[hcoop/debian/courier-authlib.git] / libs / unicode / unicode_graphemebreak.c

/*
** Copyright 2011 Double Precision, Inc.
** See COPYING for distribution information.
**
*/

#include	"unicode_config.h"
#include	"unicode.h"
#include	<unistd.h>
#include	<stdint.h>
#include	<stdlib.h>

#define UNICODE_GRAPHEMEBREAK_ANY		0x00
#define UNICODE_GRAPHEMEBREAK_CR		0x01
#define UNICODE_GRAPHEMEBREAK_LF		0x02
#define UNICODE_GRAPHEMEBREAK_Control		0x03
#define UNICODE_GRAPHEMEBREAK_Extend		0x04
#define UNICODE_GRAPHEMEBREAK_Prepend		0x05
#define UNICODE_GRAPHEMEBREAK_SpacingMark	0x06
#define UNICODE_GRAPHEMEBREAK_L			0x07
#define UNICODE_GRAPHEMEBREAK_V			0x08
#define UNICODE_GRAPHEMEBREAK_T			0x09
#define UNICODE_GRAPHEMEBREAK_LV		0x0A
#define UNICODE_GRAPHEMEBREAK_LVT		0x0B

#include "graphemebreaktab.h"

int unicode_grapheme_break(unicode_char a, unicode_char b)
{
	uint8_t ac=unicode_tab_lookup(a, unicode_indextab,
			 sizeof(unicode_indextab)/sizeof(unicode_indextab[0]),
			 unicode_rangetab,
			 unicode_classtab,
			 UNICODE_GRAPHEMEBREAK_ANY),
		bc=unicode_tab_lookup(b, unicode_indextab,
			 sizeof(unicode_indextab)/sizeof(unicode_indextab[0]),
			 unicode_rangetab,
			 unicode_classtab,
			 UNICODE_GRAPHEMEBREAK_ANY);

	/* GB1 and GB2 are implied */

	if (ac == UNICODE_GRAPHEMEBREAK_CR && bc == UNICODE_GRAPHEMEBREAK_LF)
		return 0; /* GB3 */


	switch (ac) {
	case UNICODE_GRAPHEMEBREAK_CR:
	case UNICODE_GRAPHEMEBREAK_LF:
	case UNICODE_GRAPHEMEBREAK_Control:
		return 1; /* GB4 */
	default:
		break;
	}

	switch (bc) {
	case UNICODE_GRAPHEMEBREAK_CR:
	case UNICODE_GRAPHEMEBREAK_LF:
	case UNICODE_GRAPHEMEBREAK_Control:
		return 1; /* GB5 */
	default:
		break;
	}

	if (ac == UNICODE_GRAPHEMEBREAK_L)
		switch (bc) {
		case UNICODE_GRAPHEMEBREAK_L:
		case UNICODE_GRAPHEMEBREAK_V:
		case UNICODE_GRAPHEMEBREAK_LV:
		case UNICODE_GRAPHEMEBREAK_LVT:
			return 0; /* GB6 */
		}

	if ((ac == UNICODE_GRAPHEMEBREAK_LV ||
	     ac == UNICODE_GRAPHEMEBREAK_V) &&
	    (bc == UNICODE_GRAPHEMEBREAK_V ||
	     bc == UNICODE_GRAPHEMEBREAK_T))
		return 0; /* GB7 */

	if ((ac == UNICODE_GRAPHEMEBREAK_LVT ||
	     ac == UNICODE_GRAPHEMEBREAK_T) &&
	    bc == UNICODE_GRAPHEMEBREAK_T)
		return 0; /* GB8 */

