xnu-2422.115.4.tar.gz

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

diff --git a/bsd/hfs/hfs_encodinghint.c b/bsd/hfs/hfs_encodinghint.c
index 776f2b361d9c52d0811697dfe0561a86b208461d..232944bd94f41af7fa73f7924310f1b88c03b1f2 100644 (file)
--- a/bsd/hfs/hfs_encodinghint.c
+++ b/bsd/hfs/hfs_encodinghint.c
@@ -1,27 +1,35 @@
 /*
 /*

- * Copyright (c) 2001 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 2001-2013 Apple Computer, Inc. All rights reserved.

  *
  *

- * @APPLE_LICENSE_HEADER_START@
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_START@

  * 
  * 

- * The contents of this file constitute Original Code as defined in and
- * are subject to the Apple Public Source License Version 1.1 (the
- * "License").  You may not use this file except in compliance with the
- * License.  Please obtain a copy of the License at
- * http://www.apple.com/publicsource and read it before using this file.
+ * 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.

  * 
  * 

- * This Original Code and all software distributed under the License are
- * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * 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,
  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,

- * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
- * License for the specific language governing rights and limitations
- * under the License.
+ * 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_LICENSE_HEADER_END@
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_END@

  */
  */

+#if HFS

 
 #include <sys/param.h>
 #include <hfs/hfs_macos_defs.h>
 
 #include <sys/param.h>
 #include <hfs/hfs_macos_defs.h>

+#include <hfs/hfs.h>

 
 
 /* CJK Mac Encoding Bits */
 
 
 /* CJK Mac Encoding Bits */


@@ -31,13 +39,19 @@
 #define CJK_CHINESE_SIMP       0x8
 #define CJK_ALL                    0xF
 
 #define CJK_CHINESE_SIMP       0x8
 #define CJK_ALL                    0xF
 

-#define CJK_CHINESE        (CJK_CHINESE_TRAD | CJK_CHINESE_SIMP)
-#define CJK_KATAKANA   (CJK_JAPAN | CJK_CHINESE_SIMP | CJK_KOREAN)
+#define CJK_CHINESE    (CJK_CHINESE_TRAD | CJK_CHINESE_SIMP)
+#define CJK_KATAKANA   (CJK_JAPAN)

 
 
 
 

-/* Remeber the las unique CJK bit */
+/* Remember the last unique CJK bit */

 u_int8_t cjk_lastunique = 0;
 
 u_int8_t cjk_lastunique = 0;
 

+/* Encoding bias */
+u_int32_t hfs_encodingbias = 0;
+int hfs_islatinbias = 0;
+
+extern lck_mtx_t  encodinglst_mutex;
+

 
 /* Map CJK bits to Mac encoding */
 u_int8_t cjk_encoding[] = {
 
 /* Map CJK bits to Mac encoding */
 u_int8_t cjk_encoding[] = {


@@ -59,6 +73,9 @@ u_int8_t cjk_encoding[] = {
        /* 1111 */  kTextEncodingMacJapanese
 };
 
        /* 1111 */  kTextEncodingMacJapanese
 };
 

+
+#if CONFIG_HFS_STD
+

 /*
  * CJK Mac Encoding Bitmap
  *
 /*
  * CJK Mac Encoding Bitmap
  *


@@ -722,6 +739,7 @@ static u_int8_t cjk_bitmap[] = {
  0x0D,0x04,0x04,0x00,0x00,0x00,0x00,0x00,
 };
 
  0x0D,0x04,0x04,0x00,0x00,0x00,0x00,0x00,
 };
 

+

 /*
  * Pick a suitable Mac encoding value for a Unicode string.
  *
 /*
  * Pick a suitable Mac encoding value for a Unicode string.
  *


@@ -787,6 +805,14 @@ hfs_pickencoding(const u_int16_t *src, int len)
                                cjkstate = CJK_ALL;
                        continue;
                }
                                cjkstate = CJK_ALL;
                        continue;
                }

+               if (hfs_islatinbias && ch >= 0x0300 && ch <= 0x0329) {
+                       guess = hfs_encodingbias;
+                       continue;
+               }
+               if (ch <= 0x03CE && ch >= 0x0384) {
+                       guess = kTextEncodingMacGreek;
+                       continue;
+               }

                if (ch <= 0x0491 && ch >= 0x0401) {
                        guess = kTextEncodingMacCyrillic;
                        continue;
                if (ch <= 0x0491 && ch >= 0x0401) {
                        guess = kTextEncodingMacCyrillic;
                        continue;


@@ -800,6 +826,35 @@ hfs_pickencoding(const u_int16_t *src, int len)
                if (ch >= 0x0E00 && ch <= 0x0E5B) {
                        return kTextEncodingMacThai;
                }
                if (ch >= 0x0E00 && ch <= 0x0E5B) {
                        return kTextEncodingMacThai;
                }

