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rcsid[] and sccsid[] and copyright[] are essentially unmaintained (and
unmaintainable).  these days, people use source.  these id's do not provide
any benefit, and do hurt the small install media
(the 33,000 line diff is essentially mechanical)
ok with the idea millert, ok dms

/*	$OpenBSD: init.c,v 1.12 2009/10/27 23:59:43 deraadt Exp $	*/

/*-
 * Copyright (c) 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * Peter McIlroy.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#include "sort.h"

#include <ctype.h>
#include <string.h>

extern struct coldesc *clist;
extern int ncols;
u_char gweights[NBINS];

static void insertcol(struct field *);
char *setcolumn(char *, struct field *, int);

/*
 * clist (list of columns which correspond to one or more icol or tcol)
 * is in increasing order of columns.
 * Fields are kept in increasing order of fields.
 */

/* 
 * keep clist in order--inserts a column in a sorted array
 */
static void
insertcol(struct field *field)
{
	int i;
	for (i = 0; i < ncols; i++)
		if (field->icol.num <= clist[i].num)
			break;
	if (field->icol.num != clist[i].num) {
		memmove(clist+i+1, clist+i, sizeof(COLDESC)*(ncols-i));
		clist[i].num = field->icol.num;
		ncols++;
	}
	if (field->tcol.num && field->tcol.num != field->icol.num) {
		for (i = 0; i < ncols; i++)
			if (field->tcol.num <= clist[i].num)
				break;
		if (field->tcol.num != clist[i].num) {
			memmove(clist+i+1, clist+i,sizeof(COLDESC)*(ncols-i));
			clist[i].num = field->tcol.num;
			ncols++;
		}
	}
}

/*
 * matches fields with the appropriate columns--n^2 but who cares?
 */
void
fldreset(struct field *fldtab)
{
	int i;
	fldtab[0].tcol.p = clist+ncols-1;
	for (++fldtab; fldtab->icol.num; ++fldtab) {
		for (i = 0; fldtab->icol.num != clist[i].num; i++)
			;
		fldtab->icol.p = clist + i;
		if (!fldtab->tcol.num)
			continue;
		for (i = 0; fldtab->tcol.num != clist[i].num; i++)
			;
		fldtab->tcol.p = clist + i;
	}
}

/*
 * interprets a column in a -k field
 */
char *
setcolumn(char *pos, struct field *cur_fld, int gflag)
{
	struct column *col;
	int tmp;

	col = cur_fld->icol.num ? (&(*cur_fld).tcol) : (&(*cur_fld).icol);
	if (sscanf(pos, "%d", &(col->num)) != 1)
		errx(2, "missing field number");
	pos++;
	while (isdigit(*pos))
		pos++;
	if (col->num <= 0 && !(col->num == 0 && col == &(cur_fld->tcol)))
		errx(2, "field numbers must be positive");
	if (*pos == '.') {
		if (!col->num)
			errx(2, "cannot indent end of line");
		pos++;
		if (sscanf(pos, "%d", &(col->indent)) != 1)
			errx(2, "missing offset");
		pos++;
		while (isdigit(*pos))
			pos++;
		if (&cur_fld->icol == col)
			col->indent--;
		if (col->indent < 0)
			errx(2, "illegal offset");
	}
	if (optval(*pos, cur_fld->tcol.num))	
		while ((tmp = optval(*pos, cur_fld->tcol.num))) {
			cur_fld->flags |= tmp;
			pos++;
	}
	if (cur_fld->icol.num == 0)
		cur_fld->icol.num = 1;
	return (pos);
}

int
setfield(char *pos, struct field *cur_fld, int gflag)
{
	int tmp;
	cur_fld->weights = ascii;
	cur_fld->mask = alltable;
	pos = setcolumn(pos, cur_fld, gflag);
	if (*pos == '\0')			/* key extends to EOL. */
		cur_fld->tcol.num = 0;
	else {
		if (*pos != ',')
			errx(2, "illegal field descriptor");
		setcolumn((++pos), cur_fld, gflag);
	}
	if (!cur_fld->flags)
		cur_fld->flags = gflag;
	tmp = cur_fld->flags;

	/*
	 * Assign appropriate mask table and weight table.
	 * If the global weights are reversed, the local field
	 * must be "re-reversed".
	 */
	if (((tmp & R) ^ (gflag & R)) && tmp & F)
		cur_fld->weights = RFtable;
	else if (tmp & F)
		cur_fld->weights = Ftable;
	else if ((tmp & R) ^ (gflag & R))
		cur_fld->weights = Rascii;
	if (tmp & I)
		cur_fld->mask = itable;
	else if (tmp & D)
		cur_fld->mask = dtable;
	cur_fld->flags |= (gflag & (BI | BT));
	if (!cur_fld->tcol.indent)	/* BT has no meaning at end of field */
		cur_fld->flags &= (D|F|I|N|R|BI);
	if (cur_fld->tcol.num && !(!(cur_fld->flags & BI)
	    && cur_fld->flags & BT) && (cur_fld->tcol.num <= cur_fld->icol.num
	    && cur_fld->tcol.indent < cur_fld->icol.indent))
		errx(2, "fields out of order");
	insertcol(cur_fld);
	return (cur_fld->tcol.num);
}

int
optval(int desc, int tcolflag)
{
	switch(desc) {
		case 'b':
			if (!tcolflag)
				return (BI);
			else
				return (BT);
		case 'd': return (D);
		case 'f': return (F);
		case 'i': return (I);
		case 'n': return (N);
		case 'r': return (R);
		default:  return (0);
	}
}

