8a16b7a18f
Mainly focus on files that use BSD 3-Clause license. The Software Package Data Exchange (SPDX) group provides a specification to make it easier for automated tools to detect and summarize well known opensource licenses. We are gradually adopting the specification, noting that the tags are considered only advisory and do not, in any way, superceed or replace the license texts. Special thanks to Wind River for providing access to "The Duke of Highlander" tool: an older (2014) run over FreeBSD tree was useful as a starting point.
473 lines
8.7 KiB
C
473 lines
8.7 KiB
C
/* $OpenBSD: misc.c,v 1.46 2015/12/07 14:12:46 espie Exp $ */
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/* $NetBSD: misc.c,v 1.6 1995/09/28 05:37:41 tls Exp $ */
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/*-
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* SPDX-License-Identifier: BSD-3-Clause
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*
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* Copyright (c) 1989, 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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* Ozan Yigit at York University.
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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 <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/types.h>
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#include <errno.h>
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#include <unistd.h>
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#include <stdarg.h>
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#include <stdio.h>
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#include <stdint.h>
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#include <stdlib.h>
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#include <stddef.h>
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#include <string.h>
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#include <err.h>
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#include "mdef.h"
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#include "stdd.h"
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#include "extern.h"
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#include "pathnames.h"
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char *ep; /* first free char in strspace */
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static char *strspace; /* string space for evaluation */
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char *endest; /* end of string space */
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static size_t strsize = STRSPMAX;
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static size_t bufsize = BUFSIZE;
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unsigned char *buf; /* push-back buffer */
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unsigned char *bufbase; /* the base for current ilevel */
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unsigned char *bbase[MAXINP]; /* the base for each ilevel */
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unsigned char *bp; /* first available character */
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unsigned char *endpbb; /* end of push-back buffer */
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/*
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* find the index of second str in the first str.
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*/
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ptrdiff_t
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indx(const char *s1, const char *s2)
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{
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char *t;
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t = strstr(s1, s2);
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if (t == NULL)
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return (-1);
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else
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return (t - s1);
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}
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/*
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* pushback - push character back onto input
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*/
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void
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pushback(int c)
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{
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if (c == EOF)
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return;
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if (bp >= endpbb)
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enlarge_bufspace();
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*bp++ = c;
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}
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/*
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* pbstr - push string back onto input
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* pushback is replicated to improve
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* performance.
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*/
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void
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pbstr(const char *s)
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{
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size_t n;
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n = strlen(s);
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while (endpbb - bp <= (long)n)
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enlarge_bufspace();
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while (n > 0)
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*bp++ = s[--n];
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}
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/*
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* pbnum - convert number to string, push back on input.
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*/
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void
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pbnum(int n)
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{
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pbnumbase(n, 10, 0);
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}
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void
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pbnumbase(int n, int base, int d)
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{
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static char digits[36] = "0123456789abcdefghijklmnopqrstuvwxyz";
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int num;
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int printed = 0;
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if (base > 36)
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m4errx(1, "base %d > 36: not supported.", base);
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if (base < 2)
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m4errx(1, "bad base %d for conversion.", base);
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num = (n < 0) ? -n : n;
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do {
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pushback(digits[num % base]);
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printed++;
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}
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while ((num /= base) > 0);
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if (n < 0)
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printed++;
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while (printed++ < d)
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pushback('0');
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if (n < 0)
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pushback('-');
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}
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/*
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* pbunsigned - convert unsigned long to string, push back on input.
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*/
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void
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pbunsigned(unsigned long n)
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{
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do {
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pushback(n % 10 + '0');
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}
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while ((n /= 10) > 0);
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}
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void
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initspaces(void)
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{
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int i;
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strspace = xalloc(strsize+1, NULL);
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ep = strspace;
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endest = strspace+strsize;
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buf = xalloc(bufsize, NULL);
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bufbase = buf;
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bp = buf;
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endpbb = buf + bufsize;
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for (i = 0; i < MAXINP; i++)
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bbase[i] = buf;
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}
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void
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enlarge_strspace(void)
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{
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char *newstrspace;
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int i;
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strsize *= 2;
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newstrspace = malloc(strsize + 1);
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if (!newstrspace)
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errx(1, "string space overflow");
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memcpy(newstrspace, strspace, strsize/2);
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for (i = 0; i <= sp; i++)
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if (sstack[i] == STORAGE_STRSPACE)
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mstack[i].sstr = (mstack[i].sstr - strspace)
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+ newstrspace;
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ep = (ep-strspace) + newstrspace;
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free(strspace);
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strspace = newstrspace;
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endest = strspace + strsize;
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}
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void
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enlarge_bufspace(void)
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{
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unsigned char *newbuf;
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int i;
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bufsize += bufsize/2;
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newbuf = xrealloc(buf, bufsize, "too many characters pushed back");
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for (i = 0; i < MAXINP; i++)
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bbase[i] = (bbase[i]-buf)+newbuf;
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bp = (bp-buf)+newbuf;
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bufbase = (bufbase-buf)+newbuf;
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buf = newbuf;
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endpbb = buf+bufsize;
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}
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/*
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* chrsave - put single char on string space
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*/
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void
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chrsave(int c)
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{
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if (ep >= endest)
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enlarge_strspace();
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*ep++ = c;
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}
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/*
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* read in a diversion file, and dispose it.
