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/**
* @file dbg.h
* @brief Debug macros for the minunit framework
* @author Zed Shaw
*
* @details
* These debug macros come from Zed Shaw's book Learn C The Hard Way, and are
* used for the testing framework of GenSVM.
*
* @sa minunit.h
*/
#ifndef __dbg_h__
#define __dbg_h__
#include <stdio.h>
#include <errno.h>
#include <string.h>
#ifdef NDEBUG
/**
* Define debug macro as doing nothing when we don't want debug output
*/
#define debug(M, ...)
#else
/**
* Print debug info to stderr
*/
#define debug(M, ...) fprintf(stderr, "DEBUG %s:%d: " M "\n", __FILE__, \
__LINE__, ##__VA_ARGS__)
#endif
/**
* Return a clean string of the current errno
*/
#define clean_errno() (errno == 0 ? "None" : strerror(errno))
/**
* Log an error to stderr
*/
#define log_err(M, ...) fprintf(stderr, "[ERROR] (%s:%d: errno: %s) " M "\n", \
__FILE__, __LINE__, clean_errno(), ##__VA_ARGS__)
/**
* Log a warning to stderr
*/
#define log_warn(M, ...) fprintf(stderr, "[WARN] (%s:%d: errno: %s) " M "\n", \
__FILE__, __LINE__, clean_errno(), ##__VA_ARGS__)
/**
* Log info to stderr
*/
#define log_info(M, ...) fprintf(stderr, "[INFO] (%s:%d) " M "\n", \
__FILE__, __LINE__, ##__VA_ARGS__)
/**
* Check a condition an log an error with the given message if it fails
*/
#define check(A, M, ...) if(!(A)) { log_err(M, ##__VA_ARGS__); errno=0; \
goto error; }
/**
* Log an error with the given message and reset errno
*/
#define sentinel(M, ...) { log_err(M, ##__VA_ARGS__); errno=0; goto error; }
/**
* Check a memory allocation
*/
#define check_mem(A) check((A), "Out of memory.");
/**
* Check a condition and log to debug if it fails, and reset errno
*/
#define check_debug(A, M, ...) if (!(A)) { debug(M, ##__VA_ARGS__); errno=0; \
goto error; }
#endif
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