/*
 *	Copyright 1996, University Corporation for Atmospheric Research
 *	See netcdf/COPYRIGHT file for copying and redistribution conditions.
 */
/* $Id: t_ncx.c,v 1.43 1996/11/18 23:22:09 steve Exp $ */

#include <stdio.h>
#include <limits.h>
/* alias poorly named limits.h macros */
#define  SHORT_MAX  SHRT_MAX
#define  SHORT_MIN  SHRT_MIN
#define USHORT_MAX USHRT_MAX
#include <rpc/types.h>
#include <rpc/xdr.h>
#include <string.h>
#include "ncx.h"

#define NO_UNSIGNED
#define NO_UNSIGNED_LONG

/*
 * This program tests the xdr_mem implementation and
 * the ncx_ implementation, and compares the two.
 * Link like this: 
 * cc t_ncx.c ncx.o [-lsome_xdr_lib] -o t_nxc
 * Successful output is:
	xdr_encode ends at byte 640
	xdr_check  ends at byte 640
	ncx_encode ends at byte 640
	ncx_check  ends at byte 640
	xdr_check  ends at byte 640
	ncx_check  ends at byte 640
 * with exit status 0;
 */

#define XBSZ 1024

char xdrb[XBSZ];
char ncxb[XBSZ];

#define ArraySize(thang) (sizeof(thang)/sizeof(thang[0]))
#define uiArraySize(thang) ((u_int)ArraySize(thang))
#define eSizeOf(thang) ((u_int)(sizeof(thang[0])))

/*
 * Some test data
 */

static char text[] = { "Hiya sailor. New in town?" };

/*
 * Some test data
 * The ideas is that ncx_putn_type_type(...., types)
 * should not return NC_ERANGE.
 */

#if SCHAR_MAX == X_SCHAR_MAX && SCHAR_MIN == X_SCHAR_MIN
static schar schars[] = {
	SCHAR_MIN, SCHAR_MIN +1,
	-1, 0, 1,
	SCHAR_MAX - 1, SCHAR_MAX
};
#else
/* The implementation and this test assume 8 bit bytes. */
#error "Not 8 bit bytes ??"
#endif

static short shorts[] = {
#if SHORT_MAX <= X_SHORT_MAX
	SHORT_MIN, SHORT_MIN + 1,
#  if SCHAR_MAX < X_SHORT_MAX
	SCHAR_MIN - 1, SCHAR_MIN, SCHAR_MIN + 1,
#  endif
	-1, 0, 1,
#  if SCHAR_MAX < X_SHORT_MAX
	SCHAR_MAX - 1, SCHAR_MAX, SCHAR_MAX + 1,
#  endif
	SHORT_MAX - 1, SHORT_MAX
#else
	X_SHORT_MIN, X_SHORT_MIN + 1,
#  if SCHAR_MAX < X_SHORT_MAX
	SCHAR_MIN - 1, SCHAR_MIN, SCHAR_MIN + 1,
#  endif
	-1, 0, 1,
#  if SCHAR_MAX < X_SHORT_MAX
	SCHAR_MAX - 1, SCHAR_MAX, SCHAR_MAX + 1,
#  endif
	X_SHORT_MAX - 1, X_SHORT_MAX
#endif
};

static int ints[] = {
#if INT_MAX <= X_INT_MAX
	INT_MIN, INT_MIN +1,
#  if SHORT_MAX < X_INT_MAX
	SHORT_MIN -1, SHORT_MIN, SHORT_MIN + 1,
#  endif
#  if SCHAR_MAX < X_INT_MAX
	SCHAR_MIN - 1, SCHAR_MIN, SCHAR_MIN + 1,
#  endif
	-1, 0, 1,
#  if SCHAR_MAX < X_INT_MAX
	SCHAR_MAX - 1, SCHAR_MAX, SCHAR_MAX + 1,
#  endif
#  if SHORT_MAX < X_INT_MAX
	SHORT_MAX - 1, SHORT_MAX, SHORT_MAX +1,
#  endif
	INT_MAX - 1, INT_MAX
#else
	X_INT_MIN, X_INT_MIN +1,
#  if SHORT_MAX < X_INT_MAX
	SHORT_MIN -1, SHORT_MIN, SHORT_MIN + 1,
#  endif
#  if SCHAR_MAX < X_INT_MAX
	SCHAR_MIN - 1, SCHAR_MIN, SCHAR_MIN + 1,
#  endif
	-1, 0, 1,
#  if SCHAR_MAX < X_INT_MAX
	SCHAR_MAX - 1, SCHAR_MAX, SCHAR_MAX + 1,
#  endif
#  if SHORT_MAX < X_INT_MAX
	SHORT_MAX - 1, SHORT_MAX, SHORT_MAX +1,
#  endif
	X_INT_MAX - 1, X_INT_MAX
#endif /* INT */
};


