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-rw-r--r--text-utils/hexdump-display.c456
1 files changed, 456 insertions, 0 deletions
diff --git a/text-utils/hexdump-display.c b/text-utils/hexdump-display.c
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+++ b/text-utils/hexdump-display.c
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+/*
+ * Copyright (c) 1989 The Regents of the University of California.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ * must display the following acknowledgement:
+ * This product includes software developed by the University of
+ * California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <sys/param.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <unistd.h>
+#include <errno.h>
+#include <ctype.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include "hexdump.h"
+#include "xalloc.h"
+#include "c.h"
+#include "nls.h"
+#include "colors.h"
+
+static void doskip(const char *, int, struct hexdump *);
+static u_char *get(struct hexdump *);
+
+enum _vflag vflag = FIRST;
+
+static off_t address; /* address/offset in stream */
+static off_t eaddress; /* end address */
+
+static const char *color_cond(struct hexdump_pr *pr, unsigned char *bp, int bcnt)
+{
+ register struct list_head *p;
+ register struct hexdump_clr *clr;
+ off_t offt;
+ int match;
+
+ list_for_each(p, pr->colorlist) {
+ clr = list_entry(p, struct hexdump_clr, colorlist);
+ offt = clr->offt;
+ match = 0;
+
+ /* no offset or offset outside this print unit */
+ if (offt < 0)
+ offt = address;
+ if (offt < address || offt + clr->range > address + bcnt)
+ continue;
+
+ /* match a string */
+ if (clr->str) {
+ if (pr->flags == F_ADDRESS) {
+ /* TODO */
+ }
+ else if (!strncmp(clr->str, (char *)bp + offt
+ - address, clr->range))
+ match = 1;
+ /* match a value */
+ } else if (clr->val != -1) {
+ int val = 0;
+ /* addresses are not part of the input, so we can't
+ * compare with the contents of bp */
+ if (pr->flags == F_ADDRESS) {
+ if (clr->val == address)
+ match = 1;
+ } else {
+ memcpy(&val, bp + offt - address, clr->range);
+ if (val == clr->val)
+ match = 1;
+ }
+ /* no conditions, only a color was specified */
+ } else
+ return clr->fmt;
+
+ /* return the format string or check for another */
+ if (match ^ clr->invert)
+ return clr->fmt;
+ }
+
+ /* no match */
+ return NULL;
+}
+
+static inline void
+print(struct hexdump_pr *pr, unsigned char *bp) {
+
+ const char *color = NULL;
+
+ if (pr->colorlist && (color = color_cond(pr, bp, pr->bcnt)))
+ color_enable(color);
+
+ switch(pr->flags) {
+ case F_ADDRESS:
+ printf(pr->fmt, address);
+ break;
+ case F_BPAD:
+ printf(pr->fmt, "");
+ break;
+ case F_C:
+ conv_c(pr, bp);
+ break;
+ case F_CHAR:
+ printf(pr->fmt, *bp);
+ break;
+ case F_DBL:
+ {
+ double dval;
+ float fval;
+ switch(pr->bcnt) {
+ case 4:
+ memmove(&fval, bp, sizeof(fval));
+ printf(pr->fmt, fval);
+ break;
+ case 8:
+ memmove(&dval, bp, sizeof(dval));
+ printf(pr->fmt, dval);
+ break;
+ }
+ break;
+ }