	if (bc == UNICODE_GRAPHEMEBREAK_Extend)
		return 0; /* GB9 */

	if (bc == UNICODE_GRAPHEMEBREAK_SpacingMark)
		return 0; /* GB9a */

	if (ac == UNICODE_GRAPHEMEBREAK_Prepend)
		return 0; /* GB9b */

	return 1; /* GB10 */
}
Commit	Line	Data
b0322a85 CE	1	/*
	2	** Copyright 2011 Double Precision, Inc.
	3	** See COPYING for distribution information.
	4	**
	5	*/
	6
	7	#include "unicode_config.h"
	8	#include "unicode.h"
	9	#include <unistd.h>
	10	#include <stdint.h>
	11	#include <stdlib.h>
	12
	13	#define UNICODE_GRAPHEMEBREAK_ANY 0x00
	14	#define UNICODE_GRAPHEMEBREAK_CR 0x01
	15	#define UNICODE_GRAPHEMEBREAK_LF 0x02
	16	#define UNICODE_GRAPHEMEBREAK_Control 0x03
	17	#define UNICODE_GRAPHEMEBREAK_Extend 0x04
	18	#define UNICODE_GRAPHEMEBREAK_Prepend 0x05
	19	#define UNICODE_GRAPHEMEBREAK_SpacingMark 0x06
	20	#define UNICODE_GRAPHEMEBREAK_L 0x07
	21	#define UNICODE_GRAPHEMEBREAK_V 0x08
	22	#define UNICODE_GRAPHEMEBREAK_T 0x09
	23	#define UNICODE_GRAPHEMEBREAK_LV 0x0A
	24	#define UNICODE_GRAPHEMEBREAK_LVT 0x0B
	25
	26	#include "graphemebreaktab.h"
	27
	28	int unicode_grapheme_break(unicode_char a, unicode_char b)
	29	{
	30	uint8_t ac=unicode_tab_lookup(a, unicode_indextab,
	31	sizeof(unicode_indextab)/sizeof(unicode_indextab[0]),
	32	unicode_rangetab,
	33	unicode_classtab,
	34	UNICODE_GRAPHEMEBREAK_ANY),
	35	bc=unicode_tab_lookup(b, unicode_indextab,
	36	sizeof(unicode_indextab)/sizeof(unicode_indextab[0]),
	37	unicode_rangetab,
	38	unicode_classtab,
	39	UNICODE_GRAPHEMEBREAK_ANY);
	40
	41	/* GB1 and GB2 are implied */
	42
	43	if (ac == UNICODE_GRAPHEMEBREAK_CR && bc == UNICODE_GRAPHEMEBREAK_LF)
	44	return 0; /* GB3 */
	45
	46
	47	switch (ac) {
	48	case UNICODE_GRAPHEMEBREAK_CR:
	49	case UNICODE_GRAPHEMEBREAK_LF:
	50	case UNICODE_GRAPHEMEBREAK_Control:
	51	return 1; /* GB4 */
	52	default:
	53	break;
	54	}
	55
	56	switch (bc) {
	57	case UNICODE_GRAPHEMEBREAK_CR:
	58	case UNICODE_GRAPHEMEBREAK_LF:
	59	case UNICODE_GRAPHEMEBREAK_Control:
	60	return 1; /* GB5 */
	61	default:
	62	break;
	63	}
	64
65	if (ac == UNICODE_GRAPHEMEBREAK_L)
66	switch (bc) {
67	case UNICODE_GRAPHEMEBREAK_L:
68	case UNICODE_GRAPHEMEBREAK_V:
69	case UNICODE_GRAPHEMEBREAK_LV:
70	case UNICODE_GRAPHEMEBREAK_LVT:
71	return 0; /* GB6 */
72	}
73
74	if ((ac == UNICODE_GRAPHEMEBREAK_LV \|\|
75	ac == UNICODE_GRAPHEMEBREAK_V) &&
76	(bc == UNICODE_GRAPHEMEBREAK_V \|\|
77	bc == UNICODE_GRAPHEMEBREAK_T))
78	return 0; /* GB7 */
79
80	if ((ac == UNICODE_GRAPHEMEBREAK_LVT \|\|
81	ac == UNICODE_GRAPHEMEBREAK_T) &&
82	bc == UNICODE_GRAPHEMEBREAK_T)
83	return 0; /* GB8 */
84
85	if (bc == UNICODE_GRAPHEMEBREAK_Extend)
86	return 0; /* GB9 */
87
88	if (bc == UNICODE_GRAPHEMEBREAK_SpacingMark)
89	return 0; /* GB9a */
90
91	if (ac == UNICODE_GRAPHEMEBREAK_Prepend)
92	return 0; /* GB9b */
93
94	return 1; /* GB10 */
95	}