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-rw-r--r--contrib/llvm/lib/Support/PathV2.cpp949
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diff --git a/contrib/llvm/lib/Support/PathV2.cpp b/contrib/llvm/lib/Support/PathV2.cpp
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index ac53a9e9..0000000
--- a/contrib/llvm/lib/Support/PathV2.cpp
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@@ -1,949 +0,0 @@
-//===-- PathV2.cpp - Implement OS Path Concept ------------------*- C++ -*-===//
-//
-// The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-//
-// This file implements the operating system PathV2 API.
-//
-//===----------------------------------------------------------------------===//
-
-#include "llvm/Support/PathV2.h"
-#include "llvm/Support/Endian.h"
-#include "llvm/Support/ErrorHandling.h"
-#include "llvm/Support/FileSystem.h"
-#include <cctype>
-#include <cstdio>
-#include <cstring>
-#ifdef __APPLE__
-#include <unistd.h>
-#endif
-
-namespace {
- using llvm::StringRef;
- using llvm::sys::path::is_separator;
-
-#ifdef LLVM_ON_WIN32
- const char *separators = "\\/";
- const char prefered_separator = '\\';
-#else
- const char separators = '/';
- const char prefered_separator = '/';
-#endif
-
- StringRef find_first_component(StringRef path) {
- // Look for this first component in the following order.
- // * empty (in this case we return an empty string)
- // * either C: or {//,\\}net.
- // * {/,\}
- // * {.,..}
- // * {file,directory}name
-
- if (path.empty())
- return path;
-
-#ifdef LLVM_ON_WIN32
- // C:
- if (path.size() >= 2 && std::isalpha(static_cast<unsigned char>(path[0])) &&
- path[1] == ':')
- return path.substr(0, 2);
-#endif
-
- // //net
- if ((path.size() > 2) &&
- is_separator(path[0]) &&
- path[0] == path[1] &&
- !is_separator(path[2])) {
- // Find the next directory separator.
- size_t end = path.find_first_of(separators, 2);
- return path.substr(0, end);
- }
-
- // {/,\}
- if (is_separator(path[0]))
- return path.substr(0, 1);
-
- if (path.startswith(".."))
- return path.substr(0, 2);
-
- if (path[0] == '.')
- return path.substr(0, 1);
-
- // * {file,directory}name
- size_t end = path.find_first_of(separators, 2);
- return path.substr(0, end);
- }
-
- size_t filename_pos(StringRef str) {
- if (str.size() == 2 &&
- is_separator(str[0]) &&
- str[0] == str[1])
- return 0;
-
- if (str.size() > 0 && is_separator(str[str.size() - 1]))
- return str.size() - 1;
-
- size_t pos = str.find_last_of(separators, str.size() - 1);
-
-#ifdef LLVM_ON_WIN32
- if (pos == StringRef::npos)
- pos = str.find_last_of(':', str.size() - 2);
-#endif
-
- if (pos == StringRef::npos ||
- (pos == 1 && is_separator(str[0])))
- return 0;
-
- return pos + 1;
- }
-
- size_t root_dir_start(StringRef str) {
- // case "c:/"
-#ifdef LLVM_ON_WIN32
- if (str.size() > 2 &&
- str[1] == ':' &&
- is_separator(str[2]))
- return 2;
-#endif
-
- // case "//"
- if (str.size() == 2 &&
- is_separator(str[0]) &&
- str[0] == str[1])
- return StringRef::npos;
-
- // case "//net"
- if (str.size() > 3 &&
- is_separator(str[0]) &&
- str[0] == str[1] &&
- !is_separator(str[2])) {
- return str.find_first_of(separators, 2);
- }
-
- // case "/"
- if (str.size() > 0 && is_separator(str[0]))
- return 0;
-
- return StringRef::npos;
- }
-
- size_t parent_path_end(StringRef path) {
- size_t end_pos = filename_pos(path);
-
- bool filename_was_sep = path.size() > 0 && is_separator(path[end_pos]);
-
- // Skip separators except for root dir.
