cbfstool: Add bintohex function
We need to emit some hex strings.
Change-Id: I9e7e184282f6ad0470f2e269f5dc874e78f8b697
Signed-off-by: Patrick Georgi <patrick@georgi-clan.de>
Reviewed-on: http://review.coreboot.org/11766
Tested-by: build bot (Jenkins)
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
diff --git a/util/cbfstool/common.c b/util/cbfstool/common.c
index e0474b3..7e36b7f 100644
--- a/util/cbfstool/common.c
+++ b/util/cbfstool/common.c
@@ -196,3 +196,20 @@
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 @@
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