646 lines
15 KiB
C
646 lines
15 KiB
C
/*
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* Copyright (c) 1989 The Regents of the University of California.
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* 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. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. 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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/* 1999-02-22 Arkadiusz Miśkiewicz <misiek@pld.ORG.PL>
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* - added Native Language Support
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*/
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#include <sys/types.h>
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#include <sys/file.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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#include "nls.h"
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#include "xalloc.h"
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#include "strutils.h"
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#include "colors.h"
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static void escape(char *p1);
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static struct list_head *color_fmt(char *cfmt, int bcnt);
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static void __attribute__ ((__noreturn__)) badcnt(const char *s)
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{
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errx(EXIT_FAILURE, _("bad byte count for conversion character %s"), s);
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}
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static void __attribute__ ((__noreturn__)) badsfmt(void)
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{
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errx(EXIT_FAILURE, _("%%s requires a precision or a byte count"));
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}
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static void __attribute__ ((__noreturn__)) badfmt(const char *fmt)
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{
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errx(EXIT_FAILURE, _("bad format {%s}"), fmt);
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}
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static void __attribute__ ((__noreturn__)) badconv(const char *ch)
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{
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errx(EXIT_FAILURE, _("bad conversion character %%%s"), ch);
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}
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#define first_letter(s,f) strchr(f, *(s))
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struct hexdump_fu *endfu; /* format at end-of-data */
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void addfile(char *name, struct hexdump *hex)
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{
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char *fmt, *buf = NULL;
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FILE *fp;
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size_t n;
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if ((fp = fopen(name, "r")) == NULL)
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err(EXIT_FAILURE, _("can't read %s"), name);
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while (getline(&buf, &n, fp) != -1) {
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fmt = buf;
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while (*fmt && isspace(*fmt))
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++fmt;
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if (!*fmt || *fmt == '#')
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continue;
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add_fmt(fmt, hex);
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}
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free(buf);
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fclose(fp);
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}
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void add_fmt(const char *fmt, struct hexdump *hex)
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{
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const char *p, *savep;
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struct hexdump_fs *tfs;
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struct hexdump_fu *tfu;
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/* Start new linked list of format units. */
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tfs = xcalloc(1, sizeof(struct hexdump_fs));
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INIT_LIST_HEAD(&tfs->fslist);
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INIT_LIST_HEAD(&tfs->fulist);
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list_add_tail(&tfs->fslist, &hex->fshead);
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/* Take the format string and break it up into format units. */
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p = fmt;
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while (TRUE) {
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/* Skip leading white space. */
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if (!*(p = skip_space(p)))
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break;
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/* Allocate a new format unit and link it in. */
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tfu = xcalloc(1, sizeof(struct hexdump_fu));
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tfu->reps = 1;
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INIT_LIST_HEAD(&tfu->fulist);
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INIT_LIST_HEAD(&tfu->prlist);
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list_add_tail(&tfu->fulist, &tfs->fulist);
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/* If leading digit, repetition count. */
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if (isdigit(*p)) {
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savep = p;
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while (isdigit(*p) && ++p)
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;
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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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p = skip_space(++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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p = skip_space(++p);
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/* byte count */
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if (isdigit(*p)) {
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savep = p;
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while (isdigit(*p) && ++p)
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;
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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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p = skip_space(++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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savep = ++p;
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while (*p != '"') {
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if (!*p++)
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badfmt(fmt);
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}
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tfu->fmt = xmalloc(p - savep + 1);
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xstrncpy(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 block_size(struct hexdump_fs *fs)
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{
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struct hexdump_fu *fu;
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int bcnt, prec, cursize = 0;
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char *fmt;
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struct list_head *p;
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/* figure out the data block size needed for each format unit */
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list_for_each (p, &fs->fulist) {
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fu = list_entry(p, struct hexdump_fu, fulist);
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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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bcnt = prec = 0;
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fmt = fu->fmt;
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while (*fmt) {
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if (*fmt != '%') {
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++fmt;
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continue;
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}
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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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;
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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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}
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if (first_letter(fmt, "diouxX"))
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bcnt += 4;
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else if (first_letter(fmt, "efgEG"))
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bcnt += 8;
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else if (*fmt == 's')
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bcnt += prec;
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else if (*fmt == 'c' || (*fmt == '_' && first_letter(++fmt, "cpu")))
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++bcnt;
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++fmt;
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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 rewrite_rules(struct hexdump_fs *fs, struct hexdump *hex)
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{
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enum { NOTOKAY, USEBCNT, USEPREC } sokay;
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struct hexdump_pr *pr;
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struct hexdump_fu *fu;
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struct list_head *p, *q;
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char *p1, *p2, *fmtp;
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char savech, cs[4];
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int nconv, prec = 0;
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list_for_each (p, &fs->fulist) {
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fu = list_entry(p, struct hexdump_fu, fulist);
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/*
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* Break each format unit into print units; each
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* conversion character gets its own.
