/usr/include/plplot/pldebug.h is in libplplot-dev 5.9.9-2ubuntu2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 | // $Id: pldebug.h 11269 2010-10-22 00:25:36Z airwin $
//
// Copyright (C) 1995 by Maurice J. LeBrun
//
// Debugging support for PLplot.
//
// This software may be freely copied, modified and redistributed without
// fee provided that this copyright notice is preserved intact on all
// copies and modified copies.
//
// There is no warranty or other guarantee of fitness of this software.
// It is provided solely "as is". The author(s) disclaim(s) all
// responsibility and liability with respect to this software's usage or
// its effect upon hardware or computer systems.
//
#ifndef __PLDEBUG_H__
#define __PLDEBUG_H__
#include <stdarg.h>
// For the truly desperate debugging task
#ifdef DEBUG_ENTER
#define dbug_enter( a ) \
if ( plsc->debug ) \
fprintf( stderr, " entered %s (%s, line %d)\n", a, __FILE__, __LINE__ );
#else
#define dbug_enter( a )
#endif
// If we're using a debugging malloc, include the header file here
#ifdef DEBUGGING_MALLOC
#include <malloc.h>
#endif
//--------------------------------------------------------------------------
// pldebug()
//
// Included into every plplot source file to control debugging output. To
// enable printing of debugging output, you must #define DEBUG before
// including plplotP.h or specify -DDEBUG in the compile line, for each file
// that you want to have debug output enabled. When running the program you
// must in addition specify -debug. This allows debugging output to tailored
// to many different circumstances but otherwise be fairly unobtrusive.
//
// Note, any file that actually uses pldebug() must also define NEED_PLDEBUG
// before the plplotP.h include. This is to eliminate warnings caused by
// those files in which this is defined but never referenced. All this could
// be much nicer if CPP had the abilities of m4, sigh..
//
// Syntax:
// pldebug(label, format [, arg1, arg2, ...] );
//
// The label is typically the calling function name.
//--------------------------------------------------------------------------
#ifdef NEED_PLDEBUG
static void
pldebug( const char *label, ... )
{
#ifdef DEBUG
va_list args;
char *fmt;
if ( plsc->debug )
{
if ( plsc->termin )
c_pltext();
va_start( args, label );
// print out identifying tag
fprintf( stderr, "%s: ", label );
// print out remainder of message
// Need to get fmt BEFORE it's used in the vfprintf
fmt = (char *) va_arg( args, char * );
vfprintf( stderr, fmt, args );
va_end( args );
if ( plsc->termin )
c_plgra();
}
#endif // DEBUG
}
#endif // NEED_PLDEBUG
#endif // __PLDEBUG_H__
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