| 1 | |
| 2 | * Copyright 2016-2018 NXP
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| 3 | * Copyright (c) 2018-2019, Vladimir Oltean <[email protected]>
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| 4 |
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| 5 | #ifndef _LINUX_PACKING_H
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| 6 | #define _LINUX_PACKING_H
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| 7 |
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| 8 | #include <linux/types.h>
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| 9 | #include <linux/bitops.h>
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| 10 |
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| 11 | #define GEN_PACKED_FIELD_STRUCT(__type) \
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| 12 | struct packed_field_ ## __type { \
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| 13 | __type startbit; \
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| 14 | __type endbit; \
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| 15 | __type offset; \
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| 16 | __type size; \
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| 17 | }
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| 18 |
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| 19 | |
| 20 | * unpacked structures < 256B.
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| 21 |
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| 22 | GEN_PACKED_FIELD_STRUCT(u8);
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| 23 |
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| 24 | |
| 25 | * unpacked structures < 64KB.
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| 26 |
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| 27 | GEN_PACKED_FIELD_STRUCT(u16);
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| 28 |
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| 29 | #define PACKED_FIELD(start, end, struct_name, struct_field) \
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| 30 | { \
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| 31 | (start), \
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| 32 | (end), \
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| 33 | offsetof(struct_name, struct_field), \
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| 34 | sizeof_field(struct_name, struct_field), \
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| 35 | }
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| 36 |
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| 37 | #define CHECK_PACKED_FIELD_OVERLAP(fields, index1, index2) ({ \
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| 38 | typeof(&(fields)[0]) __f = (fields); \
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| 39 | typeof(__f[0]) _f1 = __f[index1]; typeof(__f[0]) _f2 = __f[index2]; \
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| 40 | const bool _ascending = __f[0].startbit < __f[1].startbit; \
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| 41 | BUILD_BUG_ON_MSG(_ascending && _f1.startbit >= _f2.startbit, \
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| 42 | __stringify(fields) " field " __stringify(index2) \
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| 43 | " breaks ascending order"); \
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| 44 | BUILD_BUG_ON_MSG(!_ascending && _f1.startbit <= _f2.startbit, \
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| 45 | __stringify(fields) " field " __stringify(index2) \
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| 46 | " breaks descending order"); \
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| 47 | BUILD_BUG_ON_MSG(max(_f1.endbit, _f2.endbit) <= \
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| 48 | min(_f1.startbit, _f2.startbit), \
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| 49 | __stringify(fields) " field " __stringify(index2) \
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| 50 | " overlaps with previous field"); \
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| 51 | })
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| 52 |
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| 53 | #define CHECK_PACKED_FIELD(fields, index) ({ \
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| 54 | typeof(&(fields)[0]) _f = (fields); \
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| 55 | typeof(_f[0]) __f = _f[index]; \
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| 56 | BUILD_BUG_ON_MSG(__f.startbit < __f.endbit, \
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| 57 | __stringify(fields) " field " __stringify(index) \
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| 58 | " start bit must not be smaller than end bit"); \
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| 59 | BUILD_BUG_ON_MSG(__f.size != 1 && __f.size != 2 && \
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| 60 | __f.size != 4 && __f.size != 8, \
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| 61 | __stringify(fields) " field " __stringify(index) \
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| 62 | " has unsupported unpacked storage size"); \
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| 63 | BUILD_BUG_ON_MSG(__f.startbit - __f.endbit >= BITS_PER_BYTE * __f.size, \
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| 64 | __stringify(fields) " field " __stringify(index) \
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| 65 | " exceeds unpacked storage size"); \
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| 66 | __builtin_choose_expr(index != 0, \
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| 67 | CHECK_PACKED_FIELD_OVERLAP(fields, index - 1, index), \
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| 68 | 1); \
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| 69 | })
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| 70 |
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| 71 | |
| 72 | * Thus, we must check that both the first and last field wit within the
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| 73 | * packed buffer size.
