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| version 1.8, 2001/03/12 20:59:27 | version 1.348, 2019/09/11 15:26:09 |
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| /* | /** @file |
| Parser | Parser: @b table parser class. |
| Copyright (c) 2001 ArtLebedev Group (http://www.artlebedev.com) | |
| Author: Alexander Petrosyan <paf@design.ru> (http://design.ru/paf) | |
| $Id$ | Copyright (c) 2001-2017 Art. Lebedev Studio (http://www.artlebedev.com) |
| Author: Alexandr Petrosian <paf@design.ru> (http://paf.design.ru) | |
| */ | */ |
| #include "classes.h" | |
| #include "pa_vmethod_frame.h" | |
| #include "pa_common.h" | |
| #include "pa_request.h" | #include "pa_request.h" |
| #include "_table.h" | #include "pa_charsets.h" |
| #include "pa_vtable.h" | #include "pa_vtable.h" |
| #include "pa_common.h" | |
| #include "pa_vint.h" | #include "pa_vint.h" |
| #include "pa_sql_connection.h" | |
| #include "pa_vbool.h" | |
| #include "pa_array.h" | |
| #if (!defined(NO_STRINGSTREAM) && !defined(FREEBSD4) && !defined(PA_DEBUG_DISABLE_GC)) | |
| #include <sstream> | |
| #define USE_STRINGSTREAM | |
| #endif | |
| volatile const char * IDENT_TABLE_C="$Id$"; | |
| // global var | // class |
| VClass *table_class; | class MTable: public Methoded { |
| public: // VStateless_class | |
| Value* create_new_value(Pool&) { return new VTable(); } | |
| public: | |
| MTable(); | |
| }; | |
| // global variable | |
| DECLARE_CLASS_VAR(table, new MTable); | |
| // globals | |
| #define TABLE_REVERSE_NAME "reverse" | |
| String table_reverse_name(TABLE_REVERSE_NAME); | |
| // methods | // methods |
| static Table::Action_options get_action_options(Request& r, MethodParams& params, size_t options_index, const Table& source) { | |
| Table::Action_options result; | |
| if(params.count() <= options_index) | |
| return result; | |
| HashStringValue* options=params.as_hash(options_index); | |
| 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(*voffset).as_int(); | |
| } | |
| if(Value* vlimit=options->get(sql_limit_name)) { | |
| valid_options++; | |
| result.limit=r.process(*vlimit).as_int(); | |
| } | |
| if(Value *vreverse=(Value *)options->get(table_reverse_name)) { | |
| valid_options++; | |
| result.reverse=r.process(*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; | |
| } | |
| struct TableControlChars { | |
| char separator; const String* sseparator; | |
| char encloser; const String* sencloser; | |
| char separators[3]; | |
| TableControlChars(): | |
| separator('\t'), sseparator(new String("\t")), | |
| encloser(0), sencloser(0) | |
| { | |
| strcpy(separators,"\t\n"); | |
| } | |
| int load( HashStringValue& options ) { | |
| int result=0; | |
| if(Value* vseparator=options.get(PA_COLUMN_SEPARATOR_NAME)) { | |
| sseparator=&vseparator->as_string(); | |
| if(sseparator->length()!=1) | |
| throw Exception(PARSER_RUNTIME, sseparator, "separator must be one byte character"); | |
| separator=sseparator->first_char(); | |
| separators[0]=separator; | |
| result++; | |
| } | |
| if(Value* vencloser=options.get(PA_COLUMN_ENCLOSER_NAME)) { | |
| sencloser=&vencloser->as_string(); | |
| if(sencloser->is_empty()){ | |
| encloser=0; | |
| } else { | |
| if(sencloser->length()!=1) | |
| throw Exception(PARSER_RUNTIME, sencloser, "encloser must be empty or one byte character"); | |
| encloser=sencloser->first_char(); | |
| } | |
| result++; | |
| } | |
| return result; | |
| } | |
| }; | |
| struct lsplit_sresult { | |
| String* piece; | |
| char delim; | |
| lsplit_sresult() : piece(0), delim(0){} | |
| operator bool() { return piece!=0; } | |
| void append(String *str){ | |
| if(piece) | |
| *piece << *str; | |
| else | |
| piece = str; | |
| } | |
| }; | |
| class StringSplitHelper : public String { | |
| public: | |
| char* base; | |
| StringSplitHelper(String astring) : String(astring), base(cstrm()) {} | |
| bool check_lang(const char *pos){ | |
| return langs.check_lang(L_AS_IS, pos-base, 1); | |
| } | |
| String *extract(char *pos){ | |
| String *result=new String; | |
| if(size_t len=strlen(pos)){ | |
| // first: their langs | |
| result->langs.append(result->body, langs, pos-base, len); | |
| // next: letters themselves | |
| result->body=Body(pos); | |
| } | |
| return result; | |
| } | |
| }; | |
| inline lsplit_sresult lsplit(char* *string_ref, const char* delims, StringSplitHelper& helper) { | |
| lsplit_sresult result; | |
| if(char *pos=*string_ref) { | |
| while(pos=strpbrk(pos, delims)) { | |
| if(helper.check_lang(pos)){ | |
| result.delim=*pos; | |
| *pos=0; | |
| result.piece=helper.extract(*string_ref); | |
| *string_ref=pos+1; | |
| return result; | |
| } | |
| pos++; | |
| } | |
| result.piece=helper.extract(*string_ref); | |
| *string_ref=0; | |
| } | |
| return result; | |
| } | |
| static lsplit_sresult lsplit(char** string_ref, const char* delims, char encloser, StringSplitHelper& helper) { | |
| lsplit_sresult result; | |
| if(char *pos=*string_ref) { | |
| if(encloser && *pos==encloser && helper.check_lang(pos)) { | |
| *string_ref=++pos; | |
| // we are enclosed, searching for second encloser | |
| while(1) { | |
| if(pos=strchr(pos, encloser)){ | |
| if(helper.check_lang(pos)){ | |
| *(pos++)=0; | |
| result.append(helper.extract(*string_ref)); | |
| if(*pos==encloser && helper.check_lang(pos)){ // double-encloser stands for encloser | |
| *string_ref=pos; | |
| } else { | |
| *string_ref=pos; | |
| break; | |
| } | |
| } | |
| pos++; | |
| } else { | |
| result.append(helper.extract(*string_ref)); | |
| *string_ref=0; | |
| return result; | |
| } | |
| } | |
| // we are no longer enclosed, searching for delimiter | |
| while(pos=strpbrk(pos, delims)) { | |
| if(helper.check_lang(pos)){ | |
| result.delim=*pos; | |
| if(pos>*string_ref){ | |
| *pos=0; | |
| result.append(helper.extract(*string_ref)); | |
| } | |
| *string_ref=pos+1; | |
| return result; | |
| } | |
| pos++; | |
| } | |
| result.append(helper.extract(*string_ref)); | |
| *string_ref=0; | |
| } else | |
| return lsplit(string_ref, delims, helper); | |
| } | |
| return result; | |
| } | |
| static void skip_clean_empty_lines(char** data_ref, StringSplitHelper& helper) { | |
| if(*data_ref) { | |
| while(**data_ref == '\n' && helper.check_lang(*data_ref)) | |
| (*data_ref)++; | |
| } | |
| } | |
| // TODO: проверить ^set в ^menu & co | static void _create(Request& r, MethodParams& params) { |
| // clone/copy part? | |
| if(Table *source=params[0].get_table()) { | |
| Table::Action_options o=get_action_options(r, params, 1, *source); | |
| if(params.count()>2) | |
| throw Exception(PARSER_RUNTIME, 0, "too many parameters"); | |
| GET_SELF(r, VTable).set_table(*new Table(*source, o)); | |
| return; | |
| } | |
| static void set_or_load( | size_t data_param_index=0; |
| Request& r, | bool nameless=false; |
| const String& method_name, Array *params, | |
| bool is_load) { | if(params.count()>1) { |
