[apple/xnu.git] / bsd / hfs / hfs_encodings.c

/*
 * Copyright (c) 2000-2002 Apple Computer, Inc. All rights reserved.
 *
 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
 * 
 * This file contains Original Code and/or Modifications of Original Code
 * as defined in and that are subject to the Apple Public Source License
 * Version 2.0 (the 'License'). You may not use this file except in
 * compliance with the License. The rights granted to you under the License
 * may not be used to create, or enable the creation or redistribution of,
 * unlawful or unlicensed copies of an Apple operating system, or to
 * circumvent, violate, or enable the circumvention or violation of, any
 * terms of an Apple operating system software license agreement.
 * 
 * Please obtain a copy of the License at
 * http://www.opensource.apple.com/apsl/ and read it before using this file.
 * 
 * The Original Code and all software distributed under the License are
 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
 * Please see the License for the specific language governing rights and
 * limitations under the License.
 * 
 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
 */

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/malloc.h>
#include <sys/queue.h>
#include <sys/utfconv.h>

#include "hfs.h"


lck_grp_t * encodinglst_lck_grp;
lck_grp_attr_t * encodinglst_lck_grp_attr;
lck_attr_t * encodinglst_lck_attr;


/* hfs encoding converter list */
SLIST_HEAD(encodinglst, hfs_encoding) hfs_encoding_list = {0};

lck_mtx_t  encodinglst_mutex;


/* hfs encoding converter entry */
struct	hfs_encoding {
	SLIST_ENTRY(hfs_encoding)  link;
	int			refcount;
	int			kmod_id;
	UInt32			encoding;
	hfs_to_unicode_func_t	get_unicode_func;
	unicode_to_hfs_func_t	get_hfsname_func;
};

/* XXX We should use an "official" interface! */
extern kern_return_t kmod_destroy(host_priv_t host_priv, kmod_t id);
extern struct host realhost;

#define MAX_HFS_UNICODE_CHARS	(15*5)

int mac_roman_to_unicode(const Str31 hfs_str, UniChar *uni_str, UInt32 maxCharLen, UInt32 *usedCharLen);

static int unicode_to_mac_roman(UniChar *uni_str, UInt32 unicodeChars, Str31 hfs_str);


void
hfs_converterinit(void)
{
	SLIST_INIT(&hfs_encoding_list);

	encodinglst_lck_grp_attr= lck_grp_attr_alloc_init();
	encodinglst_lck_grp  = lck_grp_alloc_init("cnode_hash", encodinglst_lck_grp_attr);
	encodinglst_lck_attr = lck_attr_alloc_init();

	lck_mtx_init(&encodinglst_mutex, encodinglst_lck_grp, encodinglst_lck_attr);

	/*
	 * add resident MacRoman converter and take a reference
	 * since its always "loaded".
	 */
	hfs_addconverter(0, kTextEncodingMacRoman, mac_roman_to_unicode, unicode_to_mac_roman);
	SLIST_FIRST(&hfs_encoding_list)->refcount++;
}


/*
 * hfs_addconverter - add an HFS encoding converter
 *
 * This is called exclusivly by kernel loadable modules
 * (like HFS_Japanese.kmod) to register hfs encoding
 * conversion routines.
 *
 */
int
hfs_addconverter(int id, UInt32 encoding, hfs_to_unicode_func_t get_unicode, unicode_to_hfs_func_t get_hfsname)
{
	struct hfs_encoding *encp;
	
	MALLOC(encp, struct hfs_encoding *, sizeof(struct hfs_encoding), M_TEMP, M_WAITOK);

	lck_mtx_lock(&encodinglst_mutex);

	encp->link.sle_next = NULL;
	encp->refcount = 0;
	encp->encoding = encoding;
	encp->get_unicode_func = get_unicode;
	encp->get_hfsname_func = get_hfsname;
	encp->kmod_id = id;
	SLIST_INSERT_HEAD(&hfs_encoding_list, encp, link);

	lck_mtx_unlock(&encodinglst_mutex);
	return (0);
}


/*
 * hfs_remconverter - remove an HFS encoding converter
 *
 * Can be called by a kernel loadable module's finalize
 * routine to remove an encoding converter so that the
 * module (i.e. the code) can be unloaded.
 *
 * However, in the normal case, the removing and unloading
 * of these converters is done in hfs_relconverter.
 * The call is initiated from within the kernel during the unmounting of an hfs voulume.
 */
int
hfs_remconverter(int id, UInt32 encoding)
{
	struct hfs_encoding *encp;

	lck_mtx_lock(&encodinglst_mutex);
	SLIST_FOREACH(encp, &hfs_encoding_list, link) {
		if (encp->encoding == encoding && encp->kmod_id == id) {
			encp->refcount--;
			
			/* if converter is no longer in use, release it */
			if (encp->refcount <= 0 && encp->kmod_id != 0) {
				SLIST_REMOVE(&hfs_encoding_list, encp, hfs_encoding, link);
				lck_mtx_unlock(&encodinglst_mutex);
    				FREE(encp, M_TEMP);
    				return (0);
 			} else {
 				lck_mtx_unlock(&encodinglst_mutex);
				return (1);   /* busy */
			}
			break;
		}
	}
	lck_mtx_unlock(&encodinglst_mutex);

	return (0);
}


/*
 * hfs_getconverter - get HFS encoding converters
 *
 * Normally called during the mounting of an hfs voulume.
 */
int
hfs_getconverter(UInt32 encoding, hfs_to_unicode_func_t *get_unicode, unicode_to_hfs_func_t *get_hfsname)
{
	struct hfs_encoding *encp;
	int found = 0;

	lck_mtx_lock(&encodinglst_mutex);
	SLIST_FOREACH(encp, &hfs_encoding_list, link) {
		if (encp->encoding == encoding) {
			found = 1;
			*get_unicode = encp->get_unicode_func;
			*get_hfsname = encp->get_hfsname_func;
			++encp->refcount;
			break;
		}
	}
	lck_mtx_unlock(&encodinglst_mutex);

	if (!found) {
		*get_unicode = NULL;
		*get_hfsname = NULL;
		return (EINVAL);
	}
	
	return (0);
}


/*
 * hfs_relconverter - release interest in an HFS encoding converter
 *
 * Normally called during the unmounting of an hfs voulume.
 */
int
hfs_relconverter(UInt32 encoding)
{
	struct hfs_encoding *encp;

	lck_mtx_lock(&encodinglst_mutex);
	SLIST_FOREACH(encp, &hfs_encoding_list, link) {
		if (encp->encoding == encoding) {
			encp->refcount--;
			
