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56 lines
2.5 KiB
C
56 lines
2.5 KiB
C
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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// =======================================================================
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// Original Author: Yueheng Xu
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// email: yueheng.xu@intel.com
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// phone: (503)264-2248
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// Intel Corporation, Oregon, USA
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// Last Update: September 7, 1999
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// Revision History:
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// 09/07/1999 - initial version.
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// 09/28/1999 - changed leftbyte and rightbyte from char to unsigned char
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// in struct DByte
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// 04/10/1999 - changed leftbyte. rightbyte to uint8_t in struct DByte;
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// added table UnicodeToGBKTable[0x5200]
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//
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// 05/16/2000 - added gUnicodeToGBKTableInitialized flag for optimization
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// ======================================================================================
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// Table GBKToUnicode[] maps the GBK code to its unicode.
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// The mapping data of this GBK table is obtained from
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// ftp://ftp.unicode.org/Public/MAPPINGS/VENDORS/MICSFT/WINDOWS/CP936.TXT
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// Frank Tang of Netscape wrote the original perl tool to re-align the
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// mapping data into an 8-item per line format ( i.e. file cp936map.txt ).
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//
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// The valid GBK charset range: left byte is [0x81, 0xfe], right byte are
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// [0x40, 0x7e] and [0x80, 0xfe]. But for the convenience of index
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// calculation, the table here has a single consecutive range of
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// [0x40, 0xfe] for the right byte. Those invalid chars whose right byte
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// is 0x7f will be mapped to undefined unicode 0xFFFF.
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//
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//
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// Table UnicodeToGBK[] maps the unicode to GBK code. To reduce memory usage, we
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// only do Unicode to GBK table mapping for unicode between 0x4E00 and 0xA000;
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// Others let converter to do search from table GBKToUnicode[]. If we want further
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// trade memory for performance, we can let more unicode to do table mapping to get
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// its GBK instead of searching table GBKToUnicode[].
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#ifndef _GBKU_H__
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#define _GBKU_H__
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#define UCS2_NO_MAPPING ((char16_t) 0xfffd)
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#define UINT8_IN_RANGE(a, b, c) \
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(((uint8_t)(a) <= (uint8_t)(b))&&((uint8_t)(b) <= (uint8_t)(c)))
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#define UNICHAR_IN_RANGE(a, b, c) \
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(((char16_t)(a) <= (char16_t)(b))&&((char16_t)(b) <= (char16_t)(c)))
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#define CAST_CHAR_TO_UNICHAR(a) ((char16_t)((unsigned char)(a)))
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#define CAST_UNICHAR_TO_CHAR(a) ((char)a)
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#define IS_ASCII(a) (0==(0xff80 & (a)))
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#define IS_GBK_EURO(c) ((char)0x80 == (c))
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#define UCS2_EURO ((char16_t) 0x20ac)
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#include "nsGBKConvUtil.h"
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#endif /* _GBKU_H__ */
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