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128 lines
3.0 KiB
128 lines
3.0 KiB
5 years ago
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/* Distributed under the OSI-approved BSD 3-Clause License. See accompanying
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file Copyright.txt or https://cmake.org/licensing for details. */
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#include "cmFileTimes.h"
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#include "cmAlgorithms.h"
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#include "cm_sys_stat.h"
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#include <utility>
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#if defined(_WIN32)
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# include "cmSystemTools.h"
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# include <windows.h>
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#else
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# include <utime.h>
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#endif
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#if defined(_WIN32) && \
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(defined(_MSC_VER) || defined(__WATCOMC__) || defined(__MINGW32__))
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# include <io.h>
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#endif
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#ifdef _WIN32
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class cmFileTimes::WindowsHandle
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{
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public:
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WindowsHandle(HANDLE h)
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: handle_(h)
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{
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}
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~WindowsHandle()
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{
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if (this->handle_ != INVALID_HANDLE_VALUE) {
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CloseHandle(this->handle_);
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}
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}
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explicit operator bool() const
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{
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return this->handle_ != INVALID_HANDLE_VALUE;
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}
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bool operator!() const { return this->handle_ == INVALID_HANDLE_VALUE; }
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operator HANDLE() const { return this->handle_; }
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private:
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HANDLE handle_;
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};
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#endif
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class cmFileTimes::Times
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{
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public:
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#if defined(_WIN32) && !defined(__CYGWIN__)
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FILETIME timeCreation;
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FILETIME timeLastAccess;
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FILETIME timeLastWrite;
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#else
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struct utimbuf timeBuf;
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#endif
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};
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cmFileTimes::cmFileTimes() = default;
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cmFileTimes::cmFileTimes(std::string const& fileName)
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{
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Load(fileName);
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}
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cmFileTimes::~cmFileTimes() = default;
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bool cmFileTimes::Load(std::string const& fileName)
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{
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std::unique_ptr<Times> ptr;
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if (IsValid()) {
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// Invalidate this and re-use times
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ptr.swap(this->times);
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} else {
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ptr = cm::make_unique<Times>();
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}
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#if defined(_WIN32) && !defined(__CYGWIN__)
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cmFileTimes::WindowsHandle handle =
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CreateFileW(cmSystemTools::ConvertToWindowsExtendedPath(fileName).c_str(),
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GENERIC_READ, FILE_SHARE_READ, 0, OPEN_EXISTING,
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FILE_FLAG_BACKUP_SEMANTICS, 0);
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if (!handle) {
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return false;
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}
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if (!GetFileTime(handle, &ptr->timeCreation, &ptr->timeLastAccess,
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&ptr->timeLastWrite)) {
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return false;
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}
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#else
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struct stat st;
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if (stat(fileName.c_str(), &st) < 0) {
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return false;
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}
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ptr->timeBuf.actime = st.st_atime;
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ptr->timeBuf.modtime = st.st_mtime;
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#endif
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// Accept times
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this->times = std::move(ptr);
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return true;
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}
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bool cmFileTimes::Store(std::string const& fileName) const
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{
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if (!IsValid()) {
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return false;
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}
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#if defined(_WIN32) && !defined(__CYGWIN__)
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cmFileTimes::WindowsHandle handle = CreateFileW(
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cmSystemTools::ConvertToWindowsExtendedPath(fileName).c_str(),
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FILE_WRITE_ATTRIBUTES, 0, 0, OPEN_EXISTING, FILE_FLAG_BACKUP_SEMANTICS, 0);
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if (!handle) {
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return false;
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}
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return SetFileTime(handle, &this->times->timeCreation,
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&this->times->timeLastAccess,
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&this->times->timeLastWrite) != 0;
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#else
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return utime(fileName.c_str(), &this->times->timeBuf) >= 0;
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#endif
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}
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bool cmFileTimes::Copy(std::string const& fromFile, std::string const& toFile)
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{
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cmFileTimes fileTimes;
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return (fileTimes.Load(fromFile) && fileTimes.Store(toFile));
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}
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