6ac937c89c
possible to do tolower/toupper independently without code conversion. Submitted by: imura (but bugs are mine) Obtained from: http://people.freebsd.org/~imura/kiconv/ (1_kiconv_wctype_kern.diff, 1_kiconv_wctype_user.diff)
364 lines
8.4 KiB
C
364 lines
8.4 KiB
C
/*-
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* Copyright (c) 2003, 2005 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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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/kernel.h>
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#include <sys/systm.h>
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#include <sys/malloc.h>
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#include <sys/iconv.h>
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#include "iconv_converter_if.h"
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/*
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* "XLAT16" converter
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*/
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#ifdef MODULE_DEPEND
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MODULE_DEPEND(iconv_xlat16, libiconv, 2, 2, 2);
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#endif
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#define C2I1(c) ((c) & 0x8000 ? ((c) & 0xff) | 0x100 : (c) & 0xff)
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#define C2I2(c) ((c) & 0x8000 ? ((c) >> 8) & 0x7f : ((c) >> 8) & 0xff)
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/*
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* XLAT16 converter instance
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*/
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struct iconv_xlat16 {
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KOBJ_FIELDS;
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uint32_t * d_table[0x200];
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void * f_ctp;
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void * t_ctp;
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struct iconv_cspair * d_csp;
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};
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static int
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iconv_xlat16_open(struct iconv_converter_class *dcp,
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struct iconv_cspair *csp, struct iconv_cspair *cspf, void **dpp)
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{
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struct iconv_xlat16 *dp;
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uint32_t *headp, **idxp;
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int i;
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dp = (struct iconv_xlat16 *)kobj_create((struct kobj_class*)dcp, M_ICONV, M_WAITOK);
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headp = (uint32_t *)((caddr_t)csp->cp_data + sizeof(dp->d_table));
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idxp = (uint32_t **)csp->cp_data;
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for (i = 0 ; i < 0x200 ; i++) {
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if (*idxp) {
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dp->d_table[i] = headp;
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headp += 0x80;
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} else {
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dp->d_table[i] = NULL;
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}
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idxp++;
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}
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if (strcmp(csp->cp_to, KICONV_WCTYPE_NAME) != 0) {
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if (iconv_open(KICONV_WCTYPE_NAME, csp->cp_from, &dp->f_ctp) != 0)
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dp->f_ctp = NULL;
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if (iconv_open(KICONV_WCTYPE_NAME, csp->cp_to, &dp->t_ctp) != 0)
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dp->t_ctp = NULL;
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} else {
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dp->f_ctp = dp->t_ctp = dp;
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}
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dp->d_csp = csp;
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csp->cp_refcount++;
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*dpp = (void*)dp;
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return (0);
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}
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static int
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iconv_xlat16_close(void *data)
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{
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struct iconv_xlat16 *dp = data;
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if (dp->f_ctp && dp->f_ctp != data)
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iconv_close(dp->f_ctp);
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if (dp->t_ctp && dp->t_ctp != data)
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iconv_close(dp->t_ctp);
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dp->d_csp->cp_refcount--;
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kobj_delete((struct kobj*)data, M_ICONV);
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return (0);
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}
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static int
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iconv_xlat16_conv(void *d2p, const char **inbuf,
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size_t *inbytesleft, char **outbuf, size_t *outbytesleft,
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int convchar, int casetype)
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{
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struct iconv_xlat16 *dp = (struct iconv_xlat16*)d2p;
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const char *src;
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char *dst;
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int nullin, ret = 0;
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size_t in, on, ir, or, inlen;
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uint32_t code;
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u_char u, l;
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uint16_t c1, c2, ctmp;
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if (inbuf == NULL || *inbuf == NULL || outbuf == NULL || *outbuf == NULL)
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return (0);
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ir = in = *inbytesleft;
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or = on = *outbytesleft;
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src = *inbuf;
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dst = *outbuf;
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while(ir > 0 && or > 0) {
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inlen = 0;
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code = 0;
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c1 = ir > 1 ? *(src+1) & 0xff : 0;
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c2 = *src & 0xff;
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ctmp = 0;
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c1 = c2 & 0x80 ? c1 | 0x100 : c1;
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c2 = c2 & 0x80 ? c2 & 0x7f : c2;
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if (ir > 1 && dp->d_table[c1] && dp->d_table[c1][c2]) {
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/*
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* inbuf char is a double byte char
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*/
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inlen = 2;
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/* toupper,tolower */
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if (casetype == KICONV_FROM_LOWER && dp->f_ctp)
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ctmp = towlower(((u_char)*src << 8) | (u_char)*(src + 1),
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dp->f_ctp);
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else if (casetype == KICONV_FROM_UPPER && dp->f_ctp)
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ctmp = towupper(((u_char)*src << 8) | (u_char)*(src + 1),
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dp->f_ctp);
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if (ctmp) {
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c1 = C2I1(ctmp);
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c2 = C2I2(ctmp);
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}
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}
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if (inlen == 0) {
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c1 &= 0xff00;
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if (!dp->d_table[c1]) {
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ret = -1;
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break;
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}
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/*
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* inbuf char is a single byte char
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*/
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inlen = 1;
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if (casetype & (KICONV_FROM_LOWER|KICONV_FROM_UPPER))
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code = dp->d_table[c1][c2];
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if (casetype == KICONV_FROM_LOWER) {
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if (dp->f_ctp)
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ctmp = towlower((u_char)*src, dp->f_ctp);
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else if (code & XLAT16_HAS_FROM_LOWER_CASE)
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ctmp = (u_char)(code >> 16);
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} else if (casetype == KICONV_FROM_UPPER) {
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if (dp->f_ctp)
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ctmp = towupper((u_char)*src, dp->f_ctp);
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else if (code & XLAT16_HAS_FROM_UPPER_CASE)
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ctmp = (u_char)(code >> 16);
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}
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if (ctmp) {
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c1 = C2I1(ctmp << 8);
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c2 = C2I2(ctmp << 8);
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}
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}
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code = dp->d_table[c1][c2];
