xnu-2050.48.11.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 630779e2467ab333d3b2bd8d329a7b994eccdc55..94b926e9ecf3f4e316a38c5731bb483d3ba84b7d 100644 (file)
--- a/bsd/hfs/hfs_encodinghint.c
+++ b/bsd/hfs/hfs_encodinghint.c
@@ -1,16 +1,19 @@
 /*
- * Copyright (c) 2001-2002 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 2001-2003 Apple Computer, Inc. All rights reserved.
  *
- * @APPLE_LICENSE_HEADER_START@
- * 
- * Copyright (c) 1999-2003 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. Please obtain a copy of the License at
- * http://www.opensource.apple.com/apsl/ and read it before using this
- * file.
+ * 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
@@ -20,11 +23,13 @@
  * 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 <hfs/hfs.h>
 
 
 /* CJK Mac Encoding Bits */
@@ -34,15 +39,18 @@
 #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)
 
 
 /* Remember the last unique CJK bit */
 u_int8_t cjk_lastunique = 0;
 
-/* CJK encoding bias */
+/* Encoding bias */
 u_int32_t hfs_encodingbias = 0;
+int hfs_islatinbias = 0;
+
+extern lck_mtx_t  encodinglst_mutex;
 
 
 /* Map CJK bits to Mac encoding */
@@ -793,6 +801,14 @@ hfs_pickencoding(const u_int16_t *src, int len)
                                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;
@@ -806,6 +822,35 @@ hfs_pickencoding(const u_int16_t *src, int len)
                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;
                }
@@ -853,3 +898,50 @@ hfs_pickencoding(const u_int16_t *src, int len)
 }
 
 
+__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 */
+