|
|
| version 1.10, 2001/03/10 16:34:39 | version 1.55, 2003/04/14 11:22:53 |
|---|---|
| Line 1 | Line 1 |
| /* | /** @file |
| Parser | Parser: table class. |
| Copyright (c) 2001 ArtLebedev Group (http://www.artlebedev.com) | |
| Author: Alexander Petrosyan <paf@design.ru> | |
| $Id$ | Copyright (c) 2001, 2003 ArtLebedev Group (http://www.artlebedev.com) |
| Author: Alexandr Petrosian <paf@design.ru> (http://paf.design.ru) | |
| */ | */ |
| #include <stdlib.h> | static const char* IDENT_TABLE_C="$Date$"; |
| //#include <stdlib.h> | |
| #include "pa_table.h" | #include "pa_table.h" |
| #include "pa_pool.h" | #include "pa_pool.h" |
| #include "pa_exception.h" | |
| Table::Table(Request& arequest, | Table::Table(Pool& apool, |
| char *afile, uint aline, | const String *aorigin_string, |
| Array *acolumns, | const Array *acolumns, |
| int initial_rows) : | int initial_rows) : |
| Array(arequest.pool(), initial_rows), | Array(apool, initial_rows), |
| request(arequest), | |
| forigin_string(aorigin_string), | |
| fcurrent(0), | fcurrent(0), |
| fcolumns(acolumns), | fcolumns(acolumns), |
| name2number(arequest.pool(), false) { | name2number(*NEW Hash(pool())) { |
| #ifndef NO_STRING_ORIGIN | |
| forigin.file=afile; | |
| forigin.line=aline; | |
| #endif | |
| if(fcolumns) | if(fcolumns) |
| for(int i=0; i<fcolumns->size(); i++) { | for(int i=0; i<fcolumns->size(); i++) { |
| String name(arequest.pool()); | const String& name=*fcolumns->get_string(i); |
| name.APPEND(fcolumns->get_cstr(i), 0, 0, 0); | |
| name2number.put(name, i+1); | name2number.put(name, i+1); |
| } | } |
| } | } |
| const Array &Table::at(int index) { | Table::Table(Pool& apool, const Table& source, Action_options& options) : |
| if(index<0 || index>=size()) | Array(apool, options.limit/*may be more than needed, no harm done*/), |
| THROW(0, 0, | |
| 0, | forigin_string(source.forigin_string), |
| "table row index %d is out of range [0..%d]", | fcurrent(0), |
| index, size()-1); | fcolumns(source.fcolumns), |
| name2number(source.name2number) { | |
| return *static_cast<const Array *>(get(index)); | |
| } | append_array(source, options.offset, options.limit, options.reverse); |
| } | |
| const char *Table::item(int index) { | |
| const Array& row=at(fcurrent); | int Table::column_name2index(const String& column_name, bool bark) const { |
| return row.get_cstr(index); | if(fcolumns) {// named |
| } | int result=name2number.get_int(column_name)-1; // -1 = column not found |
| if(bark && result<0) | |
| const char *Table::item(const String& column_name) { | throw Exception("parser.runtime", |
| int column_index; | &column_name, |
| if(fcolumns) { | |
| int found_index=name2number.get_int(column_name); | |
| if(found_index) | |
| column_index=found_index-1; | |
| else | |
| THROW(0, 0, | |
| &column_name, | |
| "column not found"); | "column not found"); |
| } else { | return result; |
| column_index=atoi(column_name.cstr()); | } else { // nameless |
| char *error_pos; | |
| const char *cstr=column_name.cstr(); | |
| int result=(int)strtol(cstr, &error_pos, 0); | |
| if(*error_pos/*not EOS*/) { | |
| result=-1; | |
| if(bark) | |
| throw Exception("parser.runtime", | |
| &column_name, | |
| "invalid column number"); | |
| } | |
| return result; | |
| } | |
| } | |
| const String *Table::item(int column) const { | |
| if(valid(fcurrent)) { | |
| const Array& row=at(fcurrent); | const Array& row=at(fcurrent); |
| if(column_index<0 || column_index>=row.size()) | if(column>=0 && column<row.size()) // proper index? |
| return 0; | return row.get_string(column); |
| /* | |
| request.exception().raise(0, 0, | |
| &column_name, | |
| "table column index %d is out of range [0..%d]", | |
| column_index, row->size()-1); | |
| */ | |
| } | } |
| return 0; // it's OK we don't have row|column, just return nothing | |
| } | |
| bool Table::locate(Table::locate_func func, void *info, Table::Action_options& o) { | |
| int size=this->size(); | |
| int row=o.offset; | |
| if(!size || !o.limit || row>=size) | |
| return false; | |
| // max(limit) | |
| int m=o.reverse? | |
| row | |
| :size-row; | |
| if(!m) | |
| return false; | |
| // fix o.limit | |
| if(o.limit<0 || o.limit>m) | |
| o.limit=m; | |
| int saved_current=current(); | |
| if(o.reverse) { // reverse | |
| int to=max(0, row-o.limit); | |
| for(; row>=to; --row) { | |
| set_current(row); | |
| if(func(*this, info)) | |
| return true; | |
| } | |
| } else { // forward | |
| int to=min(row+o.limit, size); | |
| for(; row<to; row++) { | |
| set_current(row); | |
| if(func(*this, info)) | |
| return true; | |
| } | |
| } | |
| set_current(saved_current); | |
| return false; | |
| } | |
| #ifndef DOXYGEN | |
| struct Locate_int_string_info { | |
| int column; | |
| const String* value; | |
| }; | |
| #endif | |
| bool locate_int_string(Table& self, void* ainfo) { | |
| Locate_int_string_info& info=*static_cast<Locate_int_string_info*>(ainfo); | |
| const String *item_value=self.item(info.column); | |
| return item_value && *item_value==*info.value; | |
| } | |
| bool Table::locate(int column, const String& value, | |
| Table::Action_options& options) { | |
| Locate_int_string_info info={column, &value}; | |
| return locate(locate_int_string, &info, options); | |
| } | |
| bool Table::locate(const String& column, const String& value, | |
| Table::Action_options& options) { | |
| return locate(column_name2index(column, true), value, options); | |
| } | |
| return item(column_index); | void Table::offset(bool absolute, int offset) { |
| if(size()) | |
| fcurrent=((absolute?0:fcurrent)+offset+size())%size(); | |
| } | } |