448 lines
12 KiB
C
448 lines
12 KiB
C
/* $NetBSD: init.c,v 1.29 2013/10/18 20:47:06 christos Exp $ */
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/*-
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* Copyright (c) 2000-2003 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Ben Harris and Jaromir Dolecek.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/*-
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* Copyright (c) 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Peter McIlroy.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include "sort.h"
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__RCSID("$NetBSD: init.c,v 1.29 2013/10/18 20:47:06 christos Exp $");
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#include <ctype.h>
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#include <string.h>
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static void insertcol(struct field *);
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static const char *setcolumn(const char *, struct field *);
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/*
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* masks of ignored characters.
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*/
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static u_char dtable[NBINS], itable[NBINS];
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/*
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* parsed key options
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*/
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struct coldesc *clist = NULL;
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int ncols = 0;
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/*
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* clist (list of columns which correspond to one or more icol or tcol)
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* is in increasing order of columns.
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* Fields are kept in increasing order of fields.
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*/
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/*
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* keep clist in order--inserts a column in a sorted array
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*/
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static void
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insertcol(struct field *field)
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{
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int i;
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struct coldesc *p;
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/* Make space for new item */
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p = realloc(clist, (ncols + 2) * sizeof(*clist));
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if (!p)
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err(1, "realloc");
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clist = p;
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memset(&clist[ncols], 0, sizeof(clist[ncols]));
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for (i = 0; i < ncols; i++)
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if (field->icol.num <= clist[i].num)
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break;
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if (field->icol.num != clist[i].num) {
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memmove(clist+i+1, clist+i, sizeof(COLDESC)*(ncols-i));
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clist[i].num = field->icol.num;
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ncols++;
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}
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if (field->tcol.num && field->tcol.num != field->icol.num) {
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for (i = 0; i < ncols; i++)
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if (field->tcol.num <= clist[i].num)
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break;
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if (field->tcol.num != clist[i].num) {
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memmove(clist+i+1, clist+i,sizeof(COLDESC)*(ncols-i));
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clist[i].num = field->tcol.num;
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ncols++;
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}
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}
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}
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/*
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* matches fields with the appropriate columns--n^2 but who cares?
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*/
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void
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fldreset(struct field *fldtab)
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{
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int i;
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fldtab[0].tcol.p = clist + ncols - 1;
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for (++fldtab; fldtab->icol.num; ++fldtab) {
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for (i = 0; fldtab->icol.num != clist[i].num; i++)
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;
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fldtab->icol.p = clist + i;
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if (!fldtab->tcol.num)
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continue;
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for (i = 0; fldtab->tcol.num != clist[i].num; i++)
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;
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fldtab->tcol.p = clist + i;
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}
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}
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/*
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* interprets a column in a -k field
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*/
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static const char *
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setcolumn(const char *pos, struct field *cur_fld)
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{
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struct column *col;
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char *npos;
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int tmp;
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col = cur_fld->icol.num ? (&cur_fld->tcol) : (&cur_fld->icol);
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col->num = (int) strtol(pos, &npos, 10);
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pos = npos;
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if (col->num <= 0 && !(col->num == 0 && col == &(cur_fld->tcol)))
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errx(2, "field numbers must be positive");
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if (*pos == '.') {
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if (!col->num)
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errx(2, "cannot indent end of line");
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++pos;
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col->indent = (int) strtol(pos, &npos, 10);
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pos = npos;
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if (&cur_fld->icol == col)
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col->indent--;
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if (col->indent < 0)
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errx(2, "illegal offset");
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}
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for(; (tmp = optval(*pos, cur_fld->tcol.num)); pos++)
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cur_fld->flags |= tmp;
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if (cur_fld->icol.num == 0)
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cur_fld->icol.num = 1;
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return (pos);
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}
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int
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setfield(const char *pos, struct field *cur_fld, int gflag)
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{
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cur_fld->mask = NULL;
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pos = setcolumn(pos, cur_fld);
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if (*pos == '\0') /* key extends to EOL. */
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cur_fld->tcol.num = 0;
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else {
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if (*pos != ',')
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errx(2, "illegal field descriptor");
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setcolumn((++pos), cur_fld);
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}
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if (!cur_fld->flags)
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cur_fld->flags = gflag;
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if (REVERSE)
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/* A local 'r' doesn't invert the global one */
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cur_fld->flags &= ~R;
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/* Assign appropriate mask table and weight table. */
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cur_fld->weights = weight_tables[cur_fld->flags & (R | F)];
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if (cur_fld->flags & I)
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cur_fld->mask = itable;
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else if (cur_fld->flags & D)
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cur_fld->mask = dtable;
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cur_fld->flags |= (gflag & (BI | BT));
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if (!cur_fld->tcol.indent) /* BT has no meaning at end of field */
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cur_fld->flags &= ~BT;
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if (cur_fld->tcol.num
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&& !(!(cur_fld->flags & BI) && cur_fld->flags & BT)
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&& (cur_fld->tcol.num <= cur_fld->icol.num
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/* indent if 0 -> end of field, i.e. okay */
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&& cur_fld->tcol.indent != 0
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&& cur_fld->tcol.indent < cur_fld->icol.indent))
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errx(2, "fields out of order");
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insertcol(cur_fld);
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return (cur_fld->tcol.num);
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}
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int
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optval(int desc, int tcolflag)
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{
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switch(desc) {
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case 'b':
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if (!tcolflag)
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return BI;
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else
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return BT;
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case 'd': return D;
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case 'f': return F;
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case 'i': return I;
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case 'l': return L;
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case 'n': return N;
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case 'r': return R;
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default: return 0;
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}
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}
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/*
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* Return true if the options found in ARG, according to the getopt
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* spec in OPTS, require an additional argv word as an option
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* argument.
