#include <io.h>
#endif
+using namespace llvm;
+
namespace {
using llvm::StringRef;
using llvm::sys::path::is_separator;
};
// Implemented in Unix/Path.inc and Windows/Path.inc.
-static llvm::error_code
-createUniqueEntity(const llvm::Twine &Model, int &ResultFD,
- llvm::SmallVectorImpl<char> &ResultPath,
- bool MakeAbsolute, unsigned Mode, FSEntity Type);
+static error_code TempDir(SmallVectorImpl<char> &result);
+
+static error_code createUniqueEntity(const Twine &Model, int &ResultFD,
+ SmallVectorImpl<char> &ResultPath,
+ bool MakeAbsolute, unsigned Mode,
+ FSEntity Type) {
+ SmallString<128> ModelStorage;
+ Model.toVector(ModelStorage);
+
+ if (MakeAbsolute) {
+ // Make model absolute by prepending a temp directory if it's not already.
+ if (!sys::path::is_absolute(Twine(ModelStorage))) {
+ SmallString<128> TDir;
+ if (error_code EC = TempDir(TDir))
+ return EC;
+ sys::path::append(TDir, Twine(ModelStorage));
+ ModelStorage.swap(TDir);
+ }
+ }
+
+ // From here on, DO NOT modify model. It may be needed if the randomly chosen
+ // path already exists.
+ ResultPath = ModelStorage;
+ // Null terminate.
+ ResultPath.push_back(0);
+ ResultPath.pop_back();
+
+retry_random_path:
+ // Replace '%' with random chars.
+ for (unsigned i = 0, e = ModelStorage.size(); i != e; ++i) {
+ if (ModelStorage[i] == '%')
+ ResultPath[i] = "0123456789abcdef"[sys::Process::GetRandomNumber() & 15];
+ }
+
+ // Try to open + create the file.
+ switch (Type) {
+ case FS_File: {
+ if (error_code EC = sys::fs::openFileForWrite(
+ Twine(ResultPath.begin()), ResultFD,
+ sys::fs::F_RW | sys::fs::F_Excl | sys::fs::F_Binary, Mode)) {
+ if (EC == errc::file_exists)
+ goto retry_random_path;
+ return EC;
+ }
+
+ return error_code::success();
+ }
+
+ case FS_Name: {
+ bool Exists;
+ error_code EC = sys::fs::exists(ResultPath.begin(), Exists);
+ if (EC)
+ return EC;
+ if (Exists)
+ goto retry_random_path;
+ return error_code::success();
+ }
+
+ case FS_Dir: {
+ if (error_code EC = sys::fs::create_directory(ResultPath.begin(), false)) {
+ if (EC == errc::file_exists)
+ goto retry_random_path;
+ return EC;
+ }
+ return error_code::success();
+ }
+ }
+ llvm_unreachable("Invalid Type");
+}
namespace llvm {
namespace sys {