diff options
Diffstat (limited to 'freebsd/sys/xdr/xdr_sizeof.c')
-rw-r--r-- | freebsd/sys/xdr/xdr_sizeof.c | 162 |
1 files changed, 162 insertions, 0 deletions
diff --git a/freebsd/sys/xdr/xdr_sizeof.c b/freebsd/sys/xdr/xdr_sizeof.c new file mode 100644 index 00000000..5452834d --- /dev/null +++ b/freebsd/sys/xdr/xdr_sizeof.c @@ -0,0 +1,162 @@ +/* + * Sun RPC is a product of Sun Microsystems, Inc. and is provided for + * unrestricted use provided that this legend is included on all tape + * media and as a part of the software program in whole or part. Users + * may copy or modify Sun RPC without charge, but are not authorized + * to license or distribute it to anyone else except as part of a product or + * program developed by the user. + * + * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE + * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR + * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE. + * + * Sun RPC is provided with no support and without any obligation on the + * part of Sun Microsystems, Inc. to assist in its use, correction, + * modification or enhancement. + * + * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE + * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC + * OR ANY PART THEREOF. + * + * In no event will Sun Microsystems, Inc. be liable for any lost revenue + * or profits or other special, indirect and consequential damages, even if + * Sun has been advised of the possibility of such damages. + * + * Sun Microsystems, Inc. + * 2550 Garcia Avenue + * Mountain View, California 94043 + */ +/* + * xdr_sizeof.c + * + * Copyright 1990 Sun Microsystems, Inc. + * + * General purpose routine to see how much space something will use + * when serialized using XDR. + */ + +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +#include <sys/param.h> +#include <sys/systm.h> +#include <sys/malloc.h> + +#include <rpc/types.h> +#include <rpc/xdr.h> + +/* ARGSUSED */ +static bool_t +x_putlong(XDR *xdrs, const long *longp) +{ + + xdrs->x_handy += BYTES_PER_XDR_UNIT; + return (TRUE); +} + +/* ARGSUSED */ +static bool_t +x_putbytes(XDR *xdrs, const char *bp, u_int len) +{ + + xdrs->x_handy += len; + return (TRUE); +} + +static u_int +x_getpostn(XDR *xdrs) +{ + + return (xdrs->x_handy); +} + +/* ARGSUSED */ +static bool_t +x_setpostn(XDR *xdrs, u_int pos) +{ + + /* This is not allowed */ + return (FALSE); +} + +static int32_t * +x_inline(XDR *xdrs, u_int len) +{ + + if (len == 0) { + return (NULL); + } + if (xdrs->x_op != XDR_ENCODE) { + return (NULL); + } + if (len < (u_int)(uintptr_t)xdrs->x_base) { + /* x_private was already allocated */ + xdrs->x_handy += len; + return ((int32_t *) xdrs->x_private); + } else { + /* Free the earlier space and allocate new area */ + if (xdrs->x_private) + free(xdrs->x_private, M_RPC); + if ((xdrs->x_private = (caddr_t) malloc(len, M_RPC, M_WAITOK)) == NULL) { + xdrs->x_base = 0; + return (NULL); + } + xdrs->x_base = (caddr_t)(uintptr_t) len; + xdrs->x_handy += len; + return ((int32_t *) xdrs->x_private); + } +} + +static int +harmless(void) +{ + + /* Always return FALSE/NULL, as the case may be */ + return (0); +} + +static void +x_destroy(XDR *xdrs) +{ + + xdrs->x_handy = 0; + xdrs->x_base = 0; + if (xdrs->x_private) { + free(xdrs->x_private, M_RPC); + xdrs->x_private = NULL; + } + return; +} + +unsigned long +xdr_sizeof(xdrproc_t func, void *data) +{ + XDR x; + struct xdr_ops ops; + bool_t stat; + /* to stop ANSI-C compiler from complaining */ + typedef bool_t (* dummyfunc1)(XDR *, long *); + typedef bool_t (* dummyfunc2)(XDR *, caddr_t, u_int); + + ops.x_putlong = x_putlong; + ops.x_putbytes = x_putbytes; + ops.x_inline = x_inline; + ops.x_getpostn = x_getpostn; + ops.x_setpostn = x_setpostn; + ops.x_destroy = x_destroy; + + /* the other harmless ones */ + ops.x_getlong = (dummyfunc1) harmless; + ops.x_getbytes = (dummyfunc2) harmless; + + x.x_op = XDR_ENCODE; + x.x_ops = &ops; + x.x_handy = 0; + x.x_private = (caddr_t) NULL; + x.x_base = (caddr_t) 0; + + stat = func(&x, data); + if (x.x_private) + free(x.x_private, M_RPC); + return (stat == TRUE ? (unsigned) x.x_handy: 0); +} |