1 jim.wunderlich 1.1 //%2005////////////////////////////////////////////////////////////////////////
2 //
3 // Copyright (c) 2000, 2001, 2002 BMC Software; Hewlett-Packard Development
4 // Company, L.P.; IBM Corp.; The Open Group; Tivoli Systems.
5 // Copyright (c) 2003 BMC Software; Hewlett-Packard Development Company, L.P.;
6 // IBM Corp.; EMC Corporation, The Open Group.
7 // Copyright (c) 2004 BMC Software; Hewlett-Packard Development Company, L.P.;
8 // IBM Corp.; EMC Corporation; VERITAS Software Corporation; The Open Group.
9 // Copyright (c) 2005 Hewlett-Packard Development Company, L.P.; IBM Corp.;
10 // EMC Corporation; VERITAS Software Corporation; The Open Group.
11 //
12 // Permission is hereby granted, free of charge, to any person obtaining a copy
13 // of this software and associated documentation files (the "Software"), to
14 // deal in the Software without restriction, including without limitation the
15 // rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
16 // sell copies of the Software, and to permit persons to whom the Software is
17 // furnished to do so, subject to the following conditions:
18 //
19 // THE ABOVE COPYRIGHT NOTICE AND THIS PERMISSION NOTICE SHALL BE INCLUDED IN
20 // ALL COPIES OR SUBSTANTIAL PORTIONS OF THE SOFTWARE. THE SOFTWARE IS PROVIDED
21 // "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT
22 jim.wunderlich 1.1 // LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
23 // PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
24 // HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
25 // ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
26 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
27 //
28 //==============================================================================
29 //
30 // Author: Michael E. Brasher
31 //
32 //%/////////////////////////////////////////////////////////////////////////////
33
34 #ifndef _Pegasus_Common_Packer_h
35 #define _Pegasus_Common_Packer_h
36
37 #include <cassert>
38 #include <Pegasus/Common/Config.h>
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39 david.dillard 1.2 #include <Pegasus/Common/ArrayInternal.h>
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40 jim.wunderlich 1.1 #include <Pegasus/Common/String.h>
41
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42 mike 1.2.2.2 #define PACKER_ASSERT(X) /* empty */
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43 jim.wunderlich 1.1
44 PEGASUS_NAMESPACE_BEGIN
45
46 /** This class packs the basic CIM data types into an array of characters.
47 The elements are packed in a binary big-endian format. This class also
48 provides unpacking functions as well.
49
50 <p>
51 This class is for internal use only.
52 */
53 class PEGASUS_COMMON_LINKAGE Packer
54 {
55 public:
56
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57 mike 1.2.2.1 static void packBoolean(Buffer& out, Boolean x);
58 static void packUint8(Buffer& out, Uint8 x);
59 static void packUint16(Buffer& out, Uint16 x);
60 static void packUint32(Buffer& out, Uint32 x);
61 static void packUint64(Buffer& out, Uint64 x);
62 static void packReal32(Buffer& out, Real32 x);
63 static void packReal64(Buffer& out, Real64 x);
64 static void packChar16(Buffer& out, Char16 x);
65 static void packString(Buffer& out, const String& x);
66 static void packSize(Buffer& out, Uint32 x);
67
68 static void packBoolean(Buffer& out, const Boolean* x, Uint32 n);
69 static void packUint8(Buffer& out, const Uint8* x, Uint32 n);
70 static void packUint16(Buffer& out, const Uint16* x, Uint32 n);
71 static void packUint32(Buffer& out, const Uint32* x, Uint32 n);
72 static void packUint64(Buffer& out, const Uint64* x, Uint32 n);
73 static void packReal32(Buffer& out, const Real32* x, Uint32 n);
74 static void packReal64(Buffer& out, const Real64* x, Uint32 n);
75 static void packChar16(Buffer& out, const Char16* x, Uint32 n);
76 static void packString(Buffer& out, const String* x, Uint32 n);
77
78 mike 1.2.2.1 static void unpackBoolean(const Buffer& in, Uint32& pos, Boolean& x);
79 static void unpackUint8(const Buffer& in, Uint32& pos, Uint8& x);
80 static void unpackUint16(const Buffer& in, Uint32& pos, Uint16& x);
81 static void unpackUint32(const Buffer& in, Uint32& pos, Uint32& x);
82 static void unpackUint64(const Buffer& in, Uint32& pos, Uint64& x);
83 static void unpackReal32(const Buffer& in, Uint32& pos, Real32& x);
84 static void unpackReal64(const Buffer& in, Uint32& pos, Real64& x);
85 static void unpackChar16(const Buffer& in, Uint32& pos, Char16& x);
86 static void unpackString(const Buffer& in, Uint32& pos, String& x);
87 static void unpackSize(const Buffer& out, Uint32& pos, Uint32& x);
