ref: c8b187f9db503465460d8bafa2d7a758bbcf59ca
dir: /lib9/sprint.c/
/* * The authors of this software are Rob Pike and Ken Thompson. * Copyright (c) 2002 by Lucent Technologies. * Permission to use, copy, modify, and distribute this software for any * purpose without fee is hereby granted, provided that this entire notice * is included in all copies of any software which is or includes a copy * or modification of this software and in all copies of the supporting * documentation for such software. * THIS SOFTWARE IS BEING PROVIDED "AS IS", WITHOUT ANY EXPRESS OR IMPLIED * WARRANTY. IN PARTICULAR, NEITHER THE AUTHORS NOR LUCENT TECHNOLOGIES MAKE ANY * REPRESENTATION OR WARRANTY OF ANY KIND CONCERNING THE MERCHANTABILITY * OF THIS SOFTWARE OR ITS FITNESS FOR ANY PARTICULAR PURPOSE. */ #include "lib9.h" int sprint(char *buf, char *fmt, ...) { int n; uint len; va_list args; len = 1<<30; /* big number, but sprint is deprecated anyway */ /* * the stack might be near the top of memory, so * we must be sure not to overflow a 32-bit pointer. */ if((uintptr)buf+len < (uintptr)buf) len = -(uint)buf-1; va_start(args, fmt); n = vsnprint(buf, len, fmt, args); va_end(args); return n; }