/* N.B. only testing longs over X_INT range for now */
static long longs[] = {
#if LONG_MAX <= X_INT_MAX
	LONG_MIN, LONG_MIN +1,
#  if INT_MAX < X_INT_MAX
	INT_MIN -1, INT_MIN, INT_MIN + 1,
#  endif
#  if SHORT_MAX < X_INT_MAX
	SHORT_MIN -1, SHORT_MIN, SHORT_MIN + 1,
#  endif
#  if SCHAR_MAX < X_INT_MAX
	SCHAR_MIN - 1, SCHAR_MIN, SCHAR_MIN + 1,
#  endif
	-1, 0, 1,
#  if SCHAR_MAX < X_INT_MAX
	SCHAR_MAX - 1, SCHAR_MAX, SCHAR_MAX + 1,
#  endif
#  if SHORT_MAX < X_INT_MAX
	SHORT_MAX - 1, SHORT_MAX, SHORT_MAX +1,
#  endif
#  if INT_MAX < X_INT_MAX
	INT_MAX -1, INT_MAX, INT_MAX + 1,
#  endif
	LONG_MAX - 1, LONG_MAX
#else
	X_INT_MIN, X_INT_MIN +1,
#  if SHORT_MAX < X_INT_MAX
	SHORT_MIN -1, SHORT_MIN, SHORT_MIN + 1,
#  endif
#  if SCHAR_MAX < X_INT_MAX
	SCHAR_MIN - 1, SCHAR_MIN, SCHAR_MIN + 1,
#  endif
	-1, 0, 1,
#  if SCHAR_MAX < X_INT_MAX
	SCHAR_MAX - 1, SCHAR_MAX, SCHAR_MAX + 1,
#  endif
#  if SHORT_MAX < X_INT_MAX
	SHORT_MAX - 1, SHORT_MAX, SHORT_MAX +1,
#  endif
	X_INT_MAX - 1, X_INT_MAX
#endif
};

static float floats[] = {
	 -100.625, -100.5, -100.375, -100.25, -100.125,
	-1.0, -.125, 0., .125, 1.,
	 100.125, 100.25, 100.375, 100.5, 100.625
};

/* The big numbers require 25 bits: 2^(25-i)+1/2^i, i = 2, 3, ..., 6 */
static double doubles[] = {
	-8388608.25, -4194304.125, -2097152.0625, -1048576.03125, -524288.015625
	-100.625, -100.5, -100.375, -100.25, -100.125,
	-1.0, -.125, 0., .125, 1.,
	100.125, 100.25, 100.375, 100.5, 100.625,
	524288.015625, 1048576.03125, 2097152.0625, 4194304.125, 8388608.25
};

/* End of test data */

/*
 *	Copyright 1993, University Corporation for Atmospheric Research
 *      See netcdf/COPYRIGHT file for copying and redistribution conditions.
 */
/*	$Id: t_ncx.c,v 1.43 1996/11/18 23:22:09 steve Exp $ */

/* putget.c */
/*
 * xdr 1 - 3 bytes, leaving adjoining bytes within the word ok.
 * (minimum unit of io is 4 bytes)
 */
static bool_t
xdr_NCvbyte(XDR *xdrs, unsigned rem, unsigned count, char *value) 
{
	char buf[4] ;
	u_int origin ;
	enum xdr_op  x_op = xdrs->x_op ; /* save state */

	if(x_op == XDR_ENCODE)
	{
	/*
	 * Since we only read/write multiples of four bytes,
	 * We will read in the word to change one byte in it.
	 */
		origin = xdr_getpos( xdrs ) ;
		/* next op is a get */
		xdrs->x_op = XDR_DECODE	;
	}

	if(!xdr_opaque(xdrs, buf, 4))
	{
		/* get failed, assume we are trying to read off the end */
		(void)memset(buf, 0, sizeof(buf)) ;
	}

	if(x_op == XDR_ENCODE) /* back to encode */
		xdrs->x_op = x_op ;

	while(count-- != 0)
	{
		if(x_op == XDR_ENCODE)
			buf[rem] = *value ;
		else
			*value = buf[rem] ;
	
		rem++ ;
		value++ ;
	}

	if(x_op == XDR_ENCODE)
	{
		if( !xdr_setpos(xdrs, origin) )
			return(FALSE) ;
		if( !xdr_opaque(xdrs, buf, 4))
			return(FALSE) ;
	}

	return(TRUE) ;
}


/* xdrshorts.c */
/* you may wish to tune this: big on a cray, small on a PC? */
#define NC_SHRT_BUFSIZ 8192
#define NC_NSHRTS_PER (NC_SHRT_BUFSIZ/2) /* number of netshorts the buffer holds */

/*
 * Foreign dataset buffer for fast conversions on the cray.  This also
 * to guarantees word alignment for the conversion routines IEG2CRAY() and
 * CRAY2IEG().  Allocate as static because 32K*8bytes is small on a Cray but
 * memory allocations are expensive.  Reuse this  buffer where applicable. 
 * ie. for xdr_longs(), xdr_floats(), xdr_doubles().
 */
#ifdef CRAY
#define CrayBuffSize 32768			/* size in 8 byte words   */
static long IEEEBuff[CrayBuffSize];    		/* word aligned buffer    */
#endif


