debug.c

一个在Windows环境下允许用户程序访问USB设备的接口库的源代码.

#include "libusb_filter.h"

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



#define DEBUG_BUFFER_SIZE 1024

static int debug_level = DEBUG_MSG;

void debug_print_nl(void)
{
  if(debug_level) KdPrint((" "));
}

void debug_set_level(int level)
{
  debug_level = level;
}

void debug_printf(int level, char *format, ...)
 {
  char tmp[DEBUG_BUFFER_SIZE];
  va_list args;

  if(level <= debug_level)
    {
      va_start(args, format);
      vsprintf(tmp, format, args);
      va_end(args);
      KdPrint(("LIBUSB_FILTER - %s\n", tmp));
    }
}