| Pool& pool=r.pool(); | if(params[0].is_string()){ // can be nameless only |
| // data is last parameter | const String& snameless=params.as_string(0, "called with more then 1 param, first param may be only string 'nameless' or junction"); |
| Value *vdata=static_cast<Value *>(params->get(params->size()-1)); | if(snameless!="nameless") |
| // forcing | throw Exception(PARSER_RUNTIME, &snameless, "table::create called with more then 1 param, first param may be only 'nameless'"); |
| // [this param type] | nameless=true; |
| // [this param type] | data_param_index++; |
| r.fail_if_junction_(true, *vdata, | } |
| method_name, "body must not be a junction"); | } |
| HashStringValue *options=0; | |
| TableControlChars control_chars; | |
| size_t options_param_index=data_param_index+1; | |
| if( options_param_index<params.count() && (options=params.as_hash(options_param_index)) ) { | |
| if(control_chars.load(*options)!=options->count()) | |
| throw Exception(PARSER_RUNTIME, 0, CALLED_WITH_INVALID_OPTION); | |
| } | |
| // data or file_name | |
| char *data_or_filename=vdata->as_string().cstr(); | |
| // data | // data |
| char *data=is_load?file_read(pool, r.absolute(data_or_filename)):data_or_filename; | StringSplitHelper sdata(r.process_to_string(params.as_junction(data_param_index, "body must be table or code"))); |
| char *data=sdata.base; | |
| // parse columns | |
| Table::columns_type columns; | |
| if(nameless) { | |
| columns=0; // nameless | |
| } else { | |
| columns=new ArrayString; | |
| while( lsplit_sresult sr=lsplit(&data, control_chars.separators, control_chars.encloser, sdata) ) { | |
| *columns+=sr.piece; | |
| if(sr.delim=='\n') | |
| break; | |
| } | |
| } | |
| Table& table=*new Table(columns); | |
| int columns_count=columns ? columns->count(): 0; | |
| // parse cells | |
| Table::element_type row(new ArrayString(columns_count)); | |
| skip_clean_empty_lines(&data, sdata); | |
| while( lsplit_sresult sr=lsplit(&data, control_chars.separators, control_chars.encloser, sdata) ) { | |
| if(sr.piece->is_empty() && !sr.delim && !row->count()) // append last empty column [if without \n] | |
| break; | |
| *row+=sr.piece; | |
| if(sr.delim=='\n') { | |
| table+=row; | |
| row=new ArrayString(columns_count); | |
| skip_clean_empty_lines(&data, sdata); | |
| } | |
| } | |
| // last line [if without \n] | |
| if(row->count()) | |
| table+=row; | |
| // replace any previous table value | |
| GET_SELF(r, VTable).set_table(table); | |
| } | |
| struct lsplit_result { | |
| char* piece; | |
| char delim; | |
| lsplit_result(char *apiece=0) : piece(apiece), delim(0){} | |
| operator bool() { return piece!=0; } | |
| }; | |
| inline lsplit_result lsplit(char* *string_ref, const char* delims) { | |
| lsplit_result result(*string_ref); | |
| if(result.piece) { | |
| if(char* v=strpbrk(result.piece, delims)) { | |
| result.delim=*v; | |
| *v=0; | |
| *string_ref=v+1; | |
| return result; | |
| } | |
| *string_ref=0; | |
| } | |
| return result; | |
| } | |
| static lsplit_result lsplit(char** string_ref, const char* delims, char encloser) { | |
| lsplit_result result(*string_ref); | |
| if(result.piece) { | |
| if(encloser && *result.piece==encloser) { | |
| result.piece++; | |
| char c; | |
| char *read; | |
| char *write; | |
| write=read=result.piece; | |
| // we are enclosed, searching for second encloser | |
| while(c=*read++) { | |
| if(c==encloser) { | |
| if(*read==encloser) // double-encloser stands for encloser | |
| read++; | |
| else | |
| break; // note: skipping encloser | |
| } | |
| *write++=c; | |
| } | |
| // we are no longer enclosed, searching for delimiter | |
| while(c=*read++) { | |
| if(c==delims[0] || c==delims[1]) { | |
| result.delim=c; | |
| break; | |
| } else | |
| *write++=c; | |
| } | |
| *write=0; // terminate | |
| *string_ref=c ? read : 0; | |
| return result; | |
| } else | |
| return lsplit(string_ref, delims); | |
| } | |
| return result; | |
| } | |
| static void skip_empty_and_comment_lines( char** data_ref ) { | |
| while(*data_ref) { | |
| if(**data_ref == '\n'){ | |
| (*data_ref)++; | |
| } else { | |
| if(**data_ref == '#' ) | |
| /*nowhere=*/getrow(data_ref); | |
| else | |
| break; | |
| } | |
| } | |
| } | |
| static void skip_empty_lines( char** data_ref ) { | |
| if(*data_ref) { | |
| while(**data_ref == '\n') | |
| (*data_ref)++; | |
| } | |
| } | |
| typedef void (*Skip_lines_action)(char** data_ref); | |
| static void _load(Request& r, MethodParams& params) { | |
| const String& first_param=params.as_string(0, FILE_NAME_MUST_BE_STRING); | |
| int filename_param_index=0; | |
| bool nameless=first_param=="nameless"; | |
| if(nameless) | |
| filename_param_index++; | |
| size_t options_param_index=filename_param_index+1; | |
| HashStringValue *options=0; | |
| TableControlChars control_chars; | |
| if(options_param_index<params.count() | |
| && (options=params.as_hash(options_param_index))) { | |
| // cloning, so that we could change [to simplify checks on params inside file_read_text | |
| options=new HashStringValue(*options); | |
| control_chars.load(*options); | |
| } | |
| // loading text | |
| char *data=file_load_text(r, r.absolute(params.as_string(filename_param_index, FILE_NAME_MUST_BE_STRING)), true, options); | |
| Skip_lines_action skip_lines_action = (control_chars.separator=='#' || control_chars.encloser=='#') ? skip_empty_lines : skip_empty_and_comment_lines; | |
| // parse columns | // parse columns |
| Array *columns; | Table::columns_type columns; |
| #ifndef NO_STRING_ORIGIN | if(nameless) { |
| const Origin& origin=method_name.origin(); | columns=0; // nameless |
| const char *file=origin.file; | } else { |
| uint line=origin.line; | columns=new ArrayString; |
| #endif | |
| if(params->size()==2) { | skip_lines_action(&data); |
| columns=0; | while( lsplit_result sr=lsplit(&data, control_chars.separators, control_chars.encloser) ) { |
| } else { | *columns+=new String(sr.piece, String::L_TAINTED); |
| columns=new(pool) Array(pool); | if(sr.delim=='\n') |
| break; | |
| if(char *row_chars=getrow(&data)) | } |
| do { | |
| String *name=new(pool) String(pool); | |
| name->APPEND(lsplit(&row_chars, '\t'), 0, file, line++); | |
| *columns+=name; | |
| } while(row_chars); | |
| } | } |
| Table& table=*new Table(columns); | |
| int columns_count=columns ? columns->count(): 0; | |
| // parse cells | // parse cells |
| Table& table=*new(pool) Table(pool, method_name, columns); | Table::element_type row(new ArrayString(columns_count)); |
| char *row_chars; | skip_lines_action(&data); |
| while(row_chars=getrow(&data)) { | while( lsplit_result sr=lsplit(&data, control_chars.separators, control_chars.encloser) ) { |
| Array *row=new(pool) Array(pool); | if(!*sr.piece && !sr.delim && !row->count()) // append last empty column [if without \n] |
| while(char *cell_chars=lsplit(&row_chars, '\t')) { | break; |