/*
 * xdr a short leaving adjoining short within the word ok.
 * (minimum unit of io is 4 bytes)
 */
static bool_t
xdr_NCvshort(XDR *xdrs, unsigned which, short *value)
{
	unsigned char buf[4] ; /* unsigned is important here */
	u_int origin ;
	enum xdr_op  x_op = xdrs->x_op ; /* save state */

	if(x_op == XDR_ENCODE)
	{
		origin = xdr_getpos( xdrs ) ;
		/* next op is a get */
		xdrs->x_op = XDR_DECODE	;
	}

	if(!xdr_opaque(xdrs, (caddr_t)buf, 4))
	{
		/* get failed, assume we are trying to read off the end */
		(void)memset(buf, 0, sizeof(buf)) ;
	}

	if(x_op == XDR_ENCODE) /* back to encode */
		xdrs->x_op = x_op ;

	if(which != 0) which = 2 ;

	if(xdrs->x_op == XDR_ENCODE)
	{
		buf[which +1] = *value % 256 ;
		buf[which] = (*value >> 8) ;

		if( !xdr_setpos(xdrs, origin) )
			return(FALSE) ;
		if( !xdr_opaque(xdrs, (caddr_t)buf, 4))
			return(FALSE) ;
	}
	else
	{
		*value = (((unsigned)buf[which] & 0x7f) << 8) +
			 (unsigned)buf[which + 1] ;
		if((unsigned)buf[which] & 0x80)
		{
			/* extern is neg */
			*value -= 0x8000 ;
		}
	}
	return(TRUE) ;
}

/*
 * internal function, bulk xdr of an even number of shorts, less than NC_NSHRTS_PER
 */
static
bool_t
NCxdr_shortsb(XDR *xdrs, short *sp, u_int nshorts)
{
	unsigned char buf[NC_SHRT_BUFSIZ] ;
	unsigned char *cp ;
	unsigned int nbytes = nshorts * 2;

	/* assert(nshorts <= NC_NSHRTS_PER) ; */
	/* assert(nshorts > 0) ; */

	if(xdrs->x_op == XDR_ENCODE)
	{
		for(cp = buf ; cp < &buf[nbytes] ; sp++, cp += 2 )
		{
			*(cp +1) = *sp % 256 ;
			*cp = (*sp >> 8) ;
		}
	}

	if(!xdr_opaque(xdrs, (caddr_t)buf, nbytes))
		return FALSE ;
	
	if(xdrs->x_op == XDR_DECODE)
	{
		for(cp = buf ; cp < &buf[nbytes] ; sp++, cp += 2 )
		{
			*sp = (((unsigned)*cp & 0x7f) << 8) +
				 (unsigned)*(cp +1) ;
			if((unsigned)*cp & 0x80)
			{
				/* extern is neg */
				*sp -= 0x8000 ;
			}
		}
	}

	return TRUE ;
}


/*
 * Translate an array of cnt short integers at sp.
 */
bool_t
xdr_shorts(XDR *xdrs, short *sp, u_int cnt)
{
	int odd ; /* 1 if cnt is odd, 0 otherwise */

	if(cnt == 0)
		return TRUE ;	/* ? */

	odd = cnt % 2 ;
	if(odd) 
		cnt-- ;
	/* cnt is even, odd is set if apropos */

	while(cnt > NC_NSHRTS_PER)
	{
		if(!NCxdr_shortsb(xdrs, sp, NC_NSHRTS_PER))
			return FALSE ;
		/* else */
		sp += NC_NSHRTS_PER ;
		cnt -= NC_NSHRTS_PER ;
	}

	/* we know cnt <= NC_NSHRTS_PER at this point */

	if(cnt != 0)
	{
		if(!NCxdr_shortsb(xdrs, sp, cnt))
			return FALSE ;
		/* else */
		sp += cnt ;
		cnt = 0 ;
	}

	if(odd)
		if(!xdr_NCvshort(xdrs, 0, sp))
			return FALSE ;

	return TRUE ;
}

/*
 * Use standard xdr interface (plus the netcdf xdr_shorts())
 * to encode data to 'buf'
 * Returns 0 on success.
 */
static int
xdr_encode(char *buf, u_int sz)
{
	XDR xdrs[1];
	u_int pos;
	int ii;

	xdrmem_create(xdrs, buf, sz, XDR_ENCODE);

	if(!xdr_opaque(xdrs, (caddr_t)text, (u_int)sizeof(text)))
		return 1;

	if(!xdr_opaque(xdrs, (caddr_t)schars, (u_int)sizeof(schars)))
		return 2;

	if(!xdr_shorts(xdrs, shorts, uiArraySize(shorts)))
		return 3;

	if(!xdr_vector(xdrs, (char *)ints,
			uiArraySize(ints), eSizeOf(ints),
			(xdrproc_t)xdr_int))
		return 4;

	/* double the ints to check both ncx_ interfaces */
	if(!xdr_vector(xdrs, (char *)ints,
			uiArraySize(ints), eSizeOf(ints),
			(xdrproc_t)xdr_int))
		return 5;

