/// <summary>
/// Get numeric value
/// </summary>
/// <param name="sourse"></param>
/// <returns></returns>
private long GetNumericValue(string p)
{
long n = -1;
try
{
string ost = "";
string ist = GetStringValue(p);
for (int i = 0; i < ist.Length; i++)
{
int res = 0;
string sym = ist.Substring(i, 1);
if (int.TryParse(sym, out res))
{
ost += sym;
}
else
{
break;
}
}
n = VSLib.ConvertStringToLong(ost);
}
catch (Exception e1)
{
this.Error = e1.Message;
return(-1);
}
return(n);
}
/// <summary>
/// Save catalog content
/// </summary>
public void Save()
{
string ost = sg_ok + DEFS.VSTORAGE_VERSION + "$" + ste + "$" + DEFS.DELIM_NEWLINE;
for (int i = 0; i < dl.Count; i++)
{
ost += "[" + dl[i].Name + "]" + DEFS.DELIM_NEWLINE;
ost += DEF_ID + "=" + dl[i].Id.ToString() + DEFS.DELIM_NEWLINE;
ost += DEF_PAGESIZE + "=" + dl[i].page_size_kb.ToString() + "Kb" + DEFS.DELIM_NEWLINE;
ost += DEF_SIZE + "=" + dl[i].space_size_pg.ToString() + "Pages" + DEFS.DELIM_NEWLINE;
ost += DEF_EXTENSION + "=" + dl[i].extension_pg.ToString() + "Pages" + DEFS.DELIM_NEWLINE;
ost += DEF_PARTITIONS + "=" + dl[i].partitions.ToString() + DEFS.DELIM_NEWLINE;
ost += DEF_TIMESTAMP + "=" + dl[i].creation_timestamp + DEFS.DELIM_NEWLINE;
ost += DEF_PATH + "=" + dl[i].path + DEFS.DELIM_NEWLINE;
ost += DEF_INDEXSPACE + "=" + dl[i].indexspace + DEFS.DELIM_NEWLINE;
// Create signature
ost += DEF_SIGNATURE + "=" + dl[i].CalculateSignature() + DEFS.DELIM_NEWLINE;
}
if (File.Exists(catalog_file_name))
{
if (File.Exists(backup_file_name))
{
File.Delete(backup_file_name);
}
File.Move(catalog_file_name, backup_file_name);
}
File.WriteAllBytes(catalog_file_name, VSLib.ConvertStringToByte(ost));
}
/// <summary>
/// Delete key
/// </summary>
/// <param name="key"></param>
/// <returns></returns>
private bool delete(byte[] key, long value = -1)
{
//VSDebug.StopPoint(Name, "SIZE");
int nodeID = ROOT;
while (nodeID >= 0)
{
int compare = VSLib.CompareKeys(key, BTree[nodeID].Key);
if (compare < 0)
{
nodeID = BTree[nodeID].Left;
}
else if (compare > 0)
{
nodeID = BTree[nodeID].Right;
}
else
{
return(delete_avl_node(nodeID, value));
}
}
return(false);
}
/// <summary>
/// Set multiple string values
/// </summary>
/// <param name="fields">
/// Array of fieldsin format: {name}={value}
/// </param>
/// <returns></returns>
public void Set(string[] fields)
{
bool upd = false;
if (fields != null)
{
if (fields.Length > 0)
{
for (int i = 0; i < fields.Length; i++)
{
int j = fields[i].IndexOf("=");
if (j >= 0)
{
string name = fields[i].Substring(0, j);
string value = "";
if (j < (fields[i].Length - 1))
{
value = fields[i].Substring(j + 1, fields[i].Length - j - 1);
}
set_field(name, FIELD_TYPE_STRING, VSLib.ConvertStringToByte(value), false);
upd = true;
}
}
}
}
if (upd)
{
serialize();
}
}
/// <summary>
/// Delete existing index
/// </summary>
/// <param name="name"></param>
/// <returns></returns>
public void DeleteIndex(string name)
{
if (IndexSpace != null)
{
IndexSpace.DeleteIndex(DEFS.PrepareFullIndexName(this.Name, name));
}
else
{
VSIndex x = this.get_index(name);
if (x == null)
{
throw new VSException(DEFS.E0052_DELETE_INDEX_ERROR_CODE, "- index is not found - '" + name + "'");
}
// Remove all references
VSIndex ref_x = get_index(DEFS.PrepareFullIndexName(DEFS.ParseIndexSpace(name), DEFS.INDEX_CROSS_REFERENCES));
x.Reset();
while (x.Next())
{
long[] refs = x.CurrentRefs;
for (int i = 0; i < refs.Length; i++)
{
byte[] key = VSLib.ConvertLongToByte(refs[i]);
ref_x.delete_node(key, x.CurrentAvlNode.ID);
