593 lines
20 KiB
C
593 lines
20 KiB
C
/*
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* kbd.c
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*
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* Copyright (c) 2004 Maksim Yevmenkin <m_evmenkin@yahoo.com>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $Id: kbd.c,v 1.2 2004/11/17 21:59:42 max Exp $
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* $FreeBSD$
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*/
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#include <sys/consio.h>
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#include <sys/ioctl.h>
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#include <sys/kbio.h>
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#include <sys/queue.h>
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#include <sys/wait.h>
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#include <assert.h>
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#include <bluetooth.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <limits.h>
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#include <stdarg.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <syslog.h>
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#include <unistd.h>
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#include "bthidd.h"
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#include "kbd.h"
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static void kbd_write(bitstr_t *m, int fb, int make, int fd);
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static int kbd_xlate(int code, int make, int *b, int const *eob);
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/*
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* HID code to PS/2 set 1 code translation table.
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*
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* http://www.microsoft.com/whdc/device/input/Scancode.mspx
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*
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* The table only contains "make" (key pressed) codes.
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* The "break" (key released) code is generated as "make" | 0x80
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*/
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#define E0PREFIX (1 << 31)
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#define NOBREAK (1 << 30)
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#define CODEMASK (~(E0PREFIX|NOBREAK))
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static int const x[] =
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{
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/*==================================================*/
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/* Name HID code Make Break*/
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/*==================================================*/
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/* No Event 00 */ -1, /* None */
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/* Overrun Error 01 */ NOBREAK|0xFF, /* None */
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/* POST Fail 02 */ NOBREAK|0xFC, /* None */
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/* ErrorUndefined 03 */ -1, /* Unassigned */
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/* a A 04 */ 0x1E, /* 9E */
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/* b B 05 */ 0x30, /* B0 */
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/* c C 06 */ 0x2E, /* AE */
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/* d D 07 */ 0x20, /* A0 */
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/* e E 08 */ 0x12, /* 92 */
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/* f F 09 */ 0x21, /* A1 */
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/* g G 0A */ 0x22, /* A2 */
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/* h H 0B */ 0x23, /* A3 */
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/* i I 0C */ 0x17, /* 97 */
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/* j J 0D */ 0x24, /* A4 */
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/* k K 0E */ 0x25, /* A5 */
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/* l L 0F */ 0x26, /* A6 */
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/* m M 10 */ 0x32, /* B2 */
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/* n N 11 */ 0x31, /* B1 */
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/* o O 12 */ 0x18, /* 98 */
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/* p P 13 */ 0x19, /* 99 */
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/* q Q 14 */ 0x10, /* 90 */
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/* r R 15 */ 0x13, /* 93 */
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/* s S 16 */ 0x1F, /* 9F */
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/* t T 17 */ 0x14, /* 94 */
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/* u U 18 */ 0x16, /* 96 */
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/* v V 19 */ 0x2F, /* AF */
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/* w W 1A */ 0x11, /* 91 */
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/* x X 1B */ 0x2D, /* AD */
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/* y Y 1C */ 0x15, /* 95 */
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/* z Z 1D */ 0x2C, /* AC */
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/* 1 ! 1E */ 0x02, /* 82 */
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/* 2 @ 1F */ 0x03, /* 83 */
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/* 3 # 20 */ 0x04, /* 84 */
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/* 4 $ 21 */ 0x05, /* 85 */
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/* 5 % 22 */ 0x06, /* 86 */
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/* 6 ^ 23 */ 0x07, /* 87 */
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/* 7 & 24 */ 0x08, /* 88 */
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/* 8 * 25 */ 0x09, /* 89 */
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/* 9 ( 26 */ 0x0A, /* 8A */
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/* 0 ) 27 */ 0x0B, /* 8B */
