src/gallium/auxiliary/os/os_stream.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2010 Luca Barbieri
   4  *
   5  * Permission is hereby granted, free of charge, to any person obtaining
   6  * a copy of this software and associated documentation files (the
   7  * "Software"), to deal in the Software without restriction, including
   8  * without limitation the rights to use, copy, modify, merge, publish,
   9  * distribute, sublicense, and/or sell copies of the Software, and to
  10  * permit persons to whom the Software is furnished to do so, subject to
  11  * the following conditions:
  12  *
  13  * The above copyright notice and this permission notice (including the
  14  * next paragraph) shall be included in all copies or substantial
  15  * portions of the Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  18  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  19  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
  20  * IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
  21  * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  22  * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  23  * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  24  *
  25  **************************************************************************/
  26
  27 #include "pipe/p_config.h"
  28
  29 #include "os_stream.h"
  30 #include "util/u_memory.h"
  31 #include "util/u_string.h"
  32
  33 int
  34 os_default_stream_vprintf (struct os_stream* stream, const char *format, va_list ap)
  35 {
  36    char buf[1024];
  37    int retval;
  38    va_list ap2;
  39    va_copy(ap2, ap);
  40    retval = util_vsnprintf(buf, sizeof(buf), format, ap2);
  41    va_end(ap2);
  42    if(retval <= 0)
  43    {}
  44    else if(retval < sizeof(buf))
  45       stream->write(stream, buf, retval);
  46    else
  47    {
  48       char* str = MALLOC(retval + 1);
  49       if(!str)
  50          return -1;
  51       retval = util_vsnprintf(str, retval + 1, format, ap);
  52       if(retval > 0)
  53          stream->write(stream, str, retval);
  54       FREE(str);
  55    }
  56
  57    return retval;
  58 }