Changed from char types to PRUint8.

intl/uconv/ucvcn/gbku.h

@@ -1,3 +1,17 @@
+/*
+ *
+ * The contents of this file are subject to the Netscape Public License
+ * Version 1.0 (the "NPL"); you may not use this file except in
+ * compliance with the NPL.  You may obtain a copy of the NPL at
+ * http://www.mozilla.org/NPL/
+ *
+ * Software distributed under the NPL is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
+ * for the specific language governing rights and limitations under the
+ * NPL.
+ *
+ * The Initial Developer of this code under the NPL is Intel Corporation.
+ */ 
 // =======================================================================
 // Original Author: Yueheng Xu
 // email: yueheng.xu@intel.com
@@ -6,8 +20,13 @@
 // Last Update: September 7, 1999
 // Revision History: 
 // 09/07/1999 - initial version.
-// =======================================================================
-// This table maps the GBK code to its unicode.
+// 09/28/1999 - changed leftbyte and rightbyte from char to unsigned char 
+//              in struct DByte
+// 04/10/1999 - changed leftbyte. rightbyte to PRUint8 in struct DByte;
+//              added table UnicodeToGBKTable[0x5200]
+//            
+// ======================================================================================
+// Table GBKToUnicode[] maps the GBK code to its unicode.
 // The mapping data of this GBK table is obtained from 
 // ftp://ftp.unicode.org/Public/MAPPINGS/VENDORS/MICSFT/WINDOWS/CP936.TXT
 // Frank Tang of Netscape wrote the original perl tool to re-align the 
@@ -19,6 +38,12 @@
 // [0x40, 0xfe] for the right byte. Those invalid chars whose right byte 
 // is 0x7f will be mapped to undefined unicode 0xFFFF.
 //
+// 
+// Table UnicodeToGBK[] maps the unicode to GBK code. To reduce memory usage, we
+// only do Unicode to GBK table mapping for unicode between 0x4E00 and 0xA000; 
+// Others let converter to do search from table GBKToUnicode[]. If we want further
+// trade memory for performance, we can let more unicode to do table mapping to get
+// its GBK instead of searching table GBKToUnicode[]. 
 
 #ifdef _GBKU_TABLE_
 
@@ -27,12 +52,18 @@
 
 typedef struct
 {
-    char leftbyte;
-    char rightbyte;
+
+  PRUint8 leftbyte;
+  PRUint8 rightbyte;
 
 } DByte;
 extern PRUnichar GBKToUnicodeTable[MAX_GBK_LENGTH];
 
+#ifdef _UNICODE_TO_GBK_ENCODER_
+DByte UnicodeToGBKTable[0x5200];
+#else
+extern DByte UnicodeToGBKTable[0x5200]; // 0xA000 - 0x4E00 = 0x5200
+#endif
 
 #else
 
@@ -42,10 +73,10 @@ extern PRUnichar GBKToUnicodeTable[MAX_GBK_LENGTH];
 #define GB_UNDEFINED 0xFFFF
 #define MAX_GBK_LENGTH	  24066   /* (0xfe-0x80)*(0xfe-0x3f) */
 
-typedef struct
-{
-    char leftbyte;
-    char rightbyte;
+typedef struct 
+{ 
+  PRUint8 leftbyte;
+  PRUint8 rightbyte;
 
 } DByte;
 
@@ -57,6 +88,12 @@ PRUnichar GBKToUnicodeTable[MAX_GBK_LENGTH] =
 };
 
 
+#ifdef _UNICODE_TO_GBK_ENCODER_
+DByte UnicodeToGBKTable[0x5200];
+#else
+extern DByte UnicodeToGBKTable[0x5200]; // 0xA000 - 0x4E00 = 0x5200
+#endif
+
 
 #endif /* ifdef _GBKU_TABLE_ */