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- /*++
-
- Copyright (c) Microsoft Corporation All rights reserved.
-
- Module Name:
-
- utf.h
-
- Abstract:
-
- This file contains the header information for the UTF module of NLS.
-
- Revision History:
-
- 02-06-96 JulieB Created.
-
- --*/
-
-
-
- //
- // Constant Declarations.
- //
-
- #define ASCII 0x007f
-
- #define SHIFT_IN '+' // beginning of a shift sequence
- #define SHIFT_OUT '-' // end of a shift sequence
-
- #define UTF8_2_MAX 0x07ff // max UTF8 2-byte sequence (32 * 64 = 2048)
- #define UTF8_1ST_OF_2 0xc0 // 110x xxxx
- #define UTF8_1ST_OF_3 0xe0 // 1110 xxxx
- #define UTF8_TRAIL 0x80 // 10xx xxxx
-
- #define HIGER_6_BIT(u) ((u) >> 12)
- #define MIDDLE_6_BIT(u) (((u) & 0x0fc0) >> 6)
- #define LOWER_6_BIT(u) ((u) & 0x003f)
-
- #define BIT7(a) ((a) & 0x80)
- #define BIT6(a) ((a) & 0x40)
-
-
-
-
- /////////////////////////
- // //
- // Unicode -> UTF-7 //
- // //
- /////////////////////////
-
- //
- // Convert one Unicode to 2 2/3 Base64 chars in a shifted sequence.
- // Each char represents a 6-bit portion of the 16-bit Unicode char.
- //
- CONST char cBase64[] =
-
- "ABCDEFGHIJKLMNOPQRSTUVWXYZ" // A : 000000 .... 011001 ( 0 - 25)
- "abcdefghijklmnopqrstuvwxyz" // a : 011010 .... 110011 (26 - 51)
- "0123456789" // 0 : 110100 .... 111101 (52 - 61)
- "+/"; // + : 111110, / : 111111 (62 - 63)
-
- //
- // To determine if an ASCII char needs to be shifted.
- // 1 : to be shifted
- // 0 : not to be shifted
- //
- CONST BOOLEAN fShiftChar[] =
- {
- 0, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 1, 1, 0, 1, 1, // Null, Tab, LF, CR
- 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
- 0, 1, 1, 1, 1, 1, 1, 0, 0, 0, 1, 0, 0, 0, 0, 0, // Space '() +,-./
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 0, // 0123456789: ?
- 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // ABCDEFGHIJKLMNO
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, // PQRSTUVWXYZ
- 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // abcdefghijklmno
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1 // pqrstuvwxyz
- };
-
-
-
-
- /////////////////////////
- // //
- // UTF-7 -> Unicode //
- // //
- /////////////////////////
-
- //
- // Convert a Base64 char in a shifted sequence to a 6-bit portion of a
- // Unicode char.
- // -1 means it is not a Base64
- //
- CONST char nBitBase64[] =
- {
- -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
- -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
- -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 62, -1, -1, -1, 63, // + /
- 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, -1, -1, -1, -1, -1, -1, // 0123456789
- -1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, // ABCDEFGHIJKLMNO
- 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, -1, -1, -1, -1, -1, // PQRSTUVWXYZ
- -1, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, // abcdefghijklmno
- 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, -1, -1, -1, -1, -1 // pqrstuvwxyz
- };
-