debug macros for C/C++ and maybe JNI android development

dbg.h

#ifndef __dbg_h__
#define __dbg_h__

#include <stdio.h>
#include <errno.h>
#include <string.h>

// Debug tag
#define DTAG "DBG"

#ifdef __ANDROID__
#include <android/log.h> // Android.mk => LOCAL_LDLIBS := -L$(SYSROOT)/usr/lib -llog
#ifdef NDEBUG
#define debug(D, M, ...)
#else
#define debug(D, M, ...) __android_log_print(ANDROID_LOG_ERROR, D, "DEBUG %s:%d: " M "", __FILE__, __LINE__, ##__VA_ARGS__)
#endif

#define clean_errno() (errno == 0 ? "None" : strerror(errno))

#define log_err(D, M, ...) __android_log_print(ANDROID_LOG_ERROR, D, "[ERROR] (%s:%d: errno: %s) " M "", __FILE__, __LINE__, clean_errno(), ##__VA_ARGS__)

#define log_warn(D, M, ...) __android_log_print(ANDROID_LOG_WARN, D, "[WARN] (%s:%d: errno: %s) " M "", __FILE__, __LINE__, clean_errno(), ##__VA_ARGS__)

#define log_info(D, M, ...) __android_log_print(ANDROID_LOG_INFO, D, "[INFO] " M "", ##__VA_ARGS__)

#define log_debug(D, M, ...) __android_log_print(ANDROID_LOG_DEBUG, D, "[DEBUG] (%s:%d) " M "", __FILE__, __LINE__, ##__VA_ARGS__)

#define check(A, D, M, ...) errno=0; if(!(A)) { log_err(D, M, ##__VA_ARGS__); errno=0; goto error; }

#define check_zero(A, D, M, ...) check(A==0, D, M, ##__VA_ARGS__)

#define sentinel(D, M, ...)  { log_err(D, M, ##__VA_ARGS__); errno=0; goto error; }

#define check_mem(A, D) check((A), D, "Out of memory.")

#define check_debug(A, D, M, ...) if(!(A)) { debug(D, M, ##__VA_ARGS__); errno=0; goto error; }

#endif // __ANDROID__

#ifdef NDEBUG
#define debug(D, M, ...)
#else
#define debug(D, M, ...) fprintf(stderr, D ": DEBUG %s:%d: " M "", __FILE__, __LINE__, ##__VA_ARGS__)
#endif

#define clean_errno() (errno == 0 ? "None" : strerror(errno))

#define log_err(D, M, ...) fprintf(stderr, D ": [ERROR] (%s:%d: errno: %s) " M "", __FILE__, __LINE__, clean_errno(), ##__VA_ARGS__)

#define log_warn(D, M, ...) fprintf(stderr, D ": [WARN] (%s:%d: errno: %s) " M "", __FILE__, __LINE__, clean_errno(), ##__VA_ARGS__)

#define log_info(D, M, ...) fprintf(stderr, D ": [INFO] " M "", ##__VA_ARGS__)

#define log_debug(D, M, ...) fprintf(stderr, D ": [DEBUG] (%s:%d) " M "", __FILE__, __LINE__, ##__VA_ARGS__)

#define check(A, D, M, ...) errno=0; if(!(A)) { log_err(D, M, ##__VA_ARGS__); errno=0; goto error; }

#define check_zero(A, D, M, ...) check(A==0, D, M, ##__VA_ARGS__)

#define sentinel(D, M, ...)  { log_err(D, M, ##__VA_ARGS__); errno=0; goto error; }

#define check_mem(A, D) check((A), D ": Out of memory.")

#define check_debug(A, D, M, ...) if(!(A)) { debug(D, M, ##__VA_ARGS__); errno=0; goto error; }

#endif // _dbg_h_