error.c

来自「This libusb version 0.1.12. libusb is a 」· C语言 代码 · 共 37 行

/*
 * USB Error messages
 *
 * Copyright (c) 2000-2001 Johannes Erdfelt <[e-mail]>
 *
 * This library is covered by the LGPL, read LICENSE for details.
 */

#include <errno.h>
#include <string.h>

#include "usb.h"
#include "error.h"

char usb_error_str[1024] = "";
int usb_error_errno = 0;
usb_error_type_t usb_error_type = USB_ERROR_TYPE_NONE;

char *usb_strerror(void)
{
  switch (usb_error_type) {
  case USB_ERROR_TYPE_NONE:
    return "No error";
  case USB_ERROR_TYPE_STRING:
    return usb_error_str;
  case USB_ERROR_TYPE_ERRNO:
    if (usb_error_errno > -USB_ERROR_BEGIN)
      return strerror(usb_error_errno);
    else
      /* Any error we don't know falls under here */
      return "Unknown error";
  }

  return "Unknown error";
}