+ case F_INT:
+ {
+ char cval; /* int8_t */
+ short sval; /* int16_t */
+ int ival; /* int32_t */
+ long long Lval; /* int64_t, int64_t */
+
+ switch(pr->bcnt) {
+ case 1:
+ memmove(&cval, bp, sizeof(cval));
+ printf(pr->fmt, (unsigned long long) cval);
+ break;
+ case 2:
+ memmove(&sval, bp, sizeof(sval));
+ printf(pr->fmt, (unsigned long long) sval);
+ break;
+ case 4:
+ memmove(&ival, bp, sizeof(ival));
+ printf(pr->fmt, (unsigned long long) ival);
+ break;
+ case 8:
+ memmove(&Lval, bp, sizeof(Lval));
+ printf(pr->fmt, Lval);
+ break;
+ }
+ break;
+ }
+ case F_P:
+ printf(pr->fmt, isprint(*bp) ? *bp : '.');
+ break;
+ case F_STR:
+ printf(pr->fmt, (char *)bp);
+ break;
+ case F_TEXT:
+ printf("%s", pr->fmt);
+ break;
+ case F_U:
+ conv_u(pr, bp);
+ break;
+ case F_UINT:
+ {
+ unsigned short sval; /* u_int16_t */
+ unsigned int ival; /* u_int32_t */
+ unsigned long long Lval;/* u_int64_t, u_int64_t */
+
+ switch(pr->bcnt) {
+ case 1:
+ printf(pr->fmt, (unsigned long long) *bp);
+ break;
+ case 2:
+ memmove(&sval, bp, sizeof(sval));
+ printf(pr->fmt, (unsigned long long) sval);
+ break;
+ case 4:
+ memmove(&ival, bp, sizeof(ival));
+ printf(pr->fmt, (unsigned long long) ival);
+ break;
+ case 8:
+ memmove(&Lval, bp, sizeof(Lval));
+ printf(pr->fmt, Lval);
+ break;
+ }
+ break;
+ }
+ }
+ if (color) /* did we colorize something? */
+ color_disable();
+}
+
+static void bpad(struct hexdump_pr *pr)
+{
+ static const char *spec = " -0+#";
+ char *p1, *p2;
+
+ /*
+ * remove all conversion flags; '-' is the only one valid
+ * with %s, and it's not useful here.
+ */
+ pr->flags = F_BPAD;
+ pr->cchar[0] = 's';
+ pr->cchar[1] = 0;
+
+ p1 = pr->fmt;
+ while (*p1 != '%')
+ ++p1;
+
+ p2 = ++p1;
+ while (*p1 && strchr(spec, *p1))
+ ++p1;
+
+ while ((*p2++ = *p1++))
+ ;
+}
+
+void display(struct hexdump *hex)
+{
+ register struct list_head *fs;
+ register struct hexdump_fs *fss;
+ register struct hexdump_fu *fu;
+ register struct hexdump_pr *pr;
+ register int cnt;
+ register unsigned char *bp;
+ off_t saveaddress;
+ unsigned char savech = 0, *savebp;
+ struct list_head *p, *q, *r;
+
+ while ((bp = get(hex)) != NULL) {
+ fs = &hex->fshead; savebp = bp; saveaddress = address;
+
+ list_for_each(p, fs) {
+ fss = list_entry(p, struct hexdump_fs, fslist);
+
+ list_for_each(q, &fss->fulist) {
+ fu = list_entry(q, struct hexdump_fu, fulist);
+
+ if (fu->flags&F_IGNORE)
+ break;
+
+ cnt = fu->reps;
+
+ while (cnt) {
+ list_for_each(r, &fu->prlist) {
+ pr = list_entry(r, struct hexdump_pr, prlist);
+
+ if (eaddress && address >= eaddress
+ && !(pr->flags&(F_TEXT|F_BPAD)))
+ bpad(pr);
+
+ if (cnt == 1 && pr->nospace) {
+ savech = *pr->nospace;
+ *pr->nospace = '\0';
+ print(pr, bp);
+ *pr->nospace = savech;
+ } else
+ print(pr, bp);
+
+ address += pr->bcnt;
+ bp += pr->bcnt;
+ }
+ --cnt;
+ }
+ }
+ bp = savebp;
+ address = saveaddress;
+ }
+ }
+ if (endfu) {
+ /*
+ * if eaddress not set, error or file size was multiple of
+ * blocksize, and no partial block ever found.
