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| version 1.2, 2001/03/10 11:03:47 | version 1.136, 2004/03/01 08:54:16 |
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| Line 1 | Line 1 |
| /* | /** @file |
| $Id$ | Parser: @b string parser class. |
| Copyright (c) 2001-2004 ArtLebedev Group (http://www.artlebedev.com) | |
| Author: Alexandr Petrosian <paf@design.ru> (http://paf.design.ru) | |
| */ | */ |
| static const char * const IDENT_STRING_C="$Date$"; | |
| #include "classes.h" | |
| #include "pa_vmethod_frame.h" | |
| #include "pa_request.h" | #include "pa_request.h" |
| #include "_string.h" | |
| #include "pa_vdouble.h" | #include "pa_vdouble.h" |
| #include "pa_vint.h" | #include "pa_vint.h" |
| #include "pa_vtable.h" | |
| #include "pa_vbool.h" | |
| #include "pa_string.h" | |
| #include "pa_sql_connection.h" | |
| #include "pa_dictionary.h" | |
| #include "pa_vmethod_frame.h" | |
| // class | |
| class MString: public Methoded { | |
| public: | |
| MString(); | |
| public: // Methoded | |
| bool used_directly() { return true; } | |
| }; | |
| // global var | // global variable |
| VClass *string_class; | DECLARE_CLASS_VAR(string, new MString, 0); |
| // defines for statics | |
| #define MATCH_VAR_NAME "match" | |
| #define TRIM_START_OPTION "start" | |
| #define TRIM_BOTH_OPTION "both" | |
| #define TRIM_END_OPTION "end" | |
| // statics | |
| static const String match_var_name(MATCH_VAR_NAME); | |
| // methods | // methods |
| static void _length(Request& r, Array *) { | static void _length(Request& r, MethodParams&) { |
| Pool& pool=r.pool(); | double result=GET_SELF(r, VString).string().length(); |
| Value& value=*new(pool) VDouble(pool, r.self->as_string().size()); | r.write_no_lang(*new VDouble(result)); |
| r.wcontext->write(value); | } |
| static void _int(Request& r, MethodParams& params) { | |
| const String& self_string=GET_SELF(r, VString).string(); | |
| int converted; | |
| Value* default_code=params.count()>0?¶ms.as_junction(0, "default must be int") | |
| :0; // (default) | |
| try { | |
| if(self_string.is_empty()) | |
| throw Exception("parser.runtime", | |
| 0, | |
| "parameter is empty string, error converting"); | |
| converted=self_string.as_int(); | |
| } catch(...) { // convert problem | |
| if(default_code) | |
| converted=r.process_to_value(*default_code).as_int(); | |
| else | |
| rethrow; // we have a problem when no default | |
| } | |
| r.write_no_lang(*new VInt(converted)); | |
| } | } |
| static void _int(Request& r, Array *) { | static void _double(Request& r, MethodParams& params) { |
| Pool& pool=r.pool(); | const String& self_string=GET_SELF(r, VString).string(); |
| Value& value=*new(pool) VInt(pool, static_cast<int>(r.self->get_double())); | double converted; |
| r.wcontext->write(value); | Value* default_code=params.count()>0?¶ms.as_junction(0, "default must be double") |
| :0; // (default) | |
| try { | |
| if(self_string.is_empty()) | |
| throw Exception("parser.runtime", | |
| 0, | |
| "parameter is empty string, error converting"); | |
| converted=self_string.as_double(); | |
| } catch(...) { // convert problem | |
| if(default_code) | |
| converted=r.process_to_value(*default_code).as_double(); | |
| else | |
| rethrow; // we have a problem when no default | |
| } | |
| r.write_no_lang(*new VDouble(converted)); | |
| } | |
| /*not static*/void _string_format(Request& r, MethodParams& params) { | |