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| 74 |
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| 75 | #define CHECK_PACKED_FIELDS_SIZE(fields, pbuflen) ({ \
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| 76 | typeof(&(fields)[0]) _f = (fields); \
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| 77 | typeof(pbuflen) _len = (pbuflen); \
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| 78 | const size_t num_fields = ARRAY_SIZE(fields); \
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| 79 | BUILD_BUG_ON_MSG(!__builtin_constant_p(_len), \
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| 80 | __stringify(fields) " pbuflen " __stringify(pbuflen) \
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| 81 | " must be a compile time constant"); \
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| 82 | BUILD_BUG_ON_MSG(_f[0].startbit >= BITS_PER_BYTE * _len, \
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| 83 | __stringify(fields) " first field exceeds packed buffer size"); \
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| 84 | BUILD_BUG_ON_MSG(_f[num_fields - 1].startbit >= BITS_PER_BYTE * _len, \
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| 85 | __stringify(fields) " last field exceeds packed buffer size"); \
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| 86 | })
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| 87 |
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| 88 | #define QUIRK_MSB_ON_THE_RIGHT BIT(0)
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| 89 | #define QUIRK_LITTLE_ENDIAN BIT(1)
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| 90 | #define QUIRK_LSW32_IS_FIRST BIT(2)
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| 91 |
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| 92 | enum packing_op {
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| 93 | PACK,
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| 94 | UNPACK,
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| 95 | };
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| 96 |
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| 97 | int packing(void *pbuf, u64 *uval, int startbit, int endbit, size_t pbuflen,
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| 98 | enum packing_op op, u8 quirks);
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| 99 |
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| 100 | int pack(void *pbuf, u64 uval, size_t startbit, size_t endbit, size_t pbuflen,
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| 101 | u8 quirks);
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| 102 |
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| 103 | int unpack(const void *pbuf, u64 *uval, size_t startbit, size_t endbit,
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| 104 | size_t pbuflen, u8 quirks);
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| 105 |
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| 106 | void pack_fields_u8(void *pbuf, size_t pbuflen, const void *ustruct,
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| 107 | const struct packed_field_u8 *fields, size_t num_fields,
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| 108 | u8 quirks);
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| 109 |
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| 110 | void pack_fields_u16(void *pbuf, size_t pbuflen, const void *ustruct,
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| 111 | const struct packed_field_u16 *fields, size_t num_fields,
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| 112 | u8 quirks);
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| 113 |
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| 114 | void unpack_fields_u8(const void *pbuf, size_t pbuflen, void *ustruct,
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| 115 | const struct packed_field_u8 *fields, size_t num_fields,
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| 116 | u8 quirks);
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| 117 |
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| 118 | void unpack_fields_u16(const void *pbuf, size_t pbuflen, void *ustruct,
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| 119 | const struct packed_field_u16 *fields, size_t num_fields,
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| 120 | u8 quirks);
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| 121 |
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| 122 | |
| 123 | *
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| 124 | * They are generated using scripts/gen_packed_field_checks.c, which may be
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| 125 | * built via "make scripts_gen_packed_field_checks". If larger macro sizes are
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| 126 | * needed in the future, please use this program to re-generate the macros and
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| 127 | * insert them here.
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| 128 |
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| 129 |
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| 130 | #define CHECK_PACKED_FIELDS_1(fields) \
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| 131 | CHECK_PACKED_FIELD(fields, 0)
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| 132 |
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| 133 | #define CHECK_PACKED_FIELDS_2(fields) do { \
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| 134 | CHECK_PACKED_FIELDS_1(fields); \
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| 135 | CHECK_PACKED_FIELD(fields, 1); \
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| 136 | } while (0)
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| 137 |
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| 138 | #define CHECK_PACKED_FIELDS_3(fields) do { \
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| 139 | CHECK_PACKED_FIELDS_2(fields); \
