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.
515 lines
11 KiB
C
515 lines
11 KiB
C
/*-
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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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* 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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#ifndef lint
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#if 0
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static char sccsid[] = "@(#)parse.c 8.1 (Berkeley) 6/6/93";
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#endif
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#endif /* not lint */
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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 <err.h>
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#include <fcntl.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <ctype.h>
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#include <string.h>
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#include "hexdump.h"
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FU *endfu; /* format at end-of-data */
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void
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addfile(const char *name)
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{
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unsigned char *p;
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FILE *fp;
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int ch;
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char buf[2048 + 1];
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if ((fp = fopen(name, "r")) == NULL)
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err(1, "%s", name);
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while (fgets(buf, sizeof(buf), fp)) {
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if (!(p = strchr(buf, '\n'))) {
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warnx("line too long");
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while ((ch = getchar()) != '\n' && ch != EOF);
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continue;
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}
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*p = '\0';
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for (p = buf; *p && isspace(*p); ++p);
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if (!*p || *p == '#')
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continue;
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add(p);
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}
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(void)fclose(fp);
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}
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void
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add(const char *fmt)
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{
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unsigned const char *p, *savep;
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static FS **nextfs;
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FS *tfs;
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FU *tfu, **nextfu;
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/* start new linked list of format units */
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if ((tfs = calloc(1, sizeof(FS))) == NULL)
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err(1, NULL);
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if (!fshead)
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fshead = tfs;
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else
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*nextfs = tfs;
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nextfs = &tfs->nextfs;
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nextfu = &tfs->nextfu;
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/* take the format string and break it up into format units */
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for (p = fmt;;) {
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/* skip leading white space */
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for (; isspace(*p); ++p);
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if (!*p)
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break;
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/* allocate a new format unit and link it in */
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if ((tfu = calloc(1, sizeof(FU))) == NULL)
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err(1, NULL);
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*nextfu = tfu;
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nextfu = &tfu->nextfu;
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tfu->reps = 1;
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/* if leading digit, repetition count */
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if (isdigit(*p)) {
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for (savep = p; isdigit(*p); ++p);
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if (!isspace(*p) && *p != '/')
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badfmt(fmt);
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/* may overwrite either white space or slash */
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tfu->reps = atoi(savep);
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tfu->flags = F_SETREP;
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/* skip trailing white space */
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for (++p; isspace(*p); ++p);
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}
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/* skip slash and trailing white space */
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if (*p == '/')
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while (isspace(*++p));
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/* byte count */
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if (isdigit(*p)) {
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for (savep = p; isdigit(*p); ++p);
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if (!isspace(*p))
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badfmt(fmt);
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tfu->bcnt = atoi(savep);
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/* skip trailing white space */
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for (++p; isspace(*p); ++p);
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}
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/* format */
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if (*p != '"')
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badfmt(fmt);
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for (savep = ++p; *p != '"';)
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if (*p++ == 0)
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badfmt(fmt);
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if (!(tfu->fmt = malloc(p - savep + 1)))
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err(1, NULL);
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(void) strlcpy(tfu->fmt, savep, p - savep + 1);
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escape(tfu->fmt);
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p++;
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}
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}
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static const char *spec = ".#-+ 0123456789";
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int
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size(FS *fs)
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{
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FU *fu;
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int bcnt, cursize;
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unsigned char *fmt;
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int prec;
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/* figure out the data block size needed for each format unit */
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for (cursize = 0, fu = fs->nextfu; fu; fu = fu->nextfu) {
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if (fu->bcnt) {
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cursize += fu->bcnt * fu->reps;
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continue;
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}
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for (bcnt = prec = 0, fmt = fu->fmt; *fmt; ++fmt) {
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if (*fmt != '%')
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continue;
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/*
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* skip any special chars -- save precision in
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* case it's a %s format.