- size_t root_dir_pos = root_dir_start(path.substr(0, end_pos));
-
- while(end_pos > 0 &&
- (end_pos - 1) != root_dir_pos &&
- is_separator(path[end_pos - 1]))
- --end_pos;
-
- if (end_pos == 1 && root_dir_pos == 0 && filename_was_sep)
- return StringRef::npos;
-
- return end_pos;
- }
-} // end unnamed namespace
-
-namespace llvm {
-namespace sys {
-namespace path {
-
-const_iterator begin(StringRef path) {
- const_iterator i;
- i.Path = path;
- i.Component = find_first_component(path);
- i.Position = 0;
- return i;
-}
-
-const_iterator end(StringRef path) {
- const_iterator i;
- i.Path = path;
- i.Position = path.size();
- return i;
-}
-
-const_iterator &const_iterator::operator++() {
- assert(Position < Path.size() && "Tried to increment past end!");
-
- // Increment Position to past the current component
- Position += Component.size();
-
- // Check for end.
- if (Position == Path.size()) {
- Component = StringRef();
- return *this;
- }
-
- // Both POSIX and Windows treat paths that begin with exactly two separators
- // specially.
- bool was_net = Component.size() > 2 &&
- is_separator(Component[0]) &&
- Component[1] == Component[0] &&
- !is_separator(Component[2]);
-
- // Handle separators.
- if (is_separator(Path[Position])) {
- // Root dir.
- if (was_net
-#ifdef LLVM_ON_WIN32
- // c:/
- || Component.endswith(":")
-#endif
- ) {
- Component = Path.substr(Position, 1);
- return *this;
- }
-
- // Skip extra separators.
- while (Position != Path.size() &&
- is_separator(Path[Position])) {
- ++Position;
- }
-
- // Treat trailing '/' as a '.'.
- if (Position == Path.size()) {
- --Position;
- Component = ".";
- return *this;
- }
- }
-
- // Find next component.
- size_t end_pos = Path.find_first_of(separators, Position);
- Component = Path.slice(Position, end_pos);
-
- return *this;
-}
-
-const_iterator &const_iterator::operator--() {
- // If we're at the end and the previous char was a '/', return '.'.
- if (Position == Path.size() &&
- Path.size() > 1 &&
- is_separator(Path[Position - 1])
-#ifdef LLVM_ON_WIN32
- && Path[Position - 2] != ':'
-#endif
- ) {
- --Position;
- Component = ".";
- return *this;
- }
-
- // Skip separators unless it's the root directory.
- size_t root_dir_pos = root_dir_start(Path);
- size_t end_pos = Position;
-
- while(end_pos > 0 &&
- (end_pos - 1) != root_dir_pos &&
- is_separator(Path[end_pos - 1]))
- --end_pos;
-
- // Find next separator.
- size_t start_pos = filename_pos(Path.substr(0, end_pos));
- Component = Path.slice(start_pos, end_pos);
- Position = start_pos;
- return *this;
-}
-
-bool const_iterator::operator==(const const_iterator &RHS) const {
- return Path.begin() == RHS.Path.begin() &&
- Position == RHS.Position;
-}
-
-bool const_iterator::operator!=(const const_iterator &RHS) const {
- return !(*this == RHS);
-}
-
-ptrdiff_t const_iterator::operator-(const const_iterator &RHS) const {
- return Position - RHS.Position;
-}
-
-const StringRef root_path(StringRef path) {
- const_iterator b = begin(path),
- pos = b,
- e = end(path);
- if (b != e) {
- bool has_net = b->size() > 2 && is_separator((*b)[0]) && (*b)[1] == (*b)[0];
- bool has_drive =
-#ifdef LLVM_ON_WIN32
- b->endswith(":");
-#else
- false;
-#endif
-
- if (has_net || has_drive) {
- if ((++pos != e) && is_separator((*pos)[0])) {
- // {C:/,//net/}, so get the first two components.
- return path.substr(0, b->size() + pos->size());
- } else {
- // just {C:,//net}, return the first component.
- return *b;
- }
- }
-
- // POSIX style root directory.
