usbinfo.c

USB monitor

/* usbinfo.c - Nereid USB Monitor / USB Device Information
 * Copyright (C) 2003 Tachibana Eriko
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
 */

#include <stdio.h>
#include <stdlib.h>

#include "include/usbdef.h"
#include "usbinfo.h"


/* Variables */
UsbInfo usbinfo[1 + DEVADR_MAX];
#define USBINFO_NUM	(sizeof (usbinfo) / sizeof (usbinfo[0]))


/* Functions */
static void init_usbinfo_sub (UsbInfo* p, int flag);


/* 巜掕偟偨僨僶僀僗傾僪儗僗偺僨僶僀僗忣曬僥乕僽儖傪曉偡 */
UsbInfo*
get_usbinfo (int devadr)
{
  if (0 <= devadr && devadr < USBINFO_NUM)
    return &usbinfo[devadr];

  printf ("get_usbinfo: 晄惓側僨僶僀僗傾僪儗僗偱偡.\n");
  return NULL;
}


/* 僨僶僀僗傾僪儗僗 0 梡偺僥乕僽儖傪曉偡 */
UsbInfo*
alloc_usbinfo0 (void)
{
  UsbInfo* p = &usbinfo[0];

  init_usbinfo (p);
  return p;
}


/* 嬻偒僥乕僽儖(亖僨僶僀僗傾僪儗僗)傪曉偡 */
UsbInfo*
alloc_usbinfo (void)
{
  int i;

  for (i = 1; i < USBINFO_NUM; ++i)
    {
      if (usbinfo[i].phase == PHASE_UNPLUGGED)
	return &usbinfo[i];
    }

  printf ("alloc_usbinfo: 僨僶僀僗忣曬僥乕僽儖偑堦攖偱偡.\n");
  return NULL;
}


/* 僨僶僀僗忣曬僥乕僽儖傪夝曻偡傞 */
void
free_usbinfo (UsbInfo* p)
{
  if (p != NULL)
    init_usbinfo (p);
}


/* 僨僶僀僗忣曬僥乕僽儖傪慡偰弶婜壔偡傞 */
void
init_all_usbinfo (void)
{
  static int init_flag = 0;
  int i;

  for (i = 0; i < USBINFO_NUM; ++i)
    init_usbinfo_sub (&usbinfo[i], init_flag);

  init_flag = 1;
}


/* 僨僶僀僗忣曬僥乕僽儖傪弶婜壔偡傞 */
void
init_usbinfo (UsbInfo* p)
{
  init_usbinfo_sub (p, 1);
}

static void
init_usbinfo_sub (UsbInfo* p, int flag)
{
  int devadr = p - usbinfo;

  /* 攋夡僠僃僢僋丄僶僢僼傽夝曻 */
  if (flag == 1)
    {
      if (p->devadr != devadr)
	printf ("init_usbinfo: 僨僶僀僗傾僪儗僗偑攋夡偝傟偰偄傑偡(%d).\n", devadr);
      free (p->confdescp);
    }

  p->devadr = devadr;
  p->bMaxPacketSize0 = 0;
  p->confno = 0;
  p->hubadr = 0;
  p->hubport = 0;
  p->phase = PHASE_UNPLUGGED;
  p->speed = SPEED_UNKNOWN;
  p->confdescp = NULL;
  p->total_confdesc = 0;
}


/* EOF */