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| 140 | CHECK_PACKED_FIELD(fields, 2); \
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| 141 | } while (0)
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| 142 |
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| 143 | #define CHECK_PACKED_FIELDS_4(fields) do { \
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| 144 | CHECK_PACKED_FIELDS_3(fields); \
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| 145 | CHECK_PACKED_FIELD(fields, 3); \
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| 146 | } while (0)
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| 147 |
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| 148 | #define CHECK_PACKED_FIELDS_5(fields) do { \
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| 149 | CHECK_PACKED_FIELDS_4(fields); \
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| 150 | CHECK_PACKED_FIELD(fields, 4); \
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| 151 | } while (0)
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| 152 |
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| 153 | #define CHECK_PACKED_FIELDS_6(fields) do { \
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| 154 | CHECK_PACKED_FIELDS_5(fields); \
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| 155 | CHECK_PACKED_FIELD(fields, 5); \
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| 156 | } while (0)
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| 157 |
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| 158 | #define CHECK_PACKED_FIELDS_7(fields) do { \
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| 159 | CHECK_PACKED_FIELDS_6(fields); \
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| 160 | CHECK_PACKED_FIELD(fields, 6); \
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| 161 | } while (0)
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| 162 |
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| 163 | #define CHECK_PACKED_FIELDS_8(fields) do { \
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| 164 | CHECK_PACKED_FIELDS_7(fields); \
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| 165 | CHECK_PACKED_FIELD(fields, 7); \
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| 166 | } while (0)
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| 167 |
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| 168 | #define CHECK_PACKED_FIELDS_9(fields) do { \
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| 169 | CHECK_PACKED_FIELDS_8(fields); \
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| 170 | CHECK_PACKED_FIELD(fields, 8); \
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| 171 | } while (0)
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| 172 |
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| 173 | #define CHECK_PACKED_FIELDS_10(fields) do { \
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| 174 | CHECK_PACKED_FIELDS_9(fields); \
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| 175 | CHECK_PACKED_FIELD(fields, 9); \
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| 176 | } while (0)
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| 177 |
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| 178 | #define CHECK_PACKED_FIELDS_11(fields) do { \
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| 179 | CHECK_PACKED_FIELDS_10(fields); \
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| 180 | CHECK_PACKED_FIELD(fields, 10); \
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| 181 | } while (0)
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| 182 |
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| 183 | #define CHECK_PACKED_FIELDS_12(fields) do { \
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| 184 | CHECK_PACKED_FIELDS_11(fields); \
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| 185 | CHECK_PACKED_FIELD(fields, 11); \
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| 186 | } while (0)
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| 187 |
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| 188 | #define CHECK_PACKED_FIELDS_13(fields) do { \
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| 189 | CHECK_PACKED_FIELDS_12(fields); \
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| 190 | CHECK_PACKED_FIELD(fields, 12); \
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| 191 | } while (0)
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| 192 |
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| 193 | #define CHECK_PACKED_FIELDS_14(fields) do { \
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| 194 | CHECK_PACKED_FIELDS_13(fields); \
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| 195 | CHECK_PACKED_FIELD(fields, 13); \
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| 196 | } while (0)
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| 197 |
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| 198 | #define CHECK_PACKED_FIELDS_15(fields) do { \
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| 199 | CHECK_PACKED_FIELDS_14(fields); \
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| 200 | CHECK_PACKED_FIELD(fields, 14); \
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| 201 | } while (0)
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| 202 |
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| 203 | #define CHECK_PACKED_FIELDS_16(fields) do { \
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| 204 | CHECK_PACKED_FIELDS_15(fields); \
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| 205 | CHECK_PACKED_FIELD(fields, 15); \
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| 206 | } while (0)
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| 207 |
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| 208 | #define CHECK_PACKED_FIELDS_17(fields) do { \
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| 209 | CHECK_PACKED_FIELDS_16(fields); \
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| 210 | CHECK_PACKED_FIELD(fields, 16); \
