1 a31db67d 2004-04-21 devnull /*
  2 a31db67d 2004-04-21 devnull 	following astonishing goo courtesy of kogure.
  3 a31db67d 2004-04-21 devnull */
  4 a31db67d 2004-04-21 devnull /*
  5 a31db67d 2004-04-21 devnull  * MicroSoft Kanji Encoding (SJIS) Transformation
  6 a31db67d 2004-04-21 devnull  */
  7 a31db67d 2004-04-21 devnull 
  8 a31db67d 2004-04-21 devnull /*
  9 a31db67d 2004-04-21 devnull  * void
 10 a31db67d 2004-04-21 devnull  * J2S(unsigned char *_h, unsigned char *_l)
 11 a31db67d 2004-04-21 devnull  *	JIS X 208 to MS kanji transformation.
 12 a31db67d 2004-04-21 devnull  *
 13 a31db67d 2004-04-21 devnull  * Calling/Exit State:
 14 a31db67d 2004-04-21 devnull  *	_h and _l should be in their valid range.
 15 a31db67d 2004-04-21 devnull  *	No return value.
 16 a31db67d 2004-04-21 devnull  */
 17 a31db67d 2004-04-21 devnull #define J2S(_h, _l) { \
 18 a31db67d 2004-04-21 devnull 	/* lower: 21-7e >> 40-9d,9e-fb >> 40-7e,(skip 7f),80-fc */ \
 19 a31db67d 2004-04-21 devnull 	if (((_l) += (((_h)-- % 2) ? 0x1f : 0x7d)) > 0x7e) (_l)++; \
 20 a31db67d 2004-04-21 devnull 	/* upper: 21-7e >> 81-af >> 81-9f,(skip a0-df),e0-ef */ \
 21 a31db67d 2004-04-21 devnull 	if (((_h) = ((_h) / 2 + 0x71)) > 0x9f) (_h) += 0x40; \
 22 a31db67d 2004-04-21 devnull }
 23 a31db67d 2004-04-21 devnull 
 24 a31db67d 2004-04-21 devnull /*
 25 a31db67d 2004-04-21 devnull  * void
 26 a31db67d 2004-04-21 devnull  * S2J(unsigned char *_h, unsigned char *_l)
 27 a31db67d 2004-04-21 devnull  *	MS kanji to JIS X 208 transformation.
 28 a31db67d 2004-04-21 devnull  *
 29 a31db67d 2004-04-21 devnull  * Calling/Exit State:
 30 a31db67d 2004-04-21 devnull  *	_h and _l should be in valid range.
 31 a31db67d 2004-04-21 devnull  *	No return value.
 32 a31db67d 2004-04-21 devnull  */
 33 a31db67d 2004-04-21 devnull #define S2J(_h, _l) { \
 34 a31db67d 2004-04-21 devnull 	/* lower: 40-7e,80-fc >> 21-5f,61-dd >> 21-7e,7f-dc */ \
 35 a31db67d 2004-04-21 devnull 	if (((_l) -= 0x1f) > 0x60) (_l)--; \
 36 a31db67d 2004-04-21 devnull 	/* upper: 81-9f,e0-ef >> 00-1e,5f-6e >> 00-2e >> 21-7d */ \
 37 a31db67d 2004-04-21 devnull 	if (((_h) -= 0x81) > 0x5e) (_h) -= 0x40; (_h) *= 2, (_h) += 0x21; \
 38 a31db67d 2004-04-21 devnull 	/* upper: ,21-7d >> ,22-7e ; lower: ,7f-dc >> ,21-7e */ \
 39 a31db67d 2004-04-21 devnull 	if ((_l) > 0x7e) (_h)++, (_l) -= 0x5e; \
 40 a31db67d 2004-04-21 devnull }
 41 a31db67d 2004-04-21 devnull 
 42 a31db67d 2004-04-21 devnull /*
 43 a31db67d 2004-04-21 devnull  * int
 44 a31db67d 2004-04-21 devnull  * ISJKANA(const unsigned char *_b)
 45 a31db67d 2004-04-21 devnull  *	Tests given byte is in the range of JIS X 0201 katakana.
 46 a31db67d 2004-04-21 devnull  *
 47 a31db67d 2004-04-21 devnull  * Calling/Exit State:
 48 a31db67d 2004-04-21 devnull  *	Returns 1 if it is, or 0 otherwise.
