--- parser3/src/classes/string.C	2001/04/03 09:58:07	1.25
+++ parser3/src/classes/string.C	2001/10/09 07:06:00	1.78
@@ -2,201 +2,499 @@
 	Parser: @b string parser class.
 
 	Copyright (c) 2001 ArtLebedev Group (http://www.artlebedev.com)
-
 	Author: Alexander Petrosyan <paf@design.ru> (http://design.ru/paf)
 
-	$Id: string.C,v 1.25 2001/04/03 09:58:07 paf Exp $
+	$Id: string.C,v 1.78 2001/10/09 07:06:00 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"
-
-// global var
-
-VStateless_class *string_class;
+#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; }
+};
 
 // methods
 
-static void _length(Request& r, const String&, Array *) {
-	Pool& pool=r.pool();
-	Value& value=*new(pool) VDouble(pool, r.self->get_string()->size());
-	r.write_no_lang(value);
-}
-
-static void _int(Request& r, const String&, Array *) {
-	Pool& pool=r.pool();
-	Value& value=*new(pool) VInt(pool, (int)r.self->as_double());
-	r.write_no_lang(value);
-}
-
-static void _double(Request& r, const String&, Array *) {
+static void _length(Request& r, const String& method_name, MethodParams *) {
 	Pool& pool=r.pool();
-	Value& value=*new(pool) VDouble(pool, r.self->as_double());
-	r.write_no_lang(value);
+	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 *params) {
+	Pool& pool=r.pool();
+	bool convert_problem=false; Exception rethrow_me;
+	int converted;
+	PTRY {
+		converted=r.self->as_int();
+	}
+	PCATCH(e) { // convert problem
+		if(convert_problem=params->size()==0) { // we have a problem when do not have default
+			rethrow_me=e;  
+			converted=0;
+		} else
+			converted=params->as_int(0, "default must be int", r); // (default)
+	}
+	PEND_CATCH
+	if(convert_problem)
+		PTHROW(rethrow_me.type(), rethrow_me.code(), 
+			rethrow_me.problem_source(),
+			rethrow_me.comment());
+
+	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();
+	bool convert_problem=false; Exception rethrow_me;
+	double converted;
+	PTRY {
+		converted=r.self->as_double();
+	}
+	PCATCH(e) { // convert problem
+		if(convert_problem=params->size()==0) { // we have a problem when do not have default
+			rethrow_me=e;  
+			converted=0;
+		} else
+			converted=params->as_double(0, "default must be double", r); // (default)
+	}
+	PEND_CATCH
+	if(convert_problem)
+		PTHROW(rethrow_me.type(), rethrow_me.code(), 
+			rethrow_me.problem_source(),
+			rethrow_me.comment());
+
+	Value& result=*new(pool) VDouble(pool, converted);
+	result.set_name(method_name);
+	r.write_no_lang(result);
 }
 
-/// ^string.format{format}
-/*not static*/void _string_format(Request& r, const String& method_name, Array *params) {
+/*not static*/void _string_format(Request& r, const String& method_name, MethodParams *params) {
 	Pool& pool=r.pool();
 
-	Value& fmt=*static_cast<Value *>(params->get(0));
-	// forcing {this param type}
-	r.fail_if_junction_(false, fmt, method_name, "fmt must be junction");
+	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());
-	
-	r.write_no_lang(String(pool, buf));
+
+	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&, Array *params) {
+static void _left(Request& r, const String&, MethodParams *params) {
 	Pool& pool=r.pool();
 
-	size_t n=(size_t)r.process(*static_cast<Value *>(params->get(0))).as_double();
+	size_t n=(size_t)params->as_int(0, "n must be int", r);
 	
 	const String& string=*static_cast<VString *>(r.self)->get_string();
-	r.write_assign_lang(*new(pool) VString(string.piece(0, n)));
+	r.write_assign_lang(*new(pool) VString(string.mid(0, n)));
 }
 
-static void _right(Request& r, const String&, Array *params) {
+static void _right(Request& r, const String&, MethodParams *params) {
 	Pool& pool=r.pool();
 
-	size_t n=(size_t)r.process(*static_cast<Value *>(params->get(0))).as_double();
+	size_t n=(size_t)params->as_int(0, "n must be int", r);
 	
 	const String& string=*static_cast<VString *>(r.self)->get_string();
-	r.write_assign_lang(*new(pool) VString(string.piece(string.size()-n, string.size())));
+	r.write_assign_lang(*new(pool) VString(string.mid(string.size()-n, string.size())));
 }
 
-static void _mid(Request& r, const String&, Array *params) {
+static void _mid(Request& r, const String&, MethodParams *params) {
 	Pool& pool=r.pool();
 
