FreeBSD-5.3/lib/libkiconv/xlat16_iconv.c
/*-
* Copyright (c) 2003 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.
*
* $FreeBSD: src/lib/libkiconv/xlat16_iconv.c,v 1.3 2004/03/14 05:14:00 bde Exp $
*/
/*
* kiconv(3) requires shared linked, and reduce module size
* when statically linked.
*/
#ifdef PIC
#include <sys/types.h>
#include <sys/iconv.h>
#include <sys/sysctl.h>
#include <ctype.h>
#include <dlfcn.h>
#include <err.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "quirks.h"
typedef void *iconv_t;
struct xlat16_table {
uint32_t * idx[0x200];
void * data;
size_t size;
};
static struct xlat16_table kiconv_xlat16_open(const char *, const char *, int);
static int my_iconv_init(void);
static iconv_t (*my_iconv_open)(const char *, const char *);
static size_t (*my_iconv)(iconv_t, const char **, size_t *, char **, size_t *);
static int (*my_iconv_close)(iconv_t);
static size_t my_iconv_char(iconv_t, const u_char **, size_t *, u_char **, size_t *);
int
kiconv_add_xlat16_cspair(const char *tocode, const char *fromcode, int flag)
{
int error;
size_t i, size, idxsize;
struct iconv_cspair_info *csi;
struct xlat16_table xt;
void *data, *p;
if (sysctlbyname("kern.iconv.cslist", NULL, &size, NULL, 0) == -1)
return (-1);
if (size > 0) {
csi = malloc(size);
if (csi == NULL)
return (-1);
if (sysctlbyname("kern.iconv.cslist", csi, &size, NULL, 0) == -1) {
free(csi);
return (-1);
}
for (i = 0; i < (size/sizeof(*csi)); i++, csi++){
if (strcmp(csi->cs_to, tocode) == 0 &&
strcmp(csi->cs_from, fromcode) == 0)
return (0);
}
}
xt = kiconv_xlat16_open(tocode, fromcode, flag);
if (xt.size == 0)
return (-1);
idxsize = sizeof(xt.idx);
if ((idxsize + xt.size) > ICONV_CSMAXDATALEN) {
errno = E2BIG;
return (-1);
}
if ((data = malloc(idxsize + xt.size)) != NULL) {
p = data;
memcpy(p, xt.idx, idxsize);
p += idxsize;
memcpy(p, xt.data, xt.size);
error = kiconv_add_xlat16_table(tocode, fromcode, data,
(int)(idxsize + xt.size));
return (error);
}
return (-1);
}
int
kiconv_add_xlat16_cspairs(const char *foreigncode, const char *localcode)
{
int error;
error = kiconv_add_xlat16_cspair(foreigncode, localcode,
KICONV_FROM_LOWER | KICONV_FROM_UPPER);
if (error)
return (error);
error = kiconv_add_xlat16_cspair(localcode, foreigncode,
KICONV_LOWER | KICONV_UPPER);
if (error)
return (error);
return (0);
}
static struct xlat16_table
kiconv_xlat16_open(const char *tocode, const char *fromcode, int lcase)
{
u_char src[3], dst[4], *srcp, *dstp, ud, ld;
int us, ls, ret;
uint16_t c;
uint32_t table[0x80];
size_t inbytesleft, outbytesleft, pre_q_size, post_q_size;
struct xlat16_table xt;
struct quirk_replace_list *pre_q_list, *post_q_list;
iconv_t cd;
void *p;
xt.data = NULL;
xt.size = 0;
src[2] = '\0';
dst[3] = '\0';
ret = my_iconv_init();
if (ret)
return (xt);
cd = my_iconv_open(search_quirk(tocode, fromcode, &pre_q_list, &pre_q_size),
search_quirk(fromcode, tocode, &post_q_list, &post_q_size));
if (cd == (iconv_t) (-1))
return (xt);
if ((xt.data = malloc(0x200 * 0x80 * sizeof(uint32_t))) == NULL)
return (xt);
p = xt.data;
for (ls = 0 ; ls < 0x200 ; ls++) {
xt.idx[ls] = NULL;
for (us = 0 ; us < 0x80 ; us++) {
srcp = src;
dstp = dst;
inbytesleft = 2;
outbytesleft = 3;
bzero(dst, outbytesleft);
c = ((ls & 0x100 ? us | 0x80 : us) << 8) | (u_char)ls;
c = quirk_vendor2unix(c, pre_q_list, pre_q_size);
src[0] = (u_char)(c >> 8);
src[1] = (u_char)c;
ret = my_iconv_char(cd, (const u_char **)&srcp,
&inbytesleft, &dstp, &outbytesleft);
if (ret == -1) {
table[us] = 0;
continue;
}
ud = (u_char)dst[0];