#ifndef NO_UNSIGNED
	if(!xdr_vector(xdrs, (char *)u_ints,
			uiArraySize(u_ints), eSizeOf(u_ints),
			(xdrproc_t)xdr_u_int))
		return 6;
#endif

	if(!xdr_vector(xdrs, (char *)longs,
			uiArraySize(longs), eSizeOf(longs),
			(xdrproc_t)xdr_long))
		return 7;

#ifndef NO_UNSIGNED_LONG
	if(!xdr_vector(xdrs, (char *)u_longs,
			uiArraySize(u_longs), eSizeOf(u_longs),
			(xdrproc_t)xdr_u_long))
		return 9;
#endif

	if(!xdr_vector(xdrs, (char *)floats,
			uiArraySize(floats), eSizeOf(floats),
			(xdrproc_t)xdr_float))
		return 10;

	if(!xdr_vector(xdrs, (char *)doubles,
			uiArraySize(doubles), eSizeOf(doubles),
			(xdrproc_t)xdr_double))
		return 11;

	/* mix it up */
	for(ii = 1; ii < 5; ii++)
	{
		if(
				!xdr_opaque(xdrs, (caddr_t)text, ii)
				|| !xdr_shorts(xdrs, shorts, ii)
				|| !xdr_opaque(xdrs, (caddr_t)schars, ii)
		)
			return (11 + ii);
	}

	/*
	 * Test non-aligned unit ops used by netcdf.
	 */

	for(ii = 1; ii < 5; ii++)
	{
		pos = xdr_getpos(xdrs);
		if(!xdr_NCvbyte(xdrs, ii, BYTES_PER_XDR_UNIT -ii, &text[ii]))
			return (15 + ii);
		if(!xdr_setpos(xdrs, pos + BYTES_PER_XDR_UNIT))
			return (15 + ii);
	}

	for(ii = 1; ii < 5; ii++)
	{
		pos = xdr_getpos(xdrs);
		if(!xdr_NCvbyte(xdrs, ii, BYTES_PER_XDR_UNIT -ii,
				(char *)&schars[ii]))
			return (19 + ii);
		if(!xdr_setpos(xdrs, pos + BYTES_PER_XDR_UNIT))
			return (18 + ii);
	}

	for(ii = 1; ii < 3; ii++)
	{
		pos = xdr_getpos(xdrs);
		if(!xdr_NCvshort(xdrs, ii%2, &shorts[ii]))
			return (23 + ii);
		if(!xdr_setpos(xdrs, pos + BYTES_PER_XDR_UNIT))
			return (23 + ii);
	}

	pos = xdr_getpos(xdrs);
	(void) printf("xdr_encode ends at byte %u\n", pos);

	return 0;
}


static int
cmp_chars(const char *c1, const char *c2, size_t nchars)
{
	int status = 0;
	const char *const end = c1 + nchars;

	while(c1 < end)
	{
		if(*c1 != *c2)
		{
			(void) fprintf(stderr,
					"%c != %c char\n",
					*c1,
					*c2);
			if(status == 0)
				status = *c2 < *c1 ? -1 : 1;
		}
		c1++, c2++;
	}

	return status;
}

static int
cmp_schars(const schar *b1, const schar *b2, size_t nbytes)
{
	int status = 0;
	const schar *const end = b1 + nbytes;

	while(b1 < end)
	{
		if(*b1 != *b2)
		{
			(void) fprintf(stderr,
					"0x%02x != 0x%02x byte\n",
					(unsigned)(*b1),
					(unsigned)(*b2));
				
			if(status == 0)
				status = *b2 < *b1 ? -1 : 1;
		}
		b1++, b2++;
	}

	return status;
}

static int
cmp_shorts(const short *s1, const short *s2, size_t nshorts)
{
	int status = 0;
	const short *const end = s1 + nshorts;

	while(s1 < end)
	{
		if(*s1 != *s2)
		{
			(void) fprintf(stderr,
					"0x%04x != 0x%04x (%hd) short\n",
					(unsigned)(*s1),
					(unsigned)(*s2), *s2);
			if(status == 0)
				status = *s2 < *s1 ? -1 : 1;
		}
		s1++, s2++;
	}

	return status;
}

static int
cmp_ints(const int *i1, const int *i2, size_t nints)
{
	int status = 0;
	const int *const end = i1 + nints;

	while(i1 < end)
	{
		if(*i1 != *i2)
		{
			(void) fprintf(stderr,
					"0x%08x != 0x%08x int\n",
					(unsigned)(*i1),
					(unsigned)(*i2));
			if(status == 0)
				status = *i2 < *i1 ? -1 : 1;
		}
		i1++, i2++;
	}

	return status;
}

#ifndef NO_UNSIGNED
static int
cmp_u_ints(const unsigned int *i1, const unsigned int *i2, size_t nints)
{
	int status = 0;
	const unsigned int *const end = i1 + nints;

	while(i1 < end)
	{
		if(*i1 != *i2)
		{
			(void) fprintf(stderr,
					"(%u) 0x%08x != 0x%08x (%u) uint\n",
					*i1, *i1,
					*i2, *i2);
			if(status == 0)
				status = *i2 < *i1 ? -1 : 1;
		}
		i1++, i2++;
	}