-	size_t p=(size_t)r.process(*static_cast<Value *>(params->get(0))).as_double();
-	size_t n=(size_t)r.process(*static_cast<Value *>(params->get(1))).as_double();
+	size_t p=(size_t)params->as_int(0, "p must be int", r);
+	size_t n=(size_t)params->as_int(1, "n must be int", r);
 	
 	const String& string=*static_cast<VString *>(r.self)->get_string();
-	r.write_assign_lang(*new(pool) VString(string.piece(p, p+n)));
+	r.write_assign_lang(*new(pool) VString(string.mid(p, p+n)));
 }
 
-static void _pos(Request& r, const String& method_name, Array *params) {
+static void _pos(Request& r, const String& method_name, MethodParams *params) {
 	Pool& pool=r.pool();
 
-	Value& substr=*static_cast<Value *>(params->get(0));
-	// forcing [this param type]
-	r.fail_if_junction_(true, substr, method_name, "substr must not be junction");
+	Value& substr=params->as_no_junction(0, "substr must not be code");
 	
 	const String& string=*static_cast<VString *>(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, Array *params,
+static void split_list(Request& r, const String& method_name, MethodParams *params,
 					   const String& string, 
 					   Array& result) {
-	Pool& pool=r.pool();
-
-	Value& delim_value=*static_cast<Value *>(params->get(0));
-	// forcing [this param type]
-	r.fail_if_junction_(true, delim_value, method_name, "delimiter must not be junction");
+	Value& delim_value=params->as_no_junction(0, "delimiter must not be code");
 
-	string.split(result, 0, delim_value.as_string(), String::UL_CLEAN, -1);
+	string.split(result, 0, delim_value.as_string());
 }
 
-static void _lsplit(Request& r, const String& method_name, Array *params) {
+static void _lsplit(Request& r, const String& method_name, MethodParams *params) {
 	Pool& pool=r.pool();
 	const String& string=*static_cast<VString *>(r.self)->get_string();
 
-	Array& row=*new(pool) Array(pool);
-	split_list(r, method_name, params, string, row);
+	Array pieces(pool);
+	split_list(r, method_name, params, string, pieces);
 
-	Table& table=*new(pool) Table(pool, &string, 
-		0/*nameless*/, 1/*row preallocate(and only)*/);
-	table+=&row;
+	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, Array *params) {
+static void _rsplit(Request& r, const String& method_name, MethodParams *params) {
 	Pool& pool=r.pool();
 	const String& string=*static_cast<VString *>(r.self)->get_string();
 
-	Array list(pool);
-	split_list(r, method_name, params, string, list);
+	Array pieces(pool);
+	split_list(r, method_name, params, string, pieces);
 
-	Array& row=*new(pool) Array(pool);
-	for(int i=list.size(); --i>=0; )
-		row+=list.get(i);
+	Array& columns=*new(pool) Array(pool);
+	columns+=new(pool) String(pool, "piece");
 
 	Table& table=*new(pool) Table(pool, &string, 
-		0/*nameless*/, 1/*row preallocate(and only)*/);
-	table+=&row;
+		&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));
 }
 
-/// ^string.match{regexp}[options]
-static void _match(Request& r, const String& method_name, Array *params) {
-	Pool& pool=r.pool();
-	const String& string=*static_cast<VString *>(r.self)->get_string();
-
-	Value& regexp=*static_cast<Value *>(params->get(0));
-	// forcing {this param type}
-	r.fail_if_junction_(false, regexp, method_name, "regexp must be junction");
-
-	Value& options=*static_cast<Value *>(params->get(1));
-	// forcing {this param type}
-	r.fail_if_junction_(true, options, method_name, "options must not be junction");
+static void search_action(Table& table, Array *row, int, int, void *) {
+	if(row)
+		table+=row;
+}
+
+#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<Replace_action_info *>(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();
+	const String& src=*static_cast<VString *>(r.self)->get_string();
+
+	Value& regexp=params->as_no_junction(0, "regexp must not be code");
+
+	const String *options=
+		params->size()>1?
+		&params->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;
-	Value *result;
-	if(string.match(&method_name, 
-		r.process(regexp).as_string(), options.as_string(),
-		&table)) {
+	if(params->size()<3) { // search
+		bool was_global;
+		bool matched=src.match(r.pcre_tables(),
+			&method_name, 
+			regexp.as_string(), options,
+			&table,
+			search_action, 0,
+			&was_global);
 		// matched
-		if(table->columns()->size()==1) // just matched, no substrings
-			result=new(pool) VBool(pool, true);
-		else // table of match column+substring columns
-			result=new(pool) VTable(pool, table);
-	} else // not matched
-		result=new(pool) VBool(pool, false);
+		// 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 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();
+	const String& src=*static_cast<VString *>(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);
+}
+
+#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)
+			PTHROW(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)
+			PTHROW(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) {
+	Pool& pool=r.pool();
+
+	if(!r.connection)
+		PTHROW(0, 0,
+			&method_name,
+			"without connect");
+
+	Value& statement=params->as_junction(0, "statement must be code");
+
+	ulong limit=0;
+	ulong offset=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()) {
+				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();
+			} else
+				PTHROW(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);
+	String_sql_event_handlers handlers(pool, statement_string, statement_cstr);
+	bool need_rethrow=false; Exception rethrow_me;
+	PTRY {
+		r.connection->query(
+			statement_cstr, offset, limit, 
+			handlers);
+	}
+	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(!handlers.got_cell)
+		return 0; // no lines, caller should return second param[default value]
 
