Factor out the core of vprintf() into separate function

vprintf_internal, so that:
* vprintf() does locking and __STDIO_STREAM_TRANS_TO_WRITE thing,
  then calls vprintf_internal
* vsnprintf, vdprintf.c, vasprintf.c use
  vprintf_internal directly

This makes sprintf faster (since it doesn't do any locking)
and stops it from pulling in fseek in static compile.

1 files changed, 13 insertions, 0 deletions

diff --git a/libc/stdio/_stdio.h b/libc/stdio/_stdio.h
index 74b891a03..e1fc26785 100644
--- a/libc/stdio/_stdio.h
+++ b/libc/stdio/_stdio.h
@@ -15,6 +15,7 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
+#include <stdarg.h>
 #include <unistd.h>
 #ifdef __UCLIBC_HAS_WCHAR__
 #include <wchar.h>
@@ -431,6 +432,18 @@ extern size_t _wstdio_fwrite(const wchar_t *__restrict ws,
 #endif
 
 /**********************************************************************/
+
+extern int _vfprintf_internal (FILE * __restrict stream,
+			register const char * __restrict format,
+			va_list arg) attribute_hidden;
+
+#ifdef __UCLIBC_HAS_WCHAR__
+extern int _vfwprintf_internal (FILE * __restrict stream,
+			register const wchar_t * __restrict format,
+			va_list arg) attribute_hidden;
+#endif
+
+/**********************************************************************/
 /* Only use the macro below if you know fp is a valid FILE for a valid fd.
  * This is _not_ true for custom streams! */
 #define __FILENO_UNLOCKED(fp)	((fp)->__filedes)