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/* Return 28 */ 0x1C, /* 9C */
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/* Escape 29 */ 0x01, /* 81 */
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/* Backspace 2A */ 0x0E, /* 8E */
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/* Tab 2B */ 0x0F, /* 8F */
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/* Space 2C */ 0x39, /* B9 */
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/* - _ 2D */ 0x0C, /* 8C */
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/* = + 2E */ 0x0D, /* 8D */
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/* [ { 2F */ 0x1A, /* 9A */
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/* ] } 30 */ 0x1B, /* 9B */
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/* \ | 31 */ 0x2B, /* AB */
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/* Europe 1 32 */ 0x2B, /* AB */
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/* ; : 33 */ 0x27, /* A7 */
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/* " ' 34 */ 0x28, /* A8 */
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/* ` ~ 35 */ 0x29, /* A9 */
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/* comma < 36 */ 0x33, /* B3 */
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/* . > 37 */ 0x34, /* B4 */
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/* / ? 38 */ 0x35, /* B5 */
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/* Caps Lock 39 */ 0x3A, /* BA */
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/* F1 3A */ 0x3B, /* BB */
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/* F2 3B */ 0x3C, /* BC */
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/* F3 3C */ 0x3D, /* BD */
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/* F4 3D */ 0x3E, /* BE */
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/* F5 3E */ 0x3F, /* BF */
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/* F6 3F */ 0x40, /* C0 */
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/* F7 40 */ 0x41, /* C1 */
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/* F8 41 */ 0x42, /* C2 */
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/* F9 42 */ 0x43, /* C3 */
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/* F10 43 */ 0x44, /* C4 */
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/* F11 44 */ 0x57, /* D7 */
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/* F12 45 */ 0x58, /* D8 */
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/* Print Screen 46 */ E0PREFIX|37, /* E0 B7 */
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/* Scroll Lock 47 */ 0x46, /* C6 */
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#if 0
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/* Break (Ctrl-Pause) 48 */ E0 46 E0 C6, /* None */
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/* Pause 48 */ E1 1D 45 E1 9D C5, /* None */
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#else
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/* Break (Ctrl-Pause)/Pause 48 */ NOBREAK /* Special case */, /* None */
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#endif
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/* Insert 49 */ E0PREFIX|0x52, /* E0 D2 */
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/* Home 4A */ E0PREFIX|0x47, /* E0 C7 */
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/* Page Up 4B */ E0PREFIX|0x49, /* E0 C9 */
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/* Delete 4C */ E0PREFIX|0x53, /* E0 D3 */
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/* End 4D */ E0PREFIX|0x4F, /* E0 CF */
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/* Page Down 4E */ E0PREFIX|0x51, /* E0 D1 */
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/* Right Arrow 4F */ E0PREFIX|0x4D, /* E0 CD */
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/* Left Arrow 50 */ E0PREFIX|0x4B, /* E0 CB */
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/* Down Arrow 51 */ E0PREFIX|0x50, /* E0 D0 */
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/* Up Arrow 52 */ E0PREFIX|0x48, /* E0 C8 */
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/* Num Lock 53 */ 0x45, /* C5 */
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/* Keypad / 54 */ E0PREFIX|0x35, /* E0 B5 */
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/* Keypad * 55 */ 0x37, /* B7 */
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/* Keypad - 56 */ 0x4A, /* CA */
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/* Keypad + 57 */ 0x4E, /* CE */
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/* Keypad Enter 58 */ E0PREFIX|0x1C, /* E0 9C */
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/* Keypad 1 End 59 */ 0x4F, /* CF */
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/* Keypad 2 Down 5A */ 0x50, /* D0 */
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/* Keypad 3 PageDn 5B */ 0x51, /* D1 */
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/* Keypad 4 Left 5C */ 0x4B, /* CB */
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/* Keypad 5 5D */ 0x4C, /* CC */
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/* Keypad 6 Right 5E */ 0x4D, /* CD */
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/* Keypad 7 Home 5F */ 0x47, /* C7 */
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/* Keypad 8 Up 60 */ 0x48, /* C8 */
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/* Keypad 9 PageUp 61 */ 0x49, /* C9 */
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/* Keypad 0 Insert 62 */ 0x52, /* D2 */
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/* Keypad . Delete 63 */ 0x53, /* D3 */
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/* Europe 2 64 */ 0x56, /* D6 */
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/* App 65 */ E0PREFIX|0x5D, /* E0 DD */
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/* Keyboard Power 66 */ E0PREFIX|0x5E, /* E0 DE */
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/* Keypad = 67 */ 0x59, /* D9 */
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/* F13 68 */ 0x64, /* E4 */
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/* F14 69 */ 0x65, /* E5 */
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/* F15 6A */ 0x66, /* E6 */