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*/
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nconv = 0;
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fmtp = fu->fmt;
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while (*fmtp) {
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pr = xcalloc(1, sizeof(struct hexdump_pr));
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INIT_LIST_HEAD(&pr->prlist);
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list_add_tail(&pr->prlist, &fu->prlist);
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/* Skip preceding text and up to the next % sign. */
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p1 = fmtp;
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while (*p1 && *p1 != '%')
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++p1;
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/* Only text in the string. */
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if (!*p1) {
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pr->fmt = xstrdup(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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while (++p1 && strchr(spec, *p1))
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;
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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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;
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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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;
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} else
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sokay = NOTOKAY;
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}
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p2 = p1 + 1; /* Set end pointer. */
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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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if (*cs == 'c') {
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pr->flags = F_CHAR;
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switch(fu->bcnt) {
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case 0:
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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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} else if (first_letter(cs, "di")) {
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pr->flags = F_INT;
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goto isint;
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} else if (first_letter(cs, "ouxX")) {
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pr->flags = F_UINT;
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isint: cs[3] = '\0';
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cs[2] = cs[0];
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cs[1] = 'l';
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cs[0] = 'l';
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switch(fu->bcnt) {
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case 0:
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pr->bcnt = 4;
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break;
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case 1:
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case 2:
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case 4:
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case 8:
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pr->bcnt = fu->bcnt;
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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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} else if (first_letter(cs, "efgEG")) {
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pr->flags = F_DBL;
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switch(fu->bcnt) {
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case 0:
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pr->bcnt = 8;
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break;
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case 4:
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case 8:
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pr->bcnt = fu->bcnt;
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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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} else if(*cs == '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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} else if (*cs == '_') {
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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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if (first_letter(p1 + 2, "dox")) {
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cs[0] = 'l';
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cs[1] = 'l';
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cs[2] = p1[2];
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cs[3] = '\0';
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} else {
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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:
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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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} else {
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p1[1] = '\0';
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badconv(p1);
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}
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/* Color unit(s) specified */
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if (*p2 == '_' && p2[1] == 'L') {
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if (colors_wanted()) {
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char *a;
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/* "cut out" the color_unit(s) */
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a = strchr(p2, '[');
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p2 = strrchr(p2, ']');
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if (a++ && p2)
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pr->colorlist = color_fmt(xstrndup(a, p2++ - a), pr->bcnt);
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else
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badconv(p2);
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}
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/* we don't want colors, quietly skip over them */
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else {
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p2 = strrchr(p2, ']');
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/* be a bit louder if we don't know how to skip over them */
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if (!p2)
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badconv("_L");
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++p2;
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}
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}
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/*
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* Copy to hexdump_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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pr->fmt = xmalloc(strlen(fmtp) + strlen(cs) + 1);
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strcpy(pr->fmt, fmtp);
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strcat(pr->fmt, cs);
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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(EXIT_FAILURE,
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_("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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list_for_each(q, &fu->prlist)