| Value& fmt_maybe_code=params[0]; | |
| // for some time due to stupid {} in original design | |
| const String& fmt=r.process_to_string(fmt_maybe_code); | |
| const char* buf=format(r.get_self().as_double(), fmt.cstrm()); | |
| r.write_no_lang(String(buf)); | |
| } | } |
| static void _double(Request& r, Array *) { | static void _left(Request& r, MethodParams& params) { |
| Pool& pool=r.pool(); | size_t n=(size_t)params.as_int(0, "n must be int", r); |
| Value& value=*new(pool) VDouble(pool, r.self->get_double()); | |
| r.wcontext->write(value); | const String& string=GET_SELF(r, VString).string(); |
| r.write_assign_lang(string.mid(0, n)); | |
| } | } |
| void initialize_string_class(Pool& pool, VClass& vclass) { | static void _right(Request& r, MethodParams& params) { |
| // ^string.length[] | size_t n=(size_t)params.as_int(0, "n must be int", r); |
| String& LENGTH_NAME=*new(pool) String(pool); | |
| LENGTH_NAME.APPEND_CONST("length"); | const String& string=GET_SELF(r, VString).string(); |
| size_t length=string.length(); | |
| r.write_assign_lang(n<length?string.mid(length-n, string.length()):string); | |
| } | |
| Method& LENGTH_METHOD=*new(pool) Method(pool, | static void _mid(Request& r, MethodParams& params) { |
| LENGTH_NAME, | const String& string=GET_SELF(r, VString).string(); |
| 0, 0, // min,max numbered_params_count | |
| 0/*params_names*/, 0/*locals_names*/, | |
| 0/*parser_code*/, _length | |
| ); | |
| vclass.add_method(LENGTH_NAME, LENGTH_METHOD); | |
| // ^string.int[] | size_t p=(size_t)max(0, params.as_int(0, "p must be int", r)); |
| String& INT_NAME=*new(pool) String(pool); | size_t n=params.count()>1? |
| INT_NAME.APPEND_CONST("int"); | (size_t)max(0, params.as_int(1, "n must be int", r)):string.length(); |
| r.write_assign_lang(string.mid(p, p+n)); | |
| } | |
| static void _pos(Request& r, MethodParams& params) { | |
| Value& substr=params.as_no_junction(0, "substr must not be code"); | |
| const String& string=GET_SELF(r, VString).string(); | |
| r.write_assign_lang(*new VInt((int)string.pos(substr.as_string()))); | |
| } | |
| static void split_list(MethodParams& params, int paramIndex, | |
| const String& string, | |
| ArrayString& result) { | |
| Value& delim_value=params.as_no_junction(paramIndex, "delimiter must not be code"); | |
| size_t pos_after=0; | |
| string.split(result, pos_after, delim_value.as_string()); | |
| } | |
| #define SPLIT_LEFT 0x0001 | |
| #define SPLIT_RIGHT 0x0010 | |
| #define SPLIT_HORIZONTAL 0x0100 | |
| #define SPLIT_VERTICAL 0x1000 | |
| static int split_options(const String* options) { | |
| struct Split_option { | |
| const char* keyL; | |
| const char* keyU; | |
| int setBit; | |
| int checkBit; | |
| } split_option[]={ | |
| {"l", "L", SPLIT_LEFT, SPLIT_RIGHT}, // 0xVHRL | |
| {"r", "R", SPLIT_RIGHT, SPLIT_LEFT}, | |
| {"h", "H", SPLIT_HORIZONTAL, SPLIT_VERTICAL}, | |
| {"v", "V", SPLIT_VERTICAL, SPLIT_HORIZONTAL}, | |
| {0, 0, 0, 0} | |
| }; | |
| int result=0; | |
| if(options) { | |
| for(Split_option *o=split_option; o->keyL; o++) | |
| if(options->pos(o->keyL)!=STRING_NOT_FOUND | |
| || (o->keyU && options->pos(o->keyU)!=STRING_NOT_FOUND)) { | |
| if(result & o->checkBit) | |
| throw Exception("parser.runtime", | |
| options, | |
| "conflicting split options"); | |
| result |= o->setBit; | |
| } | |
| } | |
| return result; | |
| } | |
| static Table& split_vertical(ArrayString& pieces, bool right) { | |
