Annotation of parser3/src/include/pa_table.h, revision 1.37
1.14 paf 1: /** @file
1.15 paf 2: Parser: table class decl.
3:
1.9 paf 4: Copyright (c) 2001 ArtLebedev Group (http://www.artlebedev.com)
1.36 paf 5: Author: Alexander Petrosyan <paf@design.ru> (http://paf.design.ru)
1.9 paf 6:
1.37 ! paf 7: $Id: pa_table.h,v 1.36 2001/11/05 11:46:25 paf Exp $
1.1 paf 8: */
9:
10: #ifndef PA_TABLE_H
11: #define PA_TABLE_H
12:
1.33 parser 13: #include "pa_config_includes.h"
1.1 paf 14: #include "pa_types.h"
15: #include "pa_array.h"
16: #include "pa_hash.h"
1.2 paf 17: #include "pa_string.h"
1.1 paf 18:
1.16 paf 19: /**
1.19 paf 20: VTable backend.
1.16 paf 21:
22: holds:
1.14 paf 23: - column names[if any]
24: - data rows
25: - current row pointer
26:
27: uses String for column names and data items
28:
1.28 paf 29: hence most of tables are "named", no need to uptimize nameless onces.
30: rows and strings stored are read-only. once stored they can be removed,
31: but not altered. that's handy for quick copying & co. see table:join
1.14 paf 32: */
1.1 paf 33: class Table : public Array {
34: public:
35:
1.11 paf 36: Table(Pool& apool,
1.21 paf 37: const String *aorigin,
1.34 parser 38: const Array *acolumns,
1.2 paf 39: int initial_rows=CR_INITIAL_ROWS_DEFAULT);
40:
1.21 paf 41: /// where this table came from, may be NULL
42: const String *origin_string() { return forigin_string; }
43:
1.14 paf 44: /// column names
1.5 paf 45: const Array *columns() { return fcolumns; }
46:
1.18 paf 47: /// moves @a current pointer
1.5 paf 48: void set_current(int acurrent) { fcurrent=acurrent; }
1.17 paf 49: /// @return current pointer
1.25 paf 50: int current() { return fcurrent; }
1.37 ! paf 51: void offset(bool absolute, int offset);
1.5 paf 52:
1.32 paf 53: /** @return column index from @a column_name. '<0' if no such column
54: if no such colum conditionally 'bark'
55: */
56: int column_name2index(const String& column, bool bark) const;
1.30 paf 57:
1.26 paf 58: /// @return item from @a column
59: const String *item(int column) const;
1.30 paf 60:
61: /// @return item from @a column. '0' if no such column
62: const String *item(const String& column) const {
1.32 paf 63: int index=column_name2index(column, false);
1.30 paf 64: return index>=0?item(index):0;
1.24 paf 65: }
1.23 paf 66:
67: /// saves to text file
68: void save(bool nameless_save, const String& file_spec);
1.2 paf 69:
1.26 paf 70: bool locate(int column, const String& value);
1.31 paf 71: bool locate(const String& column, const String& value);
1.24 paf 72:
1.27 paf 73: const Array& at(int index) const {
74: // force @c const result
75: return *const_cast<const Array *>(static_cast<Array *>(get(index)));
76: }
77:
1.12 paf 78: private:
1.21 paf 79:
80: // where this table came from, may be NULL
81: const String *forigin_string;
1.5 paf 82:
1.1 paf 83: // column name->number lookup table
84: Hash name2number;
85:
1.5 paf 86: // current row
87: int fcurrent;
88:
89: // columns
1.34 parser 90: const Array *fcolumns;
1.5 paf 91:
1.24 paf 92: bool valid(int index) const { return index>=0 && index<size(); }
1.2 paf 93:
1.1 paf 94: };
95:
96: #endif
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