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#ifdef EXP_CHARTRANS
#include "HTUtils.h"
#include "tcp.h"
#include "HTCJK.h"
#include "UCDefs.h"
#include "HTStream.h"
#include "UCAux.h"
extern HTCJKlang HTCJK;
extern LYUCcharset LYCharSet_UC[];
PUBLIC BOOL UCCanUniTranslateFrom ARGS1(int, from)
{
if (from < 0)
return NO;
if (LYCharSet_UC[from].enc == UCT_ENC_7BIT ||
LYCharSet_UC[from].enc == UCT_ENC_UTF8)
return YES;
if (LYCharSet_UC[from].codepoints & (UCT_CP_SUBSETOF_LAT1))
return YES;
return (LYCharSet_UC[from].UChndl >= 0);
}
PUBLIC BOOL UCCanTranslateUniTo ARGS1(int, to)
{
if (to < 0)
return NO;
return YES; /* well at least some characters... */
}
PUBLIC BOOL UCCanTranslateFromTo ARGS2(int, from, int, to)
{
if (from==to)
return YES;
if (from < 0 || to < 0)
return NO;
if (from==0)
return UCCanTranslateUniTo(to);
if (to==0)
return UCCanUniTranslateFrom(from);
if (LYCharSet_UC[to].enc == UCT_ENC_UTF8) {
return (LYCharSet_UC[from].UChndl >= 0);
}
{
char * fromname = LYCharSet_UC[from].MIMEname;
char * toname = LYCharSet_UC[to].MIMEname;
if (0==strcmp(fromname,"x-transparent") ||
0==strcmp(toname,"x-transparent")) {
return YES;
}
if (LYCharSet_UC[from].enc == UCT_ENC_CJK) {
if (HTCJK == NOCJK) /* use that global flag, for now */
return NO;
if (HTCJK == JAPANESE && (
0==strcmp(fromname,"euc-jp") ||
0==strncmp(fromname,"iso-2022-jp",11) ||
0==strcmp(fromname,"shift_jis")
))
return YES;
return NO; /* if not handled by (from==to) above */
}
if (0==strcmp(fromname,"koi8-r")) {
/* will try to uses stripping of high bit... */
return YES;
}
if (0==strcmp(fromname,"koi8-r") || /* from cyrillic */
0==strcmp(fromname,"iso-8859-5") ||
0==strcmp(fromname,"koi-8")) {
if (0!=strcmp(toname,"iso-8859-5") &&
0!=strcmp(toname,"koi8-r") &&
0!=strcmp(toname,"iso-8859-2"))
return NO;
}
}
return (LYCharSet_UC[from].UChndl >= 0);
