[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();
	lck_grp_attr_setstat(encodinglst_lck_grp_attr);
	encodinglst_lck_grp  = lck_grp_alloc_init("cnode_hash", encodinglst_lck_grp_attr);

	encodinglst_lck_attr = lck_attr_alloc_init();
	//lck_attr_setdebug(encodinglst_lck_attr);

	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();
8f6c56a5	78	lck_grp_attr_setstat(encodinglst_lck_grp_attr);
91447636	79	encodinglst_lck_grp = lck_grp_alloc_init("cnode_hash", encodinglst_lck_grp_attr);
8f6c56a5	80
91447636	81	encodinglst_lck_attr = lck_attr_alloc_init();
8f6c56a5	82	//lck_attr_setdebug(encodinglst_lck_attr);
91447636 A	83
91447636 A	84	lck_mtx_init(&encodinglst_mutex, encodinglst_lck_grp, encodinglst_lck_attr);
1c79356b A	85
	86	/*
	87	* add resident MacRoman converter and take a reference
	88	* since its always "loaded".
	89	*/
	90	hfs_addconverter(0, kTextEncodingMacRoman, mac_roman_to_unicode, unicode_to_mac_roman);
	91	SLIST_FIRST(&hfs_encoding_list)->refcount++;
	92	}
	93
	94
	95	/*
	96	* hfs_addconverter - add an HFS encoding converter
	97	*
	98	* This is called exclusivly by kernel loadable modules
	99	* (like HFS_Japanese.kmod) to register hfs encoding
	100	* conversion routines.
	101	*
	102	*/
	103	int
	104	hfs_addconverter(int id, UInt32 encoding, hfs_to_unicode_func_t get_unicode, unicode_to_hfs_func_t get_hfsname)
	105	{
	106	struct hfs_encoding *encp;
	107
	108	MALLOC(encp, struct hfs_encoding *, sizeof(struct hfs_encoding), M_TEMP, M_WAITOK);
	109
91447636	110	lck_mtx_lock(&encodinglst_mutex);
1c79356b A	111
	112	encp->link.sle_next = NULL;
	113	encp->refcount = 0;
	114	encp->encoding = encoding;
	115	encp->get_unicode_func = get_unicode;
	116	encp->get_hfsname_func = get_hfsname;
	117	encp->kmod_id = id;
	118	SLIST_INSERT_HEAD(&hfs_encoding_list, encp, link);
	119
91447636	120	lck_mtx_unlock(&encodinglst_mutex);
1c79356b A	121	return (0);
	122	}
	123
	124
	125	/*
	126	* hfs_remconverter - remove an HFS encoding converter
	127	*
	128	* Can be called by a kernel loadable module's finalize
	129	* routine to remove an encoding converter so that the
	130	* module (i.e. the code) can be unloaded.
	131	*
	132	* However, in the normal case, the removing and unloading
	133	* of these converters is done in hfs_relconverter.
	134	* The call is initiated from within the kernel during the unmounting of an hfs voulume.
	135	*/
	136	int
	137	hfs_remconverter(int id, UInt32 encoding)
	138	{
	139	struct hfs_encoding *encp;
1c79356b	140
91447636	141	lck_mtx_lock(&encodinglst_mutex);
1c79356b A	142	SLIST_FOREACH(encp, &hfs_encoding_list, link) {
	143	if (encp->encoding == encoding && encp->kmod_id == id) {
	144	encp->refcount--;
	145
	146	/* if converter is no longer in use, release it */
	147	if (encp->refcount <= 0 && encp->kmod_id != 0) {
	148	SLIST_REMOVE(&hfs_encoding_list, encp, hfs_encoding, link);
91447636	149	lck_mtx_unlock(&encodinglst_mutex);
1c79356b	150	FREE(encp, M_TEMP);
91447636	151	return (0);
1c79356b	152	} else {
91447636 A	153	lck_mtx_unlock(&encodinglst_mutex);
91447636 A	154	return (1); /* busy */
1c79356b A	155	}
	156	break;
	157	}
	158	}
91447636	159	lck_mtx_unlock(&encodinglst_mutex);
1c79356b	160
91447636	161	return (0);
1c79356b A	162	}
	163
	164
	165	/*
	166	* hfs_getconverter - get HFS encoding converters
	167	*
	168	* Normally called during the mounting of an hfs voulume.
