VM: Re-format to use at most one newline between functions

runtime/bin/file_linux.cc

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "platform/globals.h"
 #if defined(HOST_OS_LINUX)
 
 #include "bin/file.h"
 
 #include <errno.h>         // NOLINT
@@ skipping 21 matching lines @@
   ~FileHandle() {}
   int fd() const { return fd_; }
   void set_fd(int fd) { fd_ = fd; }
 
  private:
   int fd_;
 
   DISALLOW_COPY_AND_ASSIGN(FileHandle);
 };
 
-
 File::~File() {
   if (!IsClosed() && handle_->fd() != STDOUT_FILENO &&
       handle_->fd() != STDERR_FILENO) {
     Close();
   }
   delete handle_;
 }
 
-
 void File::Close() {
   ASSERT(handle_->fd() >= 0);
   if (handle_->fd() == STDOUT_FILENO) {
     // If stdout, redirect fd to /dev/null.
     int null_fd = TEMP_FAILURE_RETRY(open("/dev/null", O_WRONLY));
     ASSERT(null_fd >= 0);
     VOID_TEMP_FAILURE_RETRY(dup2(null_fd, handle_->fd()));
     VOID_TEMP_FAILURE_RETRY(close(null_fd));
   } else {
     int err = TEMP_FAILURE_RETRY(close(handle_->fd()));
     if (err != 0) {
       const int kBufferSize = 1024;
       char error_buf[kBufferSize];
       Log::PrintErr("%s\n", Utils::StrError(errno, error_buf, kBufferSize));
     }
   }
   handle_->set_fd(kClosedFd);
 }
 
-
 intptr_t File::GetFD() {
   return handle_->fd();
 }
 
-
 bool File::IsClosed() {
   return handle_->fd() == kClosedFd;
 }
 
-
 MappedMemory* File::Map(MapType type, int64_t position, int64_t length) {
   ASSERT(handle_->fd() >= 0);
   ASSERT(length > 0);
   int prot = PROT_NONE;
   switch (type) {
     case kReadOnly:
       prot = PROT_READ;
       break;
     case kReadExecute:
       prot = PROT_READ | PROT_EXEC;
       break;
     default:
       return NULL;
   }
   void* addr = mmap(NULL, length, prot, MAP_PRIVATE, handle_->fd(), position);
   if (addr == MAP_FAILED) {
     return NULL;
   }
   return new MappedMemory(addr, length);
 }
 
-
 void MappedMemory::Unmap() {
   int result = munmap(address_, size_);
   ASSERT(result == 0);
   address_ = 0;
   size_ = 0;
 }
 
-
 int64_t File::Read(void* buffer, int64_t num_bytes) {
   ASSERT(handle_->fd() >= 0);
   return TEMP_FAILURE_RETRY(read(handle_->fd(), buffer, num_bytes));
 }
 
-
 int64_t File::Write(const void* buffer, int64_t num_bytes) {
   ASSERT(handle_->fd() >= 0);
   return TEMP_FAILURE_RETRY(write(handle_->fd(), buffer, num_bytes));
 }
 
-
 bool File::VPrint(const char* format, va_list args) {
   // Measure.
   va_list measure_args;
   va_copy(measure_args, args);
   intptr_t len = vsnprintf(NULL, 0, format, measure_args);
   va_end(measure_args);
 
   char* buffer = reinterpret_cast<char*>(malloc(len + 1));
 
   // Print.
   va_list print_args;
   va_copy(print_args, args);
   vsnprintf(buffer, len + 1, format, print_args);
   va_end(print_args);
 
   bool result = WriteFully(buffer, len);
   free(buffer);
   return result;
 }
 
 int64_t File::Position() {
   ASSERT(handle_->fd() >= 0);
   return NO_RETRY_EXPECTED(lseek64(handle_->fd(), 0, SEEK_CUR));
 }
 
-
 bool File::SetPosition(int64_t position) {
   ASSERT(handle_->fd() >= 0);
   return NO_RETRY_EXPECTED(lseek64(handle_->fd(), position, SEEK_SET)) >= 0;
 }
 
-
 bool File::Truncate(int64_t length) {
   ASSERT(handle_->fd() >= 0);
   return TEMP_FAILURE_RETRY(ftruncate64(handle_->fd(), length) != -1);
 }
 