}
/* The idea here is that any stage of the stream pipe which is interested
** in some charset dependent processing will call this function.
** Given input and ouptput charsets, this function will set various flags
** in a UCTransParams structure that _suggest_ to the caller what to do.
**
** Should be called once when a stage starts processing text (and the
** input and output charsets are known), or whenever one of input or
** output charsets has changed (e.g. by SGML.c stage after HTML.c stage
** has processed a META tag).
** The global flags (LYRawMode, HTPassEightBitRaw etc.) are currently
** not taken into account here, it's still up to the caller to do something
** about them.
*/
PUBLIC void UCSetTransParams ARGS5(
UCTransParams *, pT,
int, cs_in,
CONST LYUCcharset*, p_in,
int, cs_out,
CONST LYUCcharset*, p_out
)
{
pT->transp = (0==strcmp(p_in->MIMEname,"x-transparent") ||
0==strcmp(p_out->MIMEname,"x-transparent"));
if (pT->transp) {
pT->do_cjk = FALSE;
pT->decode_utf8 = FALSE;
pT->output_utf8 = FALSE; /* we may, but won't know about it */
pT->do_8bitraw = TRUE;
pT->use_raw_char_in = TRUE;
pT->strip_raw_char_in = FALSE;
pT->pass_160_173_raw = TRUE;
} else {
BOOL intm_ucs = FALSE;
BOOL use_ucs = FALSE;
pT->do_cjk = ((p_in->enc == UCT_ENC_CJK) && (HTCJK != NOCJK));
pT->decode_utf8 = (p_in->enc == UCT_ENC_UTF8);
pT->output_utf8 = (p_out->enc == UCT_ENC_UTF8);
if (pT->do_cjk) {
intm_ucs = FALSE;
pT->trans_to_uni = FALSE;
use_ucs = FALSE;
pT->do_8bitraw = FALSE;
pT->pass_160_173_raw = TRUE;
pT->use_raw_char_in = FALSE; /* not used for CJK */
pT->trans_from_uni = FALSE; /* not used for CJK */
} else {
intm_ucs = (
cs_in == 0 || pT->decode_utf8 ||
(p_in->codepoints & (UCT_CP_SUBSETOF_LAT1|UCT_CP_SUBSETOF_UCS2))
);
pT->trans_to_uni = (!intm_ucs &&
UCCanUniTranslateFrom(cs_in));
pT->strip_raw_char_in =
((!intm_ucs ||
(p_out->enc==UCT_ENC_7BIT) ||
(p_out->repertoire & UCT_REP_SUBSETOF_LAT1)) &&
cs_in != cs_out &&
0==strcmp(p_in->MIMEname,"koi8-r"));
use_ucs = (intm_ucs || pT->trans_to_uni);
pT->do_8bitraw = (!use_ucs);
pT->pass_160_173_raw = (!use_ucs &&
!(p_in->like8859 & UCT_R_8859SPECL)
);
pT->use_raw_char_in = (!pT->output_utf8 && cs_in == cs_out);
pT->trans_from_uni = (use_ucs && !pT->do_8bitraw &&
!pT->use_raw_char_in &&
UCCanTranslateUniTo(cs_out));
}
}
}
PUBLIC void UCTransParams_clear ARGS1(
UCTransParams *, pT)
{
pT->transp = FALSE;
pT->do_cjk = FALSE;
pT->decode_utf8 = FALSE;
pT->output_utf8 = FALSE;
pT->do_8bitraw = FALSE;
pT->use_raw_char_in = FALSE;
pT->strip_raw_char_in = FALSE;
pT->pass_160_173_raw = FALSE;
pT->trans_to_uni = FALSE;
pT->trans_from_uni = FALSE;
}
/* Given an output target HTStream* (can also be a HTStructured* via typecast),
** the target stream's put_character method, and a unicode character,
** CPutUtf8_charstring() will either output the UTF8 encoding of the unicode
** and return YES, or do nothing and return NO (if conversion would be
** unnecessary or the unicode character is considered invalid).
**
** [Could be used more generally, but is currently only used for &#nnnnn
** stuff - generation of UTF8 from 8-bit encoded charsets not yet done
** by SGML.c etc.]
*/
#define PUTC(ch) ((*myPutc)(target, (char)(ch)))
#define PUTC2(ch) ((*myPutc)(target,(char)(0x80|(0x3f &(ch)))))
PUBLIC BOOL UCPutUtf8_charstring ARGS3(
HTStream *, target,
putc_func_t *, myPutc,
long, code)
{
if (code < 128)
return NO; /* indicate to caller we didn't handle it */
else if (code < 0x800L) {
PUTC(0xc0 | (code>>6));
PUTC2(code);
} else if (code < 0x10000L) {
PUTC(0xe0 | (code>>12));
PUTC2(code>>6);
PUTC2(code);
} else if (code < 0x200000L) {
PUTC(0xf0 | (code>>18));
PUTC2(code>>12);
PUTC2(code>>6);
PUTC2(code);
} else if (code < 0x4000000L) {
PUTC(0xf8 | (code>>24));
PUTC2(code>>18);
PUTC2(code>>12);
PUTC2(code>>6);
PUTC2(code);
} else if (code<=0x7fffffffL) {
PUTC(0xfc | (code>>30));
PUTC2(code>>24);
PUTC2(code>>18);
PUTC2(code>>12);
PUTC2(code>>6);
PUTC2(code);
} else
return NO;
return YES;
}
#endif /* EXP_CHARTRANS */
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