/* $NetBSD: init.c,v 1.29 2013/10/18 20:47:06 christos 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"
#include <ctype.h>
#include <string.h>
static void insertcol(struct field *);
static const char *setcolumn(const char *, struct field *);
/*
* masks of ignored characters.
*/
static unsigned char 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(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(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(const char *pos, struct field *cur_fld)
{
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(const char *pos, struct field *cur_fld, int gflag)
{
cur_fld->mask = NULL;
pos = setcolumn(pos, cur_fld);
if (*pos == '\0') /* key extends to EOL. */
cur_fld->tcol.num = 0;
else {
if (*pos != ',')
errx(2, "illegal field descriptor");
setcolumn((++pos), cur_fld);
}
if (!cur_fld->flags)
cur_fld->flags = gflag;
if (REVERSE)
/* A local 'r' doesn't invert the global one */
cur_fld->flags &= ~R;
/* Assign appropriate mask table and weight table. */
cur_fld->weights = weight_tables[cur_fld->flags & (R | F)];
if (cur_fld->flags & I)
cur_fld->mask = itable;
else if (cur_fld->flags & 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
/* indent if 0 -> end of field, i.e. okay */
&& cur_fld->tcol.indent != 0
&& 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 'l': return L;
case 'n': return N;
case 'r': return R;
default: return 0;
}
}
/*
* Return true if the options found in ARG, according to the getopt
* spec in OPTS, require an additional argv word as an option
* argument.
*/
static int
options_need_argument(const char *arg, const char *opts)
{
size_t pos;
const char *s;
/*assert(arg[0] == '-');*/
pos = 1;
while (arg[pos]) {
s = strchr(opts, arg[pos]);
if (s == NULL) {
/* invalid option */
return 0;
}
if (s[1] == ':') {
/* option requires argument */
if (arg[pos+1] == '\0') {
/* no argument in this arg */
return 1;
}
else {
/* argument is in this arg; no more options */
return 0;
}
}
pos++;
}
return 0;
}
/*
* Replace historic +SPEC arguments with appropriate -kSPEC.
*
* The form can be either a single +SPEC or a pair +SPEC -SPEC.
* The following -SPEC is not recognized unless it follows
* immediately.
*/
void
fixit(int *argc, char **argv, const char *opts)
{
int i, j, sawplus;
char *vpos, *tpos, spec[20];
int col, indent;
sawplus = 0;
for (i = 1; i < *argc; i++) {
/*
* This loop must stop exactly where getopt will stop.
* Otherwise it turns e.g. "sort x +3" into "sort x
* -k4.1", which will croak if +3 was in fact really a
* file name. In order to do this reliably we need to
* be able to identify argv words that are option
* arguments.
*/
if (!strcmp(argv[i], "--")) {
/* End of options; stop. */
break;
}
if (argv[i][0] == '+') {
/* +POS argument */
sawplus = 1;
} else if (argv[i][0] == '-' && sawplus &&
isdigit((unsigned char)argv[i][1])) {
/* -POS argument */
sawplus = 0;
} else if (argv[i][0] == '-') {
/* other option */
sawplus = 0;
if (options_need_argument(argv[i], opts)) {
/* skip over the argument */
i++;
}
continue;
} else {
/* not an option at all; stop */
sawplus = 0;
break;
}
/*
* At this point argv[i] is an old-style spec. The
* sawplus flag used by the above loop logic also
* tells us if it's a +SPEC or -SPEC.
*/
/* 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 now points to the optional flags */
/*
* In the traditional form, x.0 means beginning of line;
* in the new form, x.0 means end of line. Adjust the
* value of INDENT accordingly.
*/
if (sawplus) {
/* +POS */
col += 1;
indent += 1;
} else {
/* -POS */
if (indent > 0)
col += 1;
}
/* make the new style spec */
(void)snprintf(spec, sizeof(spec), "%d.%d%s", col, indent,
tpos);
if (sawplus) {
/* Replace the +POS argument with new-style -kSPEC */
asprintf(&vpos, "-k%s", spec);
argv[i] = vpos;
} else {
/*
* Append the spec to the one from the
* preceding +POS argument, and remove the
* current argv element entirely.
*/
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
*
* Sorting 'weight' tables.
* Convert 'ascii' characters into their sort order.
* The 'F' variants fold lower case to upper equivalent
* The 'R' variants are for reverse sorting.
*
* The record separator (REC_D) never needs a weight, this frees one
* byte value as an 'end of key' marker. This must be 0 for normal
* weight tables, and 0xff for reverse weight tables - and is used
* to terminate keys so that short keys sort before (after if reverse)
* longer keys.
*
* The field separator has a normal weight - although it cannot occur
* within a key unless it is the default (space+tab).
*
* All other bytes map to the appropriate value for the sort order.
* Numeric sorts don't need any tables, they are reversed by negation.
*
* Global reverse sorts are done by writing the sorted keys in reverse
* order - the sort itself is stil forwards.
* This means that weights are only ever used when generating keys, any
* sort of the original data bytes is always forwards and unweighted.
*
* Note: this is only good for ASCII sorting. For different LC 's,
* all bets are off.
*
* itable[] and dtable[] are the masks for -i (ignore non-printables)
* and -d (only sort blank and alphanumerics).
*/
void
settables(void)
{
int i;
int next_weight = 1;
int rev_weight = 254;
ascii[REC_D] = 0;
Rascii[REC_D] = 255;
Ftable[REC_D] = 0;
RFtable[REC_D] = 255;
for (i = 0; i < 256; i++) {
if (i == REC_D)
continue;
ascii[i] = next_weight;
Rascii[i] = rev_weight;
if (Ftable[i] == 0) {
Ftable[i] = next_weight;
RFtable[i] = rev_weight;
Ftable[tolower(i)] = next_weight;
RFtable[tolower(i)] = rev_weight;
}
next_weight++;
rev_weight--;
if (i == '\n' || isprint(i))
itable[i] = 1;
if (i == '\n' || i == '\t' || i == ' ' || isalnum(i))
dtable[i] = 1;
}
}
