From 6a7ba4d620a1915b74a9a7ac26b07f7f621a5db6 Mon Sep 17 00:00:00 2001
From: Niklas Dusenlund <niklas@dusenlund.se>
Date: Fri, 9 Feb 2024 12:58:08 +0100
Subject: [PATCH] Add a function to help debugging

---
 src/util.c | 10 ++++++++++
 src/util.h |  4 ++++
 2 files changed, 14 insertions(+)

diff --git a/src/util.c b/src/util.c
index 4318214f0..8df53f74f 100644
--- a/src/util.c
+++ b/src/util.c
@@ -39,6 +39,16 @@ void util_uint8_to_hex(const uint8_t* in_bin, const size_t in_len, char* out)
         rust_util_bytes(in_bin, in_len), rust_util_bytes_mut((uint8_t*)out, in_len * 2 + 1));
 }
 
+#if defined(SEMIHOSTING)
+char* util_uint8_to_hex_alloc(const uint8_t* in_bin, const size_t in_len)
+{
+    void* out = malloc(in_len * 2 + 1);
+    rust_util_uint8_to_hex(
+        rust_util_bytes(in_bin, in_len), rust_util_bytes_mut((uint8_t*)out, in_len * 2 + 1));
+    return (char*)out;
+}
+#endif
+
 void util_cleanup_str(char** str)
 {
     util_zero(*str, strlens(*str));
diff --git a/src/util.h b/src/util.h
index e84ec1c2d..fa5cf3890 100644
--- a/src/util.h
+++ b/src/util.h
@@ -61,6 +61,10 @@ void util_zero(volatile void* dst, size_t len);
 // `out` must be of size in_len*2+1. Use BB_HEX_SIZE() to compute the size.
 void util_uint8_to_hex(const uint8_t* in_bin, size_t in_len, char* out);
 
+// This function is only compiled when we compile with SEMIHOSTING, it is convenient when debugging
+// to print byte arrays as hex.
+char* util_uint8_to_hex_alloc(const uint8_t* in_bin, size_t in_len);
+
 #define BB_HEX_SIZE(in_bin) (sizeof((in_bin)) * 2 + 1)
 
 void util_cleanup_str(char** str);