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/*
* zioP.h Internal header for libzio, including required
* standard glibc header, zlib.h, and bzlib.h.
* Making the used libz and bzlib functions weak symbols.
*
* Copyright 2004 Werner Fink, 2004 SuSE LINUX AG, Germany.
* Copyright 2006 Werner Fink, 2006 SuSE Products GmbH, Germany.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* Author: Werner Fink <werner@suse.de>
*/
#ifndef _ZIO_P_H
#define _ZIO_P_H
#ifndef _GNU_SOURCE
# define _GNU_SOURCE
#endif
#include <stdio.h>
#include <string.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <fcntl.h>
#ifdef HAVE_LIBIO_H
# include <libio.h>
#endif
#include <unistd.h>
#include <stdlib.h>
#include <errno.h>
#ifndef unused
# define unused __attribute__((__unused__))
#endif
#ifndef nonnull
# define nonnull(parm) __attribute__((__nonnull__ parm))
#endif
#ifndef wur
# define wur __attribute__((__warn_unused_result__))
#endif
#define alignof(type) (sizeof(type)+(sizeof(type)%sizeof(void*)))
#define strsize(str) ((strlen(str)+1)*sizeof(char))
#if !defined(HAVE_FOPENCOOKIE) && !defined(HAVE_FUNOPEN)
# error Requires fopencookie(3GNU) or funopen(3BSD)
#endif
#if defined(HAVE_LIBIO_H) || defined(HAVE_FOPENCOOKIE)
# if defined __GLIBC__ && __GLIBC__ > 1
# undef LIBIO_IS_FIXED
# if __GLIBC__ > 2 || (__GLIBC__ >= 2 && __GLIBC_MINOR__ > 0)
# define LIBIO_IS_FIXED
# endif
# else
# error The libzio requires the GLIBC
# endif
#endif
#if defined __GNUC__
# if defined __USE_ISOC99
# define _cat_pragma(exp) _Pragma(#exp)
# define _weak_pragma(exp) _cat_pragma(weak name)
# else
# define _weak_pragma(exp)
# endif
# define _declare(name) __extension__ extern __typeof__(name) name
# define weak_symbol(name) _weak_pragma(name) _declare(name) __attribute__((weak))
#else
# error The libzio requires the GCC
#endif
#if defined(HAS_ZLIB_H)
# include <zlib.h>
# ifndef NO_WEAK
weak_symbol(gzopen);
weak_symbol(gzdopen);
weak_symbol(gzread);
weak_symbol(gzwrite);
weak_symbol(gzseek);
weak_symbol(gzflush);
weak_symbol(gzclose);
# endif
#endif
#if defined(HAS_BZLIB_H)
# include <bzlib.h>
# ifndef NO_WEAK
weak_symbol(BZ2_bzopen);
weak_symbol(BZ2_bzdopen);
weak_symbol(BZ2_bzread);
weak_symbol(BZ2_bzwrite);
/* no BZ2_bzseek */
weak_symbol(BZ2_bzflush);
weak_symbol(BZ2_bzclose);
# endif
#endif
#if defined(HAS_LZMA_H)
# include <stdint.h>
# include <lzma.h>
# ifndef NO_WEAK
weak_symbol(lzma_easy_encoder);
weak_symbol(lzma_lzma_preset);
weak_symbol(lzma_alone_encoder);
weak_symbol(lzma_auto_decoder);
weak_symbol(lzma_code);
weak_symbol(lzma_end);
# endif
#else /* !HAS_LZMA_H */
# if defined(HAS_LZMADEC_H)
# include <stdint.h>
# include <lzmadec.h>
# ifndef NO_WEAK
weak_symbol(lzmadec_open);
weak_symbol(lzmadec_dopen);
weak_symbol(lzmadec_read);
/* no lzmadec_write() */
weak_symbol(lzmadec_seek);
weak_symbol(lzmadec_close);
/* no lzmadec_flush() */
# endif
# endif
#endif /* !HAS_LZMA_H */
#if defined(HAVE_FOPENCOOKIE)
# undef HAVE_FUNOPEN
__extension__ typedef off_t zio_off_t;
__extension__ typedef int zio_int_t;
# if !defined(LIBIO_IS_FIXED)
__extension__ typedef _IO_cookie_io_functions_t cookie_io_functions_t;
__extension__ typedef ssize_t cookie_read_function_t __P ((void *, char *, size_t));
__extension__ typedef ssize_t cookie_write_function_t __P ((void *, const char *, size_t));
__extension__ typedef int cookie_seek_function_t __P ((void *, off_t, int));
__extension__ typedef int cookie_close_function_t __P ((void *));
# endif
#endif
#if defined(HAVE_FUNOPEN)
__extension__ typedef size_t zio_off_t;
__extension__ typedef fpos_t zio_int_t;
__extension__ typedef int cookie_read_function_t __P ((void *, char *, int));
__extension__ typedef int cookie_write_function_t __P ((void *, const char *, int));
__extension__ typedef fpos_t cookie_seek_function_t __P ((void *, fpos_t, int));
__extension__ typedef int cookie_close_function_t __P ((void *));
__extension__ typedef struct
{
cookie_read_function_t *read;
cookie_write_function_t *write;
cookie_seek_function_t *seek;
cookie_close_function_t *close;
} cookie_io_functions_t;
static __inline__ FILE *fopencookie(void *__restrict,
const char *__restrict,
cookie_io_functions_t) nonnull((1,2)) wur;
static __inline__ FILE *fopencookie(void *__restrict cookie,
const char *__restrict mode unused,
cookie_io_functions_t io_funcs)
{
return funopen(cookie, io_funcs.read, io_funcs.write, io_funcs.seek, io_funcs.close);
}
#endif
#endif /* _ZIO_P_H */
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