hexdump: remove the trailing space
For example:
hex_dump_to_buffer("AB", 2, 16, 1, buf, 100, 0);
pr_info("[%s]\n", buf);
I'd expect the output to be "[41 42]", but actually it's "[41 42 ]"
This patch also makes the required buf to be minimum. To print the hex
format of "AB", a buf with size 6 should be sufficient, but
hex_dump_to_buffer() required at least 8.
Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>
Acked-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/lib/hexdump.c b/lib/hexdump.c
index f07c0db..39af256 100644
--- a/lib/hexdump.c
+++ b/lib/hexdump.c
@@ -65,7 +65,8 @@
for (j = 0; j < ngroups; j++)
lx += scnprintf(linebuf + lx, linebuflen - lx,
- "%16.16llx ", (unsigned long long)*(ptr8 + j));
+ "%s%16.16llx", j ? " " : "",
+ (unsigned long long)*(ptr8 + j));
ascii_column = 17 * ngroups + 2;
break;
}
@@ -76,7 +77,7 @@
for (j = 0; j < ngroups; j++)
lx += scnprintf(linebuf + lx, linebuflen - lx,
- "%8.8x ", *(ptr4 + j));
+ "%s%8.8x", j ? " " : "", *(ptr4 + j));
ascii_column = 9 * ngroups + 2;
break;
}
@@ -87,19 +88,21 @@
for (j = 0; j < ngroups; j++)
lx += scnprintf(linebuf + lx, linebuflen - lx,
- "%4.4x ", *(ptr2 + j));
+ "%s%4.4x", j ? " " : "", *(ptr2 + j));
ascii_column = 5 * ngroups + 2;
break;
}
default:
- for (j = 0; (j < rowsize) && (j < len) && (lx + 4) < linebuflen;
- j++) {
+ for (j = 0; (j < len) && (lx + 3) <= linebuflen; j++) {
ch = ptr[j];
linebuf[lx++] = hex_asc_hi(ch);
linebuf[lx++] = hex_asc_lo(ch);
linebuf[lx++] = ' ';
}
+ if (j)
+ lx--;
+
ascii_column = 3 * rowsize + 2;
break;
}
@@ -108,7 +111,7 @@
while (lx < (linebuflen - 1) && lx < (ascii_column - 1))
linebuf[lx++] = ' ';
- for (j = 0; (j < rowsize) && (j < len) && (lx + 2) < linebuflen; j++)
+ for (j = 0; (j < len) && (lx + 2) < linebuflen; j++)
linebuf[lx++] = (isascii(ptr[j]) && isprint(ptr[j])) ? ptr[j]
: '.';
nil: