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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright (c) 1998-1999 by Sun Microsystems, Inc.
* All rights reserved.
*/
#ifndef UTF7_TO_UCS_H
#define UTF7_TO_UCS_H
#include "common_defs.h"
/* Modified Base64 alphabet to Value mapping table -- see RFC 2045. */
static const signed char rmb64[0x100] = {
/*00*/ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
/*10*/ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
/*20*/ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 62, -1, -1, -1, 63,
/*30*/ 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, -1, -1, -1, -1, -1, -1,
/*40*/ -1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14,
/*50*/ 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, -1, -1, -1, -1, -1,
/*60*/ -1, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40,
/*70*/ 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, -1, -1, -1, -1, -1,
/*80*/ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
/*90*/ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
/*a0*/ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
/*b0*/ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
/*c0*/ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
/*d0*/ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
/*e0*/ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
/*f0*/ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
};
/*
* Any UCS-2 character sequences will yield:
*
* +-16 bits (UCS-2)-+ +-16 bits (UCS-2)-+ +-16 bits (UCS-2)-+
* | | | | | |
* xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx
* | || | | || | | || | | || |
* +--0--++--1--+ +---2--++--3--+ +--4--++---5--+ +--6--++--7--+ MBase64 chars
* ^ ^
* initially, | |
* four remnant bits, |
* two remnant bits,
*
* and, then no remnant bit for three sequential UCS-2 characters,
* respectively, and repeat these three UCS-2 character sequences. For the
* first UCS-2 character in this sequence, there will be two MBase64
* characters, and for the second and the third UCS-2 characters, there will be
* three MBase64 characters.
*
* Following action numbers, 0, 2, 5, and, 7, are assigned to each of
* corresponding MBase64 characters that can either yield a UCS-2 character or
* indicate a character that is the starting/initial one.
*/
#define ICV_U7_ACTION_START 0
#define ICV_U7_ACTION_HARVEST1 2
#define ICV_U7_ACTION_HARVEST2 5
#define ICV_U7_ACTION_HARVEST3 7
#define ICV_U7_UCS4_OUTOFUTF16 0xfffefeff
#define OUTBUF_SIZE_CHECK(sz) \
if ((obtail - ob) < (sz)) { \
errno = E2BIG; \
ret_val = (size_t)-1; \
break; \
}
/*
* For better performance and readability, we perfer to write macros like
* below instead of putting them in functions and then calling them.
*/
#define CHECK_OUTBUF_SZ_AND_WRITE_U2 \
obsz = (cd->bom_written) ? ICV_FETCH_UCS_SIZE : ICV_FETCH_UCS_SIZE_TWO;\
if ((obtail - ob) < obsz) { \
errno = E2BIG; \
ret_val = (size_t)-1; \
break; \
} \
if (cd->little_endian) { \
if (! cd->bom_written) { \
*ob++ = (uchar_t)0xff; \
*ob++ = (uchar_t)0xfe; \
cd->bom_written = true; \
} \
*ob++ = (uchar_t)(u4 & 0xff); \
*ob++ = (uchar_t)((u4 >> 8) & 0xff); \
} else { \
if (! cd->bom_written) { \
*ob++ = (uchar_t)0xfe; \
*ob++ = (uchar_t)0xff; \
cd->bom_written = true; \
} \
*ob++ = (uchar_t)((u4 >> 8) & 0xff); \
*ob++ = (uchar_t)(u4 & 0xff); \
}
#define CHECK_OUTBUF_SZ_AND_WRITE_U4 \
obsz = (cd->bom_written) ? ICV_FETCH_UCS_SIZE : ICV_FETCH_UCS_SIZE_TWO;\
if ((obtail - ob) < obsz) { \
errno = E2BIG; \
ret_val = (size_t)-1; \
break; \
} \
if (cd->little_endian) { \
if (! cd->bom_written) { \
*ob++ = (uchar_t)0xff; \
*ob++ = (uchar_t)0xfe; \
*(ushort_t *)ob = (ushort_t)0; \
ob += 2; \
cd->bom_written = true; \
} \
*ob++ = (uchar_t)(u4 & 0xff); \
*ob++ = (uchar_t)((u4 >> 8) & 0xff); \
*ob++ = (uchar_t)((u4 >> 16) & 0xff); \
*ob++ = (uchar_t)((u4 >> 24) & 0xff); \
} else { \
if (! cd->bom_written) { \
*(ushort_t *)ob = (ushort_t)0; \
ob += 2; \
*ob++ = (uchar_t)0xfe; \
*ob++ = (uchar_t)0xff; \
cd->bom_written = true; \
} \
*ob++ = (uchar_t)((u4 >> 24) & 0xff); \
*ob++ = (uchar_t)((u4 >> 16) & 0xff); \
*ob++ = (uchar_t)((u4 >> 8) & 0xff); \
*ob++ = (uchar_t)(u4 & 0xff); \
}
/*
* UTF-7's code range is basically that of UTF-16, i.e.,
* U+0000 0000 ~ U+0010 FFFF, it cannot go beyond the U+0010 FFFF.
*/
#define CHECK_OUTBUF_SZ_AND_WRITE_U8_OR_EILSEQ \
if (u4 <= 0x7f) { \
OUTBUF_SIZE_CHECK(1); \
*ob++ = (uchar_t)u4; \
} else if (u4 <= 0x7ff) { \
OUTBUF_SIZE_CHECK(2); \
*ob++ = (uchar_t)(0xc0 | ((u4 & 0x07c0) >> 6)); \
*ob++ = (uchar_t)(0x80 | (u4 & 0x003f)); \
} else if (u4 <= 0x00ffff) { \
OUTBUF_SIZE_CHECK(3); \
*ob++ = (uchar_t)(0xe0 | ((u4 & 0x0f000) >> 12)); \
*ob++ = (uchar_t)(0x80 | ((u4 & 0x00fc0) >> 6)); \
*ob++ = (uchar_t)(0x80 | (u4 & 0x0003f)); \
} else if (u4 <= 0x10ffff) { \
OUTBUF_SIZE_CHECK(4); \
*ob++ = (uchar_t)(0xf0 | ((u4 & 0x01c0000) >> 18)); \
*ob++ = (uchar_t)(0x80 | ((u4 & 0x003f000) >> 12)); \
*ob++ = (uchar_t)(0x80 | ((u4 & 0x0000fc0) >> 6)); \
*ob++ = (uchar_t)(0x80 | (u4 & 0x000003f)); \
} else { \
errno = EILSEQ; \
ret_val = (size_t)-1; \
break; \
}
#endif /* UTF7_TO_UCS_H */
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