diff options
Diffstat (limited to 'include/llvm/Support/FileSystem.h')
| -rw-r--r-- | include/llvm/Support/FileSystem.h | 109 |
1 files changed, 103 insertions, 6 deletions
diff --git a/include/llvm/Support/FileSystem.h b/include/llvm/Support/FileSystem.h index e6f9926..e0353f9 100644 --- a/include/llvm/Support/FileSystem.h +++ b/include/llvm/Support/FileSystem.h @@ -94,13 +94,62 @@ struct space_info { uint64_t available; }; + +enum perms { + no_perms = 0, + owner_read = 0400, + owner_write = 0200, + owner_exe = 0100, + owner_all = owner_read | owner_write | owner_exe, + group_read = 040, + group_write = 020, + group_exe = 010, + group_all = group_read | group_write | group_exe, + others_read = 04, + others_write = 02, + others_exe = 01, + others_all = others_read | others_write | others_exe, + all_all = owner_all | group_all | others_all, + set_uid_on_exe = 04000, + set_gid_on_exe = 02000, + sticky_bit = 01000, + perms_mask = all_all | set_uid_on_exe | set_gid_on_exe | sticky_bit, + perms_not_known = 0xFFFF, + add_perms = 0x1000, + remove_perms = 0x2000, + symlink_perms = 0x4000 +}; + +// Helper functions so that you can use & and | to manipulate perms bits: +inline perms operator|(perms l , perms r) { + return static_cast<perms>( + static_cast<unsigned short>(l) | static_cast<unsigned short>(r)); +} +inline perms operator&(perms l , perms r) { + return static_cast<perms>( + static_cast<unsigned short>(l) & static_cast<unsigned short>(r)); +} +inline perms &operator|=(perms &l, perms r) { + l = l | r; + return l; +} +inline perms &operator&=(perms &l, perms r) { + l = l & r; + return l; +} +inline perms operator~(perms x) { + return static_cast<perms>(~static_cast<unsigned short>(x)); +} + + + /// file_status - Represents the result of a call to stat and friends. It has /// a platform specific member to store the result. class file_status { #if defined(LLVM_ON_UNIX) - dev_t st_dev; - ino_t st_ino; + dev_t fs_st_dev; + ino_t fs_st_ino; #elif defined (LLVM_ON_WIN32) uint32_t LastWriteTimeHigh; uint32_t LastWriteTimeLow; @@ -113,12 +162,19 @@ class file_status friend bool equivalent(file_status A, file_status B); friend error_code status(const Twine &path, file_status &result); file_type Type; + perms Perms; public: - explicit file_status(file_type v=file_type::status_error) - : Type(v) {} + explicit file_status(file_type v=file_type::status_error, + perms prms=perms_not_known) + : Type(v), Perms(prms) {} + // getters file_type type() const { return Type; } + perms permissions() const { return Perms; } + + // setters void type(file_type v) { Type = v; } + void permissions(perms p) { Perms = p; } }; /// file_magic - An "enum class" enumeration of file types based on magic (the first @@ -309,6 +365,13 @@ bool equivalent(file_status A, file_status B); /// platform specific error_code. error_code equivalent(const Twine &A, const Twine &B, bool &result); +/// @brief Simpler version of equivalent for clients that don't need to +/// differentiate between an error and false. +inline bool equivalent(const Twine &A, const Twine &B) { + bool result; + return !equivalent(A, B, result) && result; +} + /// @brief Get file size. /// /// @param path Input path. @@ -388,6 +451,13 @@ error_code is_symlink(const Twine &path, bool &result); /// platform specific error_code. error_code status(const Twine &path, file_status &result); +/// @brief Modifies permission bits on a file +/// +/// @param path Input path. +/// @results errc::success if permissions have been changed, otherwise a +/// platform specific error_code. +error_code permissions(const Twine &path, perms prms); + /// @brief Is status available? /// /// @param path Input path. @@ -422,8 +492,8 @@ error_code status_known(const Twine &path, bool &result); /// @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, - bool makeAbsolute = true); + SmallVectorImpl<char> &result_path, + bool makeAbsolute = true, unsigned mode = 0600); /// @brief Canonicalize path. /// @@ -506,6 +576,33 @@ error_code FindLibrary(const Twine &short_name, SmallVectorImpl<char> &result); error_code GetMainExecutable(const char *argv0, void *MainAddr, SmallVectorImpl<char> &result); + +/// @brief Memory maps the contents of a file +/// +/// @param path Path to file to map. +/// @param file_offset Byte offset in file where mapping should begin. +/// @param size_t Byte length of range of the file to map. +/// @param map_writable If true, the file will be mapped in r/w such +/// that changes to the mapped buffer will be flushed back +/// to the file. If false, the file will be mapped read-only +/// and the buffer will be read-only. +/// @param result Set to the start address of the mapped buffer. +/// @results errc::success if result has been successfully set, otherwise a +/// platform specific error_code. +error_code map_file_pages(const Twine &path, off_t file_offset, size_t size, + bool map_writable, void *&result); + + +/// @brief Memory unmaps the contents of a file +/// +/// @param base Pointer to the start of the buffer. +/// @param size Byte length of the range to unmmap. +/// @results errc::success if result has been successfully set, otherwise a +/// platform specific error_code. +error_code unmap_file_pages(void *base, size_t size); + + + /// @} /// @name Iterators /// @{ |