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*/
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while (strchr(spec + 1, *++fmt));
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if (*fmt == '.' && isdigit(*++fmt)) {
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prec = atoi(fmt);
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while (isdigit(*++fmt));
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}
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switch(*fmt) {
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case 'c':
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bcnt += 1;
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break;
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case 'd': case 'i': case 'o': case 'u':
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case 'x': case 'X':
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bcnt += 4;
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break;
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case 'e': case 'E': case 'f': case 'g': case 'G':
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bcnt += 8;
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break;
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case 's':
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bcnt += prec;
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break;
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case '_':
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switch(*++fmt) {
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case 'c': case 'p': case 'u':
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bcnt += 1;
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break;
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}
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}
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}
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cursize += bcnt * fu->reps;
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}
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return (cursize);
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}
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void
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rewrite(FS *fs)
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{
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enum { NOTOKAY, USEBCNT, USEPREC } sokay;
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PR *pr, **nextpr;
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FU *fu;
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unsigned char *p1, *p2, *fmtp;
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char savech, cs[3];
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int nconv, prec;
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prec = 0;
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for (fu = fs->nextfu; fu; fu = fu->nextfu) {
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/*
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* Break each format unit into print units; each conversion
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* character gets its own.
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*/
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nextpr = &fu->nextpr;
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for (nconv = 0, fmtp = fu->fmt; *fmtp; nextpr = &pr->nextpr) {
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if ((pr = calloc(1, sizeof(PR))) == NULL)
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err(1, NULL);
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*nextpr = pr;
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/* Skip preceding text and up to the next % sign. */
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for (p1 = fmtp; *p1 && *p1 != '%'; ++p1);
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/* Only text in the string. */
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if (!*p1) {
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pr->fmt = fmtp;
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pr->flags = F_TEXT;
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break;
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}
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/*
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* Get precision for %s -- if have a byte count, don't
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* need it.
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*/
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if (fu->bcnt) {
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sokay = USEBCNT;
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/* Skip to conversion character. */
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for (++p1; strchr(spec, *p1); ++p1);
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} else {
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/* Skip any special chars, field width. */
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while (strchr(spec + 1, *++p1));
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if (*p1 == '.' && isdigit(*++p1)) {
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sokay = USEPREC;
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prec = atoi(p1);
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while (isdigit(*++p1));
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} else
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sokay = NOTOKAY;
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}
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p2 = *p1 ? p1 + 1 : p1; /* Set end pointer -- make sure
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* that it's non-NUL/-NULL first
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* though. */
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cs[0] = *p1; /* Set conversion string. */
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cs[1] = '\0';
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/*
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* Figure out the byte count for each conversion;
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* rewrite the format as necessary, set up blank-
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* padding for end of data.
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*/
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switch(cs[0]) {
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case 'c':
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pr->flags = F_CHAR;
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switch(fu->bcnt) {
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case 0: case 1:
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pr->bcnt = 1;
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break;
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default:
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p1[1] = '\0';
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badcnt(p1);
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}
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break;
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case 'd': case 'i':
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pr->flags = F_INT;
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goto isint;
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case 'o': case 'u': case 'x': case 'X':
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pr->flags = F_UINT;
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isint: cs[2] = '\0';
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cs[1] = cs[0];
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cs[0] = 'q';
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switch(fu->bcnt) {
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case 0: case 4:
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pr->bcnt = 4;
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break;
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case 1:
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pr->bcnt = 1;
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break;
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case 2:
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pr->bcnt = 2;
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break;
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default:
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p1[1] = '\0';
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badcnt(p1);
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}
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break;
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case 'e': case 'E': case 'f': case 'g': case 'G':
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pr->flags = F_DBL;
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switch(fu->bcnt) {
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case 0: case 8:
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pr->bcnt = 8;
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break;
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case 4:
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pr->bcnt = 4;
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break;
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default:
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if (fu->bcnt == sizeof(long double)) {
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cs[2] = '\0';
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cs[1] = cs[0];
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cs[0] = 'L';
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pr->bcnt = sizeof(long double);
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} else {
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p1[1] = '\0';
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badcnt(p1);
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}
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}
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break;
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case 's':
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pr->flags = F_STR;
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switch(sokay) {
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case NOTOKAY:
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badsfmt();
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case USEBCNT:
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pr->bcnt = fu->bcnt;
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break;
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case USEPREC:
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pr->bcnt = prec;
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break;
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}
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break;
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case '_':
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++p2;
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switch(p1[1]) {
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case 'A':
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endfu = fu;
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fu->flags |= F_IGNORE;
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/* FALLTHROUGH */
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case 'a':
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pr->flags = F_ADDRESS;
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++p2;
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switch(p1[2]) {
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case 'd': case 'o': case'x':
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cs[0] = 'q';
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cs[1] = p1[2];
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cs[2] = '\0';
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break;
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default:
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p1[3] = '\0';
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badconv(p1);
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}
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break;
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case 'c':
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pr->flags = F_C;
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/* cs[0] = 'c'; set in conv_c */
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goto isint2;
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case 'p':
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pr->flags = F_P;
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cs[0] = 'c';
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goto isint2;
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case 'u':
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pr->flags = F_U;
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/* cs[0] = 'c'; set in conv_u */
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isint2: switch(fu->bcnt) {
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case 0: case 1:
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pr->bcnt = 1;
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break;
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default:
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p1[2] = '\0';
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badcnt(p1);
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}
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break;
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default:
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p1[2] = '\0';
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badconv(p1);
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}
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break;
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default:
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p1[1] = '\0';
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badconv(p1);
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}
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/*
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* Copy to PR format string, set conversion character
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* pointer, update original.
