update

os.h

@@ -9,4 +9,12 @@ void os_reserve(void *ptr);
 void os_decommit(void *ptr);
 void os_free(void *ptr, size_t freeSize);
 
+// ### File IO ###
+string os_readEntireFile(Arena *arena, string filename); 
+bool os_writeEntireFile(Arena *arena, string filename, const byte *contents, size_t contentsLength); 
+bool os_fileAppend(Arena *arena, string filename, const byte *contents, size_t contentsLength); 
+
+// ### Standard IO ###
+void os_log(LogTarget target, const char *fmt, va_list argList);
+
 #endif