-	r.write_no_lang(*result);
+	return handlers.result;
 }
 
-// initialize
+static void _sql(Request& r, const String& method_name, MethodParams *params) {
+	Pool& pool=r.pool();
+
+	Hash *options;
+	const String *string=sql_result_string(r, method_name, params, options);
+	if(!string) {
+		if(options) {
+			if(Value *vdefault=(Value *)options->get(*sql_default_name)) {
+				if(!vdefault->get_junction())
+					PTHROW(0, 0,
+						&method_name,
+						"default option must be code");
+				string=r.process(*vdefault).get_string();
+				if(!string)
+					string=empty_string;
+			} else
+				PTHROW(0, 0,
+					&method_name,
+					"produced no result, but no default option specified");
+		} else
+			PTHROW(0, 0,
+				&method_name,
+				"produced no result, but no options (no default) 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<VString *>(r.self)->get_string();
+
+	Table *table=params->as_no_junction(0, "parameter must not be code").get_table();
+	if(!table)
+		PTHROW(0, 0,
+			&method_name,
+			"parameter must be table");
+
+	Dictionary dict(*table);
+	r.write_assign_lang(*new(pool) VString(src.replace(pool, dict)));
+}
+// constructor
+
+MString::MString(Pool& apool) : Methoded(apool) {
+	set_name(*NEW String(pool(), STRING_CLASS_NAME));
+
 
-void initialize_string_class(Pool& pool, VStateless_class& vclass) {
 	// ^string.length[]
-	vclass.add_native_method("length", Method::CT_DYNAMIC, _length, 0, 0);
+	add_native_method("length", Method::CT_DYNAMIC, _length, 0, 0);
 	
 	// ^string.int[]
-	vclass.add_native_method("int", Method::CT_DYNAMIC, _int, 0, 0);
-	
+	// ^string.int(default)
+	add_native_method("int", Method::CT_DYNAMIC, _int, 0, 1);
 	// ^string.double[]
-	vclass.add_native_method("double", Method::CT_DYNAMIC, _double, 0, 0);
+	// ^string.double(default)
+	add_native_method("double", Method::CT_DYNAMIC, _double, 0, 1);
 
 	// ^string.format{format}
-	vclass.add_native_method("format", Method::CT_DYNAMIC, _string_format, 1, 1);
+	add_native_method("format", Method::CT_DYNAMIC, _string_format, 1, 1);
 
 	// ^string.left(n)
-	vclass.add_native_method("left", Method::CT_DYNAMIC, _left, 1, 1);
+	add_native_method("left", Method::CT_DYNAMIC, _left, 1, 1);
 	// ^string.right(n)
-	vclass.add_native_method("right", Method::CT_DYNAMIC, _right, 1, 1);
+	add_native_method("right", Method::CT_DYNAMIC, _right, 1, 1);
 	// ^string.mid(p;n)
-	vclass.add_native_method("mid", Method::CT_DYNAMIC, _mid, 2, 2);
+	add_native_method("mid", Method::CT_DYNAMIC, _mid, 2, 2);
 
 	// ^string.pos[substr]
-	vclass.add_native_method("pos", Method::CT_DYNAMIC, _pos, 1, 1);
+	add_native_method("pos", Method::CT_DYNAMIC, _pos, 1, 1);
 
 	// ^string.lsplit[delim]
-	vclass.add_native_method("lsplit", Method::CT_DYNAMIC, _lsplit, 1, 1);
+	add_native_method("lsplit", Method::CT_DYNAMIC, _lsplit, 1, 1);
 	// ^string.rsplit[delim]
-	vclass.add_native_method("rsplit", Method::CT_DYNAMIC, _rsplit, 1, 1);
+	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.match{regexp}[options]
-	vclass.add_native_method("match", Method::CT_DYNAMIC, _match, 2, 2);
+	// ^string.replace[table]
+	add_native_method("replace", Method::CT_DYNAMIC, _replace, 1, 1);
 }	
 
+// global variable
+
+Methoded *string_class;
+
+// creator
+
+Methoded *MString_create(Pool& pool) {
+	return string_class=new(pool) MString(pool);
+}