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Replace <sys/param.h> with <limits.h> and other less dirty headers where
possible.  Annotate <sys/param.h> lines with their current reasons.  Switch
to PATH_MAX, NGROUPS_MAX, HOST_NAME_MAX+1, LOGIN_NAME_MAX, etc.  Change
MIN() and MAX() to local definitions of MINIMUM() and MAXIMUM() where
sensible to avoid pulling in the pollution.  These are the files confirmed
through binary verification.
ok guenther, millert, doug (helped with the verification protocol)

/*	$OpenBSD: aparams.c,v 1.15 2015/01/16 06:40:05 deraadt Exp $	*/
/*
 * Copyright (c) 2008 Alexandre Ratchov <alex@caoua.org>
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

#include <endian.h>

#include "aparams.h"
#ifdef DEBUG
#include "dbg.h"
#endif

int aparams_ctltovol[128] = {
	    0,
	  256,	  266,	  276,	  287,	  299,	  310,	  323,	  335,
	  348,	  362,	  376,	  391,	  406,	  422,	  439,	  456,
	  474,	  493,	  512,	  532,	  553,	  575,	  597,	  621,
	  645,	  670,	  697,	  724,	  753,	  782,	  813,	  845,
	  878,	  912,	  948,	  985,	 1024,	 1064,	 1106,	 1149,
	 1195,	 1241,	 1290,	 1341,	 1393,	 1448,	 1505,	 1564,
	 1625,	 1689,	 1756,	 1825,	 1896,	 1971,	 2048,	 2128,
	 2212,	 2299,	 2389,	 2483,	 2580,	 2682,	 2787,	 2896,
	 3010,	 3128,	 3251,	 3379,	 3511,	 3649,	 3792,	 3941,
	 4096,	 4257,	 4424,	 4598,	 4778,	 4966,	 5161,	 5363,
	 5574,	 5793,	 6020,	 6256,	 6502,	 6757,	 7023,	 7298,
	 7585,	 7883,	 8192,	 8514,	 8848,	 9195,	 9556,	 9931,
	10321,	10726,	11148,	11585,	12040,	12513,	13004,	13515,
	14045,	14596,	15170,	15765,	16384,	17027,	17696,	18390,
	19112,	19863,	20643,	21453,	22295,	23170,	24080,	25025,
	26008,	27029,	28090,	29193,	30339,	31530,	32768
};

/*
 * Fake parameters for byte-streams
 */
struct aparams aparams_none = { 1, 0, 0, 0, 0, 0, 0, 0 };

#ifdef DEBUG
/*
 * Generate a string corresponding to the encoding in par,
 * return the length of the resulting string.
 */
int
aparams_enctostr(struct aparams *par, char *ostr)
{
	char *p = ostr;

	*p++ = par->sig ? 's' : 'u';
	if (par->bits > 9)
		*p++ = '0' + par->bits / 10;
	*p++ = '0' + par->bits % 10;
	if (par->bps > 1) {
		*p++ = par->le ? 'l' : 'b';
		*p++ = 'e';
		if (par->bps != APARAMS_BPS(par->bits) ||
		    par->bits < par->bps * 8) {
			*p++ = par->bps + '0';
			if (par->bits < par->bps * 8) {
				*p++ = par->msb ? 'm' : 'l';
				*p++ = 's';
				*p++ = 'b';
			}
		}
	}
	*p++ = '\0';
	return p - ostr - 1;
}
#endif /* DEBUG */

/*
 * Parse an encoding string, examples: s8, u8, s16, s16le, s24be ...
 * set *istr to the char following the encoding. Return the number
 * of bytes consumed.
 */
int
aparams_strtoenc(struct aparams *par, char *istr)
{
	char *p = istr;
	int i, sig, bits, le, bps, msb;

#define IS_SEP(c)			\
	(((c) < 'a' || (c) > 'z') &&	\
	 ((c) < 'A' || (c) > 'Z') &&	\
	 ((c) < '0' || (c) > '9'))

	/*
	 * get signedness
	 */
	if (*p == 's') {
		sig = 1;
	} else if (*p == 'u') {
		sig = 0;
	} else
		return 0;
	p++;

