initial commit

1 files changed, 22 insertions, 0 deletions

diff --git a/src/cbuffer.h b/src/cbuffer.h
new file mode 100644
index 0000000..5fc2de0
--- /dev/null
+++ b/src/cbuffer.h
@@ -0,0 +1,22 @@
+#include <stdint.h>
+
+#ifndef __CBUFFER_H
+#define __CBUFFER_H
+
+struct cbuffer {
+	uint8_t buffer[1 << 10];
+	int read_index;
+	int write_index;
+};
+
+#define buffer_size(buf) (sizeof((buf)->buffer))
+#define buffer_used(buf) (((buf)->write_index - (buf)->read_index) & (buffer_size(buf) - 1))
+#define buffer_free(buf) (buffer_size(buf) - 1 - buffer_used(buf))
+
+int buffered_write(int fd, struct cbuffer *buf);
+int buffered_read(int fd, struct cbuffer *buf);
+
+#define DIR_REV(i) ((i == 1) ? 0 : 1)
+
+#endif /* ~__CBUFFER_H */
+