--- a/th_string.h	Tue Feb 16 19:05:00 2016 +0200
+++ b/th_string.h	Tue Feb 16 20:32:02 2016 +0200
@@ -48,6 +48,14 @@
 };
 
 
+typedef struct
+{
+    char *buf;
+    size_t size, pos;
+    void *data;
+} th_printf_ctx;
+
+
 /* Normal NUL-terminated string functions
  */
 char    *th_strdup(const char *src);
@@ -60,7 +68,7 @@
 char    *th_strrcasecmp(char *haystack, const char *needle);
 void    th_strip_ctrlchars(char *str);
 
-int     th_vprintf_do(void *ctx, int (*vputch)(void *ctx, const char ch), const char *fmt, va_list ap);
+int     th_vprintf_do(th_printf_ctx *ctx, int (*vputch)(th_printf_ctx *ctx, const char ch), const char *fmt, va_list ap, const BOOL eol);
 int     th_vsnprintf(char *buf, size_t size, const char *fmt, va_list ap);
 int     th_snprintf(char *buf, size_t size, const char *fmt, ...);
 int     th_vfprintf(FILE *fh, const char *fmt, va_list ap);