treewide: rework source file and callstack handling

 - Keep an open FILE* reference to processed source files in order to
   be able to rewind and extract error context later
 - Build a proper call stack when invoking utpl functions
 - Report call stack in exceptions

Signed-off-by: Jo-Philipp Wich <jo@mein.io>

1 files changed, 1 insertions, 1 deletions

diff --git a/lib.h b/lib.h
index 9471141..084714d 100644
--- a/lib.h
+++ b/lib.h
@@ -28,6 +28,6 @@ typedef struct json_object *(ut_c_fn)(struct ut_state *, uint32_t, struct json_o
 
 void ut_lib_init(struct ut_state *state, struct json_object *scope);
 
-char *ut_format_error(struct ut_state *state, const char *expr);
+char *ut_format_error(struct ut_state *state, FILE *fp);
 
 #endif /* __LIB_H_ */