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diff --git a/src/reliable_text.h b/src/reliable_text.h
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+++ b/src/reliable_text.h
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+//==========================================================================
+// Name:            reliable_text.h
+//
+// Purpose:         Handles reliable text (e.g. text with FEC).
+// Created:         August 15, 2021
+// Authors:         Mooneer Salem
+//
+// License:
+//
+//  This program is free software; you can redistribute it and/or modify
+//  it under the terms of the GNU Lesser General Public License version 2.1,
+//  as published by the Free Software Foundation.  This program is
+//  distributed in the hope that it will be useful, but WITHOUT ANY
+//  WARRANTY; without even the implied warranty of MERCHANTABILITY or
+//  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public
+//  License for more details.
+//
+//  You should have received a copy of the GNU Lesser General Public License
+//  along with this program; if not, see <http://www.gnu.org/licenses/>.
+//
+//==========================================================================
+
+#ifndef RELIABLE_TEXT_H
+#define RELIABLE_TEXT_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif // __cplusplus
+
+/* Forward define struct freedv for use by the function prototypes below. */
+struct freedv;
+
+/* Hide internals of reliable_text_t. */
+typedef void* reliable_text_t;
+
+/* Function type for callback (when full reliable text has been received). */
+typedef void(*on_text_rx_t)(reliable_text_t rt, const char* txt_ptr, int length, void* state);
+
+/* Allocate reliable_text object. */
+reliable_text_t reliable_text_create();
+
+/* Destroy reliable_text object. */
+void reliable_text_destroy(reliable_text_t ptr);
+
+/* Reset reliable_text object for next sync. */
+void reliable_text_reset(reliable_text_t ptr);
+
+/* Sets string that is sent on TX. */
+void reliable_text_set_string(reliable_text_t ptr, const char* str, int strlength);
+
+/* Link FreeDV object to reliable_text object. */
+void reliable_text_use_with_freedv(reliable_text_t ptr, struct freedv* fdv, on_text_rx_t text_rx_fn, void* state);
+
+/* Returns associated struct freedv object. */
+struct freedv* reliable_text_get_freedv_obj(reliable_text_t ptr);
+
+/* Unlink FreeDV object from reliable_text object. */
+void reliable_text_unlink_from_freedv(reliable_text_t ptr);
+
+#ifdef __cplusplus
+}
+#endif // __cplusplus
+    
+#endif // RELIABLE_TEXT_H