- if (is_separator((*b)[0])) {
- return *b;
- }
- }
-
- return StringRef();
-}
-
-const StringRef root_name(StringRef path) {
- const_iterator b = begin(path),
- e = end(path);
- if (b != e) {
- bool has_net = b->size() > 2 && is_separator((*b)[0]) && (*b)[1] == (*b)[0];
- bool has_drive =
-#ifdef LLVM_ON_WIN32
- b->endswith(":");
-#else
- false;
-#endif
-
- if (has_net || has_drive) {
- // just {C:,//net}, return the first component.
- return *b;
- }
- }
-
- // No path or no name.
- return StringRef();
-}
-
-const StringRef root_directory(StringRef path) {
- const_iterator b = begin(path),
- pos = b,
- e = end(path);
- if (b != e) {
- bool has_net = b->size() > 2 && is_separator((*b)[0]) && (*b)[1] == (*b)[0];
- bool has_drive =
-#ifdef LLVM_ON_WIN32
- b->endswith(":");
-#else
- false;
-#endif
-
- if ((has_net || has_drive) &&
- // {C:,//net}, skip to the next component.
- (++pos != e) && is_separator((*pos)[0])) {
- return *pos;
- }
-
- // POSIX style root directory.
- if (!has_net && is_separator((*b)[0])) {
- return *b;
- }
- }
-
- // No path or no root.
- return StringRef();
-}
-
-const StringRef relative_path(StringRef path) {
- StringRef root = root_path(path);
- return path.substr(root.size());
-}
-
-void append(SmallVectorImpl<char> &path, const Twine &a,
- const Twine &b,
- const Twine &c,
- const Twine &d) {
- SmallString<32> a_storage;
- SmallString<32> b_storage;
- SmallString<32> c_storage;
- SmallString<32> d_storage;
-
- SmallVector<StringRef, 4> components;
- if (!a.isTriviallyEmpty()) components.push_back(a.toStringRef(a_storage));
- if (!b.isTriviallyEmpty()) components.push_back(b.toStringRef(b_storage));
- if (!c.isTriviallyEmpty()) components.push_back(c.toStringRef(c_storage));
- if (!d.isTriviallyEmpty()) components.push_back(d.toStringRef(d_storage));
-
- for (SmallVectorImpl<StringRef>::const_iterator i = components.begin(),
- e = components.end();
- i != e; ++i) {
- bool path_has_sep = !path.empty() && is_separator(path[path.size() - 1]);
- bool component_has_sep = !i->empty() && is_separator((*i)[0]);
- bool is_root_name = has_root_name(*i);
-
- if (path_has_sep) {
- // Strip separators from beginning of component.
- size_t loc = i->find_first_not_of(separators);
- StringRef c = i->substr(loc);
-
- // Append it.
- path.append(c.begin(), c.end());
- continue;
- }
-
- if (!component_has_sep && !(path.empty() || is_root_name)) {
- // Add a separator.
- path.push_back(prefered_separator);
- }
-
- path.append(i->begin(), i->end());
- }
-}
-
-void append(SmallVectorImpl<char> &path,
- const_iterator begin, const_iterator end) {
- for (; begin != end; ++begin)
- path::append(path, *begin);
-}
-
-const StringRef parent_path(StringRef path) {
- size_t end_pos = parent_path_end(path);
- if (end_pos == StringRef::npos)
- return StringRef();
- else
- return path.substr(0, end_pos);
-}
-
-void remove_filename(SmallVectorImpl<char> &path) {
- size_t end_pos = parent_path_end(StringRef(path.begin(), path.size()));
- if (end_pos != StringRef::npos)
- path.set_size(end_pos);
-}
-
-void replace_extension(SmallVectorImpl<char> &path, const Twine &extension) {
- StringRef p(path.begin(), path.size());
- SmallString<32> ext_storage;
- StringRef ext = extension.toStringRef(ext_storage);
-
- // Erase existing extension.
- size_t pos = p.find_last_of('.');
- if (pos != StringRef::npos && pos >= filename_pos(p))
- path.set_size(pos);
-
- // Append '.' if needed.
