* strncpy() refactor/fix

src/helpers/BaseChatMesh.cpp

@@ -55,8 +55,7 @@ void BaseChatMesh::onAdvertRecv(mesh::Packet* packet, const mesh::Identity& id,
   putBlobByKey(id.pub_key, PUB_KEY_SIZE, temp_buf, plen);
   
   // update
-  strncpy(from->name, parser.getName(), sizeof(from->name)-1);
-  from->name[sizeof(from->name)-1] = 0;
+  StrHelper::strncpy(from->name, parser.getName(), sizeof(from->name));
   from->type = parser.getType();
   if (parser.hasLatLon()) {
     from->gps_lat = parser.getIntLat();

src/helpers/TxtDataHelpers.cpp

@@ -0,0 +1,9 @@
+#include "TxtDataHelpers.h"
+
+void StrHelper::strncpy(char* dest, const char* src, size_t buf_sz) {
+  while (buf_sz > 1 && *src) {
+    *dest++ = *src++;
+    buf_sz--;
+  }
+  *dest = 0;  // truncates if needed
+}

src/helpers/TxtDataHelpers.h

@@ -6,3 +6,8 @@
 #define TXT_TYPE_PLAIN          0    // a plain text message
 #define TXT_TYPE_CLI_DATA       1    // a CLI command
 #define TXT_TYPE_SIGNED_PLAIN   2    // plain text, signed by sender
+
+class StrHelper {
+public:
+  static void strncpy(char* dest, const char* src, size_t buf_sz);
+};