--- parser3/src/classes/string.C 2001/03/11 12:04:43 1.6 +++ parser3/src/classes/string.C 2001/07/18 10:06:04 1.63 @@ -1,48 +1,391 @@ -/* - Parser +/** @file + Parser: @b string parser class. + Copyright (c) 2001 ArtLebedev Group (http://www.artlebedev.com) - Author: Alexander Petrosyan (http://design.ru/paf) - $Id: string.C,v 1.6 2001/03/11 12:04:43 paf Exp $ + Author: Alexander Petrosyan (http://design.ru/paf) */ +static const char *RCSId="$Id: string.C,v 1.63 2001/07/18 10:06:04 parser Exp $"; +#include "classes.h" #include "pa_request.h" -#include "_string.h" #include "pa_vdouble.h" #include "pa_vint.h" +#include "pa_vtable.h" +#include "pa_vbool.h" +#include "pa_string.h" +#include "pa_sql_connection.h" -// global var +// defines -VClass *string_class; +#define STRING_CLASS_NAME "string" + +// class + +class MString : public Methoded { +public: + MString(Pool& pool); +public: // Methoded + bool used_directly() { return true; } +}; // methods -static void _length(Request& r, Array *) { +static void _length(Request& r, const String& method_name, MethodParams *) { + Pool& pool=r.pool(); + Value& result=*new(pool) VDouble(pool, r.self->get_string()->size()); + result.set_name(method_name); + r.write_no_lang(result); +} + +static void _int(Request& r, const String& method_name, MethodParams *) { + Pool& pool=r.pool(); + Value& result=*new(pool) VInt(pool, r.self->as_int()); + result.set_name(method_name); + r.write_no_lang(result); +} + +static void _double(Request& r, const String& method_name, MethodParams *) { + Pool& pool=r.pool(); + Value& result=*new(pool) VDouble(pool, r.self->as_double()); + result.set_name(method_name); + r.write_no_lang(result); +} + +/*not static*/void _string_format(Request& r, const String& method_name, MethodParams *params) { + Pool& pool=r.pool(); + + Value& fmt=params->as_junction(0, "fmt must be code"); + + Temp_lang temp_lang(r, String::UL_PASS_APPENDED); + char *buf=format(pool, r.self->as_double(), r.process(fmt).as_string().cstr()); + + String result(pool); + result.APPEND_CLEAN(buf, 0, + method_name.origin().file, + method_name.origin().line); + r.write_no_lang(result); +} + +static void _left(Request& r, const String&, MethodParams *params) { + Pool& pool=r.pool(); + + size_t n=(size_t)r.process(params->get(0)).as_double(); + + const String& string=*static_cast(r.self)->get_string(); + r.write_assign_lang(*new(pool) VString(string.mid(0, n))); +} + +static void _right(Request& r, const String&, MethodParams *params) { + Pool& pool=r.pool(); + + size_t n=(size_t)r.process(params->get(0)).as_double(); + + const String& string=*static_cast(r.self)->get_string(); + r.write_assign_lang(*new(pool) VString(string.mid(string.size()-n, string.size()))); +} + +static void _mid(Request& r, const String&, MethodParams *params) { + Pool& pool=r.pool(); + + size_t p=(size_t)r.process(params->get(0)).as_double(); + size_t n=(size_t)r.process(params->get(1)).as_double(); + + const String& string=*static_cast(r.self)->get_string(); + r.write_assign_lang(*new(pool) VString(string.mid(p, p+n))); +} + +static void _pos(Request& r, const String& method_name, MethodParams *params) { + Pool& pool=r.pool(); + + Value& substr=params->as_no_junction(0, "substr must not be code"); + + const String& string=*static_cast(r.self)->get_string(); + r.write_assign_lang(*new(pool) VInt(pool, string.pos(substr.as_string()))); +} + +static void split_list(Request& r, const String& method_name, MethodParams *params, + const String& string, + Array& result) { + Value& delim_value=params->as_no_junction(0, "delimiter must not be code"); + + string.split(result, 0, delim_value.as_string()); +} + +static void _lsplit(Request& r, const String& method_name, MethodParams *params) { + Pool& pool=r.pool(); + const String& string=*static_cast(r.self)->get_string(); + + Array