Annotation of parser3/src/main/pa_table.C, revision 1.55
1.14 paf 1: /** @file
1.15 paf 2: Parser: table class.
3:
1.53 paf 4: Copyright (c) 2001, 2003 ArtLebedev Group (http://www.artlebedev.com)
1.44 paf 5: Author: Alexandr Petrosian <paf@design.ru> (http://paf.design.ru)
1.48 paf 6: */
1.15 paf 7:
1.55 ! paf 8: static const char* IDENT_TABLE_C="$Date: 2003/04/11 15:00:05 $";
1.1 paf 9:
1.48 paf 10: //#include <stdlib.h>
1.2 paf 11:
1.1 paf 12: #include "pa_table.h"
13: #include "pa_pool.h"
1.25 paf 14: #include "pa_exception.h"
1.1 paf 15:
1.12 paf 16: Table::Table(Pool& apool,
1.18 paf 17: const String *aorigin_string,
1.35 parser 18: const Array *acolumns,
1.1 paf 19: int initial_rows) :
1.12 paf 20: Array(apool, initial_rows),
1.13 paf 21:
1.18 paf 22: forigin_string(aorigin_string),
1.5 paf 23: fcurrent(0),
24: fcolumns(acolumns),
1.47 paf 25: name2number(*NEW Hash(pool())) {
1.1 paf 26:
1.5 paf 27: if(fcolumns)
28: for(int i=0; i<fcolumns->size(); i++) {
1.12 paf 29: const String& name=*fcolumns->get_string(i);
1.2 paf 30: name2number.put(name, i+1);
1.1 paf 31: }
1.42 paf 32: }
33:
1.54 paf 34: Table::Table(Pool& apool, const Table& source, Action_options& options) :
35: Array(apool, options.limit/*may be more than needed, no harm done*/),
1.42 paf 36:
37: forigin_string(source.forigin_string),
1.51 paf 38: fcurrent(0),
1.42 paf 39: fcolumns(source.fcolumns),
40: name2number(source.name2number) {
41:
1.54 paf 42: append_array(source, options.offset, options.limit, options.reverse);
1.2 paf 43: }
44:
1.29 paf 45: int Table::column_name2index(const String& column_name, bool bark) const {
46: if(fcolumns) {// named
47: int result=name2number.get_int(column_name)-1; // -1 = column not found
48: if(bark && result<0)
1.45 paf 49: throw Exception("parser.runtime",
1.29 paf 50: &column_name,
51: "column not found");
52: return result;
53: } else { // nameless
1.36 parser 54: char *error_pos;
55: const char *cstr=column_name.cstr();
56: int result=(int)strtol(cstr, &error_pos, 0);
1.37 parser 57: if(*error_pos/*not EOS*/) {
58: result=-1;
1.30 paf 59: if(bark)
1.45 paf 60: throw Exception("parser.runtime",
1.30 paf 61: &column_name,
62: "invalid column number");
63: }
1.24 paf 64: return result;
65: }
1.21 paf 66: }
67:
1.22 paf 68: const String *Table::item(int column) const {
1.21 paf 69: if(valid(fcurrent)) {
1.7 paf 70: const Array& row=at(fcurrent);
1.22 paf 71: if(column>=0 && column<row.size()) // proper index?
72: return row.get_string(column);
1.21 paf 73: }
74: return 0; // it's OK we don't have row|column, just return nothing
75: }
76:
1.54 paf 77: bool Table::locate(Table::locate_func func, void *info, Table::Action_options& o) {
78: int size=this->size();
1.55 ! paf 79: int row=o.offset;
! 80: if(!size || !o.limit || row>=size)
1.54 paf 81: return false;
1.55 ! paf 82: // max(limit)
! 83: int m=o.reverse?
! 84: row
! 85: :size-row;
! 86: if(!m)
! 87: return false;
! 88: // fix o.limit
! 89: if(o.limit<0 || o.limit>m)
! 90: o.limit=m;
1.54 paf 91:
92: int saved_current=current();
93: if(o.reverse) { // reverse
94: int to=max(0, row-o.limit);
95: for(; row>=to; --row) {
96: set_current(row);
97:
98: if(func(*this, info))
99: return true;
100: }
101: } else { // forward
102: int to=min(row+o.limit, size);
103: for(; row<to; row++) {
104: set_current(row);
105:
106: if(func(*this, info))
107: return true;
108: }
1.2 paf 109: }
1.54 paf 110: set_current(saved_current);
1.2 paf 111:
1.21 paf 112: return false;
1.28 paf 113: }
114:
1.54 paf 115: #ifndef DOXYGEN
116: struct Locate_int_string_info {
117: int column;
118: const String* value;
119: };
120: #endif
121: bool locate_int_string(Table& self, void* ainfo) {
122: Locate_int_string_info& info=*static_cast<Locate_int_string_info*>(ainfo);
123:
124: const String *item_value=self.item(info.column);
125: return item_value && *item_value==*info.value;
126: }
127:
128: bool Table::locate(int column, const String& value,
129: Table::Action_options& options) {
130: Locate_int_string_info info={column, &value};
131: return locate(locate_int_string, &info, options);
132: }
133:
134: bool Table::locate(const String& column, const String& value,
135: Table::Action_options& options) {
136: return locate(column_name2index(column, true), value, options);
1.22 paf 137: }
138:
1.41 paf 139: void Table::offset(bool absolute, int offset) {
1.22 paf 140: if(size())
1.41 paf 141: fcurrent=((absolute?0:fcurrent)+offset+size())%size();
1.1 paf 142: }
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