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PR: bin/9016

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Fix bug with od/hd/hexdump. "*" lines are supposed to indicate one or
    duplicates of the previous line, but a small file with less then 16
    characters of zeros in it will be falsy identified as a repeat of
    the (non-existant) previous line.  i.e. the first line of output winds
    up being a "*".  Added a bit of code to handle the degenerate 'there is
    no previous line' case for the first line.
This commit is contained in:
Matthew Dillon 1998-12-13 06:40:18 +00:00
parent 4ef875d707
commit b001517f54
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=41724
1 changed files with 8 additions and 3 deletions
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11
usr.bin/hexdump/display.c
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@ -36,7 +36,7 @@
static char sccsid[] = "@(#)display.c 8.1 (Berkeley) 6/6/93";
#endif
static const char rcsid[] =
"$Id$";
"$Id: display.c,v 1.2 1997/07/10 06:48:12 charnier Exp $";
#endif /* not lint */
#include <sys/param.h>
@ -234,6 +234,7 @@ get()
static u_char *curp, *savp;
register int n;
int need, nread;
int valid_save = 0;
u_char *tmpp;
if (!curp) {
@ -244,6 +245,7 @@ get()
curp = savp;
savp = tmpp;
address += blocksize;
valid_save = 1;
}
for (need = blocksize, nread = 0;;) {
/*
@ -254,7 +256,9 @@ get()
if (!length || ateof && !next((char **)NULL)) {
if (need == blocksize)
return((u_char *)NULL);
if (vflag != ALL && !bcmp(curp, savp, nread)) {
if (vflag != ALL &&
valid_save &&
bcmp(curp, savp, nread) == 0) {
if (vflag != DUP)
(void)printf("*\n");
return((u_char *)NULL);
@ -276,7 +280,8 @@ get()
length -= n;
if (!(need -= n)) {
if (vflag == ALL || vflag == FIRST ||
bcmp(curp, savp, blocksize)) {
valid_save == 0 ||
bcmp(curp, savp, blocksize) != 0) {
if (vflag == DUP || vflag == FIRST)
vflag = WAIT;
return(curp);