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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, 2009 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,
- * 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 <http://www.gnu.org/licenses/>.
- */
- #ifndef LIBDPKG_BUFFER_H
- #define LIBDPKG_BUFFER_H
- #include <sys/types.h>
- #include <dpkg/macros.h>
- DPKG_BEGIN_DECLS
- #define BUFFER_WRITE_BUF 0
- #define BUFFER_WRITE_VBUF 1
- #define BUFFER_WRITE_FD 2
- #define BUFFER_WRITE_NULL 3
- #define BUFFER_WRITE_STREAM 4
- #define BUFFER_WRITE_MD5 5
- #define BUFFER_READ_FD 0
- #define BUFFER_READ_STREAM 1
- struct buffer_data {
- union {
- void *ptr;
- int i;
- } arg;
- int type;
- };
- # define buffer_md5(buf, hash, limit) \
- buffer_hash(buf, hash, BUFFER_WRITE_MD5, limit)
- #if HAVE_C99
- # define fd_md5(fd, hash, limit, ...) \
- buffer_copy_IntPtr(fd, BUFFER_READ_FD, hash, BUFFER_WRITE_MD5, \
- limit, __VA_ARGS__)
- # define stream_md5(file, hash, limit, ...) \
- buffer_copy_PtrPtr(file, BUFFER_READ_STREAM, hash, BUFFER_WRITE_MD5, \
- limit, __VA_ARGS__)
- # define fd_fd_copy(fd1, fd2, limit, ...) \
- buffer_copy_IntInt(fd1, BUFFER_READ_FD, fd2, BUFFER_WRITE_FD, \
- limit, __VA_ARGS__)
- # define fd_buf_copy(fd, buf, limit, ...) \
- buffer_copy_IntPtr(fd, BUFFER_READ_FD, buf, BUFFER_WRITE_BUF, \
- limit, __VA_ARGS__)
- # define fd_vbuf_copy(fd, buf, limit, ...) \
- buffer_copy_IntPtr(fd, BUFFER_READ_FD, buf, BUFFER_WRITE_VBUF, \
- limit, __VA_ARGS__)
- # define fd_null_copy(fd, limit, ...) \
- if (lseek(fd, limit, SEEK_CUR) == -1) { \
- if (errno != ESPIPE) \
- ohshite(__VA_ARGS__); \
- buffer_copy_IntPtr(fd, BUFFER_READ_FD, \
- NULL, BUFFER_WRITE_NULL, \
- limit, __VA_ARGS__); \
- }
- # define stream_null_copy(file, limit, ...) \
- if (fseek(file, limit, SEEK_CUR) == -1) { \
- if (errno != EBADF) \
- ohshite(__VA_ARGS__); \
- buffer_copy_PtrPtr(file, BUFFER_READ_STREAM, \
- NULL, BUFFER_WRITE_NULL, \
- limit, __VA_ARGS__); \
- }
- # define stream_fd_copy(file, fd, limit, ...) \
- buffer_copy_PtrInt(file, BUFFER_READ_STREAM, fd, BUFFER_WRITE_FD, \
- limit, __VA_ARGS__)
- #else /* HAVE_C99 */
- # define fd_md5(fd, hash, limit, desc...) \
- buffer_copy_IntPtr(fd, BUFFER_READ_FD, hash, BUFFER_WRITE_MD5, \
- limit, desc)
- # define stream_md5(file, hash, limit, desc...) \
- buffer_copy_PtrPtr(file, BUFFER_READ_STREAM, hash, BUFFER_WRITE_MD5, \
- limit, desc)
- # define fd_fd_copy(fd1, fd2, limit, desc...) \
- buffer_copy_IntInt(fd1, BUFFER_READ_FD, fd2, BUFFER_WRITE_FD, \
- limit, desc)
- # define fd_buf_copy(fd, buf, limit, desc...) \
- buffer_copy_IntPtr(fd, BUFFER_READ_FD, buf, BUFFER_WRITE_BUF, \
- limit, desc)
- # define fd_vbuf_copy(fd, buf, limit, desc...) \
- buffer_copy_IntPtr(fd, BUFFER_READ_FD, buf, BUFFER_WRITE_VBUF, \
- limit, desc)
- # define fd_null_copy(fd, limit, desc...) \
- if (lseek(fd, limit, SEEK_CUR) == -1) { \
- if (errno != ESPIPE) \
- ohshite(desc); \
- buffer_copy_IntPtr(fd, BUFFER_READ_FD, \
- NULL, BUFFER_WRITE_NULL, \
- limit, desc); \
- }
- # define stream_null_copy(file, limit, desc...) \
- if (fseek(file, limit, SEEK_CUR) == -1) { \
- if (errno != EBADF) \
- ohshite(desc); \
- buffer_copy_PtrPtr(file, BUFFER_READ_STREAM, \
- NULL, BUFFER_WRITE_NULL, \
- limit, desc); \
- }
- # define stream_fd_copy(file, fd, limit, desc...)\
- buffer_copy_PtrInt(file, BUFFER_READ_STREAM, fd, BUFFER_WRITE_FD, \
- limit, desc)
- #endif /* HAVE_C99 */
- off_t buffer_copy_PtrInt(void *p, int typeIn, int i, int typeOut,
- off_t limit, const char *desc,
- ...) DPKG_ATTR_PRINTF(6);
- off_t buffer_copy_PtrPtr(void *p1, int typeIn, void *p2, int typeOut,
- off_t limit, const char *desc,
- ...) DPKG_ATTR_PRINTF(6);
- off_t buffer_copy_IntPtr(int i, int typeIn, void *p, int typeOut,
- off_t limit, const char *desc,
- ...) DPKG_ATTR_PRINTF(6);
- off_t buffer_copy_IntInt(int i1, int typeIn, int i2, int typeOut,
- off_t limit, const char *desc,
- ...) DPKG_ATTR_PRINTF(6);
- off_t buffer_hash(const void *buf, void *hash, int typeOut, off_t length);
- off_t buffer_write(struct buffer_data *data, const void *buf,
- off_t length, const char *desc);
- off_t buffer_read(struct buffer_data *data, void *buf,
- off_t length, const char *desc);
- off_t buffer_init(struct buffer_data *read_data,
- struct buffer_data *write_data);
- off_t buffer_done(struct buffer_data *read_data,
- struct buffer_data *write_data);
- off_t buffer_copy(struct buffer_data *read_data,
- struct buffer_data *write_data,
- off_t limit, const char *desc);
- DPKG_END_DECLS
- #endif /* LIBDPKG_BUFFER_H */
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