log.h

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#ifndef LOG_H
#define LOG_H
 
#include <stdarg.h>
#include <stdbool.h>
#include <stdio.h>
#include <inttypes.h>
#include <string.h>
 
#define LOG_VERSION "0.1.0"
#define __FILENAME__ strrchr("/" __FILE__, '/') + 1
#define MAX_LOG_LEVELS 5
 
typedef void (*log_lock_fn)(bool lock);
 
enum { LOGC_TRACE, LOGC_DEBUG, LOGC_INFO, LOGC_WARN, LOGC_ERROR };
 
#define LEVEL_NAMES                                                            \
  { "TRACE", "DEBUG", "INFO", "WARN", "ERROR" }
#define LEVEL_COLORS                                                           \
  { "\x1b[94m", "\x1b[36m", "\x1b[32m", "\x1b[33m", "\x1b[31m" }
 
#if defined __has_attribute
#if __has_attribute(format)
#define PRINTF_FORMAT(a, b) __attribute__((format(printf, (a), (b))))
#else
#define PRINTF_FORMAT(a, b)
#endif /* __has_attribute(format) */
#else
#define PRINTF_FORMAT(a, b)
#endif /* defined __has_attribute */
 
static inline int snprintf_error(size_t size, int res) {
  return res < 0 || (unsigned int)res >= size;
}
 
#define log_trace(...)                                                         \
  log_levels(LOGC_TRACE, __FILENAME__, __LINE__, __VA_ARGS__)
#define log_debug(...)                                                         \
  log_levels(LOGC_DEBUG, __FILENAME__, __LINE__, __VA_ARGS__)
#define log_info(...) log_levels(LOGC_INFO, __FILENAME__, __LINE__, __VA_ARGS__)
#define log_warn(...) log_levels(LOGC_WARN, __FILENAME__, __LINE__, __VA_ARGS__)
#define log_error(...)                                                         \
  log_levels(LOGC_ERROR, __FILENAME__, __LINE__, __VA_ARGS__)
#define log_errno(...)                                                         \
  log_errno_error(LOGC_ERROR, __FILENAME__, __LINE__, __VA_ARGS__)
 
#define log_err_ex(...)                                                        \
  log_error_exit(LOGC_ERROR, __FILENAME__, __LINE__, __VA_ARGS__)
#define log_err_exp(...)                                                       \
  log_error_exit_proc(LOGC_ERROR, __FILENAME__, __LINE__, __VA_ARGS__)
 
void log_set_udata(void *udata);
void log_set_lock(log_lock_fn fn);
void log_set_level(uint8_t level);
void log_set_quiet(bool enable);
void log_set_color(bool enable);
void log_set_meta(bool enable);
int log_open_file(char *path);
void log_close_file(void);
 
PRINTF_FORMAT(4, 5)
void log_levels(uint8_t level, const char *file, uint32_t line,
                const char *format, ...);
PRINTF_FORMAT(4, 5)
void log_errno_error(uint8_t level, const char *file, uint32_t line,
                     const char *format, ...);
PRINTF_FORMAT(4, 5)
void log_error_exit(uint8_t level, const char *file, uint32_t line,
                    const char *format, ...);
PRINTF_FORMAT(4, 5)
void log_error_exit_proc(uint8_t level, const char *file, uint32_t line,
                         const char *format, ...);
 
size_t printf_hex(char *buf, size_t buf_size, const uint8_t *data, size_t len,
                  bool uppercase);
#endif