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Diff for /parser3/src/include/pa_table.h between versions 1.1 and 1.48.2.11.2.6

version 1.1, 2001/01/29 15:56:03 version 1.48.2.11.2.6, 2003/03/26 18:52:49
Line 1 Line 1
 /*  /** @file
   $Id$          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  #ifndef PA_TABLE_H
 #define PA_TABLE_H  #define PA_TABLE_H
   
   static const char* IDENT_TABLE_H="$Date$";
   
 #include "pa_types.h"  #include "pa_types.h"
 #include "pa_array.h"  
 #include "pa_hash.h"  #include "pa_hash.h"
   #include "pa_string.h"
   
   /** 
           VTable backend.
   
           holds:
           - column names[if any]
           - data rows
           - current row pointer
   
 class Table : public Array {          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<ArrayString*> {
 public:  public:
           typedef ArrayString* columns_type;
   
         // the base origin of table data          Table(
         Origin origin;                  columns_type acolumns,
                   int initial_rows=3);
           Table(const Table& src, int offset=0, int limit=0);
   
           /// gets column names
           columns_type columns() { return fcolumns; }
   
           /// 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 - 'bark'
           */
           int column_name2index(const String& column, bool bark) const;
   
           /// @return item from @a column
           const String* item(size_t column);
   
           /// @return item from @a column. '0' if no such column
           const String* item(const String& column) {
                   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);
   
           bool locate(size_t column, const String& value);
           bool locate(const String& column, const String& value);
   
   private:
           
           // current row
           size_t fcurrent;
   
         // columns order          // columns
         Array *columns_order;          columns_type fcolumns;
   
           // column names are already referenced in fcolumns, no need to doublecheck references here
         // column name->number lookup table          // column name->number lookup table
         // hence most of tables are "named", no need to uptimize unnamed onces          typedef Hash<const StringBody, int> name2number_hash_class;
         Hash name2number;          name2number_hash_class* name2number;
   
           // we own columns?
   
           bool valid(size_t index) const { return index>=0 && index<count(); }
   
         Table(Pool *apool,   
                 char *afile, uint aline,   
                 Array *acolumns,   
                 int initial_rows=CR_INITIAL_ROWS_DEFAULT);  
 };  };
   
 #endif  #endif
Removed from v.1.1  
changed lines
  Added in v.1.48.2.11.2.6

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