| Table::columns_type columns(new ArrayString); | |
| *columns+=new String("piece"); | |
| Table& table=*new Table(columns, pieces.count()); | |
| if(right) { // right | |
| for(int i=pieces.count(); --i>=0; ) { | |
| Table::element_type row(new ArrayString); | |
| *row+=pieces[i]; | |
| table+=row; | |
| } | |
| } else { // left | |
| Array_iterator<const String*> i(pieces); | |
| while(i.has_next()) { | |
| Table::element_type row(new ArrayString); | |
| *row+=i.next(); | |
| table+=row; | |
| } | |
| } | |
| Method& INT_METHOD=*new(pool) Method(pool, | return table; |
| INT_NAME, | } |
| 0, 0, // min,max numbered_params_count | |
| 0/*params_names*/, 0/*locals_names*/, | static Table& split_horizontal(ArrayString& pieces, bool right) { |
| 0/*parser_code*/, _int | Table& table=*new Table(Table::columns_type(0) /* nameless */); |
| ); | Table::element_type row(new ArrayString(pieces.count())); |
| vclass.add_method(INT_NAME, INT_METHOD); | if(right) { // right |
| for(int i=pieces.count(); --i>=0; ) | |
| *row+=pieces[i]; | |
| } else { // left | |
| for(Array_iterator<const String*> i(pieces); i.has_next(); ) | |
| *row+=i.next(); | |
| } | |
| table+=row; | |
| return table; | |
| } | |
| static void split_with_options(Request& r, MethodParams& params, | |
| int bits) { | |
| const String& string=GET_SELF(r, VString).string(); | |
| ArrayString pieces; | |
| split_list(params, 0, string, pieces); | |
| if(!bits) { | |
| const String* options=0; | |
| if(params.count()>1) | |
| options=¶ms.as_string(1, "options must not be code"); | |
| bits=split_options(options); | |
| } | |
| bool right=(bits & SPLIT_RIGHT) != 0; | |
| bool horizontal=(bits & SPLIT_HORIZONTAL) !=0; | |
| Table& table=horizontal?split_horizontal(pieces, right) | |
| :split_vertical(pieces, right); | |
| r.write_no_lang(*new VTable(&table)); | |
| } | |
| static void _split(Request& r, MethodParams& params) { | |
| split_with_options(r, params, 0 /* maybe-determine from param #2 */); | |
| } | |
| static void _lsplit(Request& r, MethodParams& params) { | |
| split_with_options(r, params, SPLIT_LEFT); | |
| } | |
| static void _rsplit(Request& r, MethodParams& params) { | |
| split_with_options(r, params, SPLIT_RIGHT); | |
| } | |
| static void search_action(Table& table, Table::element_type row, int, int, int, int, void *) { | |
| if(row) | |
| table+=row; | |
| } | |
| #ifndef DOXYGEN | |
| struct Replace_action_info { | |
| Request* request; | |
| const String* src; String* dest; | |
| VTable* vtable; | |
| Value* replacement_code; | |
| }; | |
| #endif | |
| /// @todo they can do $global[$result] there, getting pointer to later-invalid local var, kill this | |
| static void replace_action(Table& table, ArrayString* row, | |
| int prestart, int prefinish, | |
| int poststart, int postfinish, | |
| void *info) { | |
| Replace_action_info& ai=*static_cast<Replace_action_info *>(info); | |
| if(row) { // begin&middle | |
| // piece from last match['prestart'] to beginning of this match['prefinish'] | |
| if(prestart!=prefinish) | |
| *ai.dest << ai.src->mid(prestart, prefinish);//ai.dest->APPEND_CONST("-"); | |
| // store found parts in one-record VTable | |
| if(table.count()) // middle | |
| table.put(0, row); | |
| else // begin | |
| table+=row; | |
| { // execute 'replacement_code' in 'table' context | |
| ai.vtable->set_table(table); | |
| *ai.dest << ai.request->process_to_string(*ai.replacement_code); | |
| } | |
| } else // end | |