	return status;
}
#endif

static int
cmp_longs(const long *l1, const long *l2, size_t nlongs)
{
	int status = 0;
	const long *const end = l1 + nlongs;

	while(l1 < end)
	{
		if(*l1 != *l2)
		{
			(void) fprintf(stderr,
					"0x%016lx != 0x%016lx long\n",
					(unsigned long)(*l1),
					(unsigned long)(*l2));
			if(status == 0)
				status = *l2 < *l1 ? -1 : 1;
		}
		l1++, l2++;
	}

	return status;
}

#ifndef NO_UNSIGNED_LONG
static int
cmp_u_longs(const unsigned long *l1, const unsigned long *l2, size_t nlongs)
{
	int status = 0;
	const unsigned long *const end = l1 + nlongs;

	while(l1 < end)
	{
		if(*l1 != *l2)
		{
			(void) fprintf(stderr,
					"0x%016lx != 0x%016lx ulong\n",
					*l1,
					*l2);
			if(status == 0)
				status = *l2 < *l1 ? -1 : 1;
		}
		l1++, l2++;
	}

	return status;
}
#endif

static int
cmp_floats(const float *f1, const float *f2, size_t nfloats)
{
#define F_EPS 1.0e-6

	int status = 0;
	const float *const end = f1 + nfloats;

	while(f1 < end)
	{
		if(*f1 < *f2 && *f2 - *f1 > F_EPS)
		{
			(void) fprintf(stderr,
					"%.9e != %.9e float (diff %.9e)\n",
					*f1, *f2, *f1 - *f2);
			if(status == 0)
				status = 1;
		}
		else if( *f2 < *f1 && *f1 - *f2 > F_EPS)
		{
			(void) fprintf(stderr,
					"%.9e != %.9e float (diff %.9e)\n",
					*f1, *f2, *f1 - *f2);
			if(status == 0)
				status = -1;
		}
		f1++, f2++;
	}

	return status;
}

static int
cmp_doubles(const double *d1, const double *d2, size_t ndoubles)
{
#define D_EPS 1.0e-15

	int status = 0;
	const double *const end = d1 + ndoubles;

	while(d1 < end)
	{
		if(*d1 < *d2 && *d2 - *d1 > D_EPS)
		{
			(void) fprintf(stderr,
					"%.17e != %.17e double (diff %.17e)\n",
					*d1, *d2, *d1 - *d2);
			if(status == 0)
				status = 1;
		}
		else if( *d2 < *d1 && *d1 - *d2 > D_EPS)
		{
			(void) fprintf(stderr,
					"%.17e != %.17e double (diff %.17e)\n",
					*d1, *d2, *d1 - *d2);
			if(status == 0)
				status = -1;
		}
		d1++, d2++;
	}

	return status;
}

/*
 * Verify that data in buf is as encoded
 * by xdr_encode() above.
 * Returns zero on sucess.
 */
static int
xdr_check(char *buf, u_int sz)
{
	XDR xdrs[1];
	char tbuf[XBSZ];
	u_int pos;
	int ii;
	int jj;

	xdrmem_create(xdrs, buf, sz, XDR_DECODE);

	(void) memset(tbuf, 0, sizeof(text)+4);
	if(!xdr_opaque(xdrs, (caddr_t)tbuf, (u_int)sizeof(text))
			|| cmp_chars(tbuf, text,
				 sizeof(text)) != 0)
		return 1;

	(void) memset(tbuf, 0, sizeof(schars)+4);
	if(!xdr_opaque(xdrs, (caddr_t)tbuf, (u_int)sizeof(schars))
			|| cmp_schars((schar *)tbuf, schars,
				sizeof(schars)) != 0)
		return 2;

	(void) memset(tbuf, 0, sizeof(shorts)+4);
	if(!xdr_shorts(xdrs, (short *)tbuf, uiArraySize(shorts))
			|| cmp_shorts((short *)tbuf, shorts,
				 ArraySize(shorts)) != 0)
		return 3;

	(void) memset(tbuf, 0, sizeof(ints)+4);
	if(!xdr_vector(xdrs, tbuf,
		uiArraySize(ints), eSizeOf(ints),
		(xdrproc_t)xdr_int)
			|| cmp_ints((int *)tbuf, ints,
				 ArraySize(ints)) != 0)
		return 4;

	/* double the ints to check both ncx_ interfaces */
	(void) memset(tbuf, 0, sizeof(ints)+4);
	if(!xdr_vector(xdrs, tbuf,
		uiArraySize(ints), eSizeOf(ints),
		(xdrproc_t)xdr_int)
			|| cmp_ints((int *)tbuf, ints,
				 ArraySize(ints)) != 0)
		return 5;

#ifndef NO_UNSIGNED
	(void) memset(tbuf, 0, sizeof(u_ints)+4);
	if(!xdr_vector(xdrs, tbuf,
		uiArraySize(u_ints), eSizeOf(u_ints),
		(xdrproc_t)xdr_u_int)
			|| cmp_u_ints((unsigned int *)tbuf, u_ints,
				ArraySize(u_ints)) != 0)
		return 6;
#endif

