diff options
Diffstat (limited to 'REORG.TODO/sunrpc/xdr_float.c')
| -rw-r--r-- | REORG.TODO/sunrpc/xdr_float.c | 300 |
1 files changed, 300 insertions, 0 deletions
diff --git a/REORG.TODO/sunrpc/xdr_float.c b/REORG.TODO/sunrpc/xdr_float.c new file mode 100644 index 0000000000..844a96e56e --- /dev/null +++ b/REORG.TODO/sunrpc/xdr_float.c @@ -0,0 +1,300 @@ +/* + * xdr_float.c, Generic XDR routines implementation. + * + * Copyright (c) 2010, Oracle America, Inc. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are + * met: + * + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials + * provided with the distribution. + * * Neither the name of the "Oracle America, Inc." nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, + * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE + * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, + * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING + * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + * These are the "floating point" xdr routines used to (de)serialize + * most common data items. See xdr.h for more info on the interface to + * xdr. + */ + +#include <stdio.h> +#include <endian.h> + +#include <rpc/types.h> +#include <rpc/xdr.h> +#include <shlib-compat.h> + +/* + * NB: Not portable. + * This routine works on Suns (Sky / 68000's) and Vaxen. + */ + +#define LSW (__FLOAT_WORD_ORDER == __BIG_ENDIAN) + +#ifdef vax + +/* What IEEE single precision floating point looks like on a Vax */ +struct ieee_single { + unsigned int mantissa: 23; + unsigned int exp : 8; + unsigned int sign : 1; +}; + +/* Vax single precision floating point */ +struct vax_single { + unsigned int mantissa1 : 7; + unsigned int exp : 8; + unsigned int sign : 1; + unsigned int mantissa2 : 16; +}; + +#define VAX_SNG_BIAS 0x81 +#define IEEE_SNG_BIAS 0x7f + +static struct sgl_limits { + struct vax_single s; + struct ieee_single ieee; +} sgl_limits[2] = { + {{ 0x7f, 0xff, 0x0, 0xffff }, /* Max Vax */ + { 0x0, 0xff, 0x0 }}, /* Max IEEE */ + {{ 0x0, 0x0, 0x0, 0x0 }, /* Min Vax */ + { 0x0, 0x0, 0x0 }} /* Min IEEE */ +}; +#endif /* vax */ + +bool_t +xdr_float (XDR *xdrs, float *fp) +{ +#ifdef vax + struct ieee_single is; + struct vax_single vs, *vsp; + struct sgl_limits *lim; + int i; +#endif + switch (xdrs->x_op) { + + case XDR_ENCODE: +#ifdef vax + vs = *((struct vax_single *)fp); + for (i = 0, lim = sgl_limits; + i < sizeof(sgl_limits)/sizeof(struct sgl_limits); + i++, lim++) { + if ((vs.mantissa2 == lim->s.mantissa2) && + (vs.exp == lim->s.exp) && + (vs.mantissa1 == lim->s.mantissa1)) { + is = lim->ieee; + goto shipit; + } + } + is.exp = vs.exp - VAX_SNG_BIAS + IEEE_SNG_BIAS; + is.mantissa = (vs.mantissa1 << 16) | vs.mantissa2; + shipit: + is.sign = vs.sign; + return (XDR_PUTLONG(xdrs, (long *)&is)); +#else + if (sizeof(float) == sizeof(long)) + return (XDR_PUTLONG(xdrs, (long *)fp)); + else if (sizeof(float) == sizeof(int)) { + long tmp = *(int *)fp; + return (XDR_PUTLONG(xdrs, &tmp)); + } + break; +#endif + + case XDR_DECODE: +#ifdef vax + vsp = (struct vax_single *)fp; + if (!XDR_GETLONG(xdrs, (long *)&is)) + return (FALSE); + for (i = 0, lim = sgl_limits; + i < sizeof(sgl_limits)/sizeof(struct sgl_limits); + i++, lim++) { + if ((is.exp == lim->ieee.exp) && + (is.mantissa == lim->ieee.mantissa)) { + *vsp = lim->s; + goto doneit; + } + } + vsp->exp = is.exp - IEEE_SNG_BIAS + VAX_SNG_BIAS; + vsp->mantissa2 = is.mantissa; + vsp->mantissa1 = (is.mantissa >> 16); + doneit: + vsp->sign = is.sign; + return (TRUE); +#else + if (sizeof(float) == sizeof(long)) + return (XDR_GETLONG(xdrs, (long *)fp)); + else if (sizeof(float) == sizeof(int)) { + long tmp; + if (XDR_GETLONG(xdrs, &tmp)) { + *(int *)fp = tmp; + return (TRUE); + } + } + break; +#endif + + case XDR_FREE: + return (TRUE); + } + return (FALSE); +} +libc_hidden_nolink_sunrpc (xdr_float, GLIBC_2_0) + +/* + * This routine works on Suns (Sky / 68000's) and Vaxen. + */ + +#ifdef vax +/* What IEEE double precision floating point looks like on a Vax */ +struct ieee_double { + unsigned int mantissa1 : 20; + unsigned int exp : 11; + unsigned int sign : 1; + unsigned int mantissa2 : 32; +}; + +/* Vax double precision floating point */ +struct vax_double { + unsigned int mantissa1 : 7; + unsigned int exp : 8; + unsigned int sign : 1; + unsigned int mantissa2 : 16; + unsigned int mantissa3 : 16; + unsigned int mantissa4 : 16; +}; + +#define VAX_DBL_BIAS 0x81 +#define IEEE_DBL_BIAS 0x3ff +#define MASK(nbits) ((1 << nbits) - 1) + +static struct dbl_limits { + struct vax_double d; + struct ieee_double ieee; +} dbl_limits[2] = { + {{ 0x7f, 0xff, 0x0, 0xffff, 0xffff, 0xffff }, /* Max Vax */ + { 0x0, 0x7ff, 0x0, 0x0 }}, /* Max IEEE */ + {{ 0x0, 0x0, 0x0, 0x0, 0x0, 0x0}, /* Min Vax */ + { 0x0, 0x0, 0x0, 0x0 }} /* Min IEEE */ +}; + +#endif /* vax */ + + +bool_t +xdr_double (XDR *xdrs, double *dp) +{ +#ifdef vax + struct ieee_double id; + struct vax_double vd; + register struct dbl_limits *lim; + int i; +#endif + + switch (xdrs->x_op) { + + case XDR_ENCODE: +#ifdef vax + vd = *((struct vax_double *)dp); + for (i = 0, lim = dbl_limits; + i < sizeof(dbl_limits)/sizeof(struct dbl_limits); + i++, lim++) { + if ((vd.mantissa4 == lim->d.mantissa4) && + (vd.mantissa3 == lim->d.mantissa3) && + (vd.mantissa2 == lim->d.mantissa2) && + (vd.mantissa1 == lim->d.mantissa1) && + (vd.exp == lim->d.exp)) { + id = lim->ieee; + goto shipit; + } + } + id.exp = vd.exp - VAX_DBL_BIAS + IEEE_DBL_BIAS; + id.mantissa1 = (vd.mantissa1 << 13) | (vd.mantissa2 >> 3); + id.mantissa2 = ((vd.mantissa2 & MASK(3)) << 29) | + (vd.mantissa3 << 13) | + ((vd.mantissa4 >> 3) & MASK(13)); + shipit: + id.sign = vd.sign; + dp = (double *)&id; +#endif + if (2*sizeof(long) == sizeof(double)) { + long *lp = (long *)dp; + return (XDR_PUTLONG(xdrs, lp+!LSW) && + XDR_PUTLONG(xdrs, lp+LSW)); + } else if (2*sizeof(int) == sizeof(double)) { + int *ip = (int *)dp; + long tmp[2]; + tmp[0] = ip[!LSW]; + tmp[1] = ip[LSW]; + return (XDR_PUTLONG(xdrs, tmp) && + XDR_PUTLONG(xdrs, tmp+1)); + } + break; + + case XDR_DECODE: +#ifdef vax + lp = (long *)&id; + if (!XDR_GETLONG(xdrs, lp++) || !XDR_GETLONG(xdrs, lp)) + return (FALSE); + for (i = 0, lim = dbl_limits; + i < sizeof(dbl_limits)/sizeof(struct dbl_limits); + i++, lim++) { + if ((id.mantissa2 == lim->ieee.mantissa2) && + (id.mantissa1 == lim->ieee.mantissa1) && + (id.exp == lim->ieee.exp)) { + vd = lim->d; + goto doneit; + } + } + vd.exp = id.exp - IEEE_DBL_BIAS + VAX_DBL_BIAS; + vd.mantissa1 = (id.mantissa1 >> 13); + vd.mantissa2 = ((id.mantissa1 & MASK(13)) << 3) | + (id.mantissa2 >> 29); + vd.mantissa3 = (id.mantissa2 >> 13); + vd.mantissa4 = (id.mantissa2 << 3); + doneit: + vd.sign = id.sign; + *dp = *((double *)&vd); + return (TRUE); +#else + if (2*sizeof(long) == sizeof(double)) { + long *lp = (long *)dp; + return (XDR_GETLONG(xdrs, lp+!LSW) && + XDR_GETLONG(xdrs, lp+LSW)); + } else if (2*sizeof(int) == sizeof(double)) { + int *ip = (int *)dp; + long tmp[2]; + if (XDR_GETLONG(xdrs, tmp+!LSW) && + XDR_GETLONG(xdrs, tmp+LSW)) { + ip[0] = tmp[0]; + ip[1] = tmp[1]; + return (TRUE); + } + } + break; +#endif + + case XDR_FREE: + return (TRUE); + } + return (FALSE); +} +libc_hidden_nolink_sunrpc (xdr_double, GLIBC_2_0) |