| String *cell=new(pool) String(pool); | *row+=new String(sr.piece, String::L_TAINTED); |
| cell->APPEND(cell_chars, 0, file, line); | if(sr.delim=='\n') { |
| *row+=cell; | table+=row; |
| row=new ArrayString(columns_count); | |
| skip_lines_action(&data); | |
| } | } |
| line++; | } |
| // last line [if without \n] | |
| if(row->count()) | |
| table+=row; | table+=row; |
| }; | |
| // replace any previous table value | |
| GET_SELF(r, VTable).set_table(table); | |
| } | |
| #ifdef USE_STRINGSTREAM | |
| #include "../lib/gc/include/gc_allocator.h" | |
| typedef std::basic_stringstream<char, std::char_traits<char>, gc_allocator<char> > pa_stringstream; | |
| typedef std::basic_string<char, std::char_traits<char>, gc_allocator<char> > pa_string; | |
| static void enclose( pa_stringstream& to, const String* from, char encloser ) { | |
| if(from){ | |
| to<<encloser; | |
| // while we have 'encloser'... | |
| size_t pos_after=0; | |
| for( size_t pos_before; (pos_before=from->pos( encloser, pos_after ))!=STRING_NOT_FOUND; pos_after=pos_before) { | |
| pos_before++; // including first encloser (and skipping it for next pos) | |
| to<<from->mid(pos_after, pos_before).cstr(); | |
| to<<encloser; // doubling encloser | |
| } | |
| // last piece | |
| size_t from_length=from->length(); | |
| if(pos_after<from_length) | |
| to<<from->mid(pos_after, from_length).cstr(); | |
| to<<encloser; | |
| } else { | |
| to<<encloser<<encloser; | |
| } | |
| } | |
| static void table_to_csv(pa_stringstream& result, Table& table, TableControlChars& control_chars, bool output_column_names) { | |
| if(output_column_names) { | |
| if(table.columns()) { // named table | |
| if(control_chars.encloser){ | |
| for(Array_iterator<const String*> i(*table.columns()); i.has_next(); ) { | |
| enclose( result, i.next(), control_chars.encloser ); | |
| if(i.has_next()) | |
| result<<control_chars.separator; | |
| } | |
| } else { | |
| for(Array_iterator<const String*> i(*table.columns()); i.has_next(); ) { | |
| result<<i.next()->cstr(); | |
| if(i.has_next()) | |
| result<<control_chars.separator; | |
| } | |
| } | |
| } else { // nameless table [we were asked to output column names] | |
| if(int lsize=table.count()?table[0]->count():0) | |
| for(int column=0; column<lsize; column++) { | |
| if(control_chars.encloser) { | |
| result<<control_chars.encloser<<column<<control_chars.encloser; | |
| } else { | |
| result<<column; | |
| } | |
| if(column<lsize-1){ | |
| result<<control_chars.separator; | |
| } | |
| } | |
| else | |
| result<<"empty nameless table"; | |
| } | |
| result<<'\n'; | |
| } | |
| // process data lines | |
| Array_iterator<ArrayString*> i(table); | |
| if(control_chars.encloser){ | |
| while(i.has_next()) { | |
| for(Array_iterator<const String*> c(*i.next()); c.has_next(); ) { | |
| enclose( result, c.next(), control_chars.encloser ); | |
| if(c.has_next()) | |
| result<<control_chars.separator; | |
| } | |
| result<<'\n'; | |
| } | |
| } else { | |
| while(i.has_next()) { | |
| for(Array_iterator<const String*> c(*i.next()); c.has_next(); ) { | |
| result<<c.next()->cstr(); | |
| if(c.has_next()) | |
| result<<control_chars.separator; | |
| } | |
| result<<'\n'; | |
| } | |
| } | |
| } | |
| #else | |
| void enclose( String& to, const String* from, char encloser, const String* sencloser ) { | |
| if(from){ | |
| to<<*sencloser; | |
| // while we have 'encloser'... | |
| size_t pos_after=0; | |
| for( size_t pos_before; (pos_before=from->pos( encloser, pos_after ))!=STRING_NOT_FOUND; pos_after=pos_before) { | |
| pos_before++; // including first encloser (and skipping it for next pos) | |
| to<<from->mid(pos_after, pos_before); | |
| to<<*sencloser; // doubling encloser | |
| } | |
| // last piece | |
| size_t from_length=from->length(); | |
| if(pos_after<from_length) | |
| to<<from->mid(pos_after, from_length); | |
| to<<*sencloser; | |
| } else { | |
| to<<*sencloser<<*sencloser; | |
| } | |
| } | |
| static void table_to_csv(String& result, Table& table, TableControlChars& control_chars, bool output_column_names) { | |
| if(output_column_names) { | |
| if(table.columns()) { // named table | |
| if(control_chars.encloser) { | |
| for(Array_iterator<const String*> i(*table.columns()); i.has_next(); ) { | |
| enclose( result, i.next(), control_chars.encloser, control_chars.sencloser ); | |
| if(i.has_next()) | |
| result<<*control_chars.sseparator; | |
| } | |
| } else { | |
| for(Array_iterator<const String*> i(*table.columns()); i.has_next(); ) { | |
| result<<*i.next(); | |
| if(i.has_next()) | |
| result<<*control_chars.sseparator; | |
| } | |
| } | |
| } else { // nameless table [we were asked to output column names] | |
| if(int lsize=table.count()?table[0]->count():0) | |
| for(int column=0; column<lsize; column++) { | |
| if(control_chars.encloser) { | |
| result<<*control_chars.sencloser<<String::Body::Format(column)<<*control_chars.sencloser; | |
| } else { | |
| result<<String::Body::Format(column); | |
| } | |
| if(column<lsize-1){ | |
| result<<*control_chars.sseparator; | |
| } | |
| } | |
| else | |
| result.append_help_length("empty nameless table", 0, String::L_CLEAN); | |
| } | |
| result.append_know_length("\n", 1, String::L_CLEAN); | |
| } | |
| // data lines | |
| Array_iterator<ArrayString*> i(table); | |
| if(control_chars.encloser){ | |
| while(i.has_next()) { | |
| for(Array_iterator<const String*> c(*i.next()); c.has_next(); ) { | |
| enclose( result, c.next(), control_chars.encloser, control_chars.sencloser ); | |
| if(c.has_next()) | |
| result<<*control_chars.sseparator; | |
| } | |
| result.append_know_length("\n", 1, String::L_CLEAN); | |
| } | |
| } else { | |
| while(i.has_next()) { | |
| for(Array_iterator<const String*> c(*i.next()); c.has_next(); ) { | |
| result<<*c.next(); | |
| if(c.has_next()) | |
| result<<*control_chars.sseparator; | |
| } | |
| result.append_know_length("\n", 1, String::L_CLEAN); | |
| } | |
| } | |
| } | |
| #endif // don't use stringstream | |
| static void _save(Request& r, MethodParams& params) { | |
| const String& first_arg=params.as_string(0, FIRST_ARG_MUST_NOT_BE_CODE); | |
| size_t param_index=1; | |
| bool do_append=false; | |
| bool output_column_names=true; | |
| // mode? | |
| if(first_arg=="append") | |
| do_append=true; | |
| else if(first_arg=="nameless") | |
| output_column_names=false; | |
| else | |
| --param_index; | |
| const String& file_name=params.as_string(param_index++, FILE_NAME_MUST_NOT_BE_CODE); | |
| String file_spec=r.absolute(file_name); | |
| if(do_append && file_exist(file_spec)) | |
| output_column_names=false; | |
| TableControlChars control_chars; | |
| if(param_index<params.count()) | |
| if(HashStringValue* options=params.as_hash(param_index++)) { | |
| int valid_options=control_chars.load(*options); | |
| if(valid_options!=options->count()) | |
