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/*
* libdpkg - Debian packaging suite library routines
* buffer.h - buffer I/O handling routines
*
* Copyright © 1999, 2000 Wichert Akkerman <wakkerma@debian.org>
* Copyright © 2000-2003 Adam Heath <doogie@debian.org>
* Copyright © 2005 Scott James Remnant
* Copyright © 2008-2011 Guillem Jover <guillem@debian.org>
*
* This 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.
*
* This is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
#ifndef LIBDPKG_BUFFER_H
#define LIBDPKG_BUFFER_H
#include <sys/types.h>
#include <dpkg/macros.h>
#include <dpkg/error.h>
DPKG_BEGIN_DECLS
/**
* @defgroup buffer Buffer I/O
* @ingroup dpkg-internal
* @{
*/
#define DPKG_BUFFER_SIZE (32 * 1024)
#define BUFFER_WRITE_VBUF 1
#define BUFFER_WRITE_FD 2
#define BUFFER_WRITE_NULL 3
#define BUFFER_DIGEST_NULL 4
#define BUFFER_DIGEST_MD5 5
#define BUFFER_READ_FD 0
struct buffer_data {
union {
void *ptr;
int i;
} arg;
int type;
};
# define buffer_md5(buf, hash, limit) \
buffer_digest(buf, hash, BUFFER_DIGEST_MD5, limit)
# define fd_md5(fd, hash, limit, err) \
buffer_copy_IntPtr(fd, BUFFER_READ_FD, \
hash, BUFFER_DIGEST_MD5, \
NULL, BUFFER_WRITE_NULL, \
limit, err)
# define fd_fd_copy(fd1, fd2, limit, err) \
buffer_copy_IntInt(fd1, BUFFER_READ_FD, \
NULL, BUFFER_DIGEST_NULL, \
fd2, BUFFER_WRITE_FD, \
limit, err)
# define fd_fd_copy_and_md5(fd1, fd2, hash, limit, err) \
buffer_copy_IntInt(fd1, BUFFER_READ_FD, \
hash, BUFFER_DIGEST_MD5, \
fd2, BUFFER_WRITE_FD, \
limit, err)
# define fd_vbuf_copy(fd, buf, limit, err) \
buffer_copy_IntPtr(fd, BUFFER_READ_FD, \
NULL, BUFFER_DIGEST_NULL, \
buf, BUFFER_WRITE_VBUF, \
limit, err)
# define fd_skip(fd, limit, err) \
buffer_skip_Int(fd, BUFFER_READ_FD, limit, err)
off_t buffer_copy_IntPtr(int i, int typeIn,
void *f, int typeDigest,
void *p, int typeOut,
off_t limit, struct dpkg_error *err)
DPKG_ATTR_REQRET;
off_t buffer_copy_IntInt(int i1, int typeIn,
void *f, int typeDigest,
int i2, int typeOut,
off_t limit, struct dpkg_error *err)
DPKG_ATTR_REQRET;
off_t buffer_skip_Int(int I, int T, off_t limit, struct dpkg_error *err)
DPKG_ATTR_REQRET;
off_t buffer_digest(const void *buf, void *hash, int typeDigest, off_t length);
/** @} */
DPKG_END_DECLS
#endif /* LIBDPKG_BUFFER_H */
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