lib/libUPnP/Neptune/Source/Core/NptDebug.cpp

   1 /*****************************************************************
   2 |
   3 |   Neptune - Debug Utilities
   4 |
   5 | Copyright (c) 2002-2008, Axiomatic Systems, LLC.
   6 | All rights reserved.
   7 |
   8 | Redistribution and use in source and binary forms, with or without
   9 | modification, are permitted provided that the following conditions are met:
  10 |     * Redistributions of source code must retain the above copyright
  11 |       notice, this list of conditions and the following disclaimer.
  12 |     * Redistributions in binary form must reproduce the above copyright
  13 |       notice, this list of conditions and the following disclaimer in the
  14 |       documentation and/or other materials provided with the distribution.
  15 |     * Neither the name of Axiomatic Systems nor the
  16 |       names of its contributors may be used to endorse or promote products
  17 |       derived from this software without specific prior written permission.
  18 |
  19 | THIS SOFTWARE IS PROVIDED BY AXIOMATIC SYSTEMS ''AS IS'' AND ANY
  20 | EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  21 | WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  22 | DISCLAIMED. IN NO EVENT SHALL AXIOMATIC SYSTEMS BE LIABLE FOR ANY
  23 | DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  24 | (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  25 | LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
  26 | ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  27 | (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  28 | SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  29 |
  30  ****************************************************************/
  31
  32 /*----------------------------------------------------------------------
  33 |   includes
  34 +---------------------------------------------------------------------*/
  35 #include <stdarg.h>
  36 #include "NptUtils.h"
  37 #include "NptDebug.h"
  38
  39 /*----------------------------------------------------------------------
  40 |   constants
  41 +---------------------------------------------------------------------*/
  42 #define NPT_DEBUG_LOCAL_BUFFER_SIZE 1024
  43 #define NPT_DEBUG_BUFFER_INCREMENT  4096
  44 #define NPT_DEBUG_BUFFER_MAX_SIZE   65536
  45
  46 /*----------------------------------------------------------------------
  47 |   NPT_Debug
  48 +---------------------------------------------------------------------*/
  49 void
  50 NPT_Debug(const char* format, ...)
  51 {
  52 #if defined(NPT_DEBUG)
  53     char         local_buffer[NPT_DEBUG_LOCAL_BUFFER_SIZE];
  54     unsigned int buffer_size = NPT_DEBUG_LOCAL_BUFFER_SIZE;
  55     char*        buffer = local_buffer;
  56     va_list      args;
  57
  58     va_start(args, format);
  59
  60     for(;;) {
  61         int result;
  62
  63         /* try to format the message (it might not fit) */
  64         result = NPT_FormatStringVN(buffer, buffer_size-1, format, args);
  65         buffer[buffer_size-1] = 0; /* force a NULL termination */
  66         if (result >= 0) break;
  67
  68         /* the buffer was too small, try something bigger */
  69         buffer_size = (buffer_size+NPT_DEBUG_BUFFER_INCREMENT)*2;
  70         if (buffer_size > NPT_DEBUG_BUFFER_MAX_SIZE) break;
  71         if (buffer != local_buffer) delete[] buffer;
  72         buffer = new char[buffer_size];
  73         if (buffer == NULL) return;
  74     }
  75
  76     NPT_DebugOutput(buffer);
  77     if (buffer != local_buffer) delete[] buffer;
  78
  79     va_end(args);
  80 #else
  81     NPT_COMPILER_UNUSED(format);
  82 #endif
  83 }