| throw Exception(PARSER_RUNTIME, 0, CALLED_WITH_INVALID_OPTION); | |
| } | |
| if(param_index<params.count()) | |
| throw Exception(PARSER_RUNTIME, 0, "bad mode (must be nameless or append)"); | |
| Table& table=GET_SELF(r, VTable).table(); | |
| #ifdef USE_STRINGSTREAM | |
| pa_stringstream ost(std::stringstream::out); | |
| table_to_csv(ost, table, control_chars, output_column_names); | |
| // write | |
| pa_string data=ost.str(); | |
| const char* data_cstr=data.c_str(); | |
| file_write(r.charsets, file_spec, data_cstr, data.length(), true /* as text */, do_append); | |
| #else | |
| String sdata; | |
| table_to_csv(sdata, table, control_chars, output_column_names); | |
| // write | |
| const char* data_cstr=sdata.cstr(); | |
| file_write(r.charsets, file_spec, data_cstr, sdata.length(), true /* as text */, do_append); | |
| if(*data_cstr) // not empty (when empty it's not heap memory) | |
| pa_free((void*)data_cstr); // not needed anymore | |
| #endif | |
| } | |
| static void _csv_string(Request& r, MethodParams& params) { | |
| bool output_column_names=true; | |
| size_t param_index=0; | |
| if(params.count()>0 && params[0].is_string()) { | |
| if(params.as_string(0, FIRST_ARG_MUST_NOT_BE_CODE)=="nameless") { | |
| output_column_names=false; | |
| param_index++; | |
| } else { | |
| throw Exception(PARSER_RUNTIME, 0, "bad mode (must be nameless)"); | |
| } | |
| } | |
| TableControlChars control_chars; | |
| if(param_index<params.count()) | |
| if(HashStringValue* options=params.as_hash(param_index++)) { | |
| int valid_options=control_chars.load(*options); | |
| if(valid_options!=options->count()) | |
| throw Exception(PARSER_RUNTIME, 0, CALLED_WITH_INVALID_OPTION); | |
| } | |
| Table& table=GET_SELF(r, VTable).table(); | |
| #ifdef USE_STRINGSTREAM | |
| pa_stringstream ost(std::stringstream::out); | |
| table_to_csv(ost, table, control_chars, output_column_names); | |
| r.write(*new VString(*new String(pa_strdup(ost.str().c_str()), String::L_CLEAN))); | |
| #else | |
| String sdata; | |
| table_to_csv(sdata, table, control_chars, output_column_names); | |
| r.write(*new VString(*new String(sdata.cstr(), String::L_CLEAN))); | |
| #endif | |
| } | |
| static void _count(Request& r, MethodParams& params) { | |
| Table& table=GET_SELF(r, VTable).table(); | |
| size_t result=0; | |
| if(params.count()) { | |
| const String& param=params.as_string(0, PARAMETER_MUST_BE_STRING); | |
| if(param == "columns") | |
| result = table.columns() ? table.columns()->count() : table.max_cells(); | |
| else if(param == "cells") | |
| result = table.count() ? table[table.current()]->count() : 0; | |
| else if(param == "rows") // synonim for ^table.count[] | |
| result = table.count(); | |
| else | |
| throw Exception(PARSER_RUNTIME, ¶m, "parameter must be 'columns', 'cells' and 'rows' only"); | |
| } else | |
| result = table.count(); | |
| r.write(*new VInt(result)); | |
| } | |
| static void _line(Request& r, MethodParams&) { | |
| int result=1+GET_SELF(r, VTable).table().current(); | |
| r.write(*new VInt(result)); | |
| } | |
| static void _offset(Request& r, MethodParams& params) { | |
| Table& table=GET_SELF(r, VTable).table(); | |
| if(params.count()) { | |
| bool absolute=false; | |
| if(params.count()>1) { | |
| const String& whence=params.as_string(0, "whence must be string"); | |
| if(whence=="cur") | |
| absolute=false; | |
| else if(whence=="set") | |
| absolute=true; | |
| else | |
| throw Exception(PARSER_RUNTIME, &whence, "is invalid whence, valid are 'cur' or 'set'"); | |
| } | |
| int offset=params.as_int(params.count()-1, "offset must be expression", r); | |
| table.offset(absolute, offset); | |
| } else | |
| r.write(*new VInt(table.current())); | |
| } | |
| static void _menu(Request& r, MethodParams& params) { | |
| InCycle temp(r); | |
| Value& body_code=params.as_junction(0, "body must be code"); | |
| Value* delim_maybe_code=params.count()>1?¶ms[1]:0; | |
| Table& table=GET_SELF(r, VTable).table(); | |
| size_t saved_current=table.current(); | |
| if(delim_maybe_code) { // delimiter set | |
| bool need_delim=false; | |
| for(size_t row=0; row<table.count(); row++) { | |
| table.set_current(row); | |
| Value& sv_processed=r.process(body_code); | |
| TempSkip4Delimiter skip(r); | |
| const String* s_processed=sv_processed.get_string(); | |
| if(s_processed && !s_processed->is_empty()) { // we have body | |
| if(need_delim) // need delim & iteration produced string? | |
| r.write(r.process(*delim_maybe_code)); | |
| else | |
| need_delim=true; | |
| } | |
| r.write(sv_processed); | |
| if(skip.check_break()) | |
| break; | |
| } | |
| } else { | |
| for(size_t row=0; row<table.count(); row++) { | |
| table.set_current(row); | |
| r.process_write(body_code); | |
| if(r.check_skip_break()) | |
| break; | |
| } | |
| } | |
| table.set_current(saved_current); | |
| } | |
| #ifndef DOXYGEN | |
| struct Row_info { | |
| Request *r; | |
| Table *table; | |
| Value* key_code; | |
| size_t key_field; | |
| Array<int>* value_fields; | |
| Value* value_code; | |
| HashStringValue* hash; | |
| Table2hash_distint distinct; | |
| size_t row; | |
| Table2hash_value_type value_type; | |
| }; | |
| #endif | |
| static void table_row_to_hash(Table::element_type row, Row_info *info) { | |
| const String* key; | |
| if(info->key_code) { | |
| info->table->set_current(info->row++); // change context row | |
| Value& sv_processed=info->r->process(*info->key_code); | |
| key=&sv_processed.as_string(); | |
| } else { | |
| key=info->key_field<row->count()?row->get(info->key_field):0; | |
| } | |
| if(!key) | |
| return; // ignore rows without key [too-short-record_array if-indexed] | |
| bool exist=false; | |
| switch(info->value_type) { | |
| case C_STRING: { | |
| if(info->value_fields->count()){ | |
| size_t index=info->value_fields->get(0); | |
| exist=info->hash->put_dont_replace(*key, (index < row->count()) ? new VString(*row->get(index)) : VString::empty()); | |
| } else { | |
| exist=info->hash->put_dont_replace(*key, VString::empty()); | |
| } | |
| break; | |
| } | |
| case C_HASH: { | |
| VHash* vhash=new VHash; | |
| HashStringValue& hash=vhash->hash(); | |
| for(Array_iterator<int> i(*info->value_fields); i.has_next(); ) { | |
| size_t value_field=i.next(); | |
| if(value_field<row->count()) | |
| hash.put(*info->table->columns()->get(value_field), new VString(*row->get(value_field))); | |
| } | |
| exist=info->hash->put_dont_replace(*key, vhash); | |
| break; | |
| } | |
| case C_TABLE: { | |
| VTable* vtable=(VTable*)info->hash->get(*key); // table exist? | |
| Table* table; | |
| if(vtable) { | |
| if(info->distinct==D_ILLEGAL) { | |
| exist=true; | |
| break; | |
| } | |
| 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::element_type row_copy(new ArrayString(row->count())); | |
| row_copy->append(*row); | |
| *table+=row_copy; | |
| break; | |
| } | |
| case C_CODE: { | |
