Adding upstream version 1.44.3.upstream/1.44.3upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 53 insertions, 0 deletions

diff --git a/mqtt_websockets/c-rbuf/include/ringbuffer.h b/mqtt_websockets/c-rbuf/include/ringbuffer.h
new file mode 100644
index 00000000..cc8d334c
--- /dev/null
+++ b/mqtt_websockets/c-rbuf/include/ringbuffer.h
@@ -0,0 +1,53 @@
+/*
+ *
+ * Copyright: SPDX-License-Identifier:  LGPL-3.0-only
+ *
+ * Author: Timotej Šiškovič <timotejs@gmail.com>
+ *
+ */
+
+#ifndef RINGBUFFER_H
+#define RINGBUFFER_H
+
+#include <stddef.h>
+
+typedef struct rbuf_t *rbuf_t;
+
+rbuf_t rbuf_create(size_t size);
+void rbuf_free(rbuf_t buffer);
+void rbuf_flush(rbuf_t buffer);
+
+/* /param bytes how much bytes can be copied into pointer returned
+ * /return pointer where data can be copied to or NULL if buffer full
+ */
+char *rbuf_get_linear_insert_range(rbuf_t buffer, size_t *bytes);
+char *rbuf_get_linear_read_range(rbuf_t buffer, size_t *bytes);
+
+int rbuf_bump_head(rbuf_t buffer, size_t bytes);
+int rbuf_bump_tail(rbuf_t buffer, size_t bytes);
+
+/* @param buffer related buffer instance
+ * @returns total capacity of buffer in bytes (not free/used)
+ */
+size_t rbuf_get_capacity(rbuf_t buffer);
+
+/* @param buffer related buffer instance
+ * @returns count of bytes stored in the buffer
+ */
+size_t rbuf_bytes_available(rbuf_t buffer);
+
+/* @param buffer related buffer instance
+ * @returns count of bytes available/free in the buffer (how many more bytes you can store in this buffer)
+ */
+size_t rbuf_bytes_free(rbuf_t buffer);
+
+/* writes as many bytes from `data` into the `buffer` as possible
+ * but maximum `len` bytes
+ */
+size_t rbuf_push(rbuf_t buffer, const char *data, size_t len);
+size_t rbuf_pop(rbuf_t buffer, char *data, size_t len);
+
+char *rbuf_find_bytes(rbuf_t buffer, const char *needle, size_t needle_bytes, int *found_idx);
+int rbuf_memcmp_n(rbuf_t buffer, const char *to_cmp, size_t to_cmp_bytes);
+
+#endif