logging.c

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#include "config.h"
#include <errno.h>
#include <stdarg.h>
#include <stdbool.h>
#include <stdio.h>
#include <string.h>
#include <time.h>
#include "mutt/lib.h"
#include "lib.h"
 
bool DebugLogColor = false;     
bool DebugLogLevel = false;     
bool DebugLogTimestamp = false; 
 
extern const char *LevelAbbr;

static int log_timestamp(char *buf, size_t buflen, time_t time)
{
  return mutt_date_localtime_format(buf, buflen, "[%H:%M:%S]", time);
}

static int log_level(char *buf, size_t buflen, enum LogLevel level)
{
  return snprintf(buf, buflen, "<%c>", LevelAbbr[level + 3]);
}

int log_disp_debug(time_t stamp, const char *file, int line, const char *function,
                   enum LogLevel level, const char *format, ...)
{
  char buf[LOG_LINE_MAX_LEN] = { 0 };
  size_t buflen = sizeof(buf);
  int err = errno;
  int colour = 0;
  int bytes = 0;
 
  if (DebugLogColor)
  {
    switch (level)
    {
      case LL_PERROR:
      case LL_ERROR:
        colour = 31;
        break;
      case LL_WARNING:
        colour = 33;
        break;
      case LL_MESSAGE:
      default:
        break;
    }
 
    if (colour > 0)
    {
      bytes += snprintf(buf + bytes, buflen - bytes, "\033[1;%dm", colour); // Escape
    }
  }
 
  if (DebugLogTimestamp)
  {
    bytes += log_timestamp(buf + bytes, buflen - bytes, stamp);
  }
 
  if (DebugLogLevel)
  {
    bytes += log_level(buf + bytes, buflen - bytes, level);
  }
 
  va_list ap;
  va_start(ap, format);
  bytes += vsnprintf(buf + bytes, buflen - bytes, format, ap);
  va_end(ap);
 
  if (level == LL_PERROR)
    bytes += snprintf(buf + bytes, buflen - bytes, ": %s", strerror(err));
 
  if (colour > 0)
  {
    bytes += snprintf(buf + bytes, buflen - bytes, "\033[0m"); // Escape
  }
 
  if (level < LL_DEBUG1)
    bytes += snprintf(buf + bytes, buflen - bytes, "\n");
 
  fputs(buf, stdout);
  return bytes;
}