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/* -*- mode: c -*-
*
* $Id: iconv_hook_eucjp.c,v 1.4 2002/06/10 13:57:52 tai Exp $
* 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"
#define SS2 (0x8E)
#define SS3 (0x8F)
#define is_ascii(c) \
((unsigned char) (c) < 0x80) /* ISO 646 */
#define is_kanji(c) \
((unsigned char) (c) > 0x9F) /* JIS X 0208 */
#define is_hankana(c) \
((unsigned char) (c) == SS2) /* JIS X 0201 */
#define is_hojyo(c) \
((unsigned char) (c) == SS3) /* JIS X 0212 */
size_t mssjis_iconv(iconv_t cd,
char **srcbuf, size_t *srclen, char **outbuf, size_t *outlen);
static size_t skip_bytes(char c)
{
if (is_ascii(c)) {
return 1;
} else if (is_kanji(c) || is_hankana(c)) {
return 2;
} else if (is_hojyo(c)) {
return 3;
}
return 0;
}
/*
* 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
eucjp_iconv_open(const char *oenc, const char *ienc) {
if( ((strncmp(ienc,"EUC-JP",6) == 0) || (strncmp(ienc,"UJIS",4) == 0)
|| (strncmp(ienc,"EUCJP",5) == 0)) && (strncmp(oenc,"UTF-8",5) == 0) )
{
return (iconv_t)1;
}
else
{
return (iconv_t)-1;
}
}
/*
* 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
eucjp_iconv_close(iconv_t cd) {
return 0;
}
/* eucjp_iconv()
* by KAJIKI Yoshihiro <kajiki@ylug.org>
* EUC-JP code to UTF-8 via Microsoft ShiftJIS using mssjis_iconv().
* This is experimental code for processing EUC-JP.
*/
static size_t
eucjp_iconv(iconv_t cd,
char **srcbuf, size_t *srclen, char **outbuf, size_t *outlen) {
unsigned char *tmpbuf, *tmp;
unsigned char *src;
unsigned char ch, cl;
size_t ret;
if (! (srcbuf && srclen && outbuf && outlen))
return 0;
/* translate EUC-JP into SJIS */
src = (unsigned char *)*srcbuf;
tmp = tmpbuf = malloc(*srclen+2);
while (*src && ((tmp - tmpbuf) < *srclen)) {
ch = *src++;
if (is_ascii(ch)) {
*tmp++ = ch;
} else {
cl = *src++;
if (is_kanji(ch)) {
*tmp++ = ((ch-0x5f)/2) ^ 0xA0;
if (!(ch&1))
*tmp++ = cl - 0x02;
else if (cl < 0xE0)
*tmp++ = cl - 0x61;
else
*tmp++ = cl - 0x60;
} else if (is_hankana(ch)) {
if (cl < 0xA0 || cl > 0xDF) {
*srcbuf=(char *)(src-2);
errno=EILSEQ;
return -1;
}
*tmp++ = cl;
} else {
/* We don't support JIS X 0212 */
*srcbuf=(char *)(src-2);
errno=EILSEQ;
return -1;
}
}
}
*tmp='\0';
ret = mssjis_iconv(cd, (char **) &tmpbuf, srclen, outbuf, outlen);
free(tmpbuf);
*srcbuf += *src;
*srclen = 0;
return ret;
}
static iconv_hook_module iconv_hook_eucjp = {
eucjp_iconv,
eucjp_iconv_open,
eucjp_iconv_close,
};
iconv_hook_module *
iconv_hook_eucjp_init(void) {
return &iconv_hook_eucjp;
}
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