| if(!info->key_code) | |
| info->table->set_current(info->row++); // change context row | |
| exist=info->hash->put_dont_replace(*key, &info->r->process(*info->value_code)); | |
| break; | |
| } | |
| } | |
| if(exist && info->distinct==D_ILLEGAL) | |
| throw Exception(PARSER_RUNTIME, key, "duplicate key"); | |
| } | |
| Table2hash_value_type get_value_type(Value& vvalue_type){ | |
| if(vvalue_type.is_string()) { | |
| const String& svalue_type=*vvalue_type.get_string(); | |
| if(svalue_type == "table"){ | |
| return C_TABLE; | |
| } else if (svalue_type == "string") { | |
| return C_STRING; | |
| } else if (svalue_type == "hash") { | |
| return C_HASH; | |
| } else { | |
| throw Exception(PARSER_RUNTIME, &svalue_type, "must be 'hash', 'table' or 'string'"); | |
| } | |
| } else { | |
| throw Exception(PARSER_RUNTIME, 0, "'type' must be string"); | |
| } | |
| } | |
| static Table2hash_distint get_distinct(Value& vdistinct, Table2hash_value_type& value_type){ | |
| if(vdistinct.is_string()) { | |
| const String& sdistinct=*vdistinct.get_string(); | |
| if(sdistinct!="tables") | |
| throw Exception(PARSER_RUNTIME, &sdistinct, "must be 'tables' or true/false"); | |
| value_type=C_TABLE; | |
| return D_FIRST; | |
| } | |
| return vdistinct.as_bool() ? D_FIRST : D_ILLEGAL; | |
| } | |
| 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) { | |
| Table2hash_distint distinct=D_ILLEGAL; | |
| Table2hash_value_type value_type=C_HASH; | |
| int param_index=params.count()-1; | |
| if(param_index>0) { | |
| if(params[1].get_junction()) | |
| value_type=C_CODE; | |
| if(HashStringValue* options=params[param_index].get_hash()){ // can't use .as_hash because the 2nd param could be table so .as_hash throws an error | |
| --param_index; | |
| int valid_options=0; | |
| if(Value* vdistinct_code=options->get(sql_distinct_name)) { // $.distinct ? | |
| valid_options++; | |
| distinct=get_distinct(r.process(*vdistinct_code), value_type); | |
| } | |
| if(Value* vvalue_type_code=options->get(sql_value_type_name)) { // $.type ? | |
| if(value_type==C_TABLE) // $.distinct[tables] already was specified | |
| throw Exception(PARSER_RUNTIME, 0, "you can't specify $.distinct[tables] and $.type[] together"); | |
| if(value_type==C_CODE) | |
| throw Exception(PARSER_RUNTIME, 0, "you can't specify $.type[] if value is code"); | |
| valid_options++; | |
| value_type=get_value_type(r.process(*vvalue_type_code)); | |
| } | |
| if(valid_options!=options->count()) | |
| throw Exception(PARSER_RUNTIME, 0, CALLED_WITH_INVALID_OPTION); | |
| } | |
| } | |
| if(param_index==2) // options were specified but not as hash | |
| throw Exception(PARSER_RUNTIME, 0, "options must be hash"); | |
| Array<int> value_fields; | |
| Value* value_code=0; | |
| if(param_index==0){ // list of columns wasn't specified | |
| if(value_type==C_STRING) // $.type[string] | |
| throw Exception(PARSER_RUNTIME, 0, "you must specify one value field with option $.type[string]"); | |
| for(size_t i=0; i<columns->count(); i++) // by all columns, including key | |
| value_fields+=i; | |
| } else { // list of columns or code was specified | |
| if(value_type==C_TABLE) | |
| throw Exception(PARSER_RUNTIME, 0, "you can't specify value field(s) with option $.distinct[tables] or $.type[tables]"); | |
| Value& value_fields_param=params[1]; | |
| if(value_fields_param.get_junction()){ // code specified | |
| value_code=&value_fields_param; | |
| } else if(value_fields_param.is_string()) { // one column as string was specified | |
| const String &field_name=*value_fields_param.get_string(); | |
| if(!field_name.is_empty()) | |
| value_fields+=self_table.column_name2index(field_name, true); | |
| } else if(Table* value_fields_table=value_fields_param.get_table()) { // list of columns were specified in table | |
| for(Array_iterator<Table::element_type> i(*value_fields_table); i.has_next(); ) { | |
| const String& value_field_name =*i.next()->get(0); | |
| value_fields +=self_table.column_name2index(value_field_name, true); | |
| } | |
| } else | |
| throw Exception(PARSER_RUNTIME, 0, "value field(s) must be string or table or code"); | |
| } | |
| if(value_type==C_STRING && value_fields.count()>1) | |
| throw Exception(PARSER_RUNTIME, 0, "you can't specify more then one value field with option $.type[string]"); | |
| { | |
| Value* key_param=¶ms[0]; | |
| Row_info info={ | |
| &r, | |
| &self_table, | |
| /*key_code=*/key_param->get_junction() ? key_param : 0, | |
| /*key_field=*/0/*filled below*/, | |
| &value_fields, | |
| value_code, | |
| &result.hash(), | |
| distinct, | |
| /*row=*/0, | |
| value_type | |
| }; | |
| info.key_field=(info.key_code ? -1 : self_table.column_name2index(key_param->as_string(), true)); | |
| int saved_current=self_table.current(); | |
| self_table.for_each(table_row_to_hash, &info); | |
| self_table.set_current(saved_current); | |
| result.extract_default(); | |
| } | |
| } | |
| } | |
| r.write(result); | |
| } | |
| #ifndef DOXYGEN | |
| struct Table_seq_item : public PA_Allocated { | |
| ArrayString* row; | |
| union { | |
| const char *c_str; | |
| double d; | |
| } value; | |
| }; | |
| #endif | |
| static int sort_cmp_string(const void *a, const void *b) { | |
| return strcmp( | |
| static_cast<const Table_seq_item *>(a)->value.c_str, | |
| static_cast<const Table_seq_item *>(b)->value.c_str | |
| ); | |
| } | |
| static int sort_cmp_double(const void *a, const void *b) { | |
| double va=static_cast<const Table_seq_item *>(a)->value.d; | |
| double vb=static_cast<const Table_seq_item *>(b)->value.d; | |
| if(va<vb) | |
| return -1; | |
| else if(va>vb) | |
| return +1; | |
| else | |
| return 0; | |
| } | |
| static void _sort(Request& r, MethodParams& params) { | |
| Value& key_maker=params.as_junction(0, "key-maker must be code"); | |
| bool reverse=params.count()>1 /*..[desc|asc|]*/ && params.as_no_junction(1, "order must not be code").as_string()=="desc"; // default=asc | |
| Table& old_table=GET_SELF(r, VTable).table(); | |
| Table& new_table=*new Table(old_table.columns()); | |
| Table_seq_item* seq=new Table_seq_item[old_table.count()]; | |
| int i; | |
| // calculate key values | |
| bool key_values_are_strings=true; | |
| int old_count=old_table.count(); | |
| for(i=0; i<old_count; i++) { | |
| old_table.set_current(i); | |
| // calculate key value | |
| seq[i].row=old_table[i]; | |
| Value& value=r.process(key_maker); | |
| if(i==0) // determining key values type by first one | |
| key_values_are_strings=value.is_string(); | |
| if(key_values_are_strings) | |
| seq[i].value.c_str=value.as_string().cstr(); | |
| else | |
| seq[i].value.d=value.as_expr_result().as_double(); | |
| } | |
| // @todo: handle this elsewhere | |
| if(r.charsets.source().NAME()=="KOI8-R" && key_values_are_strings) { | |
| for(i=0; i<old_count; i++) | |
| if(*seq[i].value.c_str) | |
