1 // ANNA - Anna is Not Nothingness Anymore
3 // (c) Copyright 2005-2014 Eduardo Ramos Testillano & Francisco Ruiz Rayo
5 // http://redmine.teslayout.com/projects/anna-suite
7 // Redistribution and use in source and binary forms, with or without
8 // modification, are permitted provided that the following conditions
11 // * Redistributions of source code must retain the above copyright
12 // notice, this list of conditions and the following disclaimer.
13 // * Redistributions in binary form must reproduce the above
14 // copyright notice, this list of conditions and the following disclaimer
15 // in the documentation and/or other materials provided with the
17 // * Neither the name of the copyright holder nor the names of its
18 // contributors may be used to endorse or promote products derived from
19 // this software without specific prior written permission.
21 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
22 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
23 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
24 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
25 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
26 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
27 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
28 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
29 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
30 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
31 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
33 // Authors: eduardo.ramos.testillano@gmail.com
34 // cisco.tierra@gmail.com
37 #include <arpa/inet.h>
41 #include <anna/core/util/ZBlock.hpp>
47 * El bloque de datos retornoado contiene:
48 * <int que indica el tamaño original del buffer> + buffer comprimido.
50 const DataBlock& ZBlock::compress(const DataBlock& data, const Mode::_v mode)
51 throw(RuntimeException) {
53 throw RuntimeException("ZBlock::compress | Source and target object cannot be the same", ANNA_FILE_LOCATION);
58 * Si la fuente de datos está vacía no hay que hacer nada
60 if((originalSize = data.getSize()) == 0) {
66 * Según la documentación el buffer destino debe ser, como mínimo un 0.1% mayor que el original + 12 bytes
67 * Lo incrementamos en un 1% para simplificar
69 uLong maxSize = sizeof(int) + 12 + originalSize + (originalSize * 101) / 100;
70 DataBlock::allocate(maxSize);
71 char* buffer = (char*) DataBlock::getData();
72 int aux = htonl(originalSize);
73 register char* w((char*) &aux);
74 /* Establece el tamaño original del buffer */
76 buffer [1] = *(w + 1);
77 buffer [2] = *(w + 2);
78 buffer [3] = *(w + 3);
81 if(mode == Mode::Default)
82 rr = ::compress((Bytef*) buffer + sizeof(int), &maxSize, (Bytef*) data.getData(), originalSize);
84 rr = ::compress2((Bytef*) buffer + sizeof(int), &maxSize, (Bytef*) data.getData(), originalSize, mode);
87 string msg("ZBlock::compress | ");
89 throw RuntimeException(msg, ANNA_FILE_LOCATION);
92 DataBlock::setSize((int) maxSize + sizeof(int));
96 const DataBlock& ZBlock::uncompress(const DataBlock& zdata)
97 throw(RuntimeException) {
99 throw RuntimeException("ZBlock::uncompress | Source and target object cannot be the same", ANNA_FILE_LOCATION);
102 * Si la fuente de datos está vacía no hay que hacer nada
104 if(zdata.getSize() < sizeof(int)) {
109 char* buffer = (char*) zdata.getData();
112 register char* w((char*) &aux);
114 *(w + 1) = *(buffer + 1);
115 *(w + 2) = *(buffer + 2);
116 *(w + 3) = *(buffer + 3);
118 DataBlock::allocate((int) size);
119 int rr = ::uncompress((Bytef*) DataBlock::getData(), &size, (const Bytef*) zdata.getData() + sizeof(int), zdata.getSize() - sizeof(int));
122 string msg("ZBlock::uncompress | ");
124 throw RuntimeException(msg, ANNA_FILE_LOCATION);
127 DataBlock::setSize((int) size);