			/* if converter is no longer in use, release it */
			if (encp->refcount <= 0 && encp->kmod_id != 0) {
				int id = encp->kmod_id;

				SLIST_REMOVE(&hfs_encoding_list, encp, hfs_encoding, link);
				lck_mtx_unlock(&encodinglst_mutex);
 
 				FREE(encp, M_TEMP);
   				kmod_destroy((host_priv_t) host_priv_self(), id);
				return (0);
			}
			lck_mtx_unlock(&encodinglst_mutex);
			return (0);
		}
	}
	lck_mtx_unlock(&encodinglst_mutex);

	return (EINVAL);
}


/*
 * Convert HFS encoded string into UTF-8
 *
 * Unicode output is fully decomposed
 * '/' chars are converted to ':'
 */
int
hfs_to_utf8(ExtendedVCB *vcb, Str31 hfs_str, ByteCount maxDstLen, ByteCount *actualDstLen, unsigned char* dstStr)
{
	int error;
	UniChar uniStr[MAX_HFS_UNICODE_CHARS];
	ItemCount uniCount;
	size_t utf8len;
	hfs_to_unicode_func_t hfs_get_unicode = VCBTOHFS(vcb)->hfs_get_unicode;

	error = hfs_get_unicode(hfs_str, uniStr, MAX_HFS_UNICODE_CHARS, &uniCount);
	
	if (uniCount == 0)
		error = EINVAL;

	if (error == 0) {
		error = utf8_encodestr(uniStr, uniCount * sizeof(UniChar), dstStr, &utf8len, maxDstLen , ':', 0);
		if (error == ENAMETOOLONG)
			*actualDstLen = utf8_encodelen(uniStr, uniCount * sizeof(UniChar), ':', 0);
		else
			*actualDstLen = utf8len;
	}

	return error;
}


/*
 * When an HFS name cannot be encoded with the current
 * volume encoding then MacRoman is used as a fallback.
 */
int
mac_roman_to_utf8(Str31 hfs_str, ByteCount maxDstLen, ByteCount *actualDstLen, unsigned char* dstStr)
{
	int error;
	UniChar uniStr[MAX_HFS_UNICODE_CHARS];
	ItemCount uniCount;
	size_t utf8len;

	error = mac_roman_to_unicode(hfs_str, uniStr, MAX_HFS_UNICODE_CHARS, &uniCount);
	
	if (uniCount == 0)
		error = EINVAL;

	if (error == 0) {
		error = utf8_encodestr(uniStr, uniCount * sizeof(UniChar), dstStr, &utf8len, maxDstLen , ':', 0);
		if (error == ENAMETOOLONG)
			*actualDstLen = utf8_encodelen(uniStr, uniCount * sizeof(UniChar), ':', 0);
		else
			*actualDstLen = utf8len;
	}

	return error;
}


/*
 * Convert Unicode string into HFS encoding
 *
 * ':' chars are converted to '/'
 * Assumes input represents fully decomposed Unicode
 */
int
unicode_to_hfs(ExtendedVCB *vcb, ByteCount srcLen, u_int16_t* srcStr, Str31 dstStr, int retry)
{
	int error;
	unicode_to_hfs_func_t hfs_get_hfsname = VCBTOHFS(vcb)->hfs_get_hfsname;

	error = hfs_get_hfsname(srcStr, srcLen/sizeof(UniChar), dstStr);
	if (error && retry) {
		error = unicode_to_mac_roman(srcStr, srcLen/sizeof(UniChar), dstStr);
	}
	return error;
}

/*
 * Convert UTF-8 string into HFS encoding
 *
 * ':' chars are converted to '/'
 * Assumes input represents fully decomposed Unicode
 */
int
utf8_to_hfs(ExtendedVCB *vcb, ByteCount srcLen, const unsigned char* srcStr, Str31 dstStr/*, int retry*/)
{
	int error;
	UniChar uniStr[MAX_HFS_UNICODE_CHARS];
	size_t ucslen;

	error = utf8_decodestr(srcStr, srcLen, uniStr, &ucslen, sizeof(uniStr), ':', 0);
	if (error == 0)
		error = unicode_to_hfs(vcb, ucslen, uniStr, dstStr, 1);

	return error;
}

int
utf8_to_mac_roman(ByteCount srcLen, const unsigned char* srcStr, Str31 dstStr)
{
	int error;
	UniChar uniStr[MAX_HFS_UNICODE_CHARS];
	size_t ucslen;

	error = utf8_decodestr(srcStr, srcLen, uniStr, &ucslen, sizeof(uniStr), ':', 0);
	if (error == 0)
		error = unicode_to_mac_roman(uniStr, ucslen/sizeof(UniChar), dstStr);

	return error;
}

/*
 * HFS MacRoman to/from Unicode conversions are built into the kernel
 * All others hfs encodings are loadable.
 */

