helper: hexify correctly handle signed chars

[openocd.git] / src / helper / binarybuffer.c

diff --git a/src/helper/binarybuffer.c b/src/helper/binarybuffer.c
index d98fa16212f04138f5c751d507112ed05c2f64fc..b3e44916aa4d44de39f39750226d2bb9c5bb4462 100644 (file)
--- a/src/helper/binarybuffer.c
+++ b/src/helper/binarybuffer.c
@@ -370,3 +370,30 @@ void bit_copy_discard(struct bit_copy_queue *q)
                free(qe);
        }
 }
+
+int unhexify(char *bin, const char *hex, int count)
+{
+       int i, tmp;
+
+       for (i = 0; i < count; i++) {
+               if (sscanf(hex + (2 * i), "%02x", &tmp) != 1)
+                       return i;
+               bin[i] = tmp;
+       }
+
+       return i;
+}
+
+int hexify(char *hex, const char *bin, int count, int out_maxlen)
+{
+       int i, cmd_len = 0;
+
+       /* May use a length, or a null-terminated string as input. */
+       if (count == 0)
+               count = strlen(bin);
+
+       for (i = 0; i < count; i++)
+               cmd_len += snprintf(hex + cmd_len, out_maxlen - cmd_len, "%02x", bin[i] & 0xff);
+
+       return cmd_len;
+}