--- parser3/src/classes/string.C	2001/03/29 17:34:26	1.20
+++ parser3/src/classes/string.C	2001/04/04 10:50:33	1.35
@@ -1,9 +1,11 @@
-/*
-	Parser
+/** @file
+	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 1.20 2001/03/29 17:34:26 paf Exp $
+	$Id: string.C,v 1.35 2001/04/04 10:50:33 paf Exp $
 */
 
 #include "pa_request.h"
@@ -11,6 +13,8 @@
 #include "pa_vdouble.h"
 #include "pa_vint.h"
 #include "pa_vtable.h"
+#include "pa_vbool.h"
+#include "pa_string.h"
 
 // global var
 
@@ -36,14 +40,16 @@ static void _double(Request& r, const St
 	r.write_no_lang(value);
 }
 
+/// ^string.format{format}
 /*not static*/void _string_format(Request& r, const String& method_name, Array *params) {
 	Pool& pool=r.pool();
 
 	Value& fmt=*static_cast<Value *>(params->get(0));
-	// forcing [this param type]
-	r.fail_if_junction_(true, fmt, method_name, "fmt must not be junction");
+	// forcing {this param type}
+	r.fail_if_junction_(false, fmt, method_name, "fmt must be junction");
 
-	char *buf=format(pool, r.self->as_double(), fmt.as_string().cstr());
+	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));
 }
@@ -54,7 +60,7 @@ static void _left(Request& r, const Stri
 	size_t n=(size_t)r.process(*static_cast<Value *>(params->get(0))).as_double();
 	
 	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) {
@@ -63,7 +69,7 @@ static void _right(Request& r, const Str
 	size_t n=(size_t)r.process(*static_cast<Value *>(params->get(0))).as_double();
 	
 	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) {
@@ -73,7 +79,7 @@ static void _mid(Request& r, const Strin
 	size_t n=(size_t)r.process(*static_cast<Value *>(params->get(1))).as_double();
 	
 	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) {
@@ -88,43 +94,27 @@ static void _pos(Request& r, const Strin
 }
 
 static void split_list(Request& r, const String& method_name, Array *params,
-					   const String& string, Array& list) {
+					   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");
-	const String& delim=delim_value.as_string();
-	
-	if(delim.size()) {
-		size_t pos_after=0;
-		int pos_before;
-		// while we have 'delim' in 'string'...
-		while((pos_before=string.pos(delim, pos_after))>=0) {
-			list+=&string.piece(pos_after, pos_before);
-			pos_after=pos_before+delim.size();
-		}
-		// last piece
-		if(pos_after<string.size()) 
-			list+=&string.piece(pos_after, string.size());
-	} else { // empty delim
-		list+=&string;
-	}
+
+	string.split(result, 0, delim_value.as_string(), String::UL_CLEAN, -1);
 }
 
 static void _lsplit(Request& r, const String& method_name, Array *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);
-	Table& table=*new(pool) Table(pool, &string, 0/*nameless*/);
+	Array& row=*new(pool) Array(pool);
+	split_list(r, method_name, params, string, row);
 
-	int size=list.size();
-	for(int i=0; i<size; i++) {
-		Array& row=*new(pool) Array(pool, 1/*row preallocate(and only)*/);
-		table+=&(row+=list.quick_get(i));
-	}
+	Table& table=*new(pool) Table(pool, &string, 
+		0/*nameless*/, 1/*row preallocate(and only)*/);
+	table+=&row;
 
 	r.write_no_lang(*new(pool) VTable(pool, &table));
 }
@@ -135,44 +125,152 @@ static void _rsplit(Request& r, const St
 
 	Array list(pool);
 	split_list(r, method_name, params, string, list);
-	Table& table=*new(pool) Table(pool, &string, 0/*nameless*/);
 