/* 0x00A0 - 0x00FF = Latin 1 Supplement (30 total) */
static UInt8 gLatin1Table[] = {
  /*		  0     1     2     3     4     5     6     7     8     9     A     B     C     D     E     F  */
  /* 0x00A0 */	0xCA, 0xC1, 0xA2, 0xA3, 0xDB, 0xB4,  '?', 0xA4, 0xAC, 0xA9, 0xBB, 0xC7, 0xC2,  '?', 0xA8, 0xF8,
  /* 0x00B0 */	0xA1, 0XB1,  '?',  '?', 0xAB, 0xB5, 0xA6, 0xe1, 0xFC,  '?', 0xBC, 0xC8,  '?',  '?',  '?', 0xC0,
  /* 0x00C0 */	 '?',  '?',  '?',  '?',  '?',  '?', 0xAE,  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',
  /* 0x00D0 */	 '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?', 0xAF,  '?',  '?',  '?',  '?',  '?',  '?', 0xA7,
  /* 0x00E0 */	 '?',  '?',  '?',  '?',  '?',  '?', 0xBE,  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',
  /* 0x00F0 */	 '?',  '?',  '?',  '?',  '?',  '?',  '?', 0xD6, 0xBF,  '?',  '?',  '?',  '?',  '?',  '?',  '?'
};

/* 0x02C0 - 0x02DF = Spacing Modifiers (8 total) */
static UInt8 gSpaceModsTable[] = {
  /*		  0     1     2     3     4     5     6     7     8     9     A     B     C     D     E     F  */
  /* 0x02C0 */	 '?',  '?',  '?',  '?',  '?',  '?', 0xF6, 0xFF,  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',
  /* 0x02D0 */	 '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?', 0xF9, 0xFA, 0xFB, 0xFE, 0xF7, 0xFD,  '?',  '?'
};

/* 0x2010 - 0x20AF = General Punctuation (17 total) */
static UInt8 gPunctTable[] = {
  /*		  0     1     2     3     4     5     6     7     8     9     A     B     C     D     E     F  */
  /* 0x2010 */	 '?',  '?',  '?', 0xd0, 0xd1,  '?',  '?',  '?', 0xd4, 0xd5, 0xe2,  '?', 0xd2, 0xd3, 0xe3,  '?',
  /* 0x2020 */	0xa0, 0xe0, 0xa5,  '?',  '?',  '?', 0xc9,  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',
  /* 0x2030 */	0xe4,  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?', 0xdc, 0xdd,  '?',  '?',  '?',  '?',  '?',
  /* 0x2040 */	 '?',  '?',  '?',  '?', 0xda,  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',
  /* 0x2050 */	 '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',
  /* 0x2060 */	 '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',
  /* 0x2070 */	 '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',
  /* 0x2080 */	 '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',
  /* 0x2090 */	 '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',
  /* 0x20A0 */	 '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?', 0xdb,  '?',  '?',  '?'
};

/* 0x22xx = Mathematical Operators (11 total) */
static UInt8 gMathTable[] = {
  /*		  0     1     2     3     4     5     6     7     8     9     A     B     C     D     E     F  */
  /* 0x2200 */	 '?',  '?', 0xb6,  '?',  '?',  '?', 0xc6,  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?', 0xb8,
  /* 0x2210 */	 '?', 0xb7,  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?', 0xc3,  '?',  '?',  '?', 0xb0,  '?',
  /* 0x2220 */	 '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?', 0xba,  '?',  '?',  '?',  '?',
  /* 0x2230 */	 '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',
  /* 0x2240 */	 '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?', 0xc5,  '?',  '?',  '?',  '?',  '?',  '?',  '?',
  /* 0x2250 */	 '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',
  /* 0x2260 */	0xad,  '?',  '?',  '?', 0xb2, 0xb3,  '?',  '?'
};

/* */
static UInt8 gReverseCombTable[] = {
  /*		  0     1     2     3     4     5     6     7     8     9     A     B     C     D     E     F  */
  /* 0x40 */	0xDA, 0x40, 0xDA, 0xDA, 0xDA, 0x56, 0xDA, 0xDA, 0xDA, 0x6C, 0xDA, 0xDA, 0xDA, 0xDA, 0x82, 0x98,
  /* 0x50 */	0xDA, 0xDA, 0xDA, 0xDA, 0xDA, 0xAE, 0xDA, 0xDA, 0xDA, 0xC4, 0xDA, 0xDA, 0xDA, 0xDA, 0xDA, 0xDA,
  /* 0x60 */	0xDA, 0x4B, 0xDA, 0xDA, 0xDA, 0x61, 0xDA, 0xDA, 0xDA, 0x77, 0xDA, 0xDA, 0xDA, 0xDA, 0x8D, 0xA3,
  /* 0x70 */	0xDA, 0xDA, 0xDA, 0xDA, 0xDA, 0xB9, 0xDA, 0xDA, 0xDA, 0xCF, 0xDA, 0xDA, 0xDA, 0xDA, 0xDA, 0xDA,

  /* Combining Diacritical Marks (0x0300 - 0x030A) */
  /*              0     1     2     3     4     5     6     7     8     9     A  */
  /*  'A'   */
  /* 0x0300 */	0xCB, 0xE7, 0xE5, 0xCC,  '?',  '?',  '?',  '?', 0x80,  '?', 0x81,

  /*  'a'   */
  /* 0x0300 */	0x88, 0x87, 0x89, 0x8B,  '?',  '?',  '?',  '?', 0x8A,  '?', 0x8C,

  /*  'E'   */
  /* 0x0300 */	0xE9, 0x83, 0xE6,  '?',  '?',  '?',  '?',  '?', 0xE8,  '?',  '?',

  /*  'e'   */
  /* 0x0300 */	0x8F, 0x8E, 0x90,  '?',  '?',  '?',  '?',  '?', 0x91,  '?',  '?',

  /*  'I'   */
  /* 0x0300 */	0xED, 0xEA, 0xEB,  '?',  '?',  '?',  '?',  '?', 0xEC,  '?',  '?',

  /*  'i'   */
  /* 0x0300 */	0x93, 0x92, 0x94,  '?',  '?',  '?',  '?',  '?', 0x95,  '?',  '?',

  /*  'N'   */
  /* 0x0300 */	 '?',  '?',  '?', 0x84,  '?',  '?',  '?',  '?',  '?',  '?',  '?',

  /*  'n'   */
  /* 0x0300 */	 '?',  '?',  '?', 0x96,  '?',  '?',  '?',  '?',  '?',  '?',  '?',

