--- parser3/src/classes/table.C 2003/04/03 10:48:25 1.172.2.14.2.24 +++ parser3/src/classes/table.C 2003/09/29 11:03:21 1.185 @@ -5,7 +5,7 @@ Author: Alexandr Petrosian (http://paf.design.ru) */ -static const char* IDENT_TABLE_C="$Date: 2003/04/03 10:48:25 $"; +static const char* IDENT_TABLE_C="$Date: 2003/09/29 11:03:21 $"; #include "classes.h" #include "pa_vmethod_frame.h" @@ -40,6 +40,7 @@ DECLARE_CLASS_VAR(table, new MTable, 0); #define SQL_OFFSET_NAME "offset" #define SQL_DEFAULT_NAME "default" #define SQL_DISTINCT_NAME "distinct" +#define TABLE_REVERSE_NAME "reverse" // globals @@ -47,60 +48,84 @@ String sql_limit_name(SQL_LIMIT_NAME); String sql_offset_name(SQL_OFFSET_NAME); String sql_default_name(SQL_DEFAULT_NAME); String sql_distinct_name(SQL_DISTINCT_NAME); +String table_reverse_name(TABLE_REVERSE_NAME); // methods -static void get_copy_options(Request& r, MethodParams& params, size_t param_index, - const Table& source, - int& offset, - int& limit) { - - offset=0; - limit=0; - if(params.count()<=param_index) - return; - - Value& voptions=params.as_no_junction(param_index, "options must be hash, not code"); - if(!voptions.is_string()) { - if(HashStringValue* options=voptions.get_hash()) { - int valid_options=0; - if(Value* voffset=options->get(sql_offset_name)) { - valid_options++; - if(voffset->is_string()) { - const String& soffset=*voffset->get_string(); - if(soffset == "cur") - offset=source.current(); - else - throw Exception("parser.runtime", - &soffset, - "must be 'cur' string or expression"); - } else - offset=r.process_to_value(*voffset).as_int(); - } - if(Value* vlimit=options->get(sql_limit_name)) { - valid_options++; - limit=r.process_to_value(*vlimit).as_int(); - if(!limit) // zero limit = should be 'nothing to copy', for methods zero means 'all' - limit=-1; // thus fixing - } - if(valid_options!=options->count()) - throw Exception("parser.runtime", - 0, - "called with invalid option"); - } else - throw Exception("parser.runtime", - 0, - "options must be hash"); +static Table::Action_options get_action_options(Request& r, MethodParams& params, + const Table& source) { + Table::Action_options result; + if(!params.count()) + return result; + + Value& maybe_options=params.last(); +/* can not do it: + want to enable ^table::create[$source; +# $.option[] + ] + but there is ^table.locate[name;value] + + if(maybe_options.is_string()) { // allow empty options + result.defined=true; + return result; } +*/ + HashStringValue* options=maybe_options.get_hash(); + if(!options) + return result; + + result.defined=true; + bool defined_offset=false; + + int valid_options=0; + if(Value* voffset=options->get(sql_offset_name)) { + valid_options++; + defined_offset=true; + if(voffset->is_string()) { + const String& soffset=*voffset->get_string(); + if(soffset == "cur") + result.offset=source.current(); + else + throw Exception("parser.runtime", + &soffset, + "must be 'cur' string or expression"); + } else + result.offset=r.process_to_value(*voffset).as_int(); + } + if(Value* vlimit=options->get(sql_limit_name)) { + valid_options++; + result.limit=r.process_to_value(*vlimit).as_int(); + } + if(Value *vreverse=(Value *)options->get(table_reverse_name)) { + valid_options++; + result.reverse=r.process_to_value(*vreverse).as_bool(); + if(result.reverse && !defined_offset) + result.offset=source.count()-1; + } + + if(valid_options!=options->count()) + throw Exception("parser.runtime", + 0, + "called with invalid option"); + + return result; +} +static void check_option_param(bool options_defined, + MethodParams& params, size_t next_param_index, + const char *msg) { + if(next_param_index+(options_defined?1:0) != params.count()) + throw Exception("parser.runtime", + 0, + "%s", msg); } static void _create(Request& r, MethodParams& params) { // clone/copy part? - if(Table *source=params[0]->get_table()) { - int offset, limit; - get_copy_options(r, params, 1, *source, - offset, limit); - GET_SELF(r, VTable).set_table(*new Table(*source, offset, limit)); + if(Table *source=params[0].get_table()) { + Table::Action_options o=get_action_options(r, params, *source); + check_option_param(o.defined, params, 1, + "too many parameters"); + GET_SELF(r, VTable).set_table(*new Table(*source, o)); return; } @@ -156,7 +181,7 @@ static void _load(Request& r, MethodPara size_t options_param_index=filename_param_index+1; // loading text - char *data=file_read_text(r.charsets.source(), + char *data=file_read_text(r.charsets, r.absolute(params.as_string(filename_param_index, "file