blob: 614f30fea02f1243b87f2147776a5e91008c2e00 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
|
#pragma once
#include <cstdint>
#include <istream>
#include <ostream>
#include <string>
#include <glob.h>
namespace Gudhi_laplacian
{
// FIXME: Read from PETSc headers.
static const int32_t PETSC_MAT_FILE_CLASSID = 1211216;
static const int32_t PETSC_VEC_FILE_CLASSID = 1211214;
bool preexisting_files(const std::string & prefix, const std::string & postfix)
{
glob_t globbuf;
std::string pattern = prefix + std::string(".*.") + postfix;
bool ret = (glob(pattern.c_str(), GLOB_ERR | GLOB_NOSORT, NULL, &globbuf) != GLOB_NOMATCH);
globfree(&globbuf);
return ret;
}
template <typename T> inline void reverse_endianness(T & x)
{
uint8_t * p = reinterpret_cast<uint8_t *>(&x);
std::reverse(p, p + sizeof(T));
}
template <typename T> inline T read_le(std::istream & s)
{
T result;
s.read(reinterpret_cast<char *>(&result), sizeof(T));
#ifdef BIGENDIAN
reverse_endianness(result);
#endif
return result;
}
template <typename T> inline void write_le(std::ostream & s, T value)
{
#ifdef BIGENDIAN
reverse_endianness(value);
#endif
s.write(reinterpret_cast<char *>(&value), sizeof(T));
}
template <typename T> inline T read_be(std::istream & s)
{
T result;
s.read(reinterpret_cast<char *>(&result), sizeof(T));
#ifndef BIGENDIAN
reverse_endianness(result);
#endif
return result;
}
template <typename T> inline void write_be(std::ostream & s, T value)
{
#ifndef BIGENDIAN
reverse_endianness(value);
#endif
s.write(reinterpret_cast<char *>(&value), sizeof(T));
}
}
|
