blob: d284fdb268c5bb3afdd0a501085d9bdc3bcce671 (
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
|
/* Distributed under the OSI-approved BSD 3-Clause License. See accompanying
file Copyright.txt or https://cmake.org/licensing for details. */
#ifndef cmFileTimeCache_h
#define cmFileTimeCache_h
#include "cmConfigure.h" // IWYU pragma: keep
#include "cmFileTime.h"
#include <string>
#include <unordered_map>
/** \class cmFileTimeCache
* \brief Caches file modification times in an internal map for fast lookups.
*/
class cmFileTimeCache
{
public:
cmFileTimeCache();
~cmFileTimeCache();
cmFileTimeCache(const cmFileTimeCache&) = delete;
cmFileTimeCache& operator=(const cmFileTimeCache&) = delete;
/**
* @brief Loads the file time from the cache or the file system.
* @return true on success
*/
bool Load(std::string const& fileName, cmFileTime& fileTime);
/**
* @brief Compare file modification times.
* @return true for successful comparison and false for error.
*
* When true is returned, result has -1, 0, +1 for
* f1 older, same, or newer than f2.
*/
bool FileTimeCompare(std::string const& f1, std::string const& f2,
int* result);
/**
* @brief Compare file modification times.
* @return true unless both files exist and have modification times less
* than 1 second apart.
*/
bool FileTimesDiffer(std::string const& f1, std::string const& f2);
private:
typedef std::unordered_map<std::string, cmFileTime> FileTimeMap;
FileTimeMap FileTimes;
};
#endif
|
