93 lines
2.5 KiB
C
93 lines
2.5 KiB
C
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#ifndef G3D_BIN_h
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#define G3D_BIN_h
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#define _BIT(N, K) (((N >> (3*K)) & 1) << K)
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#define _OCT_CODED_BIN(N) \
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(_BIT(N, 0) | _BIT(N, 1) | _BIT(N, 2) | _BIT(N, 3) | \
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_BIT(N, 4) | _BIT(N, 5) | _BIT(N, 6) | _BIT(N, 7) | \
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_BIT(N, | _BIT(N, 9) | _BIT(N, 10))
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/**
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\def BIN11()
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\brief Create a binary constant up to 11 digits long at compile time.
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\code
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int i = BIN(01100101001)
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\endcode
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\cite By Kaz Kylheku http://www.velocityreviews.com/forums/t620780-mathew-hendrys-macro-for-binary-integer-literals.html
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\sa BIN8(), BIN11(), BIN16(), BIN32()
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*/
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#define BIN11(N) _OCT_CODED_BIN(0 ## N ## UL)
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/* turn a numeric literal into a hex constant
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(avoids problems with leading zeroes)
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8-bit constants max value 0x11111111, always fits in unsigned long
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*/
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#define HEX__(n) 0x##n##LU
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/* 8-bit conversion function */
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#define B8__(x) ((x&0x0000000FLU)?1:0) \
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+((x&0x000000F0LU)?2:0) \
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+((x&0x00000F00LU)?4:0) \
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+((x&0x0000F000LU)?8:0) \
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+((x&0x000F0000LU)?16:0) \
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+((x&0x00F00000LU)?32:0) \
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+((x&0x0F000000LU)?64:0) \
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+((x&0xF0000000LU)?128:0)
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/**
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\def BIN8()
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\brief Generate a 16-bit constant in binary notation, in 8-bit strings.
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The most significant byte is first.
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\code
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unsigned int i = BIN8(01010101); // 85
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\endcode
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\cite Tom Torfs http://groups.google.com/group/comp.arch.embedded/msg/9d430b6d3da12c8f
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\sa BIN8(), BIN11(), BIN16(), BIN32()
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*/
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#define BIN8(d) ((unsigned char)B8__(HEX__(d)))
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/** \def BIN16()
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\brief Generate a 16-bit constant in binary notation, in 8-bit strings.
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The most significant byte is first.
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\code
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unsigned int i = BIN16(10101010,01010101); // 43605
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\endcode
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\cite Tom Torfs http://groups.google.com/group/comp.arch.embedded/msg/9d430b6d3da12c8f
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\sa BIN8(), BIN11(), BIN16(), BIN32()
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*/
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#define BIN16(dmsb, dlsb) (((unsigned short)BIN8(dmsb) << 8) + BIN8(dlsb))
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/**
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\def BIN32()
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\brief Generate a 32-bit constant in binary notation, in 8-bit strings.
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The most significant byte is first.
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\code
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unsigned int = BIN32(10000000,11111111,10101010,01010101); // 2164238933
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\endcode
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\cite Tom Torfs http://groups.google.com/group/comp.arch.embedded/msg/9d430b6d3da12c8f
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\sa BIN8(), BIN11(), BIN16(), BIN32()
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*/
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#define BIN32(dmsb,db2,db3,dlsb) \
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(((unsigned long)BIN8(dmsb) << 24) + \
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((unsigned long)BIN8(db2) << 16) + \
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((unsigned long)BIN8(db3) << 8) + \
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BIN8(dlsb))
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#endif
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