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/* F16 6B */ 0x67, /* E7 */
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/* F17 6C */ 0x68, /* E8 */
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/* F18 6D */ 0x69, /* E9 */
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/* F19 6E */ 0x6A, /* EA */
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/* F20 6F */ 0x6B, /* EB */
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/* F21 70 */ 0x6C, /* EC */
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/* F22 71 */ 0x6D, /* ED */
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/* F23 72 */ 0x6E, /* EE */
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/* F24 73 */ 0x76, /* F6 */
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/* Keyboard Execute 74 */ -1, /* Unassigned */
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/* Keyboard Help 75 */ -1, /* Unassigned */
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/* Keyboard Menu 76 */ -1, /* Unassigned */
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/* Keyboard Select 77 */ -1, /* Unassigned */
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/* Keyboard Stop 78 */ -1, /* Unassigned */
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/* Keyboard Again 79 */ -1, /* Unassigned */
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/* Keyboard Undo 7A */ -1, /* Unassigned */
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/* Keyboard Cut 7B */ -1, /* Unassigned */
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/* Keyboard Copy 7C */ -1, /* Unassigned */
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/* Keyboard Paste 7D */ -1, /* Unassigned */
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/* Keyboard Find 7E */ -1, /* Unassigned */
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/* Keyboard Mute 7F */ -1, /* Unassigned */
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/* Keyboard Volume Up 80 */ -1, /* Unassigned */
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/* Keyboard Volume Dn 81 */ -1, /* Unassigned */
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/* Keyboard Locking Caps Lock 82 */ -1, /* Unassigned */
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/* Keyboard Locking Num Lock 83 */ -1, /* Unassigned */
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/* Keyboard Locking Scroll Lock 84 */ -1, /* Unassigned */
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/* Keypad comma 85 */ 0x7E, /* FE */
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/* Keyboard Equal Sign 86 */ -1, /* Unassigned */
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/* Keyboard Int'l 1 87 */ 0x73, /* F3 */
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/* Keyboard Int'l 2 88 */ 0x70, /* F0 */
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/* Keyboard Int'l 2 89 */ 0x7D, /* FD */
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/* Keyboard Int'l 4 8A */ 0x79, /* F9 */
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/* Keyboard Int'l 5 8B */ 0x7B, /* FB */
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/* Keyboard Int'l 6 8C */ 0x5C, /* DC */
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/* Keyboard Int'l 7 8D */ -1, /* Unassigned */
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/* Keyboard Int'l 8 8E */ -1, /* Unassigned */
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/* Keyboard Int'l 9 8F */ -1, /* Unassigned */
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/* Keyboard Lang 1 90 */ NOBREAK|0xF2, /* None */
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/* Keyboard Lang 2 91 */ NOBREAK|0xF1, /* None */
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/* Keyboard Lang 3 92 */ 0x78, /* F8 */
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/* Keyboard Lang 4 93 */ 0x77, /* F7 */
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/* Keyboard Lang 5 94 */ 0x76, /* F6 */
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/* Keyboard Lang 6 95 */ -1, /* Unassigned */
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/* Keyboard Lang 7 96 */ -1, /* Unassigned */
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/* Keyboard Lang 8 97 */ -1, /* Unassigned */
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/* Keyboard Lang 9 98 */ -1, /* Unassigned */
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/* Keyboard Alternate Erase 99 */ -1, /* Unassigned */
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/* Keyboard SysReq/Attention 9A */ -1, /* Unassigned */
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/* Keyboard Cancel 9B */ -1, /* Unassigned */
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/* Keyboard Clear 9C */ -1, /* Unassigned */
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/* Keyboard Prior 9D */ -1, /* Unassigned */
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/* Keyboard Return 9E */ -1, /* Unassigned */
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/* Keyboard Separator 9F */ -1, /* Unassigned */
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/* Keyboard Out A0 */ -1, /* Unassigned */
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/* Keyboard Oper A1 */ -1, /* Unassigned */
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/* Keyboard Clear/Again A2 */ -1, /* Unassigned */
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/* Keyboard CrSel/Props A3 */ -1, /* Unassigned */
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/* Keyboard ExSel A4 */ -1, /* Unassigned */
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/* Reserved A5 */ -1, /* Reserved */
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/* Reserved A6 */ -1, /* Reserved */
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/* Reserved A7 */ -1, /* Reserved */
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/* Reserved A8 */ -1, /* Reserved */
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/* Reserved A9 */ -1, /* Reserved */
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/* Reserved AA */ -1, /* Reserved */
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/* Reserved AB */ -1, /* Reserved */