- if (ext.size() > 0 && ext[0] != '.')
- path.push_back('.');
-
- // Append extension.
- path.append(ext.begin(), ext.end());
-}
-
-void native(const Twine &path, SmallVectorImpl<char> &result) {
- // Clear result.
- result.clear();
-#ifdef LLVM_ON_WIN32
- SmallString<128> path_storage;
- StringRef p = path.toStringRef(path_storage);
- result.reserve(p.size());
- for (StringRef::const_iterator i = p.begin(),
- e = p.end();
- i != e;
- ++i) {
- if (*i == '/')
- result.push_back('\\');
- else
- result.push_back(*i);
- }
-#else
- path.toVector(result);
-#endif
-}
-
-const StringRef filename(StringRef path) {
- return *(--end(path));
-}
-
-const StringRef stem(StringRef path) {
- StringRef fname = filename(path);
- size_t pos = fname.find_last_of('.');
- if (pos == StringRef::npos)
- return fname;
- else
- if ((fname.size() == 1 && fname == ".") ||
- (fname.size() == 2 && fname == ".."))
- return fname;
- else
- return fname.substr(0, pos);
-}
-
-const StringRef extension(StringRef path) {
- StringRef fname = filename(path);
- size_t pos = fname.find_last_of('.');
- if (pos == StringRef::npos)
- return StringRef();
- else
- if ((fname.size() == 1 && fname == ".") ||
- (fname.size() == 2 && fname == ".."))
- return StringRef();
- else
- return fname.substr(pos);
-}
-
-bool is_separator(char value) {
- switch(value) {
-#ifdef LLVM_ON_WIN32
- case '\\': // fall through
-#endif
- case '/': return true;
- default: return false;
- }
-}
-
-void system_temp_directory(bool erasedOnReboot, SmallVectorImpl<char> &result) {
- result.clear();
-
-#ifdef __APPLE__
- // On Darwin, use DARWIN_USER_TEMP_DIR or DARWIN_USER_CACHE_DIR.
- int ConfName = erasedOnReboot? _CS_DARWIN_USER_TEMP_DIR
- : _CS_DARWIN_USER_CACHE_DIR;
- size_t ConfLen = confstr(ConfName, 0, 0);
- if (ConfLen > 0) {
- do {
- result.resize(ConfLen);
- ConfLen = confstr(ConfName, result.data(), result.size());
- } while (ConfLen > 0 && ConfLen != result.size());
-
- if (ConfLen > 0) {
- assert(result.back() == 0);
- result.pop_back();
- return;
- }
-
- result.clear();
- }
-#endif
-
- // Check whether the temporary directory is specified by an environment
- // variable.
- const char *EnvironmentVariable;
-#ifdef LLVM_ON_WIN32
- EnvironmentVariable = "TEMP";
-#else
- EnvironmentVariable = "TMPDIR";
-#endif
- if (char *RequestedDir = getenv(EnvironmentVariable)) {
- result.append(RequestedDir, RequestedDir + strlen(RequestedDir));
- return;
- }
-
- // Fall back to a system default.