| *ai.dest << ai.src->mid(poststart, postfinish); | |
| } | |
| /// @todo use pcre:study somehow | |
| static void _match(Request& r, MethodParams& params) { | |
| Value& regexp=params.as_no_junction(0, "regexp must not be code"); | |
| const String* options= | |
| params.count()>1? | |
| ¶ms.as_no_junction(1, "options must not be code").as_string():0; | |
| Temp_lang temp_lang(r, String::L_PASS_APPENDED); | |
| const String& src=GET_SELF(r, VString).string(); | |
| bool just_matched; | |
| if(params.count()<3) { // search | |
| Table* table=src.match(r.charsets.source(), | |
| regexp.as_string(), options, | |
| search_action, 0, | |
| just_matched); | |
| Value* result; | |
| if(table) | |
| result=new VTable(table); // table of pre/match/post+substrings | |
| else | |
| result=new VBool(just_matched); | |
| r.write_assign_lang(*result); | |
| } else { // replace | |
| Value& replacement_code=params.as_junction(2, "replacement param must be code"); | |
| String result; | |
| VTable* vtable=new VTable; | |
| Replace_action_info info={ | |
| &r, | |
| &src, | |
| &result, | |
| vtable, | |
| &replacement_code | |
| }; | |
| Temp_value_element temp_match_var( | |
| *replacement_code.get_junction()->method_frame, | |
| match_var_name, vtable); | |
| src.match(r.charsets.source(), | |
| r.process_to_string(regexp), options, | |
| replace_action, &info, | |
| just_matched); | |
| r.write_assign_lang(result); | |
| } | |
| } | |
| static void change_case(Request& r, MethodParams&, | |
| String::Change_case_kind kind) { | |
| const String& src=GET_SELF(r, VString).string(); | |
| r.write_assign_lang(src.change_case(r.charsets.source(), kind)); | |
| } | |
| static void _upper(Request& r, MethodParams& params) { | |
| change_case(r, params, String::CC_UPPER); | |
| } | |
| static void _lower(Request& r, MethodParams& params) { | |
| change_case(r, params, String::CC_LOWER); | |
| } | |
| #ifndef DOXYGEN | |
| class String_sql_event_handlers: public SQL_Driver_query_event_handlers { | |
| const String& statement_string; const char* statement_cstr; | |
| bool got_column; | |
| public: | |
| bool got_cell; | |
| String& result; | |
| public: | |
| String_sql_event_handlers( | |
| const String& astatement_string, const char* astatement_cstr): | |
| statement_string(astatement_string), statement_cstr(astatement_cstr), | |
| got_column(false), | |
| got_cell(false), | |
| result(*new String) {} | |
| bool add_column(SQL_Error& error, const char* /*str*/, size_t /*length*/) { | |
| if(got_column) { | |
| error=SQL_Error("parser.runtime", | |
| //statement_string, | |
| "result must contain exactly one column"); | |
| return true; | |
| } | |
| got_column=true; | |
| return false; | |
| } | |
| bool before_rows(SQL_Error& /*error*/ ) { /* ignore */ return false; } | |
| bool add_row(SQL_Error& /*error*/) { /* ignore */ return false; } | |
| bool add_row_cell(SQL_Error& error, const char* str, size_t length) { | |
| if(got_cell) { | |
| error=SQL_Error("parser.runtime", | |
| //statement_string, | |
| "result must not contain more then one row"); | |
| return true; | |
| } | |
| try { | |
| got_cell=true; | |
| result.append_know_length(str, length, String::L_TAINTED); | |
| return false; | |
| } catch(...) { | |
| error=SQL_Error("exception occured in String_sql_event_handlers::add_row_cell"); | |
| return true; | |
| } | |
| } | |
| }; | |
| #endif | |
| extern String sql_limit_name; | |
