Geant4  10.03
DeflateOutputStreamBuffer.cc
Go to the documentation of this file.
1 // Copyright FreeHEP, 2005.
2 
3 #include "cheprep/DeflateOutputStreamBuffer.h"
4 
9 namespace cheprep {
10 
11  using namespace std;
12 
13  unsigned long DeflateOutputStreamBuffer::crctable[] = {
14  0x00000000L, 0x77073096L, 0xEE0E612CL, 0x990951BAL,
15  0x076DC419L, 0x706AF48FL, 0xE963A535L, 0x9E6495A3L,
16  0x0EDB8832L, 0x79DCB8A4L, 0xE0D5E91EL, 0x97D2D988L,
17  0x09B64C2BL, 0x7EB17CBDL, 0xE7B82D07L, 0x90BF1D91L,
18  0x1DB71064L, 0x6AB020F2L, 0xF3B97148L, 0x84BE41DEL,
19  0x1ADAD47DL, 0x6DDDE4EBL, 0xF4D4B551L, 0x83D385C7L,
20  0x136C9856L, 0x646BA8C0L, 0xFD62F97AL, 0x8A65C9ECL,
21  0x14015C4FL, 0x63066CD9L, 0xFA0F3D63L, 0x8D080DF5L,
22  0x3B6E20C8L, 0x4C69105EL, 0xD56041E4L, 0xA2677172L,
23  0x3C03E4D1L, 0x4B04D447L, 0xD20D85FDL, 0xA50AB56BL,
24  0x35B5A8FAL, 0x42B2986CL, 0xDBBBC9D6L, 0xACBCF940L,
25  0x32D86CE3L, 0x45DF5C75L, 0xDCD60DCFL, 0xABD13D59L,
26  0x26D930ACL, 0x51DE003AL, 0xC8D75180L, 0xBFD06116L,
27  0x21B4F4B5L, 0x56B3C423L, 0xCFBA9599L, 0xB8BDA50FL,
28  0x2802B89EL, 0x5F058808L, 0xC60CD9B2L, 0xB10BE924L,
29  0x2F6F7C87L, 0x58684C11L, 0xC1611DABL, 0xB6662D3DL,
30  0x76DC4190L, 0x01DB7106L, 0x98D220BCL, 0xEFD5102AL,
31  0x71B18589L, 0x06B6B51FL, 0x9FBFE4A5L, 0xE8B8D433L,
32  0x7807C9A2L, 0x0F00F934L, 0x9609A88EL, 0xE10E9818L,
33  0x7F6A0DBBL, 0x086D3D2DL, 0x91646C97L, 0xE6635C01L,
34  0x6B6B51F4L, 0x1C6C6162L, 0x856530D8L, 0xF262004EL,
35  0x6C0695EDL, 0x1B01A57BL, 0x8208F4C1L, 0xF50FC457L,
36  0x65B0D9C6L, 0x12B7E950L, 0x8BBEB8EAL, 0xFCB9887CL,
37  0x62DD1DDFL, 0x15DA2D49L, 0x8CD37CF3L, 0xFBD44C65L,
38  0x4DB26158L, 0x3AB551CEL, 0xA3BC0074L, 0xD4BB30E2L,
39  0x4ADFA541L, 0x3DD895D7L, 0xA4D1C46DL, 0xD3D6F4FBL,
40  0x4369E96AL, 0x346ED9FCL, 0xAD678846L, 0xDA60B8D0L,
41  0x44042D73L, 0x33031DE5L, 0xAA0A4C5FL, 0xDD0D7CC9L,
42  0x5005713CL, 0x270241AAL, 0xBE0B1010L, 0xC90C2086L,
43  0x5768B525L, 0x206F85B3L, 0xB966D409L, 0xCE61E49FL,
44  0x5EDEF90EL, 0x29D9C998L, 0xB0D09822L, 0xC7D7A8B4L,
45  0x59B33D17L, 0x2EB40D81L, 0xB7BD5C3BL, 0xC0BA6CADL,
46  0xEDB88320L, 0x9ABFB3B6L, 0x03B6E20CL, 0x74B1D29AL,
47  0xEAD54739L, 0x9DD277AFL, 0x04DB2615L, 0x73DC1683L,
48  0xE3630B12L, 0x94643B84L, 0x0D6D6A3EL, 0x7A6A5AA8L,
49  0xE40ECF0BL, 0x9309FF9DL, 0x0A00AE27L, 0x7D079EB1L,
50  0xF00F9344L, 0x8708A3D2L, 0x1E01F268L, 0x6906C2FEL,
51  0xF762575DL, 0x806567CBL, 0x196C3671L, 0x6E6B06E7L,
52  0xFED41B76L, 0x89D32BE0L, 0x10DA7A5AL, 0x67DD4ACCL,
53  0xF9B9DF6FL, 0x8EBEEFF9L, 0x17B7BE43L, 0x60B08ED5L,
54  0xD6D6A3E8L, 0xA1D1937EL, 0x38D8C2C4L, 0x4FDFF252L,
55  0xD1BB67F1L, 0xA6BC5767L, 0x3FB506DDL, 0x48B2364BL,
56  0xD80D2BDAL, 0xAF0A1B4CL, 0x36034AF6L, 0x41047A60L,
57  0xDF60EFC3L, 0xA867DF55L, 0x316E8EEFL, 0x4669BE79L,
