1 thilo.boehm 1.1 //%LICENSE////////////////////////////////////////////////////////////////
2 //
3 // Licensed to The Open Group (TOG) under one or more contributor license
4 // agreements. Refer to the OpenPegasusNOTICE.txt file distributed with
5 // this work for additional information regarding copyright ownership.
6 // Each contributor licenses this file to you under the OpenPegasus Open
7 // Source License; you may not use this file except in compliance with the
8 // License.
9 //
10 // Permission is hereby granted, free of charge, to any person obtaining a
11 // copy of this software and associated documentation files (the "Software"),
12 // to deal in the Software without restriction, including without limitation
13 // the rights to use, copy, modify, merge, publish, distribute, sublicense,
14 // and/or sell copies of the Software, and to permit persons to whom the
15 // Software is furnished to do so, subject to the following conditions:
16 //
17 // The above copyright notice and this permission notice shall be included
18 // in all copies or substantial portions of the Software.
19 //
20 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
21 // OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
22 thilo.boehm 1.1 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
23 // IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
24 // CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
25 // TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
26 // SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
27 //
28 //////////////////////////////////////////////////////////////////////////
29 //
30 //%/////////////////////////////////////////////////////////////////////////////
31
32 #ifndef _Pegasus_Common_Packer_h
33 #define _Pegasus_Common_Packer_h
34
35 #include <Pegasus/Common/PegasusAssert.h>
36 #include <Pegasus/Common/Config.h>
37 #include <Pegasus/Common/ArrayInternal.h>
38 #include <Pegasus/Common/String.h>
39 #include <Pegasus/Common/Buffer.h>
40 #include <Pegasus/Common/PegasusAssert.h>
41
42 PEGASUS_NAMESPACE_BEGIN
43 thilo.boehm 1.1
44 /** This class packs the basic CIM data types into an array of characters.
45 The elements are packed in a binary big-endian format. This class also
46 provides unpacking functions as well.
47
48 <p>
49 This class is for internal use only.
50 */
51 class Packer
52 {
53 public:
54
55 static void packBoolean(Buffer& out, Boolean x);
56 static void packUint8(Buffer& out, Uint8 x);
57 static void packUint16(Buffer& out, Uint16 x);
58 static void packUint32(Buffer& out, Uint32 x);
59 static void packUint64(Buffer& out, Uint64 x);
60 static void packReal32(Buffer& out, Real32 x);
61 static void packReal64(Buffer& out, Real64 x);
62 static void packChar16(Buffer& out, Char16 x);
63 static void packString(Buffer& out, const String& x);
64 thilo.boehm 1.1 static void packSize(Buffer& out, Uint32 x);
65
66 static void packBoolean(Buffer& out, const Boolean* x, Uint32 n);
67 static void packUint8(Buffer& out, const Uint8* x, Uint32 n);
68 static void packUint16(Buffer& out, const Uint16* x, Uint32 n);
69 static void packUint32(Buffer& out, const Uint32* x, Uint32 n);
70 static void packUint64(Buffer& out, const Uint64* x, Uint32 n);
71 static void packReal32(Buffer& out, const Real32* x, Uint32 n);
72 static void packReal64(Buffer& out, const Real64* x, Uint32 n);
73 static void packChar16(Buffer& out, const Char16* x, Uint32 n);
74 static void packString(Buffer& out, const String* x, Uint32 n);
75
76 static void unpackBoolean(const Buffer& in, Uint32& pos, Boolean& x);
77 static void unpackUint8(const Buffer& in, Uint32& pos, Uint8& x);
78 static void unpackUint16(const Buffer& in, Uint32& pos, Uint16& x);
79 static void unpackUint32(const Buffer& in, Uint32& pos, Uint32& x);
80 static void unpackUint64(const Buffer& in, Uint32& pos, Uint64& x);
81 static void unpackReal32(const Buffer& in, Uint32& pos, Real32& x);
82 static void unpackReal64(const Buffer& in, Uint32& pos, Real64& x);
83 static void unpackChar16(const Buffer& in, Uint32& pos, Char16& x);
84 static void unpackString(const Buffer& in, Uint32& pos, String& x);
85 thilo.boehm 1.1 static void unpackSize(const Buffer& out, Uint32& pos, Uint32& x);
86
87 static void unpackBoolean(
88 Buffer& in, Uint32& pos, Boolean* x, Uint32 n);
89 static void unpackUint8(
90 Buffer& in, Uint32& pos, Uint8* x, Uint32 n);
91 static void unpackUint16(
92 Buffer& in, Uint32& pos, Uint16* x, Uint32 n);
93 static void unpackUint32(
94 Buffer& in, Uint32& pos, Uint32* x, Uint32 n);
95 static void unpackUint64(
96 Buffer& in, Uint32& pos, Uint64* x, Uint32 n);