  /*  'O'   */
  /* 0x0300 */	0xF1, 0xEE, 0xEF, 0xCD,  '?',  '?',  '?',  '?', 0x85,  '?',  '?',

  /*  'o'   */
  /* 0x0300 */	0x98, 0x97, 0x99, 0x9B,  '?',  '?',  '?',  '?', 0x9A,  '?',  '?',

  /*  'U'   */
  /* 0x0300 */	0xF4, 0xF2, 0xF3,  '?',  '?',  '?',  '?',  '?', 0x86,  '?',  '?',

  /*  'u'   */
  /* 0x0300 */	0x9D, 0x9C, 0x9E,  '?',  '?',  '?',  '?',  '?', 0x9F,  '?',  '?',

  /*  'Y'   */
  /* 0x0300 */	 '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?', 0xD9,  '?',  '?',

  /*  'y'   */
  /* 0x0300 */	 '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?', 0xD8,  '?',  '?',

  /*  else  */
  /* 0x0300 */	 '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?',  '?'
};


/*
 * Convert Unicode string into HFS MacRoman encoding
 *
 * Assumes Unicode input is fully decomposed
 */
static int unicode_to_mac_roman(UniChar *uni_str, UInt32 unicodeChars, Str31 hfs_str)
{
	UInt8		*p;
	const UniChar	*u;
	UniChar		c;
	UniChar		mask;
	UInt16		inputChars;
	UInt16		pascalChars;
	OSErr		result = noErr;
	UInt8		lsb;
	UInt8		prevChar;
	UInt8		mc;

	mask = (UniChar) 0xFF80;
	p = &hfs_str[1];
	u = uni_str;
	inputChars = unicodeChars;
	pascalChars = prevChar = 0;
	
	while (inputChars) {
		c = *(u++);
		lsb = (UInt8) c;

		/*
		 * If its not 7-bit ascii, then we need to map it
		 */
		if ( c & mask ) {
			mc = '?';
			switch (c & 0xFF00) {
			case 0x0000:
				if (lsb >= 0xA0)
					mc = gLatin1Table[lsb - 0xA0];
				break;

			case 0x0200:
				if (lsb >= 0xC0 && lsb <= 0xDF)
					mc = gSpaceModsTable[lsb - 0xC0];
				break;

			case 0x2000:
				if (lsb >= 0x10 && lsb <= 0xAF)
					mc = gPunctTable[lsb- 0x10];
				break;

			case 0x2200:
				if (lsb <= 0x68)
					mc = gMathTable[lsb];
				break;

			case 0x0300:
				if (c <= 0x030A) {
					if (prevChar >= 'A' && prevChar < 'z') {
						mc = gReverseCombTable[gReverseCombTable[prevChar - 0x40] + lsb];
						--p;	/* backup over base char */
						--pascalChars;
					}
				} else {
					switch (c) {
					case 0x0327:	/* combining cedilla */
						if (prevChar == 'C')
							mc = 0x82;
						else if (prevChar == 'c')
							mc = 0x8D;
						else
							break;
						--p;	/* backup over base char */
						--pascalChars;
						break;

					case 0x03A9: mc = 0xBD; break;	/* omega */

					case 0x03C0: mc = 0xB9; break;	/* pi */
					}
				}
				break;
				
