fix: refactor code structure into files (#8)

closes #7

Co-authored-by: HiveBeats <e1lama@protonmail.com>
Reviewed-on: #8

ring_buffer.c

@@ -0,0 +1,99 @@
+#include "ring_buffer.h"
+#include "utils.h"
+
+RingBuffer ring_buffer_init(size_t buffer_size) {
+    RingBuffer buffer = {
+        .items = calloc(buffer_size, sizeof(float)),
+        .head = 0,
+        .tail = 0,
+        .is_full = 0,
+        .is_empty = 1,
+        .size = buffer_size
+    };
+
+    return buffer;
+}
+
+void ring_buffer_reset(RingBuffer* me) {
+    me->head = 0;
+    me->tail = 0;
+    me->is_full = 0;
+}
+
+// +
+static void advance_pointer(RingBuffer* me) {
+    if(me->is_full) {
+        me->tail++;
+		if (me->tail == me->size) { 
+			me->tail = 0;
+		}
+	}
+    me->head++;
+	if (me->head == me->size) { 
+		me->head = 0;
+	}
+    size_t is_full = me->head == me->tail ? 1 : 0;
+	me->is_full = is_full;
+}
+
+// -
+static void retreat_pointer(RingBuffer* me) {
+	me->is_full = 0;
+    me->tail++;
+	if (me->tail == me->size) { 
+		me->tail = 0;
+	}
+}
+
+void ring_buffer_write(RingBuffer* buffer, float* data, size_t count) {
+    if (buffer->is_full || buffer->head + count > buffer->size) {
+        write_log("[WARN] Trying to overfill the ring buffer: \n\tIsFull:%d\n\tHead:%zu\n\tCount:%zu\n\t", 
+            buffer->is_full,
+            buffer->head, 
+            count);
+        return;
+    }
+    buffer->is_empty = 0;
+
+    for (size_t i = 0; i < count; i++) {
+        buffer->items[buffer->head] = data[i];
+        advance_pointer(buffer);
+    }
+    //me->is_empty = is_full && (me->head == me->tail);
+}
+
+int ring_buffer_read(RingBuffer* buffer, float* output, size_t count) {
+    if (buffer->is_empty) {
+        write_log("[WARN] Trying to read empty buffer");
+        return 0;
+    }
+
+    for (size_t i = 0; i < count; i++) {
+        output[i] = buffer->items[buffer->tail];
+        retreat_pointer(buffer);
+    }
+    buffer->is_empty = !buffer->is_full && (buffer->head == buffer->tail);
+    return 1;
+}
+
+size_t ring_buffer_size(RingBuffer* buffer) {
+	size_t size = buffer->size;
+	if(!buffer->is_full) {
+		if(buffer->head >= buffer->tail) {
+			size = (buffer->head - buffer->tail);
+		}
+		else {
+			size = (buffer->size + buffer->head - buffer->tail);
+		}
+	}
+
+	return size;
+}
+
+void ring_buffer_print(RingBuffer* me) {
+    write_log("[INFO] The ring buffer: \n\tIsFull:%d\n\tIsEmpty:%d\n\tHead:%zu\n\tTail:%zu\n\t", 
+                me->is_full, 
+                me->is_empty, 
+                me->head, 
+                me->tail);
+}