-
 bool File::Flush() {
   ASSERT(handle_->fd() >= 0);
   return NO_RETRY_EXPECTED(fsync(handle_->fd())) != -1;
 }
 
-
 bool File::Lock(File::LockType lock, int64_t start, int64_t end) {
   ASSERT(handle_->fd() >= 0);
   ASSERT((end == -1) || (end > start));
   struct flock fl;
   switch (lock) {
     case File::kLockUnlock:
       fl.l_type = F_UNLCK;
       break;
     case File::kLockShared:
     case File::kLockBlockingShared:
@@ skipping 10 matching lines @@
   fl.l_start = start;
   fl.l_len = end == -1 ? 0 : end - start;
   int cmd = F_SETLK;
   if ((lock == File::kLockBlockingShared) ||
       (lock == File::kLockBlockingExclusive)) {
     cmd = F_SETLKW;
   }
   return TEMP_FAILURE_RETRY(fcntl(handle_->fd(), cmd, &fl)) != -1;
 }
 
-
 int64_t File::Length() {
   ASSERT(handle_->fd() >= 0);
   struct stat64 st;
   if (TEMP_FAILURE_RETRY(fstat64(handle_->fd(), &st)) == 0) {
     return st.st_size;
   }
   return -1;
 }
 
-
 File* File::FileOpenW(const wchar_t* system_name, FileOpenMode mode) {
   UNREACHABLE();
   return NULL;
 }
 
-
 File* File::Open(const char* name, FileOpenMode mode) {
   // Report errors for non-regular files.
   struct stat64 st;
   if (TEMP_FAILURE_RETRY(stat64(name, &st)) == 0) {
     // Only accept regular files, character devices, and pipes.
     if (!S_ISREG(st.st_mode) && !S_ISCHR(st.st_mode) && !S_ISFIFO(st.st_mode)) {
       errno = (S_ISDIR(st.st_mode)) ? EISDIR : ENOENT;
       return NULL;
     }
   }
@@ skipping 17 matching lines @@
   if ((((mode & kWrite) != 0) && ((mode & kTruncate) == 0)) ||
       (((mode & kWriteOnly) != 0) && ((mode & kTruncate) == 0))) {
     int64_t position = NO_RETRY_EXPECTED(lseek64(fd, 0, SEEK_END));
     if (position < 0) {
       return NULL;
     }
   }
   return new File(new FileHandle(fd));
 }
 
-
 File* File::OpenStdio(int fd) {
   return ((fd < 0) || (2 < fd)) ? NULL : new File(new FileHandle(fd));
 }
 
-
 bool File::Exists(const char* name) {
   struct stat64 st;
   if (TEMP_FAILURE_RETRY(stat64(name, &st)) == 0) {
     // Everything but a directory and a link is a file to Dart.
     return !S_ISDIR(st.st_mode) && !S_ISLNK(st.st_mode);
   } else {
     return false;
   }
 }
 
-
 bool File::Create(const char* name) {
   int fd =
       TEMP_FAILURE_RETRY(open64(name, O_RDONLY | O_CREAT | O_CLOEXEC, 0666));
   if (fd < 0) {
     return false;
   }
   // File.create returns a File, so we shouldn't be giving the illusion that the
   // call has created a file or that a file already exists if there is already
   // an entity at the same path that is a directory or a link.
   bool is_file = true;
   struct stat64 st;
   if (TEMP_FAILURE_RETRY(fstat64(fd, &st)) == 0) {
     if (S_ISDIR(st.st_mode)) {
       errno = EISDIR;
       is_file = false;
     } else if (S_ISLNK(st.st_mode)) {
       errno = ENOENT;
       is_file = false;
     }
   }
   FDUtils::SaveErrorAndClose(fd);
   return is_file;
 }
 
-
 bool File::CreateLink(const char* name, const char* target) {
   return NO_RETRY_EXPECTED(symlink(target, name)) == 0;
 }
 
-
 File::Type File::GetType(const char* pathname, bool follow_links) {
   struct stat64 entry_info;
   int stat_success;
   if (follow_links) {
     stat_success = TEMP_FAILURE_RETRY(stat64(pathname, &entry_info));
   } else {
     stat_success = TEMP_FAILURE_RETRY(lstat64(pathname, &entry_info));
   }
   if (stat_success == -1) {
     return File::kDoesNotExist;
   }
   if (S_ISDIR(entry_info.st_mode)) {
     return File::kIsDirectory;
   }
   if (S_ISREG(entry_info.st_mode)) {
     return File::kIsFile;
   }
   if (S_ISLNK(entry_info.st_mode)) {
     return File::kIsLink;
   }
   return File::kDoesNotExist;
 }
 
