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1.1 root 1: /*
2: * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
3: *
4: * @APPLE_LICENSE_HEADER_START@
5: *
6: * The contents of this file constitute Original Code as defined in and
7: * are subject to the Apple Public Source License Version 1.1 (the
8: * "License"). You may not use this file except in compliance with the
9: * License. Please obtain a copy of the License at
10: * http://www.apple.com/publicsource and read it before using this file.
11: *
12: * This Original Code and all software distributed under the License are
13: * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
14: * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
15: * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
16: * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
17: * License for the specific language governing rights and limitations
18: * under the License.
19: *
20: * @APPLE_LICENSE_HEADER_END@
21: */
22: /*
23: * Copyright (c) 1996 NeXT Software, Inc.
24: *
25: * Byte ordering conversion (for ppc).
26: *
27: * HISTORY
28: *
29: * 29-Dec-96 Umesh Vaishampayan ([email protected])
30: * Ported from m98k.
31: *
32: * 8 October 1992 ? at NeXT
33: * Converted to NXxxx versions. Condensed history.
34: *
35: * 28 August 1992 Bruce Martin @NeXT
36: * Created.
37: */
38:
39: static __inline__
40: unsigned short
41: NXSwapShort(
42: unsigned short inv
43: )
44: {
45: union sconv {
46: unsigned short us;
47: unsigned char uc[2];
48: } *inp, outv;
49:
50: inp = (union sconv *)&inv;
51:
52: outv.uc[0] = inp->uc[1];
53: outv.uc[1] = inp->uc[0];
54:
55: return (outv.us);
56: }
57:
58: static __inline__
59: unsigned int
60: NXSwapInt(
61: unsigned int inv
62: )
63: {
64: union iconv {
65: unsigned int ui;
66: unsigned char uc[4];
67: } *inp, outv;
68:
69: inp = (union iconv *)&inv;
70:
71: outv.uc[0] = inp->uc[3];
72: outv.uc[1] = inp->uc[2];
73: outv.uc[2] = inp->uc[1];
74: outv.uc[3] = inp->uc[0];
75:
76: return (outv.ui);
77: }
78:
79: static __inline__
80: unsigned long
81: NXSwapLong(
82: unsigned long inv
83: )
84: {
85: union lconv {
86: unsigned long ul;
87: unsigned char uc[4];
88: } *inp, outv;
89:
90: inp = (union lconv *)&inv;
91:
92: outv.uc[0] = inp->uc[3];
93: outv.uc[1] = inp->uc[2];
94: outv.uc[2] = inp->uc[1];
95: outv.uc[3] = inp->uc[0];
96:
97: return (outv.ul);
98: }
99:
100: static __inline__
101: unsigned long long
102: NXSwapLongLong(
103: unsigned long long inv
104: )
105: {
106: union llconv {
107: unsigned long long ull;
108: unsigned char uc[8];
109: } *inp, outv;
110:
111: inp = (union llconv *)&inv;
112:
113: outv.uc[0] = inp->uc[7];
114: outv.uc[1] = inp->uc[6];
115: outv.uc[2] = inp->uc[5];
116: outv.uc[3] = inp->uc[4];
117: outv.uc[4] = inp->uc[3];
118: outv.uc[5] = inp->uc[2];
119: outv.uc[6] = inp->uc[1];
120: outv.uc[7] = inp->uc[0];
121:
122: return (outv.ull);
123: }
124:
125: #ifndef KERNEL
126:
127: static __inline__ NXSwappedFloat
128: NXConvertHostFloatToSwapped(float x)
129: {
130: union fconv {
131: float number;
132: NXSwappedFloat sf;
133: };
134: return ((union fconv *)&x)->sf;
135: }
136:
137: static __inline__ float
138: NXConvertSwappedFloatToHost(NXSwappedFloat x)
139: {
140: union fconv {
141: float number;
142: NXSwappedFloat sf;
143: };
144: return ((union fconv *)&x)->number;
145: }
146:
147: static __inline__ NXSwappedDouble
148: NXConvertHostDoubleToSwapped(double x)
149: {
150: union dconv {
151: double number;
152: NXSwappedDouble sd;
153: };
154: return ((union dconv *)&x)->sd;
155: }
156:
157: static __inline__ double
158: NXConvertSwappedDoubleToHost(NXSwappedDouble x)
159: {
160: union dconv {
161: double number;
162: NXSwappedDouble sd;
163: };
164: return ((union dconv *)&x)->number;
165: }
166:
167: static __inline__ NXSwappedFloat
168: NXSwapFloat(NXSwappedFloat x)
169: {
170: return NXSwapLong(x);
171: }
172:
173: static __inline__ NXSwappedDouble
174: NXSwapDouble(NXSwappedDouble x)
175: {
176: return NXSwapLongLong(x);
177: }
178:
179: #endif /* ! KERNEL */
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