--- a/th_datastruct.c	Wed Feb 17 14:22:33 2016 +0200
+++ b/th_datastruct.c	Wed Feb 17 14:27:47 2016 +0200
@@ -538,3 +538,53 @@
 
     return TRUE;
 }
+
+
+/*
+ * Simple legacy string growing buffer
+ */
+BOOL th_strbuf_grow(char **buf, size_t *bufsize, size_t *len, size_t grow)
+{
+    if (*buf == NULL)
+        *bufsize = *len = 0;
+
+    if (*buf == NULL || *len + grow >= *bufsize)
+    {
+        *bufsize += grow + TH_BUFGROW;
+        *buf = th_realloc(*buf, *bufsize);
+        if (*buf == NULL)
+            return FALSE;
+    }
+    return TRUE;
+}
+
+
+BOOL th_strbuf_putch(char **buf, size_t *bufsize, size_t *len, const char ch)
+{
+    if (!th_strbuf_grow(buf, bufsize, len, 1))
+        return FALSE;
+
+    (*buf)[*len] = ch;
+    (*len)++;
+
+    return TRUE;
+}
+
+
+BOOL th_strbuf_puts(char **buf, size_t *bufsize, size_t *len, const char *str)
+{
+    size_t slen;
+    if (str == NULL)
+        return FALSE;
+
+    slen = strlen(str);
+    if (!th_strbuf_grow(buf, bufsize, len, slen + 1))
+        return FALSE;
+
+    memcpy(*buf + *len, str, slen + 1);
+    (*len) += slen;
+
+    return TRUE;
+}
+
+