Copy hexdump over to parlib
authorRonald G. Minnich <rminnich@google.com>
Wed, 19 Mar 2014 02:27:30 +0000 (19:27 -0700)
committerRonald G. Minnich <rminnich@google.com>
Wed, 19 Mar 2014 02:27:30 +0000 (19:27 -0700)
It's very handy at times.

Signed-off-by: Ronald G. Minnich <rminnich@google.com>
user/parlib/hexdump.c [new file with mode: 0644]

diff --git a/user/parlib/hexdump.c b/user/parlib/hexdump.c
new file mode 100644 (file)
index 0000000..3c45fad
--- /dev/null
@@ -0,0 +1,64 @@
+/*
+ * Copyright 2013 Google Inc.
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but without any warranty; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <unistd.h>
+
+static int isprint(int c)
+{
+       return (c >= 32 && c <= 126);
+}
+
+void hexdump(FILE *f, void *v, int length)
+{
+       int i;
+       unsigned char *m = v;
+       unsigned long memory = (unsigned long) v;
+       int all_zero = 0;
+
+       for (i = 0; i < length; i += 16) {
+               int j;
+
+               all_zero++;
+               for (j = 0; (j < 16) && (i + j < length); j++) {
+                       if (m[i + j] != 0) {
+                               all_zero = 0;
+                               break;
+                       }
+               }
+
+               if (all_zero < 2) {
+                       fprintf(f,"%08lx:", memory + i);
+                       for (j = 0; j < 16; j++)
+                               fprintf(f," %02x", m[i + j]);
+                       fprintf(f,"  ");
+                       for (j = 0; j < 16; j++)
+                               fprintf(f,"%c", isprint(m[i + j]) ? m[i + j] : '.');
+                       fprintf(f,"\n");
+               } else if (all_zero == 2) {
+                       fprintf(f,"...\n");
+               }
+       }
+}
+