/*
 * Convert obsolescent "+pos1 [-pos2]" format to POSIX -k form.
 * Note that the conversion is tricky, see the manual for details.
 */
void
fixit(int *argc, char **argv)
{
	int i, j, n;
	long v, w, x;
	char *p, *ep;
	char buf[128], *bufp, *bufend;

	bufend = buf + sizeof(buf);
	for (i = 1; i < *argc; i++) {
		if (argv[i][0] == '+') {
			bufp = buf;
			p = argv[i] + 1;
			v = strtol(p, &ep, 10);
			if (ep == p || v < 0 ||
			    (v == LONG_MAX && errno == ERANGE))
				errx(2, "invalid field number");
			p = ep;
			if (*p == '.') {
				x = strtol(++p, &ep, 10);
				if (ep == p || x < 0 ||
				    (x == LONG_MAX && errno == ERANGE))
					errx(2, "invalid field number");
				p = ep;
				n = snprintf(bufp, bufend - bufp, "-k%ld.%ld%s",
				    v+1, x+1, p);
			} else {
				n = snprintf(bufp, bufend - bufp, "-k%ld%s",
				    v+1, p);
			}
			if (n == -1 || n >= bufend - bufp)
				errx(2, "bad field specification");
			bufp += n;

			if (argv[i+1] &&
			    argv[i+1][0] == '-' && isdigit(argv[i+1][1])) {
				p = argv[i+1] + 1;
				w = strtol(p, &ep, 10);
				if (ep == p || w < 0 ||
				    (w == LONG_MAX && errno == ERANGE))
					errx(2, "invalid field number");
				p = ep;
				x = 0;
				if (*p == '.') {
					x = strtol(++p, &ep, 10);
					if (ep == p || x < 0 ||
					    (x == LONG_MAX && errno == ERANGE))
						errx(2, "invalid field number");
					p = ep;
				}
				if (x == 0) {
					n = snprintf(bufp, bufend - bufp,
					    ",%ld%s", w, p);
				} else {
					n = snprintf(bufp, bufend - bufp,
					    ",%ld.%ld%s", w+1, x, p);
				}
				if (n == -1 || n >= bufend - bufp)
					errx(2, "bad field specification");

				/* shift over argv */
				for (j = i+1; j < *argc; j++)
					argv[j] = argv[j+1];
				*argc -= 1;
			}
			if ((argv[i] = strdup(buf)) == NULL)
				err(2, NULL);
		}
	}
}

/*
 * ascii, Rascii, Ftable, and RFtable map
 * REC_D -> REC_D;  {not REC_D} -> {not REC_D}.
 * gweights maps REC_D -> (0 or 255); {not REC_D} -> {not gweights[REC_D]}.
 * Note: when sorting in forward order, to encode character zero in a key,
 * use \001\001; character 1 becomes \001\002.  In this case, character 0
 * is reserved for the field delimiter.  Analagously for -r (fld_d = 255).
 * Note: this is only good for ASCII sorting.  For different LC 's,
 * all bets are off.  See also num_init in number.c
 */
void
settables(int gflags)
{
	u_char *wts;
	int i, incr;
	for (i=0; i < 256; i++) {
		ascii[i] = i;
		if (i > REC_D && i < 255 - REC_D+1)
			Rascii[i] = 255 - i + 1;
		else
			Rascii[i] = 255 - i;
		if (islower(i)) {
			Ftable[i] = Ftable[i- ('a' -'A')];
			RFtable[i] = RFtable[i - ('a' - 'A')];
		} else if (REC_D>= 'A' && REC_D < 'Z' && i < 'a' && i > REC_D) {
			Ftable[i] = i + 1;
			RFtable[i] = Rascii[i] - 1;
		} else {
			Ftable[i] = i;
			RFtable[i] = Rascii[i];
		}
		alltable[i] = 1;
		if (i == '\n' || isprint(i))
			itable[i] = 1;
		else itable[i] = 0;
		if (i == '\n' || i == '\t' || i == ' ' || isalnum(i))
			dtable[i] = 1;
		else dtable[i] = 0;
	}
	Rascii[REC_D] = RFtable[REC_D] = REC_D;
	if (REC_D >= 'A' && REC_D < 'Z')
		Ftable[REC_D + ('a' - 'A')]++;
	if (gflags & R && (!(gflags & F) || !SINGL_FLD))
		wts = Rascii;
	else if (!(gflags & F) || !SINGL_FLD)
		wts = ascii;
	else if (gflags & R)
		wts = RFtable;
	else
		wts = Ftable;
	memmove(gweights, wts, sizeof(gweights));
	incr = (gflags & R) ? -1 : 1;
	for (i = 0; i < REC_D; i++)
		gweights[i] += incr;
	gweights[REC_D] = ((gflags & R) ? 255 : 0);
	if (SINGL_FLD && gflags & F) {
		for (i = 0; i < REC_D; i++) {
			ascii[i] += incr;
			Rascii[i] += incr;
		}
		ascii[REC_D] = Rascii[REC_D] = gweights[REC_D];
	}
}