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/* Reserved AC */ -1, /* Reserved */
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/* Reserved AD */ -1, /* Reserved */
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/* Reserved AE */ -1, /* Reserved */
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/* Reserved AF */ -1, /* Reserved */
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/* Reserved B0 */ -1, /* Reserved */
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/* Reserved B1 */ -1, /* Reserved */
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/* Reserved B2 */ -1, /* Reserved */
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/* Reserved B3 */ -1, /* Reserved */
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/* Reserved B4 */ -1, /* Reserved */
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/* Reserved B5 */ -1, /* Reserved */
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/* Reserved B6 */ -1, /* Reserved */
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/* Reserved B7 */ -1, /* Reserved */
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/* Reserved B8 */ -1, /* Reserved */
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/* Reserved B9 */ -1, /* Reserved */
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/* Reserved BA */ -1, /* Reserved */
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/* Reserved BB */ -1, /* Reserved */
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/* Reserved BC */ -1, /* Reserved */
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/* Reserved BD */ -1, /* Reserved */
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/* Reserved BE */ -1, /* Reserved */
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/* Reserved BF */ -1, /* Reserved */
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/* Reserved C0 */ -1, /* Reserved */
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/* Reserved C1 */ -1, /* Reserved */
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/* Reserved C2 */ -1, /* Reserved */
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/* Reserved C3 */ -1, /* Reserved */
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/* Reserved C4 */ -1, /* Reserved */
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/* Reserved C5 */ -1, /* Reserved */
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/* Reserved C6 */ -1, /* Reserved */
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/* Reserved C8 */ -1, /* Reserved */
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/* Reserved C9 */ -1, /* Reserved */
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/* Reserved CA */ -1, /* Reserved */
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/* Reserved CB */ -1, /* Reserved */
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/* Reserved CC */ -1, /* Reserved */
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/* Reserved CD */ -1, /* Reserved */
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/* Reserved CE */ -1, /* Reserved */
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/* Reserved CF */ -1, /* Reserved */
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/* Reserved D0 */ -1, /* Reserved */
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/* Reserved D1 */ -1, /* Reserved */
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/* Reserved D2 */ -1, /* Reserved */
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/* Reserved D3 */ -1, /* Reserved */
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/* Reserved D4 */ -1, /* Reserved */
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/* Reserved D5 */ -1, /* Reserved */
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/* Reserved D6 */ -1, /* Reserved */
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/* Reserved D8 */ -1, /* Reserved */
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/* Reserved D9 */ -1, /* Reserved */
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/* Reserved DA */ -1, /* Reserved */
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/* Reserved DB */ -1, /* Reserved */
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/* Reserved DC */ -1, /* Reserved */
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/* Reserved DD */ -1, /* Reserved */
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/* Reserved DE */ -1, /* Reserved */
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/* Reserved DF */ -1, /* Reserved */
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/* Left Control E0 */ 0x1D, /* 9D */
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/* Left Control E0 */ 0x1D, /* 9D */
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/* Left Shift E1 */ 0x2A, /* AA */
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/* Left Alt E2 */ 0x38, /* B8 */
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/* Left GUI E3 */ E0PREFIX|0x5B, /* E0 DB */
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/* Right Control E4 */ E0PREFIX|0x1D, /* E0 9D */
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/* Right Shift E5 */ 0x36, /* B6 */
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/* Right Alt E6 */ E0PREFIX|0x38, /* E0 B8 */
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/* Right GUI E7 */ E0PREFIX|0x5C /* E0 DC */
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};
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#define xsize (sizeof(x)/sizeof(x[0]))
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/*
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* Get a max HID keycode (aligned)
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*/
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int
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kbd_maxkey(void)
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{
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return (xsize);
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}
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/*
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* Process keys
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*/
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int
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kbd_process_keys(bthid_session_p s)