name must be string")), true, options_param_index i(*table.columns()); i.has_next(); ) { sdata.append(*i.next(), String::L_TABLE); if(i.has_next()) - sdata.append_help_length("\t", 1, String::L_CLEAN); + sdata.append_know_length("\t", 1, String::L_CLEAN); } } else { // nameless table if(int lsize=table.count()?table[0]->count():0) for(int column=0; column c(*i.next()); c.has_next(); ) { sdata.append(*c.next(), String::L_TABLE); if(c.has_next()) - sdata.append_help_length("\t", 1, String::L_CLEAN); + sdata.append_know_length("\t", 1, String::L_CLEAN); } - sdata.append_help_length("\n", 1, String::L_CLEAN); + sdata.append_know_length("\n", 1, String::L_CLEAN); } // write @@ -290,7 +318,7 @@ static void _offset(Request& r, MethodPa static void _menu(Request& r, MethodParams& params) { Value& body_code=params.as_junction(0, "body must be code"); - Value* delim_maybe_code=params.count()>1?params[1]:0; + Value* delim_maybe_code=params.count()>1?¶ms[1]:0; Table& table=GET_SELF(r, VTable).table(); bool need_delim=false; @@ -312,6 +340,7 @@ static void _menu(Request& r, MethodPara } #ifndef DOXYGEN +enum Table2hash_distint { D_ILLEGAL, D_FIRST, D_TABLES }; struct Row_info { Request *r; Table *table; @@ -319,7 +348,7 @@ struct Row_info { size_t key_field; Array* value_fields; HashStringValue* hash; - bool distinct; + Table2hash_distint distinct; size_t row; }; #endif @@ -335,37 +364,72 @@ static void table_row_to_hash(Table::ele if(!key) return; // ignore rows without key [too-short-record_array if-indexed] - VHash* vhash=new VHash; - HashStringValue& hash=vhash->hash(); - for(Array_iterator i(*info->value_fields); i.has_next(); ) { - size_t value_field=i.next(); - if(value_fieldcount()) - hash.put( - *info->table->columns()->get(value_field), - new VString(*row->get(value_field))); - } + switch(info->distinct) { + case D_ILLEGAL: case D_FIRST: + { + VHash* vhash=new VHash; + HashStringValue& hash=vhash->hash(); + for(Array_iterator i(*info->value_fields); i.has_next(); ) { + size_t value_field=i.next(); + if(value_fieldcount()) + hash.put( + *info->table->columns()->get(value_field), + new VString(*row->get(value_field))); + } - if(info->hash->put_dont_replace(*key, vhash)) // put. existed? - if(!info->distinct) - throw Exception("parser.runtime", - key, - "duplicate key"); + if(info->hash->put_dont_replace(*key, vhash)) // put. existed? + if(info->distinct==D_ILLEGAL) + throw Exception("parser.runtime", + key, + "duplicate key"); + } + break; + case D_TABLES: + { + VTable* vtable=(VTable*)info->hash->get(*key); // put. table existed? + Table* table; + if(vtable) + table=vtable->get_table(); + else { + // no? creating table of same structure as source + Table::Action_options table_options(0, 0); + table=new Table(*info->table, table_options/*no rows, just structure*/); + info->hash->put(*key, new VTable(table)); + } + *table+=row; + } + break; + default: + throw Exception(0, + 0, + "invalid distinct code (#%d)", info->distinct); + } } static void _hash(Request& r, MethodParams& params) { Table& self_table=GET_SELF(r, VTable).table(); VHash& result=*new VHash; if(Table::columns_type columns=self_table.columns()) if(columns->count()>0) { - bool distinct=false; + Table2hash_distint distinct=D_ILLEGAL; int param_index=params.count()-1; if(param_index>0) { if(HashStringValue* options= params.as_no_junction(param_index, "param must not be code").get_hash()) { --param_index; int valid_options=0; - if(Value* vdistinct=options->get(sql_distinct_name)) { + if(Value* vdistinct_code=options->get(sql_distinct_name)) { valid_options++; - distinct=r.process_to_value(*vdistinct).as_bool(); + Value& vdistinct_value=r.process_to_value(*vdistinct_code); + if(vdistinct_value.is_string()) { + const String& sdistinct=*vdistinct_value.get_string(); + if(sdistinct=="tables") + distinct=D_TABLES; + else + throw Exception("parser.runtime", + &sdistinct, + "must be 'tables' or true/false"); + } else + distinct=vdistinct_value.as_bool()?D_FIRST:D_ILLEGAL; } if(valid_options!=options->count()) throw Exception("parser.runtime", @@ -380,6 +444,10 @@ static void _hash(Request& r, MethodPara Array value_fields; if(param_index>0) { + if(distinct!=D_ILLEGAL && distinct!=D_FIRST) + throw Exception("parser.runtime", + 0, + "in distinct[tables] mode you may not specify value field(s)"); Value& value_fields_param=params.as_no_junction(param_index, "value field(s) must not be code"); if(value_fields_param.is_string()) { value_fields+=self_table.column_name2index( @@ -398,16 +466,17 @@ static void _hash(Request& r, MethodPara "value field(s) must be string or self_table" ); } else { // by all columns, including key - for(size_t i=0; icount(); i++) - value_fields+=i; + if(!