375 lines
8.3 KiB
C
375 lines
8.3 KiB
C
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/*-
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* Copyright (c) 2003 Ryuichiro Imura
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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/*
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* kiconv(3) requires shared linked, and reduce module size
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* when statically linked.
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*/
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#ifdef PIC
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#include <sys/types.h>
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#include <sys/iconv.h>
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#include <sys/sysctl.h>
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#include <ctype.h>
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#include <dlfcn.h>
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#include <err.h>
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#include <errno.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "quirks.h"
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typedef void *iconv_t;
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struct xlat16_table {
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uint32_t * idx[0x200];
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void * data;
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size_t size;
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};
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static struct xlat16_table kiconv_xlat16_open(const char *, const char *, int);
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static int my_iconv_init(void);
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static iconv_t (*my_iconv_open)(const char *, const char *);
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static size_t (*my_iconv)(iconv_t, const char **, size_t *, char **, size_t *);
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static int (*my_iconv_close)(iconv_t);
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static size_t my_iconv_char(iconv_t, const u_char **, size_t *, u_char **, size_t *);
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int
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kiconv_add_xlat16_cspair(const char *tocode, const char *fromcode, int flag)
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{
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int error;
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size_t i, size, idxsize;
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struct iconv_cspair_info *csi;
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struct xlat16_table xt;
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void *data, *p;
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if (sysctlbyname("kern.iconv.cslist", NULL, &size, NULL, 0) == -1)
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return (-1);
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if (size > 0) {
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csi = malloc(size);
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if (csi == NULL)
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return (-1);
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if (sysctlbyname("kern.iconv.cslist", csi, &size, NULL, 0) == -1) {
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free(csi);
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return (-1);
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}
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for (i = 0; i < (size/sizeof(*csi)); i++, csi++){
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if (strcmp(csi->cs_to, tocode) == 0 &&
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strcmp(csi->cs_from, fromcode) == 0)
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return (0);
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}
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}
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xt = kiconv_xlat16_open(tocode, fromcode, flag);
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if (xt.size == 0)
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return (-1);
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idxsize = sizeof(xt.idx);
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if ((idxsize + xt.size) > ICONV_CSMAXDATALEN) {
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errno = E2BIG;
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return (-1);
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}
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if ((data = malloc(idxsize + xt.size)) != NULL) {
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p = data;
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memcpy(p, xt.idx, idxsize);
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p += idxsize;
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memcpy(p, xt.data, xt.size);
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error = kiconv_add_xlat16_table(tocode, fromcode, data,
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(int)(idxsize + xt.size));
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return (error);
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}
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return (-1);
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}
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static struct xlat16_table
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kiconv_xlat16_open(const char *tocode, const char *fromcode, int lcase)
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{
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u_char src[3], dst[4], *srcp, *dstp, ud, ld;
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int us, ls, ret;
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uint16_t c;
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uint32_t table[0x80];
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size_t inbytesleft, outbytesleft, pre_q_size, post_q_size;
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struct xlat16_table xt;
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struct quirk_replace_list *pre_q_list, *post_q_list;
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iconv_t cd;
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void *p;
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xt.data = NULL;
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xt.size = 0;
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src[2] = NULL;
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dst[3] = NULL;
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ret = my_iconv_init();
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if (ret)
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return (xt);
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cd = my_iconv_open(search_quirk(tocode, fromcode, &pre_q_list, &pre_q_size),
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search_quirk(fromcode, tocode, &post_q_list, &post_q_size));
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if (cd == (iconv_t) (-1))
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return (xt);
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if ((xt.data = malloc(0x200 * 0x80 * sizeof(uint32_t))) == NULL)
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return (xt);
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p = xt.data;
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for (ls = 0 ; ls < 0x200 ; ls++) {
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xt.idx[ls] = NULL;
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for (us = 0 ; us < 0x80 ; us++) {
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srcp = src;
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dstp = dst;
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inbytesleft = 2;
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outbytesleft = 3;
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bzero(dst, outbytesleft);
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c = ((ls & 0x100 ? us | 0x80 : us) << 8) | (u_char)ls;
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c = quirk_vendor2unix(c, pre_q_list, pre_q_size);
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src[0] = (u_char)(c >> 8);
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src[1] = (u_char)c;
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ret = my_iconv_char(cd, (const u_char **)&srcp,
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&inbytesleft, &dstp, &outbytesleft);
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if (ret == -1) {
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table[us] = 0;
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continue;
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}
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ud = (u_char)dst[0];
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ld = (u_char)dst[1];
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switch(outbytesleft) {
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case 0:
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#ifdef XLAT16_ACCEPT_3BYTE_CHR
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table[us] = (ud << 8) | ld;
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table[us] |= (u_char)dst[2] << 16;
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table[us] |= XLAT16_IS_3BYTE_CHR;
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#else
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table[us] = 0;
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continue;
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#endif
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break;
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case 1:
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table[us] = quirk_unix2vendor((ud << 8) | ld,
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post_q_list, post_q_size);
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if ((table[us] >> 8) == 0)
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table[us] |= XLAT16_ACCEPT_NULL_OUT;
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break;
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case 2:
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table[us] = ud;
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if (lcase & KICONV_LOWER && ud != tolower(ud)) {
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table[us] |= (u_char)tolower(ud) << 16;
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table[us] |= XLAT16_HAS_LOWER_CASE;
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}