| extern String sql_offset_name; | |
| extern String sql_default_name; | |
| extern String sql_distinct_name; | |
| const String* sql_result_string(Request& r, MethodParams& params, | |
| HashStringValue*& options, Value*& default_code) { | |
| Value& statement=params.as_junction(0, "statement must be code"); | |
| ulong limit=0; | |
| ulong offset=0; | |
| default_code=0; | |
| if(params.count()>1) { | |
| Value& voptions=params.as_no_junction(1, "options must be hash, not code"); | |
| if(!voptions.is_string()) | |
| if((options=voptions.get_hash())) { | |
| if(Value* vlimit=options->get(sql_limit_name)) | |
| limit=(ulong)r.process_to_value(*vlimit).as_double(); | |
| if(Value* voffset=options->get(sql_offset_name)) | |
| offset=(ulong)r.process_to_value(*voffset).as_double(); | |
| if((default_code=options->get(sql_default_name))) { | |
| if(!default_code->get_junction()) | |
| throw Exception("parser.runtime", | |
| 0, | |
| "default option must be code"); | |
| } | |
| } else | |
| throw Exception("parser.runtime", | |
| 0, | |
| "options must be hash"); | |
| } else | |
| options=0; | |
| Temp_lang temp_lang(r, String::L_SQL); | |
| const String& statement_string=r.process_to_string(statement); | |
| const char* statement_cstr= | |
| statement_string.cstr(String::L_UNSPECIFIED, r.connection()); | |
| String_sql_event_handlers handlers(statement_string, statement_cstr); | |
| r.connection()->query( | |
| statement_cstr, offset, limit, | |
| handlers, | |
| statement_string); | |
| if(!handlers.got_cell) | |
| return 0; // no lines, caller should return second param[default value] | |
| return &handlers.result; | |
| } | |
| static void _sql(Request& r, MethodParams& params) { | |
| HashStringValue* options; | |
| Value* default_code; | |
| const String* string=sql_result_string(r, params, options, default_code); | |
| if(!string) { | |
| if(default_code) { | |
| string=&r.process_to_string(*default_code); | |
| } else | |
| throw Exception("parser.runtime", | |
| 0, | |
| "produced no result, but no default option specified"); | |
| } | |
| r.write_assign_lang(*string); | |
| } | |
| static void _replace(Request& r, MethodParams& params) { | |
| const String& src=GET_SELF(r, VString).string(); | |
| Table* table=params.as_no_junction(0, "parameter must not be code").get_table(); | |
| if(!table) | |
| throw Exception("parser.runtime", | |
| 0, | |
| "parameter must be table"); | |
| Dictionary dict(*table); | |
| r.write_assign_lang(src.replace(dict)); | |
| } | |
| static void _save(Request& r, MethodParams& params) { | |
| const String& file_name=params.as_string(params.count()-1, | |
| "file name must be string"); | |
| const String& src=GET_SELF(r, VString).string(); | |
| bool do_append=false; | |
| if(params.count()>1) { | |
| const String& mode=params.as_string(0, "mode must be string"); | |
| if(mode=="append") | |
| do_append=true; | |
| else | |
| throw Exception("parser.runtime", | |
| &mode, | |
| "unknown mode, must be 'append'"); | |
| } | |
| // write | |
| const char* buf=src.cstr(String::L_UNSPECIFIED, r.connection(false/*no error if none*/)); | |
| file_write(r.absolute(file_name), | |
| buf, strlen(buf), true, do_append); | |
| } | |
| static void _normalize(Request& r, MethodParams&) { | |
| const String& src=GET_SELF(r, VString).string(); | |
| r.write_assign_lang(src); | |
| } | |
| static void _trim(Request& r, MethodParams& params) { | |