}
}
index_list.Remove(x);
index_list_full.Remove(x);
x.purge();
}
}
/// <summary>
/// Gey index names by space prefix
/// </summary>
/// <param name="space_name"></param>
/// <returns></returns>
private string[] get_indexes_for_space(string space_name)
{
List <string> lx = new List <string>();
string nm = space_name.Trim().ToLower();
for (int i = 0; i < index_list.Count; i++)
{
string[] parsed_name = new string[2];
parsed_name[0] = DEFS.ParseIndexSpace(index_list[i].Name);
parsed_name[1] = DEFS.ParseIndexName(index_list[i].Name);
if (nm == "")
{
if (parsed_name[0] == "")
{
lx.Add(parsed_name[1]);
}
}
else
{
if (VSLib.Compare(nm, parsed_name[0]))
{
lx.Add(parsed_name[1]);
}
}
}
return(lx.ToArray());
}
// Reader/Writer with encryption
/// <summary>
/// File Stream
/// </summary>
/// <param name="filename">File name for Read/Write</param>
/// <param name="mode">'c' - create; 'o' - open, 'a' - append</param>
/// <param name="key">key for encrypt/decrypt ("" - no encryption)</param>
public VSIO(string filename, string mode, string key)
{
string md = mode.Trim().ToLower();
//fs = stream;
xkey_b = VSLib.ConvertStringToByte(key);
_encrypt = (key != "");
IMO = false;
if (md == FILE_MODE_CREATE)
{
fs = new FileStream(filename, FileMode.Create);
}
else if (md == FILE_MODE_APPEND)
{
fs = new FileStream(filename, FileMode.Append);
}
else if (md == FILE_MODE_OPEN)
{
fs = new FileStream(filename, FileMode.OpenOrCreate);
}
else
{
throw new VSException(DEFS.E0034_IO_ERROR_CODE, "Invalid open mode = '" + md + "'");
}
}
/// <summary>
/// Find key (string)
/// </summary>
/// <param name="key"></param>
/// <param name="op">0 - equal; -1 - nearest left (less than); 1 - nearest right (more than) </param>
/// <returns>Value</returns>
public BTResult Find(string key, int op)
{
int i = find(VSLib.ConvertStringToByte(key), op);
BTResult ret = new BTResult();
ret.KeyString = (i < 0) ? "" : VSLib.ConvertByteToString(BTree[i].Key);
ret.Value = (i < 0) ? -1 : BTree[i].Value[0];
return(ret);
}
/// <summary>
/// Find key (long)
/// </summary>
/// <param name="key"></param>
/// <param name="op">0 - equal; -1 - nearest left (less than); 1 - nearest right (more than) </param>
/// <returns>Value</returns>
public BTResult Find(long key, int op)
{
int i = find(VSLib.ConvertLongToByteReverse(key), op);
BTResult ret = new BTResult();
ret.Key = (i < 0) ? -1 : VSLib.ConvertByteToLongReverse(BTree[i].Key);
ret.Value = (i < 0) ? -1 : BTree[i].Value[0];
return(ret);
}
/// <summary>
/// Find all keys (non-unique), string
/// </summary>
/// <param name="key"></param>
/// <param name="op">0 - equal; -1 - nearest left (less than); 1 - nearest right (more than) </param>
/// <returns></returns>
public BTResultList FindAll(string key, int op)
{
int i = find(VSLib.ConvertStringToByte(key), op);
BTResultList ret = new BTResultList();
ret.KeyString = (i < 0) ? "" : VSLib.ConvertByteToString(BTree[i].Key);
ret.Value = (i < 0) ? new long[0] : BTree[i].Value.ToArray();
return(ret);
}
/// <summary>
/// Find all keys (non-unique), long
/// </summary>
/// <param name="key"></param>
/// <param name="op">0 - equal; -1 - nearest left (less than); 1 - nearest right (more than) </param>
/// <returns></returns>
public BTResultList FindAll(long key, int op)
{
int i = find(VSLib.ConvertLongToByteReverse(key), op);
BTResultList ret = new BTResultList();
ret.Key = (i < 0) ? -1 : VSLib.ConvertByteToLongReverse(BTree[i].Key);
ret.Value = (i < 0) ? new long[0] : BTree[i].Value.ToArray();
return(ret);