ld = (u_char)dst[1];
switch(outbytesleft) {
case 0:
#ifdef XLAT16_ACCEPT_3BYTE_CHR
table[us] = (ud << 8) | ld;
table[us] |= (u_char)dst[2] << 16;
table[us] |= XLAT16_IS_3BYTE_CHR;
#else
table[us] = 0;
continue;
#endif
break;
case 1:
table[us] = quirk_unix2vendor((ud << 8) | ld,
post_q_list, post_q_size);
if ((table[us] >> 8) == 0)
table[us] |= XLAT16_ACCEPT_NULL_OUT;
break;
case 2:
table[us] = ud;
if (lcase & KICONV_LOWER && ud != tolower(ud)) {
table[us] |= (u_char)tolower(ud) << 16;
table[us] |= XLAT16_HAS_LOWER_CASE;
}
if (lcase & KICONV_UPPER && ud != toupper(ud)) {
table[us] |= (u_char)toupper(ud) << 16;
table[us] |= XLAT16_HAS_UPPER_CASE;
}
break;
}
switch(inbytesleft) {
case 0:
if ((ls & 0xff) == 0)
table[us] |= XLAT16_ACCEPT_NULL_IN;
break;
case 1:
c = ls > 0xff ? us | 0x80 : us;
if (lcase & KICONV_FROM_LOWER && c != tolower(c)) {
table[us] |= (u_char)tolower(c) << 16;
table[us] |= XLAT16_HAS_FROM_LOWER_CASE;
}
if (lcase & KICONV_FROM_UPPER && c != toupper(c)) {
table[us] |= (u_char)toupper(c) << 16;
table[us] |= XLAT16_HAS_FROM_UPPER_CASE;
}
break;
}
if (table[us] == 0)
continue;
/*
* store not NULL
*/
xt.idx[ls] = table;
}
if (xt.idx[ls]) {
memcpy(p, table, sizeof(table));
p += sizeof(table);
}
}
my_iconv_close(cd);
xt.size = p - xt.data;
xt.data = realloc(xt.data, xt.size);
return (xt);
}
static int
my_iconv_init(void)
{
void *iconv_lib;
iconv_lib = dlopen("libiconv.so", RTLD_LAZY | RTLD_GLOBAL);
if (iconv_lib == NULL) {
warn("Unable to load iconv library: %s\n", dlerror());
errno = ENOENT;
return (-1);
}
my_iconv_open = dlsym(iconv_lib, "iconv_open");
my_iconv = dlsym(iconv_lib, "iconv");
my_iconv_close = dlsym(iconv_lib, "iconv_close");
return (0);
}
static size_t
my_iconv_char(iconv_t cd, const u_char **ibuf, size_t * ilen, u_char **obuf,
size_t * olen)
{
const u_char *sp;
u_char *dp, ilocal[3], olocal[3];
u_char c1, c2;
int ret;
size_t ir, or;
sp = *ibuf;
dp = *obuf;
ir = *ilen;
bzero(*obuf, *olen);
ret = my_iconv(cd, (const char **)&sp, ilen, (char **)&dp, olen);
c1 = (*obuf)[0];
c2 = (*obuf)[1];
if (ret == -1) {
if (*ilen == ir - 1 && (*ibuf)[1] == '\0' && (c1 || c2))
return (0);
else
return (-1);
}
/*
* We must judge if inbuf is a single byte char or double byte char.
* Here, to judge, try first byte(*sp) conversion and compare.
*/
ir = 1;
or = 3;
bzero(olocal, or);
memcpy(ilocal, *ibuf, sizeof(ilocal));
sp = ilocal;
dp = olocal;
if ((my_iconv(cd,(const char **)&sp, &ir, (char **)&dp, &or)) != -1) {
if (olocal[0] != c1)
return (ret);
if (olocal[1] == c2 && (*ibuf)[1] == '\0') {
/*
* inbuf is a single byte char
*/
*ilen = 1;
*olen = or;
return (ret);
}
switch(or) {
case 0:
case 1:
if (olocal[1] == c2) {
/*
* inbuf is a single byte char,
* so return false here.
*/
return (-1);
} else {
/*
* inbuf is a double byte char
*/
return (ret);
}
break;
case 2:
/*
* should compare second byte of inbuf
*/
break;
}
} else {
/*
* inbuf clould not be splitted, so inbuf is
* a double byte char.
*/
return (ret);
}
/*
* try second byte(*(sp+1)) conversion, and compare
*/
ir = 1;
or = 3;
bzero(olocal, or);
sp = ilocal + 1;
dp = olocal;
if ((my_iconv(cd,(const char **)&sp, &ir, (char **)&dp, &or)) != -1) {
if (olocal[0] == c2)
/*
* inbuf is a single byte char
*/
return (-1);
}
return (ret);
}
#else /* statically linked */
#include <errno.h>
int
kiconv_add_xlat16_cspair(const char *tocode, const char *fromcode, int flag)
{
errno = EINVAL;
return (-1);
}
int
kiconv_add_xlat16_cspairs(const char *tocode, const char *fromcode)
{
errno = EINVAL;
return (-1);
}
#endif /* PIC */