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log.h
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#ifndef __LOG_H__
#define __LOG_H__
#ifdef LOG_TO_LOGCAT
#include <log/log.h>
#endif
#ifndef LOG_LEVEL
#define LOG_LEVEL LOG_LEVEL_ERROR
#endif
#define LOG_LEVEL_SILENCE (0)
#define LOG_LEVEL_ERROR (1)
#define LOG_LEVEL_INFO (2)
#define LOG_LEVEL_DEBUG (3)
/*
#define LOG_TO_TERM (0)
#define LOG_TO_LOGCAT (1)
#ifdef LOG_TO_TERM
#define PRINTE(fmt, arg...) do {\
printf("[E] %s: +%d %s(): "fmt, LOG_TAG, __LINE__, __func__, ##arg);\
} while(0)
#define PRINTI(fmt, arg...) do {\
printf("[I] %s: +%d %s(): "fmt, LOG_TAG, __LINE__, __func__, ##arg);\
} while(0)
#define PRINTD(fmt, arg...) do {\
printf("[D] %s: +%d %s(): "fmt, LOG_TAG, __LINE__, __func__, ##arg);\
} while(0)
#define log printf
#endif
*/
#ifdef LOG_TO_LOGCAT
#define PRINTE(fmt, arg...) do {\
ALOGE(" +%d %s(): "fmt, __LINE__, __func__, ##arg);\
} while(0)
#define PRINTI(fmt, arg...) do {\
ALOGI(" +%d %s(): "fmt, __LINE__, __func__, ##arg);\
} while(0)
#define PRINTD(fmt, arg...) do {\
ALOGD(" +%d %s(): "fmt, __LINE__, __func__, ##arg);\
} while(0)
#define log ALOGI
#else
#define PRINTE(fmt, arg...) do {\
printf("[E] %s: +%d %s(): "fmt, LOG_TAG, __LINE__, __func__, ##arg);\
} while(0)
#define PRINTI(fmt, arg...) do {\
printf("[I] %s: "fmt, LOG_TAG, ##arg);\
} while(0)
#define PRINTD(fmt, arg...) do {\
printf("[D] %s: "fmt, LOG_TAG, ##arg);\
} while(0)
#define log printf
#endif
#define debug_level(level, fmt, arg...) do {\
if (level <= LOG_LEVEL) {\
if (level == LOG_LEVEL_ERROR) {\
PRINTE(fmt, ##arg); \
} else if (level == LOG_LEVEL_INFO) {\
PRINTI(fmt, ##arg); \
} else if (level == LOG_LEVEL_DEBUG) {\
PRINTD(fmt, ##arg); \
}\
}\
} while (0)
#define LOG_E(fmt, arg...) debug_level(LOG_LEVEL_ERROR, fmt, ##arg)
#define LOG_I(fmt, arg...) debug_level(LOG_LEVEL_INFO, fmt, ##arg)
#define LOG_D(fmt, arg...) debug_level(LOG_LEVEL_DEBUG, fmt, ##arg)
#define could_error() (LOG_LEVEL_ERROR <= LOG_LEVEL)
#define could_info() (LOG_LEVEL_INFO <= LOG_LEVEL)
#define could_debug() (LOG_LEVEL_DEBUG <= LOG_LEVEL)
#define log_e(fmt, arg...) if(could_error()) log(fmt, ##arg)
#define log_i(fmt, arg...) if(could_info()) log(fmt, ##arg)
#define log_d(fmt, arg...) if(could_debug()) log(fmt, ##arg)
#endif