 49 a31db67d 2004-04-21 devnull  */
 50 a31db67d 2004-04-21 devnull #define	ISJKANA(_b)	(0xa0 <= (_b) && (_b) < 0xe0)
 51 a31db67d 2004-04-21 devnull 
 52 a31db67d 2004-04-21 devnull /*
 53 a31db67d 2004-04-21 devnull  * int
 54 a31db67d 2004-04-21 devnull  * CANS2JH(const unsigned char *_h)
 55 a31db67d 2004-04-21 devnull  *	Tests given byte is in the range of valid first byte of MS
 56 a31db67d 2004-04-21 devnull  *	kanji code; either acts as a subroutine of CANS2J() macro
 57 a31db67d 2004-04-21 devnull  *	or can be used to parse MS kanji encoded strings.
 58 a31db67d 2004-04-21 devnull  *
 59 a31db67d 2004-04-21 devnull  * Calling/Exit State:
 60 a31db67d 2004-04-21 devnull  *	Returns 1 if it is, or 0 otherwise.
 61 a31db67d 2004-04-21 devnull  */
 62 a31db67d 2004-04-21 devnull #define CANS2JH(_h)	((0x81 <= (_h) && (_h) < 0xf0) && !ISJKANA(_h))
 63 a31db67d 2004-04-21 devnull 
 64 a31db67d 2004-04-21 devnull /*
 65 a31db67d 2004-04-21 devnull  * int
 66 a31db67d 2004-04-21 devnull  * CANS2JL(const unsigned char *_l)
 67 a31db67d 2004-04-21 devnull  *	Tests given byte is in the range of valid second byte of MS
 68 a31db67d 2004-04-21 devnull  *	kanji code; acts as a subroutine of CANS2J() macro.
 69 a31db67d 2004-04-21 devnull  *
 70 a31db67d 2004-04-21 devnull  * Calling/Exit State:
 71 a31db67d 2004-04-21 devnull  *	Returns 1 if it is, or 0 otherwise.
 72 a31db67d 2004-04-21 devnull  */
 73 a31db67d 2004-04-21 devnull #define CANS2JL(_l)	(0x40 <= (_l) && (_l) < 0xfd && (_l) != 0x7f)
 74 a31db67d 2004-04-21 devnull 
 75 a31db67d 2004-04-21 devnull /*
 76 a31db67d 2004-04-21 devnull  * int
 77 a31db67d 2004-04-21 devnull  * CANS2J(const unsigned char *_h, const unsinged char *_l)
 78 a31db67d 2004-04-21 devnull  *	Tests given bytes form a MS kanji code point which can be
 79 a31db67d 2004-04-21 devnull  *	transformed to a valid JIS X 208 code point.
 80 a31db67d 2004-04-21 devnull  *
 81 a31db67d 2004-04-21 devnull  * Calling/Exit State:
 82 a31db67d 2004-04-21 devnull  *	Returns 1 if they are, or 0 otherwise.
 83 a31db67d 2004-04-21 devnull  */
 84 a31db67d 2004-04-21 devnull #define CANS2J(_h, _l)  (CANS2JH(_h) && CANS2JL(_l))
 85 a31db67d 2004-04-21 devnull 
 86 a31db67d 2004-04-21 devnull /*
 87 a31db67d 2004-04-21 devnull  * int
 88 a31db67d 2004-04-21 devnull  * CANJ2SB(const unsigned char *_b)
 89 a31db67d 2004-04-21 devnull  *	Tests given bytes is in the range of valid 94 graphic
 90 a31db67d 2004-04-21 devnull  *	character set; acts as a subroutine of CANJ2S() macro.
 91 a31db67d 2004-04-21 devnull  *
 92 a31db67d 2004-04-21 devnull  * Calling/Exit State:
 93 a31db67d 2004-04-21 devnull  *	Returns 1 if it is, or 0 otherwise.
 94 a31db67d 2004-04-21 devnull  */
 95 a31db67d 2004-04-21 devnull #define CANJ2SB(_b)	(0x21 <= (_b) && (_b) < 0x7f)
 96 a31db67d 2004-04-21 devnull 
 97 a31db67d 2004-04-21 devnull /*
 98 a31db67d 2004-04-21 devnull  * int
 99 a31db67d 2004-04-21 devnull  * CANJ2S(const unsigned char *_h, const unsigned char *_l)
100 a31db67d 2004-04-21 devnull  *	Tests given bytes form valid JIS X 208 code points
101 a31db67d 2004-04-21 devnull  *	(which can be transformed to MS kanji).
102 a31db67d 2004-04-21 devnull  *
103 a31db67d 2004-04-21 devnull  * Calling/Exit State:
104 a31db67d 2004-04-21 devnull  *	Returns 1 if they are, or 0 otherwise.
105 a31db67d 2004-04-21 devnull  */
106 a31db67d 2004-04-21 devnull #define CANJ2S(_h, _l)	(CANJ2SB(_h) && CANJ2SB(_l))
107 a31db67d 2004-04-21 devnull