	169	*/
	170	int
	171	hfs_getconverter(UInt32 encoding, hfs_to_unicode_func_t get_unicode, unicode_to_hfs_func_t get_hfsname)
	172	{
	173	struct hfs_encoding *encp;
	174	int found = 0;
	175
91447636	176	lck_mtx_lock(&encodinglst_mutex);
1c79356b A	177	SLIST_FOREACH(encp, &hfs_encoding_list, link) {
	178	if (encp->encoding == encoding) {
	179	found = 1;
	180	*get_unicode = encp->get_unicode_func;
	181	*get_hfsname = encp->get_hfsname_func;
	182	++encp->refcount;
	183	break;
	184	}
	185	}
91447636	186	lck_mtx_unlock(&encodinglst_mutex);
1c79356b A	187
	188	if (!found) {
	189	*get_unicode = NULL;
	190	*get_hfsname = NULL;
	191	return (EINVAL);
	192	}
	193
	194	return (0);
	195	}
	196
	197
	198	/*
	199	* hfs_relconverter - release interest in an HFS encoding converter
	200	*
	201	* Normally called during the unmounting of an hfs voulume.
	202	*/
	203	int
	204	hfs_relconverter(UInt32 encoding)
	205	{
	206	struct hfs_encoding *encp;
1c79356b	207
91447636	208	lck_mtx_lock(&encodinglst_mutex);
1c79356b A	209	SLIST_FOREACH(encp, &hfs_encoding_list, link) {
1c79356b A	210	if (encp->encoding == encoding) {
1c79356b A	211	encp->refcount--;
	212
	213	/* if converter is no longer in use, release it */
	214	if (encp->refcount <= 0 && encp->kmod_id != 0) {
	215	int id = encp->kmod_id;
	216
	217	SLIST_REMOVE(&hfs_encoding_list, encp, hfs_encoding, link);
91447636 A	218	lck_mtx_unlock(&encodinglst_mutex);
	219
	220	FREE(encp, M_TEMP);
	221	kmod_destroy((host_priv_t) host_priv_self(), id);
	222	return (0);
1c79356b	223	}
91447636 A	224	lck_mtx_unlock(&encodinglst_mutex);
91447636 A	225	return (0);
1c79356b A	226	}
1c79356b A	227	}
91447636	228	lck_mtx_unlock(&encodinglst_mutex);
1c79356b	229
91447636	230	return (EINVAL);
1c79356b A	231	}
	232
	233
	234	/*
	235	* Convert HFS encoded string into UTF-8
	236	*
	237	* Unicode output is fully decomposed
	238	* '/' chars are converted to ':'
	239	*/
	240	int
	241	hfs_to_utf8(ExtendedVCB vcb, Str31 hfs_str, ByteCount maxDstLen, ByteCount actualDstLen, unsigned char* dstStr)
	242	{
	243	int error;
	244	UniChar uniStr[MAX_HFS_UNICODE_CHARS];
	245	ItemCount uniCount;
	246	size_t utf8len;
	247	hfs_to_unicode_func_t hfs_get_unicode = VCBTOHFS(vcb)->hfs_get_unicode;
	248
	249	error = hfs_get_unicode(hfs_str, uniStr, MAX_HFS_UNICODE_CHARS, &uniCount);
	250
	251	if (uniCount == 0)
	252	error = EINVAL;
	253
	254	if (error == 0) {
	255	error = utf8_encodestr(uniStr, uniCount * sizeof(UniChar), dstStr, &utf8len, maxDstLen , ':', 0);
	256	if (error == ENAMETOOLONG)
	257	actualDstLen = utf8_encodelen(uniStr, uniCount sizeof(UniChar), ':', 0);
	258	else
	259	*actualDstLen = utf8len;
	260	}
	261
	262	return error;
	263	}
	264
	265
	266	/*
	267	* When an HFS name cannot be encoded with the current
	268	* volume encoding then MacRoman is used as a fallback.
