helper: hexify correctly handle signed chars

[openocd] / src / helper / binarybuffer.c

diff --git a/src/helper/binarybuffer.c b/src/helper/binarybuffer.c
index a90ec7b01ebab7dc3b928104df4badb77d38e59a..b3e44916aa4d44de39f39750226d2bb9c5bb4462 100644 (file)
--- a/src/helper/binarybuffer.c
+++ b/src/helper/binarybuffer.c
@@ -393,7 +393,7 @@ int hexify(char *hex, const char *bin, int count, int out_maxlen)
                count = strlen(bin);
 
        for (i = 0; i < count; i++)
-               cmd_len += snprintf(hex + cmd_len, out_maxlen - cmd_len, "%02x", bin[i]);
+               cmd_len += snprintf(hex + cmd_len, out_maxlen - cmd_len, "%02x", bin[i] & 0xff);
 
        return cmd_len;
 }