/*
 * $Id: StdAwk.cpp,v 1.11 2007/05/11 17:21:01 bacon Exp $
 */

#include <ase/awk/StdAwk.hpp>

#include <stdlib.h>
#include <math.h>
#include <time.h>

#ifdef _WIN32
#include <tchar.h>
#else
#include <wchar.h>
#endif

namespace ASE
{

	StdAwk::StdAwk ()
	{
		seed = ::time(NULL);
		::srand (seed);
	}

	int StdAwk::open ()
	{
		int n = Awk::open ();
		if (n == 0)
		{
			int opt = 
				ASE_AWK_IMPLICIT |
				ASE_AWK_EXPLICIT | 
				ASE_AWK_UNIQUEFN | 
				ASE_AWK_IDIV |
				ASE_AWK_SHADING | 
				ASE_AWK_SHIFT | 
				ASE_AWK_EXTIO | 
				ASE_AWK_BLOCKLESS | 
				ASE_AWK_STRBASEONE | 
				ASE_AWK_STRIPSPACES | 
				ASE_AWK_NEXTOFILE /*|
				ASE_AWK_ARGSTOMAIN*/;
			ase_awk_setoption (awk, opt);


			addFunction (ASE_T("sin"), 1, 1, (FunctionHandler)&StdAwk::sin);
			addFunction (ASE_T("cos"), 1, 1, (FunctionHandler)&StdAwk::cos);
			addFunction (ASE_T("tan"), 1, 1, (FunctionHandler)&StdAwk::tan);
			addFunction (ASE_T("atan2"), 2, 2, (FunctionHandler)&StdAwk::atan2);
			addFunction (ASE_T("log"), 1, 1, (FunctionHandler)&StdAwk::log);
			addFunction (ASE_T("exp"), 1, 1, (FunctionHandler)&StdAwk::exp);
			addFunction (ASE_T("sqrt"), 1, 1, (FunctionHandler)&StdAwk::sqrt);
			addFunction (ASE_T("int"), 1, 1, (FunctionHandler)&StdAwk::fnint);
			addFunction (ASE_T("rand"), 0, 0, (FunctionHandler)&StdAwk::rand);
			addFunction (ASE_T("srand"), 1, 1, (FunctionHandler)&StdAwk::srand);
			addFunction (ASE_T("systime"), 0, 0, (FunctionHandler)&StdAwk::systime);
			addFunction (ASE_T("strftime"), 0, 2, (FunctionHandler)&StdAwk::strftime);
			addFunction (ASE_T("strfgmtime"), 0, 2, (FunctionHandler)&StdAwk::strfgmtime);
			addFunction (ASE_T("system"), 1, 1, (FunctionHandler)&StdAwk::system);
		}

		return n;
	}

	int StdAwk::sin (Return* ret, const Argument* args, size_t nargs)
	{
		return ret->set ((real_t)::sin(args[0].toReal()));
	}

	int StdAwk::cos (Return* ret, const Argument* args, size_t nargs)
	{
		return ret->set ((real_t)::cos(args[0].toReal()));
	}

	int StdAwk::tan (Return* ret, const Argument* args, size_t nargs)
	{
		return ret->set ((real_t)::tan(args[0].toReal()));
	}

	int StdAwk::atan2 (Return* ret, const Argument* args, size_t nargs)
	{
		return ret->set ((real_t)::atan2(args[0].toReal(), args[1].toReal()));
	}

	int StdAwk::log (Return* ret, const Argument* args, size_t nargs)
	{
		return ret->set ((real_t)::log(args[0].toReal()));
	}

	int StdAwk::exp (Return* ret, const Argument* args, size_t nargs)
	{
		return ret->set ((real_t)::exp(args[0].toReal()));
	}

	int StdAwk::sqrt (Return* ret, const Argument* args, size_t nargs)
	{
		return ret->set ((real_t)::sqrt(args[0].toReal()));
	}

	int StdAwk::fnint (Return* ret, const Argument* args, size_t nargs)
	{
		return ret->set (args[0].toInt());
	}

	int StdAwk::rand (Return* ret, const Argument* args, size_t nargs)
	{
		return ret->set ((long_t)::rand());
	}

	int StdAwk::srand (Return* ret, const Argument* args, size_t nargs)
	{
		unsigned int prevSeed = seed;
		seed = (unsigned int)args[0].toInt();
		::srand (seed);
		return ret->set ((long_t)prevSeed);
	}

	int StdAwk::systime (Return* ret, const Argument* args, size_t nargs)
	{
		return ret->set ((long_t)::time(NULL));
	}

	int StdAwk::strftime (Return* ret, const Argument* args, size_t nargs)
	{
		const char_t* fmt;
		size_t fln;
	       
		fmt = (nargs < 1)? ASE_T("%c"): args[0].toStr(&fln);
		time_t t = (nargs < 2)? ::time(NULL): (time_t)args[1].toInt();

		char_t buf[128]; 
		struct tm* tm;
	#ifdef _WIN32
		tm = localtime (&t);
	#else
		struct tm tmb;
		tm = localtime_r (&t, &tmb);
	#endif

	#ifdef ASE_CHAR_IS_MCHAR
		size_t len = strftime (buf, ASE_COUNTOF(buf), fmt, tm);
	#else
		size_t len = wcsftime (buf, ASE_COUNTOF(buf), fmt, tm);
	#endif

		return ret->set (buf, len);	
	}

	int StdAwk::strfgmtime (Return* ret, const Argument* args, size_t nargs)
	{
		const char_t* fmt;
		size_t fln;
	       
		fmt = (nargs < 1)? ASE_T("%c"): args[0].toStr(&fln);
		time_t t = (nargs < 2)? ::time(NULL): (time_t)args[1].toInt();

		char_t buf[128]; 
		struct tm* tm;
	#ifdef _WIN32
		tm = gmtime (&t);
	#else
		struct tm tmb;
		tm = gmtime_r (&t, &tmb);
	#endif

	#ifdef ASE_CHAR_IS_MCHAR
		size_t len = strftime (buf, ASE_COUNTOF(buf), fmt, tm);
	#else
		size_t len = wcsftime (buf, ASE_COUNTOF(buf), fmt, tm);
	#endif

		return ret->set (buf, len);	
	}

	int StdAwk::system (Return* ret, const Argument* args, size_t nargs)
	{
		size_t len;
		const char_t* ptr = args[0].toStr(&len);

	#ifdef _WIN32
		return ret->set ((long_t)::_tsystem(ptr));
	#elif defined(ASE_CHAR_IS_MCHAR)
		return ret->set ((long_t)::system(ptr));
	#else
		char* mbs = (char*)ase_awk_malloc (ret->getAwk(), len*5+1);
		if (mbs == ASE_NULL) return -1;

		::size_t mbl = ::wcstombs (mbs, ptr, len*5);
		if (mbl == (::size_t)-1) return -1;
		mbs[mbl] = '\0';
		int n =  ret->set ((long_t)::system(mbs));

		ase_awk_free (ret->getAwk(), mbs);
		return n;
	#endif
	}
}