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if (lcase & KICONV_UPPER && ud != toupper(ud)) {
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table[us] |= (u_char)toupper(ud) << 16;
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table[us] |= XLAT16_HAS_UPPER_CASE;
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}
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break;
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}
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switch(inbytesleft) {
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case 0:
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if ((ls & 0xff) == 0)
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table[us] |= XLAT16_ACCEPT_NULL_IN;
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break;
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case 1:
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c = ls > 0xff ? us | 0x80 : us;
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if (lcase & KICONV_FROM_LOWER && c != tolower(c)) {
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table[us] |= (u_char)tolower(c) << 16;
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table[us] |= XLAT16_HAS_FROM_LOWER_CASE;
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}
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if (lcase & KICONV_FROM_UPPER && c != toupper(c)) {
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table[us] |= (u_char)toupper(c) << 16;
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table[us] |= XLAT16_HAS_FROM_UPPER_CASE;
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}
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break;
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}
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if (table[us] == 0)
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continue;
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/*
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* store not NULL
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*/
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xt.idx[ls] = table;
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}
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if (xt.idx[ls]) {
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memcpy(p, table, sizeof(table));
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p += sizeof(table);
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}
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}
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my_iconv_close(cd);
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xt.size = p - xt.data;
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xt.data = realloc(xt.data, xt.size);
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return (xt);
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}
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static int
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my_iconv_init(void)
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{
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void *iconv_lib;
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iconv_lib = dlopen("libiconv.so", RTLD_LAZY | RTLD_GLOBAL);
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if (iconv_lib == NULL) {
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warn("Unable to load iconv library: %s\n", dlerror());
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errno = ENOENT;
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return (-1);
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}
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my_iconv_open = dlsym(iconv_lib, "iconv_open");
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my_iconv = dlsym(iconv_lib, "iconv");
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my_iconv_close = dlsym(iconv_lib, "iconv_close");
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return (0);
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}
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static size_t
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my_iconv_char(iconv_t cd, const u_char **ibuf, size_t * ilen, u_char **obuf,
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size_t * olen)
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{
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const u_char *sp;
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u_char *dp, ilocal[3], olocal[3];
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u_char c1, c2;
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int ret;
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size_t ir, or;
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sp = *ibuf;
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dp = *obuf;
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ir = *ilen;
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bzero(*obuf, *olen);
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ret = my_iconv(cd, (const char **)&sp, ilen, (char **)&dp, olen);
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c1 = (*obuf)[0];
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c2 = (*obuf)[1];
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if (ret == -1) {
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if (*ilen == ir - 1 && (*ibuf)[1] == '\0' && (c1 || c2))
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return (0);
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else
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return (-1);
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}
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/*
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* We must judge if inbuf is a single byte char or double byte char.
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* Here, to judge, try first byte(*sp) conversion and compare.
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*/
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ir = 1;
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or = 3;
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bzero(olocal, or);
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memcpy(ilocal, *ibuf, sizeof(ilocal));
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sp = ilocal;
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dp = olocal;
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if ((my_iconv(cd,(const char **)&sp, &ir, (char **)&dp, &or)) != -1) {
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if (olocal[0] != c1)
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return (ret);
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if (olocal[1] == c2 && (*ibuf)[1] == '\0') {
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/*
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* inbuf is a single byte char
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*/
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*ilen = 1;
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*olen = or;
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return (ret);
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}
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switch(or) {
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case 0:
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case 1:
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if (olocal[1] == c2) {
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/*
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* inbuf is a single byte char,
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* so return false here.
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*/
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return (-1);
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} else {
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/*
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* inbuf is a double byte char
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*/
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return (ret);
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}
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break;
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case 2:
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/*
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* should compare second byte of inbuf
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*/
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break;
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}
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} else {
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/*
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* inbuf clould not be splitted, so inbuf is
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* a double byte char.
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*/
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return (ret);
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}
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/*
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* try second byte(*(sp+1)) conversion, and compare
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*/
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ir = 1;
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or = 3;
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bzero(olocal, or);
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sp = ilocal + 1;
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dp = olocal;
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if ((my_iconv(cd,(const char **)&sp, &ir, (char **)&dp, &or)) != -1) {
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if (olocal[0] == c2)
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/*
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* inbuf is a single byte char
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*/
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return (-1);
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}
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return (ret);
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}
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#else /* statically linked */
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#include <errno.h>
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int
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kiconv_add_xlat16_cspair(const char *tocode, const char *fromcode, int flag)
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{
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errno = EINVAL;
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return (-1);
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}
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#endif /* PIC */
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