~mdw / dpkg / blame
| Commit | Line | Data |
|---|---|---|
| 1479465f GJ |
1 | /* |
| 2 | * libdpkg - Debian packaging suite library routines | |
| 3 | * buffer.h - buffer I/O handling routines | |
| 4 | * | |
| 5 | * Copyright © 1999, 2000 Wichert Akkerman <wakkerma@debian.org> | |
| 6 | * Copyright © 2000-2003 Adam Heath <doogie@debian.org> | |
| 7 | * Copyright © 2005 Scott James Remnant | |
| 8 | * Copyright © 2008-2011 Guillem Jover <guillem@debian.org> | |
| 9 | * | |
| 10 | * This is free software; you can redistribute it and/or modify | |
| 11 | * it under the terms of the GNU General Public License as published by | |
| 12 | * the Free Software Foundation; either version 2 of the License, or | |
| 13 | * (at your option) any later version. | |
| 14 | * | |
| 15 | * This is distributed in the hope that it will be useful, | |
| 16 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 18 | * GNU General Public License for more details. | |
| 19 | * | |
| 20 | * You should have received a copy of the GNU General Public License | |
| 21 | * along with this program. If not, see <https://www.gnu.org/licenses/>. | |
| 22 | */ | |
| 23 | ||
| 24 | #ifndef LIBDPKG_BUFFER_H | |
| 25 | #define LIBDPKG_BUFFER_H | |
| 26 | ||
| 27 | #include <sys/types.h> | |
| 28 | ||
| 29 | #include <dpkg/macros.h> | |
| 30 | #include <dpkg/error.h> | |
| 31 | ||
| 32 | DPKG_BEGIN_DECLS | |
| 33 | ||
| 34 | /** | |
| 35 | * @defgroup buffer Buffer I/O | |
| 36 | * @ingroup dpkg-internal | |
| 37 | * @{ | |
| 38 | */ | |
| 39 | ||
| 40 | #define DPKG_BUFFER_SIZE 4096 | |
| 41 | ||
| 42 | #define BUFFER_WRITE_VBUF 1 | |
| 43 | #define BUFFER_WRITE_FD 2 | |
| 44 | #define BUFFER_WRITE_NULL 3 | |
| 45 | ||
| 46 | #define BUFFER_DIGEST_NULL 4 | |
| 47 | #define BUFFER_DIGEST_MD5 5 | |
| 48 | ||
| 49 | #define BUFFER_READ_FD 0 | |
| 50 | ||
| 51 | struct buffer_data { | |
| 52 | union { | |
| 53 | void *ptr; | |
| 54 | int i; | |
| 55 | } arg; | |
| 56 | int type; | |
| 57 | }; | |
| 58 | ||
| 59 | # define buffer_md5(buf, hash, limit) \ | |
| 60 | buffer_digest(buf, hash, BUFFER_DIGEST_MD5, limit) | |
| 61 | ||
| 62 | # define fd_md5(fd, hash, limit, err) \ | |
| 63 | buffer_copy_IntPtr(fd, BUFFER_READ_FD, \ | |
| 64 | hash, BUFFER_DIGEST_MD5, \ | |
| 65 | NULL, BUFFER_WRITE_NULL, \ | |
| 66 | limit, err) | |
| 67 | # define fd_fd_copy(fd1, fd2, limit, err) \ | |
| 68 | buffer_copy_IntInt(fd1, BUFFER_READ_FD, \ | |
| 69 | NULL, BUFFER_DIGEST_NULL, \ | |
| 70 | fd2, BUFFER_WRITE_FD, \ | |
| 71 | limit, err) | |
| 72 | # define fd_fd_copy_and_md5(fd1, fd2, hash, limit, err) \ | |
| 73 | buffer_copy_IntInt(fd1, BUFFER_READ_FD, \ | |
| 74 | hash, BUFFER_DIGEST_MD5, \ | |
| 75 | fd2, BUFFER_WRITE_FD, \ | |
| 76 | limit, err) | |
| 77 | # define fd_vbuf_copy(fd, buf, limit, err) \ | |
| 78 | buffer_copy_IntPtr(fd, BUFFER_READ_FD, \ | |
| 79 | NULL, BUFFER_DIGEST_NULL, \ | |
| 80 | buf, BUFFER_WRITE_VBUF, \ | |
| 81 | limit, err) | |
| 82 | # define fd_skip(fd, limit, err) \ | |
| 83 | buffer_skip_Int(fd, BUFFER_READ_FD, limit, err) | |
| 84 | ||
| 85 | ||
| 86 | off_t buffer_copy_IntPtr(int i, int typeIn, | |
| 87 | void *f, int typeDigest, | |
| 88 | void *p, int typeOut, | |
| 89 | off_t limit, struct dpkg_error *err) | |
| 90 | DPKG_ATTR_REQRET; | |
| 91 | off_t buffer_copy_IntInt(int i1, int typeIn, | |
| 92 | void *f, int typeDigest, | |
| 93 | int i2, int typeOut, | |
| 94 | off_t limit, struct dpkg_error *err) | |
| 95 | DPKG_ATTR_REQRET; | |
| 96 | off_t buffer_skip_Int(int I, int T, off_t limit, struct dpkg_error *err) | |
| 97 | DPKG_ATTR_REQRET; | |
| 98 | off_t buffer_digest(const void *buf, void *hash, int typeDigest, off_t length); | |
| 99 | ||
| 100 | /** @} */ | |
| 101 | ||
| 102 | DPKG_END_DECLS | |
| 103 | ||
| 104 | #endif /* LIBDPKG_BUFFER_H */ |