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134 lines
4.8 KiB
C++
134 lines
4.8 KiB
C++
/* ******************************************************************
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debug
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Part of FSE library
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Copyright (C) 2013-present, Yann Collet.
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BSD 2-Clause License (http://www.opensource.org/licenses/bsd-license.php)
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are
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met:
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* Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above
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copyright notice, this list of conditions and the following disclaimer
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in the documentation and/or other materials provided with the
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distribution.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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You can contact the author at :
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- Source repository : https://github.com/Cyan4973/FiniteStateEntropy
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****************************************************************** */
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/*
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* The purpose of this header is to enable debug functions.
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* They regroup assert(), DEBUGLOG() and RAWLOG() for run-time,
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* and DEBUG_STATIC_ASSERT() for compile-time.
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*
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* By default, DEBUGLEVEL==0, which means run-time debug is disabled.
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*
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* Level 1 enables assert() only.
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* Starting level 2, traces can be generated and pushed to stderr.
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* The higher the level, the more verbose the traces.
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*
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* It's possible to dynamically adjust level using variable g_debug_level,
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* which is only declared if DEBUGLEVEL>=2,
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* and is a global variable, not multi-thread protected (use with care)
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*/
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#ifndef DEBUG_H_12987983217
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#define DEBUG_H_12987983217
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#if defined (__cplusplus)
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extern "C" {
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#endif
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/* static assert is triggered at compile time, leaving no runtime artefact.
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* static assert only works with compile-time constants.
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* Also, this variant can only be used inside a function. */
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#define DEBUG_STATIC_ASSERT(c) (void)sizeof(char[(c) ? 1 : -1])
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/* DEBUGLEVEL is expected to be defined externally,
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* typically through compiler command line.
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* Value must be a number. */
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#ifndef DEBUGLEVEL
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# define DEBUGLEVEL 0
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#endif
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/* DEBUGFILE can be defined externally,
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* typically through compiler command line.
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* note : currently useless.
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* Value must be stderr or stdout */
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#ifndef DEBUGFILE
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# define DEBUGFILE stderr
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#endif
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/* recommended values for DEBUGLEVEL :
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* 0 : release mode, no debug, all run-time checks disabled
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* 1 : enables assert() only, no display
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* 2 : reserved, for currently active debug path
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* 3 : events once per object lifetime (CCtx, CDict, etc.)
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* 4 : events once per frame
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* 5 : events once per block
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* 6 : events once per sequence (verbose)
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* 7+: events at every position (*very* verbose)
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*
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* It's generally inconvenient to output traces > 5.
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* In which case, it's possible to selectively trigger high verbosity levels
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* by modifying g_debug_level.
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*/
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#if (DEBUGLEVEL>=1)
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# include <assert.h>
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#else
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# ifndef assert /* assert may be already defined, due to prior #include <assert.h> */
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# define assert(condition) ((void)0) /* disable assert (default) */
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# endif
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#endif
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#if (DEBUGLEVEL>=2)
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# include <stdio.h>
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extern int g_debuglevel; /* the variable is only declared,
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it actually lives in debug.c,
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and is shared by the whole process.
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It's not thread-safe.
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It's useful when enabling very verbose levels
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on selective conditions (such as position in src) */
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# define RAWLOG(l, ...) { \
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if (l<=g_debuglevel) { \
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fprintf(stderr, __VA_ARGS__); \
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} }
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# define DEBUGLOG(l, ...) { \
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if (l<=g_debuglevel) { \
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fprintf(stderr, __FILE__ ": " __VA_ARGS__); \
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fprintf(stderr, " \n"); \
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} }
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#else
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# define RAWLOG(l, ...) {} /* disabled */
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# define DEBUGLOG(l, ...) {} /* disabled */
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#endif
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#if defined (__cplusplus)
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}
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#endif
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#endif /* DEBUG_H_12987983217 */
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