--- parser3/src/include/pa_table.h	2001/01/29 15:56:03	1.1
+++ parser3/src/include/pa_table.h	2003/04/14 11:22:53	1.50
@@ -1,31 +1,110 @@
-/*
-  $Id: pa_table.h,v 1.1 2001/01/29 15:56:03 paf Exp $
+/** @file
+	Parser: table class decl.
+
+	Copyright (c) 2001, 2003 ArtLebedev Group (http://www.artlebedev.com)
+	Author: Alexandr Petrosian <paf@design.ru> (http://paf.design.ru)
 */
 
 #ifndef PA_TABLE_H
 #define PA_TABLE_H
 
+static const char* IDENT_TABLE_H="$Date: 2003/04/14 11:22:53 $";
+
 #include "pa_types.h"
 #include "pa_array.h"
 #include "pa_hash.h"
+#include "pa_string.h"
+
+/** 
+	VTable backend.
 
+	holds:
+	- column names[if any]
+	- data rows
+	- current row pointer
+
+	uses String for column names and data items
+
+	hence most of tables are "named", no need to uptimize nameless onces.
+	rows and strings stored are read-only. once stored they can be removed,
+	but not altered. that's handy for quick copying & co. see table:join
+*/
 class Table : public Array {
 public:
+	struct Action_options {
+	     int offset;
+	     int limit; //< negative limit means 'all'. zero limit means 'nothing'
+	     bool reverse;
+	     bool defined;
+
+	     Action_options(): offset(0), limit(-1), reverse(false), defined(false) {}
+	};
+
+	Table(Pool& apool,
+		const String *aorigin,
+		const Array *acolumns,
+		int initial_rows=CR_INITIAL_ROWS_DEFAULT);
+	Table(Pool& apool, const Table& source, Action_options& options);
+
+	/// where this table came from, may be NULL
+	const String *origin_string() { return forigin_string; }
 
-	// the base origin of table data
-	Origin origin;
+	/// gets column names
+	const Array *columns() { return fcolumns; }
 
-	// columns order
-	Array *columns_order;
+	/// assignes column names
+	void set_columns(const Array *acolumns) { fcolumns=acolumns; }
+
+	/// moves @a current pointer
+	void set_current(int acurrent) {  fcurrent=acurrent; }
+	
+	/// @return current pointer
+	int current() const { return fcurrent; }
+	void offset(bool absolute, int offset);
+
+	/** @return column index from @a column_name. '<0' if no such column
+		if no such colum conditionally 'bark'
+	*/
+	int column_name2index(const String& column, bool bark) const;
+
+	/// @return item from @a column
+	const String *item(int column) const;
+
+	/// @return item from @a column. '0' if no such column
+	const String *item(const String& column) const {
+		int index=column_name2index(column, false);
+		return index>=0?item(index):0;
+	}
+
+	/// saves to text file
+	void save(bool nameless_save, const String& file_spec);
+
+	typedef bool (*locate_func)(Table& self, void* info);
+	bool locate(locate_func func, void* info, Action_options& options);
+	bool locate(int column, const String& value, Action_options& options);
+	bool locate(const String& column, const String& value, Action_options& options);
+
+	const Array& at(int index) const {
+		// force @c const result
+		return *const_cast<const Array *>(static_cast<Array *>(get(index)));
+	}
+
+private:
+	
+	// where this table came from, may be NULL
+	const String *forigin_string;
 
 	// column name->number lookup table
-	// hence most of tables are "named", no need to uptimize unnamed onces
-	Hash name2number;
+	Hash& name2number;
+
+	// current row
+	int fcurrent;
+
+	// columns
+	const Array *fcolumns;
+
+	bool valid(int index) const { return index>=0 && index<size(); }
 
-	Table(Pool *apool, 
-		char *afile, uint aline, 
-		Array *acolumns, 
-		int initial_rows=CR_INITIAL_ROWS_DEFAULT);
 };
 
 #endif