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Diffstat (limited to 'lib/lufa/Projects/Magstripe/Lib/CircularBitBuffer.c')
m---------lib/lufa0
-rw-r--r--lib/lufa/Projects/Magstripe/Lib/CircularBitBuffer.c115
2 files changed, 0 insertions, 115 deletions
diff --git a/lib/lufa b/lib/lufa
new file mode 160000
+Subproject ce10f7642b0459e409839b23cc91498945119b4
diff --git a/lib/lufa/Projects/Magstripe/Lib/CircularBitBuffer.c b/lib/lufa/Projects/Magstripe/Lib/CircularBitBuffer.c
deleted file mode 100644
index 802d040c5b..0000000000
--- a/lib/lufa/Projects/Magstripe/Lib/CircularBitBuffer.c
+++ /dev/null
@@ -1,115 +0,0 @@
-/*
- LUFA Library
- Copyright (C) Dean Camera, 2017.
-
- dean [at] fourwalledcubicle [dot] com
- www.lufa-lib.org
-*/
-
-/*
- Copyright 2010 Denver Gingerich (denver [at] ossguy [dot] com)
- Copyright 2017 Dean Camera (dean [at] fourwalledcubicle [dot] com)
-
- Permission to use, copy, modify, distribute, and sell this
- software and its documentation for any purpose is hereby granted
- without fee, provided that the above copyright notice appear in
- all copies and that both that the copyright notice and this
- permission notice and warranty disclaimer appear in supporting
- documentation, and that the name of the author not be used in
- advertising or publicity pertaining to distribution of the
- software without specific, written prior permission.
-
- The author disclaims all warranties with regard to this
- software, including all implied warranties of merchantability
- and fitness. In no event shall the author be liable for any
- special, indirect or consequential damages or any damages
- whatsoever resulting from loss of use, data or profits, whether
- in an action of contract, negligence or other tortious action,
- arising out of or in connection with the use or performance of
- this software.
-*/
-
-/** Circular bit buffer library. This will allow for individual bits
- * to be stored in packed form inside circular buffers, to reduce
- * overall RAM usage.
- */
-
-#include "CircularBitBuffer.h"
-
-/** Function to initialize or reset a bit buffer, ready for data to be stored into it. */
-void BitBuffer_Init(BitBuffer_t* const Buffer)
-{
- /* Reset the number of stored bits in the buffer */
- Buffer->Elements = 0;
-
- /* Reset the data in and out pointer structures in the buffer to the first buffer bit */
- Buffer->In.CurrentByte = Buffer->Data;
- Buffer->In.ByteMask = (1 << 0);
- Buffer->Out.CurrentByte = Buffer->Data;
- Buffer->Out.ByteMask = (1 << 0);
-}
-
-/** Function to store the given bit into the given bit buffer. */
-void BitBuffer_StoreNextBit(BitBuffer_t* const Buffer,
- const bool Bit)
-{
- /* If the bit to store is true, set the next bit in the buffer */
- if (Bit)
- *Buffer->In.CurrentByte |= Buffer->In.ByteMask;
-
- /* Increment the number of stored bits in the buffer counter */
- Buffer->Elements++;
-
- /* Check if the current buffer byte is full of stored bits */
- if (Buffer->In.ByteMask == (1 << 7))
- {
- /* Check if the end of the buffer has been reached, if so reset to start of buffer, otherwise advance to next bit */
- if (Buffer->In.CurrentByte != &Buffer->Data[sizeof(Buffer->Data) - 1])
- Buffer->In.CurrentByte++;
- else
- Buffer->In.CurrentByte = Buffer->Data;
-
- /* Reset the storage bit mask in the current buffer byte to the first bit */
- Buffer->In.ByteMask = (1 << 0);
- }
- else
- {
- /* Shift the current storage bit mask to the next bit in the current byte */
- Buffer->In.ByteMask <<= 1;
- }
-}
-
-/** Function to retrieve the next bit stored in the given bit buffer. */
-bool BitBuffer_GetNextBit(BitBuffer_t* const Buffer)
-{
- /* Retrieve the value of the next bit stored in the buffer */
- bool Bit = ((*Buffer->Out.CurrentByte & Buffer->Out.ByteMask) != 0);
-
- /* Clear the buffer bit */
- *Buffer->Out.CurrentByte &= ~Buffer->Out.ByteMask;
-
- /* Decrement the number of stored bits in the buffer counter */
- Buffer->Elements--;
-
- /* Check if the current buffer byte is empty of stored bits */
- if (Buffer->Out.ByteMask == (1 << 7))
- {
- /* Check if the end of the buffer has been reached, if so reset to start of buffer, otherwise advance to next bit */
- if (Buffer->Out.CurrentByte != &Buffer->Data[sizeof(Buffer->Data) - 1])
- Buffer->Out.CurrentByte++;
- else
- Buffer->Out.CurrentByte = Buffer->Data;
-
- /* Reset the retrieval bit mask in the current buffer byte to the first bit */
- Buffer->Out.ByteMask = (1 << 0);
- }
- else
- {
- /* Shift the current retrieval bit mask to the next bit in the current byte */
- Buffer->Out.ByteMask <<= 1;
- }
-
- /* Return the retrieved bit from the buffer */
- return Bit;
-}
-