153 lines
3.9 KiB
C#
153 lines
3.9 KiB
C#
using System;
|
|
using System.Text;
|
|
|
|
namespace DbMaker
|
|
{
|
|
|
|
|
|
/**
|
|
* util class
|
|
*
|
|
* @author chenxin<chenxin619315@gmail.com>
|
|
*/
|
|
public class Util
|
|
{
|
|
/**
|
|
* write specfield bytes to a byte array start from offset
|
|
*
|
|
* @param b
|
|
* @param offset
|
|
* @param v
|
|
* @param bytes
|
|
*/
|
|
public static void write(byte[] b, int offset, long v, int bytes)
|
|
{
|
|
for (int i = 0; i < bytes; i++)
|
|
{
|
|
//b[offset++] = (byte)((v >>> (8 * i)) & 0xFF);
|
|
b[offset++] = (byte) ((v >> (8 * i)) & 0xFF);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* write a int to a byte array
|
|
*
|
|
* @param b
|
|
* @param offet
|
|
* @param v
|
|
*/
|
|
public static void writeIntLong(byte[] b, int offset, long v)
|
|
{
|
|
b[offset++] = (byte) ((v >> 0) & 0xFF);
|
|
b[offset++] = (byte) ((v >> 8) & 0xFF);
|
|
b[offset++] = (byte) ((v >> 16) & 0xFF);
|
|
b[offset] = (byte) ((v >> 24) & 0xFF);
|
|
}
|
|
|
|
/**
|
|
* get a int from a byte array start from the specifiled offset
|
|
*
|
|
* @param b
|
|
* @param offset
|
|
*/
|
|
public static long getIntLong(byte[] b, int offset)
|
|
{
|
|
return (
|
|
((b[offset++] & 0x000000FFL)) |
|
|
((b[offset++] << 8) & 0x0000FF00L) |
|
|
((b[offset++] << 16) & 0x00FF0000L) |
|
|
((b[offset] << 24) & 0xFF000000L)
|
|
);
|
|
}
|
|
|
|
/**
|
|
* get a int from a byte array start from the specifield offset
|
|
*
|
|
* @param b
|
|
* @param offset
|
|
*/
|
|
public static int getInt3(byte[] b, int offset)
|
|
{
|
|
return (
|
|
(b[offset++] & 0x000000FF) |
|
|
(b[offset++] & 0x0000FF00) |
|
|
(b[offset] & 0x00FF0000)
|
|
);
|
|
}
|
|
|
|
public static int getInt2(byte[] b, int offset)
|
|
{
|
|
return (
|
|
(b[offset++] & 0x000000FF) |
|
|
(b[offset] & 0x0000FF00)
|
|
);
|
|
}
|
|
|
|
public static int getInt1(byte[] b, int offset)
|
|
{
|
|
return (
|
|
(b[offset] & 0x000000FF)
|
|
);
|
|
}
|
|
|
|
/**
|
|
* string ip to long ip
|
|
*
|
|
* @param ip
|
|
* @return long
|
|
*/
|
|
public static long ip2long(String ip)
|
|
{
|
|
ip = ip.Trim();
|
|
String[] ips = ip.Split('.');
|
|
long ip1 = Int64.Parse(ips[0]);
|
|
long ip2 = Int64.Parse(ips[1]);
|
|
long ip3 = Int64.Parse(ips[2]);
|
|
long ip4 = Int64.Parse(ips[3]);
|
|
long ip2long = 1L * ip1 * 256 * 256 * 256 + ip2 * 256 * 256 + ip3 * 256 + ip4;
|
|
return ip2long;
|
|
}
|
|
|
|
/**
|
|
* int to ip string
|
|
*
|
|
* @param ip
|
|
* @return string
|
|
*/
|
|
public static String long2ip(long ip)
|
|
{
|
|
StringBuilder sb = new StringBuilder();
|
|
|
|
sb
|
|
.Append((ip >> 24) & 0xFF).Append('.')
|
|
.Append((ip >> 16) & 0xFF).Append('.')
|
|
.Append((ip >> 8) & 0xFF).Append('.')
|
|
.Append((ip >> 0) & 0xFF);
|
|
|
|
return sb.ToString();
|
|
}
|
|
|
|
/**
|
|
* check the validate of the specifeld ip address
|
|
*
|
|
* @param ip
|
|
* @return boolean
|
|
*/
|
|
public static Boolean isIpAddress(String ip)
|
|
{
|
|
String[] p = ip.Split("\\.");
|
|
if (p.Length != 4) return false;
|
|
|
|
//for ( String pp : p ) {
|
|
//for ( String pp : p ) {
|
|
foreach (var pp in p)
|
|
{
|
|
if (pp.Length > 3) return false;
|
|
int val = Int32.Parse(pp); //Integer.valueOf(pp);
|
|
if (val > 255) return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
}
|
|
} |