diff options
Diffstat (limited to 'src/disk_interface.cc')
| -rw-r--r-- | src/disk_interface.cc | 135 |
1 files changed, 111 insertions, 24 deletions
diff --git a/src/disk_interface.cc b/src/disk_interface.cc index 3233144..ae2146e 100644 --- a/src/disk_interface.cc +++ b/src/disk_interface.cc @@ -14,6 +14,8 @@ #include "disk_interface.h" +#include <algorithm> + #include <errno.h> #include <stdio.h> #include <string.h> @@ -31,15 +33,16 @@ namespace { string DirName(const string& path) { #ifdef _WIN32 - const char kPathSeparator = '\\'; + const char kPathSeparators[] = "\\/"; #else - const char kPathSeparator = '/'; + const char kPathSeparators[] = "/"; #endif - - string::size_type slash_pos = path.rfind(kPathSeparator); + string::size_type slash_pos = path.find_last_of(kPathSeparators); if (slash_pos == string::npos) return string(); // Nothing to do. - while (slash_pos > 0 && path[slash_pos - 1] == kPathSeparator) + const char* const kEnd = kPathSeparators + strlen(kPathSeparators); + while (slash_pos > 0 && + std::find(kPathSeparators, kEnd, path[slash_pos - 1]) != kEnd) --slash_pos; return path.substr(0, slash_pos); } @@ -52,6 +55,80 @@ int MakeDir(const string& path) { #endif } +#ifdef _WIN32 +TimeStamp TimeStampFromFileTime(const FILETIME& filetime) { + // FILETIME is in 100-nanosecond increments since the Windows epoch. + // We don't much care about epoch correctness but we do want the + // resulting value to fit in an integer. + uint64_t mtime = ((uint64_t)filetime.dwHighDateTime << 32) | + ((uint64_t)filetime.dwLowDateTime); + mtime /= 1000000000LL / 100; // 100ns -> s. + mtime -= 12622770400LL; // 1600 epoch -> 2000 epoch (subtract 400 years). + return (TimeStamp)mtime; +} + +TimeStamp StatSingleFile(const string& path, bool quiet) { + WIN32_FILE_ATTRIBUTE_DATA attrs; + if (!GetFileAttributesEx(path.c_str(), GetFileExInfoStandard, &attrs)) { + DWORD err = GetLastError(); + if (err == ERROR_FILE_NOT_FOUND || err == ERROR_PATH_NOT_FOUND) + return 0; + if (!quiet) { + Error("GetFileAttributesEx(%s): %s", path.c_str(), + GetLastErrorString().c_str()); + } + return -1; + } + return TimeStampFromFileTime(attrs.ftLastWriteTime); +} + +#pragma warning(push) +#pragma warning(disable: 4996) // GetVersionExA is deprecated post SDK 8.1. +bool IsWindows7OrLater() { + OSVERSIONINFO version_info = { sizeof(version_info) }; + if (!GetVersionEx(&version_info)) + Fatal("GetVersionEx: %s", GetLastErrorString().c_str()); + return version_info.dwMajorVersion > 6 || + version_info.dwMajorVersion == 6 && version_info.dwMinorVersion >= 1; +} +#pragma warning(pop) + +bool StatAllFilesInDir(const string& dir, map<string, TimeStamp>* stamps, + bool quiet) { + // FindExInfoBasic is 30% faster than FindExInfoStandard. + static bool can_use_basic_info = IsWindows7OrLater(); + // This is not in earlier SDKs. + const FINDEX_INFO_LEVELS kFindExInfoBasic = + static_cast<FINDEX_INFO_LEVELS>(1); + FINDEX_INFO_LEVELS level = + can_use_basic_info ? kFindExInfoBasic : FindExInfoStandard; + WIN32_FIND_DATAA ffd; + HANDLE find_handle = FindFirstFileExA((dir + "\\*").c_str(), level, &ffd, + FindExSearchNameMatch, NULL, 0); + + if (find_handle == INVALID_HANDLE_VALUE) { + DWORD err = GetLastError(); + if (err == ERROR_FILE_NOT_FOUND || err == ERROR_PATH_NOT_FOUND) + return true; + if (!quiet) { + Error("FindFirstFileExA(%s): %s", dir.c_str(), + GetLastErrorString().c_str()); + } + return false; + } + do { + if (ffd.