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| 211 | } while (0)
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| 212 |
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| 213 | #define CHECK_PACKED_FIELDS_18(fields) do { \
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| 214 | CHECK_PACKED_FIELDS_17(fields); \
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| 215 | CHECK_PACKED_FIELD(fields, 17); \
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| 216 | } while (0)
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| 217 |
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| 218 | #define CHECK_PACKED_FIELDS_19(fields) do { \
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| 219 | CHECK_PACKED_FIELDS_18(fields); \
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| 220 | CHECK_PACKED_FIELD(fields, 18); \
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| 221 | } while (0)
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| 222 |
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| 223 | #define CHECK_PACKED_FIELDS_20(fields) do { \
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| 224 | CHECK_PACKED_FIELDS_19(fields); \
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| 225 | CHECK_PACKED_FIELD(fields, 19); \
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| 226 | } while (0)
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| 227 |
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| 228 | #define CHECK_PACKED_FIELDS_21(fields) do { \
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| 229 | CHECK_PACKED_FIELDS_20(fields); \
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| 230 | CHECK_PACKED_FIELD(fields, 20); \
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| 231 | } while (0)
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| 232 |
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| 233 | #define CHECK_PACKED_FIELDS_22(fields) do { \
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| 234 | CHECK_PACKED_FIELDS_21(fields); \
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| 235 | CHECK_PACKED_FIELD(fields, 21); \
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| 236 | } while (0)
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| 237 |
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| 238 | #define CHECK_PACKED_FIELDS_23(fields) do { \
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| 239 | CHECK_PACKED_FIELDS_22(fields); \
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| 240 | CHECK_PACKED_FIELD(fields, 22); \
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| 241 | } while (0)
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| 242 |
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| 243 | #define CHECK_PACKED_FIELDS_24(fields) do { \
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| 244 | CHECK_PACKED_FIELDS_23(fields); \
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| 245 | CHECK_PACKED_FIELD(fields, 23); \
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| 246 | } while (0)
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| 247 |
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| 248 | #define CHECK_PACKED_FIELDS_25(fields) do { \
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| 249 | CHECK_PACKED_FIELDS_24(fields); \
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| 250 | CHECK_PACKED_FIELD(fields, 24); \
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| 251 | } while (0)
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| 252 |
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| 253 | #define CHECK_PACKED_FIELDS_26(fields) do { \
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| 254 | CHECK_PACKED_FIELDS_25(fields); \
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| 255 | CHECK_PACKED_FIELD(fields, 25); \
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| 256 | } while (0)
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| 257 |
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| 258 | #define CHECK_PACKED_FIELDS_27(fields) do { \
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| 259 | CHECK_PACKED_FIELDS_26(fields); \
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| 260 | CHECK_PACKED_FIELD(fields, 26); \
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| 261 | } while (0)
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| 262 |
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| 263 | #define CHECK_PACKED_FIELDS_28(fields) do { \
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| 264 | CHECK_PACKED_FIELDS_27(fields); \
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| 265 | CHECK_PACKED_FIELD(fields, 27); \
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| 266 | } while (0)
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| 267 |
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| 268 | #define CHECK_PACKED_FIELDS_29(fields) do { \
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| 269 | CHECK_PACKED_FIELDS_28(fields); \
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| 270 | CHECK_PACKED_FIELD(fields, 28); \
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| 271 | } while (0)
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| 272 |
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| 273 | #define CHECK_PACKED_FIELDS_30(fields) do { \
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| 274 | CHECK_PACKED_FIELDS_29(fields); \
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| 275 | CHECK_PACKED_FIELD(fields, 29); \
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| 276 | } while (0)
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| 277 |
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| 278 | #define CHECK_PACKED_FIELDS_31(fields) do { \
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| 279 | CHECK_PACKED_FIELDS_30(fields); \
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| 280 | CHECK_PACKED_FIELD(fields, 30); \
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| 281 | } while (0)