+ */
+ if (!eaddress) {
+ if (!address)
+ return;
+ eaddress = address;
+ }
+ list_for_each (p, &endfu->prlist) {
+ const char *color = NULL;
+
+ pr = list_entry(p, struct hexdump_pr, prlist);
+ if (colors_wanted() && pr->colorlist
+ && (color = color_cond(pr, bp, pr->bcnt))) {
+ color_enable(color);
+ }
+
+ switch(pr->flags) {
+ case F_ADDRESS:
+ printf(pr->fmt, eaddress);
+ break;
+ case F_TEXT:
+ printf("%s", pr->fmt);
+ break;
+ }
+ if (color) /* did we highlight something? */
+ color_disable();
+ }
+ }
+}
+
+static char **_argv;
+
+static u_char *
+get(struct hexdump *hex)
+{
+ static int ateof = 1;
+ static u_char *curp, *savp;
+ ssize_t n, need, nread;
+ u_char *tmpp;
+
+ if (!curp) {
+ curp = xcalloc(1, hex->blocksize);
+ savp = xcalloc(1, hex->blocksize);
+ } else {
+ tmpp = curp;
+ curp = savp;
+ savp = tmpp;
+ address += hex->blocksize;
+ }
+ need = hex->blocksize, nread = 0;
+ while (TRUE) {
+ /*
+ * if read the right number of bytes, or at EOF for one file,
+ * and no other files are available, zero-pad the rest of the
+ * block and set the end flag.
+ */
+ if (!hex->length || (ateof && !next(NULL, hex))) {
+ if (need == hex->blocksize)
+ goto retnul;
+ if (!need && vflag != ALL &&
+ !memcmp(curp, savp, nread)) {
+ if (vflag != DUP)
+ printf("*\n");
+ goto retnul;
+ }
+ if (need > 0)
+ memset((char *)curp + nread, 0, need);
+ eaddress = address + nread;
+ return(curp);
+ }
+ if (fileno(stdin) == -1) {
+ warnx(_("all input file arguments failed"));
+ goto retnul;
+ }
+ n = fread((char *)curp + nread, sizeof(unsigned char),
+ hex->length == -1 ? need : min(hex->length, need), stdin);
+ if (!n) {
+ if (ferror(stdin))
+ warn("%s", _argv[-1]);
+ ateof = 1;
+ continue;
+ }
+ ateof = 0;
+ if (hex->length != -1)
+ hex->length -= n;
+ if (!(need -= n)) {
+ if (vflag == ALL || vflag == FIRST ||
+ memcmp(curp, savp, hex->blocksize) != 0) {
+ if (vflag == DUP || vflag == FIRST)
+ vflag = WAIT;
+ return(curp);
+ }
+ if (vflag == WAIT)
+ printf("*\n");
+ vflag = DUP;
+ address += hex->blocksize;
+ need = hex->blocksize;
+ nread = 0;
+ }
+ else
+ nread += n;
+ }
+retnul:
+ free (curp);
+ free (savp);
+ return NULL;
+}
+
+int next(char **argv, struct hexdump *hex)
+{
+ static int done;
+ int statok;
+
+ if (argv) {
+ _argv = argv;
+ return(1);
+ }
+ while (TRUE) {
+ if (*_argv) {
+ if (!(freopen(*_argv, "r", stdin))) {
+ warn("%s", *_argv);
+ hex->exitval = EXIT_FAILURE;
+ ++_argv;
+ continue;
+ }
+ statok = done = 1;
+ } else {
+ if (done++)
+ return(0);
+ statok = 0;
+ }
+ if (hex->skip)
+ doskip(statok ? *_argv : "stdin", statok, hex);
+ if (*_argv)
+ ++_argv;
+ if (!hex->skip)
+ return(1);
+ }
+ /* NOTREACHED */
+}
+
+static void
+doskip(const char *fname, int statok, struct hexdump *hex)
+{
+ struct stat sbuf;
+
+ if (statok) {
+ if (fstat(fileno(stdin), &sbuf))
+ err(EXIT_FAILURE, "%s", fname);
+ if (S_ISREG(sbuf.st_mode) && hex->skip > sbuf.st_size) {
+ /* If size valid and skip >= size */
+ hex->skip -= sbuf.st_size;
+ address += sbuf.st_size;
+ return;
+ }
+ }
+ /* sbuf may be undefined here - do not test it */
+ if (fseek(stdin, hex->skip, SEEK_SET))
+ err(EXIT_FAILURE, "%s", fname);
+ address += hex->skip;
+ hex->skip = 0;
+}
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