使用 logger 替代 printf 函数

src/utils.h

@@ -1,5 +1,7 @@
 #pragma once
 
+#include <stdarg.h>
+#include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 
@@ -70,3 +72,18 @@ void _warn(int line, const char *function, const char *file, const char *format,
            ...) __attribute__((format(printf, 4, 5)));
 
 const char *current_time_str(void);
+
+#if defined(RELEASE)
+#define logger(format, ...)
+#elif defined(LOG_FILE)
+static inline void logger(const char *format, ...) {
+  va_list ap;
+  va_start(ap, format);
+  FILE *log_file = fopen(LOG_FILE, "a+t");
+  vfprintf(log_file, format, ap);
+  va_end(ap);
+  fclose(log_file);
+}
+#else
+#define logger(format, ...) printf(format, ##__VA_ARGS__)
+#endif