From 3ece47889a4dbd35fb7c3341a636bf5dfe1a37cf Mon Sep 17 00:00:00 2001
From: Matthias Ringwald <matthias@ringwald.ch>
Date: Fri, 29 Apr 2022 11:20:12 +0200
Subject: [PATCH] btstack_util: add btstack_strcat

---
 src/btstack_util.c | 8 ++++++++
 src/btstack_util.h | 9 +++++++++
 2 files changed, 17 insertions(+)

diff --git a/src/btstack_util.c b/src/btstack_util.c
index 328302a00..869160550 100644
--- a/src/btstack_util.c
+++ b/src/btstack_util.c
@@ -499,3 +499,11 @@ void btstack_strcpy(char * dst, uint16_t dst_size, const char * src){
     (void) memcpy(dst, src, bytes_to_copy);
     dst[bytes_to_copy] = 0;
 }
+
+void btstack_strcat(char * dst, uint16_t dst_size, const char * src){
+    uint16_t src_len = (uint16_t) strlen(src);
+    uint16_t dst_len = (uint16_t) strlen(dst);
+    uint16_t bytes_to_copy = btstack_min( src_len, dst_size - dst_len - 1);
+    (void) memcpy( &dst[dst_len], src, bytes_to_copy);
+    dst[dst_len + bytes_to_copy] = 0;
+}
diff --git a/src/btstack_util.h b/src/btstack_util.h
index 653ef2576..91b87b908 100644
--- a/src/btstack_util.h
+++ b/src/btstack_util.h
@@ -319,6 +319,15 @@ uint16_t btstack_next_cid_ignoring_zero(uint16_t current_cid);
  */
 void btstack_strcpy(char * dst, uint16_t dst_size, const char * src);
 
+/**
+ * @brief Append src string to string in dst buffer with terminating '\0'
+ * @note max total string length will be dst_size-1 characters
+ * @param dst
+ * @param dst_size
+ * @param src
+ */
+void btstack_strcat(char * dst, uint16_t dst_size, const char * src);
+
 /* API_END */
 
 #if defined __cplusplus