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88 jim.wunderlich 1.1
89 static void unpackBoolean(
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90 mike 1.2.2.1 Buffer& in, Uint32& pos, Boolean* x, Uint32 n);
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91 jim.wunderlich 1.1 static void unpackUint8(
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92 mike 1.2.2.1 Buffer& in, Uint32& pos, Uint8* x, Uint32 n);
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93 jim.wunderlich 1.1 static void unpackUint16(
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94 mike 1.2.2.1 Buffer& in, Uint32& pos, Uint16* x, Uint32 n);
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95 jim.wunderlich 1.1 static void unpackUint32(
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96 mike 1.2.2.1 Buffer& in, Uint32& pos, Uint32* x, Uint32 n);
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97 jim.wunderlich 1.1 static void unpackUint64(
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98 mike 1.2.2.1 Buffer& in, Uint32& pos, Uint64* x, Uint32 n);
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99 jim.wunderlich 1.1 static void unpackReal32(
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100 mike 1.2.2.1 Buffer& in, Uint32& pos, Real32* x, Uint32 n);
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101 jim.wunderlich 1.1 static void unpackReal64(
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102 mike 1.2.2.1 Buffer& in, Uint32& pos, Real64* x, Uint32 n);
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103 jim.wunderlich 1.1 static void unpackChar16(
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104 mike 1.2.2.1 Buffer& in, Uint32& pos, Char16* x, Uint32 n);
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105 jim.wunderlich 1.1 static void unpackString(
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106 mike 1.2.2.1 Buffer& in, Uint32& pos, String* x, Uint32 n);
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107 jim.wunderlich 1.1
108 static bool isLittleEndian();
109
110 static Uint16 swapUint16(Uint16 x);
111 static Uint32 swapUint32(Uint32 x);
112 static Uint64 swapUint64(Uint64 x);
113
114 static Uint16 swap(Uint16 x) { return swapUint16(x); }
115 static Uint32 swap(Uint32 x) { return swapUint32(x); }
116 static Uint64 swap(Uint64 x) { return swapUint64(x); }
117
118 static void swap(Uint8& x, Uint8& y);
119 };
120
121 inline bool Packer::isLittleEndian()
122 {
123 #if defined(PEGASUS_PLATFORM_LINUX_IA64_GNU)
124 return true;
125 #elif defined(PEGASUS_PLATFORM_LINUX_X86_GNU)
126 return true;
127 #else
128 jim.wunderlich 1.1 // You can add your platform above to avoid this calculation.
129 union U { Uint16 x; Uint8 a[2]; } u;
130 u.x = 1;
131 return u.a[0] == 1;
132 #endif
133 }
134
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135 mike 1.2.2.1 inline void Packer::packBoolean(Buffer& out, Boolean x_)
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136 jim.wunderlich 1.1 {
137 Uint8 x = Uint8(x_);
138 out.append((char*)&x, sizeof(x));
139 }
140
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141 mike 1.2.2.1 inline void Packer::packUint8(Buffer& out, Uint8 x)
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142 jim.wunderlich 1.1 {
143 out.append((char*)&x, sizeof(x));
144 }
145
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146 mike 1.2.2.1 inline void Packer::packUint16(Buffer& out, Uint16 x)
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147 jim.wunderlich 1.1 {
148 if (isLittleEndian())
149 x = Packer::swapUint16(x);
150
151 out.append((char*)&x, sizeof(x));
152 }
153
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154 mike 1.2.2.1 inline void Packer::packUint32(Buffer& out, Uint32 x)
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155 jim.wunderlich 1.1 {
156 if (isLittleEndian())
157 x = Packer::swapUint32(x);
158
159 out.append((char*)&x, sizeof(x));
160 }
161
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162 mike 1.2.2.1 inline void Packer::packUint64(Buffer& out, Uint64 x)
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163 jim.wunderlich 1.1 {
164 if (isLittleEndian())
165 x = Packer::swapUint64(x);
166
167 out.append((char*)&x, sizeof(x));
168 }
169
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170 mike 1.2.2.1 inline void Packer::packReal32(Buffer& out, Real32 x)
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171 jim.wunderlich 1.1 {
172 packUint32(out, *((Uint32*)&x));
173 }
174
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175 mike 1.2.2.1 inline void Packer::packReal64(Buffer& out, Real64 x)
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176 jim.wunderlich 1.1 {
