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Commit b8a41c44 authored by Jan Kara's avatar Jan Kara
Browse files

udf: Use UTF-32 <-> UTF-8 conversion functions from NLS 



Instead of implementing our own functions converting to and from UTF-8,
use the ones provided by NLS.

Signed-off-by: default avatarJan Kara <jack@suse.cz>
parent b8333ea1

fs/udf/unicode.c

+17 −63
Original line number Diff line number Diff line
@@ -28,6 +28,7 @@ 


#include "udf_sb.h"



#define UNICODE_MAX 0x10ffff

#define SURROGATE_MASK 0xfffff800

#define SURROGATE_PAIR 0x0000d800
@@ -40,22 +41,12 @@ static int udf_uni2char_utf8(wchar_t uni, 
	if (boundlen <= 0)

		return -ENAMETOOLONG;



	if ((uni & SURROGATE_MASK) == SURROGATE_PAIR)

	u_len = utf32_to_utf8(uni, out, boundlen);

	if (u_len < 0) {

		if (uni > UNICODE_MAX ||

		    (uni & SURROGATE_MASK) == SURROGATE_PAIR)

			return -EINVAL;



	if (uni < 0x80) {

		out[u_len++] = (unsigned char)uni;

	} else if (uni < 0x800) {

		if (boundlen < 2)

			return -ENAMETOOLONG;

		out[u_len++] = (unsigned char)(0xc0 | (uni >> 6));

		out[u_len++] = (unsigned char)(0x80 | (uni & 0x3f));

	} else {

		if (boundlen < 3)

		return -ENAMETOOLONG;

		out[u_len++] = (unsigned char)(0xe0 | (uni >> 12));

		out[u_len++] = (unsigned char)(0x80 | ((uni >> 6) & 0x3f));

		out[u_len++] = (unsigned char)(0x80 | (uni & 0x3f));

	}

	return u_len;

}
@@ -64,56 +55,19 @@ static int udf_char2uni_utf8(const unsigned char *in, 
			     int boundlen,

			     wchar_t *uni)

{

	unsigned int utf_char;

	unsigned char c;

	int utf_cnt, u_len;



	utf_char = 0;

	utf_cnt = 0;

	for (u_len = 0; u_len < boundlen;) {

		c = in[u_len++];



		/* Complete a multi-byte UTF-8 character */

		if (utf_cnt) {

			utf_char = (utf_char << 6) | (c & 0x3f);

			if (--utf_cnt)

				continue;

		} else {

			/* Check for a multi-byte UTF-8 character */

			if (c & 0x80) {

				/* Start a multi-byte UTF-8 character */

				if ((c & 0xe0) == 0xc0) {

					utf_char = c & 0x1f;

					utf_cnt = 1;

				} else if ((c & 0xf0) == 0xe0) {

					utf_char = c & 0x0f;

					utf_cnt = 2;

				} else if ((c & 0xf8) == 0xf0) {

					utf_char = c & 0x07;

					utf_cnt = 3;

				} else if ((c & 0xfc) == 0xf8) {

					utf_char = c & 0x03;

					utf_cnt = 4;

				} else if ((c & 0xfe) == 0xfc) {

					utf_char = c & 0x01;

					utf_cnt = 5;

				} else {

					utf_cnt = -1;

					break;

				}

				continue;

			} else {

				/* Single byte UTF-8 character (most common) */

				utf_char = c;

			}

		}

		*uni = utf_char;

		break;

	}

	if (utf_cnt) {

	int u_len;

	unicode_t c;



	u_len = utf8_to_utf32(in, boundlen, &c);

	if (u_len < 0) {

		*uni = '?';

		return -EINVAL;

	}



	if (c > MAX_WCHAR_T)

		*uni = '?';

	else

		*uni = c;

	return u_len;

}