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/* $Id$
**
** Declarations of routines and variables in the C library. Including this
** file is the equivalent of including all of the following headers,
** portably:
**
** #include <sys/types.h>
** #include <stdarg.h>
** #include <stdio.h>
** #include <stdlib.h>
** #include <stddef.h>
** #include <string.h>
** #include <unistd.h>
**
** Missing functions are provided via #define or prototyped if available from
** the util helper library. Also provides some standard #defines.
**
** Written by Russ Allbery <rra@stanford.edu>
** Copyright 2006, 2007 Board of Trustees, Leland Stanford Jr. University
**
** See LICENSE for licensing terms.
*/
#ifndef SYSTEM_H
#define SYSTEM_H 1
/* Make sure we have our configuration information. */
#include <config.h>
/* A set of standard ANSI C headers. We don't care about pre-ANSI systems. */
#include <stdarg.h>
#include <stddef.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <string.h>
#include <unistd.h>
/* __attribute__ is available in gcc 2.5 and later, but only with gcc 2.7
could you use the __format__ form of the attributes, which is what we use
(to avoid confusion with other macros). */
#ifndef __attribute__
# if __GNUC__ < 2 || (__GNUC__ == 2 && __GNUC_MINOR__ < 7)
# define __attribute__(spec) /* empty */
# endif
#endif
/* BEGIN_DECLS is used at the beginning of declarations so that C++
compilers don't mangle their names. END_DECLS is used at the end. */
#undef BEGIN_DECLS
#undef END_DECLS
#ifdef __cplusplus
# define BEGIN_DECLS extern "C" {
# define END_DECLS }
#else
# define BEGIN_DECLS /* empty */
# define END_DECLS /* empty */
#endif
BEGIN_DECLS
/* Provide prototypes for functions not declared in system headers. Use the
HAVE_DECL macros for those functions that may be prototyped but
implemented incorrectly or implemented without a prototype. */
#if !HAVE_ASPRINTF
extern int asprintf(char **, const char *, ...);
extern int vasprintf(char **, const char *, va_list);
#endif
#if !HAVE_DECL_SNPRINTF
extern int snprintf(char *, size_t, const char *, ...)
__attribute__((__format__(printf, 3, 4)));
#endif
#if !HAVE_DECL_VSNPRINTF
extern int vsnprintf(char *, size_t, const char *, va_list);
#endif
END_DECLS
/* C99 requires va_copy. Older versions of GCC provide __va_copy. Per the
Autoconf manual, memcpy is a generally portable fallback. */
#ifndef va_copy
# ifdef __va_copy
# define va_copy(d, s) __va_copy((d), (s))
# else
# define va_copy(d, s) memcpy(&(d), &(s), sizeof(va_list))
# endif
#endif
#endif /* !SYSTEM_H */
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