qmi-firmware-update: setup str_hex() as common utils

1 files changed, 40 insertions, 0 deletions

diff --git a/src/qmi-firmware-update/qfu-utils.c b/src/qmi-firmware-update/qfu-utils.c
index 86677c7..4cf9d89 100644
--- a/src/qmi-firmware-update/qfu-utils.c
+++ b/src/qmi-firmware-update/qfu-utils.c
@@ -23,10 +23,50 @@
  * Copyright (C) 2010 Red Hat, Inc.
  */
 
+#include <stdio.h>
+
 #include <glib.h>
 
 #include "qfu-utils.h"
 
+/******************************************************************************/
+
+gchar *
+qfu_utils_str_hex (gconstpointer mem,
+                   gsize         size,
+                   gchar         delimiter)
+{
+    const guint8 *data = mem;
+    gsize         i;
+    gsize         j;
+    gsize         new_str_length;
+    gchar        *new_str;
+
+    /* Get new string length. If input string has N bytes, we need:
+     * - 1 byte for last NUL char
+     * - 2N bytes for hexadecimal char representation of each byte...
+     * - N-1 bytes for the separator ':'
+     * So... a total of (1+2N+N-1) = 3N bytes are needed... */
+    new_str_length =  3 * size;
+
+    /* Allocate memory for new array and initialize contents to NUL */
+    new_str = g_malloc0 (new_str_length);
+
+    /* Print hexadecimal representation of each byte... */
+    for (i = 0, j = 0; i < size; i++, j += 3) {
+        /* Print character in output string... */
+        snprintf (&new_str[j], 3, "%02X", data[i]);
+        /* And if needed, add separator */
+        if (i != (size - 1) )
+            new_str[j + 2] = delimiter;
+    }
+
+    /* Set output string */
+    return new_str;
+}
+
+/******************************************************************************/
+
 /* Table of CRCs for each possible byte, with a generator polynomial of 0x8408 */
 static const guint16 crc_table[256] = {
     0x0000, 0x1189, 0x2312, 0x329b, 0x4624, 0x57ad, 0x6536, 0x74bf,