97 static void unpackReal32(
98 Buffer& in, Uint32& pos, Real32* x, Uint32 n);
99 static void unpackReal64(
100 Buffer& in, Uint32& pos, Real64* x, Uint32 n);
101 static void unpackChar16(
102 Buffer& in, Uint32& pos, Char16* x, Uint32 n);
103 static void unpackString(
104 Buffer& in, Uint32& pos, String* x, Uint32 n);
105
106 thilo.boehm 1.1 static bool isLittleEndian();
107
108 static Uint16 swapUint16(Uint16 x);
109 static Uint32 swapUint32(Uint32 x);
110 static Uint64 swapUint64(Uint64 x);
111
112 static Uint16 swap(Uint16 x) { return swapUint16(x); }
113 static Uint32 swap(Uint32 x) { return swapUint32(x); }
114 static Uint64 swap(Uint64 x) { return swapUint64(x); }
115
116 static void swap(Uint8& x, Uint8& y);
117 };
118
119 inline bool Packer::isLittleEndian()
120 {
121 #if defined(PEGASUS_PLATFORM_LINUX_IA64_GNU)
122 return true;
123 #elif defined(PEGASUS_PLATFORM_LINUX_X86_GNU)
124 return true;
125 #elif defined(PEGASUS_OS_ZOS)
126 return false;
127 thilo.boehm 1.1 #else
128 // 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
135 inline void Packer::packBoolean(Buffer& out, Boolean x_)
136 {
137 Uint8 x = Uint8(x_);
138 out.append((char*)&x, sizeof(x));
139 }
140
141 inline void Packer::packUint8(Buffer& out, Uint8 x)
142 {
143 out.append((char*)&x, sizeof(x));
144 }
145
146 inline void Packer::packUint16(Buffer& out, Uint16 x)
147 {
148 thilo.boehm 1.1 if (isLittleEndian())
149 x = Packer::swapUint16(x);
150
151 out.append((char*)&x, sizeof(x));
152 }
153
154 inline void Packer::packUint32(Buffer& out, Uint32 x)
155 {
156 if (isLittleEndian())
157 x = Packer::swapUint32(x);
158
159 out.append((char*)&x, sizeof(x));
160 }
161
162 inline void Packer::packUint64(Buffer& out, Uint64 x)
163 {
164 if (isLittleEndian())
165 x = Packer::swapUint64(x);
166
167 out.append((char*)&x, sizeof(x));
168 }
169 thilo.boehm 1.1
170 inline void Packer::packReal32(Buffer& out, Real32 x)
171 {
172 packUint32(out, *(static_cast<Uint32*>((void*)&x)));
173 }
174
175 inline void Packer::packReal64(Buffer& out, Real64 x)
176 {
177 packUint64(out, *(static_cast<Uint64*>((void*)&x)));
178 }
179
180 inline void Packer::packChar16(Buffer& out, Char16 x)
181 {
182 packUint16(out, Uint16(x));
183 }
184
185 inline void Packer::packReal32(Buffer& out, const Real32* x, Uint32 n)
186 {
187 Packer::packUint32(out, (const Uint32*)x, n);
188 }
189
190 thilo.boehm 1.1 inline void Packer::packReal64(Buffer& out, const Real64* x, Uint32 n)
191 {
192 Packer::packUint64(out, (const Uint64*)x, n);
193 }
194
195 inline void Packer::packChar16(Buffer& out, const Char16* x, Uint32 n)
196 {
197 Packer::packUint16(out, (const Uint16*)x, n);
198 }
199
200 inline void Packer::unpackBoolean(
201 const Buffer& in, Uint32& pos, Boolean& x)
202 {
203 x = in[pos++] ? true : false;
204 PEGASUS_DEBUG_ASSERT(pos <= in.size());
205 }
206
207 inline void Packer::unpackUint8(
208 const Buffer& in, Uint32& pos, Uint8& x)
209 {
210 x = Uint8(in[pos++]);
211 thilo.boehm 1.1 PEGASUS_DEBUG_ASSERT(pos <= in.size());
212 }
213
214 inline void Packer::unpackReal32(const Buffer& in, Uint32& pos, Real32& x)
215 {
216 Packer::unpackUint32(in, pos, *((Uint32*)&x));
217 PEGASUS_DEBUG_ASSERT(pos <= in.size());
218 }
219
220 inline void Packer::unpackReal64(const Buffer& in, Uint32& pos, Real64& x)
221 {
222 Packer::unpackUint64(in, pos, *((Uint64*)&x));
223 PEGASUS_DEBUG_ASSERT(pos <= in.size());
224 }
225
226 inline void Packer::unpackChar16(const Buffer& in, Uint32& pos, Char16& x)
227 {
228 Packer::unpackUint16(in, pos, *((Uint16*)&x));
229 PEGASUS_DEBUG_ASSERT(pos <= in.size());
230 }
231
232 thilo.boehm 1.1 inline void Packer::unpackReal32(
233 Buffer& in, Uint32& pos, Real32* x, Uint32 n)
234 {
235 unpackUint32(in, pos, (Uint32*)x, n);
236 PEGASUS_DEBUG_ASSERT(pos <= in.size());
237 }
238
239 inline void Packer::unpackReal64(
240 Buffer& in, Uint32& pos, Real64* x, Uint32 n)
241 {
242 unpackUint64(in, pos, (Uint64*)x, n);
243 PEGASUS_DEBUG_ASSERT(pos <= in.size());
244 }
245
246 inline void Packer::unpackChar16(
247 Buffer& in, Uint32& pos, Char16* x, Uint32 n)
248 {
249 unpackUint16(in, pos, (Uint16*)x, n);
250 PEGASUS_DEBUG_ASSERT(pos <= in.size());
251 }
252
253 thilo.boehm 1.1 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 inline void Packer::swap(Uint8& x, Uint8& y)
270 {
271 Uint8 t = x;
272 x = y;
273 y = t;
274 thilo.boehm 1.1 }
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 return u.x;
291 }
292
293 PEGASUS_NAMESPACE_END
294
295 thilo.boehm 1.1 #endif /* _Pegasus_Common_Packer_h */
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