--- parser3/src/classes/string.C 2001/03/12 22:21:01 1.9 +++ parser3/src/classes/string.C 2002/02/08 08:30:10 1.97 @@ -1,66 +1,509 @@ -/* - Parser - Copyright (c) 2001 ArtLebedev Group (http://www.artlebedev.com) - Author: Alexander Petrosyan (http://design.ru/paf) +/** @file + Parser: @b string parser class. - $Id: string.C,v 1.9 2001/03/12 22:21:01 paf Exp $ + Copyright (c) 2001, 2002 ArtLebedev Group (http://www.artlebedev.com) + Author: Alexandr Petrosian (http://paf.design.ru) + + $Id: string.C,v 1.97 2002/02/08 08:30:10 paf 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" +#include "pa_dictionary.h" + +// defines + +#define STRING_CLASS_NAME "string" + +// class + +class MString : public Methoded { +public: + MString(Pool& pool); +public: // Methoded + bool used_directly() { return true; } +}; -// global var +// methods -VClass *string_class; +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); +} -// methods +static void _int(Request& r, const String& method_name, MethodParams *params) { + Pool& pool=r.pool(); + int converted; + Value *default_code=params->size()>0? + default_code=¶ms->as_junction(0, "default must be int"):0; // (default) + try { + converted=r.self->as_int(); + } catch(...) { // convert problem + if(!default_code) // we have a problem when no default + /*re*/throw; + else + converted=r.process(*default_code).as_int(); + } + + Value& result=*new(pool) VInt(pool, converted); + result.set_name(method_name); + r.write_no_lang(result); +} + +static void _double(Request& r, const String& method_name, MethodParams *params) { + Pool& pool=r.pool(); + double converted; + Value *default_code=params->size()>0? + default_code=¶ms->as_junction(0, "default must be double"):0; // (default) + try { + converted=r.self->as_double(); + } catch(...) { // convert problem + if(!default_code) // we have a problem when no default + /*re*/throw; + else + converted=r.process(*default_code).as_double(); + } + + Value& result=*new(pool) VDouble(pool, converted); + 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_maybe_code=params->get(0); + // for some time due to stupid {} in original design + const String& fmt= + (fmt_maybe_code.get_junction()?r.process(fmt_maybe_code):fmt_maybe_code).as_string(); + + char *buf=format(pool, r.self->as_double(), fmt.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)params->as_int(0, "n must be int", r); + + 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)params->as_int(0, "n must be int", r); + + 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(); + + const String& string=*static_cast(r.self)->get_string(); + + size_t p=(size_t)params->as_int(0, "p must be int", r); + size_t n=params->size()>1? + (size_t)params->as_int(1, "n must be int", r):string.size(); + + 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(); -static void _length(Request& r, const String&, Array *) { + 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()); + Array_iter i(pieces); + while(i.has_next()) { + Array& row=*new(pool) Array(pool); + row+=i.next(); + table+=&row; + } + r.write_no_lang(*new(pool) VTable(pool, &table)); +} + +static void _rsplit(Request& r, const String& method_name, MethodParams *params) { 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& 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()); + 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; } -static void _int(Request& r, const String&, Array *) { +#ifndef DOXYGEN +struct Replace_action_info { + Request *request; const String *origin; + const String *src; String *dest; + Value *replacement_code; + const String *post_match; +}; +#endif +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(); + Value *saved_match_var_value=junction->root->get_element(*match_var_name); + junction->root->put_element(*match_var_name, &vtable); + Value& replaced=ai.request->process(*ai.replacement_code, ai.origin, false); + junction->root->put_element(*match_var_name, saved_match_var_value); + + /* + 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(); - Value& value=*new(pool) VInt(pool, (int)r.self->get_double()); - r.wcontext->write(value, String::Untaint_lang::NO /*always object, not string*/); + 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 was_global; + bool matched=src.match( + &method_name, + regexp.as_string(), options, + &table, + search_action, 0, + &was_global); + // matched + // not (just matched[3=pre/match/post], no substrings) or Global search + if(table->columns()->size()>3 || was_global) + result=new(pool) VTable(pool, table); // table of pre/match/post+substrings + else + result=new(pool) VBool(pool, matched); + } else { // replace + Value& replacement_code=params->as_junction(2, "replacement param 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( + &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 _double(Request& r, const String&, Array *) { +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->get_double()); - 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, + 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); } -void _string_format(Request& r, const String& method_name, Array *params) { +#ifndef DOXYGEN +class String_sql_event_handlers : public SQL_Driver_query_event_handlers { +public: + String_sql_event_handlers(Pool& apool, + const