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Editing: sprintf.h

#ifndef RBIMPL_INTERN_SPRINTF_H                      /*-*-C++-*-vi:se ft=cpp:*/
#define RBIMPL_INTERN_SPRINTF_H
/**
 * @file
 * @author     Ruby developers <ruby-core@ruby-lang.org>
 * @copyright  This  file  is   a  part  of  the   programming  language  Ruby.
 *             Permission  is hereby  granted,  to  either redistribute  and/or
 *             modify this file, provided that  the conditions mentioned in the
 *             file COPYING are met.  Consult the file for details.
 * @warning    Symbols   prefixed  with   either  `RBIMPL`   or  `rbimpl`   are
 *             implementation details.   Don't take  them as canon.  They could
 *             rapidly appear then vanish.  The name (path) of this header file
 *             is also an  implementation detail.  Do not expect  it to persist
 *             at the place it is now.  Developers are free to move it anywhere
 *             anytime at will.
 * @note       To  ruby-core:  remember  that   this  header  can  be  possibly
 *             recursively included  from extension  libraries written  in C++.
 *             Do not  expect for  instance `__VA_ARGS__` is  always available.
 *             We assume C99  for ruby itself but we don't  assume languages of
 *             extension libraries. They could be written in C++98.
 * @brief      Our own private printf(3).
 */
#include "ruby/internal/attr/format.h"
#include "ruby/internal/dllexport.h"
#include "ruby/internal/value.h"

RBIMPL_SYMBOL_EXPORT_BEGIN()

/* sprintf.c */
VALUE rb_f_sprintf(int, const VALUE*);

RBIMPL_ATTR_FORMAT(RBIMPL_PRINTF_FORMAT, 1, 2)
VALUE rb_sprintf(const char*, ...);
VALUE rb_vsprintf(const char*, va_list);

RBIMPL_ATTR_FORMAT(RBIMPL_PRINTF_FORMAT, 2, 3)
VALUE rb_str_catf(VALUE, const char*, ...);
VALUE rb_str_vcatf(VALUE, const char*, va_list);
VALUE rb_str_format(int, const VALUE *, VALUE);

RBIMPL_SYMBOL_EXPORT_END()

#endif /* RBIMPL_INTERN_SPRINTF_H */

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