From a4a8bf63295f8de7978be602688532ebd5d8743f Mon Sep 17 00:00:00 2001
From: Stefan Reinauer <reinauer@chromium.org>
Date: Mon, 29 Jul 2013 16:23:06 -0700
Subject: [PATCH] libpayload: Add simple hexdump function

 - prints hex and ascii
 - detects duplicate all zero lines

BUG=none
TEST=none
BRANCH=none

Change-Id: I084b3072bc05725b23c5c3ca0dbf1533f164a08c
Signed-off-by: Stefan Reinauer <reinauer@google.com>
Reviewed-on: https://gerrit.chromium.org/gerrit/63660
Reviewed-by: David Hendricks <dhendrix@chromium.org>
Commit-Queue: Stefan Reinauer <reinauer@chromium.org>
---
 payloads/libpayload/include/libpayload.h |  1 +
 payloads/libpayload/libc/hexdump.c       | 58 ++++++++++++++++++++++++
 2 files changed, 59 insertions(+)
 create mode 100644 payloads/libpayload/libc/hexdump.c

diff --git a/payloads/libpayload/include/libpayload.h b/payloads/libpayload/include/libpayload.h
index f23fb8763b..33af971c32 100644
--- a/payloads/libpayload/include/libpayload.h
+++ b/payloads/libpayload/include/libpayload.h
@@ -293,6 +293,7 @@ long int labs(long int j);
 long long int llabs(long long int j);
 u8 bin2hex(u8 b);
 u8 hex2bin(u8 h);
+void hexdump(unsigned long memory, int length);
 void fatal(const char *msg) __attribute__ ((noreturn));
 /** @} */
 
diff --git a/payloads/libpayload/libc/hexdump.c b/payloads/libpayload/libc/hexdump.c
new file mode 100644
index 0000000000..9fbb7ef4d3
--- /dev/null
+++ b/payloads/libpayload/libc/hexdump.c
@@ -0,0 +1,58 @@
+/*
+ * 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 <libpayload.h>
+
+void hexdump(unsigned long memory, int length)
+{
+        int i;
+        uint8_t *m;
+        int all_zero = 0;
+
+        m = (uint8_t *)memory;
+
+        for (i = 0; i < length; i += 16) {
+                int j;
+
+                all_zero++;
+                for (j = 0; j < 16; j++) {
+                        if(m[i+j] != 0) {
+                                all_zero = 0;
+                                break;
+                        }
+                }
+
+                if (all_zero < 2) {
+                        printf("%08lx:", memory + i);
+                        for (j = 0; j < 16; j++)
+                                printf(" %02x", m[i+j]);
+                        printf("  ");
+                        for (j = 0; j < 16; j++)
+                                printf("%c", isprint(m[i+j]) ? m[i+j] : '.');
+                        printf("\n");
+                } else if (all_zero == 2) {
+                        printf("...\n");
+                }
+        }
+}
+
+