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{
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bitstr_t r[bitstr_size(xsize)];
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int f0, f1, i;
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assert(s != NULL);
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assert(s->srv != NULL);
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bit_ffs(s->srv->keys, xsize, &f0);
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bit_ffs(s->keys, xsize, &f1);
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if (f0 == -1) {
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/* all keys are released, no keys pressed */
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if (f1 != -1) {
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kbd_write(s->keys, f1, 0, s->srv->vkbd);
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memset(s->keys, 0, bitstr_size(xsize));
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}
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return (0);
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}
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if (f1 == -1) {
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/* some keys got pressed, no keys released */
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if (f0 != -1) {
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memcpy(s->keys, s->srv->keys, bitstr_size(xsize));
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kbd_write(s->keys, f0, 1, s->srv->vkbd);
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memset(s->srv->keys, 0, bitstr_size(xsize));
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}
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return (0);
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}
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/* some keys got pressed, some keys got released */
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memset(r, 0, bitstr_size(xsize));
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for (i = f1; i < xsize; i++) {
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if (bit_test(s->keys, i)) {
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if (!bit_test(s->srv->keys, i)) {
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bit_clear(s->keys, i);
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bit_set(r, i);
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} else
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bit_clear(s->srv->keys, i);
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}
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}
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for (i = f0; i < xsize; i++) {
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if (bit_test(s->srv->keys, i)) {
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if (!bit_test(s->keys, i))
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bit_set(s->keys, i);
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else
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bit_clear(s->srv->keys, i);
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}
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}
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bit_ffs(r, xsize, &f0);
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bit_ffs(s->srv->keys, xsize, &f1);
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if (f0 > 0)
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kbd_write(r, f0, 0, s->srv->vkbd);
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if (f1 > 0) {
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kbd_write(s->srv->keys, f1, 1, s->srv->vkbd);
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memset(s->srv->keys, 0, bitstr_size(xsize));
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}
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return (0);
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}
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/*
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* Get current keyboard index (fd version)
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*/
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int
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kbd_get_index_fd(int fd)
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{
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keyboard_info_t info;
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return ((ioctl(fd, KDGKBINFO, &info) < 0)? -1 : info.kb_index);
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}
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/*
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* Get current keyboard index (device node version)
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*/
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int
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kbd_get_index(char const *device)
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{
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int fd, index;
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fd = open(device, O_RDONLY);
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if (fd < 0)
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return (-1);
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index = kbd_get_index_fd(fd);
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close(fd);
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return (index);
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}
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/*
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* Switch keyboards. Execute external script to switch keyboards. The keyboard
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* index will be passed to the script in the first argument (argv[1]). We use
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* external script here to allow user to customize his/her wireless keyboard,
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* i.e. set mapping etc. In theory, all parameters could be picked up from the
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* rc.conf.