	(void) memset(tbuf, 0, sizeof(longs)+4);
	if(!xdr_vector(xdrs, tbuf,
		uiArraySize(longs), eSizeOf(longs), (xdrproc_t)xdr_long)
			|| cmp_longs((long *)tbuf, longs,
				 ArraySize(longs)) != 0)
		return 7;

#ifndef NO_UNSIGNED_LONG
	(void) memset(tbuf, 0, sizeof(u_longs)+4);
	if(!xdr_vector(xdrs, tbuf,
		uiArraySize(u_longs), eSizeOf(u_longs), (xdrproc_t)xdr_u_long)
			|| cmp_u_longs((unsigned long *)tbuf, u_longs,
				ArraySize(u_longs)) != 0)
		return 9;
#endif

	(void) memset(tbuf, 0, sizeof(floats)+4);
	if(!xdr_vector(xdrs, tbuf,
		uiArraySize(floats), eSizeOf(floats), (xdrproc_t)xdr_float)
			|| cmp_floats((float *)tbuf, floats,
				 ArraySize(floats)) != 0)
		return 10;

	(void) memset(tbuf, 0, sizeof(doubles)+4);
	if(!xdr_vector(xdrs, tbuf,
		uiArraySize(doubles), eSizeOf(doubles), (xdrproc_t)xdr_double)
			|| cmp_doubles((double *)tbuf, doubles,
				 ArraySize(doubles)) != 0)
		return 11;

	for(ii = 1; ii < 5; ii++)
	{
		char tx[4];
		short sh[4];
		schar by[4];
		if(
				!xdr_opaque(xdrs, (caddr_t)tx, ii)
				|| !xdr_shorts(xdrs, sh, ii)
				|| !xdr_opaque(xdrs, (caddr_t)by, ii)
		)
			return (11 + ii);
		for(jj = 0; jj < ii; jj++)
		{
			if(tx[jj] != text[jj])
			{
				(void) fprintf(stderr, "\txdr %c != %c text[%d]\n",
						tx[jj], text[jj], jj);
				return (11 + ii);
			}
			/* else */
			if(sh[jj] != shorts[jj])
			{
				(void) fprintf(stderr, "\txdr %hd != %hd shorts[%d]\n",
						sh[jj], shorts[jj], jj);
				return (11 + ii);
			}
			/* else */
			if(by[jj] != schars[jj])
			{
				(void) fprintf(stderr,
					"\txdr 0x%02x != 0x%02x schars[%d]\n",
						(unsigned) by[jj],
						(unsigned) schars[jj], jj);
				return (11 + ii);
			}
			/* else */
		}
	}

	/*
	 * Test non-aligned unit ops used by netcdf.
	 */

	for(ii = 1; ii < 5; ii++)
	{
		pos = xdr_getpos(xdrs);
		(void) memset(tbuf, 0, BYTES_PER_XDR_UNIT);
		if(!xdr_NCvbyte(xdrs, ii, BYTES_PER_XDR_UNIT -ii, tbuf)
				|| cmp_chars(&text[ii], tbuf,
					BYTES_PER_XDR_UNIT -ii) != 0)
			return (15 + ii);
		if(!xdr_setpos(xdrs, pos + BYTES_PER_XDR_UNIT))
			return (15 + ii);
	}

	for(ii = 1; ii < 5; ii++)
	{
		pos = xdr_getpos(xdrs);
		(void) memset(tbuf, 0, BYTES_PER_XDR_UNIT);
		if(!xdr_NCvbyte(xdrs, ii, BYTES_PER_XDR_UNIT -ii, tbuf)
				|| cmp_schars((schar *)tbuf, &schars[ii],
					BYTES_PER_XDR_UNIT -ii) != 0)
			return (19 + ii);
		if(!xdr_setpos(xdrs, pos + BYTES_PER_XDR_UNIT))
			return (19 + ii);
	}

	for(ii = 1; ii < 3; ii++)
	{
		pos = xdr_getpos(xdrs);
		(void) memset(tbuf, 0, BYTES_PER_XDR_UNIT);
		if(!xdr_NCvshort(xdrs, ii%2, (short *)tbuf)
				|| cmp_shorts((short *)tbuf, &shorts[ii], 1))
			return (23 + ii);
		if(!xdr_setpos(xdrs, pos + BYTES_PER_XDR_UNIT))
			return (23 + ii);
	}

	pos = xdr_getpos(xdrs);
	(void) printf("xdr_check  ends at byte %u\n", pos);

	return 0;
}


/* Poor man's template */
#define NCX_VEC(xpp, nn, vecp, TYPE, proc, step) \
{ \
\
	size_t nelems = (nn); \
	TYPE *elemp = (vecp); \
\
	while(nelems != 0) \
	{ \
		status = (proc)((*(xpp)), elemp); \
		if(status != ENOERR) \
			break; \
		(*(xpp)) = (void *)((char *)(*(xpp)) + (step)); \
		elemp ++; \
		nelems--; \
	} \
}


