NetBSD-5.0.2/usr.bin/sort/init.c
/* $NetBSD: init.c,v 1.18 2008/04/28 20:24:15 martin Exp $ */
/*-
* Copyright (c) 2000-2003 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Ben Harris and Jaromir Dolecek.
*
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
*/
/*-
* 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"
#ifndef lint
__RCSID("$NetBSD: init.c,v 1.18 2008/04/28 20:24:15 martin Exp $");
__SCCSID("@(#)init.c 8.1 (Berkeley) 6/6/93");
#endif /* not lint */
#include <ctype.h>
#include <string.h>
static void insertcol __P((struct field *));
static const char *setcolumn __P((const char *, struct field *, int));
u_char gweights[NBINS];
/*
* masks of ignored characters. Alltable is 256 ones.
*/
static u_char alltable[NBINS], dtable[NBINS], itable[NBINS];
/*
* parsed key options
*/
struct coldesc *clist = NULL;
int ncols = 0;
/*
* 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(field)
struct field *field;
{
int i;
struct coldesc *p;
/* Make space for new item */
p = realloc(clist, (ncols + 2) * sizeof(*clist));
if (!p)
err(1, "realloc");
clist = p;
memset(&clist[ncols], 0, sizeof(clist[ncols]));
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(fldtab)
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
*/
static const char *
setcolumn(pos, cur_fld, gflag)
const char *pos;
struct field *cur_fld;
int gflag;
{
struct column *col;
char *npos;
int tmp;
col = cur_fld->icol.num ? (&cur_fld->tcol) : (&cur_fld->icol);
col->num = (int) strtol(pos, &npos, 10);
pos = npos;
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;
col->indent = (int) strtol(pos, &npos, 10);
pos = npos;
if (&cur_fld->icol == col)
col->indent--;
if (col->indent < 0)
errx(2, "illegal offset");
}
for(; (tmp = optval(*pos, cur_fld->tcol.num)); pos++)
cur_fld->flags |= tmp;
if (cur_fld->icol.num == 0)
cur_fld->icol.num = 1;
return (pos);
}
int
setfield(pos, cur_fld, gflag)
const 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 &= ~BT;
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 != 0 /* == 0 -> end of field, i.e. okay */
&& cur_fld->tcol.indent < cur_fld->icol.indent))
errx(2, "fields out of order");
insertcol(cur_fld);
return (cur_fld->tcol.num);
}
int
optval(desc, tcolflag)
int desc, 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);
}
}
/*
* Replace historic +SPEC arguments with appropriate -kSPEC.
*/
void
fixit(argc, argv)
int *argc;
char **argv;
{
int i, j, fplus=0;
char *vpos, *tpos, spec[20];
int col, indent;
size_t sz;
for (i = 1; i < *argc; i++) {
if (argv[i][0] != '+' && !fplus)
continue;
if (fplus && (argv[i][0] != '-' || !isdigit((unsigned char)argv[i][1]))) {
fplus = 0;
if (argv[i][0] != '+') {
/* not a -POS argument, skip */
continue;
}
}
/* parse spec */
tpos = argv[i]+1;
col = (int)strtol(tpos, &tpos, 10);
if (*tpos == '.') {
++tpos;
indent = (int) strtol(tpos, &tpos, 10);
} else
indent = 0;
/* tpos points to optional flags now */
/*
* For x.y, the obsolescent variant assumed 0 == beginning
* of line, while the new form uses 0 == end of line.
* Convert accordingly.
*/
if (!fplus) {
/* +POS */
col += 1;
indent += 1;
} else {
/* -POS */
if (indent > 0)
col += 1;
}
/* new style spec */
sz = snprintf(spec, sizeof(spec), "%d.%d%s", col, indent,
tpos);
if (!fplus) {
/* Replace the +POS argument with new-style -kSPEC */
asprintf(&vpos, "-k%s", spec);
argv[i] = vpos;
fplus = 1;
} else {
/*
* Append the spec to one previously generated from
* +POS argument, and remove the argv element.
*/
asprintf(&vpos, "%s,%s", argv[i-1], spec);
free(argv[i-1]);
argv[i-1] = vpos;
for (j=i; j < *argc; j++)
argv[j] = argv[j+1];
*argc -= 1;
i--;
}
}
}
/*
* 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(gflags)
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[toupper(i)];
RFtable[i] = RFtable[toupper(i)];
} 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 (isupper(REC_D))
Ftable[tolower(REC_D)]++;
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];
}
}