			default:
				switch (c) {
				case 0x0131: mc = 0xf5; break;	/* dotless i */

				case 0x0152: mc = 0xce; break;	/* OE */

				case 0x0153: mc = 0xcf; break;	/* oe */
Commit	Line	Data
1c79356b	1	/*
5d5c5d0d A	2	* Copyright (c) 2000-2002 Apple Computer, Inc. All rights reserved.
5d5c5d0d A	3	*
8f6c56a5	4	* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
1c79356b	5	*
8f6c56a5 A	6	* This file contains Original Code and/or Modifications of Original Code
	7	* as defined in and that are subject to the Apple Public Source License
	8	* Version 2.0 (the 'License'). You may not use this file except in
	9	* compliance with the License. The rights granted to you under the License
	10	* may not be used to create, or enable the creation or redistribution of,
	11	* unlawful or unlicensed copies of an Apple operating system, or to
	12	* circumvent, violate, or enable the circumvention or violation of, any
	13	* terms of an Apple operating system software license agreement.
	14	*
	15	* Please obtain a copy of the License at
	16	* http://www.opensource.apple.com/apsl/ and read it before using this file.
	17	*
	18	* The Original Code and all software distributed under the License are
	19	* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
	20	* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
	21	* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
	22	* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
	23	* Please see the License for the specific language governing rights and
8ad349bb	24	* limitations under the License.
8f6c56a5 A	25	*
8f6c56a5 A	26	* @APPLE_OSREFERENCE_LICENSE_HEADER_END@
1c79356b A	27	*/
	28
	29	#include <sys/param.h>
	30	#include <sys/systm.h>
	31	#include <sys/kernel.h>
1c79356b A	32	#include <sys/malloc.h>
	33	#include <sys/queue.h>
	34	#include <sys/utfconv.h>
	35
	36	#include "hfs.h"
	37
	38
91447636 A	39	lck_grp_t * encodinglst_lck_grp;
	40	lck_grp_attr_t * encodinglst_lck_grp_attr;
	41	lck_attr_t * encodinglst_lck_attr;
	42
	43
1c79356b A	44	/* hfs encoding converter list */
1c79356b A	45	SLIST_HEAD(encodinglst, hfs_encoding) hfs_encoding_list = {0};
91447636 A	46
	47	lck_mtx_t encodinglst_mutex;
	48
1c79356b A	49
	50
	51	/* hfs encoding converter entry */
	52	struct hfs_encoding {
	53	SLIST_ENTRY(hfs_encoding) link;
	54	int refcount;
	55	int kmod_id;
	56	UInt32 encoding;
	57	hfs_to_unicode_func_t get_unicode_func;
	58	unicode_to_hfs_func_t get_hfsname_func;
	59	};
	60
	61	/* XXX We should use an "official" interface! */
	62	extern kern_return_t kmod_destroy(host_priv_t host_priv, kmod_t id);
	63	extern struct host realhost;
	64
	65	#define MAX_HFS_UNICODE_CHARS (15*5)
	66
55e303ae	67	int mac_roman_to_unicode(const Str31 hfs_str, UniChar uni_str, UInt32 maxCharLen, UInt32 usedCharLen);
1c79356b A	68
	69	static int unicode_to_mac_roman(UniChar *uni_str, UInt32 unicodeChars, Str31 hfs_str);
	70
	71
	72	void
	73	hfs_converterinit(void)
	74	{
	75	SLIST_INIT(&hfs_encoding_list);
91447636 A	76
91447636 A	77	encodinglst_lck_grp_attr= lck_grp_attr_alloc_init();
91447636	78	encodinglst_lck_grp = lck_grp_alloc_init("cnode_hash", encodinglst_lck_grp_attr);
91447636	79	encodinglst_lck_attr = lck_attr_alloc_init();
91447636 A	80
91447636 A	81	lck_mtx_init(&encodinglst_mutex, encodinglst_lck_grp, encodinglst_lck_attr);
1c79356b A	82
	83	/*
	84	* add resident MacRoman converter and take a reference
	85	* since its always "loaded".
	86	*/
	87	hfs_addconverter(0, kTextEncodingMacRoman, mac_roman_to_unicode, unicode_to_mac_roman);
	88	SLIST_FIRST(&hfs_encoding_list)->refcount++;
	89	}
	90
	91
	92	/*
	93	* hfs_addconverter - add an HFS encoding converter
	94	*
	95	* This is called exclusivly by kernel loadable modules
	96	* (like HFS_Japanese.kmod) to register hfs encoding
	97	* conversion routines.
	98	*
	99	*/
	100	int
	101	hfs_addconverter(int id, UInt32 encoding, hfs_to_unicode_func_t get_unicode, unicode_to_hfs_func_t get_hfsname)
	102	{
	103	struct hfs_encoding *encp;
	104
	105	MALLOC(encp, struct hfs_encoding *, sizeof(struct hfs_encoding), M_TEMP, M_WAITOK);
	106
91447636	107	lck_mtx_lock(&encodinglst_mutex);
1c79356b A	108
	109	encp->link.sle_next = NULL;
	110	encp->refcount = 0;
	111	encp->encoding = encoding;
	112	encp->get_unicode_func = get_unicode;
	113	encp->get_hfsname_func = get_hfsname;
	114	encp->kmod_id = id;
	115	SLIST_INSERT_HEAD(&hfs_encoding_list, encp, link);
	116
91447636	117	lck_mtx_unlock(&encodinglst_mutex);
1c79356b A	118	return (0);
	119	}
	120
	121
	122	/*
	123	* hfs_remconverter - remove an HFS encoding converter
	124	*