/*
 * Use ncx interface
 * to encode data to 'buf'
 * Returns zero on success.
 */
static int
ncx_encode(char *buf)
{
	int status = ENOERR;

	void *vp = buf;
	int ii;

	if(ncx_pad_putn_text(&vp, sizeof(text), text))
		return 1;

	if(ncx_pad_putn_schar_schar(&vp, sizeof(schars), schars))
		return 2;

	if(ncx_pad_putn_short_short(&vp, ArraySize(shorts), shorts))
		return 3;

	if(ncx_putn_int_int(&vp, ArraySize(ints), ints))
		return 4;

	NCX_VEC(&vp, ArraySize(ints), ints,
		 	int, ncx_put_int_int, X_SIZEOF_INT);
	if(status != ENOERR)
		return 5;

#ifndef NO_UNSIGNED
	NCX_VEC(&vp, ArraySize(u_ints), u_ints,
			unsigned int, ncx_put_uint_uint, X_SIZEOF_INT);
	if(status != ENOERR)
		return 6;
#endif

	if(ncx_putn_int_long(&vp, ArraySize(longs), longs))
		return 7;

#ifndef NO_UNSIGNED_LONG
	NCX_VEC(&vp, ArraySize(u_longs), u_longs,
			unsigned long, ncx_put_ulong_ulong, X_SIZEOF_LONG);
	if(status != ENOERR)
		return 9;
#endif

	if(ncx_putn_float_float(&vp, ArraySize(floats), floats))
		return 10;

	if(ncx_putn_double_double(&vp, ArraySize(doubles), doubles))
		return 11;

	/* mix it up */
	for(ii = 1; ii < 5; ii++)
	{
		if(
				ncx_pad_putn_text(&vp, ii, text)
				|| ncx_pad_putn_short_short(&vp, ii, shorts)
				|| ncx_pad_putn_schar_schar(&vp, ii, schars)
		)
			return (11 + ii);
	}

	/*
	 * Test non-aligned unit ops used by netcdf.
	 */

	for(ii = 1; ii < 5; ii++)
	{
		vp = (char *)vp + ii;
		if(ncx_putn_text(&vp, X_ALIGN - ii, &text[ii]))
			return (15 + ii);
	}

	for(ii = 1; ii < 5; ii++)
	{
		vp = (char *)vp + ii;
		if(ncx_putn_schar_schar(&vp, X_ALIGN - ii, &schars[ii]))
			return (19 + ii);
	}

	for(ii = 1; ii < 3; ii++)
	{
		char *pos = vp;
		vp = (char *)vp + (ii%2) * 2;
		if(ncx_putn_short_short(&vp, 1, &shorts[ii]))
			return (23 + ii);
		vp = pos + X_ALIGN;
	}

	(void) printf("ncx_encode ends at byte %u\n",
		 (unsigned)(((char *)vp) - buf));

	return 0;
}

/* 
 * Verify the ncx_getn_xxx() routines.
 * Returns zero on success.
 */
static int
ncx_check(char *buf)
{
	int status = ENOERR;
	const void *vp = buf;
	char tbuf[XBSZ];
	int ii;
	int jj;

	(void) memset(tbuf, 0, sizeof(text)+4);
	if(ncx_pad_getn_text(&vp, sizeof(text), tbuf)
			|| cmp_chars(tbuf, text,
				 sizeof(text)) != 0)
		return 1;

	(void) memset(tbuf, 0, sizeof(schars)+4);
	if(ncx_pad_getn_schar_schar(&vp, sizeof(schars), (schar *)tbuf)
			|| cmp_schars((schar *)tbuf, schars,
				 sizeof(schars)) != 0)
		return 2;

	(void) memset(tbuf, 0, sizeof(shorts)+4);
	if(ncx_pad_getn_short_short(&vp, ArraySize(shorts), (short *)tbuf)
			|| cmp_shorts((short *)tbuf, shorts,
				 ArraySize(shorts)) != 0)
		return 3;

	(void) memset(tbuf, 0, sizeof(ints)+4);
	if(ncx_getn_int_int(&vp, ArraySize(ints), (int *)tbuf)
			|| cmp_ints((int *)tbuf, ints,
				 ArraySize(ints)) != 0)
		return 4;

	(void) memset(tbuf, 0, sizeof(ints)+4);
	NCX_VEC(&vp, ArraySize(ints), (int *)tbuf,
				int, ncx_get_int_int, X_SIZEOF_INT);
	if(status != ENOERR
			|| cmp_ints((int *)tbuf, ints,
				 ArraySize(ints)) != 0)
		return 5;

#ifndef NO_UNSIGNED
	(void) memset(tbuf, 0, sizeof(u_ints)+4);
	NCX_VEC(&vp, ArraySize(u_ints), (unsigned int *)tbuf,
				unsigned, ncx_get_uint_uint, X_SIZEOF_INT);
	if(status != ENOERR
			|| cmp_u_ints((unsigned int *)tbuf, u_ints,
				 ArraySize(u_ints)) != 0)
		return 6;
#endif