	/*
	 * get number of bits per sample
	 */
	bits = 0;
	for (i = 0; i < 2; i++) {
		if (*p < '0' || *p > '9')
			break;
		bits = (bits * 10) + *p - '0';
		p++;
	}
	if (bits < BITS_MIN || bits > BITS_MAX)
		return 0;
	bps = APARAMS_BPS(bits);
	msb = 1;
	le = ADATA_LE;

	/*
	 * get (optional) endianness
	 */
	if (p[0] == 'l' && p[1] == 'e') {
		le = 1;
		p += 2;
	} else if (p[0] == 'b' && p[1] == 'e') {
		le = 0;
		p += 2;
	} else if (IS_SEP(*p)) {
		goto done;
	} else
		return 0;

	/*
	 * get (optional) number of bytes
	 */
	if (*p >= '0' && *p <= '9') {
		bps = *p - '0';
		if (bps < (bits + 7) / 8 ||
		    bps > (BITS_MAX + 7) / 8)
			return 0;
		p++;

		/*
		 * get (optional) alignement
		 */
		if (p[0] == 'm' && p[1] == 's' && p[2] == 'b') {
			msb = 1;
			p += 3;
		} else if (p[0] == 'l' && p[1] == 's' && p[2] == 'b') {
			msb = 0;
			p += 3;
		} else if (IS_SEP(*p)) {
			goto done;
		} else
			return 0;
	} else if (!IS_SEP(*p))
		return 0;

done:
       	par->msb = msb;
	par->sig = sig;
	par->bits = bits;
	par->bps = bps;
	par->le = le;
	return p - istr;
}

/*
 * Initialise parameters structure with the defaults natively supported
 * by the machine.
 */
void
aparams_init(struct aparams *par, unsigned int cmin, unsigned int cmax,
    unsigned int rate)
{
	par->bps = sizeof(adata_t);
	par->bits = ADATA_BITS;
	par->le = ADATA_LE;
	par->sig = 1;
	par->msb = 0;
	par->cmin = cmin;
	par->cmax = cmax;
	par->rate = rate;
}

#ifdef DEBUG
/*
 * Print the format/channels/encoding on stderr.
 */
void
aparams_dbg(struct aparams *par)
{
	char enc[ENCMAX];

	aparams_enctostr(par, enc);
	dbg_puts(enc);
	dbg_puts(",");
	dbg_putu(par->cmin);
	dbg_puts(":");
	dbg_putu(par->cmax);
	dbg_puts(",");
	dbg_putu(par->rate);
}
#endif

/*
 * Return true if both encodings are the same.
 */
int
aparams_eqenc(struct aparams *par1, struct aparams *par2)
{
	if (par1->bps != par2->bps ||
	    par1->bits != par2->bits ||
	    par1->sig != par2->sig)
		return 0;
	if ((par1->bits != 8 * par1->bps) && par1->msb != par2->msb)
		return 0;
	if (par1->bps > 1 && par1->le != par2->le)
		return 0;
	return 1;
}

/*
 * Grow channels range and sample rate of ``set'' in order ``subset'' to
 * become an actual subset of it.
 */
void
aparams_grow(struct aparams *set, struct aparams *subset)
{
	if (set->cmin > subset->cmin)
		set->cmin = subset->cmin;
	if (set->cmax < subset->cmax)
		set->cmax = subset->cmax;
	if (set->rate < subset->rate)
		set->rate = subset->rate;
}

/*
 * Return true if rates are the same.
 */
int
aparams_eqrate(struct aparams *p1, struct aparams *p2)
{
	/* XXX: allow 1/9 halftone of difference */
	return p1->rate == p2->rate;
}


/*
 * Return the number of bytes per frame with the given parameters.
 */
unsigned int
aparams_bpf(struct aparams *par)
{
	return (par->cmax - par->cmin + 1) * par->bps;
}

void
aparams_copyenc(struct aparams *dst, struct aparams *src)
{
	dst->sig = src->sig;
	dst->le = src->le;
	dst->msb = src->msb;
	dst->bits = src->bits;
	dst->bps = src->bps;
}