15821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Copyright (c) 2008, Google Inc. 25821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// All rights reserved. 35821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// 45821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Redistribution and use in source and binary forms, with or without 55821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// modification, are permitted provided that the following conditions are 65821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// met: 75821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// 85821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// * Redistributions of source code must retain the above copyright 95821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// notice, this list of conditions and the following disclaimer. 105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// * Redistributions in binary form must reproduce the above 115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// copyright notice, this list of conditions and the following disclaimer 125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// in the documentation and/or other materials provided with the 135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// distribution. 145821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// * Neither the name of Google Inc. nor the names of its 155821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// contributors may be used to endorse or promote products derived from 165821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// this software without specific prior written permission. 175821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// 185821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 205821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 215821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 225821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 235821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 245821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 255821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 265821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 275821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 285821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 295821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 305821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// --- 315821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Author: sanjay@google.com (Sanjay Ghemawat) 325821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 335821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include <config.h> 345821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include <stdarg.h> 355821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include <stdio.h> 365821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "raw_printer.h" 375821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "base/logging.h" 385821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 395821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)namespace base { 405821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 415821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)RawPrinter::RawPrinter(char* buf, int length) 425821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) : base_(buf), 435821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ptr_(buf), 445821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) limit_(buf + length - 1) { 455821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) RAW_DCHECK(length > 0, ""); 465821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) *ptr_ = '\0'; 475821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) *limit_ = '\0'; 485821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 495821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 505821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void RawPrinter::Printf(const char* format, ...) { 515821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (limit_ > ptr_) { 525821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) va_list ap; 535821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) va_start(ap, format); 545821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) int avail = limit_ - ptr_; 555821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // We pass avail+1 to vsnprintf() since that routine needs room 565821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // to store the trailing \0. 575821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const int r = perftools_vsnprintf(ptr_, avail+1, format, ap); 585821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) va_end(ap); 595821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (r < 0) { 605821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Perhaps an old glibc that returns -1 on truncation? 615821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ptr_ = limit_; 625821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } else if (r > avail) { 635821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Truncation 645821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ptr_ = limit_; 655821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } else { 665821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ptr_ += r; 675821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 685821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 695821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 705821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 715821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 72