	(void) memset(tbuf, 0, sizeof(longs)+4);
	if(ncx_getn_int_long(&vp, ArraySize(longs), (long *)tbuf)
			|| cmp_longs((long *)tbuf, longs,
				 ArraySize(longs)) != 0)
		return 7;

#ifndef NO_UNSIGNED_LONG
	(void) memset(tbuf, 0, sizeof(u_longs)+4);
	NCX_VEC(&vp, ArraySize(u_longs), (unsigned long *)tbuf,
			unsigned long, ncx_get_ulong_ulong, X_SIZEOF_LONG);
	if(status != ENOERR
			|| cmp_u_longs((unsigned long *)tbuf, u_longs,
				ArraySize(u_longs)) != 0)
		return 9;
#endif

	(void) memset(tbuf, 0, sizeof(floats)+4);
	if(ncx_getn_float_float(&vp, ArraySize(floats), (float *)tbuf)
			|| cmp_floats((float *)tbuf, floats,
				 ArraySize(floats)) != 0)
		return 10;

	(void) memset(tbuf, 0, sizeof(doubles)+4);
	if(ncx_getn_double_double(&vp, ArraySize(doubles), (double *)tbuf)
			|| cmp_doubles((double *)tbuf, doubles,
				 ArraySize(doubles)) != 0)
		return 11;

	for(ii = 1; ii < 5; ii++)
	{
		char tx[4];
		short sh[4];
		schar by[4];
		if(
				ncx_pad_getn_text(&vp, ii, tx)
				|| ncx_pad_getn_short_short(&vp, ii, sh)
				|| ncx_pad_getn_schar_schar(&vp, ii, by)
		)
			return (11 + ii);
		for(jj = 0; jj < ii; jj++)
		{
			if(tx[jj] != text[jj])
			{
				(void) fprintf(stderr,
					"\tncx %c != %c text[%d]\n",
						tx[jj], text[jj], jj);
				return (11 + ii);
			}
			/* else */
			if(sh[jj] != shorts[jj])
			{
				(void) fprintf(stderr,
					 "\tncx %hd != %hd shorts[%d]\n",
						sh[jj], shorts[jj], jj);
				return (11 + ii);
			}
			/* else */
			if((unsigned)by[jj] != (unsigned)schars[jj])
			{
				(void) fprintf(stderr,
					"\tncx 0x%02x != 0x%02x schars[%d] %d\n",
						by[jj], schars[jj], jj, ii);
				return (11 + ii);
			}
		}
	}

	/*
	 * Test non-aligned unit ops used by netcdf.
	 */

	for(ii = 1; ii < 5; ii++)
	{
		(void) memset(tbuf, 0, X_ALIGN);
		vp = (char *)vp + ii;
		if(ncx_getn_text(&vp, X_ALIGN -ii, tbuf)
				|| cmp_chars(tbuf, &text[ii],
					 X_ALIGN -ii) != 0)
			return (15 + ii);
	}

	for(ii = 1; ii < 5; ii++)
	{
		(void) memset(tbuf, 0, X_ALIGN);
		vp = (char *)vp + ii;
		if(ncx_getn_schar_schar(&vp, X_ALIGN -ii, (schar *)tbuf)
				|| cmp_schars((schar *)tbuf, &schars[ii],
					 X_ALIGN -ii) != 0)
			return (19 + ii);
	}

	for(ii = 1; ii < 3; ii++)
	{
		const char *pos = vp;
		(void) memset(tbuf, 0, X_ALIGN);
		vp = (char *)vp + (ii%2) *2;
		if(ncx_getn_short_short(&vp, 1, (short *)tbuf)
				|| cmp_shorts((short *)tbuf, &shorts[ii],
					 1) != 0)
			return (23 + ii);
		vp = pos + X_ALIGN;
	}

	(void) printf("ncx_check  ends at byte %u\n",
		 (unsigned)(((char *)vp) - buf));


	return 0;
}


int
main(int ac, char *av[])
{
	int status;

	status = xdr_encode(xdrb, sizeof(xdrb));
	if(status)
	{
		(void) fprintf(stderr,
			 "xdr_encode failed %d\n", status);
		return 1;
	}

	status = xdr_check(xdrb, sizeof(xdrb));
	if(status)
	{
		(void) fprintf(stderr,
			 "xdr_check of xdrb failed %d\n", status);
		return 1;
	}

	status = ncx_encode(ncxb);
	if(status)
	{
		(void) fprintf(stderr,
			 "ncx_encode failed %d\n", status);
		return 1;
	}

	/* cross check */
	status = xdr_check(ncxb, sizeof(ncxb));
	if(status)
	{
		(void) fprintf(stderr,
			 "xdr_check of ncxb failed %d\n", status);
		return 1;
	}

	status = ncx_check(xdrb);
	if(status)
	{
		(void) fprintf(stderr,
			 "ncx_check of xdrb failed %d\n", status);
		return 1;
	}

	status = ncx_check(ncxb);
	if(status)
	{
		(void) fprintf(stderr,
			 "ncx_check of ncxb failed %d\n", status);
		return 1;
	}

	return 0;
}