pieces(pool); + split_list(r, method_name, params, string, pieces); + + Array& columns=*new(pool) Array(pool); + columns+=new(pool) String(pool, "piece"); + + Table& table=*new(pool) Table(pool, &string, + &columns, pieces.size()); + int size=pieces.quick_size(); + for(int i=0; i(r.self)->get_string(); + + Array pieces(pool); + split_list(r, method_name, params, string, pieces); + + Array& columns=*new(pool) Array(pool); + columns+=new(pool) String(pool, "piece"); + + Table& table=*new(pool) Table(pool, &string, + &columns, pieces.size()); + for(int i=pieces.size(); --i>=0; ) { + Array& row=*new(pool) Array(pool); + row+=pieces.get(i); + table+=&row; + } + + r.write_no_lang(*new(pool) VTable(pool, &table)); +} + +static void search_action(Table& table, Array *row, int, int, void *) { + if(row) + table+=row; +} + +/// used by string: _match / replace_action +struct Replace_action_info { + Request *request; const String *origin; + const String *src; String *dest; + Value *replacement_code; + const String *post_match; +}; +static void replace_action(Table& table, Array *row, int start, int finish, + void *info) { + Replace_action_info& ai=*static_cast(info); + if(row) { // begin&middle + // piece from last match['start'] to beginning of this match['finish'] + if(start!=finish) + *ai.dest << ai.src->mid(start, finish);//ai.dest->APPEND_CONST("-"); + // store found parts in one-record VTable + if(table.size()) // middle + table.put(0, row); + else // begin + table+=row; + { // execute 'replacement_code' in 'table' context + VTable& vtable=*new(table.pool()) VTable(table.pool(), &table); + vtable.set_name(*ai.origin); + + Junction *junction=ai.replacement_code->get_junction(); + junction->rcontext=/*must be some way to get to + outside world junction->root=*/&vtable; + Value& replaced=ai.request->process(*ai.replacement_code, ai.origin, false); + + /* + ai.dest->APPEND_CONST("("); + *ai.dest << *(String *)row->get(1/*match* /); + ai.dest->APPEND_CONST(")"); + */ + *ai.dest << replaced.as_string(); + } + ai.post_match=(String *)row->get(2/*post_match*/); + } else // end + *ai.dest << *ai.post_match; +} + +/// @todo use pcre:study somehow +static void _match(Request& r, const String& method_name, MethodParams *params) { + Pool& pool=r.pool(); + const String& src=*static_cast(r.self)->get_string(); + + Value& regexp=params->as_no_junction(0, "regexp must not be code"); + + const String *options= + params->size()>1? + ¶ms->as_no_junction(1, "options must not be code").as_string():0; + + Value *result; + Temp_lang temp_lang(r, String::UL_PASS_APPENDED); + Table *table; + if(params->size()<3) { // search + bool matched=src.match(r.pcre_tables, + &method_name, + regexp.as_string(), options, + &table, + search_action, 0); + // matched + if(table->columns()->size()==3 && // just matched[3=pre/match/post], no substrings + table->size()<=1) // just one row, not /g_lobal search + result=new(pool) VBool(pool, matched); + else // table of pre/match/post+substrings + result=new(pool) VTable(pool, table); + } else { // replace + Value& replacement_code=params->as_junction(2, "replacement code must be code"); + + String& dest=*new(pool) String(pool); + Replace_action_info replace_action_info={ + &r, &method_name, + &src, &dest, + &replacement_code, + &src + }; + src.match(r.pcre_tables, + &method_name, + r.process(regexp).as_string(), options, + &table, + replace_action, &replace_action_info); + result=new(pool) VString(dest); + } + result->set_name(method_name); + r.write_assign_lang(*result); +} + +static void change_case(Request& r, const String& method_name, MethodParams *params, + String::Change_case_kind kind) { Pool& pool=r.pool(); - Value& value=*new(pool) VDouble(pool, r.self->as_string().size()); - r.wcontext->write(value, String::Untaint_lang::NO /*always object, not string*/); + const String& src=*static_cast(r.self)->get_string(); + + r.write_assign_lang(*new(pool) VString(src.change_case(pool, r.pcre_tables, + kind))); +} +static void _upper(Request& r, const String& method_name, MethodParams *params) { + change_case(r, method_name, params, String::CC_UPPER); +} +static void _lower(Request& r, const String& method_name, MethodParams *params) { + change_case(r, method_name, params, String::CC_LOWER); } -static void _int(Request& r, Array *) { +const String* sql_result_string(Request& r, const String& method_name, MethodParams *params) { Pool& pool=r.pool(); - Value& value=*new(pool) VInt(pool, static_cast(r.self->get_double())); - r.wcontext->write(value, String::Untaint_lang::NO /*always object, not string*/); + + if(!r.connection) + PTHROW(0, 0, + &method_name, + "without connect"); + + Value& statement=params->as_junction(0, "statement must be code"); + + ulong offset=(ulong)(params->size()>2?params->as_int(2, r):0); + + Temp_lang temp_lang(r, String::UL_SQL); + const String& statement_string=r.process(statement).as_string(); + const char *statement_cstr= + statement_string.cstr(String::UL_UNSPECIFIED, r.connection); + unsigned int sql_column_count; SQL_Driver::Cell *sql_columns; + unsigned long sql_row_count; SQL_Driver::Cell **sql_rows; + bool need_rethrow=false; Exception rethrow_me; + PTRY { + r.connection->query( + statement_cstr, offset, 0, + &sql_column_count, &sql_columns, + &sql_row_count, &sql_rows); + } + PCATCH(e) { // query problem + rethrow_me=e; need_rethrow=true; + } + PEND_CATCH + if(need_rethrow) + PTHROW(rethrow_me.type(), rethrow_me.code(), + &statement_string, // setting more specific source [were url] + rethrow_me.comment()); + + if(sql_column_count!=1) + PTHROW(0, 0, + &statement_string, + "result must contain exactly one column"); + + if(!sql_row_count) + return 0; // no lines, should return second param[default value] + + if(sql_row_count>1) + PTHROW(0, 0, + &statement_string, + "result must not contain more then one row"); + + String *result=new(pool) String(pool); + SQL_Driver::Cell& cell=sql_rows[0][0]; + result->APPEND_TAINTED( + (const char *)cell.ptr, cell.size, + statement_cstr, 0); + + return result; } -static void _double(Request& r, Array *) { +static void _sql(Request& r, const String& method_name, MethodParams *params) { Pool& pool=r.pool(); - Value& value=*new(pool) VDouble(pool, r.self->get_double()); - r.wcontext->write(value, String::Untaint_lang::NO /*always object, not string*/); + + const String *string=sql_result_string(r, method_name, params); + if(!string) { + Value& default_code=params->as_junction(1, "default result must code"); + Value& processed_code=r.process(default_code); + string=processed_code.get_string(); + if(!string) + string=empty_string; + } + VString& result=*new(pool) VString(*string); + result.set_name(method_name); + r.write_assign_lang(result); } -void initialize_string_class(Pool& pool, VClass& vclass) { +// constructor + +MString::MString(Pool& apool) : Methoded(apool) { + set_name(*NEW String(pool(), STRING_CLASS_NAME)); + + // ^string.length[] - vclass.add_native_method("length", _length, 0, 0); + add_native_method("length", Method::CT_DYNAMIC, _length, 0, 0); // ^string.int[] - vclass.add_native_method("int", _int, 0, 0); + add_native_method("int", Method::CT_DYNAMIC, _int, 0, 0); // ^string.double[] - vclass.add_native_method("double", _double, 0, 0); + add_native_method("double", Method::CT_DYNAMIC, _double, 0, 0); + + // ^string.format{format} + add_native_method("format", Method::CT_DYNAMIC, _string_format, 1, 1); + + // ^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, 2, 2); + + // ^string.pos[substr] + add_native_method("pos", Method::CT_DYNAMIC, _pos, 1, 1); + + // ^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); + + // ^string:sql[query]{default} + // ^string:sql[query]{default}(offset) + add_native_method("sql", Method::CT_STATIC, _sql, 2, 3); } +// global variable + +Methoded *string_class; + +// creator + +Methoded *MString_create(Pool& pool) { + return string_class=new(pool) MString(pool); +}