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fu->bcnt
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+= (list_entry(q, struct hexdump_pr, prlist))->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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list_for_each (p, &fs->fulist) {
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fu = list_entry(p, struct hexdump_fu, fulist);
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if (list_entry_is_last(&fu->fulist, &fs->fulist) &&
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fs->bcnt < hex->blocksize &&
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!(fu->flags&F_SETREP) && fu->bcnt)
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fu->reps += (hex->blocksize - fs->bcnt) / fu->bcnt;
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if (fu->reps > 1 && !list_empty(&fu->prlist)) {
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pr = list_last_entry(&fu->prlist, struct hexdump_pr, prlist);
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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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}
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/* [!]color[:string|:hex_number|:oct_number][@offt|@offt_start-offt_end],... */
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static struct list_head *color_fmt(char *cfmt, int bcnt)
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{
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struct hexdump_clr *hc, *hcnext;
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struct list_head *ret_head;
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char *clr, *fmt;
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ret_head = xmalloc(sizeof(struct list_head));
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hcnext = hc = xcalloc(1, sizeof(struct hexdump_clr));
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INIT_LIST_HEAD(&hc->colorlist);
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INIT_LIST_HEAD(ret_head);
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list_add_tail(&hc->colorlist, ret_head);
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fmt = cfmt;
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while (cfmt && *cfmt) {
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char *end;
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/* invert this condition */
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if (*cfmt == '!') {
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hcnext->invert = 1;
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++cfmt;
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}
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clr = xstrndup(cfmt, strcspn(cfmt, ":@,"));
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cfmt += strlen(clr);
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hcnext->fmt = color_sequence_from_colorname(clr);
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free(clr);
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if (!hcnext->fmt)
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return NULL;
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/* only colorize this specific value */
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if (*cfmt == ':') {
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++cfmt;
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/* a hex or oct value */
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if (*cfmt == '0') {
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/* hex */
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errno = 0;
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end = NULL;
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if (cfmt[1] == 'x' || cfmt[1] == 'X')
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hcnext->val = strtoul(cfmt + 2, &end, 16);
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else
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hcnext->val = strtoul(cfmt, &end, 8);
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if (errno || end == cfmt)
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badfmt(fmt);
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cfmt = end;
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/* a string */
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} else {
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off_t fmt_end;
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char endchar;
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char *endstr;
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hcnext->val = -1;
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/* temporarily null-delimit the format, so we can reverse-search
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* for the start of an offset specifier */
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fmt_end = strcspn(cfmt, ",");
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endchar = cfmt[fmt_end];
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cfmt[fmt_end] = '\0';
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endstr = strrchr(cfmt, '@');
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if (endstr) {
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|
if (endstr[1] != '\0')
|
|
--endstr;
|
|
hcnext->str = xstrndup(cfmt, endstr - cfmt + 1);
|
|
} else
|
|
hcnext->str = xstrndup(cfmt, fmt_end);
|
|
|
|
/* restore the character */
|
|
cfmt[fmt_end] = endchar;
|
|
cfmt += strlen(hcnext->str);
|
|
}
|
|
|
|
/* no specific value */
|
|
} else
|
|
hcnext->val = -1;
|
|
|
|
/* only colorize at this offset */
|
|
hcnext->range = bcnt;
|
|
if (cfmt && *cfmt == '@') {
|
|
errno = 0;
|
|
hcnext->offt = strtoul(++cfmt, &cfmt, 10);
|
|
if (errno)
|
|
badfmt(fmt);
|
|
|
|
/* offset range */
|
|
if (*cfmt == '-') {
|
|
++cfmt;
|
|
errno = 0;
|
|
|
|
hcnext->range =
|
|
strtoul(cfmt, &cfmt, 10) - hcnext->offt + 1;
|
|
if (errno)
|
|
badfmt(fmt);
|
|
/* offset range must be between 0 and format byte count */
|
|
if (hcnext->range < 0)
|
|
badcnt("_L");
|
|
/* the offset extends over several print units, clone
|
|
* the condition, link it in and adjust the address/offset */
|
|
while (hcnext->range > bcnt) {
|
|
hc = xcalloc(1, sizeof(struct hexdump_clr));
|
|
memcpy(hc, hcnext, sizeof(struct hexdump_clr));
|
|
|
|
hc->range = bcnt;
|
|
|
|
INIT_LIST_HEAD(&hc->colorlist);
|
|
list_add_tail(&hc->colorlist, ret_head);
|
|
|
|
hcnext->offt += bcnt;
|
|
hcnext->range -= bcnt;
|
|
}
|
|
}
|
|
/* no specific offset */
|
|
} else
|
|
hcnext->offt = (off_t)-1;
|
|
|
|
/* check if the string we're looking for is the same length as the range */
|
|
if (hcnext->str && (int)strlen(hcnext->str) != hcnext->range)
|
|
badcnt("_L");
|
|
|
|
/* link in another condition */
|
|
if (cfmt && *cfmt == ',') {
|
|
++cfmt;
|
|
|
|
hcnext = xcalloc(1, sizeof(struct hexdump_clr));
|
|
INIT_LIST_HEAD(&hcnext->colorlist);
|
|
list_add_tail(&hcnext->colorlist, ret_head);
|
|
}
|
|
}
|
|
return ret_head;
|
|
}
|
|
|
|
static void escape(char *p1)
|
|
{
|
|
char *p2;
|
|
|
|
/* alphabetic escape sequences have to be done in place */
|
|
p2 = p1;
|
|
while (TRUE) {
|
|
if (!*p1) {
|
|
*p2 = *p1;
|
|
break;
|
|
}
|
|
if (*p1 == '\\')
|
|
switch(*++p1) {
|
|
case 'a':
|
|
/* *p2 = '\a'; */
|
|
*p2 = '\007';
|
|
break;
|
|
case 'b':
|
|
*p2 = '\b';
|
|
break;
|
|
case 'f':
|
|
*p2 = '\f';
|
|
break;
|
|
case 'n':
|
|
*p2 = '\n';
|
|
break;
|
|
case 'r':
|
|
*p2 = '\r';
|
|
break;
|
|
case 't':
|
|
*p2 = '\t';
|
|
break;
|
|
case 'v':
|
|
*p2 = '\v';
|
|
break;
|
|
default:
|
|
*p2 = *p1;
|
|
break;
|
|
}
|
|
++p1; ++p2;
|
|
}
|
|
}
|