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// -*- 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;
}
}
}
}
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