52 lines
1.5 KiB
C
52 lines
1.5 KiB
C
/*
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* Copyright (c) 2021 Juhani 'nortti' Krekelä.
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*
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* sortix/ps2mouse.h
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* Defines macros for the PS/2 mouse protocol.
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*/
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#ifndef _INCLUDE_SORTIX_PS2MOUSE_H
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#define _INCLUDE_SORTIX_PS2MOUSE_H
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#define MOUSE_PACKET_SIZE 3
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#define MOUSE_BUTTON_LEFT (1 << 0)
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#define MOUSE_BUTTON_RIGHT (1 << 1)
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#define MOUSE_BUTTON_MIDDLE (1 << 2)
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#define MOUSE_ALWAYS_1 (1 << 3)
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#define MOUSE_X_SIGN (1 << 4)
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#define MOUSE_Y_SIGN (1 << 5)
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#define MOUSE_X_OVERFLOW (1 << 6)
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#define MOUSE_Y_OVERFLOW (1 << 7)
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#define MOUSE_X(bytes) \
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( \
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(bytes)[0] & (MOUSE_X_OVERFLOW | MOUSE_Y_OVERFLOW) ? \
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0 : \
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(bytes)[1] - ((bytes)[0] & MOUSE_X_SIGN ? 256 : 0) \
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)
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#define MOUSE_Y(bytes) \
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(\
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(bytes)[0] & (MOUSE_X_OVERFLOW | MOUSE_Y_OVERFLOW) ? \
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0 : \
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-((bytes)[2] - ((bytes)[0] & MOUSE_Y_SIGN ? 256 : 0)) \
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)
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#endif
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