| seq[i].value.c_str=Charset::transcode(seq[i].value.c_str, r.charsets.source(), pa_UTF8_charset).cstr(); | |
| } | |
| // sort keys | |
| qsort(seq, old_count, sizeof(Table_seq_item), key_values_are_strings?sort_cmp_string:sort_cmp_double); | |
| // reorder table as they require in 'seq' | |
| for(i=0; i<old_count; i++) | |
| new_table+=Table::element_type(seq[reverse?old_count-1-i:i].row); | |
| delete[] seq; | |
| // replace any previous table value | // replace any previous table value |
| r.self->as_vtable().set_table(table); | GET_SELF(r, VTable).set_table(new_table); |
| } | } |
| #ifndef DOXYGEN | |
| struct Expression_is_true_info { | |
| Request* r; | |
| Value* expression_code; | |
| }; | |
| #endif | |
| static void _set(Request& r, const String& method_name, Array *params) { | static bool expression_is_true(Table&, Expression_is_true_info* info) { |
| set_or_load(r, method_name, params, false); | return info->r->process(*info->expression_code).as_bool(); |
| } | } |
| static void _load(Request& r, const String& method_name, Array *params) { | static bool _locate_expression(Table& table, Request& r, MethodParams& params) { |
| set_or_load(r, method_name, params, true); | Value& expression_code=params.as_junction(0, "must be expression"); |
| Table::Action_options o=get_action_options(r, params, 1, table); | |
| if(params.count()>2) | |
| throw Exception(PARSER_RUNTIME, 0, "locate by expression only has parameters: expression and, maybe, options"); | |
| Expression_is_true_info info={&r, &expression_code}; | |
| return table.table_first_that(expression_is_true, &info, o); | |
| } | } |
| static void _count(Request& r, const String&, Array *) { | static bool _locate_name_value(Table& table, Request& r, MethodParams& params) { |
| Pool& pool=r.pool(); | const String& name=params.as_string(0, "column name must be string"); |
| Value& value=*new(pool) VInt(pool, r.self->as_vtable().table().size()); | const String& value=params.as_string(1, VALUE_MUST_BE_STRING); |
| r.wcontext->write(value, String::Untaint_lang::NO /*always object, not string*/); | Table::Action_options o=get_action_options(r, params, 2, table); |
| return table.locate(name, value, o); | |
| } | } |
| static void _line(Request& r, const String&, Array *) { | static void _locate(Request& r, MethodParams& params) { |
| Pool& pool=r.pool(); | Table& table=GET_SELF(r, VTable).table(); |
| Value& value=*new(pool) VInt(pool, 1+r.self->as_vtable().table().get_current()); | |
| r.wcontext->write(value, String::Untaint_lang::NO /*always object, not string*/); | bool result=params[0].get_junction() || (params.count() == 1) ? |
| _locate_expression(table, r, params) : | |
| _locate_name_value(table, r, params); | |
| r.write(VBool::get(result)); | |
| } | } |
| static void _offset(Request& r, const String&, Array *params) { | |
| Pool& pool=r.pool(); | static void _flip(Request& r, MethodParams&) { |
| Table& table=r.self->as_vtable().table(); | Table& old_table=GET_SELF(r, VTable).table(); |
| if(params->size()) { | Table& new_table=*new Table(0); |
| if(int size=table.size()) { | if(size_t old_count=old_table.count()) |
| int offset=static_cast<int>( | if(size_t old_cols=old_table.columns()?old_table.columns()->count():old_table.max_cells()) |
| r.process(*static_cast<Value *>(params->get(0))).get_double()); | for(size_t column=0; column<old_cols; column++) { |
| table.set_current((table.get_current()+offset+size)%size); | Table::element_type new_row(new ArrayString(old_count)); |
| for(size_t i=0; i<old_count; i++) { | |
| Table::element_type old_row=old_table[i]; | |
| *new_row+=column<old_row->count()?old_row->get(column):new String; | |
| } | |
| new_table+=new_row; | |
| } | |
| r.write(*new VTable(&new_table)); | |
| } | |
| static void _foreach(Request& r, MethodParams& params) { | |
| InCycle temp(r); | |
| const String* rownum_var_name=¶ms.as_string(0, "rownum-var name must be string"); | |
| const String* value_var_name=¶ms.as_string(1, "value-var name must be string"); | |
| Value& body_code=params.as_junction(2, "body must be code"); | |
| Value* delim_maybe_code=params.count()>3?¶ms[3]:0; | |
| Table& table=GET_SELF(r, VTable).table(); | |
| size_t saved_current=table.current(); | |
| rownum_var_name=rownum_var_name->is_empty()? 0 : rownum_var_name; | |
| value_var_name=value_var_name->is_empty()? 0 : value_var_name; | |
| Value* var_context=r.get_method_frame()->caller(); | |
| if(delim_maybe_code) { // delimiter set | |
| bool need_delim=false; | |
| for(size_t row=0; row<table.count(); row++) { | |
| table.set_current(row); | |
| if(rownum_var_name) | |
| r.put_element(*var_context, *rownum_var_name, new VString(*new String(String::Body::Format(row), String::L_CLEAN))); | |
| if(value_var_name) | |
| r.put_element(*var_context, *value_var_name, new VTable(&table)); | |
| Value& sv_processed=r.process(body_code); | |
| TempSkip4Delimiter skip(r); | |
| const String* s_processed=sv_processed.get_string(); | |
| if(s_processed && !s_processed->is_empty()) { // we have body | |
| if(need_delim) // need delim & iteration produced string? | |
| r.write(r.process(*delim_maybe_code)); | |
| else | |
| need_delim=true; | |
| } | |
| r.write(sv_processed); | |
| if(skip.check_break()) | |
| break; | |
| } | } |
| } else { | } else { |
| Value& value=*new(pool) VInt(pool, table.get_current()); | for(size_t row=0; row<table.count(); row++) { |
| r.wcontext->write(value, String::Untaint_lang::NO /*always object, not string*/); | table.set_current(row); |
| if(rownum_var_name) | |
| r.put_element(*var_context, *rownum_var_name, new VString(*new String(String::Body::Format(row), String::L_CLEAN))); | |
| if(value_var_name) | |
| r.put_element(*var_context, *value_var_name, new VTable(&table)); | |
| r.process_write(body_code); | |
| if(r.check_skip_break()) | |
| break; | |
| } | |
| } | |
| table.set_current(saved_current); | |
| } | |
| static void update_cell(HashStringValue::key_type aname, HashStringValue::value_type avalue, VTable *dest) { | |
| dest->put_element(String(aname, String::L_CLEAN), avalue); // new not required | |
| } | |
| inline Table::element_type row_from_string(Request& r, Value ¶m){ | |
| if(!param.is_string() && !param.get_junction()) | |
| throw Exception(PARSER_RUNTIME, 0, "row must be string, code or hash"); | |
| const String& string=r.process_to_string(param); | |
| // parse cells | |
| Table::element_type row=new ArrayString; | |
| string.split(*row, 0, "\t", String::L_AS_IS); | |
| return row; | |
| } | |
| static void _append(Request& r, MethodParams& params) { | |
| VTable vtable=GET_SELF(r, VTable); | |
| Table& table=vtable.table(); | |
| HashStringValue* hash=params[0].get_hash(); | |
| if(hash){ | |
| table+=new ArrayString(); | |
| size_t saved_current=table.current(); | |
| table.set_current(table.count()-1); | |
| hash->for_each<VTable*>(update_cell, &vtable); | |
| table.set_current(saved_current); | |
