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util/hexdump: Add unit_len and block_len to qemu_hexdump_line

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Generalize the current 1 byte unit and 4 byte blocking
within the output.

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-Id: <20240412073346.458116-5-richard.henderson@linaro.org>
This commit is contained in:
Richard Henderson 2024-04-12 00:33:23 -07:00
parent 53ee5f551e
commit c49d1c37d8
3 changed files with 27 additions and 11 deletions
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30
util/hexdump.c
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@ -1,5 +1,5 @@
/*
* Helper to hexdump a buffer
* Helper to hexdump a buffer
*
* Copyright (c) 2013 Red Hat, Inc.
* Copyright (c) 2013 Gerd Hoffmann <kraxel@redhat.com>
@ -16,22 +16,34 @@
#include "qemu/osdep.h"
#include "qemu/cutils.h"
GString *qemu_hexdump_line(GString *str, const void *vbuf, size_t len)
GString *qemu_hexdump_line(GString *str, const void *vbuf, size_t len,
size_t unit_len, size_t block_len)
{
const uint8_t *buf = vbuf;
size_t i;
size_t u, b;
if (str == NULL) {
/* Estimate the length of the output to avoid reallocs. */
i = len * 3 + len / 4;
str = g_string_sized_new(i + 1);
size_t est = len * 2;
if (unit_len) {
est += len / unit_len;
}
if (block_len) {
est += len / block_len;
}
str = g_string_sized_new(est + 1);
}
for (i = 0; i < len; i++) {
if (i != 0 && (i % 4) == 0) {
for (u = 0, b = 0; len; u++, b++, len--, buf++) {
if (unit_len && u == unit_len) {
g_string_append_c(str, ' ');
u = 0;
}
g_string_append_printf(str, " %02x", buf[i]);
if (block_len && b == block_len) {
g_string_append_c(str, ' ');
b = 0;
}
g_string_append_printf(str, "%02x", *buf);
}
return str;
@ -67,7 +79,7 @@ void qemu_hexdump(FILE *fp, const char *prefix,
len = MIN(size - b, QEMU_HEXDUMP_LINE_BYTES);
g_string_truncate(str, 0);
qemu_hexdump_line(str, bufptr + b, len);
qemu_hexdump_line(str, bufptr + b, len, 1, 4);
asciidump_line(ascii, bufptr + b, len);
fprintf(fp, "%s: %04zx: %-*s %s\n",