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*/
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void
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getdiv(int n)
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{
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int c;
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if (active == outfile[n])
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m4errx(1, "undivert: diversion still active.");
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rewind(outfile[n]);
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while ((c = getc(outfile[n])) != EOF)
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putc(c, active);
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(void) fclose(outfile[n]);
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outfile[n] = NULL;
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}
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void
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onintr(int signo __unused)
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{
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#define intrmessage "m4: interrupted.\n"
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write(STDERR_FILENO, intrmessage, sizeof(intrmessage)-1);
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_exit(1);
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}
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/*
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* killdiv - get rid of the diversion files
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*/
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void
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killdiv(void)
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{
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int n;
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for (n = 0; n < maxout; n++)
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if (outfile[n] != NULL) {
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(void) fclose(outfile[n]);
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}
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}
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extern char *__progname;
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void
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m4errx(int eval, const char *fmt, ...)
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{
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fprintf(stderr, "%s: ", __progname);
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fprintf(stderr, "%s at line %lu: ", CURRENT_NAME, CURRENT_LINE);
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if (fmt != NULL) {
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va_list ap;
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va_start(ap, fmt);
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vfprintf(stderr, fmt, ap);
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va_end(ap);
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}
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fprintf(stderr, "\n");
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exit(eval);
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}
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/*
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* resizedivs: allocate more diversion files */
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void
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resizedivs(int n)
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{
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int i;
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outfile = xreallocarray(outfile, n, sizeof(FILE *),
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"too many diverts %d", n);
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for (i = maxout; i < n; i++)
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outfile[i] = NULL;
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maxout = n;
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}
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void *
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xalloc(size_t n, const char *fmt, ...)
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{
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void *p = malloc(n);
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if (p == NULL) {
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if (fmt == NULL)
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err(1, "malloc");
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else {
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va_list va;
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va_start(va, fmt);
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verr(1, fmt, va);
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va_end(va);
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}
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}
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return p;
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}
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void *
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xcalloc(size_t n, size_t s, const char *fmt, ...)
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{
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void *p = calloc(n, s);
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if (p == NULL) {
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if (fmt == NULL)
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err(1, "calloc");
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else {
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va_list va;
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va_start(va, fmt);
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verr(1, fmt, va);
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va_end(va);
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}
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}
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return p;
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}
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void *
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xrealloc(void *old, size_t n, const char *fmt, ...)
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{
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char *p = realloc(old, n);
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if (p == NULL) {
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free(old);
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if (fmt == NULL)
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err(1, "realloc");
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else {
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va_list va;
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va_start(va, fmt);
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verr(1, fmt, va);
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va_end(va);
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}
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}
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return p;
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}
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void *
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xreallocarray(void *old, size_t s1, size_t s2, const char *fmt, ...)
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{
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void *p = reallocarray(old, s1, s2);
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if (p == NULL) {
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free(old);
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if (fmt == NULL)
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err(1, "reallocarray");
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else {
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va_list va;
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va_start(va, fmt);
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verr(1, fmt, va);
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va_end(va);
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}
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}
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return p;
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}
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char *
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xstrdup(const char *s)
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{
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char *p = strdup(s);
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if (p == NULL)
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err(1, "strdup");
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return p;
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}
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void
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usage(void)
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{
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fprintf(stderr, "usage: m4 [-gPs] [-Dname[=value]] [-d flags] "
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"[-I dirname] [-o filename]\n"
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"\t[-t macro] [-Uname] [file ...]\n");
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exit(1);
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}
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int
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obtain_char(struct input_file *f)
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{
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if (f->c == EOF)
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return EOF;
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f->c = fgetc(f->file);
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if (f->c == '\n')
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f->lineno++;
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return f->c;
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}
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void
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set_input(struct input_file *f, FILE *real, const char *name)
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{
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f->file = real;
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f->lineno = 1;
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f->c = 0;
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f->name = xstrdup(name);
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emit_synchline();
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}
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void
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do_emit_synchline(void)
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{
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fprintf(active, "#line %lu \"%s\"\n",
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infile[ilevel].lineno, infile[ilevel].name);
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infile[ilevel].synch_lineno = infile[ilevel].lineno;
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}
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void
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release_input(struct input_file *f)
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{
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if (ferror(f->file))
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errx(1, "Fatal error reading from %s\n", f->name);
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if (f->file != stdin)
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fclose(f->file);
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f->c = EOF;
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/*
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* XXX can't free filename, as there might still be
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* error information pointing to it.
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*/
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}
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void
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doprintlineno(struct input_file *f)
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{
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pbunsigned(f->lineno);
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}
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void
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doprintfilename(struct input_file *f)
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{
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pbstr(rquote);
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pbstr(f->name);
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pbstr(lquote);
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}
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/*
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* buffer_mark/dump_buffer: allows one to save a mark in a buffer,
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* and later dump everything that was added since then to a file.
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*/
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size_t
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buffer_mark(void)
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{
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return bp - buf;
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}
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void
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dump_buffer(FILE *f, size_t m)
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{
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unsigned char *s;
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for (s = bp; s-buf > (long)m;)
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fputc(*--s, f);
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}
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