	125	* Can be called by a kernel loadable module's finalize
	126	* routine to remove an encoding converter so that the
	127	* module (i.e. the code) can be unloaded.
	128	*
	129	* However, in the normal case, the removing and unloading
	130	* of these converters is done in hfs_relconverter.
	131	* The call is initiated from within the kernel during the unmounting of an hfs voulume.
	132	*/
	133	int
	134	hfs_remconverter(int id, UInt32 encoding)
	135	{
	136	struct hfs_encoding *encp;
1c79356b	137
91447636	138	lck_mtx_lock(&encodinglst_mutex);
1c79356b A	139	SLIST_FOREACH(encp, &hfs_encoding_list, link) {
	140	if (encp->encoding == encoding && encp->kmod_id == id) {
	141	encp->refcount--;
	142
	143	/* if converter is no longer in use, release it */
	144	if (encp->refcount <= 0 && encp->kmod_id != 0) {
	145	SLIST_REMOVE(&hfs_encoding_list, encp, hfs_encoding, link);
91447636	146	lck_mtx_unlock(&encodinglst_mutex);
1c79356b	147	FREE(encp, M_TEMP);
91447636	148	return (0);
1c79356b	149	} else {
91447636 A	150	lck_mtx_unlock(&encodinglst_mutex);
91447636 A	151	return (1); /* busy */
1c79356b A	152	}
	153	break;
	154	}
	155	}
91447636	156	lck_mtx_unlock(&encodinglst_mutex);
1c79356b	157
91447636	158	return (0);
1c79356b A	159	}
	160
	161
	162	/*
	163	* hfs_getconverter - get HFS encoding converters
	164	*
	165	* Normally called during the mounting of an hfs voulume.
	166	*/
	167	int
	168	hfs_getconverter(UInt32 encoding, hfs_to_unicode_func_t get_unicode, unicode_to_hfs_func_t get_hfsname)
	169	{
	170	struct hfs_encoding *encp;
	171	int found = 0;
	172
91447636	173	lck_mtx_lock(&encodinglst_mutex);
1c79356b A	174	SLIST_FOREACH(encp, &hfs_encoding_list, link) {
	175	if (encp->encoding == encoding) {
	176	found = 1;
	177	*get_unicode = encp->get_unicode_func;
	178	*get_hfsname = encp->get_hfsname_func;
	179	++encp->refcount;
	180	break;
	181	}
	182	}
91447636	183	lck_mtx_unlock(&encodinglst_mutex);
1c79356b A	184
	185	if (!found) {
	186	*get_unicode = NULL;
	187	*get_hfsname = NULL;
	188	return (EINVAL);
	189	}
	190
	191	return (0);
	192	}
	193
	194
	195	/*
	196	* hfs_relconverter - release interest in an HFS encoding converter
	197	*
	198	* Normally called during the unmounting of an hfs voulume.
	199	*/
	200	int
	201	hfs_relconverter(UInt32 encoding)
	202	{
	203	struct hfs_encoding *encp;
1c79356b	204
91447636	205	lck_mtx_lock(&encodinglst_mutex);
1c79356b A	206	SLIST_FOREACH(encp, &hfs_encoding_list, link) {
1c79356b A	207	if (encp->encoding == encoding) {
1c79356b A	208	encp->refcount--;
	209
	210	/* if converter is no longer in use, release it */
	211	if (encp->refcount <= 0 && encp->kmod_id != 0) {
	212	int id = encp->kmod_id;
	213
	214	SLIST_REMOVE(&hfs_encoding_list, encp, hfs_encoding, link);
91447636 A	215	lck_mtx_unlock(&encodinglst_mutex);
	216
	217	FREE(encp, M_TEMP);
	218	kmod_destroy((host_priv_t) host_priv_self(), id);
	219	return (0);
1c79356b	220	}
91447636 A	221	lck_mtx_unlock(&encodinglst_mutex);
91447636 A	222	return (0);
1c79356b A	223	}
1c79356b A	224	}
91447636	225	lck_mtx_unlock(&encodinglst_mutex);
1c79356b	226
91447636	227	return (EINVAL);
1c79356b A	228	}
	229
	230
	231	/*
	232	* Convert HFS encoded string into UTF-8
	233	*
	234	* Unicode output is fully decomposed
	235	* '/' chars are converted to ':'
	236	*/
	237	int
	238	hfs_to_utf8(ExtendedVCB vcb, Str31 hfs_str, ByteCount maxDstLen, ByteCount actualDstLen, unsigned char* dstStr)
	239	{
	240	int error;
	241	UniChar uniStr[MAX_HFS_UNICODE_CHARS];
	242	ItemCount uniCount;
	243	size_t utf8len;
	244	hfs_to_unicode_func_t hfs_get_unicode = VCBTOHFS(vcb)->hfs_get_unicode;
	245
	246	error = hfs_get_unicode(hfs_str, uniStr, MAX_HFS_UNICODE_CHARS, &uniCount);
	247
	248	if (uniCount == 0)
	249	error = EINVAL;
	250
	251	if (error == 0) {
	252	error = utf8_encodestr(uniStr, uniCount * sizeof(UniChar), dstStr, &utf8len, maxDstLen , ':', 0);
	253	if (error == ENAMETOOLONG)
	254	actualDstLen = utf8_encodelen(uniStr, uniCount sizeof(UniChar), ':', 0);
	255	else
	256	*actualDstLen = utf8len;
	257	}
	258
	259	return error;
	260	}
	261
	262
	263	/*
	264	* When an HFS name cannot be encoded with the current
	265	* volume encoding then MacRoman is used as a fallback.
	266	*/
	267	int
	268	mac_roman_to_utf8(Str31 hfs_str, ByteCount maxDstLen, ByteCount actualDstLen, unsigned char dstStr)
	269	{
	270	int error;
	271	UniChar uniStr[MAX_HFS_UNICODE_CHARS];
	272	ItemCount uniCount;
	273	size_t utf8len;
	274
	275	error = mac_roman_to_unicode(hfs_str, uniStr, MAX_HFS_UNICODE_CHARS, &uniCount);
	276
	277	if (uniCount == 0)
	278	error = EINVAL;