177 packUint64(out, *((Uint64*)&x));
178 }
179
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180 mike 1.2.2.1 inline void Packer::packChar16(Buffer& out, Char16 x)
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181 jim.wunderlich 1.1 {
182 packUint16(out, Uint16(x));
183 }
184
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185 mike 1.2.2.1 inline void Packer::packReal32(Buffer& out, const Real32* x, Uint32 n)
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186 jim.wunderlich 1.1 {
187 Packer::packUint32(out, (const Uint32*)x, n);
188 }
189
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190 mike 1.2.2.1 inline void Packer::packReal64(Buffer& out, const Real64* x, Uint32 n)
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191 jim.wunderlich 1.1 {
192 Packer::packUint64(out, (const Uint64*)x, n);
193 }
194
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195 mike 1.2.2.1 inline void Packer::packChar16(Buffer& out, const Char16* x, Uint32 n)
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196 jim.wunderlich 1.1 {
197 Packer::packUint16(out, (const Uint16*)x, n);
198 }
199
200 inline void Packer::unpackBoolean(
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201 mike 1.2.2.1 const Buffer& in, Uint32& pos, Boolean& x)
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202 jim.wunderlich 1.1 {
203 x = in[pos++] ? true : false;
204 PACKER_ASSERT(pos <= in.size());
205 }
206
207 inline void Packer::unpackUint8(
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208 mike 1.2.2.1 const Buffer& in, Uint32& pos, Uint8& x)
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209 jim.wunderlich 1.1 {
210 x = Uint8(in[pos++]);
211 PACKER_ASSERT(pos <= in.size());
212 }
213
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214 mike 1.2.2.1 inline void Packer::unpackReal32(const Buffer& in, Uint32& pos, Real32& x)
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215 jim.wunderlich 1.1 {
216 Packer::unpackUint32(in, pos, *((Uint32*)&x));
217 PACKER_ASSERT(pos <= in.size());
218 }
219
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220 mike 1.2.2.1 inline void Packer::unpackReal64(const Buffer& in, Uint32& pos, Real64& x)
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221 jim.wunderlich 1.1 {
222 Packer::unpackUint64(in, pos, *((Uint64*)&x));
223 PACKER_ASSERT(pos <= in.size());
224 }
225
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226 mike 1.2.2.1 inline void Packer::unpackChar16(const Buffer& in, Uint32& pos, Char16& x)
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227 jim.wunderlich 1.1 {
228 Packer::unpackUint16(in, pos, *((Uint16*)&x));
229 PACKER_ASSERT(pos <= in.size());
230 }
231
232 inline void Packer::unpackReal32(
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233 mike 1.2.2.1 Buffer& in, Uint32& pos, Real32* x, Uint32 n)
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234 jim.wunderlich 1.1 {
235 unpackUint32(in, pos, (Uint32*)x, n);
236 PACKER_ASSERT(pos <= in.size());
237 }
238
239 inline void Packer::unpackReal64(
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240 mike 1.2.2.1 Buffer& in, Uint32& pos, Real64* x, Uint32 n)
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241 jim.wunderlich 1.1 {
242 unpackUint64(in, pos, (Uint64*)x, n);
243 PACKER_ASSERT(pos <= in.size());
244 }
245
246 inline void Packer::unpackChar16(
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247 mike 1.2.2.1 Buffer& in, Uint32& pos, Char16* x, Uint32 n)
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248 jim.wunderlich 1.1 {
249 unpackUint16(in, pos, (Uint16*)x, n);
250 PACKER_ASSERT(pos <= in.size());
251 }
252
253 inline Uint16 Packer::swapUint16(Uint16 x)
254 {
255 return (Uint16)(
256 (((Uint16)(x) & 0x00ffU) << 8) |
257 (((Uint16)(x) & 0xff00U) >> 8));
258 }
259
260 inline Uint32 Packer::swapUint32(Uint32 x)
261 {
262 return (Uint32)(
263 (((Uint32)(x) & 0x000000ffUL) << 24) |
264 (((Uint32)(x) & 0x0000ff00UL) << 8) |
265 (((Uint32)(x) & 0x00ff0000UL) >> 8) |
266 (((Uint32)(x) & 0xff000000UL) >> 24));
267 }
268
269 jim.wunderlich 1.1 inline void Packer::swap(Uint8& x, Uint8& y)
270 {
271 Uint8 t = x;
272 x = y;
273 y = t;
274 }
275
276 inline Uint64 Packer::swapUint64(Uint64 x)
277 {
278 union
279 {
280 Uint64 x;
281 Uint8 bytes[8];
282 }
283 u;
284
285 u.x = x;
286 Packer::swap(u.bytes[0], u.bytes[7]);
287 Packer::swap(u.bytes[1], u.bytes[6]);
288 Packer::swap(u.bytes[2], u.bytes[5]);
289 Packer::swap(u.bytes[3], u.bytes[4]);
290 jim.wunderlich 1.1 return u.x;
291 }
292
293 PEGASUS_NAMESPACE_END
294
295 #endif /* _Pegasus_Common_Packer_h */
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