	269	*/
	270	int
	271	mac_roman_to_utf8(Str31 hfs_str, ByteCount maxDstLen, ByteCount actualDstLen, unsigned char dstStr)
	272	{
	273	int error;
	274	UniChar uniStr[MAX_HFS_UNICODE_CHARS];
	275	ItemCount uniCount;
	276	size_t utf8len;
	277
	278	error = mac_roman_to_unicode(hfs_str, uniStr, MAX_HFS_UNICODE_CHARS, &uniCount);
	279
	280	if (uniCount == 0)
	281	error = EINVAL;
	282
	283	if (error == 0) {
	284	error = utf8_encodestr(uniStr, uniCount * sizeof(UniChar), dstStr, &utf8len, maxDstLen , ':', 0);
	285	if (error == ENAMETOOLONG)
	286	actualDstLen = utf8_encodelen(uniStr, uniCount sizeof(UniChar), ':', 0);
	287	else
	288	*actualDstLen = utf8len;
	289	}
	290
	291	return error;
	292	}
	293
	294
9bccf70c A	295	/*
	296	* Convert Unicode string into HFS encoding
	297	*
	298	* ':' chars are converted to '/'
	299	* Assumes input represents fully decomposed Unicode
	300	*/
	301	int
	302	unicode_to_hfs(ExtendedVCB vcb, ByteCount srcLen, u_int16_t srcStr, Str31 dstStr, int retry)
	303	{
	304	int error;
	305	unicode_to_hfs_func_t hfs_get_hfsname = VCBTOHFS(vcb)->hfs_get_hfsname;
	306
	307	error = hfs_get_hfsname(srcStr, srcLen/sizeof(UniChar), dstStr);
	308	if (error && retry) {
	309	error = unicode_to_mac_roman(srcStr, srcLen/sizeof(UniChar), dstStr);
	310	}
	311	return error;
	312	}
	313
1c79356b A	314	/*
	315	* Convert UTF-8 string into HFS encoding
	316	*
	317	* ':' chars are converted to '/'
	318	* Assumes input represents fully decomposed Unicode
	319	*/
	320	int
9bccf70c	321	utf8_to_hfs(ExtendedVCB vcb, ByteCount srcLen, const unsigned char srcStr, Str31 dstStr/, int retry/)
1c79356b A	322	{
	323	int error;
	324	UniChar uniStr[MAX_HFS_UNICODE_CHARS];
	325	size_t ucslen;
1c79356b A	326
	327	error = utf8_decodestr(srcStr, srcLen, uniStr, &ucslen, sizeof(uniStr), ':', 0);
	328	if (error == 0)
9bccf70c	329	error = unicode_to_hfs(vcb, ucslen, uniStr, dstStr, 1);
1c79356b A	330
	331	return error;
	332	}
	333
	334	int
	335	utf8_to_mac_roman(ByteCount srcLen, const unsigned char* srcStr, Str31 dstStr)
	336	{
	337	int error;
	338	UniChar uniStr[MAX_HFS_UNICODE_CHARS];
	339	size_t ucslen;
	340
	341	error = utf8_decodestr(srcStr, srcLen, uniStr, &ucslen, sizeof(uniStr), ':', 0);
	342	if (error == 0)
	343	error = unicode_to_mac_roman(uniStr, ucslen/sizeof(UniChar), dstStr);
	344
	345	return error;
	346	}
	347
	348	/*
	349	* HFS MacRoman to/from Unicode conversions are built into the kernel
	350	* All others hfs encodings are loadable.
