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Bit array copy algorithm update - Fixed an error with 1 bit lengthed copies (see the original discussion at stackoverflow.com)

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Pavel Kirienko
2015-03-16 19:34:32 +03:00
parent e17ad9fc00
commit 7ecd0a4259
1 changed files with 2 additions and 2 deletions
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libuavcan/src/marshal/uc_bit_array_copy.cpp
+2 -2
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@@ -11,7 +11,7 @@
namespace uavcan
{
static const unsigned char reverse_mask[] = { 0x55U, 0x80U, 0xC0U, 0xE0U, 0xF0U, 0xF8U, 0xFCU, 0xFEU, 0xFFU };
static const unsigned char reverse_mask[] = { 0x00U, 0x80U, 0xC0U, 0xE0U, 0xF0U, 0xF8U, 0xFCU, 0xFEU, 0xFFU };
static const unsigned char reverse_mask_xor[] = { 0xFFU, 0x7FU, 0x3FU, 0x1FU, 0x0FU, 0x07U, 0x03U, 0x01U, 0x00U };
#if UAVCAN_TINY
@@ -23,7 +23,7 @@ static const unsigned char reverse_mask_xor[] = { 0xFFU, 0x7FU, 0x3FU, 0x1FU, 0x
src_len -= CHAR_BIT - dst_offset_modulo; \
} else { \
*dst &= reverse_mask[dst_offset_modulo] | \
reverse_mask_xor[dst_offset_modulo + src_len + 1]; \
reverse_mask_xor[dst_offset_modulo + src_len]; \
c &= reverse_mask[dst_offset_modulo + src_len]; \
src_len = 0; \
} } while (0)