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//===-- FileInfo.cpp ------------------------------------------------------===//
//
// This source file is part of the Swift.org open source project
//
// Copyright (c) 2014 - 2015 Apple Inc. and the Swift project authors
// Licensed under Apache License v2.0 with Runtime Library Exception
//
// See http://swift.org/LICENSE.txt for license information
// See http://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
//
//===----------------------------------------------------------------------===//
#include "llbuild/Basic/FileInfo.h"
#include "llbuild/Basic/Stat.h"
#include <cassert>
#include <cstring>
#include <fstream>
#include <cstdio>
#include <cerrno>
using namespace llbuild;
using namespace llbuild::basic;
bool FileInfo::isDirectory() const {
return (mode & S_IFDIR) != 0;
}
/// Get the information to represent the state of the given node in the file
/// system.
FileInfo FileInfo::getInfoForPath(const std::string& path, bool asLink) {
FileInfo result;
sys::StatStruct buf;
auto statResult =
asLink ? sys::lstat(path.c_str(), &buf) : sys::stat(path.c_str(), &buf);
if (statResult != 0) {
memset(&result, 0, sizeof(result));
assert(result.isMissing());
return result;
}
result.device = buf.st_dev;
result.inode = buf.st_ino;
result.mode = buf.st_mode;
result.size = buf.st_size;
#if defined(__APPLE__)
auto seconds = buf.st_mtimespec.tv_sec;
auto nanoseconds = buf.st_mtimespec.tv_nsec;
#elif defined(_WIN32)
auto seconds = buf.st_mtime;
auto nanoseconds = 0;
#else
auto seconds = buf.st_mtim.tv_sec;
auto nanoseconds = buf.st_mtim.tv_nsec;
#endif
result.modTime.seconds = seconds;
result.modTime.nanoseconds = nanoseconds;
// Enforce we never accidentally create our sentinel missing file value.
if (result.isMissing()) {
result.modTime.nanoseconds = 1;
assert(!result.isMissing());
}
return result;
}
FileChecksum FileChecksum::getChecksumForPath(const std::string& path) {
FileChecksum result;
FileInfo fileInfo = FileInfo::getInfoForPath(path);
if (fileInfo.isMissing()) {
memset(result.bytes, 0, sizeof(result.bytes));
} else if (fileInfo.isDirectory()) {
result.bytes[0] = 1;
} else {
PlatformSpecificHasher hasher(path);
if (hasher.readAndDigest()) {
hasher.copy(result.bytes);
} else {
memset(result.bytes, 0, sizeof(result.bytes));
}
}
return result;
}
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