	351	*/
	352
	353	/* 0x00A0 - 0x00FF = Latin 1 Supplement (30 total) */
	354	static UInt8 gLatin1Table[] = {
	355	/* 0 1 2 3 4 5 6 7 8 9 A B C D E F */
	356	/* 0x00A0 */ 0xCA, 0xC1, 0xA2, 0xA3, 0xDB, 0xB4, '?', 0xA4, 0xAC, 0xA9, 0xBB, 0xC7, 0xC2, '?', 0xA8, 0xF8,
	357	/* 0x00B0 */ 0xA1, 0XB1, '?', '?', 0xAB, 0xB5, 0xA6, 0xe1, 0xFC, '?', 0xBC, 0xC8, '?', '?', '?', 0xC0,
	358	/* 0x00C0 */ '?', '?', '?', '?', '?', '?', 0xAE, '?', '?', '?', '?', '?', '?', '?', '?', '?',
	359	/* 0x00D0 */ '?', '?', '?', '?', '?', '?', '?', '?', 0xAF, '?', '?', '?', '?', '?', '?', 0xA7,
	360	/* 0x00E0 */ '?', '?', '?', '?', '?', '?', 0xBE, '?', '?', '?', '?', '?', '?', '?', '?', '?',
	361	/* 0x00F0 */ '?', '?', '?', '?', '?', '?', '?', 0xD6, 0xBF, '?', '?', '?', '?', '?', '?', '?'
	362	};
	363
	364	/* 0x02C0 - 0x02DF = Spacing Modifiers (8 total) */
	365	static UInt8 gSpaceModsTable[] = {
	366	/* 0 1 2 3 4 5 6 7 8 9 A B C D E F */
	367	/* 0x02C0 */ '?', '?', '?', '?', '?', '?', 0xF6, 0xFF, '?', '?', '?', '?', '?', '?', '?', '?',
	368	/* 0x02D0 */ '?', '?', '?', '?', '?', '?', '?', '?', 0xF9, 0xFA, 0xFB, 0xFE, 0xF7, 0xFD, '?', '?'
	369	};
	370
	371	/* 0x2010 - 0x20AF = General Punctuation (17 total) */
	372	static UInt8 gPunctTable[] = {
	373	/* 0 1 2 3 4 5 6 7 8 9 A B C D E F */
	374	/* 0x2010 */ '?', '?', '?', 0xd0, 0xd1, '?', '?', '?', 0xd4, 0xd5, 0xe2, '?', 0xd2, 0xd3, 0xe3, '?',
	375	/* 0x2020 */ 0xa0, 0xe0, 0xa5, '?', '?', '?', 0xc9, '?', '?', '?', '?', '?', '?', '?', '?', '?',
	376	/* 0x2030 */ 0xe4, '?', '?', '?', '?', '?', '?', '?', '?', 0xdc, 0xdd, '?', '?', '?', '?', '?',
	377	/* 0x2040 */ '?', '?', '?', '?', 0xda, '?', '?', '?', '?', '?', '?', '?', '?', '?', '?', '?',
	378	/* 0x2050 */ '?', '?', '?', '?', '?', '?', '?', '?', '?', '?', '?', '?', '?', '?', '?', '?',
	379	/* 0x2060 */ '?', '?', '?', '?', '?', '?', '?', '?', '?', '?', '?', '?', '?', '?', '?', '?',
	380	/* 0x2070 */ '?', '?', '?', '?', '?', '?', '?', '?', '?', '?', '?', '?', '?', '?', '?', '?',
	381	/* 0x2080 */ '?', '?', '?', '?', '?', '?', '?', '?', '?', '?', '?', '?', '?', '?', '?', '?',
	382	/* 0x2090 */ '?', '?', '?', '?', '?', '?', '?', '?', '?', '?', '?', '?', '?', '?', '?', '?',
	383	/* 0x20A0 */ '?', '?', '?', '?', '?', '?', '?', '?', '?', '?', '?', '?', 0xdb, '?', '?', '?'