-	for(int i=list.size(); --i>=0; ) {
-		Array& row=*new(pool) Array(pool, 1/*row preallocate(and only)*/);
-		table+=&(row+=list.get(i));
-	}
+	Array& row=*new(pool) Array(pool);
+	for(int i=list.size(); --i>=0; )
+		row+=list.get(i);
+
+	Table& table=*new(pool) Table(pool, &string, 
+		0/*nameless*/, 1/*row preallocate(and only)*/);
+	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;
+}
+
+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<Replace_action_info *>(info);
+	if(row) { // begin&middle
+		// piece from last match['start'] to beginning of this match['finish']
+		if(start!=finish)
+			ai.dest->append(ai.src->mid(start, finish), String::UL_PASS_APPENDED);//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=junction->root=&vtable;
+			Value& replaced=ai.request->process(*ai.replacement_code, ai.origin, false);
+
+			/*
+			ai.dest->APPEND_CONST("(");
+				ai.dest->append(*(String *)row->get(1/*match* /), String::UL_PASS_APPENDED);
+			ai.dest->APPEND_CONST(")");
+			*/
+			ai.dest->append(replaced.as_string(), String::UL_PASS_APPENDED);
+		}
+		ai.post_match=(String *)row->get(2/*post_match*/);
+	} else // end
+		ai.dest->append(*ai.post_match, String::UL_PASS_APPENDED);
+}
+
+/** search/replace
+	^string.match[regexp][options]
+	^string.match[regexp][options]{replacement-code}
+*/
+static void _match(Request& r, const String& method_name, Array *params) {
+	Pool& pool=r.pool();
+	const String& src=*static_cast<VString *>(r.self)->get_string();
+
+	Value& regexp=*static_cast<Value *>(params->get(0));
+	// forcing [this param type]
+	r.fail_if_junction_(true, regexp, method_name, "regexp must not be junction");
+
+	const String *options=0;
+	if(params->size()>1) {
+		Value& value=*static_cast<Value *>(params->get(1));
+		// forcing {this param type}
+		r.fail_if_junction_(true, value, method_name, "options must not be junction");
+		options=&value.as_string();
+	}
+
+	Value *result;
+	Temp_lang temp_lang(r, String::UL_PASS_APPENDED);
+	Table *table;
+	if(params->size()<3) { // search
+		if(src.match(&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, true);
+			else // table of pre/match/post+substrings
+				result=new(pool) VTable(pool, table);
+		} else // not matched [not global]
+			result=new(pool) VBool(pool, false);
+	} else { // replace
+		Value& replacement_code=*static_cast<Value *>(params->get(2));
+		// forcing {this param type}
+		r.fail_if_junction_(false, replacement_code, 
+			method_name, "replacement code must be junction");
+
+		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);
+}
+
 // initialize
 
 void initialize_string_class(Pool& pool, VStateless_class& vclass) {
 	// ^string.length[]
-	vclass.add_native_method("length", _length, 0, 0);
+	vclass.add_native_method("length", Method::CT_DYNAMIC, _length, 0, 0);
 	
 	// ^string.int[]
-	vclass.add_native_method("int", _int, 0, 0);
+	vclass.add_native_method("int", Method::CT_DYNAMIC, _int, 0, 0);
 	
 	// ^string.double[]
-	vclass.add_native_method("double", _double, 0, 0);
+	vclass.add_native_method("double", Method::CT_DYNAMIC, _double, 0, 0);
 
-	// ^string.format[]
-	vclass.add_native_method("format", _string_format, 1, 1);
+	// ^string.format{format}
+	vclass.add_native_method("format", Method::CT_DYNAMIC, _string_format, 1, 1);
 
 	// ^string.left(n)
-	vclass.add_native_method("left", _left, 1, 1);
+	vclass.add_native_method("left", Method::CT_DYNAMIC, _left, 1, 1);
 	// ^string.right(n)
-	vclass.add_native_method("right", _right, 1, 1);
+	vclass.add_native_method("right", Method::CT_DYNAMIC, _right, 1, 1);
 	// ^string.mid(p;n)
-	vclass.add_native_method("mid", _mid, 2, 2);
+	vclass.add_native_method("mid", Method::CT_DYNAMIC, _mid, 2, 2);
 
 	// ^string.pos[substr]
-	vclass.add_native_method("pos", _pos, 1, 1);
+	vclass.add_native_method("pos", Method::CT_DYNAMIC, _pos, 1, 1);
 
 	// ^string.lsplit[delim]
-	vclass.add_native_method("lsplit", _lsplit, 1, 1);
+	vclass.add_native_method("lsplit", Method::CT_DYNAMIC, _lsplit, 1, 1);
 	// ^string.rsplit[delim]
-	vclass.add_native_method("rsplit", _rsplit, 1, 1);
+	vclass.add_native_method("rsplit", Method::CT_DYNAMIC, _rsplit, 1, 1);
+
+	// ^string.match[regexp][options]
+	// ^string.match[regexp][options]{replacement-code}
+	vclass.add_native_method("match", Method::CT_DYNAMIC, _match, 1, 3);
 }