ARB
ChecksumCollector.h
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1 // ============================================================= //
2 // //
3 // File : ChecksumCollector.h //
4 // Purpose : //
5 // //
6 // Coded by Ralf Westram (coder@reallysoft.de) in March 2012 //
7 // Institute of Microbiology (Technical University Munich) //
8 // http://www.arb-home.de/ //
9 // //
10 // ============================================================= //
11 
12 #ifndef CHECKSUMCOLLECTOR_H
13 #define CHECKSUMCOLLECTOR_H
14 
15 #ifndef _GLIBCXX_VECTOR
16 #include <vector>
17 #endif
18 #ifndef ARBDBT_H
19 #include <arbdbt.h>
20 #endif
21 
22 
24  // helper class to calculate checksums for complex custom data structures
25  //
26  // Derive from this class,
27  // traverse your structure in ctor and
28  // collect() all data members.
29 
30  std::vector<unsigned char> data;
31 
32 protected:
33 
34  void collect_byte(unsigned char c) { data.push_back(c); }
35  void collect_mem(void *v, int len) {
36  const unsigned char *c = (const unsigned char *)v;
37  for (int p = 0; p<len; ++p) {
38  collect_byte(c[p]);
39  }
40  }
41 
42  void collect(unsigned char c) { collect_byte(c); }
43  void collect(char c) { collect_byte(c); }
44  void collect(bool b) { collect_byte(b); }
45 
46  void collect(const float& f) { collect_mem((unsigned char *)&f, sizeof(f)); }
47  void collect(const double& d) { collect_mem((unsigned char *)&d, sizeof(d)); }
48 
49  void collect(const char *s) {
50  if (s) {
51  for (int p = 0; s[p]; ++p) collect_byte(s[p]);
52  collect_byte(0);
53  }
54  else {
55  collect_byte(0);
56  collect_byte(0);
57  }
58  }
59 
60 public:
63 
64  uint32_t checksum() const {
65  size_t size = data.size();
66  unsigned char *buffer = ARB_alloc<unsigned char>(size);
67  for (size_t s = 0; s<size; ++s) buffer[s] = data[s];
68  uint32_t cs = GB_checksum((char*)buffer, size, false, NULp);
69  free(buffer);
70  return cs;
71  }
72 };
73 
74 
75 #else
76 #error ChecksumCollector.h included twice
77 #endif // CHECKSUMCOLLECTOR_H
void collect(char c)
uint32_t GB_checksum(const char *seq, long length, int ignore_case, const char *exclude)
Definition: adstring.cxx:320
char buffer[MESSAGE_BUFFERSIZE]
Definition: seq_search.cxx:34
void collect(const float &f)
void collect(const double &d)
void collect(bool b)
void collect(unsigned char c)
void collect(const char *s)
void collect_mem(void *v, int len)
uint32_t checksum() const
void collect_byte(unsigned char c)
#define NULp
Definition: cxxforward.h:97
GB_write_int const char s
Definition: AW_awar.cxx:156