| const String& src=GET_SELF(r, VString).string(); | |
| String::Trim_kind kind=String::TRIM_BOTH; | |
| const char* chars=0; | |
| if(params.count()>0) { | |
| const String& skind=params.as_string(0, | |
| "'where' must be string"); | |
| if(skind==TRIM_START_OPTION) | |
| kind=String::TRIM_START; | |
| else if(skind==TRIM_END_OPTION) | |
| kind=String::TRIM_END; | |
| else if(skind==TRIM_BOTH_OPTION) | |
| kind=String::TRIM_BOTH; | |
| else | |
| throw Exception("parser.runtime", | |
| &skind, | |
| "'kind' should be one of "TRIM_START_OPTION", "TRIM_BOTH_OPTION", "TRIM_END_OPTION); | |
| if(params.count()>1) { | |
| const String& schars=params.as_string(1, "'chars' must be string"); | |
| if(!schars.length()) | |
| throw Exception("parser.runtime", | |
| 0, | |
| "'chars' must not be empty"); | |
| chars=schars.cstr(); | |
| } | |
| } | |
| r.write_assign_lang(src.trim(kind, chars)); | |
| } | |
| // constructor | |
| MString::MString(): Methoded("string") { | |
| // ^string.length[] | |
| add_native_method("length", Method::CT_DYNAMIC, _length, 0, 0); | |
| // ^string.int[] | |
| // ^string.int(default) | |
| add_native_method("int", Method::CT_DYNAMIC, _int, 0, 1); | |
| // ^string.double[] | // ^string.double[] |
| String& DOUBLE_NAME=*new(pool) String(pool); | // ^string.double(default) |
| DOUBLE_NAME.APPEND_CONST("double"); | add_native_method("double", Method::CT_DYNAMIC, _double, 0, 1); |
| Method& DOUBLE_METHOD=*new(pool) Method(pool, | // ^string.format{format} |
| DOUBLE_NAME, | add_native_method("format", Method::CT_DYNAMIC, _string_format, 1, 1); |
| 0, 0, // min,max numbered_params_count | |
| 0/*params_names*/, 0/*locals_names*/, | |
| 0/*parser_code*/, _double | |
| ); | |
| vclass.add_method(DOUBLE_NAME, DOUBLE_METHOD); | |
| } | |
| // ^string.left(n) | |
| add_native_method("left", Method::CT_DYNAMIC, _left, 1, 1); | |
| // ^string.right(n) | |
| add_native_method("right", Method::CT_DYNAMIC, _right, 1, 1); | |
| // ^string.mid(p;n) | |
| add_native_method("mid", Method::CT_DYNAMIC, _mid, 1, 2); | |
| // ^string.pos[substr] | |
| add_native_method("pos", Method::CT_DYNAMIC, _pos, 1, 1); | |
| // ^string.split[delim] | |
| // ^string.split[delim][options] | |
| add_native_method("split", Method::CT_DYNAMIC, _split, 1, 2); | |
| // old names for backward compatibility | |
| // ^string.lsplit[delim] | |
| add_native_method("lsplit", Method::CT_DYNAMIC, _lsplit, 1, 1); | |
| // ^string.rsplit[delim] | |
| add_native_method("rsplit", Method::CT_DYNAMIC, _rsplit, 1, 1); | |
| // ^string.match[regexp][options] | |
| // ^string.match[regexp][options]{replacement-code} | |
| add_native_method("match", Method::CT_DYNAMIC, _match, 1, 3); | |
| // ^string.toupper[] | |
| add_native_method("upper", Method::CT_DYNAMIC, _upper, 0, 0); | |
| // ^string.tolower[] | |
| add_native_method("lower", Method::CT_DYNAMIC, _lower, 0, 0); | |
| // ^sql[query] | |
| // ^sql[query][$.limit(1) $.offset(2) $.default[n/a]] | |
| add_native_method("sql", Method::CT_STATIC, _sql, 1, 2); | |
| // ^string.replace[table] | |
| add_native_method("replace", Method::CT_DYNAMIC, _replace, 1, 1); | |
| // ^string.save[file] | |
| add_native_method("save", Method::CT_DYNAMIC, _save, 1, 2); | |
| // ^string.normalize[] | |
| add_native_method("normalize", Method::CT_DYNAMIC, _normalize, 0, 0); | |
| // ^string.trim[[start|both|end][;chars]] | |
| add_native_method("trim", Method::CT_DYNAMIC, _trim, 0, 2); | |
| } |