Return allocated string instead of pointer to a string literal

Issue #110

Signed-off-by: Szczepan Zalega <szczepan@nitrokey.com>

1 files changed, 3 insertions, 1 deletions

diff --git a/NK_C_API.h b/NK_C_API.h
index 3a6aa2a..858f046 100644
--- a/NK_C_API.h
+++ b/NK_C_API.h
@@ -28,13 +28,15 @@
 #ifdef _MSC_VER
 #define NK_C_API __declspec(dllexport)
 #else
-#define NK_C_API 
+#define NK_C_API
 #endif
 
 #ifdef __cplusplus
 extern "C" {
 #endif
 
+  static const int MAXIMUM_STR_REPLY_LENGTH = 8192;
+
         /**
          * The Nitrokey device models supported by the API.
          */