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Re: [Qemu-devel] [PATCH] util: Improved qemu_hexmap() to include an asci
From: |
Thomas Huth |
Subject: |
Re: [Qemu-devel] [PATCH] util: Improved qemu_hexmap() to include an ascii dump of the buffer |
Date: |
Wed, 23 Mar 2016 09:11:58 +0100 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.6.0 |
Hi Isaac,
thanks for taking care of this!
Comments below...
On 22.03.2016 08:41, Isaac Lozano wrote:
> qemu_hexdump() in util/hexdump.c has been changed to give also include a
> ascii dump of the buffer. Also, calls to hex_dump() in net/net.c have
> been replaced with calls to qemu_hexdump(). This takes care of two misc
> BiteSized Tasks.
>
> Signed-off-by: Isaac Lozano <address@hidden>
> ---
> net/net.c | 31 +------------------------------
> util/hexdump.c | 35 ++++++++++++++++++++++++-----------
> 2 files changed, 25 insertions(+), 41 deletions(-)
>
> diff --git a/net/net.c b/net/net.c
> index 1a78edf..8d51ffb 100644
> --- a/net/net.c
> +++ b/net/net.c
> @@ -79,34 +79,6 @@ int default_net = 1;
> /***********************************************************/
> /* network device redirectors */
>
> -#if defined(DEBUG_NET)
> -static void hex_dump(FILE *f, const uint8_t *buf, int size)
> -{
> - int len, i, j, c;
> -
> - for(i=0;i<size;i+=16) {
> - len = size - i;
> - if (len > 16)
> - len = 16;
> - fprintf(f, "%08x ", i);
> - for(j=0;j<16;j++) {
> - if (j < len)
> - fprintf(f, " %02x", buf[i+j]);
> - else
> - fprintf(f, " ");
> - }
> - fprintf(f, " ");
> - for(j=0;j<len;j++) {
> - c = buf[i+j];
> - if (c < ' ' || c > '~')
> - c = '.';
> - fprintf(f, "%c", c);
> - }
> - fprintf(f, "\n");
> - }
> -}
> -#endif
> -
> static int get_str_sep(char *buf, int buf_size, const char **pp, int sep)
> {
> const char *p, *p1;
> @@ -661,8 +633,7 @@ static ssize_t
> qemu_send_packet_async_with_flags(NetClientState *sender,
> int ret;
>
> #ifdef DEBUG_NET
> - printf("qemu_send_packet_async:\n");
> - hex_dump(stdout, buf, size);
> + qemu_hexdump((const char*)buf, stdout, "qemu_send_packet_async", size);
Since the third parameter of qemu_hexdump() is used as a prefix for
each line, I'd maybe use a shorter string here instead, like "net",
and keep the printf("qemu_send_packet_async:\n") in front of it.
> #endif
>
> if (sender->link_down || !sender->peer) {
> diff --git a/util/hexdump.c b/util/hexdump.c
> index 1d9c129..886e53c 100644
> --- a/util/hexdump.c
> +++ b/util/hexdump.c
> @@ -18,21 +18,34 @@
>
> void qemu_hexdump(const char *buf, FILE *fp, const char *prefix, size_t size)
> {
> - unsigned int b;
> + unsigned int b, len, i, c;
>
> - for (b = 0; b < size; b++) {
> - if ((b % 16) == 0) {
> - fprintf(fp, "%s: %04x:", prefix, b);
> + for (b = 0; b < size; b += 16) {
> + len = size - b;
> + if (len > 16) {
> + len = 16;
> }
> - if ((b % 4) == 0) {
> - fprintf(fp, " ");
> + fprintf(fp, "%s: %04x:", prefix, b);
> + for (i = 0; i < 16; i++) {
> + if ((i % 4) == 0) {
> + fprintf(fp, " ");
> + }
> + if (i < len) {
> + fprintf(fp, " %02x", (unsigned char)buf[b + i]);
> + }
> + else
> + {
> + fprintf(fp, " ");
> + }
> }
> - fprintf(fp, " %02x", (unsigned char)buf[b]);
> - if ((b % 16) == 15) {
> - fprintf(fp, "\n");
> + fprintf(fp, " ");
> + for (i = 0; i < len; i++) {
> + c = buf[b+i];
> + if (c < ' ' || c > '~') {
> + c = '.';
> + }
> + fprintf(fp, "%c", c);
> }
> - }
> - if ((b % 16) != 0) {
> fprintf(fp, "\n");
> }
> }
>
The code looks basically fine to me, but scripts/checkpatch.pl
complains about some style issues:
ERROR: "(foo*)" should be "(foo *)"
#59: FILE: net/net.c:636:
+ qemu_hexdump((const char*)buf, stdout, "qemu_send_packet_async", size);
ERROR: that open brace { should be on the previous line
#92: FILE: util/hexdump.c:36:
+ else
+ {
ERROR: else should follow close brace '}'
#92: FILE: util/hexdump.c:36:
+ }
+ else
ERROR: spaces required around that '+' (ctx:VxV)
#102: FILE: util/hexdump.c:43:
+ c = buf[b+i];
^
Thomas