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| 282 |
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| 283 | #define CHECK_PACKED_FIELDS_32(fields) do { \
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| 284 | CHECK_PACKED_FIELDS_31(fields); \
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| 285 | CHECK_PACKED_FIELD(fields, 31); \
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| 286 | } while (0)
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| 287 |
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| 288 | #define CHECK_PACKED_FIELDS_33(fields) do { \
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| 289 | CHECK_PACKED_FIELDS_32(fields); \
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| 290 | CHECK_PACKED_FIELD(fields, 32); \
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| 291 | } while (0)
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| 292 |
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| 293 | #define CHECK_PACKED_FIELDS_34(fields) do { \
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| 294 | CHECK_PACKED_FIELDS_33(fields); \
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| 295 | CHECK_PACKED_FIELD(fields, 33); \
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| 296 | } while (0)
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| 297 |
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| 298 | #define CHECK_PACKED_FIELDS_35(fields) do { \
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| 299 | CHECK_PACKED_FIELDS_34(fields); \
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| 300 | CHECK_PACKED_FIELD(fields, 34); \
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| 301 | } while (0)
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| 302 |
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| 303 | #define CHECK_PACKED_FIELDS_36(fields) do { \
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| 304 | CHECK_PACKED_FIELDS_35(fields); \
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| 305 | CHECK_PACKED_FIELD(fields, 35); \
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| 306 | } while (0)
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| 307 |
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| 308 | #define CHECK_PACKED_FIELDS_37(fields) do { \
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| 309 | CHECK_PACKED_FIELDS_36(fields); \
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| 310 | CHECK_PACKED_FIELD(fields, 36); \
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| 311 | } while (0)
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| 312 |
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| 313 | #define CHECK_PACKED_FIELDS_38(fields) do { \
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| 314 | CHECK_PACKED_FIELDS_37(fields); \
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| 315 | CHECK_PACKED_FIELD(fields, 37); \
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| 316 | } while (0)
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| 317 |
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| 318 | #define CHECK_PACKED_FIELDS_39(fields) do { \
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| 319 | CHECK_PACKED_FIELDS_38(fields); \
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| 320 | CHECK_PACKED_FIELD(fields, 38); \
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| 321 | } while (0)
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| 322 |
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| 323 | #define CHECK_PACKED_FIELDS_40(fields) do { \
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| 324 | CHECK_PACKED_FIELDS_39(fields); \
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| 325 | CHECK_PACKED_FIELD(fields, 39); \
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| 326 | } while (0)
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| 327 |
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| 328 | #define CHECK_PACKED_FIELDS_41(fields) do { \
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| 329 | CHECK_PACKED_FIELDS_40(fields); \
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| 330 | CHECK_PACKED_FIELD(fields, 40); \
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| 331 | } while (0)
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| 332 |
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| 333 | #define CHECK_PACKED_FIELDS_42(fields) do { \
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| 334 | CHECK_PACKED_FIELDS_41(fields); \
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| 335 | CHECK_PACKED_FIELD(fields, 41); \
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| 336 | } while (0)
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| 337 |
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| 338 | #define CHECK_PACKED_FIELDS_43(fields) do { \
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| 339 | CHECK_PACKED_FIELDS_42(fields); \
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| 340 | CHECK_PACKED_FIELD(fields, 42); \
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| 341 | } while (0)
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| 342 |
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| 343 | #define CHECK_PACKED_FIELDS_44(fields) do { \
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| 344 | CHECK_PACKED_FIELDS_43(fields); \
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| 345 | CHECK_PACKED_FIELD(fields, 43); \
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| 346 | } while (0)
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| 347 |
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| 348 | #define CHECK_PACKED_FIELDS_45(fields) do { \
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| 349 | CHECK_PACKED_FIELDS_44(fields); \
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| 350 | CHECK_PACKED_FIELD(fields, 44); \
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| 351 | } while (0)
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| 352 |
