diff --git a/circbuf.c b/circbuf.c
index b9d2892..764c2ae 100644
--- a/circbuf.c
+++ b/circbuf.c
@@ -103,12 +103,30 @@ bool cbuf_write_n(CircularBuffer *inst, const uint8_t *b, uint16_t count)
 }
 
 
+uint16_t cbuf_write_partial(CircularBuffer *inst, const uint8_t *b, uint16_t max)
+{
+	uint16_t  i;
+	for (i = 0; i < max; i++) {
+		if (cbuf_empty(inst)) break;
+		cbuf_write(inst, *(b + i));
+	}
+
+	return i;
+}
+
+
 bool cbuf_write_string(CircularBuffer *inst, const char *str)
 {
 	return cbuf_write_n(inst, (uint8_t *) str, strlen(str));
 }
 
 
+uint16_t cbuf_write_string_partial(CircularBuffer *inst, const char *str)
+{
+	return cbuf_write_partial(inst, (uint8_t *) str, strlen(str));
+}
+
+
 bool cbuf_read_n(CircularBuffer *inst, uint8_t *buf, uint16_t len)
 {
 	if (cbuf_data_size(inst) < len) return false;
@@ -132,7 +150,7 @@ bool cbuf_read_string(CircularBuffer *inst, char *str, uint16_t len)
 }
 
 
-uint16_t cbuf_read_upto(CircularBuffer *inst, uint8_t *buf, uint16_t max)
+uint16_t cbuf_read_partial(CircularBuffer *inst, uint8_t *buf, uint16_t max)
 {
 	uint16_t i;
 	for (i = 0; i < max; i++) {
@@ -144,9 +162,9 @@ uint16_t cbuf_read_upto(CircularBuffer *inst, uint8_t *buf, uint16_t max)
 }
 
 
-uint16_t cbuf_read_string_upto(CircularBuffer *inst, char *str, uint16_t max)
+uint16_t cbuf_read_string_partial(CircularBuffer *inst, char *str, uint16_t max)
 {
-	uint16_t cnt = cbuf_read_upto(inst, (uint8_t *) str, max);
+	uint16_t cnt = cbuf_read_partial(inst, (uint8_t *) str, max);
 	str[cnt] = 0;
 	return cnt;
 }
diff --git a/circbuf.h b/circbuf.h
index e54d152..63340f7 100644
--- a/circbuf.h
+++ b/circbuf.h
@@ -31,7 +31,10 @@ bool cbuf_write(CircularBuffer *inst, uint8_t b);
 bool cbuf_read(CircularBuffer *inst, uint8_t *b);
 
 
-/** Get byte at the read cursor, without incrementing it. False on empty. */
+/**
+ * Get byte at the read cursor, without incrementing it.
+ * False on empty.
+ */
 bool cbuf_peek(CircularBuffer *inst, uint8_t *b);
 
 
@@ -47,37 +50,51 @@ uint16_t cbuf_free_space(CircularBuffer *inst);
 void cbuf_clear(CircularBuffer *inst);
 
 
-/** Write N bytes. Returns success */
+/** Write N bytes, or none. Returns success */
 bool cbuf_write_n(CircularBuffer *inst, const uint8_t *b, uint16_t count);
 
 
-/** Write a string (without \0) */
+/** Try to write N bytes. Returns actual number of bytes written. */
+uint16_t cbuf_write_partial(CircularBuffer *inst, const uint8_t *b, uint16_t max);
+
+
+/** Write a string (excluding \0) - or nothing. */
 bool cbuf_write_string(CircularBuffer *inst, const char *str);
 
 
-/** Read N bytes, if available. Returns success. */
-bool cbuf_read_n(CircularBuffer *inst, uint8_t *buf, uint16_t len);
+/**
+ * Try to write string (excluding \0).
+ * Returns actual number of chars written.
+ */
+uint16_t cbuf_write_string_partial(CircularBuffer *inst, const char *str);
 
 
-/** Read string of given length, append \0. `str` must be len+1 long */
-bool cbuf_read_string(CircularBuffer *inst, char *str, uint16_t len);
+/** Read N bytes, or none. Returns success. */
+bool cbuf_read_n(CircularBuffer *inst, uint8_t *buf, uint16_t len);
 
 
 /** Read up to N bytes. Returns byte count */
-uint16_t cbuf_read_upto(CircularBuffer *inst, uint8_t *buf, uint16_t max);
+uint16_t cbuf_read_partial(CircularBuffer *inst, uint8_t *buf, uint16_t max);
+
+
+/** Read string of given length, append \0. `str` must be len+1 long */
+bool cbuf_read_string(CircularBuffer *inst, char *str, uint16_t len);
 
 
-/** Read string up to N chars long, append \0. `str` must be max+1 long */
-uint16_t cbuf_read_string_upto(CircularBuffer *inst, char *str, uint16_t max);
+/**
+ * Read string up to N chars long, append \0.
+ * `str` must be max+1 long
+ */
+uint16_t cbuf_read_string_partial(CircularBuffer *inst, char *str, uint16_t max);
 
 
 /**
  * Search buffer and return position of the first occurence
  * of the given byte (position relative to read_pos).
- * 
- * The returned value is zero-based, add 1 to get string 
+ *
+ * The returned value is zero-based, add 1 to get string
  * length including the delimiter.
- * 
+ *
  * Returns -1 if not found.
  */
 int32_t cbuf_find(CircularBuffer *inst, uint8_t b);