	279
	280	if (error == 0) {
	281	error = utf8_encodestr(uniStr, uniCount * sizeof(UniChar), dstStr, &utf8len, maxDstLen , ':', 0);
	282	if (error == ENAMETOOLONG)
	283	actualDstLen = utf8_encodelen(uniStr, uniCount sizeof(UniChar), ':', 0);
	284	else
	285	*actualDstLen = utf8len;
	286	}
	287
	288	return error;
	289	}
	290
	291
9bccf70c A	292	/*
	293	* Convert Unicode string into HFS encoding
	294	*
	295	* ':' chars are converted to '/'
	296	* Assumes input represents fully decomposed Unicode
	297	*/
	298	int
	299	unicode_to_hfs(ExtendedVCB vcb, ByteCount srcLen, u_int16_t srcStr, Str31 dstStr, int retry)
	300	{
	301	int error;
	302	unicode_to_hfs_func_t hfs_get_hfsname = VCBTOHFS(vcb)->hfs_get_hfsname;
	303
	304	error = hfs_get_hfsname(srcStr, srcLen/sizeof(UniChar), dstStr);
	305	if (error && retry) {
	306	error = unicode_to_mac_roman(srcStr, srcLen/sizeof(UniChar), dstStr);
	307	}
	308	return error;
	309	}
	310
1c79356b A	311	/*
	312	* Convert UTF-8 string into HFS encoding
	313	*
	314	* ':' chars are converted to '/'
	315	* Assumes input represents fully decomposed Unicode
	316	*/
	317	int
9bccf70c	318	utf8_to_hfs(ExtendedVCB vcb, ByteCount srcLen, const unsigned char srcStr, Str31 dstStr/, int retry/)
1c79356b A	319	{
	320	int error;
	321	UniChar uniStr[MAX_HFS_UNICODE_CHARS];
	322	size_t ucslen;
1c79356b A	323
	324	error = utf8_decodestr(srcStr, srcLen, uniStr, &ucslen, sizeof(uniStr), ':', 0);
	325	if (error == 0)
9bccf70c	326	error = unicode_to_hfs(vcb, ucslen, uniStr, dstStr, 1);
1c79356b A	327
	328	return error;
	329	}
	330
	331	int
	332	utf8_to_mac_roman(ByteCount srcLen, const unsigned char* srcStr, Str31 dstStr)
	333	{
	334	int error;
	335	UniChar uniStr[MAX_HFS_UNICODE_CHARS];
	336	size_t ucslen;
	337
	338	error = utf8_decodestr(srcStr, srcLen, uniStr, &ucslen, sizeof(uniStr), ':', 0);
	339	if (error == 0)
	340	error = unicode_to_mac_roman(uniStr, ucslen/sizeof(UniChar), dstStr);
	341
	342	return error;
	343	}
	344
	345	/*
	346	* HFS MacRoman to/from Unicode conversions are built into the kernel
	347	* All others hfs encodings are loadable.
	348	*/
	349
	350	/* 0x00A0 - 0x00FF = Latin 1 Supplement (30 total) */
	351	static UInt8 gLatin1Table[] = {
	352	/* 0 1 2 3 4 5 6 7 8 9 A B C D E F */
	353	/* 0x00A0 */ 0xCA, 0xC1, 0xA2, 0xA3, 0xDB, 0xB4, '?', 0xA4, 0xAC, 0xA9, 0xBB, 0xC7, 0xC2, '?', 0xA8, 0xF8,
	354	/* 0x00B0 */ 0xA1, 0XB1, '?', '?', 0xAB, 0xB5, 0xA6, 0xe1, 0xFC, '?', 0xBC, 0xC8, '?', '?', '?', 0xC0,
	355	/* 0x00C0 */ '?', '?', '?', '?', '?', '?', 0xAE, '?', '?', '?', '?', '?', '?', '?', '?', '?',
	356	/* 0x00D0 */ '?', '?', '?', '?', '?', '?', '?', '?', 0xAF, '?', '?', '?', '?', '?', '?', 0xA7,
	357	/* 0x00E0 */ '?', '?', '?', '?', '?', '?', 0xBE, '?', '?', '?', '?', '?', '?', '?', '?', '?',
	358	/* 0x00F0 */ '?', '?', '?', '?', '?', '?', '?', 0xD6, 0xBF, '?', '?', '?', '?', '?', '?', '?'
	359	};
	360
	361	/* 0x02C0 - 0x02DF = Spacing Modifiers (8 total) */
	362	static UInt8 gSpaceModsTable[] = {
	363	/* 0 1 2 3 4 5 6 7 8 9 A B C D E F */
	364	/* 0x02C0 */ '?', '?', '?', '?', '?', '?', 0xF6, 0xFF, '?', '?', '?', '?', '?', '?', '?', '?',
	365	/* 0x02D0 */ '?', '?', '?', '?', '?', '?', '?', '?', 0xF9, 0xFA, 0xFB, 0xFE, 0xF7, 0xFD, '?', '?'
	366	};
	367
	368	/* 0x2010 - 0x20AF = General Punctuation (17 total) */
	369	static UInt8 gPunctTable[] = {
	370	/* 0 1 2 3 4 5 6 7 8 9 A B C D E F */
	371	/* 0x2010 */ '?', '?', '?', 0xd0, 0xd1, '?', '?', '?', 0xd4, 0xd5, 0xe2, '?', 0xd2, 0xd3, 0xe3, '?',
	372	/* 0x2020 */ 0xa0, 0xe0, 0xa5, '?', '?', '?', 0xc9, '?', '?', '?', '?', '?', '?', '?', '?', '?',
	373	/* 0x2030 */ 0xe4, '?', '?', '?', '?', '?', '?', '?', '?', 0xdc, 0xdd, '?', '?', '?', '?', '?',
	374	/* 0x2040 */ '?', '?', '?', '?', 0xda, '?', '?', '?', '?', '?', '?', '?', '?', '?', '?', '?',
	375	/* 0x2050 */ '?', '?', '?', '?', '?', '?', '?', '?', '?', '?', '?', '?', '?', '?', '?', '?',
	376	/* 0x2060 */ '?', '?', '?', '?', '?', '?', '?', '?', '?', '?', '?', '?', '?', '?', '?', '?',
	377	/* 0x2070 */ '?', '?', '?', '?', '?', '?', '?', '?', '?', '?', '?', '?', '?', '?', '?', '?',
	378	/* 0x2080 */ '?', '?', '?', '?', '?', '?', '?', '?', '?', '?', '?', '?', '?', '?', '?', '?',
	379	/* 0x2090 */ '?', '?', '?', '?', '?', '?', '?', '?', '?', '?', '?', '?', '?', '?', '?', '?',
	380	/* 0x20A0 */ '?', '?', '?', '?', '?', '?', '?', '?', '?', '?', '?', '?', 0xdb, '?', '?', '?'
	381	};
	382
	383	/* 0x22xx = Mathematical Operators (11 total) */
	384	static UInt8 gMathTable[] = {
	385	/* 0 1 2 3 4 5 6 7 8 9 A B C D E F */