	384	};
	385
	386	/* 0x22xx = Mathematical Operators (11 total) */
	387	static UInt8 gMathTable[] = {
	388	/* 0 1 2 3 4 5 6 7 8 9 A B C D E F */
	389	/* 0x2200 */ '?', '?', 0xb6, '?', '?', '?', 0xc6, '?', '?', '?', '?', '?', '?', '?', '?', 0xb8,
	390	/* 0x2210 */ '?', 0xb7, '?', '?', '?', '?', '?', '?', '?', '?', 0xc3, '?', '?', '?', 0xb0, '?',
	391	/* 0x2220 */ '?', '?', '?', '?', '?', '?', '?', '?', '?', '?', '?', 0xba, '?', '?', '?', '?',
	392	/* 0x2230 */ '?', '?', '?', '?', '?', '?', '?', '?', '?', '?', '?', '?', '?', '?', '?', '?',
	393	/* 0x2240 */ '?', '?', '?', '?', '?', '?', '?', '?', 0xc5, '?', '?', '?', '?', '?', '?', '?',
394	/* 0x2250 */ '?', '?', '?', '?', '?', '?', '?', '?', '?', '?', '?', '?', '?', '?', '?', '?',
395	/* 0x2260 */ 0xad, '?', '?', '?', 0xb2, 0xb3, '?', '?'
396	};
397
398	/* */
399	static UInt8 gReverseCombTable[] = {
400	/* 0 1 2 3 4 5 6 7 8 9 A B C D E F */
401	/* 0x40 */ 0xDA, 0x40, 0xDA, 0xDA, 0xDA, 0x56, 0xDA, 0xDA, 0xDA, 0x6C, 0xDA, 0xDA, 0xDA, 0xDA, 0x82, 0x98,
402	/* 0x50 */ 0xDA, 0xDA, 0xDA, 0xDA, 0xDA, 0xAE, 0xDA, 0xDA, 0xDA, 0xC4, 0xDA, 0xDA, 0xDA, 0xDA, 0xDA, 0xDA,
403	/* 0x60 */ 0xDA, 0x4B, 0xDA, 0xDA, 0xDA, 0x61, 0xDA, 0xDA, 0xDA, 0x77, 0xDA, 0xDA, 0xDA, 0xDA, 0x8D, 0xA3,
404	/* 0x70 */ 0xDA, 0xDA, 0xDA, 0xDA, 0xDA, 0xB9, 0xDA, 0xDA, 0xDA, 0xCF, 0xDA, 0xDA, 0xDA, 0xDA, 0xDA, 0xDA,
405
406	/* Combining Diacritical Marks (0x0300 - 0x030A) */
407	/* 0 1 2 3 4 5 6 7 8 9 A */
408	/* 'A' */
409	/* 0x0300 */ 0xCB, 0xE7, 0xE5, 0xCC, '?', '?', '?', '?', 0x80, '?', 0x81,
410
411	/* 'a' */
412	/* 0x0300 */ 0x88, 0x87, 0x89, 0x8B, '?', '?', '?', '?', 0x8A, '?', 0x8C,
413
414	/* 'E' */
415	/* 0x0300 */ 0xE9, 0x83, 0xE6, '?', '?', '?', '?', '?', 0xE8, '?', '?',
416
417	/* 'e' */
418	/* 0x0300 */ 0x8F, 0x8E, 0x90, '?', '?', '?', '?', '?', 0x91, '?', '?',
419
420	/* 'I' */
421	/* 0x0300 */ 0xED, 0xEA, 0xEB, '?', '?', '?', '?', '?', 0xEC, '?', '?',
422
423	/* 'i' */
424	/* 0x0300 */ 0x93, 0x92, 0x94, '?', '?', '?', '?', '?', 0x95, '?', '?',
425
426	/* 'N' */
427	/* 0x0300 */ '?', '?', '?', 0x84, '?', '?', '?', '?', '?', '?', '?',
428
429	/* 'n' */
430	/* 0x0300 */ '?', '?', '?', 0x96, '?', '?', '?', '?', '?', '?', '?',
431
432	/* 'O' */
433	/* 0x0300 */ 0xF1, 0xEE, 0xEF, 0xCD, '?', '?', '?', '?', 0x85, '?', '?',
434
435	/* 'o' */
436	/* 0x0300 */ 0x98, 0x97, 0x99, 0x9B, '?', '?', '?', '?', 0x9A, '?', '?',
