
+inline U64
+ring_read(U8* ring_base, U64 ring_size, U64 ring_pos, void* dst_data, U64 read_size) {
+	assert(read_size <= ring_size);
+	{
+		U64 ring_off           = ring_pos % ring_size;
+		U64 bytes_before_split = ring_size-ring_off;
+		U64 pre_split_bytes    = min(bytes_before_split, read_size);
+		U64 pst_split_bytes    = read_size - pre_split_bytes;
+		memory_copy(dst_data, ring_base+ring_off, pre_split_bytes);
+		memory_copy((U8*)dst_data + pre_split_bytes, ring_base + 0, pst_split_bytes);
+	}
+	return read_size;
+}