amxmodx/plugins/BinLogReader/PluginDb.cs

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C#
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using System;
using System.Collections;
using System.IO;
using System.Text;
namespace BinLogReader
{
/// <summary>
/// Aggregates plugin information
/// </summary>
public class PluginDb
{
private static uint BINDB_MAGIC = 0x414D4244;
private static short BINDB_VERSION = 0x0100;
private ArrayList PluginList;
public int Count
{
get
{
return PluginList.Count;
}
}
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public PluginDb(uint plugins)
{
PluginList = new ArrayList((int)plugins);
}
public Plugin GetPluginById(ushort id)
{
return GetPluginById((int)id);
}
public Plugin GetPluginById(int id)
{
if (id < 0 || id >= PluginList.Count)
return null;
return (Plugin)PluginList[id];
}
public static PluginDb FromFile(string filename)
{
if (!File.Exists(filename))
return null;
System.IO.FileStream stream = File.Open(filename, System.IO.FileMode.Open);
if (stream == null)
return null;
BinaryReader br = new BinaryReader(stream);
if (br == null)
return null;
PluginDb db;
try
{
//check header
uint magic = br.ReadUInt32();
if (magic != BINDB_MAGIC)
throw new Exception("Invalid magic DB number");
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//check version
ushort vers = br.ReadUInt16();
if (vers > BINDB_VERSION)
throw new Exception("Unknown DB version");
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//read plugins
uint plugins = br.ReadUInt32();
db = new PluginDb(plugins);
for (uint i=0; i<plugins; i++)
{
byte status = br.ReadByte();
byte length = br.ReadByte();
byte [] name = br.ReadBytes(length + 1);
uint natives = br.ReadUInt32();
uint publics = br.ReadUInt32();
int id = db.CreatePlugin(
Encoding.ASCII.GetString(name, 0, length),
(int)natives,
(int)publics,
status,
(int)i);
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Plugin pl = db.GetPluginById(id);
for (uint j=0; j<natives; j++)
{
length = br.ReadByte();
name = br.ReadBytes(length + 1);
pl.AddNative(Encoding.ASCII.GetString(name, 0, length));
}
for (uint j=0; j<publics; j++)
{
length = br.ReadByte();
name = br.ReadBytes(length + 1);
pl.AddPublic(Encoding.ASCII.GetString(name, 0, length));
}
}
}
catch
{
db = null;
throw new Exception("DB file is corrupt");
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}
finally
{
br.Close();
stream.Close();
GC.Collect();
}
return db;
}
private int CreatePlugin(string file, int natives, int publics, byte status, int index)
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{
Plugin pl = new Plugin(file, natives, publics, status, index);
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PluginList.Add(pl);
return PluginList.Count - 1;
}
}
}