}
/// <summary>
/// Write FBQE
/// </summary>
/// <param name="f"></param>
private void SerializeFBQE(FBQE f)
{
VSLib.CopyBytes(buffer, VSLib.ConvertStringToByte(DEFS.FBQE_SIGNATURE), f.address + SG_POS, SG_LEN);
VSLib.CopyBytes(buffer, VSLib.ConvertLongToByte(f.ADDRESS_START), f.address + ADDRESS_START_POS, ADDRESS_START_LEN);
VSLib.CopyBytes(buffer, VSLib.ConvertLongToByte(f.ADDRESS_END), f.address + ADDRESS_END_POS, ADDRESS_END_LEN);
VSLib.CopyBytes(buffer, VSLib.ConvertLongToByte(f.LENGTH), f.address + LENGTH_POS, LENGTH_LEN);
VSLib.CopyBytes(buffer, VSLib.ConvertIntToByte(f.PREV), f.address + PREV_POS, PREV_LEN);
VSLib.CopyBytes(buffer, VSLib.ConvertIntToByte(f.NEXT), f.address + NEXT_POS, NEXT_LEN);
F_Object.Write(f.address, VSLib.GetByteArray(buffer, f.address, FBQE_LENGTH), FBQE_LENGTH);
}
/// <summary>
/// Delete reference
/// </summary>
/// <param name="rf"></param>
/// <returns></returns>
internal bool delete_ref(long rf)
{
int x = -1;
List <long> refs = REFS.ToList <long>();
int count = refs.Count;
for (int i = 0; i < count; i++)
{
int i2 = count - 1 - i;
if (i > i2)
{
break;
}
if (refs[i] == rf)
{
x = i;
}
else if (refs[i2] == rf)
{
x = i2;
}
if (x > 0)
{
break;
}
}
if (x < 0)
{
return(false);
}
else
{
refs.RemoveAt(x);
}
byte[] refs_new = new byte[refs.Count * 8];
for (int i = 0; i < refs.Count; i++)
{
VSLib.CopyBytes(refs_new, VSLib.ConvertLongToByte(refs[i]), (i * 8), 8);
}
ALLOCATION.Write(this.REF_POS, refs_new, refs_new.Length); // Write
REF_COUNT = refs.Count;
return(true);
}
/// <summary>
/// Lock current directory(all spaces)
/// </summary>
/// <returns></returns>
private bool Lock()
{
if (IMO)
{
return(true);
}
byte[] shared_code = { 0x0F, 0, 0, 0, 0, 0, 0, 0 };
byte[] exclusive_code = { 0xFF, 0, 0, 0, 0, 0, 0, 0 };
long exclusive_lock_offset = 0;
string lock_fn = root_path + "\\" + DEFS.LOCK_FILE_NAME;
if (fslck == null)
{
lock_number = -1;
if (!File.Exists(lock_fn))
{
byte[] b = new byte[8192];
fslck = File.Create(lock_fn);
fslck.Write(b, 0, b.Length);
fslck.Close();
fslck = null;
}
fslck = File.Open(lock_fn, FileMode.Open, FileAccess.ReadWrite, FileShare.ReadWrite);
long number = fslck.Length / lock_length;
try
{
fslck.Lock(exclusive_lock_offset, fslck.Length); // Lock for both read/write exclusively
lock_number = 0;
fslck.Seek(lock_number, SeekOrigin.Begin);
fslck.Write(exclusive_code, 0, exclusive_code.Length);
fslck.Write(VSLib.ConvertLongToByte(DateTime.Now.ToBinary()), 0, 8);
}
catch (IOException e)
{
this.Error = e.Message;
fslck.Close();
fslck = null;
}
return(lock_number >= 0);
}
else
{
return(true);
}
}
/// <summary>
/// Memory Stream
/// </summary>
/// <param name="data">byte array - existing stream (read-only); null or empty - new stream</param>
/// <param name="key">key for encrypt/decrypt ("" - no encryption)</param>
public VSIO(byte[] data, string key)
{
//fs = stream;
xkey_b = VSLib.ConvertStringToByte(key);
_encrypt = (key != "");
IMO = true;
if (data == null)
{
fs = new MemoryStream();
}
else
{
fs = new MemoryStream(data);
}
}
/// <summary>
/// Delete index (byte key)
/// </summary>
/// <param name="key"></param>
/// <param name="id">For non-unique index. 0 - delete a </param>
/// <returns></returns>
public bool Delete(byte[] key, long id)
{
if (this.index_name == DEFS.INDEX_CROSS_REFERENCES)
{
throw new VSException(DEFS.E0055_INDEX_INVALID_OP_CODE, " - 'Delete' for '" + DEFS.INDEX_CROSS_REFERENCES + "'");
}
long av_id = this.delete_node(key, id);
if (av_id > 0)
{