- const char *DefaultResult;
-#ifdef LLVM_ON_WIN32
- (void)erasedOnReboot;
- DefaultResult = "C:\\TEMP";
-#else
- if (erasedOnReboot)
- DefaultResult = "/tmp";
- else
- DefaultResult = "/var/tmp";
-#endif
- result.append(DefaultResult, DefaultResult + strlen(DefaultResult));
-}
-
-bool has_root_name(const Twine &path) {
- SmallString<128> path_storage;
- StringRef p = path.toStringRef(path_storage);
-
- return !root_name(p).empty();
-}
-
-bool has_root_directory(const Twine &path) {
- SmallString<128> path_storage;
- StringRef p = path.toStringRef(path_storage);
-
- return !root_directory(p).empty();
-}
-
-bool has_root_path(const Twine &path) {
- SmallString<128> path_storage;
- StringRef p = path.toStringRef(path_storage);
-
- return !root_path(p).empty();
-}
-
-bool has_relative_path(const Twine &path) {
- SmallString<128> path_storage;
- StringRef p = path.toStringRef(path_storage);
-
- return !relative_path(p).empty();
-}
-
-bool has_filename(const Twine &path) {
- SmallString<128> path_storage;
- StringRef p = path.toStringRef(path_storage);
-
- return !filename(p).empty();
-}
-
-bool has_parent_path(const Twine &path) {
- SmallString<128> path_storage;
- StringRef p = path.toStringRef(path_storage);
-
- return !parent_path(p).empty();
-}
-
-bool has_stem(const Twine &path) {
- SmallString<128> path_storage;
- StringRef p = path.toStringRef(path_storage);
-
- return !stem(p).empty();
-}
-
-bool has_extension(const Twine &path) {
- SmallString<128> path_storage;
- StringRef p = path.toStringRef(path_storage);
-
- return !extension(p).empty();
-}
-
-bool is_absolute(const Twine &path) {
- SmallString<128> path_storage;
- StringRef p = path.toStringRef(path_storage);
-
- bool rootDir = has_root_directory(p),
-#ifdef LLVM_ON_WIN32
- rootName = has_root_name(p);
-#else
- rootName = true;
-#endif
-
- return rootDir && rootName;
-}
-
-bool is_relative(const Twine &path) {
- return !is_absolute(path);
-}
-
-} // end namespace path
-
-namespace fs {
-
-error_code make_absolute(SmallVectorImpl<char> &path) {
- StringRef p(path.data(), path.size());
-
- bool rootDirectory = path::has_root_directory(p),
-#ifdef LLVM_ON_WIN32
- rootName = path::has_root_name(p);
-#else
- rootName = true;
-#endif
-
- // Already absolute.
- if (rootName && rootDirectory)
- return error_code::success();
-
- // All of the following conditions will need the current directory.
- SmallString<128> current_dir;
- if (error_code ec = current_path(current_dir)) return ec;
-
- // Relative path. Prepend the current directory.
- if (!rootName && !rootDirectory) {
- // Append path to the current directory.
- path::append(current_dir, p);
- // Set path to the result.
- path.swap(current_dir);
- return error_code::success();
- }
-
- if (!rootName && rootDirectory) {
- StringRef cdrn = path::root_name(current_dir);
- SmallString<128> curDirRootName(cdrn.begin(), cdrn.end());
- path::append(curDirRootName, p);
- // Set path to the result.
- path.swap(curDirRootName);
- return error_code::success();
- }
-
- if (rootName && !rootDirectory) {
- StringRef pRootName = path::root_name(p);
- StringRef bRootDirectory = path::root_directory(current_dir);
- StringRef bRelativePath = path::relative_path(current_dir);
- StringRef pRelativePath = path::relative_path(p);
-
- SmallString<128> res;
- path::append(res, pRootName, bRootDirectory, bRelativePath, pRelativePath);
- path.swap(res);
- return error_code::success();
- }
-
- llvm_unreachable("All rootName and rootDirectory combinations should have "
- "occurred above!");
-}
-
-error_code create_directories(const Twine &path, bool &existed) {
- SmallString<128> path_storage;