	386	/* 0x2200 */ '?', '?', 0xb6, '?', '?', '?', 0xc6, '?', '?', '?', '?', '?', '?', '?', '?', 0xb8,
	387	/* 0x2210 */ '?', 0xb7, '?', '?', '?', '?', '?', '?', '?', '?', 0xc3, '?', '?', '?', 0xb0, '?',
	388	/* 0x2220 */ '?', '?', '?', '?', '?', '?', '?', '?', '?', '?', '?', 0xba, '?', '?', '?', '?',
	389	/* 0x2230 */ '?', '?', '?', '?', '?', '?', '?', '?', '?', '?', '?', '?', '?', '?', '?', '?',
	390	/* 0x2240 */ '?', '?', '?', '?', '?', '?', '?', '?', 0xc5, '?', '?', '?', '?', '?', '?', '?',
391	/* 0x2250 */ '?', '?', '?', '?', '?', '?', '?', '?', '?', '?', '?', '?', '?', '?', '?', '?',
392	/* 0x2260 */ 0xad, '?', '?', '?', 0xb2, 0xb3, '?', '?'
393	};
394
395	/* */
396	static UInt8 gReverseCombTable[] = {
397	/* 0 1 2 3 4 5 6 7 8 9 A B C D E F */
398	/* 0x40 */ 0xDA, 0x40, 0xDA, 0xDA, 0xDA, 0x56, 0xDA, 0xDA, 0xDA, 0x6C, 0xDA, 0xDA, 0xDA, 0xDA, 0x82, 0x98,
399	/* 0x50 */ 0xDA, 0xDA, 0xDA, 0xDA, 0xDA, 0xAE, 0xDA, 0xDA, 0xDA, 0xC4, 0xDA, 0xDA, 0xDA, 0xDA, 0xDA, 0xDA,
400	/* 0x60 */ 0xDA, 0x4B, 0xDA, 0xDA, 0xDA, 0x61, 0xDA, 0xDA, 0xDA, 0x77, 0xDA, 0xDA, 0xDA, 0xDA, 0x8D, 0xA3,
401	/* 0x70 */ 0xDA, 0xDA, 0xDA, 0xDA, 0xDA, 0xB9, 0xDA, 0xDA, 0xDA, 0xCF, 0xDA, 0xDA, 0xDA, 0xDA, 0xDA, 0xDA,
402
403	/* Combining Diacritical Marks (0x0300 - 0x030A) */
404	/* 0 1 2 3 4 5 6 7 8 9 A */
405	/* 'A' */
406	/* 0x0300 */ 0xCB, 0xE7, 0xE5, 0xCC, '?', '?', '?', '?', 0x80, '?', 0x81,
407
408	/* 'a' */
409	/* 0x0300 */ 0x88, 0x87, 0x89, 0x8B, '?', '?', '?', '?', 0x8A, '?', 0x8C,
410
411	/* 'E' */
412	/* 0x0300 */ 0xE9, 0x83, 0xE6, '?', '?', '?', '?', '?', 0xE8, '?', '?',
413
414	/* 'e' */
415	/* 0x0300 */ 0x8F, 0x8E, 0x90, '?', '?', '?', '?', '?', 0x91, '?', '?',
416
417	/* 'I' */
418	/* 0x0300 */ 0xED, 0xEA, 0xEB, '?', '?', '?', '?', '?', 0xEC, '?', '?',
419
420	/* 'i' */
421	/* 0x0300 */ 0x93, 0x92, 0x94, '?', '?', '?', '?', '?', 0x95, '?', '?',
422
423	/* 'N' */
424	/* 0x0300 */ '?', '?', '?', 0x84, '?', '?', '?', '?', '?', '?', '?',
425
426	/* 'n' */
427	/* 0x0300 */ '?', '?', '?', 0x96, '?', '?', '?', '?', '?', '?', '?',
428
429	/* 'O' */
430	/* 0x0300 */ 0xF1, 0xEE, 0xEF, 0xCD, '?', '?', '?', '?', 0x85, '?', '?',
431
432	/* 'o' */
433	/* 0x0300 */ 0x98, 0x97, 0x99, 0x9B, '?', '?', '?', '?', 0x9A, '?', '?',
434
435	/* 'U' */
436	/* 0x0300 */ 0xF4, 0xF2, 0xF3, '?', '?', '?', '?', '?', 0x86, '?', '?',
437
438	/* 'u' */
439	/* 0x0300 */ 0x9D, 0x9C, 0x9E, '?', '?', '?', '?', '?', 0x9F, '?', '?',
440
441	/* 'Y' */
442	/* 0x0300 */ '?', '?', '?', '?', '?', '?', '?', '?', 0xD9, '?', '?',
443
444	/* 'y' */
445	/* 0x0300 */ '?', '?', '?', '?', '?', '?', '?', '?', 0xD8, '?', '?',
446
447	/* else */
448	/* 0x0300 */ '?', '?', '?', '?', '?', '?', '?', '?', '?', '?', '?'
449	};
450
451
452	/*
453	* Convert Unicode string into HFS MacRoman encoding
454	*
455	* Assumes Unicode input is fully decomposed
456	*/
457	static int unicode_to_mac_roman(UniChar *uni_str, UInt32 unicodeChars, Str31 hfs_str)
458	{
459	UInt8 *p;
460	const UniChar *u;
461	UniChar c;
462	UniChar mask;
463	UInt16 inputChars;
464	UInt16 pascalChars;
465	OSErr result = noErr;
466	UInt8 lsb;
467	UInt8 prevChar;
468	UInt8 mc;
469
470	mask = (UniChar) 0xFF80;
471	p = &hfs_str[1];
472	u = uni_str;
473	inputChars = unicodeChars;
474	pascalChars = prevChar = 0;
475
476	while (inputChars) {
477	c = *(u++);
478	lsb = (UInt8) c;
479
480	/*
481	* If its not 7-bit ascii, then we need to map it
482	*/
483	if ( c & mask ) {
484	mc = '?';
485	switch (c & 0xFF00) {
486	case 0x0000:
487	if (lsb >= 0xA0)
488	mc = gLatin1Table[lsb - 0xA0];
489	break;
490
491	case 0x0200:
492	if (lsb >= 0xC0 && lsb <= 0xDF)
493	mc = gSpaceModsTable[lsb - 0xC0];
494	break;
495
496	case 0x2000:
497	if (lsb >= 0x10 && lsb <= 0xAF)
498	mc = gPunctTable[lsb- 0x10];
499	break;
500
501	case 0x2200:
502	if (lsb <= 0x68)
503	mc = gMathTable[lsb];
504	break;
505
506	case 0x0300:
507	if (c <= 0x030A) {
508	if (prevChar >= 'A' && prevChar < 'z') {
509	mc = gReverseCombTable[gReverseCombTable[prevChar - 0x40] + lsb];
510	--p; /* backup over base char */
511	--pascalChars;
512	}
513	} else {
514	switch (c) {
515	case 0x0327: /* combining cedilla */
516	if (prevChar == 'C')
517	mc = 0x82;
518	else if (prevChar == 'c')
519	mc = 0x8D;
520	else
521	break;
522	--p; /* backup over base char */
523	--pascalChars;
524	break;
525
526	case 0x03A9: mc = 0xBD; break; /* omega */
527
528	case 0x03C0: mc = 0xB9; break; /* pi */
529	}
530	}
531	break;
532
533	default:
534	switch (c) {
535	case 0x0131: mc = 0xf5; break; /* dotless i */
536
537	case 0x0152: mc = 0xce; break; /* OE */
538
539	case 0x0153: mc = 0xcf; break; /* oe */
540
541