Use callback function to log to stderr

1 files changed, 13 insertions, 0 deletions

diff --git a/test/test.h b/test/test.h
index 1bbb9fc..415e093 100644
--- a/test/test.h
+++ b/test/test.h
@@ -1,4 +1,5 @@
 #include <inttypes.h>
+#include <stdarg.h>
 #include <stdbool.h>
 #include <stdio.h>
 #include <stdlib.h>
@@ -24,3 +25,15 @@ bool issolvable(cube_t);
 bool issolved(cube_t);
 cube_t readcube(char *, char *);
 void writecube(char *, cube_t, char *);
+void nissy_setlogger(void (*logger_function)(const char *, va_list));
+
+/* Test function to be implemented by all tests */
+void run(void);
+
+void log_stderr(const char *str, va_list vl) { vfprintf(stderr, str, vl); }
+
+int main(void) {
+        nissy_setlogger(log_stderr);
+        run();
+        return 0;
+}