-
 static bool CheckTypeAndSetErrno(const char* name,
                                  File::Type expected,
                                  bool follow_links) {
   File::Type actual = File::GetType(name, follow_links);
   if (actual == expected) {
     return true;
   }
   switch (actual) {
     case File::kIsDirectory:
       errno = EISDIR;
       break;
     case File::kDoesNotExist:
       errno = ENOENT;
       break;
     default:
       errno = EINVAL;
       break;
   }
   return false;
 }
 
-
 bool File::Delete(const char* name) {
   return CheckTypeAndSetErrno(name, kIsFile, true) &&
          (NO_RETRY_EXPECTED(unlink(name)) == 0);
 }
 
-
 bool File::DeleteLink(const char* name) {
   return CheckTypeAndSetErrno(name, kIsLink, false) &&
          (NO_RETRY_EXPECTED(unlink(name)) == 0);
 }
 
-
 bool File::Rename(const char* old_path, const char* new_path) {
   return CheckTypeAndSetErrno(old_path, kIsFile, true) &&
          (NO_RETRY_EXPECTED(rename(old_path, new_path)) == 0);
 }
 
-
 bool File::RenameLink(const char* old_path, const char* new_path) {
   return CheckTypeAndSetErrno(old_path, kIsLink, false) &&
          (NO_RETRY_EXPECTED(rename(old_path, new_path)) == 0);
 }
 
-
 bool File::Copy(const char* old_path, const char* new_path) {
   if (!CheckTypeAndSetErrno(old_path, kIsFile, true)) {
     return false;
   }
   struct stat64 st;
   if (TEMP_FAILURE_RETRY(stat64(old_path, &st)) != 0) {
     return false;
   }
   int old_fd = TEMP_FAILURE_RETRY(open64(old_path, O_RDONLY | O_CLOEXEC));
   if (old_fd < 0) {
@@ skipping 30 matching lines @@
   VOID_TEMP_FAILURE_RETRY(close(old_fd));
   VOID_TEMP_FAILURE_RETRY(close(new_fd));
   if (result < 0) {
     VOID_NO_RETRY_EXPECTED(unlink(new_path));
     errno = e;
     return false;
   }
   return true;
 }
 
-
 static bool StatHelper(const char* name, struct stat64* st) {
   if (TEMP_FAILURE_RETRY(stat64(name, st)) != 0) {
     return false;
   }
   // Signal an error if it's a directory.
   if (S_ISDIR(st->st_mode)) {
     errno = EISDIR;
     return false;
   }
   // Otherwise assume the caller knows what it's doing.
   return true;
 }
 
-
 int64_t File::LengthFromPath(const char* name) {
   struct stat64 st;
   if (!StatHelper(name, &st)) {
     return -1;
   }
   return st.st_size;
 }
 
-
 static int64_t TimespecToMilliseconds(const struct timespec& t) {
   return static_cast<int64_t>(t.tv_sec) * 1000L +
          static_cast<int64_t>(t.tv_nsec) / 1000000L;
 }
 
-
 void File::Stat(const char* name, int64_t* data) {
   struct stat64 st;
   if (TEMP_FAILURE_RETRY(stat64(name, &st)) == 0) {
     if (S_ISREG(st.st_mode)) {
       data[kType] = kIsFile;
     } else if (S_ISDIR(st.st_mode)) {
       data[kType] = kIsDirectory;
     } else if (S_ISLNK(st.st_mode)) {
       data[kType] = kIsLink;
     } else {
       data[kType] = kDoesNotExist;
     }
     data[kCreatedTime] = TimespecToMilliseconds(st.st_ctim);
     data[kModifiedTime] = TimespecToMilliseconds(st.st_mtim);
     data[kAccessedTime] = TimespecToMilliseconds(st.st_atim);
     data[kMode] = st.st_mode;
     data[kSize] = st.st_size;
   } else {
     data[kType] = kDoesNotExist;
   }
 }
 