- StringRef p = path.toStringRef(path_storage);
-
- StringRef parent = path::parent_path(p);
- if (!parent.empty()) {
- bool parent_exists;
- if (error_code ec = fs::exists(parent, parent_exists)) return ec;
-
- if (!parent_exists)
- if (error_code ec = create_directories(parent, existed)) return ec;
- }
-
- return create_directory(p, existed);
-}
-
-bool exists(file_status status) {
- return status_known(status) && status.type() != file_type::file_not_found;
-}
-
-bool status_known(file_status s) {
- return s.type() != file_type::status_error;
-}
-
-bool is_directory(file_status status) {
- return status.type() == file_type::directory_file;
-}
-
-error_code is_directory(const Twine &path, bool &result) {
- file_status st;
- if (error_code ec = status(path, st))
- return ec;
- result = is_directory(st);
- return error_code::success();
-}
-
-bool is_regular_file(file_status status) {
- return status.type() == file_type::regular_file;
-}
-
-error_code is_regular_file(const Twine &path, bool &result) {
- file_status st;
- if (error_code ec = status(path, st))
- return ec;
- result = is_regular_file(st);
- return error_code::success();
-}
-
-bool is_symlink(file_status status) {
- return status.type() == file_type::symlink_file;
-}
-
-error_code is_symlink(const Twine &path, bool &result) {
- file_status st;
- if (error_code ec = status(path, st))
- return ec;
- result = is_symlink(st);
- return error_code::success();
-}
-
-bool is_other(file_status status) {
- return exists(status) &&
- !is_regular_file(status) &&
- !is_directory(status) &&
- !is_symlink(status);
-}
-
-void directory_entry::replace_filename(const Twine &filename, file_status st) {
- SmallString<128> path(Path.begin(), Path.end());
- path::remove_filename(path);
- path::append(path, filename);
- Path = path.str();
- Status = st;
-}
-
-error_code has_magic(const Twine &path, const Twine &magic, bool &result) {
- SmallString<32> MagicStorage;
- StringRef Magic = magic.toStringRef(MagicStorage);
- SmallString<32> Buffer;
-
- if (error_code ec = get_magic(path, Magic.size(), Buffer)) {
- if (ec == errc::value_too_large) {
- // Magic.size() > file_size(Path).
- result = false;
- return error_code::success();
- }
- return ec;
- }
-
- result = Magic == Buffer;
- return error_code::success();
-}
-
-/// @brief Identify the magic in magic.
-file_magic identify_magic(StringRef magic) {
- if (magic.size() < 4)
- return file_magic::unknown;
- switch ((unsigned char)magic[0]) {
- case 0xDE: // 0x0B17C0DE = BC wraper
- if (magic[1] == (char)0xC0 && magic[2] == (char)0x17 &&
- magic[3] == (char)0x0B)
- return file_magic::bitcode;
- break;
- case 'B':
- if (magic[1] == 'C' && magic[2] == (char)0xC0 && magic[3] == (char)0xDE)
- return file_magic::bitcode;
- break;
- case '!':
- if (magic.size() >= 8)
- if (memcmp(magic.data(),"!<arch>\n",8) == 0)
- return file_magic::archive;
- break;
-
- case '\177':
- if (magic[1] == 'E' && magic[2] == 'L' && magic[3] == 'F') {
- bool Data2MSB = magic[5] == 2;
- unsigned high = Data2MSB ? 16 : 17;
- unsigned low = Data2MSB ? 17 : 16;
- if (magic.size() >= 18 && magic[high] == 0)
- switch (magic[low]) {
- default: break;
- case 1: return file_magic::elf_relocatable;
- case 2: return file_magic::elf_executable;
- case 3: return file_magic::elf_shared_object;
- case 4: return file_magic::elf_core;
- }
- }
- break;
-
- case 0xCA:
- if (magic[1] == char(0xFE) && magic[2] == char(0xBA) &&
- magic[3] == char(0xBE)) {
- // This is complicated by an overlap with Java class files.
- // See the Mach-O section in /usr/share/file/magic for details.
- if (magic.size() >= 8 && magic[7] < 43)
- // FIXME: Universal Binary of any type.
