--- a/th_string.h	Wed Oct 25 22:13:09 2017 +0300
+++ b/th_string.h	Wed Oct 25 22:20:21 2017 +0300
@@ -100,7 +100,6 @@
 char    *th_strrcasecmp(char *haystack, const char *needle);
 void    th_strip_ctrlchars(char *str);
 
-int     th_vprintf_do(th_vprintf_ctx *ctx, th_vprintf_putch vputch, const char *fmt, va_list ap);
 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);
@@ -117,6 +116,35 @@
 int     th_pstr_cat(char **pdst, const char *src);
 
 
+/* Internal printf() implementation. NOTICE! This API may be unstable.
+ */
+int     th_vprintf_do(th_vprintf_ctx *ctx, th_vprintf_putch vputch, const char *fmt, va_list ap);
+int     th_vprintf_put_str(th_vprintf_ctx *ctx, th_vprintf_putch vputch,
+        const char *str, int f_flags, const int f_width, const int f_prec);
+int 	th_vprintf_put_int(th_vprintf_ctx *ctx, th_vprintf_putch vputch,
+        va_list ap, const int f_radix, int f_flags, int f_width, int f_prec,
+        const BOOL f_unsig, char *(f_alt)(const char *buf, const size_t blen, const int vret, const int flags));
+int	 th_vprintf_put_int_format(th_vprintf_ctx *ctx, th_vprintf_putch vputch,
+        char *buf, int f_flags, int f_width, int f_prec, int f_len, int vret,
+        BOOL f_neg, BOOL f_unsig, char *(f_alt)(const char *buf, const size_t blen, const int vret, const int flags));
+
+char *  th_printf_altfmt_oct(const char *buf, const size_t len, const int vret, const int flags);
+char *  th_printf_altfmt_hex(const char *buf, const size_t len, const int vret, const int flags);
+
+#define TH_PFUNC_NAME th_vprintf_buf_int
+#define TH_PFUNC_TYPE_S int
+#define TH_PFUNC_TYPE_U unsigned int
+#define TH_PFUNC_HEADER 1
+#include "th_printf1.c"
+
+
+#define TH_PFUNC_NAME th_vprintf_buf_int64
+#define TH_PFUNC_TYPE_S int64_t
+#define TH_PFUNC_TYPE_U uint64_t
+#define TH_PFUNC_HEADER 1
+#include "th_printf1.c"
+
+
 /* Parsing, matching
  */
 const char    *th_findnext(const char *, size_t *);