1 /* @(#)xdr_float.c 2.1 88/07/29 4.0 RPCSRC */
2 /*
3 * Copyright (c) 2010, Oracle America, Inc.
4 *
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions are met:
9 *
10 * * Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 *
13 * * Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in
15 * the documentation and/or other materials provided with the
16 * distribution.
17 *
18 * * Neither the name of the "Oracle America, Inc." nor the names of
19 * its contributors may be used to endorse or promote products
20 * derived from this software without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
23 * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
24 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
25 * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
26 * HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
27 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
28 * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
29 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
30 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
31 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
32 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
33 */
34 #if !defined(lint) && defined(SCCSIDS)
35 static char sccsid[] = "@(#)xdr_float.c 1.12 87/08/11 Copyr 1984 Sun Micro";
36 #endif
37
38 /*
39 * xdr_float.c, Generic XDR routines impelmentation.
40 *
41 * These are the "floating point" xdr routines used to (de)serialize
42 * most common data items. See xdr.h for more info on the interface to
43 * xdr.
44 */
45
46 #include <stdio.h>
47
48 #include <gssrpc/types.h>
49 #include <gssrpc/xdr.h>
50
51 /*
52 * NB: Not portable.
53 * This routine works on Suns (Sky / 68000's) and Vaxen.
54 */
55 #ifdef IGNORE
56
57 #ifdef vax
58
59 /* What IEEE single precision floating point looks like on a Vax */
60 struct ieee_single {
61 unsigned int mantissa: 23;
62 unsigned int exp : 8;
63 unsigned int sign : 1;
64 };
65
66 /* Vax single precision floating point */
67 struct vax_single {
68 unsigned int mantissa1 : 7;
69 unsigned int exp : 8;
70 unsigned int sign : 1;
71 unsigned int mantissa2 : 16;
72 };
73
74 #define VAX_SNG_BIAS 0x81
75 #define IEEE_SNG_BIAS 0x7f
76
77 static struct sgl_limits {
78 struct vax_single s;
79 struct ieee_single ieee;
80 } sgl_limits[2] = {
81 {{ 0x7f, 0xff, 0x0, 0xffff }, /* Max Vax */
82 { 0x0, 0xff, 0x0 }}, /* Max IEEE */
83 {{ 0x0, 0x0, 0x0, 0x0 }, /* Min Vax */
84 { 0x0, 0x0, 0x0 }} /* Min IEEE */
85 };
86 #endif /* vax */
87
88 bool_t
xdr_float(XDR * xdrs,float * fp)89 xdr_float(XDR *xdrs, float *fp)
90 {
91 #if defined(vax)
92 struct ieee_single is;
93 struct vax_single vs, *vsp;
94 struct sgl_limits *lim;
95 int i;
96 #endif
97 long lg;
98
99 switch (xdrs->x_op) {
100
101 case XDR_ENCODE:
102 #if !defined(vax)
103 lg = * (int_32 *) fp;
104 return (XDR_PUTLONG(xdrs, &lg));
105 #else
106 vs = *((struct vax_single *)fp);
107 for (i = 0, lim = sgl_limits;
108 i < sizeof(sgl_limits)/sizeof(struct sgl_limits);
109 i++, lim++) {
110 if ((vs.mantissa2 == lim->s.mantissa2) &&
111 (vs.exp == lim->s.exp) &&
112 (vs.mantissa1 == lim->s.mantissa1)) {
113 is = lim->ieee;
114 goto shipit;
115 }
116 }
117 is.exp = vs.exp - VAX_SNG_BIAS + IEEE_SNG_BIAS;
118 is.mantissa = (vs.mantissa1 << 16) | vs.mantissa2;
119 shipit:
120 is.sign = vs.sign;
121 return (XDR_PUTLONG(xdrs, (int32_t *)&is));
122 #endif
123
124 case XDR_DECODE:
125 #if !defined(vax)
126 if (!(XDR_GETLONG(xdrs, &lg))) {
127 return (FALSE);
128 }
129 *fp = (float) ((int) lg);
130 return (TRUE);
131 #else
132 vsp = (struct vax_single *)fp;
133 if (!XDR_GETLONG(xdrs, (int32_t *)&is))
134 return (FALSE);
135 for (i = 0, lim = sgl_limits;
136 i < sizeof(sgl_limits)/sizeof(struct sgl_limits);
137 i++, lim++) {
138 if ((is.exp == lim->ieee.exp) &&
139 (is.mantissa == lim->ieee.mantissa)) {
140 *vsp = lim->s;
141 goto doneit;
142 }
143 }
144 vsp->exp = is.exp - IEEE_SNG_BIAS + VAX_SNG_BIAS;
145 vsp->mantissa2 = is.mantissa;
146 vsp->mantissa1 = (is.mantissa >> 16);
147 doneit:
148 vsp->sign = is.sign;
149 return (TRUE);
150 #endif
151
152 case XDR_FREE:
153 return (TRUE);
154 }
155 return (FALSE);
156 }
157
158 /*
159 * This routine works on Suns (Sky / 68000's) and Vaxen.
