| // -*- Mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*- |
| // Copyright (c) 2008, 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. |
| |
| // --- |
| // Author: sanjay@google.com (Sanjay Ghemawat) |
| |
| #include <config.h> |
| #include <stdarg.h> |
| #include <stdio.h> |
| #include "raw_printer.h" |
| #include "base/logging.h" |
| |
| namespace base { |
| |
| RawPrinter::RawPrinter(char* buf, int length) |
| : base_(buf), |
| ptr_(buf), |
| limit_(buf + length - 1) { |
| RAW_DCHECK(length > 0, ""); |
| *ptr_ = '\0'; |
| *limit_ = '\0'; |
| } |
| |
| void RawPrinter::Printf(const char* format, ...) { |
| if (limit_ > ptr_) { |
| va_list ap; |
| va_start(ap, format); |
| int avail = limit_ - ptr_; |
| // We pass avail+1 to vsnprintf() since that routine needs room |
| // to store the trailing \0. |
| const int r = perftools_vsnprintf(ptr_, avail+1, format, ap); |
| va_end(ap); |
| if (r < 0) { |
| // Perhaps an old glibc that returns -1 on truncation? |
| ptr_ = limit_; |
| } else if (r > avail) { |
| // Truncation |
| ptr_ = limit_; |
| } else { |
| ptr_ += r; |
| } |
| } |
| } |
| |
| } |