-
 time_t File::LastModified(const char* name) {
   struct stat64 st;
   if (!StatHelper(name, &st)) {
     return -1;
   }
   return st.st_mtime;
 }
 
-
 time_t File::LastAccessed(const char* name) {
   struct stat64 st;
   if (!StatHelper(name, &st)) {
     return -1;
   }
   return st.st_atime;
 }
 
-
 bool File::SetLastAccessed(const char* name, int64_t millis) {
   // First get the current times.
   struct stat64 st;
   if (!StatHelper(name, &st)) {
     return false;
   }
 
   // Set the new time:
   struct utimbuf times;
   times.actime = millis / kMillisecondsPerSecond;
   times.modtime = st.st_mtime;
   return utime(name, &times) == 0;
 }
 
-
 bool File::SetLastModified(const char* name, int64_t millis) {
   // First get the current times.
   struct stat64 st;
   if (!StatHelper(name, &st)) {
     return false;
   }
 
   // Set the new time:
   struct utimbuf times;
   times.actime = st.st_atime;
   times.modtime = millis / kMillisecondsPerSecond;
   return utime(name, &times) == 0;
 }
 
-
 const char* File::LinkTarget(const char* pathname) {
   struct stat64 link_stats;
   if (TEMP_FAILURE_RETRY(lstat64(pathname, &link_stats)) != 0) {
     return NULL;
   }
   if (!S_ISLNK(link_stats.st_mode)) {
     errno = ENOENT;
     return NULL;
   }
   // Don't rely on the link_stats.st_size for the size of the link
   // target. For some filesystems, e.g. procfs, this value is always
   // 0. Also the link might have changed before the readlink call.
   const int kBufferSize = PATH_MAX + 1;
   char target[kBufferSize];
   size_t target_size =
       TEMP_FAILURE_RETRY(readlink(pathname, target, kBufferSize));
   if (target_size <= 0) {
     return NULL;
   }
   char* target_name = DartUtils::ScopedCString(target_size + 1);
   ASSERT(target_name != NULL);
   memmove(target_name, target, target_size);
   target_name[target_size] = '\0';
   return target_name;
 }
 
-
 bool File::IsAbsolutePath(const char* pathname) {
   return (pathname != NULL && pathname[0] == '/');
 }
 
-
 const char* File::GetCanonicalPath(const char* pathname) {
   char* abs_path = NULL;
   if (pathname != NULL) {
     char* resolved_path = DartUtils::ScopedCString(PATH_MAX + 1);
     ASSERT(resolved_path != NULL);
     do {
       abs_path = realpath(pathname, resolved_path);
     } while (abs_path == NULL && errno == EINTR);
     ASSERT(abs_path == NULL || IsAbsolutePath(abs_path));
     ASSERT(abs_path == NULL || (abs_path == resolved_path));
   }
   return abs_path;
 }
 
-
 const char* File::PathSeparator() {
   return "/";
 }
 
-
 const char* File::StringEscapedPathSeparator() {
   return "/";
 }
 
-
 File::StdioHandleType File::GetStdioHandleType(int fd) {
   ASSERT((0 <= fd) && (fd <= 2));
   struct stat64 buf;
   int result = TEMP_FAILURE_RETRY(fstat64(fd, &buf));
   if (result == -1) {
     return kOther;
   }
   if (S_ISCHR(buf.st_mode)) {
     return kTerminal;
   }
   if (S_ISFIFO(buf.st_mode)) {
     return kPipe;
   }
   if (S_ISSOCK(buf.st_mode)) {
     return kSocket;
   }
   if (S_ISREG(buf.st_mode)) {
     return kFile;
   }
   return kOther;
 }
 
-
 File::Identical File::AreIdentical(const char* file_1, const char* file_2) {
   struct stat64 file_1_info;
   struct stat64 file_2_info;
   if ((TEMP_FAILURE_RETRY(lstat64(file_1, &file_1_info)) == -1) ||
       (TEMP_FAILURE_RETRY(lstat64(file_2, &file_2_info)) == -1)) {
     return File::kError;
   }
   return ((file_1_info.st_ino == file_2_info.st_ino) &&
           (file_1_info.st_dev == file_2_info.st_dev))
              ? File::kIdentical
              : File::kDifferent;
 }
 
 }  // namespace bin
 }  // namespace dart
 
 #endif  // defined(HOST_OS_LINUX)