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*/
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int
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kbd_switch(char const *script, int index)
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{
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pid_t pid;
|
|
int status;
|
|
|
|
if (script == NULL) {
|
|
syslog(LOG_NOTICE, "Could not switch keyboards. " \
|
|
"Switch script is not defined");
|
|
return (-1);
|
|
}
|
|
|
|
if (access(script, X_OK) < 0) {
|
|
syslog(LOG_ERR, "The %s is not executable. %s (%d)",
|
|
script, strerror(errno), errno);
|
|
return (-1);
|
|
}
|
|
|
|
pid = fork();
|
|
|
|
if (pid == (pid_t) -1) {
|
|
syslog(LOG_ERR, "Could not create process for %s. %s (%d)",
|
|
script, strerror(errno), errno);
|
|
return (-1);
|
|
}
|
|
|
|
if (pid == 0) {
|
|
char arg[16];
|
|
char *argv[3] = { (char *) script, arg, NULL };
|
|
|
|
snprintf(arg, sizeof(arg), "%d", index);
|
|
execv(script, argv);
|
|
|
|
syslog(LOG_ERR, "Could not execute '%s %d'. %s (%d)",
|
|
script, index, strerror(errno), errno);
|
|
|
|
exit(1);
|
|
}
|
|
|
|
if (waitpid(pid, &status, 0) < 0) {
|
|
syslog(LOG_ERR, "Could not waitpid for %s. %s (%d)",
|
|
script, strerror(errno), errno);
|
|
return (-1);
|
|
}
|
|
|
|
if (WIFEXITED(status) && WEXITSTATUS(status)) {
|
|
syslog(LOG_ERR, "External command '%s %d' failed, exit code %d",
|
|
script, index, WEXITSTATUS(status));
|
|
return (-1);
|
|
}
|
|
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Translate given keymap and write keyscodes
|
|
*/
|
|
|
|
static void
|
|
kbd_write(bitstr_t *m, int fb, int make, int fd)
|
|
{
|
|
int i, *b, *eob, n, buf[64];
|
|
|
|
b = buf;
|
|
eob = b + sizeof(buf)/sizeof(buf[0]);
|
|
i = fb;
|
|
|
|
while (i < xsize) {
|
|
if (bit_test(m, i)) {
|
|
n = kbd_xlate(i, make, b, eob);
|
|
if (n == -1) {
|
|
write(fd, buf, (b - buf) * sizeof(buf[0]));
|
|
b = buf;
|
|
continue;
|
|
}
|
|
|
|
b += n;
|
|
}
|
|
|
|
i ++;
|
|
}
|
|
|
|
if (b != buf)
|
|
write(fd, buf, (b - buf) * sizeof(buf[0]));
|
|
}
|
|
|
|
|
|
/*
|
|
* Translate HID code into PS/2 code and put codes into buffer b.
|
|
* Returns the number of codes put in b. Return -1 if buffer has not
|
|
* enough space.
|
|
*/
|
|
|
|
#undef PUT
|
|
#define PUT(c, n, b, eob) \
|
|
do { \
|
|
if ((b) >= (eob)) \
|
|
return (-1); \
|
|
*(b) = (c); \
|
|
(b) ++; \
|
|
(n) ++; \
|
|
} while (0)
|
|
|
|
static int
|
|
kbd_xlate(int code, int make, int *b, int const *eob)
|
|
{
|
|
int c, n;
|
|
|
|
n = 0;
|
|
|
|
if (code >= xsize)
|
|
return (0); /* HID code is not in the table */
|
|
|
|
/* Handle special case - Pause/Break */
|
|
if (code == 0x48) {
|
|
if (!make)
|
|
return (0); /* No break code */
|
|
|
|
#if 0
|
|
XXX FIXME
|
|
if (ctrl_is_pressed) {
|
|
/* Break (Ctrl-Pause) */
|
|
PUT(0xe0, n, b, eob);
|
|
PUT(0x46, n, b, eob);
|
|
PUT(0xe0, n, b, eob);
|
|
PUT(0xc6, n, b, eob);
|
|
} else {
|
|
/* Pause */
|
|
PUT(0xe1, n, b, eob);
|
|
PUT(0x1d, n, b, eob);
|
|
PUT(0x45, n, b, eob);
|
|
PUT(0xe1, n, b, eob);
|
|
PUT(0x9d, n, b, eob);
|
|
PUT(0xc5, n, b, eob);
|
|
}
|
|
#endif
|
|
|
|
return (n);
|
|
}
|
|
|
|
if ((c = x[code]) == -1)
|
|
return (0); /* HID code translation is not defined */
|
|
|
|
if (make) {
|
|
if (c & E0PREFIX)
|
|
PUT(0xe0, n, b, eob);
|
|
|
|
PUT((c & CODEMASK), n, b, eob);
|
|
} else if (!(c & NOBREAK)) {
|
|
if (c & E0PREFIX)
|
|
PUT(0xe0, n, b, eob);
|
|
|
|
PUT((0x80|(c & CODEMASK)), n, b, eob);
|
|
}
|
|
|
|
return (n);
|
|
}
|
|
|