String& astatement_string, const char *astatement_cstr) : + pool(apool), + statement_string(astatement_string), + statement_cstr(astatement_cstr), + got_column(false), got_cell(false) { + result=new(pool) String(pool); + } + + void add_column(void *ptr, size_t size) { + if(got_column) + throw Exception(0, 0, + &statement_string, + "result must contain exactly one column"); + got_column=true; + } + void before_rows() { /* ignore */ } + void add_row() { /* ignore */ } + void add_row_cell(void *ptr, size_t size) { + if(got_cell) + throw Exception(0, 0, + &statement_string, + "result must not contain more then one row"); + got_cell=true; + + result->APPEND_TAINTED((const char *)ptr, size, statement_cstr, 0); + } + +private: + Pool& pool; + const String& statement_string; const char *statement_cstr; + bool got_column; +public: + bool got_cell; + String *result; +}; +#endif +const String* sql_result_string(Request& r, const String& method_name, MethodParams *params, + Hash *& options, Value *& default_code) { Pool& pool=r.pool(); - Value& fmt=*static_cast(params->get(0)); - // forcing ^format[this param type] - r.fail_if_junction_(true, fmt, - method_name, "fmt must not be junction"); + Value& statement=params->as_junction(0, "statement must be code"); - char *buf=format(pool, r.self->get_double(), fmt.as_string().cstr()); + ulong limit=0; + ulong offset=0; + default_code=0; + if(params->size()>1) { + Value& voptions=params->as_no_junction(1, "options must be hash, not code"); + if(voptions.is_defined()) + if(options=voptions.get_hash(&method_name)) { + if(Value *vlimit=(Value *)options->get(*sql_limit_name)) + limit=(ulong)r.process(*vlimit).as_double(); + if(Value *voffset=(Value *)options->get(*sql_offset_name)) + offset=(ulong)r.process(*voffset).as_double(); + if(default_code=(Value *)options->get(*sql_default_name)) { + if(!default_code->get_junction()) + throw Exception(0, 0, + &method_name, + "default option must be code"); + } + } else + throw Exception(0, 0, + &method_name, + "options must be hash"); + } else + options=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(&method_name)); + String_sql_event_handlers handlers(pool, statement_string, statement_cstr); + try { + r.connection(&method_name)->query( + statement_cstr, offset, limit, + handlers); + } catch(const Exception& e) { // query problem + // give more specific source [were url] + throw Exception(e.type(), e.code(), + &statement_string, + "%s", e.comment()); + } - String *string=new(pool) String(pool); - r.wcontext->write(string->APPEND_CONST(buf), - String::Untaint_lang::NO /*always object, not string*/); + if(!handlers.got_cell) + return 0; // no lines, caller should return second param[default value] + + return handlers.result; +} + +static void _sql(Request& r, const String& method_name, MethodParams *params) { + Pool& pool=r.pool(); + + Hash *options; + Value *default_code; + const String *string=sql_result_string(r, method_name, params, options, default_code); + if(!string) { + if(default_code) { + string=r.process(*default_code).get_string(); + if(!string) + string=new(pool) String(pool); + } else + throw Exception(0, 0, + &method_name, + "produced no result, but no default option specified"); + } + VString& result=*new(pool) VString(*string); + result.set_name(method_name); + r.write_assign_lang(result); +} + +static void _replace(Request& r, const String& method_name, MethodParams *params) { + Pool& pool=r.pool(); + const String& src=*static_cast(r.self)->get_string(); + + Table *table=params->as_no_junction(0, "parameter must not be code").get_table(); + if(!table) + throw Exception(0, 0, + &method_name, + "parameter must be table"); + + Dictionary dict(*table); + r.write_assign_lang(*new(pool) VString(src.replace(pool, dict))); } -void initialize_string_class(Pool& pool, VClass& vclass) { +static void _save(Request& r, const String& method_name, MethodParams *params) { + const String& file_name=params->as_string(params->size()-1, + "file name must be string"); + + const String& src=*static_cast(r.self)->get_string(); + + bool do_append=false; + if(params->size()>1) { + const String& mode=params->as_string(0, "mode must be string"); + if(mode=="append") + do_append=true; + else + throw Exception(0, 0, + &mode, + "unknown mode, must be 'append'"); + } + + // write + const char *buf=src.cstr(String::UL_UNSPECIFIED); + file_write(r.absolute(file_name), + buf, strlen(buf), true, do_append); +} + +// 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); - + // ^string.int(default) + add_native_method("int", Method::CT_DYNAMIC, _int, 0, 1); // ^string.double[] - vclass.add_native_method("double", _double, 0, 0); + // ^string.double(default) + add_native_method("double", Method::CT_DYNAMIC, _double, 0, 1); + + // ^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, 1, 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); + + // ^sql[query] + // ^sql[query][$.limit(1) $.offset(2) $.default[n/a]] + add_native_method("sql", Method::CT_STATIC, _sql, 1, 2); - // ^string.format[] - vclass.add_native_method("format", _string_format, 1, 1); + // ^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); } +// global variable + +Methoded *string_class; + +// creator + +Methoded *MString_create(Pool& pool) { + return string_class=new(pool) MString(pool); +}