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mdbx++: buffer::append_bytes() (backport).

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Леонид Юрьев (Leonid Yuriev) 2024-03-30 23:30:30 +03:00
parent c1d3afcbe1
commit 8f32f4ac98
1 changed files with 73 additions and 0 deletions
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73
mdbx.h++
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@ -2815,6 +2815,79 @@ public:
return append_producer(from_base64(data, ignore_spaces));
}
buffer &append_u8(uint_fast8_t u8) {
if (MDBX_UNLIKELY(tailroom() < 1))
MDBX_CXX20_UNLIKELY reserve_tailroom(1);
*slice_.byte_ptr() = u8;
slice_.iov_len += 1;
return *this;
}
buffer &append_byte(uint_fast8_t byte) { return append_u8(byte); }
buffer &append_u16(uint_fast16_t u16) {
if (MDBX_UNLIKELY(tailroom() < 2))
MDBX_CXX20_UNLIKELY reserve_tailroom(2);
const auto ptr = slice_.byte_ptr();
ptr[0] = uint8_t(u16);
ptr[1] = uint8_t(u16 >> 8);
slice_.iov_len += 2;
return *this;
}
buffer &append_u24(uint_fast32_t u24) {
if (MDBX_UNLIKELY(tailroom() < 3))
MDBX_CXX20_UNLIKELY reserve_tailroom(3);
const auto ptr = slice_.byte_ptr();
ptr[0] = uint8_t(u24);
ptr[1] = uint8_t(u24 >> 8);
ptr[2] = uint8_t(u24 >> 16);
slice_.iov_len += 3;
return *this;
}
buffer &append_u32(uint_fast32_t u32) {
if (MDBX_UNLIKELY(tailroom() < 4))
MDBX_CXX20_UNLIKELY reserve_tailroom(4);
const auto ptr = slice_.byte_ptr();
ptr[0] = uint8_t(u32);
ptr[1] = uint8_t(u32 >> 8);
ptr[2] = uint8_t(u32 >> 16);
ptr[3] = uint8_t(u32 >> 24);
slice_.iov_len += 4;
return *this;
}
buffer &append_u48(uint_fast64_t u48) {
if (MDBX_UNLIKELY(tailroom() < 6))
MDBX_CXX20_UNLIKELY reserve_tailroom(6);
const auto ptr = slice_.byte_ptr();
ptr[0] = uint8_t(u48);
ptr[1] = uint8_t(u48 >> 8);
ptr[2] = uint8_t(u48 >> 16);
ptr[3] = uint8_t(u48 >> 24);
ptr[4] = uint8_t(u48 >> 32);
ptr[5] = uint8_t(u48 >> 40);
slice_.iov_len += 6;
return *this;
}
buffer &append_u64(uint_fast64_t u64) {
if (MDBX_UNLIKELY(tailroom() < 8))
MDBX_CXX20_UNLIKELY reserve_tailroom(8);
const auto ptr = slice_.byte_ptr();
ptr[0] = uint8_t(u64);
ptr[1] = uint8_t(u64 >> 8);
ptr[2] = uint8_t(u64 >> 16);
ptr[3] = uint8_t(u64 >> 24);
ptr[4] = uint8_t(u64 >> 32);
ptr[5] = uint8_t(u64 >> 40);
ptr[6] = uint8_t(u64 >> 48);
ptr[7] = uint8_t(u64 >> 56);
slice_.iov_len += 8;
return *this;
}
//----------------------------------------------------------------------------
template <size_t SIZE>