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Support/FileSystem: Add unique_file and exists implementations.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@120776 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Michael J. Spencer
2010-12-03 01:21:28 +00:00
parent f4e7b167a0
commit 3cb84ef65d
5 changed files with 361 additions and 9 deletions
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include/llvm/Support/FileSystem.h
+9 -7
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@@ -390,19 +390,21 @@ error_code symlink_status(const Twine &path, file_status &result);
///
/// Generates a unique path suitable for a temporary file and then opens it as a
/// file. The name is based on \a model with '%' replaced by a random char in
/// [0-9a-f].
/// [0-9a-f]. If \a model is not an absolute path, a suitable temporary
/// directory will be prepended.
///
/// This is an atomic operation. Either the file is created and opened, or the
/// file system is left untouched.
///
/// clang-%%-%%-%%-%%-%%.s => <current-directory>/clang-a0-b1-c2-d3-e4.s
/// clang-%%-%%-%%-%%-%%.s => /tmp/clang-a0-b1-c2-d3-e4.s
///
/// @param model Name to base unique path off of.
/// @param result Set to the opened file.
/// @results errc::success if result has been successfully set, otherwise a
/// platform specific error_code.
/// @see temp_directory_path
error_code unique_file(const Twine &model, void* i_have_not_decided_the_ty_yet);
/// @param result_fs Set to the opened file's file descriptor.
/// @param result_path Set to the opened file's absolute path.
/// @results errc::success if result_{fd,path} have been successfully set,
/// otherwise a platform specific error_code.
error_code unique_file(const Twine &model, int &result_fd,
SmallVectorImpl<char> &result_path);
/// @brief Canonicalize path.
///