ATLAS Offline Software
TrigDataAccess/TrigSerializeResult/src/StringSerializer.cxx
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1 /*
2  Copyright (C) 2002-2020 CERN for the benefit of the ATLAS collaboration
3 */
4 
5 #include <cstring>
7 const char* const StringSerializer::s_delimiter = "\n";
8 
9 
10 void StringSerializer::serialize (const std::vector<std::string>& strings, std::vector<uint32_t>& storage ) {
11 
12  m_ostream.str(""); // ostream reset
13 
14  // copy strings into m_ostream with delimiter after each element (even after last element)
15  copy(strings.begin(), strings.end(), std::ostream_iterator<std::string>(m_ostream, s_delimiter));
16 
17  /*
18  unsigned int i;
19  for ( i = 0 ; i < strings.size() ; ++i) {
20  std::cerr << "ser: " << strings[i] << std::endl;
21  }
22  */
23 
24  unsigned sizeToReserve = m_ostream.str().size();
25 
26  // Pad with '\n'
27  unsigned int sizeToPad = getPadding(sizeToReserve);
28 
29  if ( sizeToPad != 0 ) {
30  sizeToReserve += sizeToPad;
31  for ( unsigned i = 0 ; i < sizeToPad; i++ )
33  }
34  m_ostream.flush();
35 
36  char * carray = new char [sizeToReserve];
37  strncpy(carray, m_ostream.str().c_str(), sizeToReserve);
38  const uint32_t * uarray = (const uint32_t*) carray;
39 
40  storage.push_back(strings.size()); // put number of strings first
41  storage.insert(storage.end(), &uarray[0], &uarray[sizeToReserve/sizeof(uint32_t)]);
42 
43  /*
44  std::cerr << "reserved = " << sizeToReserve << ", pad = " << sizeToPad
45  << ", storage size = " << storage.size() << ", serialized: " << std::endl;
46 
47  for ( unsigned int i = 0 ; i < sizeToReserve; ++i ) {
48  std::cerr << " " << std::hex << (int)carray[i] << std::dec << "(" << (char)carray[i] << ")";
49  }
50  std::cerr << " " << std::dec << std::endl;
51  */
52 
53  delete[] carray;
54 
55 }
56 
57 void StringSerializer::serialize (const std::string& str, std::vector<uint32_t>& storage ) {
58  std::vector<std::string> tmp(1, str);
59  return serialize(tmp, storage);
60 }
61 
62 std::size_t StringSerializer::deserialize (std::vector<uint32_t>::const_iterator first,
63  std::vector<uint32_t>::const_iterator last,
64  std::vector<std::string>& strings)
65 {
66  std::size_t storageSize = std::distance(first, last);
67 
68  if ( storageSize <= 1 ) return storageSize;
69  unsigned int numOfStrings = *first;
70 
71  // Copy storage into array of uint32_t
72  uint32_t * uarray = new uint32_t[storageSize-1];
73  std::vector<uint32_t>::const_iterator itBegin = first;
74  advance(itBegin, 1);
75  copy(itBegin, last, &uarray[0]);
76 
77  /*
78  unsigned int i;
79  std::cerr << "deserialized: " << std::endl;
80  for ( i = 0 ; i < storage.size()-1; ++i ) {
81  std::cerr << " " << std::hex << uarray[i] ;
82  }
83  std::cerr << " " << std::dec << std::endl;
84  */
85 
86  const char * carray = (const char*)uarray;
87  std::string whole(carray, (storageSize-1)*sizeof(uint32_t));
88 
89  m_istream.clear(); // istream reset
90  m_istream.str(whole);
91 
92  std::string one;
93  unsigned int readInStrings=0;
94  std::size_t nChars=0;
95 
96  while ( m_istream.good() && readInStrings < numOfStrings ) {
97  getline(m_istream, one, s_delimiter[0]);
98  strings.push_back(one);
99  readInStrings++;
100  nChars += one.size() + 1;
101  }
102  delete[] uarray;
103 
104  return 1 + (nChars+getPadding(nChars))/sizeof(uint32_t); // # uint32_t words (incl. header)
105 }
106 
107 std::size_t StringSerializer::deserialize (std::vector<uint32_t>::const_iterator first,
108  std::vector<uint32_t>::const_iterator last,
109  std::string& str)
110 {
111  std::vector<std::string> tmp;
112  std::size_t nWords = deserialize(first, last, tmp);
113  if (tmp.size() == 1 )
114  str = tmp[0];
115 
116  return nWords;
117 }
118 
119 unsigned int StringSerializer::inquireSize(const std::vector<uint32_t>& storage) {
120  if ( storage.size() <= 1 )
121  return 0;
122  return storage[0];
123 }
124 
xAOD::uint32_t
setEventNumber uint32_t
Definition: EventInfo_v1.cxx:127
Trk::one
@ one
Definition: TrkDetDescr/TrkSurfaces/TrkSurfaces/RealQuadraticEquation.h:22
StringSerializer::serialize
void serialize(const std::vector< std::string > &strings, std::vector< uint32_t > &storage)
Serializes vector of strings into vector of integers.
Definition: TrigDataAccess/TrigSerializeResult/src/StringSerializer.cxx:10
StringSerializer::m_istream
std::istringstream m_istream
sstream used in de-serialization
Definition: TrigDataAccess/TrigSerializeResult/TrigSerializeResult/StringSerializer.h:85
lumiFormat.i
int i
Definition: lumiFormat.py:85
StringSerializer::m_ostream
std::ostringstream m_ostream
sstream used in serialization
Definition: TrigDataAccess/TrigSerializeResult/TrigSerializeResult/StringSerializer.h:84
StringSerializer::deserialize
std::size_t deserialize(std::vector< uint32_t >::const_iterator first, std::vector< uint32_t >::const_iterator last, std::vector< std::string > &strings)
Deserialize vector into strings.
Definition: TrigDataAccess/TrigSerializeResult/src/StringSerializer.cxx:62
DeMoUpdate.tmp
string tmp
Definition: DeMoUpdate.py:1167
StringSerializer::s_delimiter
static const char *const s_delimiter
default delimeter which is put between strings from the input vector while serialization happens
Definition: TrigDataAccess/TrigSerializeResult/TrigSerializeResult/StringSerializer.h:86
StringSerializer::inquireSize
unsigned int inquireSize(const std::vector< uint32_t > &storage)
Return number of strings serialized into 'storage'.
Definition: TrigDataAccess/TrigSerializeResult/src/StringSerializer.cxx:119
DeMoScan.first
bool first
Definition: DeMoScan.py:536
str
Definition: BTagTrackIpAccessor.cxx:11
calibdata.copy
bool copy
Definition: calibdata.py:27
Amg::distance
float distance(const Amg::Vector3D &p1, const Amg::Vector3D &p2)
calculates the distance between two point in 3D space
Definition: GeoPrimitivesHelpers.h:54
StringSerializer.h
StringSerializer::getPadding
unsigned int getPadding(unsigned int sizeToReserve)
Get number of padding bytes needed to align with uint32_t.
Definition: TrigDataAccess/TrigSerializeResult/TrigSerializeResult/StringSerializer.h:80