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) + continue; + string lowername = ffd.cFileName; + transform(lowername.begin(), lowername.end(), lowername.begin(), ::tolower); + stamps->insert(make_pair(lowername, + TimeStampFromFileTime(ffd.ftLastWriteTime))); + } while (FindNextFileA(find_handle, &ffd)); + FindClose(find_handle); + return true; +} +#endif // _WIN32 + } // namespace // DiskInterface --------------------------------------------------------------- @@ -75,7 +152,7 @@ bool DiskInterface::MakeDirs(const string& path) { // RealDiskInterface ----------------------------------------------------------- -TimeStamp RealDiskInterface::Stat(const string& path) { +TimeStamp RealDiskInterface::Stat(const string& path) const { #ifdef _WIN32 // MSDN: "Naming Files, Paths, and Namespaces" // http://msdn.microsoft.com/en-us/library/windows/desktop/aa365247(v=vs.85).aspx @@ -86,26 +163,25 @@ TimeStamp RealDiskInterface::Stat(const string& path) { } return -1; } - WIN32_FILE_ATTRIBUTE_DATA attrs; - if (!GetFileAttributesEx(path.c_str(), GetFileExInfoStandard, &attrs)) { - DWORD err = GetLastError(); - if (err == ERROR_FILE_NOT_FOUND || err == ERROR_PATH_NOT_FOUND) - return 0; - if (!quiet_) { - Error("GetFileAttributesEx(%s): %s", path.c_str(), - GetLastErrorString().c_str()); + if (!use_cache_) + return StatSingleFile(path, quiet_); + + string dir = DirName(path); + string base(path.substr(dir.size() ? dir.size() + 1 : 0)); + + transform(dir.begin(), dir.end(), dir.begin(), ::tolower); + transform(base.begin(), base.end(), base.begin(), ::tolower); + + Cache::iterator ci = cache_.find(dir); + if (ci == cache_.end()) { + ci = cache_.insert(make_pair(dir, DirCache())).first; + if (!StatAllFilesInDir(dir.empty() ? "." : dir, &ci->second, quiet_)) { + cache_.erase(ci); + return -1; } - return -1; } - const FILETIME& filetime = attrs.ftLastWriteTime; - // FILETIME is in 100-nanosecond increments since the Windows epoch. - // We don't much care about epoch correctness but we do want the - // resulting value to fit in an integer. - uint64_t mtime = ((uint64_t)filetime.dwHighDateTime << 32) | - ((uint64_t)filetime.dwLowDateTime); - mtime /= 1000000000LL / 100; // 100ns -> s. - mtime -= 12622770400LL; // 1600 epoch -> 2000 epoch (subtract 400 years). - return (TimeStamp)mtime; + DirCache::iterator di = ci->second.find(base); + return di != ci->second.end() ? di->second : 0; #else struct stat st; if (stat(path.c_str(), &st) < 0) { @@ -146,6 +222,9 @@ bool RealDiskInterface::WriteFile(const string& path, const string& contents) { bool RealDiskInterface::MakeDir(const string& path) { if (::MakeDir(path) < 0) { + if (errno == EEXIST) { + return true; + } Error("mkdir(%s): %s", path.c_str(), strerror(errno)); return false; } @@ -175,3 +254,11 @@ int RealDiskInterface::RemoveFile(const string& path) { return 0; } } + +void RealDiskInterface::AllowStatCache(bool allow) { +#ifdef _WIN32 + use_cache_ = allow; + if (!use_cache_) + cache_.clear(); +#endif +} |