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-rw-r--r--Source/cmFileTimeComparison.cxx233
1 files changed, 0 insertions, 233 deletions
diff --git a/Source/cmFileTimeComparison.cxx b/Source/cmFileTimeComparison.cxx
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--- a/Source/cmFileTimeComparison.cxx
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@@ -1,233 +0,0 @@
-/* Distributed under the OSI-approved BSD 3-Clause License. See accompanying
- file Copyright.txt or https://cmake.org/licensing for details. */
-#include "cmFileTimeComparison.h"
-
-#include <string>
-#include <time.h>
-#include <unordered_map>
-#include <utility>
-
-// Use a platform-specific API to get file times efficiently.
-#if !defined(_WIN32) || defined(__CYGWIN__)
-# include "cm_sys_stat.h"
-# define cmFileTimeComparison_Type struct stat
-#else
-# include "cmsys/Encoding.hxx"
-# include <windows.h>
-# define cmFileTimeComparison_Type FILETIME
-#endif
-
-class cmFileTimeComparisonInternal
-{
-public:
- // Internal comparison method.
- inline bool FileTimeCompare(const std::string& f1, const std::string& f2,
- int* result);
-
- bool FileTimesDiffer(const std::string& f1, const std::string& f2);
-
-private:
- typedef std::unordered_map<std::string, cmFileTimeComparison_Type>
- FileStatsMap;
- FileStatsMap Files;
-
- // Internal methods to lookup and compare modification times.
- inline bool Stat(const std::string& fname, cmFileTimeComparison_Type* st);
- inline int Compare(cmFileTimeComparison_Type* st1,
- cmFileTimeComparison_Type* st2);
- inline bool TimesDiffer(cmFileTimeComparison_Type* st1,
- cmFileTimeComparison_Type* st2);
-};
-
-bool cmFileTimeComparisonInternal::Stat(const std::string& fname,
- cmFileTimeComparison_Type* st)
-{
- // Use the stored time if available.
- cmFileTimeComparisonInternal::FileStatsMap::iterator fit =
- this->Files.find(fname);
- if (fit != this->Files.end()) {
- *st = fit->second;
- return true;
- }
-
-#if !defined(_WIN32) || defined(__CYGWIN__)
- // POSIX version. Use the stat function.
- int res = ::stat(fname.c_str(), st);
- if (res != 0) {
- return false;
- }
-#else
- // Windows version. Get the modification time from extended file
- // attributes.
- WIN32_FILE_ATTRIBUTE_DATA fdata;
- if (!GetFileAttributesExW(cmsys::Encoding::ToWide(fname).c_str(),
- GetFileExInfoStandard, &fdata)) {
- return false;
- }
-
- // Copy the file time to the output location.
- *st = fdata.ftLastWriteTime;
-#endif
-
- // Store the time for future use.
- this->Files[fname] = *st;
- return true;
-}
-
-cmFileTimeComparison::cmFileTimeComparison()
-{
- this->Internals = new cmFileTimeComparisonInternal;
-}
-
-cmFileTimeComparison::~cmFileTimeComparison()
-{
- delete this->Internals;
-}
-
-bool cmFileTimeComparison::FileTimeCompare(const std::string& f1,
- const std::string& f2, int* result)
-{
- return this->Internals->FileTimeCompare(f1, f2, result);
-}
-
-bool cmFileTimeComparison::FileTimesDiffer(const std::string& f1,
- const std::string& f2)
-{
- return this->Internals->FileTimesDiffer(f1, f2);
-}
-
-int cmFileTimeComparisonInternal::Compare(cmFileTimeComparison_Type* s1,
- cmFileTimeComparison_Type* s2)
-{
-#if !defined(_WIN32) || defined(__CYGWIN__)
-# if CMake_STAT_HAS_ST_MTIM
- // Compare using nanosecond resolution.
- if (s1->st_mtim.tv_sec < s2->st_mtim.tv_sec) {
- return -1;
- }
- if (s1->st_mtim.tv_sec > s2->st_mtim.tv_sec) {
- return 1;
- }
- if (s1->st_mtim.tv_nsec < s2->st_mtim.tv_nsec) {
- return -1;
- }
- if (s1->st_mtim.tv_nsec > s2->st_mtim.tv_nsec) {
- return 1;
- }
-# elif CMake_STAT_HAS_ST_MTIMESPEC
- // Compare using nanosecond resolution.