| } else { | |
| table+=row_from_string(r, params[0]); | |
| } | |
| } | |
| static void _insert(Request& r, MethodParams& params) { | |
| VTable vtable=GET_SELF(r, VTable); | |
| Table& table=vtable.table(); | |
| HashStringValue* hash=params[0].get_hash(); | |
| if(hash){ | |
| table.insert(table.current(), new ArrayString()); | |
| hash->for_each<VTable*>(update_cell, &vtable); | |
| } else { | |
| table.insert(table.current(), row_from_string(r, params[0])); | |
| } | |
| } | |
| static void _delete(Request& r, MethodParams&) { | |
| Table& table=GET_SELF(r, VTable).table(); | |
| table.remove_current(); | |
| } | |
| static void join_named_row(Table& src, Table* dest) { | |
| Table::columns_type dest_columns=dest->columns(); | |
| 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_column<dest_columns_count; dest_column++) { | |
| const String* src_item=src.item(*dest_columns->get(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& src=*params.as_table(0, "source"); | |
| Table::Action_options o=get_action_options(r, params, 1, src); | |
| Table& dest=GET_SELF(r, VTable).table(); | |
| if(&src == &dest) | |
| throw Exception(PARSER_RUNTIME, 0, "source and destination are same table"); | |
| if(dest.columns()) // dest is named | |
| src.table_for_each(join_named_row, &dest, o); | |
| else // dest is nameless | |
| src.table_for_each(join_nameless_row, &dest, o); | |
| } | |
| #ifndef DOXYGEN | |
| class Table_sql_event_handlers: public SQL_Driver_query_event_handlers { | |
| ArrayString& columns; | |
| int columns_count; | |
| ArrayString* row; | |
| public: | |
| Table* table; | |
| public: | |
| Table_sql_event_handlers() : | |
| columns(*new ArrayString), row(0), table(0) { | |
| } | |
| bool add_column(SQL_Error& error, const char *str, size_t ) { | |
| try { | |
| columns+=new String(str, String::L_TAINTED /* no length as 0x00 can be inside */); | |
| return false; | |
| } catch(...) { | |
| error=SQL_Error("exception occurred in Table_sql_event_handlers::add_column"); | |
| return true; | |
| } | |
| } | |
| bool before_rows(SQL_Error& error) { | |
| if(table) { | |
| error=SQL_Error("result must contain exactly one table"); | |
| return true; | |
| } | |
| try { | |
| table=new Table(&columns); | |
| columns_count=columns.count(); | |
| return false; | |
| } catch(...) { | |
| error=SQL_Error("exception occurred in Table_sql_event_handlers::before_rows"); | |
| return true; | |
| } | |
| } | |
| bool add_row(SQL_Error& error) { | |
| try { | |
| *table+=row=new ArrayString(columns_count); | |
| return false; | |
| } catch(...) { | |
| error=SQL_Error("exception occurred in Table_sql_event_handlers::add_row"); | |
| return true; | |
| } | |
| } | } |
| bool add_row_cell(SQL_Error& error, const char* str, size_t ) { | |
| try { | |
| *row+=str?new String(str, String::L_TAINTED /* no length as 0x00 can be inside */):&String::Empty; | |
| return false; | |
| } catch(...) { | |
| error=SQL_Error("exception occurred in Table_sql_event_handlers::add_row_cell"); | |
| return true; | |
| } | |
| } | |
| }; | |
| #endif | |
| static void marshal_bind( HashStringValue::key_type aname, HashStringValue::value_type avalue, SQL_Driver::Placeholder** pptr) { | |
| SQL_Driver::Placeholder& ph=**pptr; | |
| ph.name=aname.cstr(); | |
| ph.value=avalue->as_string().untaint_cstr(String::L_AS_IS); | |
| ph.is_null=avalue->get_class()==void_class; | |
| ph.were_updated=false; | |
| (*pptr)++; | |
| } | |
| // not static, used elsewhere | |
| int marshal_binds(HashStringValue& hash, SQL_Driver::Placeholder*& placeholders) { | |
| int hash_count=hash.count(); | |
| placeholders=new(PointerGC) SQL_Driver::Placeholder[hash_count]; | |
| SQL_Driver::Placeholder* ptr=placeholders; | |
| hash.for_each<SQL_Driver::Placeholder**>(marshal_bind, &ptr); | |
| return hash_count; | |
| } | |
| // not static, used elsewhere | |
| void unmarshal_bind_updates(HashStringValue& hash, int placeholder_count, SQL_Driver::Placeholder* placeholders) { | |
| SQL_Driver::Placeholder* ph=placeholders; | |
| for(int i=0; i<placeholder_count; i++, ph++) | |
| if(ph->were_updated) { | |
| Value* value; | |
| if(ph->is_null) | |
| value=VVoid::get(); | |
| else | |
| value=new VString(*new String(ph->value, String::L_TAINTED)); | |
| hash.put(ph->name, value); | |
| } | |
| } | } |
| static void _menu(Request& r, const String& method_name, Array *params) { | static void _sql(Request& r, MethodParams& params) { |
| Value& body_code=*static_cast<Value *>(params->get(0)); | Value& statement=params.as_junction(0, "statement must be code"); |
| // forcing ^menu{this param type} | |
| r.fail_if_junction_(false, body_code, | HashStringValue* bind=0; |
| method_name, "body must be junction"); | ulong limit=SQL_NO_LIMIT; |
| ulong offset=0; | |
| if(params.count()>1) | |
| if(HashStringValue* options=params.as_hash(1, "sql options")) { | |
| int valid_options=0; | |
| if(Value* vbind=options->get(sql_bind_name)) { | |
| valid_options++; | |
| bind=vbind->get_hash(); | |
| } | |
| if(Value* vlimit=options->get(sql_limit_name)) { | |
| valid_options++; | |
| limit=(ulong)r.process(*vlimit).as_double(); | |
| } | |
| if(Value* voffset=options->get(sql_offset_name)) { | |
| valid_options++; | |
| offset=(ulong)r.process(*voffset).as_double(); | |
| } | |
| if(valid_options!=options->count()) | |
| throw Exception(PARSER_RUNTIME, 0, CALLED_WITH_INVALID_OPTION); | |
| } | |
| SQL_Driver::Placeholder* placeholders=0; | |
| uint placeholders_count=0; | |
| if(bind) | |
| placeholders_count=marshal_binds(*bind, placeholders); | |
| const String& statement_string=r.process_to_string(statement); | |
| const char* statement_cstr=statement_string.untaint_cstr(String::L_SQL, r.connection()); | |
| Table_sql_event_handlers handlers; | |
| r.connection()->query( | |
| statement_cstr, | |
| placeholders_count, placeholders, | |
| offset, limit, | |
| handlers, | |
| statement_string); | |
| Value *delim_code=params->size()==2?static_cast<Value *>(params->get(1)):0; | if(bind) |
| unmarshal_bind_updates(*bind, placeholders_count, placeholders); | |
| Table& table=r.self->as_vtable().table(); | Table& result= |
| bool need_delim=false; | handlers.table?*handlers.table: // query resulted in table? return it |
| for(int i=0; i<table.size(); i++) { | *new Table(Table::columns_type(0)); // query returned no table, fake it |
| table.set_current(i); | |
| Value& processed_body=r.process(body_code); | // replace any previous table value |
| if(delim_code) { // delimiter set? | GET_SELF(r, VTable).set_table(result); |
| const String *string=processed_body.get_string(); | } |
| if(need_delim && string && string->size()) // need delim & iteration produced string? | |
| r.write_pass_lang(r.process(*delim_code)); | static void _columns(Request& r, MethodParams& params) { |
| need_delim=true; | const String* column_column_name; |
