[Qemu-devel] [PATCH] util: Improved qemu_hexmap() to include an ascii dump of the buffer

[Isaac Lozano <109lozanoi@gmail.com>]

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 <109lozanoi@gmail.com>
---
 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);
 #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");
     }
 }
-- 
2.7.2