- return file_magic::macho_dynamically_linked_shared_lib;
- }
- break;
-
- // The two magic numbers for mach-o are:
- // 0xfeedface - 32-bit mach-o
- // 0xfeedfacf - 64-bit mach-o
- case 0xFE:
- case 0xCE:
- case 0xCF: {
- uint16_t type = 0;
- if (magic[0] == char(0xFE) && magic[1] == char(0xED) &&
- magic[2] == char(0xFA) &&
- (magic[3] == char(0xCE) || magic[3] == char(0xCF))) {
- /* Native endian */
- if (magic.size() >= 16) type = magic[14] << 8 | magic[15];
- } else if ((magic[0] == char(0xCE) || magic[0] == char(0xCF)) &&
- magic[1] == char(0xFA) && magic[2] == char(0xED) &&
- magic[3] == char(0xFE)) {
- /* Reverse endian */
- if (magic.size() >= 14) type = magic[13] << 8 | magic[12];
- }
- switch (type) {
- default: break;
- case 1: return file_magic::macho_object;
- case 2: return file_magic::macho_executable;
- case 3: return file_magic::macho_fixed_virtual_memory_shared_lib;
- case 4: return file_magic::macho_core;
- case 5: return file_magic::macho_preload_executabl;
- case 6: return file_magic::macho_dynamically_linked_shared_lib;
- case 7: return file_magic::macho_dynamic_linker;
- case 8: return file_magic::macho_bundle;
- case 9: return file_magic::macho_dynamic_linker;
- case 10: return file_magic::macho_dsym_companion;
- }
- break;
- }
- case 0xF0: // PowerPC Windows
- case 0x83: // Alpha 32-bit
- case 0x84: // Alpha 64-bit
- case 0x66: // MPS R4000 Windows
- case 0x50: // mc68K
- case 0x4c: // 80386 Windows
- if (magic[1] == 0x01)
- return file_magic::coff_object;
-
- case 0x90: // PA-RISC Windows
- case 0x68: // mc68K Windows
- if (magic[1] == 0x02)
- return file_magic::coff_object;
- break;
-
- case 0x4d: // Possible MS-DOS stub on Windows PE file
- if (magic[1] == 0x5a) {
- uint32_t off =
- *reinterpret_cast<const support::ulittle32_t*>(magic.data() + 0x3c);
- // PE/COFF file, either EXE or DLL.
- if (off < magic.size() && memcmp(magic.data() + off, "PE\0\0",4) == 0)
- return file_magic::pecoff_executable;
- }
- break;
-
- case 0x64: // x86-64 Windows.
- if (magic[1] == char(0x86))
- return file_magic::coff_object;
- break;
-
- default:
- break;
- }
- return file_magic::unknown;
-}
-
-error_code identify_magic(const Twine &path, file_magic &result) {
- SmallString<32> Magic;
- error_code ec = get_magic(path, Magic.capacity(), Magic);
- if (ec && ec != errc::value_too_large)
- return ec;
-
- result = identify_magic(Magic);
- return error_code::success();
-}
-
-namespace {
-error_code remove_all_r(StringRef path, file_type ft, uint32_t &count) {
- if (ft == file_type::directory_file) {
- // This code would be a lot better with exceptions ;/.
- error_code ec;
- directory_iterator i(path, ec);
- if (ec) return ec;
- for (directory_iterator e; i != e; i.increment(ec)) {
- if (ec) return ec;
- file_status st;
- if (error_code ec = i->status(st)) return ec;
- if (error_code ec = remove_all_r(i->path(), st.type(), count)) return ec;
- }
- bool obviously_this_exists;
- if (error_code ec = remove(path, obviously_this_exists)) return ec;
- assert(obviously_this_exists);
- ++count; // Include the directory itself in the items removed.
- } else {
- bool obviously_this_exists;
- if (error_code ec = remove(path, obviously_this_exists)) return ec;
- assert(obviously_this_exists);
- ++count;
- }
-
- return error_code::success();
-}
-} // end unnamed namespace
-
-error_code remove_all(const Twine &path, uint32_t &num_removed) {
- SmallString<128> path_storage;
- StringRef p = path.toStringRef(path_storage);
-
- file_status fs;
- if (error_code ec = status(path, fs))
- return ec;
- num_removed = 0;
- return remove_all_r(p, fs.type(), num_removed);
-}
-
-error_code directory_entry::status(file_status &result) const {
- return fs::status(Path, result);
-}
-
-} // end namespace fs
-} // end namespace sys
-} // end namespace llvm
-
-// Include the truly platform-specific parts.
-#if defined(LLVM_ON_UNIX)
-#include "Unix/PathV2.inc"
-#endif
-#if defined(LLVM_ON_WIN32)
-#include "Windows/PathV2.inc"
-#endif
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