| if(params.count()>0) | |
| column_column_name=¶ms.as_string(0, COLUMN_NAME_MUST_BE_STRING); | |
| else | |
| column_column_name=new String("column"); | |
| Table::columns_type result_columns(new ArrayString); | |
| *result_columns+=column_column_name; | |
| Table& result_table=*new Table(result_columns); | |
| Table& source_table=GET_SELF(r, VTable).table(); | |
| if(Table::columns_type source_columns=source_table.columns()) { | |
| for(Array_iterator<const String*> i(*source_columns); i.has_next(); ) { | |
| Table::element_type result_row(new ArrayString); | |
| *result_row+=i.next(); | |
| result_table+=result_row; | |
| } | } |
| r.write_pass_lang(processed_body); | |
| } | } |
| r.write(*new VTable(&result_table)); | |
| } | } |
| static void _empty(Request& r, const String&, Array *params) { | static void _select(Request& r, MethodParams& params) { |
| Table& table=r.self->as_vtable().table(); | Value& vcondition=params.as_expression(0, "condition must be number, bool or expression"); |
| if(table.size()==0) { | |
| Value& value=r.process(*static_cast<Value *>(params->get(0))); | Table& source_table=GET_SELF(r, VTable).table(); |
| r.write_pass_lang(value); | |
| } else if(params->size()==2) { | int limit=source_table.count(); |
| Value& value=r.process(*static_cast<Value *>(params->get(1))); | int offset=0; |
| r.write_pass_lang(value); | bool reverse=false; |
| if(params.count()>1) | |
| if(HashStringValue* options=params.as_hash(1)) { | |
| int valid_options=0; | |
| if(Value* vlimit=options->get(sql_limit_name)) { | |
| valid_options++; | |
| limit=r.process(*vlimit).as_int(); | |
| } | |
| if(Value* voffset=options->get(sql_offset_name)) { | |
| valid_options++; | |
| offset=r.process(*voffset).as_int(); | |
| } | |
| if(Value* vreverse=options->get(table_reverse_name)) { | |
| valid_options++; | |
| reverse=r.process(*vreverse).as_bool(); | |
| } | |
| if(valid_options!=options->count()) | |
| throw Exception(PARSER_RUNTIME, 0, CALLED_WITH_INVALID_OPTION); | |
| } | |
| Table& result_table=*new Table(source_table.columns()); | |
| size_t size=source_table.count(); | |
| if(offset<0) | |
| offset+=size; | |
| if(size && limit>0 && offset>=0 && (size_t)offset<size){ | |
| size_t saved_current=source_table.current(); | |
| size_t appended=0; | |
| if(reverse){ | |
| for(size_t row=size-1; result_table.count() < (size_t)limit; row--) { | |
| source_table.set_current(row); | |
| bool condition=r.process(vcondition).as_bool(); | |
| if(condition && ++appended > (size_t)offset) // ...condition is true, adding to the result | |
| result_table+=source_table[row]; | |
| if(row==0) break; | |
| } | |
| } else { | |
| for(size_t row=0; row < size && result_table.count() < (size_t)limit; row++) { | |
| source_table.set_current(row); | |
| bool condition=r.process(vcondition).as_bool(); | |
| if(condition && ++appended > (size_t)offset) // ...condition is true, adding to the result | |
| result_table+=source_table[row]; | |
| } | |
| } | |
| source_table.set_current(saved_current); | |
| } | } |
| r.write(*new VTable(&result_table)); | |
| } | } |
| void initialize_table_class(Pool& pool, VClass& vclass) { | // constructor |
| // ^table.set[data] ^table.set[nameless;data] | |
| vclass.add_native_method("set", _set, 1, 2); | |
| // ^table.load[file] ^table.load[nameless;file] | MTable::MTable(): Methoded("table") { |
| vclass.add_native_method("load", _load, 1, 2); | // ^table::create{data} |
| // ^table::create[nameless]{data} | |
| // ^table::create[table] | |
| add_native_method("create", Method::CT_DYNAMIC, _create, 1, 3); | |
| // old name for compatibility with <= v 1.141 2002/01/25 11:33:45 paf | |
| add_native_method("set", Method::CT_DYNAMIC, _create, 1, 3); | |
| // ^table::load[file] | |
| // ^table::load[nameless;file] | |
| add_native_method("load", Method::CT_DYNAMIC, _load, 1, 3); | |
| // ^table.save[file] | |
| // ^table.save[nameless;file] | |
| add_native_method("save", Method::CT_DYNAMIC, _save, 1, 3); | |
| // add_native_method("save_old", Method::CT_DYNAMIC, _save_old, 1, 3); | |
| // ^table.csv-string[] | |
| // ^table.csv-string[nameless] | |
| // ^table.csv-string[nameless;$.encloser["] $.separator[,]] | |
| add_native_method("csv-string", Method::CT_DYNAMIC, _csv_string, 0, 2); | |
| // ^table.count[] | // ^table.count[] |
| vclass.add_native_method("count", _count, 0, 0); | // ^table.count[rows] |
| // ^table.count[columns] | |
| // ^table.count[cells] | |
| add_native_method("count", Method::CT_DYNAMIC, _count, 0, 1); | |
| // ^table.line[] | // ^table.line[] |
| vclass.add_native_method("line", _line, 0, 0); | add_native_method("line", Method::CT_DYNAMIC, _line, 0, 0); |
| // ^table.offset[] | |
| // ^table.offset(offset) | |
| // ^table.offset[cur|set](offset) | |
| add_native_method("offset", Method::CT_DYNAMIC, _offset, 0, 2); | |
| // ^table.menu{code} | |
| // ^table.menu{code}[delim] | |
| add_native_method("menu", Method::CT_DYNAMIC, _menu, 1, 2); | |
| // ^table.hash[key field name] | |
| // ^table.hash[key field name][value field name(s) string/table] | |
| add_native_method("hash", Method::CT_DYNAMIC, _hash, 1, 3); | |
| // ^table.offset[] ^table.offset[offset] | // ^table.sort{string-key-maker} ^table.sort{string-key-maker}[desc|asc] |
| vclass.add_native_method("offset", _offset, 0, 1); | // ^table.sort(numeric-key-maker) ^table.sort(numeric-key-maker)[desc|asc] |
| add_native_method("sort", Method::CT_DYNAMIC, _sort, 1, 2); | |
| // ^table.menu{code} ^table.menu{code}[delim] | // ^table.locate[field;value] |
| vclass.add_native_method("menu", _menu, 1, 2); | add_native_method("locate", Method::CT_DYNAMIC, _locate, 1, 3); |
| // ^table.empty{code-when-empty} ^table.empty{code-when-empty}{code-when-not} | // ^table.flip[] |
| vclass.add_native_method("empty", _empty, 1, 2); | add_native_method("flip", Method::CT_DYNAMIC, _flip, 0, 0); |
| } | // ^table.foreach[row-num;value]{code} |
| // ^table.foreach[row-num;value]{code}[delim] | |
| add_native_method("foreach", Method::CT_DYNAMIC, _foreach, 3, 4); | |
| // ^table.append{row{tab}data} | |
| add_native_method("append", Method::CT_DYNAMIC, _append, 1, 1); | |
| // ^table.insert{row{tab}data} before current row | |
| add_native_method("insert", Method::CT_DYNAMIC, _insert, 1, 1); | |
| // ^table.delete[] current row | |
| add_native_method("delete", Method::CT_DYNAMIC, _delete, 0, 0); | |
| // ^table.join[table][$.limit(10) $.offset(1) $.offset[cur] ] | |
| add_native_method("join", Method::CT_DYNAMIC, _join, 1, 2); | |
| // ^table::sql[query] | |
| // ^table::sql[query][$.limit(1) $.offset(2)] | |
| add_native_method("sql", Method::CT_DYNAMIC, _sql, 1, 2); | |
| // ^table.columns[[column name]] | |
| add_native_method("columns", Method::CT_DYNAMIC, _columns, 0, 1); | |
| // ^table.select(expression) = table | |
| add_native_method("select", Method::CT_DYNAMIC, _select, 1, 2); | |
| } |