+               /* Catch a few Shift-JIS strays */
+               if (guess == 0 || guess == kTextEncodingMacUnicode) {
+                       if (ch == 0x2010 || ch == 0x2014 || ch == 0x2015 || ch == 0x2016) {
+                               guess = kTextEncodingMacJapanese;
+                               if ((cjkstate == 0) || (cjkstate & CJK_JAPAN))
+                                       cjkstate = CJK_JAPAN;
+                               else
+                                       cjkstate |= CJK_JAPAN;
+                               continue;
+                       }
+                       if ((hfs_encodingbias == kTextEncodingMacJapanese) &&
+                           (ch == 0x00A2 || ch == 0x00A3 || ch == 0x00AC)) {
+                               guess = kTextEncodingMacJapanese;
+                               continue;
+                       }
+                       /* TM char depends on the Mac encoding used. */
+                       if (ch == 0x2122) {
+                               switch(hfs_encodingbias) {
+                               case kTextEncodingMacJapanese:
+                               case kTextEncodingMacChineseTrad:
+                               case kTextEncodingMacKorean:
+                               case kTextEncodingMacGreek:
+                               case kTextEncodingMacThai:
+                               case kTextEncodingMacChineseSimp:
+                                       guess = hfs_encodingbias;
+                                       break;
+                               }
+                       }
+               }

                if (guess == 0 && ch > 0x2122) {
                        guess = kTextEncodingMacUnicode;
                }
                if (guess == 0 && ch > 0x2122) {
                        guess = kTextEncodingMacUnicode;
                }


@@ -808,7 +863,33 @@ hfs_pickencoding(const u_int16_t *src, int len)
        if (cjkstate) {
                if (powerof2(cjkstate)) {
                        cjk_lastunique = cjkstate;
        if (cjkstate) {
                if (powerof2(cjkstate)) {
                        cjk_lastunique = cjkstate;

-               } else if (cjk_lastunique) {
+                       return ((u_int32_t)cjk_encoding[cjkstate]);
+               } 
+               if (hfs_encodingbias != 0) {
+                       switch(hfs_encodingbias) {
+                       case kTextEncodingMacJapanese:
+                               if (cjkstate & CJK_JAPAN)
+                                       return (kTextEncodingMacJapanese);
+                               break;
+                       case kTextEncodingMacKorean:
+                               if (cjkstate & CJK_KOREAN)
+                                       return (kTextEncodingMacKorean);
+                               break;
+                       case kTextEncodingMacChineseTrad:
+                               if (cjkstate & CJK_CHINESE_TRAD)
+                                       return (kTextEncodingMacChineseTrad);
+                               if (cjkstate & CJK_CHINESE_SIMP)
+                                       return (kTextEncodingMacChineseSimp);
+                               break;
+                       case kTextEncodingMacChineseSimp:
+                               if (cjkstate & CJK_CHINESE_SIMP)
+                                       return (kTextEncodingMacChineseSimp);
+                               if (cjkstate & CJK_CHINESE_TRAD)
+                                       return (kTextEncodingMacChineseTrad);
+                               break;
+                       }
+               }
+               if (cjk_lastunique) {

                        if (cjkstate & cjk_lastunique)
                                cjkstate = cjk_lastunique;
                        else
                        if (cjkstate & cjk_lastunique)
                                cjkstate = cjk_lastunique;
                        else


@@ -820,4 +901,61 @@ hfs_pickencoding(const u_int16_t *src, int len)
        return guess;
 }
 
        return guess;
 }
 

+#else /* HFS standard *NOT* supported */
+
+u_int32_t
+hfs_pickencoding(__unused const u_int16_t *src, __unused int len) {
+       /* Just return kTextEncodingMacRoman if HFS standard is not supported. */
+       return kTextEncodingMacRoman;
+}
+
+#endif  /* CONFIG_HFS_STD */
+
+
+__private_extern__
+u_int32_t
+hfs_getencodingbias(void)
+{
+       return (hfs_encodingbias);
+}
+
+
+__private_extern__
+void
+hfs_setencodingbias(u_int32_t bias)
+{
+       lck_mtx_lock(&encodinglst_mutex);
+
+       hfs_encodingbias = bias;
+
+       switch (bias) {
+       case kTextEncodingMacRoman:
+       case kTextEncodingMacCentralEurRoman:
+       case kTextEncodingMacTurkish:
+       case kTextEncodingMacCroatian:
+       case kTextEncodingMacIcelandic:
+       case kTextEncodingMacRomanian:
+               hfs_islatinbias = 1;
+               break;
+       default:
+               hfs_islatinbias = 0;
+               break;                                  
+       }
+
+       lck_mtx_unlock(&encodinglst_mutex);
+}
+
+#else /* not HFS - temp workaround until 4277828 is fixed */
+/* stubs for exported routines that aren't present when we build kernel without HFS */
+
+#include <sys/types.h>
+
+u_int32_t hfs_pickencoding(u_int16_t *src, int len);
+
+u_int32_t hfs_pickencoding(__unused u_int16_t *src, __unused int len)
+{
+       return(0);
+}
+
+#endif /* HFS */