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73 lines
2.5 KiB
C++
73 lines
2.5 KiB
C++
// -*- Mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*-
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// Copyright (c) 2008, Google Inc.
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// All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following disclaimer
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// in the documentation and/or other materials provided with the
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// distribution.
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// * Neither the name of Google Inc. nor the names of its
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// contributors may be used to endorse or promote products derived from
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// this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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// ---
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// Author: sanjay@google.com (Sanjay Ghemawat)
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#include <config.h>
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#include <stdarg.h>
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#include <stdio.h>
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#include "raw_printer.h"
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#include "base/logging.h"
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namespace base {
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RawPrinter::RawPrinter(char* buf, int length)
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: base_(buf),
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ptr_(buf),
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limit_(buf + length - 1) {
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RAW_DCHECK(length > 0, "");
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*ptr_ = '\0';
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*limit_ = '\0';
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}
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void RawPrinter::Printf(const char* format, ...) {
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if (limit_ > ptr_) {
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va_list ap;
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va_start(ap, format);
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int avail = limit_ - ptr_;
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// We pass avail+1 to vsnprintf() since that routine needs room
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// to store the trailing \0.
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const int r = perftools_vsnprintf(ptr_, avail+1, format, ap);
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va_end(ap);
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if (r < 0) {
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// Perhaps an old glibc that returns -1 on truncation?
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ptr_ = limit_;
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} else if (r > avail) {
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// Truncation
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ptr_ = limit_;
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} else {
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ptr_ += r;
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}
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}
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}
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}
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