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| 353 | #define CHECK_PACKED_FIELDS_46(fields) do { \
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| 354 | CHECK_PACKED_FIELDS_45(fields); \
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| 355 | CHECK_PACKED_FIELD(fields, 45); \
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| 356 | } while (0)
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| 357 |
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| 358 | #define CHECK_PACKED_FIELDS_47(fields) do { \
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| 359 | CHECK_PACKED_FIELDS_46(fields); \
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| 360 | CHECK_PACKED_FIELD(fields, 46); \
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| 361 | } while (0)
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| 362 |
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| 363 | #define CHECK_PACKED_FIELDS_48(fields) do { \
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| 364 | CHECK_PACKED_FIELDS_47(fields); \
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| 365 | CHECK_PACKED_FIELD(fields, 47); \
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| 366 | } while (0)
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| 367 |
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| 368 | #define CHECK_PACKED_FIELDS_49(fields) do { \
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| 369 | CHECK_PACKED_FIELDS_48(fields); \
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| 370 | CHECK_PACKED_FIELD(fields, 48); \
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| 371 | } while (0)
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| 372 |
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| 373 | #define CHECK_PACKED_FIELDS_50(fields) do { \
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| 374 | CHECK_PACKED_FIELDS_49(fields); \
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| 375 | CHECK_PACKED_FIELD(fields, 49); \
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| 376 | } while (0)
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| 377 |
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| 378 | #define CHECK_PACKED_FIELDS(fields) \
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| 379 | __builtin_choose_expr(ARRAY_SIZE(fields) == 1, ({ CHECK_PACKED_FIELDS_1(fields); }), \
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| 380 | __builtin_choose_expr(ARRAY_SIZE(fields) == 2, ({ CHECK_PACKED_FIELDS_2(fields); }), \
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| 381 | __builtin_choose_expr(ARRAY_SIZE(fields) == 3, ({ CHECK_PACKED_FIELDS_3(fields); }), \
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| 382 | __builtin_choose_expr(ARRAY_SIZE(fields) == 4, ({ CHECK_PACKED_FIELDS_4(fields); }), \
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| 383 | __builtin_choose_expr(ARRAY_SIZE(fields) == 5, ({ CHECK_PACKED_FIELDS_5(fields); }), \
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| 384 | __builtin_choose_expr(ARRAY_SIZE(fields) == 6, ({ CHECK_PACKED_FIELDS_6(fields); }), \
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| 385 | __builtin_choose_expr(ARRAY_SIZE(fields) == 7, ({ CHECK_PACKED_FIELDS_7(fields); }), \
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| 386 | __builtin_choose_expr(ARRAY_SIZE(fields) == 8, ({ CHECK_PACKED_FIELDS_8(fields); }), \
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| 387 | __builtin_choose_expr(ARRAY_SIZE(fields) == 9, ({ CHECK_PACKED_FIELDS_9(fields); }), \
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| 388 | __builtin_choose_expr(ARRAY_SIZE(fields) == 10, ({ CHECK_PACKED_FIELDS_10(fields); }), \
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| 389 | __builtin_choose_expr(ARRAY_SIZE(fields) == 11, ({ CHECK_PACKED_FIELDS_11(fields); }), \
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| 390 | __builtin_choose_expr(ARRAY_SIZE(fields) == 12, ({ CHECK_PACKED_FIELDS_12(fields); }), \
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| 391 | __builtin_choose_expr(ARRAY_SIZE(fields) == 13, ({ CHECK_PACKED_FIELDS_13(fields); }), \
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| 392 | __builtin_choose_expr(ARRAY_SIZE(fields) == 14, ({ CHECK_PACKED_FIELDS_14(fields); }), \
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| 393 | __builtin_choose_expr(ARRAY_SIZE(fields) == 15, ({ CHECK_PACKED_FIELDS_15(fields); }), \
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| 394 | __builtin_choose_expr(ARRAY_SIZE(fields) == 16, ({ CHECK_PACKED_FIELDS_16(fields); }), \
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| 395 | __builtin_choose_expr(ARRAY_SIZE(fields) == 17, ({ CHECK_PACKED_FIELDS_17(fields); }), \
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| 396 | __builtin_choose_expr(ARRAY_SIZE(fields) == 18, ({ CHECK_PACKED_FIELDS_18(fields); }), \
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| 397 | __builtin_choose_expr(ARRAY_SIZE(fields) == 19, ({ CHECK_PACKED_FIELDS_19(fields); }), \
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| 398 | __builtin_choose_expr(ARRAY_SIZE(fields) == 20, ({ CHECK_PACKED_FIELDS_20(fields); }), \
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| 399 | __builtin_choose_expr(ARRAY_SIZE(fields) == 21, ({ CHECK_PACKED_FIELDS_21(fields); }), \
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| 400 | __builtin_choose_expr(ARRAY_SIZE(fields) == 22, ({ CHECK_PACKED_FIELDS_22(fields); }), \
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| 401 | __builtin_choose_expr(ARRAY_SIZE(fields) == 23, ({ CHECK_PACKED_FIELDS_23(fields); }), \
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| 402 | __builtin_choose_expr(ARRAY_SIZE(fields) == 24, ({ CHECK_PACKED_FIELDS_24(fields); }), \
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| 403 | __builtin_choose_expr(ARRAY_SIZE(fields) == 25, ({ CHECK_PACKED_FIELDS_25(fields); }), \
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| 404 | __builtin_choose_expr(ARRAY_SIZE(fields) == 26, ({ CHECK_PACKED_FIELDS_26(fields); }), \
