Annotation of parser3/src/main/pa_table.C, revision 1.25
1.14 paf 1: /** @file
1.15 paf 2: Parser: table class.
3:
1.10 paf 4: Copyright (c) 2001 ArtLebedev Group (http://www.artlebedev.com)
1.15 paf 5:
1.11 paf 6: Author: Alexander Petrosyan <paf@design.ru> (http://design.ru/paf)
1.10 paf 7:
1.25 ! paf 8: $Id: pa_table.C,v 1.24 2001/03/29 20:53:04 paf Exp $
1.1 paf 9: */
10:
1.2 paf 11: #include <stdlib.h>
12:
1.1 paf 13: #include "pa_table.h"
14: #include "pa_pool.h"
1.25 ! paf 15: #include "pa_exception.h"
1.1 paf 16:
1.12 paf 17: Table::Table(Pool& apool,
1.18 paf 18: const String *aorigin_string,
1.1 paf 19: Array *acolumns,
20: int initial_rows) :
1.12 paf 21: Array(apool, initial_rows),
1.13 paf 22:
1.18 paf 23: forigin_string(aorigin_string),
1.5 paf 24: fcurrent(0),
25: fcolumns(acolumns),
1.12 paf 26: name2number(pool(), false) {
1.1 paf 27:
1.5 paf 28: if(fcolumns)
29: for(int i=0; i<fcolumns->size(); i++) {
1.12 paf 30: const String& name=*fcolumns->get_string(i);
1.2 paf 31: name2number.put(name, i+1);
1.1 paf 32: }
1.2 paf 33: }
34:
1.21 paf 35: int Table::column_name2index(const String& column_name) const {
1.12 paf 36: if(fcolumns) { // named
1.22 paf 37: int column_number=name2number.get_int(column_name);
38: if(column_number)
39: return column_number-1;
40: else {
1.9 paf 41: THROW(0, 0,
1.6 paf 42: &column_name,
43: "column not found");
1.22 paf 44: return 0; // unreached
45: }
1.24 paf 46: } else { // nameless
47: char *error_pos=0;
48: int result=(int)strtol(column_name.cstr(), &error_pos, 0);
49: if(error_pos && *error_pos)
50: THROW(0, 0,
51: &column_name,
52: "invalid column number");
53: return result;
54: }
1.21 paf 55: }
56:
1.22 paf 57: const String *Table::item(int column) const {
1.21 paf 58: if(valid(fcurrent)) {
1.7 paf 59: const Array& row=at(fcurrent);
1.22 paf 60: if(column>=0 && column<row.size()) // proper index?
61: return row.get_string(column);
1.21 paf 62: }
63: return 0; // it's OK we don't have row|column, just return nothing
64: }
65:
1.23 paf 66: bool Table::locate(int column, const String& value) {
1.22 paf 67: for(fcurrent=0; fcurrent<size(); fcurrent++) {
1.23 paf 68: const String *item_value=item(column);
1.21 paf 69: if(item_value && *item_value==value)
70: return true;
1.2 paf 71: }
72:
1.21 paf 73: fcurrent=0;
74: return false;
1.22 paf 75: }
76:
77: void Table::shift(int offset) {
78: if(size())
79: fcurrent=(fcurrent+offset+size())%size();
1.1 paf 80: }
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