debug.c

#include "debug.h"

#include <stdarg.h>
#include <stdio.h>
#include <time.h>

static const char *debug_log_path = "ghostling-debug.log";

void debug_log_reset(void)
{
    FILE *f = fopen(debug_log_path, "w");
    if (!f)
        return;
    fputs("ghostling debug log\n", f);
    fclose(f);
}

void debug_log(const char *fmt, ...)
{
    FILE *f = fopen(debug_log_path, "a");
    if (!f)
        return;

    time_t now = time(NULL);
    struct tm tm_now;
#if defined(_WIN32)
    localtime_s(&tm_now, &now);
#else
    localtime_r(&now, &tm_now);
#endif
    fprintf(f, "[%02d:%02d:%02d] ", tm_now.tm_hour, tm_now.tm_min, tm_now.tm_sec);

    va_list args;
    va_start(args, fmt);
    vfprintf(f, fmt, args);
    va_end(args);
    fputc('\n', f);
    fclose(f);
}