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*/
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static int
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options_need_argument(const char *arg, const char *opts)
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{
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size_t pos;
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const char *s;
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/*assert(arg[0] == '-');*/
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pos = 1;
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while (arg[pos]) {
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s = strchr(opts, arg[pos]);
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if (s == NULL) {
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/* invalid option */
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return 0;
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}
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if (s[1] == ':') {
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/* option requires argument */
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if (arg[pos+1] == '\0') {
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/* no argument in this arg */
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return 1;
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}
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else {
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/* argument is in this arg; no more options */
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return 0;
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}
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}
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pos++;
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}
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return 0;
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}
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/*
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* Replace historic +SPEC arguments with appropriate -kSPEC.
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*
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* The form can be either a single +SPEC or a pair +SPEC -SPEC.
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* The following -SPEC is not recognized unless it follows
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* immediately.
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*/
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void
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fixit(int *argc, char **argv, const char *opts)
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{
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int i, j, sawplus;
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char *vpos, *tpos, spec[20];
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int col, indent;
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sawplus = 0;
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for (i = 1; i < *argc; i++) {
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/*
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* This loop must stop exactly where getopt will stop.
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* Otherwise it turns e.g. "sort x +3" into "sort x
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* -k4.1", which will croak if +3 was in fact really a
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* file name. In order to do this reliably we need to
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* be able to identify argv words that are option
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* arguments.
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*/
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if (!strcmp(argv[i], "--")) {
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/* End of options; stop. */
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break;
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}
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if (argv[i][0] == '+') {
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/* +POS argument */
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sawplus = 1;
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} else if (argv[i][0] == '-' && sawplus &&
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isdigit((unsigned char)argv[i][1])) {
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/* -POS argument */
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sawplus = 0;
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} else if (argv[i][0] == '-') {
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/* other option */
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sawplus = 0;
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if (options_need_argument(argv[i], opts)) {
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/* skip over the argument */
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i++;
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}
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continue;
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} else {
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/* not an option at all; stop */
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sawplus = 0;
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break;
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}
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/*
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* At this point argv[i] is an old-style spec. The
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* sawplus flag used by the above loop logic also
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* tells us if it's a +SPEC or -SPEC.
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*/
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/* parse spec */
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tpos = argv[i]+1;
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col = (int)strtol(tpos, &tpos, 10);
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if (*tpos == '.') {
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++tpos;
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indent = (int) strtol(tpos, &tpos, 10);
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} else
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indent = 0;
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/* tpos now points to the optional flags */
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/*
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* In the traditional form, x.0 means beginning of line;
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* in the new form, x.0 means end of line. Adjust the
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* value of INDENT accordingly.
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*/
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if (sawplus) {
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/* +POS */
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col += 1;
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indent += 1;
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} else {
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/* -POS */
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if (indent > 0)
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col += 1;
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}
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/* make the new style spec */
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(void)snprintf(spec, sizeof(spec), "%d.%d%s", col, indent,
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tpos);
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if (sawplus) {
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/* Replace the +POS argument with new-style -kSPEC */
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asprintf(&vpos, "-k%s", spec);
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argv[i] = vpos;
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} else {
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/*
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* Append the spec to the one from the
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* preceding +POS argument, and remove the
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* current argv element entirely.
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*/
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asprintf(&vpos, "%s,%s", argv[i-1], spec);
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free(argv[i-1]);
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argv[i-1] = vpos;
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for (j=i; j < *argc; j++)
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argv[j] = argv[j+1];
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*argc -= 1;
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i--;
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}
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}
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}
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/*
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* ascii, Rascii, Ftable, and RFtable map
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*
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* Sorting 'weight' tables.
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* Convert 'ascii' characters into their sort order.
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* The 'F' variants fold lower case to upper equivalent
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* The 'R' variants are for reverse sorting.
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*
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* The record separator (REC_D) never needs a weight, this frees one
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* byte value as an 'end of key' marker. This must be 0 for normal
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* weight tables, and 0xff for reverse weight tables - and is used
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* to terminate keys so that short keys sort before (after if reverse)
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* longer keys.
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*
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* The field separator has a normal weight - although it cannot occur
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* within a key unless it is the default (space+tab).
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*
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* All other bytes map to the appropriate value for the sort order.
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* Numeric sorts don't need any tables, they are reversed by negation.
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*
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* Global reverse sorts are done by writing the sorted keys in reverse
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* order - the sort itself is stil forwards.
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* This means that weights are only ever used when generating keys, any
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* sort of the original data bytes is always forwards and unweighted.
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*
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* Note: this is only good for ASCII sorting. For different LC 's,
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* all bets are off.
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*
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* itable[] and dtable[] are the masks for -i (ignore non-printables)
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* and -d (only sort blank and alphanumerics).
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*/
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void
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settables(void)
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{
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int i;
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int next_weight = 1;
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int rev_weight = 254;
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ascii[REC_D] = 0;
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Rascii[REC_D] = 255;
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Ftable[REC_D] = 0;
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RFtable[REC_D] = 255;
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for (i = 0; i < 256; i++) {
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if (i == REC_D)
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continue;
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ascii[i] = next_weight;
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Rascii[i] = rev_weight;
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if (Ftable[i] == 0) {
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Ftable[i] = next_weight;
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RFtable[i] = rev_weight;
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Ftable[tolower(i)] = next_weight;
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RFtable[tolower(i)] = rev_weight;
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}
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next_weight++;
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rev_weight--;
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if (i == '\n' || isprint(i))
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itable[i] = 1;
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if (i == '\n' || i == '\t' || i == ' ' || isalnum(i))
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dtable[i] = 1;
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}
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}
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