(distinct!=D_ILLEGAL && distinct!=D_FIRST)) + for(size_t i=0; icount(); i++) + value_fields+=i; } { - Row_info info; + Row_info info={0}; info.r=&r; info.table=&self_table; - Value* key_param=params[0]; + Value* key_param=¶ms[0]; info.key_code=key_param->get_junction()?key_param:0; info.key_field=info.key_code?-1 :self_table.column_name2index(key_param->as_string(), true); @@ -492,48 +561,48 @@ static void _sort(Request& r, MethodPara GET_SELF(r, VTable).set_table(new_table); } -static bool _locate_expression(Request& r, MethodParams& params) { - if(params.count()>1) - throw Exception("parser.runtime", - 0, - "locate by expression has only one parameter - expression"); - +#ifndef DOXYGEN +struct Expression_is_true_info { + Request* r; + Value* expression_code; +}; +#endif +static bool expression_is_true(Table& self, void* ainfo) { + Expression_is_true_info& info=*static_cast(ainfo); + return info.r->process_to_value(*info.expression_code).as_bool(); +} +static bool _locate_expression(Table& table, Table::Action_options o, + Request& r, MethodParams& params) { + check_option_param(o.defined, params, 1, + "locate by expression only has parameters: expression and, maybe, options"); Value& expression_code=params.as_junction(0, "must be expression"); - Table& table=GET_SELF(r, VTable).table(); - int saved_current=table.current(); - int size=table.count(); - for(int row=0; row2) - throw Exception("parser.runtime", - 0, - "locate by name and value has only two parameters - name and value"); - - Table& table=GET_SELF(r, VTable).table(); - return table.locate( - params.as_string(0, "column name must be string"), - params.as_string(1, "value must be string") - ); +static bool _locate_name_value(Table& table, Table::Action_options o, + Request& r, MethodParams& params) { + check_option_param(o.defined, params, 2, + "locate by locate by name has parameters: name, value and, maybe, options"); + const String& name=params.as_string(0, "column name must be string"); + const String& value=params.as_string(1, "value must be string"); + return table.locate(name, value, o); } static void _locate(Request& r, MethodParams& params) { - bool result=params[0]->get_junction()? - _locate_expression(r, params) : - _locate_name_value(r, params); + Table& table=GET_SELF(r, VTable).table(); + + Table::Action_options o=get_action_options(r, params, table); + + bool result=params[0].get_junction()? + _locate_expression(table, o, r, params) : + _locate_name_value(table, o, r, params); r.write_no_lang(*new VBool(result)); } + static void _flip(Request& r, MethodParams& params) { Table& old_table=GET_SELF(r, VTable).table(); - Table& new_table=*new Table(old_table.columns()); + Table& new_table=*new Table(0); if(size_t old_count=old_table.count()) if(size_t old_cols=old_table[0]->count()) for(size_t column=0; columncolumns(); + size_t dest_columns_count=dest_columns->count(); + Table::element_type dest_row(new ArrayString(dest_columns_count)); + for(size_t dest_column=0; dest_columnget(dest_column)); + *dest_row+=src_item?src_item:new String; + } + *dest+=dest_row; +} +static void join_nameless_row(Table& src, Table* dest) { + *dest+=src[src.current()]; +} static void _join(Request& r, MethodParams& params) { Table* maybe_src=params.as_no_junction(0, "table ref must not be code").get_table(); if(!maybe_src) throw Exception("parser.runtime", 0, "source is not a table"); - Table& src=*maybe_src; + + Table::Action_options o=get_action_options(r, params, src); + check_option_param(o.defined, params, 1, + "invalid extra parameter"); + Table& dest=GET_SELF(r, VTable).table(); if(&src == &dest) throw Exception("parser.runtime", 0, "source and destination are same table"); - int offset, limit; - get_copy_options(r, params, 1, src, - offset, limit); - - if(Table::columns_type dest_columns=dest.columns()) { // dest is named - int saved_src_current=src.current(); - int m=src.count()-offset; - if(!limit || limit>m) - limit=m; - int end=offset+limit; - for(int src_row=offset; src_rowcount(); dest_column++) { - const String* src_item=src.item(*dest_columns->get(dest_column)); - *dest_row+=src_item?src_item:new String; - } - dest+=dest_row; - } - src.set_current(saved_src_current); - } else { // dest is nameless - size_t src_count=src.count(); - for(size_t src_row=0; src_row