- if (s1->st_mtimespec.tv_sec < s2->st_mtimespec.tv_sec) {
- return -1;
- }
- if (s1->st_mtimespec.tv_sec > s2->st_mtimespec.tv_sec) {
- return 1;
- }
- if (s1->st_mtimespec.tv_nsec < s2->st_mtimespec.tv_nsec) {
- return -1;
- }
- if (s1->st_mtimespec.tv_nsec > s2->st_mtimespec.tv_nsec) {
- return 1;
- }
-# else
- // Compare using 1 second resolution.
- if (s1->st_mtime < s2->st_mtime) {
- return -1;
- }
- if (s1->st_mtime > s2->st_mtime) {
- return 1;
- }
-# endif
- // Files have the same time.
- return 0;
-#else
- // Compare using system-provided function.
- return (int)CompareFileTime(s1, s2);
-#endif
-}
-
-bool cmFileTimeComparisonInternal::TimesDiffer(cmFileTimeComparison_Type* s1,
- cmFileTimeComparison_Type* s2)
-{
-#if !defined(_WIN32) || defined(__CYGWIN__)
-# if CMake_STAT_HAS_ST_MTIM
- // Times are integers in units of 1ns.
- long long bil = 1000000000;
- long long t1 = s1->st_mtim.tv_sec * bil + s1->st_mtim.tv_nsec;
- long long t2 = s2->st_mtim.tv_sec * bil + s2->st_mtim.tv_nsec;
- if (t1 < t2) {
- return (t2 - t1) >= bil;
- }
- if (t2 < t1) {
- return (t1 - t2) >= bil;
- }
- return false;
-# elif CMake_STAT_HAS_ST_MTIMESPEC
- // Times are integers in units of 1ns.
- long long bil = 1000000000;
- long long t1 = s1->st_mtimespec.tv_sec * bil + s1->st_mtimespec.tv_nsec;
- long long t2 = s2->st_mtimespec.tv_sec * bil + s2->st_mtimespec.tv_nsec;
- if (t1 < t2) {
- return (t2 - t1) >= bil;
- }
- if (t2 < t1) {
- return (t1 - t2) >= bil;
- }
- return false;
-# else
- // Times are integers in units of 1s.
- if (s1->st_mtime < s2->st_mtime) {
- return (s2->st_mtime - s1->st_mtime) >= 1;
- }
- if (s1->st_mtime > s2->st_mtime) {
- return (s1->st_mtime - s2->st_mtime) >= 1;
- }
- return false;
-# endif
-#else
- // Times are integers in units of 100ns.
- LARGE_INTEGER t1;
- LARGE_INTEGER t2;
- t1.LowPart = s1->dwLowDateTime;
- t1.HighPart = s1->dwHighDateTime;
- t2.LowPart = s2->dwLowDateTime;
- t2.HighPart = s2->dwHighDateTime;
- if (t1.QuadPart < t2.QuadPart) {
- return (t2.QuadPart - t1.QuadPart) >= static_cast<LONGLONG>(10000000);
- } else if (t2.QuadPart < t1.QuadPart) {
- return (t1.QuadPart - t2.QuadPart) >= static_cast<LONGLONG>(10000000);
- } else {
- return false;
- }
-#endif
-}
-
-bool cmFileTimeComparisonInternal::FileTimeCompare(const std::string& f1,
- const std::string& f2,
- int* result)
-{
- // Get the modification time for each file.
- cmFileTimeComparison_Type s1;
- cmFileTimeComparison_Type s2;
- if (this->Stat(f1, &s1) && this->Stat(f2, &s2)) {
- // Compare the two modification times.
- *result = this->Compare(&s1, &s2);
- return true;
- }
- // No comparison available. Default to the same time.
- *result = 0;
- return false;
-}
-
-bool cmFileTimeComparisonInternal::FileTimesDiffer(const std::string& f1,
- const std::string& f2)
-{
- // Get the modification time for each file.
- cmFileTimeComparison_Type s1;
- cmFileTimeComparison_Type s2;
- if (this->Stat(f1, &s1) && this->Stat(f2, &s2)) {
- // Compare the two modification times.
- return this->TimesDiffer(&s1, &s2);
- }
- // No comparison available. Default to different times.
- return true;
-}
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