byte[] obj_key = VSLib.ConvertLongToByteReverse(id);
XRefs.delete_node(obj_key, av_id);
return(true);
}
return(false);
}
/// <summary>
/// Remove all related indexes for object by ID
/// ONLY for objects and indexes located in THIS space
/// </summary>
/// <param name="a"></param>
private void remove_all_indexes(string space_name, long id)
{
VSIndex ref_index = this.get_index(DEFS.PrepareFullIndexName(space_name, DEFS.INDEX_CROSS_REFERENCES));
if (ref_index != null)
{
byte[] key = VSLib.ConvertLongToByteReverse(id);
long[] ref_nodes = ref_index.FindAll(key, false); // Get all avl node ids for obj id
ref_index.delete_node(key, -1); // Remove reference record
for (int i = 0; i < ref_nodes.Length; i++)
{
this.get_index(this.GetAllocation(ref_nodes[i]).ReadLong(VSAvlNode.INDEX_POS)).delete_avl_node(ref_nodes[i], id);
}
}
}
/// <summary>
/// Convert long to byte array
/// </summary>
/// <param name="value"></param>
/// <returns></returns>
private static string GetAddressSignature(long value)
{
//string s = VSLib.ConvertLongToHexString(value);
byte[] b = VSLib.ConvertLongToByte(value);
int n = 0;
for (int i = 0; i < b.Length; i++)
{
n += b[i] + (i * 8);
if (n > 9999)
{
n -= 9999;
}
}
return(n.ToString("D4"));
}
/// <summary>
/// Array of the field names by pattern
/// </summary>
public string[] GetFields(string pattern = "*")
{
sync_cache();
if (FCache == null)
{
return(new string[0]);
}
List <string> ls = new List <string>();
for (int i = 0; i < FCache.Count; i++)
{
if (VSLib.Compare(pattern, FCache[i].NAME))
{
ls.Add(FCache[i].NAME);
}
}
return(ls.ToArray());
}
/// <summary>
/// Calculate new signature
/// </summary>
/// <returns></returns>
public string CalculateSignature()
{
ulong chs = (ulong)((Id * 123456789) - space_size_pg * 3 + extension_pg * 5 - page_size_kb * 7 + partitions * 9 - VSLib.ConvertStringToByte(CONFIG.ste)[0]);
byte[] x = VSLib.ConvertStringToByte(indexspace.Trim().ToLower());
for (int i = 0; i < x.Length; i++)
{
chs += (ulong)(x[i] * 3);
}
x = VSLib.ConvertStringToByte(name.Trim().ToLower());
for (int i = 0; i < x.Length; i++)
{
chs += (ulong)(x[i] * 5);
}
signature = VSLib.ConvertULongToHexString(chs);
return(signature);
}
/// <summary>
/// Empty path - In Memory Option
/// </summary>
/// <param name="path"></param>
public VSCatalog(string path)
{
this.dl = new List <VSCatalogDescriptor>();
if (path == "")
{
catalog_file_name = "";
backup_file_name = "";
CATALOG_DIR = "~IMO~";
}
else
{
catalog_file_name = path + "\\" + DEFS.CTLG_FILE_NAME;
backup_file_name = catalog_file_name + ".bak";
string[] s = VSLib.Parse(path, "\\");
CATALOG_DIR = s[s.Length - 1];
Load();
}
}
internal const long FBQE_HEADER_LENGTH = LAST_Q_POS + LAST_Q_LEN + 4; // 4-reserve
///////////////////////////////////////////////////
///////////////////// METHODS /////////////////////
///////////////////////////////////////////////////
/// <summary>
/// Get by index
/// </summary>
/// <param name="idx"></param>
/// <returns></returns>
public FBQE GetFBQE(int idx)
{
FBQE f = new FBQE();
f.index = idx;
f.address = idx * FBQE_LENGTH;
f.SG = VSLib.ConvertByteToString(VSLib.GetByteArray(buffer, f.address + SG_POS, SG_LEN));
f.ADDRESS_START = VSLib.ConvertByteToLong(VSLib.GetByteArray(buffer, f.address + ADDRESS_START_POS, ADDRESS_START_LEN));
f.ADDRESS_END = VSLib.ConvertByteToLong(VSLib.GetByteArray(buffer, f.address + ADDRESS_END_POS, ADDRESS_END_LEN));
f.LENGTH = VSLib.ConvertByteToLong(VSLib.GetByteArray(buffer, f.address + LENGTH_POS, LENGTH_LEN));
