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/*
* $Id: pa_log.c $
* Portable Audio I/O Library Multi-Host API front end
* Validate function parameters and manage multiple host APIs.
*
* Based on the Open Source API proposed by Ross Bencina
* Copyright (c) 1999-2006 Ross Bencina, Phil Burk
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files
* (the "Software"), to deal in the Software without restriction,
* including without limitation the rights to use, copy, modify, merge,
* publish, distribute, sublicense, and/or sell copies of the Software,
* and to permit persons to whom the Software is furnished to do so,
* subject to the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR
* ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
* CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
/*
* The text above constitutes the entire PortAudio license; however,
* the PortAudio community also makes the following non-binding requests:
*
* Any person wishing to distribute modifications to the Software is
* requested to send the modifications to the original developer so that
* they can be incorporated into the canonical version. It is also
* requested that these non-binding requests be included along with the
* license above.
*/
/** @file
@ingroup common_src
@brief Implements log function.
PaUtil_SetLogPrintFunction can be user called to replace the provided
DefaultLogPrint function, which writes to stderr.
One can NOT pass var_args across compiler/dll boundaries as it is not
"byte code/abi portable". So the technique used here is to allocate a local
a static array, write in it, then callback the user with a pointer to its
start.
@todo Consider allocating strdump using dynamic allocation.
@todo Consider reentrancy and possibly corrupted strdump buffer.
*/
#include <stdio.h>
#include <stdarg.h>
#include "pa_debugprint.h"
static PaUtilLogCallback userCB=0;
void PaUtil_SetDebugPrintFunction(PaUtilLogCallback cb)
{
userCB = cb;
}
/*
If your platform doesn’t have vsnprintf, you are stuck with a
VERY dangerous alternative, vsprintf (with no n)
*/
#if _MSC_VER
/* Some Windows Mobile SDKs don't define vsnprintf but all define _vsnprintf (hopefully).
According to MSDN "vsnprintf is identical to _vsnprintf". So we use _vsnprintf with MSC.
*/
#define VSNPRINTF _vsnprintf
#else
#define VSNPRINTF vsnprintf
#endif
#define SIZEDUMP 1024
static char strdump[SIZEDUMP];
void PaUtil_DebugPrint( const char *format, ... )
{
if (userCB)
{
va_list ap;
va_start( ap, format );
VSNPRINTF( strdump, SIZEDUMP, format, ap );
userCB(strdump);
va_end( ap );
}
else
{
va_list ap;
va_start( ap, format );
vfprintf( stderr, format, ap );
va_end( ap );
fflush( stderr );
}
}
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