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| 405 | __builtin_choose_expr(ARRAY_SIZE(fields) == 27, ({ CHECK_PACKED_FIELDS_27(fields); }), \
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| 406 | __builtin_choose_expr(ARRAY_SIZE(fields) == 28, ({ CHECK_PACKED_FIELDS_28(fields); }), \
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| 407 | __builtin_choose_expr(ARRAY_SIZE(fields) == 29, ({ CHECK_PACKED_FIELDS_29(fields); }), \
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| 408 | __builtin_choose_expr(ARRAY_SIZE(fields) == 30, ({ CHECK_PACKED_FIELDS_30(fields); }), \
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| 409 | __builtin_choose_expr(ARRAY_SIZE(fields) == 31, ({ CHECK_PACKED_FIELDS_31(fields); }), \
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| 410 | __builtin_choose_expr(ARRAY_SIZE(fields) == 32, ({ CHECK_PACKED_FIELDS_32(fields); }), \
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| 411 | __builtin_choose_expr(ARRAY_SIZE(fields) == 33, ({ CHECK_PACKED_FIELDS_33(fields); }), \
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| 412 | __builtin_choose_expr(ARRAY_SIZE(fields) == 34, ({ CHECK_PACKED_FIELDS_34(fields); }), \
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| 413 | __builtin_choose_expr(ARRAY_SIZE(fields) == 35, ({ CHECK_PACKED_FIELDS_35(fields); }), \
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| 414 | __builtin_choose_expr(ARRAY_SIZE(fields) == 36, ({ CHECK_PACKED_FIELDS_36(fields); }), \
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| 415 | __builtin_choose_expr(ARRAY_SIZE(fields) == 37, ({ CHECK_PACKED_FIELDS_37(fields); }), \
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| 416 | __builtin_choose_expr(ARRAY_SIZE(fields) == 38, ({ CHECK_PACKED_FIELDS_38(fields); }), \
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| 417 | __builtin_choose_expr(ARRAY_SIZE(fields) == 39, ({ CHECK_PACKED_FIELDS_39(fields); }), \
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| 418 | __builtin_choose_expr(ARRAY_SIZE(fields) == 40, ({ CHECK_PACKED_FIELDS_40(fields); }), \
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| 419 | __builtin_choose_expr(ARRAY_SIZE(fields) == 41, ({ CHECK_PACKED_FIELDS_41(fields); }), \
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| 420 | __builtin_choose_expr(ARRAY_SIZE(fields) == 42, ({ CHECK_PACKED_FIELDS_42(fields); }), \
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| 421 | __builtin_choose_expr(ARRAY_SIZE(fields) == 43, ({ CHECK_PACKED_FIELDS_43(fields); }), \
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| 422 | __builtin_choose_expr(ARRAY_SIZE(fields) == 44, ({ CHECK_PACKED_FIELDS_44(fields); }), \
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| 423 | __builtin_choose_expr(ARRAY_SIZE(fields) == 45, ({ CHECK_PACKED_FIELDS_45(fields); }), \
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| 424 | __builtin_choose_expr(ARRAY_SIZE(fields) == 46, ({ CHECK_PACKED_FIELDS_46(fields); }), \
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| 425 | __builtin_choose_expr(ARRAY_SIZE(fields) == 47, ({ CHECK_PACKED_FIELDS_47(fields); }), \
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| 426 | __builtin_choose_expr(ARRAY_SIZE(fields) == 48, ({ CHECK_PACKED_FIELDS_48(fields); }), \
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| 427 | __builtin_choose_expr(ARRAY_SIZE(fields) == 49, ({ CHECK_PACKED_FIELDS_49(fields); }), \
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| 428 | __builtin_choose_expr(ARRAY_SIZE(fields) == 50, ({ CHECK_PACKED_FIELDS_50(fields); }), \
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| 429 | ({ BUILD_BUG_ON_MSG(1, "CHECK_PACKED_FIELDS() must be regenerated to support array sizes larger than 50."); }) \
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| 430 | ))))))))))))))))))))))))))))))))))))))))))))))))))
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| 431 |
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| 432 |
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| 433 |
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| 434 | #define pack_fields(pbuf, pbuflen, ustruct, fields, quirks) \
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| 435 | ({ \
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| 436 | CHECK_PACKED_FIELDS(fields); \
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| 437 | CHECK_PACKED_FIELDS_SIZE((fields), (pbuflen)); \
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| 438 | _Generic((fields), \
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| 439 | const struct packed_field_u8 * : pack_fields_u8, \
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| 440 | const struct packed_field_u16 * : pack_fields_u16 \
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| 441 | )((pbuf), (pbuflen), (ustruct), (fields), ARRAY_SIZE(fields), (quirks)); \
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| 442 | })
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| 443 |
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| 444 | #define unpack_fields(pbuf, pbuflen, ustruct, fields, quirks) \
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| 445 | ({ \
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| 446 | CHECK_PACKED_FIELDS(fields); \
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| 447 | CHECK_PACKED_FIELDS_SIZE((fields), (pbuflen)); \
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| 448 | _Generic((fields), \
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| 449 | const struct packed_field_u8 * : unpack_fields_u8, \
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| 450 | const struct packed_field_u16 * : unpack_fields_u16 \
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| 451 | )((pbuf), (pbuflen), (ustruct), (fields), ARRAY_SIZE(fields), (quirks)); \
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| 452 | })
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| 453 |
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| 454 | #endif
|