79 lines
1.9 KiB
C
79 lines
1.9 KiB
C
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// This file is part of the Luau programming language and is licensed under MIT License; see LICENSE.txt for details
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#pragma once
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#if defined(__BYTE_ORDER__) && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
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#include <endian.h>
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#endif
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#include <string.h>
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inline uint8_t* writeu8(uint8_t* target, uint8_t value)
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{
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*target = value;
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return target + sizeof(value);
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}
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inline uint8_t* writeu32(uint8_t* target, uint32_t value)
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{
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#if defined(__BYTE_ORDER__) && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
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value = htole32(value);
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#endif
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memcpy(target, &value, sizeof(value));
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return target + sizeof(value);
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}
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inline uint8_t* writeu64(uint8_t* target, uint64_t value)
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{
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#if defined(__BYTE_ORDER__) && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
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value = htole64(value);
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#endif
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memcpy(target, &value, sizeof(value));
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return target + sizeof(value);
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}
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inline uint8_t* writeuleb128(uint8_t* target, uint64_t value)
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{
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do
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{
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uint8_t byte = value & 0x7f;
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value >>= 7;
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if (value)
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byte |= 0x80;
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*target++ = byte;
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} while (value);
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return target;
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}
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inline uint8_t* writef32(uint8_t* target, float value)
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{
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#if defined(__BYTE_ORDER__) && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
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static_assert(sizeof(float) == sizeof(uint32_t), "type size must match to reinterpret data");
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uint32_t data;
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memcpy(&data, &value, sizeof(value));
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writeu32(target, data);
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#else
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memcpy(target, &value, sizeof(value));
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#endif
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return target + sizeof(value);
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}
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inline uint8_t* writef64(uint8_t* target, double value)
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{
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#if defined(__BYTE_ORDER__) && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
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static_assert(sizeof(double) == sizeof(uint64_t), "type size must match to reinterpret data");
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uint64_t data;
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memcpy(&data, &value, sizeof(value));
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writeu64(target, data);
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#else
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memcpy(target, &value, sizeof(value));
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#endif
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return target + sizeof(value);
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}
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