#include <stdio.h>
#include <stdlib.h>
#include <pgtypes_numeric.h>
#include <pgtypes_error.h>
#include <decimal.h>
#include <sqltypes.h>

exec sql include ../regression;

exec sql include ../printf_hack;


/*
TODO:
	deccmp => DECUNKNOWN
	decimal point: , and/or . ?
	ECPG_INFORMIX_BAD_EXPONENT ?
*/

char* decs[] = { "2E394", "-2", ".794", "3.44", "592.49E21", "-32.84e4",
				 "2E-394", ".1E-2", "+.0", "-592.49E-07", "+32.84e-4",
				 ".500001", "-.5000001",
				 "1234567890123456789012345678.91", /* 30 digits should fit
				                                       into decimal */
				 "1234567890123456789012345678.921", /* 31 digits should NOT
				                                        fit into decimal */
				 "not a number",
				 NULL};


static void
check_errno(void);

#define BUFSIZE 200

int
main(void)
{
	decimal *dec, *din;
	char buf[BUFSIZE];
	long l;
	int i, j, k, q, r, count = 0;
	double dbl;
	decimal **decarr = (decimal **) calloc(1, sizeof(decimal));

	ECPGdebug(1, stderr);

	for (i = 0; decs[i]; i++)
	{
		dec = PGTYPESdecimal_new();
		r = deccvasc(decs[i], strlen(decs[i]), dec);
		if (r)
		{
			check_errno();
			printf("dec[%d,0]: r: %d\n", i, r);
			PGTYPESdecimal_free(dec);
			continue;
		}
		decarr = realloc(decarr, sizeof(decimal *) * (count + 1));
		decarr[count++] = dec;

		r = dectoasc(dec, buf, BUFSIZE-1, -1);
		if (r < 0) check_errno();
		printf("dec[%d,1]: r: %d, %s\n", i, r, buf);

		r = dectoasc(dec, buf, BUFSIZE-1, 0);
		if (r < 0) check_errno();
		printf("dec[%d,2]: r: %d, %s\n", i, r, buf);
		r = dectoasc(dec, buf, BUFSIZE-1, 1);
		if (r < 0) check_errno();
		printf("dec[%d,3]: r: %d, %s\n", i, r, buf);
		r = dectoasc(dec, buf, BUFSIZE-1, 2);
		if (r < 0) check_errno();
		printf("dec[%d,4]: r: %d, %s\n", i, r, buf);

		din = PGTYPESdecimal_new();
		r = dectoasc(din, buf, BUFSIZE-1, 2);
		if (r < 0) check_errno();
		printf("dec[%d,5]: r: %d, %s\n", i, r, buf);

		r = dectolong(dec, &l);
		if (r) check_errno();
		printf("dec[%d,6]: %ld (r: %d)\n", i, r?0L:l, r);
		if (r == 0)
		{
			r = deccvlong(l, din);
			if (r) check_errno();
			dectoasc(din, buf, BUFSIZE-1, 2);
			q = deccmp(dec, din);
			printf("dec[%d,7]: %s (r: %d - cmp: %d)\n", i, buf, r, q);
		}

		r = dectoint(dec, &k);
		if (r) check_errno();
		printf("dec[%d,8]: %d (r: %d)\n", i, r?0:k, r);
		if (r == 0)
		{
			r = deccvint(k, din);
			if (r) check_errno();
			dectoasc(din, buf, BUFSIZE-1, 2);
			q = deccmp(dec, din);
			printf("dec[%d,9]: %s (r: %d - cmp: %d)\n", i, buf, r, q);
		}

		if (i != 6)
		{
			/* underflow does not work reliable on several archs, so not testing it here */
			/* this is a libc problem since we only call strtod() */
			r = dectodbl(dec, &dbl);
			if (r) check_errno();
			printf("dec[%d,10]: ", i);
			print_double(r ? 0.0 : dbl);
			printf(" (r: %d)\n", r);
		}

