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a334ad85b8
The PUSH_*() macros already cast their arguments to the expected type, so we don’t need to cast the arguments *again* prior to invoking the macros. Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz> Reviewed-by: Andrew Bartlett <abartlet@samba.org>
125 lines
4.3 KiB
C
125 lines
4.3 KiB
C
/*
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* Macros for handling integer types in byte arrays
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*
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* This file is originally from the libssh.org project
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*
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* Copyright (c) 2018 Andreas Schneider <asn@cryptomilk.org>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef _BYTEARRAY_H
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#define _BYTEARRAY_H
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#define _DATA_BYTE_CONST(data, pos) \
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((uint8_t)(((const uint8_t *)(data))[(pos)]))
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#define _DATA_BYTE(data, pos) \
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(((uint8_t *)(data))[(pos)])
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/*
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* These macros pull or push integer values from byte arrays stored in
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* little-endian byte order.
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*/
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#define PULL_LE_U8(data, pos) \
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(_DATA_BYTE_CONST(data, pos))
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#define PULL_LE_I8(data, pos) \
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(int8_t)PULL_LE_U8(data, pos)
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#define PULL_LE_U16(data, pos) \
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((uint16_t)PULL_LE_U8(data, pos) | ((uint16_t)(PULL_LE_U8(data, (pos) + 1))) << 8)
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#define PULL_LE_I16(data, pos) \
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(int16_t)PULL_LE_U16(data, pos)
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#define PULL_LE_U32(data, pos) \
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((uint32_t)(PULL_LE_U16(data, pos) | ((uint32_t)PULL_LE_U16(data, (pos) + 2)) << 16))
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#define PULL_LE_I32(data, pos) \
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(int32_t)PULL_LE_U32(data, pos)
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#define PULL_LE_U64(data, pos) \
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((uint64_t)(PULL_LE_U32(data, pos) | ((uint64_t)PULL_LE_U32(data, (pos) + 4)) << 32))
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#define PULL_LE_I64(data, pos) \
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(int64_t)PULL_LE_U64(data, pos)
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#define PUSH_LE_U8(data, pos, val) \
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(_DATA_BYTE(data, pos) = ((uint8_t)(val)))
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#define PUSH_LE_I8(data, pos, val) \
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PUSH_LE_U8(data, pos, val)
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#define PUSH_LE_U16(data, pos, val) \
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(PUSH_LE_U8(data, pos, (uint16_t)(val) & 0xff), PUSH_LE_U8(data, (pos) + 1, (uint16_t)(val) >> 8))
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#define PUSH_LE_I16(data, pos, val) \
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PUSH_LE_U16(data, pos, val)
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#define PUSH_LE_U32(data, pos, val) \
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(PUSH_LE_U16(data, pos, (uint32_t)(val) & 0xffff), PUSH_LE_U16(data, (pos) + 2, (uint32_t)(val) >> 16))
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#define PUSH_LE_I32(data, pos, val) \
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PUSH_LE_U32(data, pos, val)
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#define PUSH_LE_U64(data, pos, val) \
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(PUSH_LE_U32(data, pos, (uint64_t)(val) & 0xffffffff), PUSH_LE_U32(data, (pos) + 4, (uint64_t)(val) >> 32))
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#define PUSH_LE_I64(data, pos, val) \
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PUSH_LE_U64(data, pos, val)
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/*
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* These macros pull or push integer values from byte arrays stored in
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* big-endian byte order (network byte order).
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*/
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#define PULL_BE_U8(data, pos) \
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(_DATA_BYTE_CONST(data, pos))
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#define PULL_BE_I8(data, pos) \
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(int8_t)PULL_BE_U8(data, pos)
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#define PULL_BE_U16(data, pos) \
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((((uint16_t)(PULL_BE_U8(data, pos))) << 8) | (uint16_t)PULL_BE_U8(data, (pos) + 1))
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#define PULL_BE_I16(data, pos) \
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(int16_t)PULL_BE_U16(data, pos)
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#define PULL_BE_U32(data, pos) \
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((((uint32_t)PULL_BE_U16(data, pos)) << 16) | (uint32_t)(PULL_BE_U16(data, (pos) + 2)))
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#define PULL_BE_I32(data, pos) \
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(int32_t)PULL_BE_U32(data, pos)
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#define PULL_BE_U64(data, pos) \
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((((uint64_t)PULL_BE_U32(data, pos)) << 32) | (uint64_t)(PULL_BE_U32(data, (pos) + 4)))
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#define PULL_BE_I64(data, pos) \
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(int64_t)PULL_BE_U64(data, pos)
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#define PUSH_BE_U8(data, pos, val) \
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(_DATA_BYTE(data, pos) = ((uint8_t)(val)))
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#define PUSH_BE_I8(data, pos, val) \
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PUSH_BE_U8(data, pos, val)
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#define PUSH_BE_U16(data, pos, val) \
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(PUSH_BE_U8(data, pos, ((uint16_t)(val)) >> 8), PUSH_BE_U8(data, (pos) + 1, (uint16_t)(val) & 0xff))
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#define PUSH_BE_I16(data, pos, val) \
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PUSH_BE_U16(data, pos, val)
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#define PUSH_BE_U32(data, pos, val) \
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(PUSH_BE_U16(data, pos, (uint32_t)(val) >> 16), PUSH_BE_U16(data, (pos) + 2, (uint32_t)(val) & 0xffff))
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#define PUSH_BE_I32(data, pos, val) \
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PUSH_BE_U32(data, pos, val)
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#define PUSH_BE_U64(data, pos, val) \
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(PUSH_BE_U32(data, pos, (uint64_t)(val) >> 32), PUSH_BE_U32(data, (pos) + 4, (uint64_t)(val) & 0xffffffff))
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#define PUSH_BE_I64(data, pos, val) \
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PUSH_BE_U64(data, pos, val)
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#endif /* _BYTEARRAY_H */
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