#ifndef LLVM_SUPPORT_FILE_SYSTEM_H
#define LLVM_SUPPORT_FILE_SYSTEM_H
+#include "llvm/ADT/IntrusiveRefCntPtr.h"
#include "llvm/ADT/SmallString.h"
#include "llvm/ADT/Twine.h"
#include "llvm/Support/DataTypes.h"
-#include "llvm/Support/PathV1.h"
+#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/system_error.h"
#include <ctime>
#include <iterator>
+#include <stack>
#include <string>
+#include <vector>
+
+#if HAVE_SYS_STAT_H
+#include <sys/stat.h>
+#endif
namespace llvm {
namespace sys {
/// a platform specific member to store the result.
class file_status
{
- // implementation defined status field.
+ #if defined(LLVM_ON_UNIX)
+ dev_t fs_st_dev;
+ ino_t fs_st_ino;
+ #elif defined (LLVM_ON_WIN32)
+ uint32_t LastWriteTimeHigh;
+ uint32_t LastWriteTimeLow;
+ uint32_t VolumeSerialNumber;
+ uint32_t FileSizeHigh;
+ uint32_t FileSizeLow;
+ uint32_t FileIndexHigh;
+ uint32_t FileIndexLow;
+ #endif
+ friend bool equivalent(file_status A, file_status B);
+ friend error_code status(const Twine &path, file_status &result);
file_type Type;
public:
explicit file_status(file_type v=file_type::status_error)
void type(file_type v) { Type = v; }
};
+/// file_magic - An "enum class" enumeration of file types based on magic (the first
+/// N bytes of the file).
+struct file_magic {
+ enum _ {
+ unknown = 0, ///< Unrecognized file
+ bitcode, ///< Bitcode file
+ archive, ///< ar style archive file
+ elf_relocatable, ///< ELF Relocatable object file
+ elf_executable, ///< ELF Executable image
+ elf_shared_object, ///< ELF dynamically linked shared lib
+ elf_core, ///< ELF core image
+ macho_object, ///< Mach-O Object file
+ macho_executable, ///< Mach-O Executable
+ macho_fixed_virtual_memory_shared_lib, ///< Mach-O Shared Lib, FVM
+ macho_core, ///< Mach-O Core File
+ macho_preload_executabl, ///< Mach-O Preloaded Executable
+ macho_dynamically_linked_shared_lib, ///< Mach-O dynlinked shared lib
+ macho_dynamic_linker, ///< The Mach-O dynamic linker
+ macho_bundle, ///< Mach-O Bundle file
+ macho_dynamically_linked_shared_lib_stub, ///< Mach-O Shared lib stub
+ macho_dsym_companion, ///< Mach-O dSYM companion file
+ coff_object, ///< COFF object file
+ pecoff_executable ///< PECOFF executable file
+ };
+
+ bool is_object() const {
+ return v_ == unknown ? false : true;
+ }
+
+ file_magic() : v_(unknown) {}
+ file_magic(_ v) : v_(v) {}
+ explicit file_magic(int v) : v_(_(v)) {}
+ operator int() const {return v_;}
+
+private:
+ int v_;
+};
+
/// @}
/// @name Physical Operators
/// @{
/// @brief Do paths represent the same thing?
///
+/// assert(status_known(A) || status_known(B));
+///
/// @param A Input path A.
/// @param B Input path B.
/// @param result Set to true if stat(A) and stat(B) have the same device and
/// 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.
/// @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.
///
error_code get_magic(const Twine &path, uint32_t len,
SmallVectorImpl<char> &result);
+/// @brief Identify the type of a binary file based on how magical it is.
+file_magic identify_magic(StringRef magic);
+
/// @brief Get and identify \a path's type based on its content.
///
/// @param path Input path.
/// @param result Set to the type of file, or LLVMFileType::Unknown_FileType.
/// @results errc::success if result has been successfully set, otherwise a
/// platform specific error_code.
-error_code identify_magic(const Twine &path, LLVMFileType &result);
+error_code identify_magic(const Twine &path, file_magic &result);
/// @brief Get library paths the system linker uses.
///
bool operator>=(const directory_entry& rhs) const;
};
+namespace detail {
+ struct DirIterState;
+
+ error_code directory_iterator_construct(DirIterState&, StringRef);
+ error_code directory_iterator_increment(DirIterState&);
+ error_code directory_iterator_destruct(DirIterState&);
+
+ /// DirIterState - Keeps state for the directory_iterator. It is reference
+ /// counted in order to preserve InputIterator semantics on copy.
+ struct DirIterState : public RefCountedBase<DirIterState> {
+ DirIterState()
+ : IterationHandle(0) {}
+
+ ~DirIterState() {
+ directory_iterator_destruct(*this);
+ }
+
+ intptr_t IterationHandle;
+ directory_entry CurrentEntry;
+ };
+}
+
/// directory_iterator - Iterates through the entries in path. There is no
/// operator++ because we need an error_code. If it's really needed we can make
/// it call report_fatal_error on error.
class directory_iterator {
- intptr_t IterationHandle;
- directory_entry CurrentEntry;
-
- // Platform implementations implement these functions to handle iteration.
- friend error_code directory_iterator_construct(directory_iterator &it,
- StringRef path);
- friend error_code directory_iterator_increment(directory_iterator &it);
- friend error_code directory_iterator_destruct(directory_iterator &it);
+ IntrusiveRefCntPtr<detail::DirIterState> State;
public:
- explicit directory_iterator(const Twine &path, error_code &ec)
- : IterationHandle(0) {
+ explicit directory_iterator(const Twine &path, error_code &ec) {
+ State = new detail::DirIterState;
SmallString<128> path_storage;
- ec = directory_iterator_construct(*this, path.toStringRef(path_storage));
+ ec = detail::directory_iterator_construct(*State,
+ path.toStringRef(path_storage));
}
- /// Construct end iterator.
- directory_iterator() : IterationHandle(0) {}
-
- ~directory_iterator() {
- directory_iterator_destruct(*this);
+ explicit directory_iterator(const directory_entry &de, error_code &ec) {
+ State = new detail::DirIterState;
+ ec = detail::directory_iterator_construct(*State, de.path());
}
+ /// Construct end iterator.
+ directory_iterator() : State(new detail::DirIterState) {}
+
// No operator++ because we need error_code.
directory_iterator &increment(error_code &ec) {
- ec = directory_iterator_increment(*this);
+ ec = directory_iterator_increment(*State);
return *this;
}
- const directory_entry &operator*() const { return CurrentEntry; }
- const directory_entry *operator->() const { return &CurrentEntry; }
+ const directory_entry &operator*() const { return State->CurrentEntry; }
+ const directory_entry *operator->() const { return &State->CurrentEntry; }
+
+ bool operator==(const directory_iterator &RHS) const {
+ return State->CurrentEntry == RHS.State->CurrentEntry;
+ }
bool operator!=(const directory_iterator &RHS) const {
- return CurrentEntry != RHS.CurrentEntry;
+ return !(*this == RHS);
}
// Other members as required by
// C++ Std, 24.1.1 Input iterators [input.iterators]
};
+namespace detail {
+ /// RecDirIterState - Keeps state for the recursive_directory_iterator. It is
+ /// reference counted in order to preserve InputIterator semantics on copy.
+ struct RecDirIterState : public RefCountedBase<RecDirIterState> {
+ RecDirIterState()
+ : Level(0)
+ , HasNoPushRequest(false) {}
+
+ std::stack<directory_iterator, std::vector<directory_iterator> > Stack;
+ uint16_t Level;
+ bool HasNoPushRequest;
+ };
+}
+
/// recursive_directory_iterator - Same as directory_iterator except for it
/// recurses down into child directories.
class recursive_directory_iterator {
- uint16_t Level;
- bool HasNoPushRequest;
- // implementation directory iterator status
+ IntrusiveRefCntPtr<detail::RecDirIterState> State;
public:
- explicit recursive_directory_iterator(const Twine &path, error_code &ec);
+ recursive_directory_iterator() {}
+ explicit recursive_directory_iterator(const Twine &path, error_code &ec)
+ : State(new detail::RecDirIterState) {
+ State->Stack.push(directory_iterator(path, ec));
+ if (State->Stack.top() == directory_iterator())
+ State.reset();
+ }
// No operator++ because we need error_code.
- directory_iterator &increment(error_code &ec);
+ recursive_directory_iterator &increment(error_code &ec) {
+ static const directory_iterator end_itr;
+
+ if (State->HasNoPushRequest)
+ State->HasNoPushRequest = false;
+ else {
+ file_status st;
+ if ((ec = State->Stack.top()->status(st))) return *this;
+ if (is_directory(st)) {
+ State->Stack.push(directory_iterator(*State->Stack.top(), ec));
+ if (ec) return *this;
+ if (State->Stack.top() != end_itr) {
+ ++State->Level;
+ return *this;
+ }
+ State->Stack.pop();
+ }
+ }
+
+ while (!State->Stack.empty()
+ && State->Stack.top().increment(ec) == end_itr) {
+ State->Stack.pop();
+ --State->Level;
+ }
+
+ // Check if we are done. If so, create an end iterator.
+ if (State->Stack.empty())
+ State.reset();
+
+ return *this;
+ }
- const directory_entry &operator*() const;
- const directory_entry *operator->() const;
+ const directory_entry &operator*() const { return *State->Stack.top(); }
+ const directory_entry *operator->() const { return &*State->Stack.top(); }
// observers
- /// Gets the current level. path is at level 0.
- int level() const;
+ /// Gets the current level. Starting path is at level 0.
+ int level() const { return State->Level; }
+
/// Returns true if no_push has been called for this directory_entry.
- bool no_push_request() const;
+ bool no_push_request() const { return State->HasNoPushRequest; }
// modifiers
/// Goes up one level if Level > 0.
- void pop();
+ void pop() {
+ assert(State && "Cannot pop and end itertor!");
+ assert(State->Level > 0 && "Cannot pop an iterator with level < 1");
+
+ static const directory_iterator end_itr;
+ error_code ec;
+ do {
+ if (ec)
+ report_fatal_error("Error incrementing directory iterator.");
+ State->Stack.pop();
+ --State->Level;
+ } while (!State->Stack.empty()
+ && State->Stack.top().increment(ec) == end_itr);
+
+ // Check if we are done. If so, create an end iterator.
+ if (State->Stack.empty())
+ State.reset();
+ }
+
/// Does not go down into the current directory_entry.
- void no_push();
+ void no_push() { State->HasNoPushRequest = true; }
+ bool operator==(const recursive_directory_iterator &RHS) const {
+ return State == RHS.State;
+ }
+
+ bool operator!=(const recursive_directory_iterator &RHS) const {
+ return !(*this == RHS);
+ }
// Other members as required by
// C++ Std, 24.1.1 Input iterators [input.iterators]
};
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