		PGTYPESdecimal_free(din);
		printf("\n");
	}

	/* add a NULL value */
	dec = PGTYPESdecimal_new();
	decarr = realloc(decarr, sizeof(decimal *) * (count + 1));
	decarr[count++] = dec;

	rsetnull(CDECIMALTYPE, (char *) decarr[count-1]);
	printf("dec[%d]: %sNULL\n", count-1,
		risnull(CDECIMALTYPE, (char *) decarr[count-1]) ? "" : "NOT ");
	printf("dec[0]: %sNULL\n",
		risnull(CDECIMALTYPE, (char *) decarr[0]) ? "" : "NOT ");

	r = dectoasc(decarr[3], buf, -1, -1);
	check_errno(); printf("dectoasc with len == -1: r: %d\n", r);
	r = dectoasc(decarr[3], buf, 0, -1);
	check_errno(); printf("dectoasc with len == 0: r: %d\n", r);

	for (i = 0; i < count; i++)
	{
		for (j = 0; j < count; j++)
		{
			decimal a, s, m, d;
			int c;
			c = deccmp(decarr[i], decarr[j]);
			printf("dec[c,%d,%d]: %d\n", i, j, c);

			r = decadd(decarr[i], decarr[j], &a);
			if (r)
			{
				check_errno();
				printf("r: %d\n", r);
			}
			else
			{
				dectoasc(&a, buf, BUFSIZE-1, -1);
				printf("dec[a,%d,%d]: %s\n", i, j, buf);
			}

			r = decsub(decarr[i], decarr[j], &s);
			if (r)
			{
				check_errno();
				printf("r: %d\n", r);
			}
			else
			{
				dectoasc(&s, buf, BUFSIZE-1, -1);
				printf("dec[s,%d,%d]: %s\n", i, j, buf);
			}

			r = decmul(decarr[i], decarr[j], &m);
			if (r)
			{
				check_errno();
				printf("r: %d\n", r);
			}
			else
			{
				dectoasc(&m, buf, BUFSIZE-1, -1);
				printf("dec[m,%d,%d]: %s\n", i, j, buf);
			}

			r = decdiv(decarr[i], decarr[j], &d);
			if (r)
			{
				check_errno();
				printf("r: %d\n", r);
			}
			else
			{
				dectoasc(&d, buf, BUFSIZE-1, -1);
				printf("dec[d,%d,%d]: %s\n", i, j, buf);
			}
		}
	}

	for (i = 0; i < count; i++)
	{
		dectoasc(decarr[i], buf, BUFSIZE-1, -1);
		printf("%d: %s\n", i, buf);

		PGTYPESdecimal_free(decarr[i]);
	}
	free(decarr);

	return 0;
}

static void
check_errno(void)
{
	switch(errno)
	{
		case 0:
			printf("(no errno set) - ");
			break;
		case ECPG_INFORMIX_NUM_OVERFLOW:
			printf("(errno == ECPG_INFORMIX_NUM_OVERFLOW) - ");
			break;
		case ECPG_INFORMIX_NUM_UNDERFLOW:
			printf("(errno == ECPG_INFORMIX_NUM_UNDERFLOW) - ");
			break;
		case PGTYPES_NUM_OVERFLOW:
			printf("(errno == PGTYPES_NUM_OVERFLOW) - ");
			break;
		case PGTYPES_NUM_UNDERFLOW:
			printf("(errno == PGTYPES_NUM_UNDERFLOW) - ");
			break;
		case PGTYPES_NUM_BAD_NUMERIC:
			printf("(errno == PGTYPES_NUM_BAD_NUMERIC) - ");
			break;
		case PGTYPES_NUM_DIVIDE_ZERO:
			printf("(errno == PGTYPES_NUM_DIVIDE_ZERO) - ");
			break;
		default:
			printf("(unknown errno (%d))\n", errno);
			printf("(libc: (%s)) ", strerror(errno));
			break;
	}
}