437
438	/* 'U' */
439	/* 0x0300 */ 0xF4, 0xF2, 0xF3, '?', '?', '?', '?', '?', 0x86, '?', '?',
440
441	/* 'u' */
442	/* 0x0300 */ 0x9D, 0x9C, 0x9E, '?', '?', '?', '?', '?', 0x9F, '?', '?',
443
444	/* 'Y' */
445	/* 0x0300 */ '?', '?', '?', '?', '?', '?', '?', '?', 0xD9, '?', '?',
446
447	/* 'y' */
448	/* 0x0300 */ '?', '?', '?', '?', '?', '?', '?', '?', 0xD8, '?', '?',
449
450	/* else */
451	/* 0x0300 */ '?', '?', '?', '?', '?', '?', '?', '?', '?', '?', '?'
452	};
453
454
455	/*
456	* Convert Unicode string into HFS MacRoman encoding
457	*
458	* Assumes Unicode input is fully decomposed
459	*/
460	static int unicode_to_mac_roman(UniChar *uni_str, UInt32 unicodeChars, Str31 hfs_str)
461	{
462	UInt8 *p;
463	const UniChar *u;
464	UniChar c;
465	UniChar mask;
466	UInt16 inputChars;
467	UInt16 pascalChars;
468	OSErr result = noErr;
469	UInt8 lsb;
470	UInt8 prevChar;
471	UInt8 mc;
472
473	mask = (UniChar) 0xFF80;
474	p = &hfs_str[1];
475	u = uni_str;
476	inputChars = unicodeChars;
477	pascalChars = prevChar = 0;
478
479	while (inputChars) {
480	c = *(u++);
481	lsb = (UInt8) c;
482
483	/*
484	* If its not 7-bit ascii, then we need to map it
485	*/
486	if ( c & mask ) {
487	mc = '?';
488	switch (c & 0xFF00) {
489	case 0x0000:
490	if (lsb >= 0xA0)
491	mc = gLatin1Table[lsb - 0xA0];
492	break;
493
494	case 0x0200:
495	if (lsb >= 0xC0 && lsb <= 0xDF)
496	mc = gSpaceModsTable[lsb - 0xC0];
497	break;
498
499	case 0x2000:
500	if (lsb >= 0x10 && lsb <= 0xAF)
501	mc = gPunctTable[lsb- 0x10];
502	break;
503
504	case 0x2200:
505	if (lsb <= 0x68)
506	mc = gMathTable[lsb];
507	break;
508
509	case 0x0300:
510	if (c <= 0x030A) {
511	if (prevChar >= 'A' && prevChar < 'z') {
512	mc = gReverseCombTable[gReverseCombTable[prevChar - 0x40] + lsb];
513	--p; /* backup over base char */
514	--pascalChars;
515	}
516	} else {
517	switch (c) {
518	case 0x0327: /* combining cedilla */
519	if (prevChar == 'C')
520	mc = 0x82;
521	else if (prevChar == 'c')
522	mc = 0x8D;
523	else
524	break;
525	--p; /* backup over base char */
526	--pascalChars;
527	break;
528
529	case 0x03A9: mc = 0xBD; break; /* omega */
530
531	case 0x03C0: mc = 0xB9; break; /* pi */
532	}
533	}
534	break;
535
536	default:
537	switch (c) {
538	case 0x0131: mc = 0xf5; break; /* dotless i */
539
540	case 0x0152: mc = 0xce; break; /* OE */
541
542	case 0x0153: mc = 0xcf; break; /* oe */
543
544