New patch to review for coreboot: cbfstool: Add hextobin function

[Patrick Georgi]

Patrick Georgi ([e-mail]) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/11766

-gerrit

commit 42b2e3d1f9a1a5acc703045fe9c785f7a4fb7906
Author: Patrick Georgi 
Date:   Thu Oct 1 15:52:56 2015 +0200

cbfstool: Add hextobin function

We need to emit some hex strings.

Change-Id: I9e7e184282f6ad0470f2e269f5dc874e78f8b697
    Signed-off-by: Patrick Georgi 
---
 util/cbfstool/common.c | 17 +++++++++++++++++
 util/cbfstool/common.h |  7 +++++++
 2 files changed, 24 insertions(+)

diff --git a/util/cbfstool/common.c b/util/cbfstool/common.c
index e0474b3..ac28abd 100644
--- a/util/cbfstool/common.c
+++ b/util/cbfstool/common.c
@@ -196,3 +196,20 @@ uint64_t intfiletype(const char *name)
    		return filetypes[i].type;
    return -1;
 }
+
+char *bintohex(uint8_t *data, size_t len)
+{
+	static const char translate[16] = "0123456789abcdef";
+
+	char *result = malloc(len * 2 + 1);
+	if (result == NULL)
+		return NULL;
+
+	result[len*2] = 0;
+	unsigned int i;
+	for (i = 0; i < len; i++) {
+		result[i*2] = translate[(data[i] >> 4) & 0xf];
+		result[i*2+1] = translate[data[i] & 0xf];
+	}
+	return result;
+}
diff --git a/util/cbfstool/common.h b/util/cbfstool/common.h
index 8073d12..86ae484 100644
--- a/util/cbfstool/common.h
+++ b/util/cbfstool/common.h
@@ -210,4 +210,11 @@ extern struct xdr xdr_le, xdr_be;
 size_t bgets(struct buffer *input, void *output, size_t len);
 size_t bputs(struct buffer *b, const void *data, size_t len);

+/* Returns a 0-terminated string containing a hex representation of
+ * len bytes starting at data.
+ * The string is malloc'd and it's the caller's responsibility to free
+ * the memory.
+ * On error, bintohex returns NULL.
+ */
+char *bintohex(uint8_t *data, size_t len);
 #endif