* new StrHelper::strzcpy()

src/helpers/TxtDataHelpers.cpp

@@ -7,3 +7,14 @@ void StrHelper::strncpy(char* dest, const char* src, size_t buf_sz) {
   }
   *dest = 0;  // truncates if needed
 }
+
+void StrHelper::strzcpy(char* dest, const char* src, size_t buf_sz) {
+  while (buf_sz > 1 && *src) {
+    *dest++ = *src++;
+    buf_sz--;
+  }
+  while (buf_sz > 0) {  // pad remaining with nulls
+    *dest++ = 0;
+    buf_sz--;
+  }
+}