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Commit f0a8d84f authored by Thomas Meyer's avatar Thomas Meyer Committed by Greg Kroah-Hartman
Browse files

vt: Use bsearch library function in is_double_width 



Use bsearch library function instead of duplicated functionality.

Signed-off-by: default avatarThomas Meyer <thomas@m3y3r.de>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent a9be9270

drivers/tty/vt/vt.c

+14 −15
Original line number Diff line number Diff line
@@ -102,6 +102,7 @@ 
#include <linux/uaccess.h>

#include <linux/kdb.h>

#include <linux/ctype.h>

#include <linux/bsearch.h>



#define MAX_NR_CON_DRIVER 16
@@ -2142,22 +2143,15 @@ struct interval { 
	uint32_t last;

};



static int bisearch(uint32_t ucs, const struct interval *table, int max)

static int ucs_cmp(const void *key, const void *elt)

{

	int min = 0;

	int mid;

	uint32_t ucs = *(uint32_t *)key;

	struct interval e = *(struct interval *) elt;



	if (ucs < table[0].first || ucs > table[max].last)

		return 0;

	while (max >= min) {

		mid = (min + max) / 2;

		if (ucs > table[mid].last)

			min = mid + 1;

		else if (ucs < table[mid].first)

			max = mid - 1;

		else

	if (ucs > e.last)

		return 1;

	}

	else if (ucs < e.first)

		return -1;

	return 0;

}
@@ -2169,7 +2163,12 @@ static int is_double_width(uint32_t ucs) 
		{ 0xFE10, 0xFE19 }, { 0xFE30, 0xFE6F }, { 0xFF00, 0xFF60 },

		{ 0xFFE0, 0xFFE6 }, { 0x20000, 0x2FFFD }, { 0x30000, 0x3FFFD }

	};

	return bisearch(ucs, double_width, ARRAY_SIZE(double_width) - 1);

	if (ucs < double_width[0].first ||

	    ucs > double_width[ARRAY_SIZE(double_width) - 1].last)

		return 0;



	return bsearch(&ucs, double_width, ARRAY_SIZE(double_width),

			sizeof(struct interval), ucs_cmp) != NULL;

}



static void con_flush(struct vc_data *vc, unsigned long draw_from,