160 */
161
162 #ifdef vax
163 /* What IEEE double precision floating point looks like on a Vax */
164 struct ieee_double {
165 unsigned int mantissa1 : 20;
166 unsigned int exp : 11;
167 unsigned int sign : 1;
168 unsigned int mantissa2 : 32;
169 };
170
171 /* Vax double precision floating point */
172 struct vax_double {
173 unsigned int mantissa1 : 7;
174 unsigned int exp : 8;
175 unsigned int sign : 1;
176 unsigned int mantissa2 : 16;
177 unsigned int mantissa3 : 16;
178 unsigned int mantissa4 : 16;
179 };
180
181 #define VAX_DBL_BIAS 0x81
182 #define IEEE_DBL_BIAS 0x3ff
183 #define MASK(nbits) ((1 << nbits) - 1)
184
185 static struct dbl_limits {
186 struct vax_double d;
187 struct ieee_double ieee;
188 } dbl_limits[2] = {
189 {{ 0x7f, 0xff, 0x0, 0xffff, 0xffff, 0xffff }, /* Max Vax */
190 { 0x0, 0x7ff, 0x0, 0x0 }}, /* Max IEEE */
191 {{ 0x0, 0x0, 0x0, 0x0, 0x0, 0x0}, /* Min Vax */
192 { 0x0, 0x0, 0x0, 0x0 }} /* Min IEEE */
193 };
194
195 #endif /* vax */
196
197
198 bool_t
xdr_double(XDR * xdrs,double * dp)199 xdr_double(XDR *xdrs, double *dp)
200 {
201 int32_t *lp;
202 #if defined(vax)
203 struct ieee_double id;
204 struct vax_double vd;
205 struct dbl_limits *lim;
206 int i;
207 #endif
208
209 switch (xdrs->x_op) {
210
211 case XDR_ENCODE:
212 #if !defined(vax)
213 lp = (int32_t *)dp;
214 if (sizeof(int32_t) == sizeof(long)) {
215 return (XDR_PUTLONG(xdrs, lp++) && XDR_PUTLONG(xdrs, lp));
216 } else {
217 long lg1 = *lp++;;
218 long lg2 = *lp;
219 return (XDR_PUTLONG(xdrs, &lg1) && XDR_PUTLONG(xdrs, &lg2));
220 }
221 #else
222 vd = *((struct vax_double *)dp);
223 for (i = 0, lim = dbl_limits;
224 i < sizeof(dbl_limits)/sizeof(struct dbl_limits);
225 i++, lim++) {
226 if ((vd.mantissa4 == lim->d.mantissa4) &&
227 (vd.mantissa3 == lim->d.mantissa3) &&
228 (vd.mantissa2 == lim->d.mantissa2) &&
229 (vd.mantissa1 == lim->d.mantissa1) &&
230 (vd.exp == lim->d.exp)) {
231 id = lim->ieee;
232 goto shipit;
233 }
234 }
235 id.exp = vd.exp - VAX_DBL_BIAS + IEEE_DBL_BIAS;
236 id.mantissa1 = (vd.mantissa1 << 13) | (vd.mantissa2 >> 3);
237 id.mantissa2 = ((vd.mantissa2 & MASK(3)) << 29) |
238 (vd.mantissa3 << 13) |
239 ((vd.mantissa4 >> 3) & MASK(13));
240 shipit:
241 id.sign = vd.sign;
242 lp = (int32_t *)&id;
243 return (XDR_PUTLONG(xdrs, lp++) && XDR_PUTLONG(xdrs, lp));
244 #endif
245
246 case XDR_DECODE:
247 #if !defined(vax)
248 lp = (int32_t *)dp;
249 if (sizeof(int32_t) == sizeof(long)) {
250 return (XDR_GETLONG(xdrs, lp++) && XDR_GETLONG(xdrs, lp));
251 } else {
252 long lg1, lg2;
253 bool_t flag =
254 (XDR_GETLONG(xdrs, &lg1) && XDR_GETLONG(xdrs, &lg2));
255 *lp++ = lg1;
256 *lp = lg2;
257 return flag;
258 }
259 #else
260 lp = (int32_t *)&id;
261 if (!XDR_GETLONG(xdrs, lp++) || !XDR_GETLONG(xdrs, lp))
262 return (FALSE);
263 for (i = 0, lim = dbl_limits;
264 i < sizeof(dbl_limits)/sizeof(struct dbl_limits);
265 i++, lim++) {
266 if ((id.mantissa2 == lim->ieee.mantissa2) &&
267 (id.mantissa1 == lim->ieee.mantissa1) &&
268 (id.exp == lim->ieee.exp)) {
269 vd = lim->d;
270 goto doneit;
271 }
272 }
273 vd.exp = id.exp - IEEE_DBL_BIAS + VAX_DBL_BIAS;
274 vd.mantissa1 = (id.mantissa1 >> 13);
275 vd.mantissa2 = ((id.mantissa1 & MASK(13)) << 3) |
276 (id.mantissa2 >> 29);
277 vd.mantissa3 = (id.mantissa2 >> 13);
278 vd.mantissa4 = (id.mantissa2 << 3);
279 doneit:
280 vd.sign = id.sign;
281 *dp = *((double *)&vd);
282 return (TRUE);
283 #endif
284
285 case XDR_FREE:
286 return (TRUE);
287 }
288 return (FALSE);
289 }
290
291 #endif /* IGNORE */
292