Logger

// Module: log.c // // logging library // ANSI escape codes: // gist.github.com/fnky/458719343aabd01cfb17a3a4f7296797

1. include <stdio.h>
2. include <stdint.h>
3. include <stdlib.h>
4. include <time.h>
5. include "log.h"
6. include <unistd.h>

1. ifndef u8
2. define u8 uint8_t
3. define s8 int8_t
4. endif

// Define ANSI colors, to be used within printf() text // The foreground colors 30 - 38, are the "normal" darker colors // The foreground colors 90 - 98, are the "bright" lighter colors // These #defines rely on string concatenation to function as desired

1. define COLOR_YELLOW_ON_BLACK "\033[93m\033[40m"
2. define COLOR_YELLOW_ON_BLUE "\033[93m\033[44m"
3. define COLOR_YELLOW_ON_GREEN "\033[93m\033[42m"
4. define COLOR_YELLOW_ON_RED "\033[93m\033[41m"
5. define COLOR_YELLOW_ON_VIOLET "\033[93m\033[45m"
6. define COLOR_WHITE
7. define COLOR_RED
8. define COLOR_GREEN "\033[92m" /* Bright Green text */
9. define COLOR_VIOLET "\033[95m" /* Bright Violet text */
10. define COLOR_YELLOW "\033[93m" /* Bright Yellow text */
11. define COLOR_RESET "\033[0m" /* Reset text color to previous color */

1. define TEXT_ADMIN "\e[31m"
2. define TEXT_ORANGE "\e[38;5;202m"
3. define TEXT_BROWN "\e[38;5;130m"
4. define TEXT_YELLOW "\e[93m"
5. define TEXT_PUKE "\e[33m"
6. define TEXT_LIME "\e[92m"
7. define TEXT_GREEN "\e[32m"`
8. define TEXT_AQUA "\e[96m"

1. define MAX_LOG_ITEM 150 // maximum number of bytes for a log (with length, time, level, and text

// Definition of a "log item": typedef struct { u8 length; // includes sizeof(time), sizeof(level), strlen(text) u8 time[4]; // 32 bits, stored in network byte order, MSB first (index 0) u8 level; char text[MAX_LOG_ITEM-6]; // log text } log_item_t;

// Implementation rules / notes: // 1) Use a "staging buffer" of some max length to write formatted text into // This buffer will NOT contain ANSI color escapes or line termination. // 2) A small data structure is used on the front of the "log item" to // contain time stamp, log level, and string length. // u8 length - bytes following

uint32_t get_time(void) { uint32_t milliseconds; struct timespec ts; if (clock_gettime(CLOCK_MONOTONIC_RAW /*CLOCK_MONOTONIC*/, &ts) == -1) { perror("clock_gettime");

       exit(EXIT_FAILURE);
  }
  milliseconds = (ts.tv_sec * 1000) + (ts.tv_nsec / 1000000); // convert seconds into milliseconds & nanoseconds into milliseconds
  printf("%s: %u\n",__func__,milliseconds);
  return milliseconds;

}

int main(int argc, const char* argv[]) { get_time(); printf(COLOR_VIOLET "COLOR_VIOLET" COLOR_RESET "\n");

for(int ansi = 30; ansi<=37; ansi++) printf("\033[%dm Foreground Color: %d\033[0m\n",ansi,ansi);

for(int ansi = 90; ansi<=97; ansi++) printf("\033[%dm Foreground Color: %d\033[0m\n",ansi,ansi);

for(int ansi = 40; ansi<=47; ansi++) printf("\033[%dm Background Color: %d\033[0m\n",ansi,ansi);

for(int ansi = 100; ansi<=107; ansi++) printf("\033[%dm Background Color: %d\033[0m\n",ansi,ansi);

usleep(1000); get_time(); return 0; }