freebsd-dev/sys/libkern/iconv_xlat16.c
Pedro F. Giffuni 8a36da99de sys/kern: adoption of SPDX licensing ID tags.
Mainly focus on files that use BSD 2-Clause license, however the tool I
was using misidentified many licenses so this was mostly a manual - error
prone - task.

The Software Package Data Exchange (SPDX) group provides a specification
to make it easier for automated tools to detect and summarize well known
opensource licenses. We are gradually adopting the specification, noting
that the tags are considered only advisory and do not, in any way,
superceed or replace the license texts.
2017-11-27 15:20:12 +00:00

366 lines
8.5 KiB
C

/*-
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* Copyright (c) 2003, 2005 Ryuichiro Imura
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/kernel.h>
#include <sys/systm.h>
#include <sys/malloc.h>
#include <sys/iconv.h>
#include "iconv_converter_if.h"
/*
* "XLAT16" converter
*/
#ifdef MODULE_DEPEND
MODULE_DEPEND(iconv_xlat16, libiconv, 2, 2, 2);
#endif
#define C2I1(c) ((c) & 0x8000 ? ((c) & 0xff) | 0x100 : (c) & 0xff)
#define C2I2(c) ((c) & 0x8000 ? ((c) >> 8) & 0x7f : ((c) >> 8) & 0xff)
/*
* XLAT16 converter instance
*/
struct iconv_xlat16 {
KOBJ_FIELDS;
uint32_t * d_table[0x200];
void * f_ctp;
void * t_ctp;
struct iconv_cspair * d_csp;
};
static int
iconv_xlat16_open(struct iconv_converter_class *dcp,
struct iconv_cspair *csp, struct iconv_cspair *cspf, void **dpp)
{
struct iconv_xlat16 *dp;
uint32_t *headp, **idxp;
int i;
dp = (struct iconv_xlat16 *)kobj_create((struct kobj_class*)dcp, M_ICONV, M_WAITOK);
headp = (uint32_t *)((caddr_t)csp->cp_data + sizeof(dp->d_table));
idxp = (uint32_t **)csp->cp_data;
for (i = 0 ; i < 0x200 ; i++) {
if (*idxp) {
dp->d_table[i] = headp;
headp += 0x80;
} else {
dp->d_table[i] = NULL;
}
idxp++;
}
if (strcmp(csp->cp_to, KICONV_WCTYPE_NAME) != 0) {
if (iconv_open(KICONV_WCTYPE_NAME, csp->cp_from, &dp->f_ctp) != 0)
dp->f_ctp = NULL;
if (iconv_open(KICONV_WCTYPE_NAME, csp->cp_to, &dp->t_ctp) != 0)
dp->t_ctp = NULL;
} else {
dp->f_ctp = dp->t_ctp = dp;
}
dp->d_csp = csp;
csp->cp_refcount++;
*dpp = (void*)dp;
return (0);
}
static int
iconv_xlat16_close(void *data)
{
struct iconv_xlat16 *dp = data;
if (dp->f_ctp && dp->f_ctp != data)
iconv_close(dp->f_ctp);
if (dp->t_ctp && dp->t_ctp != data)
iconv_close(dp->t_ctp);
dp->d_csp->cp_refcount--;
kobj_delete((struct kobj*)data, M_ICONV);
return (0);
}
static int
iconv_xlat16_conv(void *d2p, const char **inbuf,
size_t *inbytesleft, char **outbuf, size_t *outbytesleft,
int convchar, int casetype)
{
struct iconv_xlat16 *dp = (struct iconv_xlat16*)d2p;
const char *src;
char *dst;
int nullin, ret = 0;
size_t in, on, ir, or, inlen;
uint32_t code;
u_char u, l;
uint16_t c1, c2, ctmp;
if (inbuf == NULL || *inbuf == NULL || outbuf == NULL || *outbuf == NULL)
return (0);
ir = in = *inbytesleft;
or = on = *outbytesleft;
src = *inbuf;
dst = *outbuf;
while(ir > 0 && or > 0) {
inlen = 0;
code = 0;
c1 = ir > 1 ? *(src+1) & 0xff : 0;
c2 = *src & 0xff;
ctmp = 0;
c1 = c2 & 0x80 ? c1 | 0x100 : c1;
c2 = c2 & 0x80 ? c2 & 0x7f : c2;
if (ir > 1 && dp->d_table[c1] && dp->d_table[c1][c2]) {
/*
* inbuf char is a double byte char
*/
inlen = 2;
/* toupper,tolower */
if (casetype == KICONV_FROM_LOWER && dp->f_ctp)
ctmp = towlower(((u_char)*src << 8) | (u_char)*(src + 1),
dp->f_ctp);
else if (casetype == KICONV_FROM_UPPER && dp->f_ctp)
ctmp = towupper(((u_char)*src << 8) | (u_char)*(src + 1),
dp->f_ctp);
if (ctmp) {
c1 = C2I1(ctmp);
c2 = C2I2(ctmp);
}
}
if (inlen == 0) {
c1 &= 0xff00;
if (!dp->d_table[c1]) {
ret = -1;
break;
}
/*
* inbuf char is a single byte char
*/