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*/
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savech = *p2;
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p1[0] = '\0';
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if (asprintf(&pr->fmt, "%s%s", fmtp, cs) == -1)
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err(1, NULL);
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*p2 = savech;
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pr->cchar = pr->fmt + (p1 - fmtp);
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fmtp = p2;
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/* Only one conversion character if byte count. */
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if (!(pr->flags&F_ADDRESS) && fu->bcnt && nconv++)
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errx(1, "byte count with multiple conversion characters");
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}
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/*
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* If format unit byte count not specified, figure it out
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* so can adjust rep count later.
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*/
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if (!fu->bcnt)
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for (pr = fu->nextpr; pr; pr = pr->nextpr)
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fu->bcnt += pr->bcnt;
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}
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/*
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* If the format string interprets any data at all, and it's
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* not the same as the blocksize, and its last format unit
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* interprets any data at all, and has no iteration count,
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* repeat it as necessary.
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*
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* If, rep count is greater than 1, no trailing whitespace
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* gets output from the last iteration of the format unit.
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*/
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for (fu = fs->nextfu; fu; fu = fu->nextfu) {
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if (!fu->nextfu && fs->bcnt < blocksize &&
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!(fu->flags&F_SETREP) && fu->bcnt)
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fu->reps += (blocksize - fs->bcnt) / fu->bcnt;
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if (fu->reps > 1) {
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for (pr = fu->nextpr;; pr = pr->nextpr)
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if (!pr->nextpr)
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break;
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for (p1 = pr->fmt, p2 = NULL; *p1; ++p1)
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p2 = isspace(*p1) ? p1 : NULL;
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if (p2)
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pr->nospace = p2;
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}
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}
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#ifdef DEBUG
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for (fu = fs->nextfu; fu; fu = fu->nextfu) {
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(void)printf("fmt:");
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for (pr = fu->nextpr; pr; pr = pr->nextpr)
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(void)printf(" {%s}", pr->fmt);
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(void)printf("\n");
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}
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#endif
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}
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void
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escape(char *p1)
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{
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char *p2;
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/* alphabetic escape sequences have to be done in place */
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for (p2 = p1;; p1++, p2++) {
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if (*p1 == '\\') {
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p1++;
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switch(*p1) {
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case '\0':
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*p2 = '\\';
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*++p2 = '\0';
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return;
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case 'a':
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/* *p2 = '\a'; */
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*p2 = '\007';
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break;
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case 'b':
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*p2 = '\b';
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break;
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case 'f':
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*p2 = '\f';
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break;
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case 'n':
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*p2 = '\n';
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break;
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case 'r':
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*p2 = '\r';
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break;
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case 't':
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*p2 = '\t';
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break;
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case 'v':
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*p2 = '\v';
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break;
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default:
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*p2 = *p1;
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break;
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}
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} else {
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*p2 = *p1;
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if (*p1 == '\0')
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return;
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}
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}
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}
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void
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badcnt(const char *s)
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{
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errx(1, "%s: bad byte count", s);
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}
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void
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badsfmt(void)
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{
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errx(1, "%%s: requires a precision or a byte count");
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}
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void
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badfmt(const char *fmt)
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{
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errx(1, "\"%s\": bad format", fmt);
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}
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void
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badconv(const char *ch)
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{
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errx(1, "%%%s: bad conversion character", ch);
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}
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