58  0xCB61B38CL, 0xBC66831AL, 0x256FD2A0L, 0x5268E236L,
59  0xCC0C7795L, 0xBB0B4703L, 0x220216B9L, 0x5505262FL,
60  0xC5BA3BBEL, 0xB2BD0B28L, 0x2BB45A92L, 0x5CB36A04L,
61  0xC2D7FFA7L, 0xB5D0CF31L, 0x2CD99E8BL, 0x5BDEAE1DL,
62  0x9B64C2B0L, 0xEC63F226L, 0x756AA39CL, 0x026D930AL,
63  0x9C0906A9L, 0xEB0E363FL, 0x72076785L, 0x05005713L,
64  0x95BF4A82L, 0xE2B87A14L, 0x7BB12BAEL, 0x0CB61B38L,
65  0x92D28E9BL, 0xE5D5BE0DL, 0x7CDCEFB7L, 0x0BDBDF21L,
66  0x86D3D2D4L, 0xF1D4E242L, 0x68DDB3F8L, 0x1FDA836EL,
67  0x81BE16CDL, 0xF6B9265BL, 0x6FB077E1L, 0x18B74777L,
68  0x88085AE6L, 0xFF0F6A70L, 0x66063BCAL, 0x11010B5CL,
69  0x8F659EFFL, 0xF862AE69L, 0x616BFFD3L, 0x166CCF45L,
70  0xA00AE278L, 0xD70DD2EEL, 0x4E048354L, 0x3903B3C2L,
71  0xA7672661L, 0xD06016F7L, 0x4969474DL, 0x3E6E77DBL,
72  0xAED16A4AL, 0xD9D65ADCL, 0x40DF0B66L, 0x37D83BF0L,
73  0xA9BCAE53L, 0xDEBB9EC5L, 0x47B2CF7FL, 0x30B5FFE9L,
74  0xBDBDF21CL, 0xCABAC28AL, 0x53B39330L, 0x24B4A3A6L,
75  0xBAD03605L, 0xCDD70693L, 0x54DE5729L, 0x23D967BFL,
76  0xB3667A2EL, 0xC4614AB8L, 0x5D681B02L, 0x2A6F2B94L,
77  0xB40BBE37L, 0xC30C8EA1L, 0x5A05DF1BL, 0x2D02EF8DL
78  };
79 
80  DeflateOutputStreamBuffer::DeflateOutputStreamBuffer(streambuf *aBuffer)
81  : buffer(aBuffer)
82  , crc(0)
83  , size(0)
84 #ifndef CHEPREP_NO_ZLIB
85  , zStreamOpen(false)
86  , in(inSize)
87  , out(outSize)
88 #endif // CHEPREP_NO_ZLIB
89  {
90 
91 #ifndef CHEPREP_NO_ZLIB
92  zStream.zalloc = Z_NULL;
93  zStream.zfree = Z_NULL;
94  zStream.opaque = Z_NULL;
95  zStream.msg = 0;
96  zStream.next_in = 0;
97  zStream.next_out = 0;
98  zStream.state = 0;
99 #endif // CHEPREP_NO_ZLIB
100  }
101 
102 #ifndef CHEPREP_NO_ZLIB
103  void DeflateOutputStreamBuffer::init(bool compress) {
104 
105  if (compress) {
106  if (zStreamOpen) return;
107 
108  zStream.next_in = reinterpret_cast<unsigned char *>(&(in[0]));
109  zStream.avail_in = 0 ;
110 
111  zStream.next_out = reinterpret_cast<unsigned char *>(&(out[0]));
112  zStream.avail_out = out.size();
113 
114  if (deflateInit2(&zStream, 6, Z_DEFLATED, -MAX_WBITS, 8, Z_DEFAULT_STRATEGY ) != Z_OK) {
115  cerr << "ERROR: deflateInit2 failed" << endl;
116  } else {
117  zStreamOpen = true;
118  setp(&(in[0]), &(in[0])+inSize);
119  }
120  }
121 #else
122  void DeflateOutputStreamBuffer::init(bool /*compress*/) {
123 #endif // CHEPREP_NO_ZLIB
124 
125  crc = 0;
126  size = 0;
127  }
128 
129  void DeflateOutputStreamBuffer::finish() {
130 
131 #ifndef CHEPREP_NO_ZLIB
132  if (zStreamOpen) {
133 
134  overflow() ;
135 
136  zStream.next_out = reinterpret_cast<unsigned char *>(&(out[0]));
137  zStream.avail_out = outSize;
138 
139  int err = Z_OK ;
140  while ( err == Z_OK ) {
141  if (zStream.avail_out == 0) {
142  flushOut();
143  }
144  err = deflate(&zStream, Z_FINISH);
