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/* -*- mode: c -*-
*
* $Id: iconv_hook_utf8_eucjp.c,v 1.2 2002/06/10 13:24:49 tai Exp $
* Framework Author: Taisuke Yamada (tai@iij.ad.jp)
* Logic Composer: Kunio Miyamoto (wakatono@todo.gr.jp)
* Author: KAJIKI Yoshihiro <kajiki@ylug.org>
* based on the 'iconv_hook_mssjis.c' by Kunio Miyamoto (wakatono@todo.gr.jp)
*/
#include <sys/types.h>
#include <string.h>
#include <dirent.h>
#include <unistd.h>
#include <errno.h>
#include "iconv_hook.h"
size_t ucs2_cp932(unsigned char ucs_1, unsigned char ucs_2,
unsigned char *cp932_1, unsigned char *cp932_2);
/*
* utf8_eucjp_iconv_open()
* by Kunio Miyamoto (wakatono@todo.gr.jp)
* and KAJIKI Yoshihiro <kajiki@ylug.org>
* This code is for iconv() interface compatibility.
* and processes nothing but returns normal return code(fixes to 1).
*/
static iconv_t
utf8_eucjp_iconv_open(const char *oenc, const char *ienc) {
if( (strncmp(ienc,"UTF-8",5) == 0)
&& ((strncmp(oenc,"EUC-JP",6) == 0) || (strncmp(oenc,"UJIS",4) == 0)
|| (strncmp(oenc,"EUCJP",5) == 0)) )
{
return (iconv_t)1;
}
else
{
return (iconv_t)-1;
}
}
/*
* utf8_eucjp_iconv_close()
* by Kunio Miyamoto (wakatono@todo.gr.jp)
* and KAJIKI Yoshihiro <kajiki@ylug.org>
* This code is for iconv() interface compatibility.
* and processes nothing but returns normal return code(fixes to 1).
*/
static int
utf8_eucjp_iconv_close(iconv_t cd) {
return 0;
}
/*
* utf8_eucjp_iconv()
* by KAJIKI Yoshihiro <kajiki@ylug.org>
* Unicode UTF-8 to EUC-JP for Microsoft Codepage 932
*/
static size_t
utf8_eucjp_iconv(iconv_t cd,
char **srcbuf, size_t *srclen, char **outbuf, size_t *outlen) {
unsigned char *src, *dst;
unsigned char ucs_1, ucs_2, cp932_1, cp932_2;
size_t len, byte;
if (! (srclen)) return 0;
if (! (outlen) || outbuf == NULL || *outbuf == NULL) {
errno=E2BIG;
return -1;
}
if (srcbuf == NULL || *srcbuf == NULL) return 0;
src = (unsigned char *)*srcbuf;
dst = (unsigned char *)*outbuf;
while ((*srclen > 0) && (*outlen > 0)) {
if (((*src & 0xe0) == 0xe0) && ((*src & 0x10) == 0)) {
byte = 3;
ucs_1 = (*src++ & 0xf) << 4;
ucs_1 |= ((*src & 0x3c) >> 2);
ucs_2 = (*src++ & 0x3) << 6;
ucs_2 |= (*src++ & 0x3f);
} else if (((*src & 0xc0) == 0xc0) && ((*src & 0x20) == 0)) {
byte = 2;
ucs_1 = (*src & 0x1c) >> 2;
ucs_2 = (*src++ & 0x30) << 2;
ucs_2 |= (*src++ & 0x3f);
} else if ((*src & 0x80) && ((*src & 0x40) == 0)) {
*srcbuf=(char *)(src-1);
errno=EILSEQ;
return -1;
} else {
byte = 1;
ucs_1 = 0;
ucs_2 = (*src++ & 0x7f);
}
len = ucs2_cp932(ucs_1, ucs_2, &cp932_1, &cp932_2);
if (len == -1) {
*srcbuf=(char *)(src-byte);
errno=EILSEQ;
return -1;
}
*srclen-=byte;
/* Translate Shift_JIS into EUC-JP */
if (len == 1) {
if (cp932_2 & 0x80) {
*dst++ = 0x8e;
*outlen-=1;
}
*dst++ = cp932_2;
*outlen-=1;
} else {
cp932_1 = (cp932_1^0xa0)*2 + 0x5f;
if (cp932_2 > 0x9e) cp932_1++;
if (cp932_2 < 0x7f) cp932_2 += 0x61;
else if (cp932_2 < 0x9f) cp932_2 += 0x60;
else cp932_2 += 0x2;
*dst++ = cp932_1;
*dst++ = cp932_2;
*outlen-=2;
}
}
*srcbuf=(char *)src;
*outbuf=(char *)dst;
if (! (*outlen)) *dst++='\0';
if (! (*srclen)) return 0;
errno=E2BIG;
return -1;
}
static iconv_hook_module iconv_hook_utf8_eucjp = {
utf8_eucjp_iconv,
utf8_eucjp_iconv_open,
utf8_eucjp_iconv_close,
};
iconv_hook_module *
iconv_hook_utf8_eucjp_init(void) {
return &iconv_hook_utf8_eucjp;
}
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