/** @file
	Parser: @b int parser class.

	Copyright (c) 2001-2003 ArtLebedev Group (http://www.artlebedev.com)
	Author: Alexandr Petrosian <paf@design.ru> (http://paf.design.ru)
*/

static const char* IDENT_INT_C="$Date: 2003/02/20 14:53:33 $";

#include "classes.h"
#include "pa_vmethod_frame.h"

#include "pa_request.h"
#include "pa_vdouble.h"
#include "pa_vint.h"

// externs

void _string_format(Request& r, StringPtr method_name, MethodParams* /*params*/);

// class

class MInt: public Methoded {
public:
	MInt();
public: // Methoded
	bool used_directly() { return true; }
};

// global variable

MethodedPtr int_class(new MInt);

// methods

static void _int(Request& r, StringPtr method_name, MethodParams* params) {
	// just checking (default) syntax validity, never really using it  here, just for string.int compatibility
	if(params->count()>0)
		params->as_junction(0, "default must be int");

	VInt& vint=*static_cast<VInt *>(r.get_self().get());
	r.write_no_lang(ValuePtr(new VInt(vint.get_int())));
}

static void _double(Request& r, StringPtr method_name, MethodParams* params) {
	// just checking (default) syntax validity, never really using it  here, just for string.doube compatibility
	if(params->count()>0)
		params->as_junction(0, "default must be double");

	VInt& vint=*static_cast<VInt *>(r.get_self().get());
	r.write_no_lang(ValuePtr(new VDouble(vint.as_double())));
}

typedef void (*vint_op_func_ptr)(VInt& vint, double param);

static void __inc(VInt& vint, double param) { vint.inc((int)param); }
static void __dec(VInt& vint, double param) { vint.inc((int)-param); }
static void __mul(VInt& vint, double param) { vint.mul(param); }
static void __div(VInt& vint, double param) { vint.div(param); }
static void __mod(VInt& vint, double param) { vint.mod((int)param); }

static void vint_op(Request& r, MethodParams* params, 
					 vint_op_func_ptr func) {
	VInt& vint=*static_cast<VInt *>(r.get_self().get());
	double param=params->count()?params->as_double(0, "param must be numerical", r):1;
	(*func)(vint, param);
}

static void _inc(Request& r, StringPtr /*method_name*/, MethodParams* params) { vint_op(r, params, &__inc); }
static void _dec(Request& r, StringPtr /*method_name*/, MethodParams* params) { vint_op(r, params, &__dec); }
static void _mul(Request& r, StringPtr /*method_name*/, MethodParams* params) { vint_op(r, params, &__mul); }
static void _div(Request& r, StringPtr /*method_name*/, MethodParams* params) { vint_op(r, params, &__div); }
static void _mod(Request& r, StringPtr /*method_name*/, MethodParams* params) { vint_op(r, params, &__mod); }

// from string.C
extern 
StringPtr sql_result_string(Request& r, StringPtr method_name, MethodParams* params,
							HashStringValue*& options, ValuePtr& default_code);
static void _sql(Request& r, StringPtr method_name, MethodParams* params) {
	int val;
	HashStringValue* options;
	ValuePtr default_code(0);
	if(StringPtr string=sql_result_string(r, method_name, params, options, default_code))
		val=string->as_int();
	else
		if(default_code)
			val=r.process_to_value(default_code)->as_int();
		else {
			throw Exception("parser.runtime",
				method_name,
				"produced no result, but no default option specified");
			val=0; //calm, compiler
		}
	r.write_no_lang(ValuePtr(new VInt(val)));
}

// constructor

MInt::MInt(): Methoded("int") {
	// ^int.int[]
	add_native_method("int", Method::CT_DYNAMIC, _int, 0, 1);

	// ^int.double[]
	add_native_method("double", Method::CT_DYNAMIC, _double, 0, 1);

	// ^int.inc[] 
	// ^int.inc[offset]
	add_native_method("inc", Method::CT_DYNAMIC, _inc, 0, 1);
	// ^int.dec[] 
	// ^int.dec[offset]
	add_native_method("dec", Method::CT_DYNAMIC, _dec, 0, 1);
	// ^int.mul[k] 
	add_native_method("mul", Method::CT_DYNAMIC, _mul, 1, 1);
	// ^int.div[d]
	add_native_method("div", Method::CT_DYNAMIC, _div, 1, 1);
	// ^int.mod[offset]
	add_native_method("mod", Method::CT_DYNAMIC, _mod, 1, 1);


	// ^int.format{format}
	add_native_method("format", Method::CT_DYNAMIC, _string_format, 1, 1);

	// ^sql[query]
	// ^sql[query][$.limit(1) $.offset(2) $.default(0)]
	add_native_method("sql", Method::CT_STATIC, _sql, 1, 2);
}