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if (!code) {
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ret = -1;
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break;
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}
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nullin = (code & XLAT16_ACCEPT_NULL_IN) ? 1 : 0;
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if (inlen == 1 && nullin) {
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/*
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* XLAT16_ACCEPT_NULL_IN requires inbuf has 2byte
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*/
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ret = -1;
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break;
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}
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/*
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* now start translation
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*/
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u = (u_char)(code >> 8);
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l = (u_char)code;
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#ifdef XLAT16_ACCEPT_3BYTE_CHR
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if (code & XLAT16_IS_3BYTE_CHR) {
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if (or < 3) {
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ret = -1;
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break;
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}
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*dst++ = u;
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*dst++ = l;
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*dst++ = (u_char)(code >> 16);
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or -= 3;
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} else
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#endif
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if (u || code & XLAT16_ACCEPT_NULL_OUT) {
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if (or < 2) {
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ret = -1;
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break;
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}
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/* toupper,tolower */
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if (casetype == KICONV_LOWER && dp->t_ctp) {
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code = towlower((uint16_t)code, dp->t_ctp);
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u = (u_char)(code >> 8);
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l = (u_char)code;
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}
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if (casetype == KICONV_UPPER && dp->t_ctp) {
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code = towupper((uint16_t)code, dp->t_ctp);
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u = (u_char)(code >> 8);
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l = (u_char)code;
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}
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*dst++ = u;
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*dst++ = l;
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or -= 2;
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} else {
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/* toupper,tolower */
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if (casetype == KICONV_LOWER) {
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if (dp->t_ctp)
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l = (u_char)towlower(l, dp->t_ctp);
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else if (code & XLAT16_HAS_LOWER_CASE)
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l = (u_char)(code >> 16);
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}
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if (casetype == KICONV_UPPER) {
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if (dp->t_ctp)
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l = (u_char)towupper(l, dp->t_ctp);
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else if (code & XLAT16_HAS_UPPER_CASE)
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l = (u_char)(code >> 16);
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}
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*dst++ = l;
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or--;
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}
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if (inlen == 2) {
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/*
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* there is a case that inbuf char is a single
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* byte char while inlen == 2
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*/
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if ((u_char)*(src+1) == 0 && !nullin ) {
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src++;
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ir--;
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} else {
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src += 2;
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ir -= 2;
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}
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} else {
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src++;
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ir--;
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}
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if (convchar == 1)
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break;
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}
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*inbuf += in - ir;
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*outbuf += on - or;
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*inbytesleft -= in - ir;
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*outbytesleft -= on - or;
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return (ret);
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}
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static const char *
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iconv_xlat16_name(struct iconv_converter_class *dcp)
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{
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return ("xlat16");
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}
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static int
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iconv_xlat16_tolower(void *d2p, register int c)
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{
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struct iconv_xlat16 *dp = (struct iconv_xlat16*)d2p;
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register int c1, c2, out;
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if (c < 0x100) {
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c1 = C2I1(c << 8);
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c2 = C2I2(c << 8);
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} else if (c < 0x10000) {
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c1 = C2I1(c);
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c2 = C2I2(c);
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} else
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return (c);
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if (dp->d_table[c1] && dp->d_table[c1][c2] & XLAT16_HAS_LOWER_CASE) {
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/*return (int)(dp->d_table[c1][c2] & 0xffff);*/
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out = dp->d_table[c1][c2] & 0xffff;
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if ((out & 0xff) == 0)
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out = (out >> 8) & 0xff;
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return (out);
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} else
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return (c);
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}
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static int
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iconv_xlat16_toupper(void *d2p, register int c)
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{
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struct iconv_xlat16 *dp = (struct iconv_xlat16*)d2p;
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register int c1, c2, out;
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if (c < 0x100) {
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c1 = C2I1(c << 8);
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c2 = C2I2(c << 8);
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} else if (c < 0x10000) {
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c1 = C2I1(c);
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c2 = C2I2(c);
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} else
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return (c);
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if (dp->d_table[c1] && dp->d_table[c1][c2] & XLAT16_HAS_UPPER_CASE) {
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out = dp->d_table[c1][c2] & 0xffff;
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if ((out & 0xff) == 0)
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out = (out >> 8) & 0xff;
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return (out);
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} else
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return (c);
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}
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static kobj_method_t iconv_xlat16_methods[] = {
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KOBJMETHOD(iconv_converter_open, iconv_xlat16_open),
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KOBJMETHOD(iconv_converter_close, iconv_xlat16_close),
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KOBJMETHOD(iconv_converter_conv, iconv_xlat16_conv),
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#if 0
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KOBJMETHOD(iconv_converter_init, iconv_xlat16_init),
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KOBJMETHOD(iconv_converter_done, iconv_xlat16_done),
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#endif
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KOBJMETHOD(iconv_converter_name, iconv_xlat16_name),
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KOBJMETHOD(iconv_converter_tolower, iconv_xlat16_tolower),
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KOBJMETHOD(iconv_converter_toupper, iconv_xlat16_toupper),
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{0, 0}
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};
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KICONV_CONVERTER(xlat16, sizeof(struct iconv_xlat16));
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