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author | Andreas Schneider <asn@cryptomilk.org> | 2018-09-29 14:06:00 +0200 |
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committer | Andreas Schneider <asn@cryptomilk.org> | 2018-10-05 14:38:43 +0200 |
commit | 85a274ff3c21fafefbdca4cbd95c9b4a076bfdb8 (patch) | |
tree | a66f3c4452b049fb3af39851f44d4b24607f07f1 /include | |
parent | e210b61148cb9f9920db641777fa80352455f823 (diff) | |
download | libssh-85a274ff3c21fafefbdca4cbd95c9b4a076bfdb8.tar.gz libssh-85a274ff3c21fafefbdca4cbd95c9b4a076bfdb8.tar.xz libssh-85a274ff3c21fafefbdca4cbd95c9b4a076bfdb8.zip |
include: Add macros for bytearray handling
Signed-off-by: Andreas Schneider <asn@cryptomilk.org>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
Diffstat (limited to 'include')
-rw-r--r-- | include/libssh/bytearray.h | 90 |
1 files changed, 90 insertions, 0 deletions
diff --git a/include/libssh/bytearray.h b/include/libssh/bytearray.h new file mode 100644 index 00000000..0c0690d6 --- /dev/null +++ b/include/libssh/bytearray.h @@ -0,0 +1,90 @@ +/* + * This file is part of the SSH Library + * + * Copyright (c) 2018 Andreas Schneider <asn@cryptomilk.org> + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * This library 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 + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ +#ifndef _BYTEARRAY_H +#define _BYTEARRAY_H + +#define _DATA_BYTE_CONST(data, pos) \ + ((uint8_t)(((const uint8_t *)(data))[(pos)])) + +#define _DATA_BYTE(data, pos) \ + (((uint8_t *)(data))[(pos)]) + +/* + * These macros pull or push integer values from byte arrays stored in + * little-endian byte order. + */ +#define PULL_LE_U8(data, pos) \ + (_DATA_BYTE_CONST(data, pos)) + +#define PULL_LE_U16(data, pos) \ + ((uint16_t)PULL_LE_U8(data, pos) | ((uint16_t)(PULL_LE_U8(data, (pos) + 1))) << 8) + +#define PULL_LE_U32(data, pos) \ + ((uint32_t)(PULL_LE_U16(data, pos) | ((uint32_t)PULL_LE_U16(data, (pos) + 2)) << 16)) + +#define PULL_LE_U64(data, pos) \ + ((uint64_t)(PULL_LE_U32(data, pos) | ((uint64_t)PULL_LE_U32(data, (pos) + 4)) << 32)) + + +#define PUSH_LE_U8(data, pos, val) \ + (_DATA_BYTE(data, pos) = ((uint8_t)(val))) + +#define PUSH_LE_U16(data, pos, val) \ + (PUSH_LE_U8((data), (pos), (uint8_t)((uint16_t)(val) & 0xff)), PUSH_LE_U8((data), (pos) + 1, (uint8_t)((uint16_t)(val) >> 8))) + +#define PUSH_LE_U32(data, pos, val) \ + (PUSH_LE_U16((data), (pos), (uint16_t)((uint32_t)(val) & 0xffff)), PUSH_LE_U16((data), (pos) + 2, (uint16_t)((uint32_t)(val) >> 16))) + +#define PUSH_LE_U64(data, pos, val) \ + (PUSH_LE_U32((data), (pos), (uint32_t)((uint64_t)(val) & 0xffffffff)), PUSH_LE_U32((data), (pos) + 4, (uint32_t)((uint64_t)(val) >> 32))) + + + +/* + * These macros pull or push integer values from byte arrays stored in + * big-endian byte order (network byte order). + */ +#define PULL_BE_U8(data, pos) \ + (_DATA_BYTE_CONST(data, pos)) + +#define PULL_BE_U16(data, pos) \ + ((((uint16_t)(PULL_BE_U8(data, pos))) << 8) | (uint16_t)PULL_BE_U8(data, (pos) + 1)) + +#define PULL_BE_U32(data, pos) \ + ((((uint32_t)PULL_BE_U16(data, pos)) << 16) | (uint32_t)(PULL_BE_U16(data, (pos) + 2))) + +#define PULL_BE_U64(data, pos) \ + ((((uint64_t)PULL_BE_U32(data, pos)) << 32) | (uint64_t)(PULL_BE_U32(data, (pos) + 4))) + + + +#define PUSH_BE_U8(data, pos, val) \ + (_DATA_BYTE(data, pos) = ((uint8_t)(val))) + +#define PUSH_BE_U16(data, pos, val) \ + (PUSH_BE_U8((data), (pos), (uint8_t)(((uint16_t)(val)) >> 8)), PUSH_BE_U8((data), (pos) + 1, (uint8_t)((val) & 0xff))) + +#define PUSH_BE_U32(data, pos, val) \ + (PUSH_BE_U16((data), (pos), (uint16_t)(((uint32_t)(val)) >> 16)), PUSH_BE_U16((data), (pos) + 2, (uint16_t)((val) & 0xffff))) + +#define PUSH_BE_U64(data, pos, val) \ + (PUSH_BE_U32((data), (pos), (uint32_t)(((uint64_t)(val)) >> 32)), PUSH_BE_U32((data), (pos) + 4, (uint32_t)((val) & 0xffffffff))) + +#endif /* _BYTEARRAY_H */ |