145  }
146 
147  flushOut() ;
148 
149  if (err != Z_STREAM_END) {
150  cerr << "ERROR: deflation failed" << endl;
151  }
152 
153  if (deflateEnd(&zStream) != Z_OK) {
154  cerr << "ERROR: deflateEnd failed" << endl;
155  }
156 
157  zStreamOpen = false ;
158  }
159 #endif // CHEPREP_NO_ZLIB
160  }
161 
162  DeflateOutputStreamBuffer::~DeflateOutputStreamBuffer() {
163  }
164 
165 
166 #ifndef CHEPREP_NO_ZLIB
167  #define DO1 crc = crctable[(crc ^ (*buf++)) & 0xff] ^ (crc >> 8)
168  #define DO8 DO1; DO1; DO1; DO1; DO1; DO1; DO1; DO1
169 #endif // CHEPREP_NO_ZLIB
170 
171 
172  int DeflateOutputStreamBuffer::overflow(int c) {
173 
174 #ifndef CHEPREP_NO_ZLIB
175  if (zStreamOpen) {
176  zStream.avail_in = pptr() - pbase() ;
177  zStream.next_in = reinterpret_cast<unsigned char *>(&(in[0]));
178 
179  int len = zStream.avail_in;
180  unsigned char* buf = zStream.next_in;
181 
182  crc = crc ^ 0xffffffffUL;
183  while (len >= 8) {
184  DO8;
185  len -= 8;
186  }
187  if (len) do {
188  DO1;
189  } while (--len);
190  crc = crc ^ 0xffffffffUL;
191 
192  size += zStream.avail_in;
193 
194  zStream.next_out = reinterpret_cast<unsigned char *>(&(out[0]));
195  zStream.avail_out = outSize ;
196 
197  int err = Z_OK ;
198  while ((zStream.avail_in > 0 || zStream.avail_out == 0) && err == Z_OK) {
199  if (zStream.avail_out == 0 ) {
200  flushOut();
201  }
202  err = deflate(&zStream, Z_NO_FLUSH);
203  }
204 
205  flushOut();
206 
207  setp(&(in[0]), &(in[0]) + inSize);
208 
209  if ((err != Z_OK) && (err != Z_STREAM_END)) {
210  cerr << "ERROR: deflation failed" << endl;
211  return EOF ;
212  }
213 
214  if ( c != EOF ) {
215  *pptr() = c ;
216  pbump(1);
217  }
218 
219  return 0 ;
220  } else {
221 #endif // CHEPREP_NO_ZLIB
222  crc = crc ^ 0xffffffffUL;
223  crc = crctable[(crc ^ c) & 0xff] ^ (crc >> 8);
224  crc = crc ^ 0xffffffffUL;
225  size++;
226  return buffer->sputc((char)c);
227 #ifndef CHEPREP_NO_ZLIB
228  }
229 #endif // CHEPREP_NO_ZLIB
230  }
231 
232 
233 #ifndef CHEPREP_NO_ZLIB
234  bool DeflateOutputStreamBuffer::flushOut() {
235  int deflatedCount = outSize - zStream.avail_out;
236  int byteCount = buffer->sputn(&(out[0]), deflatedCount);
237 
238  zStream.next_out = reinterpret_cast<unsigned char *>(&(out[0]));
239  zStream.avail_out = outSize ;
240 
241  return deflatedCount == byteCount ;
242  }
243 #endif // CHEPREP_NO_ZLIB
244 
245 } // cheprep
int ZEXPORT deflateEnd(z_streamp strm)
Definition: deflate.cc:939
#define buffer
Definition: xmlparse.cc:628
int ZEXPORT deflate(z_streamp strm, int flush)
Definition: deflate.cc:627
int ZEXPORT compress(Bytef *dest, uLongf *destLen, const Bytef *source, uLong sourceLen)
Definition: compress.cc:57
static constexpr double L
Definition: G4SIunits.hh:124