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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.
*
* This program covers UTF-7 to UTF-8, UCS-2, and, UCS-4 code conversions.
* UTF-7 described in RFC 2152.
* We don't support any other UCS formats to and from UTF-7 unless there is
* a significant requirement.
*/
#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <sys/types.h>
#include <sys/isa_defs.h>
#include "utf7_to_ucs.h"
void *
_icv_open()
{
utf7_state_t *cd = (utf7_state_t *)calloc(1, sizeof(utf7_state_t));
if (cd == (utf7_state_t *)NULL) {
errno = ENOMEM;
return((void *)-1);
}
#if defined(_LITTLE_ENDIAN)
cd->little_endian = true;
#endif
return((void *)cd);
}
void
_icv_close(utf7_state_t *cd)
{
if (! cd)
errno = EBADF;
else
free((void *)cd);
}
size_t
_icv_iconv(utf7_state_t *cd, char **inbuf, size_t *inbufleft, char **outbuf,
size_t *outbufleft)
{
size_t ret_val = 0;
uchar_t *ib;
uchar_t *ob;
uchar_t *ibtail;
uchar_t *obtail;
if (! cd) {
errno = EBADF;
return((size_t)-1);
}
if (!inbuf || !(*inbuf)) {
/* We just ignore any remnant bits we so far accumulated. */
cd->in_the_middle_of_utf7_sequence = false;
cd->remnant = 0;
cd->remnant_count = 0;
cd->prevch = (uchar_t)'\0';
return((size_t)0);
}
ib = (uchar_t *)*inbuf;
ob = (uchar_t *)*outbuf;
ibtail = ib + *inbufleft;
obtail = ob + *outbufleft;
while (ib < ibtail) {
uint_t temp_remnant;
uint_t u4;
#if defined(UCS_2) || defined(UCS_4)
signed char obsz;
#endif
u4 = ICV_U7_UCS4_OUTOFUTF16;
if (cd->in_the_middle_of_utf7_sequence) {
if (rmb64[*ib] >= 0) {
temp_remnant = (cd->remnant << 6) | rmb64[*ib];
switch (cd->remnant_count) {
case ICV_U7_ACTION_HARVEST1:
u4 = (temp_remnant >> 2) & 0xffff;
break;
case ICV_U7_ACTION_HARVEST2:
u4 = (temp_remnant >> 4) & 0xffff;
break;
case ICV_U7_ACTION_HARVEST3:
u4 = temp_remnant & 0xffff;
break;
}
if (u4 != ICV_U7_UCS4_OUTOFUTF16) {
if (u4 == 0x00fffe || u4 == 0x00ffff ||
(u4 >= 0x00d800 &&
u4 <= 0x00dfff)) {
errno = EILSEQ;
ret_val = (size_t)-1;
break;
}
#if defined(UCS_2)
CHECK_OUTBUF_SZ_AND_WRITE_U2;
#elif defined(UCS_4)
CHECK_OUTBUF_SZ_AND_WRITE_U4;
#elif defined(UTF_8)
CHECK_OUTBUF_SZ_AND_WRITE_U8_OR_EILSEQ;
#else
#error "Fatal: One of UCS_2, UCS_4, or, UTF_8 is needed."
#endif
}
/* It's now safe to have the bits. */
cd->remnant = temp_remnant;
if (cd->remnant_count == ICV_U7_ACTION_HARVEST3)
cd->remnant_count = ICV_U7_ACTION_START;
else
cd->remnant_count++;
} else {
if (*ib == (uint_t)'-') {
if (cd->prevch == '+')
u4 = (uint_t)'+';
} else
u4 = (uint_t)(*ib);
switch (cd->remnant_count) {
case ICV_U7_ACTION_START:
/* (ICV_U7_ACTION_HARVEST3+1): */
/* These are normal cases. */
break;
case (ICV_U7_ACTION_HARVEST1+1):
if (cd->remnant & 0x03) {
errno = EILSEQ;
ret_val = (size_t)-1;
goto illegal_char_err;
}
break;
case (ICV_U7_ACTION_HARVEST2+1):
if (cd->remnant & 0x0f) {
errno = EILSEQ;
ret_val = (size_t)-1;
goto illegal_char_err;
}
break;
default:
errno = EILSEQ;
ret_val = (size_t)-1;
goto illegal_char_err;
break;
}
if (u4 != ICV_U7_UCS4_OUTOFUTF16) {
#if defined(UCS_2)
CHECK_OUTBUF_SZ_AND_WRITE_U2;
#elif defined(UCS_4)
CHECK_OUTBUF_SZ_AND_WRITE_U4;
#elif defined(UTF_8)
if (ob >= obtail) {
errno = E2BIG;
ret_val = (size_t)-1;
break;
}
*ob++ = (uchar_t)(u4 & 0x7f);
#else
#error "Fatal: One of UCS_2, UCS_4, or, UTF_8 is needed."
#endif
}
cd->in_the_middle_of_utf7_sequence = false;
cd->remnant = 0;
cd->remnant_count = 0;
}
} else {
if (*ib == '+') {
cd->in_the_middle_of_utf7_sequence = true;
cd->remnant = 0;
cd->remnant_count = 0;
} else {
#if defined(UCS_2)
u4 = (uint_t)*ib;
CHECK_OUTBUF_SZ_AND_WRITE_U2;
#elif defined(UCS_4)
u4 = (uint_t)*ib;
CHECK_OUTBUF_SZ_AND_WRITE_U4;
#elif defined(UTF_8)
if (ob >= obtail) {
errno = E2BIG;
ret_val = (size_t)-1;
break;
}
*ob++ = *ib;
#else
#error "Fatal: One of UCS_2, UCS_4, or, UTF_8 is needed."
#endif
}
}
cd->prevch = *ib++;
}
illegal_char_err:
*inbuf = (char *)ib;
*inbufleft = ibtail - ib;
*outbuf = (char *)ob;
*outbufleft = obtail - ob;
return(ret_val);
}
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