+/**
+ * @ingroup StrBuf_DeEnCoder
+ * @brief append a string in hex encoding to the buffer
+ * @param OutBuf the output buffer
+ * @param In Buffer to encode
+ * @param PlainIn way in from plain old c strings
+ */
+void StrBufHexescAppend(StrBuf *OutBuf, const StrBuf *In, const char *PlainIn)
+{
+ const char *pch, *pche;
+ char *pt, *pte;
+ int len;
+
+ if (((In == NULL) && (PlainIn == NULL)) || (OutBuf == NULL) )
+ return;
+ if (PlainIn != NULL) {
+ len = strlen(PlainIn);
+ pch = PlainIn;
+ pche = pch + len;
+ }
+ else {
+ pch = In->buf;
+ pche = pch + In->BufUsed;
+ len = In->BufUsed;
+ }
+
+ if (len == 0)
+ return;
+
+ pt = OutBuf->buf + OutBuf->BufUsed;
+ pte = OutBuf->buf + OutBuf->BufSize - 3; /**< we max append 3 chars at once plus the \0 */
+
+ while (pch < pche) {
+ if (pt >= pte) {
+ IncreaseBuf(OutBuf, 1, -1);
+ pte = OutBuf->buf + OutBuf->BufSize - 3; /**< we max append 3 chars at once plus the \0 */
+ pt = OutBuf->buf + OutBuf->BufUsed;
+ }
+
+ *pt = HexList[(unsigned char)*pch][0];
+ pt ++;
+ *pt = HexList[(unsigned char)*pch][1];
+ pt ++; pch ++; OutBuf->BufUsed += 2;
+ }
+ *pt = '\0';
+}
+