62 lines
2.3 KiB
C++
62 lines
2.3 KiB
C++
#pragma once
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#include <cstdint>
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#if defined(__GNUC__) && !defined(__clang__)
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#error "GCC is currently not supported due to volatile union packed struct issue. Use clang instead"
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#endif
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#if __GNUC__ > 4 || (__GNUC__ == 4 && (__GNUC_MINOR__ >= 4)) || defined(__clang__) || defined(__TINYC__)
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#if defined(__TINYC__)
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#define PACKED(x, s) \
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_Pragma("pack(1)") \
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union { \
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s value; \
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x __attribute__((packed)) fields; \
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} \
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_Pragma("pack(1)")
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#define PACKEDM(x, s, n) \
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_Pragma("pack(1)") \
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union { \
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s value[n]; \
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x __attribute__((packed)) fields; \
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} \
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_Pragma("pack(1)")
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#else
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#define PACKED(x, s) \
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union { \
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s value; \
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x __attribute__((packed, aligned(sizeof(s)))) fields; \
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} __attribute__((packed, aligned(sizeof(s))))
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#define PACKEDA(n, a, x, s) \
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union n { \
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static const uint32_t ADDRESS = BASE_ADDRESS + a; \
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s value; \
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x __attribute__((packed, aligned(sizeof(s)))) fields; \
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} __attribute__((packed, aligned(sizeof(s))))
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#define PACKEDM(x, s, i) \
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union { \
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s value[i]; \
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x __attribute__((packed, aligned(sizeof(s)))) fields; \
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} __attribute__((packed, aligned(sizeof(s))))
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#define PACKEDAM(n, a, x, s, i) \
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union n { \
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static const uint32_t ADDRESS = BASE_ADDRESS + a; \
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s value[i]; \
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x __attribute__((packed, aligned(sizeof(s)))) fields; \
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} __attribute__((packed, aligned(sizeof(s))))
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#endif
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#else
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#error "Packed bit-fields of type char were not properly bit-packed on many targets prior to GCC 4.4, upgrade to GCC >= 4.4."
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#endif |