Linux: Use upstream google-breakpad instead of our fork....

breakpad/linux/directory_reader.h

-// Copyright (c) 2009, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-#ifndef CLIENT_LINUX_HANDLE_DIRECTORY_READER_H_
-#define CLIENT_LINUX_HANDLE_DIRECTORY_READER_H_
-
-#include <stdint.h>
-#include <unistd.h>
-#include <limits.h>
-#include <assert.h>
-#include <errno.h>
-#include <string.h>
-
-#include "breakpad/linux/linux_syscall_support.h"
-
-namespace google_breakpad {
-
-// A class for enumerating a directory without using diropen/readdir or other
-// functions which may allocate memory.
-class DirectoryReader {
- public:
-  DirectoryReader(int fd)
-      : fd_(fd),
-        buf_used_(0) {
-  }
-
-  // Return the next entry from the directory
-  //   name: (output) the NUL terminated entry name
-  //
-  // Returns true iff successful (false on EOF).
-  //
-  // After calling this, one must call |PopEntry| otherwise you'll get the same
-  // entry over and over.
-  bool GetNextEntry(const char** name) {
-    struct kernel_dirent* const dent =
-      reinterpret_cast<kernel_dirent*>(buf_);
-
-    if (buf_used_ == 0) {
-      // need to read more entries.
-      const int n = sys_getdents(fd_, dent, sizeof(buf_));
-      if (n < 0) {
-        return false;
-      } else if (n == 0) {
-        hit_eof_ = true;
-      } else {
-        buf_used_ += n;
-      }
-    }
-
-    if (buf_used_ == 0 && hit_eof_)
-      return false;
-
-    assert(buf_used_ > 0);
-
-    *name = dent->d_name;
-    return true;
-  }
-
-  void PopEntry() {
-    if (!buf_used_)
-      return;
-
-    const struct kernel_dirent* const dent =
-      reinterpret_cast<kernel_dirent*>(buf_);
-
-    buf_used_ -= dent->d_reclen;
-    memmove(buf_, buf_ + dent->d_reclen, buf_used_);
-  }
-
- private:
-  const int fd_;
-  bool hit_eof_;
-  unsigned buf_used_;
-  uint8_t buf_[sizeof(struct kernel_dirent) + NAME_MAX + 1];
-};
-
-}  // namespace google_breakpad
-
-#endif  // CLIENT_LINUX_HANDLE_DIRECTORY_READER_H_