inlen = 1;
if (casetype & (KICONV_FROM_LOWER|KICONV_FROM_UPPER))
code = dp->d_table[c1][c2];
if (casetype == KICONV_FROM_LOWER) {
if (dp->f_ctp)
ctmp = towlower((u_char)*src, dp->f_ctp);
else if (code & XLAT16_HAS_FROM_LOWER_CASE)
ctmp = (u_char)(code >> 16);
} else if (casetype == KICONV_FROM_UPPER) {
if (dp->f_ctp)
ctmp = towupper((u_char)*src, dp->f_ctp);
else if (code & XLAT16_HAS_FROM_UPPER_CASE)
ctmp = (u_char)(code >> 16);
}
if (ctmp) {
c1 = C2I1(ctmp << 8);
c2 = C2I2(ctmp << 8);
}
}
code = dp->d_table[c1][c2];
if (!code) {
ret = -1;
break;
}
nullin = (code & XLAT16_ACCEPT_NULL_IN) ? 1 : 0;
if (inlen == 1 && nullin) {
/*
* XLAT16_ACCEPT_NULL_IN requires inbuf has 2byte
*/
ret = -1;
break;
}
/*
* now start translation
*/
u = (u_char)(code >> 8);
l = (u_char)code;
#ifdef XLAT16_ACCEPT_3BYTE_CHR
if (code & XLAT16_IS_3BYTE_CHR) {
if (or < 3) {
ret = -1;
break;
}
*dst++ = u;
*dst++ = l;
*dst++ = (u_char)(code >> 16);
or -= 3;
} else
#endif
if (u || code & XLAT16_ACCEPT_NULL_OUT) {
if (or < 2) {
ret = -1;
break;
}
/* toupper,tolower */
if (casetype == KICONV_LOWER && dp->t_ctp) {
code = towlower((uint16_t)code, dp->t_ctp);
u = (u_char)(code >> 8);
l = (u_char)code;
}
if (casetype == KICONV_UPPER && dp->t_ctp) {
code = towupper((uint16_t)code, dp->t_ctp);
u = (u_char)(code >> 8);
l = (u_char)code;
}
*dst++ = u;
*dst++ = l;
or -= 2;
} else {
/* toupper,tolower */
if (casetype == KICONV_LOWER) {
if (dp->t_ctp)
l = (u_char)towlower(l, dp->t_ctp);
else if (code & XLAT16_HAS_LOWER_CASE)
l = (u_char)(code >> 16);
}
if (casetype == KICONV_UPPER) {
if (dp->t_ctp)
l = (u_char)towupper(l, dp->t_ctp);
else if (code & XLAT16_HAS_UPPER_CASE)
l = (u_char)(code >> 16);
}
*dst++ = l;
or--;
}
if (inlen == 2) {
/*
* there is a case that inbuf char is a single
* byte char while inlen == 2
*/
if ((u_char)*(src+1) == '\0' && !nullin ) {
src++;
ir--;
} else {
src += 2;
ir -= 2;
}
} else {
src++;
ir--;
}
if (convchar == 1)
break;
}
*inbuf += in - ir;
*outbuf += on - or;
*inbytesleft -= in - ir;
*outbytesleft -= on - or;
return (ret);
}
static const char *
iconv_xlat16_name(struct iconv_converter_class *dcp)
{
return ("xlat16");
}
static int
iconv_xlat16_tolower(void *d2p, int c)
{
struct iconv_xlat16 *dp = (struct iconv_xlat16*)d2p;
int c1, c2, out;
if (c < 0x100) {
c1 = C2I1(c << 8);
c2 = C2I2(c << 8);
} else if (c < 0x10000) {
c1 = C2I1(c);
c2 = C2I2(c);
} else
return (c);
if (dp->d_table[c1] && dp->d_table[c1][c2] & XLAT16_HAS_LOWER_CASE) {
/*return (int)(dp->d_table[c1][c2] & 0xffff);*/
out = dp->d_table[c1][c2] & 0xffff;
if ((out & 0xff) == 0)
out = (out >> 8) & 0xff;
return (out);
} else
return (c);
}
static int
iconv_xlat16_toupper(void *d2p, int c)
{
struct iconv_xlat16 *dp = (struct iconv_xlat16*)d2p;
int c1, c2, out;
if (c < 0x100) {
c1 = C2I1(c << 8);
c2 = C2I2(c << 8);
} else if (c < 0x10000) {
c1 = C2I1(c);
c2 = C2I2(c);
} else
return (c);
if (dp->d_table[c1] && dp->d_table[c1][c2] & XLAT16_HAS_UPPER_CASE) {
out = dp->d_table[c1][c2] & 0xffff;
if ((out & 0xff) == 0)
out = (out >> 8) & 0xff;
return (out);
} else
return (c);
}
static kobj_method_t iconv_xlat16_methods[] = {
KOBJMETHOD(iconv_converter_open, iconv_xlat16_open),
KOBJMETHOD(iconv_converter_close, iconv_xlat16_close),
KOBJMETHOD(iconv_converter_conv, iconv_xlat16_conv),
#if 0
KOBJMETHOD(iconv_converter_init, iconv_xlat16_init),
KOBJMETHOD(iconv_converter_done, iconv_xlat16_done),
#endif
KOBJMETHOD(iconv_converter_name, iconv_xlat16_name),
KOBJMETHOD(iconv_converter_tolower, iconv_xlat16_tolower),
KOBJMETHOD(iconv_converter_toupper, iconv_xlat16_toupper),
{0, 0}
};
KICONV_CONVERTER(xlat16, sizeof(struct iconv_xlat16));