-const char *memreadline(const char *start, char *buf, int maxlen);
-const char *memreadlinelen(const char *start, char *buf, int maxlen, int *retlen);
+char *memreadline(char *start, char *buf, int maxlen);
+char *memreadlinelen(char *start, char *buf, int maxlen, int *retlen);
+const char *cmemreadline(const char *start, char *buf, int maxlen);
+const char *cmemreadlinelen(const char *start, char *buf, int maxlen, int *retlen);