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