f.PREV = VSLib.ConvertByteToInt(VSLib.GetByteArray(buffer, f.address + PREV_POS, PREV_LEN));
f.NEXT = VSLib.ConvertByteToInt(VSLib.GetByteArray(buffer, f.address + NEXT_POS, NEXT_LEN));
if (f.SG != DEFS.FBQE_SIGNATURE)
{
throw new VSException(DEFS.E0006_INVALID_SIGNATURE_CODE, "(FBQE)");
}
return(f);
}
/// <summary>
/// Reset by key
/// </summary>
/// <param name="key"></param>
public void Reset(long key, bool partial = false)
{
_current = -1;
if (ROOT >= 0)
{
int id = find(VSLib.ConvertLongToByteReverse(key), (partial? 1 : 0));
if (id >= 0)
{
_action = Action.Current;
_current = _right = id;
}
else
{
_action = Action.End;
}
}
else
{
_action = Action.End;
}
}
/// <summary>
/// Display space/storage name
/// </summary>
/// <param name="name"></param>
/// <returns></returns>
public string[] List(string name = "*")
{
List <string> l = new List <string>();
string[] sp_list = GetSpaceNameList();
bool nf = false;
long sz = GetStorageSize();
if (name == "*")
{
l.Add("Storage size: " + sz.ToString("#,#;(#,#)") + " bytes (" + (sz / 1048576).ToString("#,#;(#,#)") + " Mb)");
}
for (int i = 0; i < sp_list.Length; i++)
{
if (l.Count > 0)
{
l.Add(" ");
}
if (VSLib.Compare(name.Trim().ToLower(), sp_list[i]))
{
nf = true;
string[] info = GetSpaceHeaderInfo(sp_list[i]);
for (int j = 0; j < info.Length; j++)
{
l.Add(info[j]);
}
}
}
if (!nf)
{
l.Add("No space found matching search criteria '" + name + "'");
}
return(l.ToArray());
}
/// <summary>
/// Remove space: name: space name
/// </summary>
/// <param name="name"></param>
/// <returns></returns>
public void Remove(string name)
{
if (state != DEFS.STATE_DEFINED)
{
throw new VSException(DEFS.E0025_STORAGE_UNABLE_TO_COMPLETE_CODE, "- 'Remove' (storage is opened or undefined)");
}
if (!this.Lock())
{
throw new VSException(DEFS.E0001_UNABLE_TO_LOCK_CODE, "(Remove space)");
}
for (int n = (CATALOG.Count - 1); n >= 0; n--)
{
if (VSLib.Compare(name, CATALOG[n].Name))
{
if (!IMO)
{
for (int i = 0; i < CATALOG[n].Partitions; i++)
{
System.IO.File.Delete(GetSpaceFileName(CATALOG[n].Name, CATALOG[n].Path, i));
}
FileStream fp = new FileStream(TransactionFileName, FileMode.Create);
fp.Close();
CATALOG.Delete(CATALOG[n].Name);
CATALOG.Save();
}
else
{
CATALOG.Delete(CATALOG[n].Name);
}
}
}
Release();
}
/// <summary>
/// Delete index (string key)
/// </summary>
/// <param name="key"></param>
/// <param name="id">For non-unique index. 0 - delete a </param>
/// <returns></returns>
public bool Delete(string key, long id)
{
byte[] k = VSLib.ConvertStringToByte(key);
return(this.Delete(k, id));
}
/// <summary>
/// Check if node exists (string key)
/// </summary>
/// <param name="key"></param>
/// <param name="partial"></param>
/// <returns>true/false</returns>
public bool Exists(string key, bool partial = false)
{
return(Exists(VSLib.ConvertStringToByte(key), partial));
}
/// <summary>
/// Get ID by full or partial string key (first if if non-unique index)
/// </summary>
/// <param name="k"></param>
/// <returns></returns>
public long Find(string key, bool partial = false)
{
byte[] k = VSLib.ConvertStringToByte(key);
return(Find(k, partial));
}
/// <summary>
/// Read u=short
/// </summary>
/// <param name="address"></param>
/// <returns></returns>
public ushort ReadUShort(long address)
{
return(VSLib.ConvertByteToUShort(ReadBytes(address, 2)));
}
/// <summary>
/// Read long
/// </summary>
/// <param name="address"></param>
/// <returns></returns>
public long ReadLong(long address)
{
return(VSLib.ConvertByteToLong(ReadBytes(address, 8)));
}