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https://git.postgresql.org/git/postgresql.git
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a8bd7e1c6e
> > > > It was made to cope with encoding such as an Asian bloc in 7.2Beta2. > > > > > > > > Added ServerEncoding > > > > Korean (JOHAB), Thai (WIN874), > > > > Vietnamese (TCVN), Arabic (WIN1256) > > > > > > > > Added ClientEncoding > > > > Simplified Chinese (GBK), Korean (UHC) > > > > > > > > > > > > > http://www.sankyo-unyu.co.jp/Pool/postgresql-7.2b2.newencoding.diff.tar.gz > > > > (608K) > > > > > > Looks good. I need some people to review this for me. > > > > For me they look good too. The only missing part is a > > documentation. I will ask him to write it up. If he couldn't, I will > > do it for him. > > > The diff is 3mb > > > but appears to address only additions to multibyte. I have attached a > > > list of files it modifies. Also, look at the sizes of the mb/ > > > directory. It is getting large: > > > > > > 4 ./CVS > > > 6 ./Unicode/CVS > > > 3433 ./Unicode > > > 6197 . > > > > Yes. We definitely need the on-the-fly encoding addition capability: > > i.e. CREATE CHRACTER SET in the future... > > -- > > Tatsuo Ishii > > > > Address chainge. http://www.sankyo-unyu.co.jp/Pool/postgresql-7.2.newencoding.diff.gz Add PsqlODBC and document ...etc patch. Eiji Tokuya
666 lines
12 KiB
C
666 lines
12 KiB
C
/*
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* conversion functions between pg_wchar and multi-byte streams.
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* Tatsuo Ishii
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* $Id: wchar.c,v 1.27 2002/03/05 05:52:44 momjian Exp $
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*
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* WIN1250 client encoding updated by Pavel Behal
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*
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*/
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/* can be used in either frontend or backend */
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#ifdef FRONTEND
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#include "postgres_fe.h"
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#define Assert(condition)
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#else
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#include "postgres.h"
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#endif
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#include "mb/pg_wchar.h"
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/*
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* conversion to pg_wchar is done by "table driven."
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* to add an encoding support, define mb2wchar_with_len(), mblen()
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* for the particular encoding. Note that if the encoding is only
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* supported in the client, you don't need to define
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* mb2wchar_with_len() function (SJIS is the case).
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*/
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/*
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* SQL/ASCII
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*/
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static int pg_ascii2wchar_with_len
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(const unsigned char *from, pg_wchar *to, int len)
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{
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int cnt = 0;
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while (len > 0 && *from)
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{
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*to++ = *from++;
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len--;
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cnt++;
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}
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*to = 0;
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return (cnt);
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}
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static int
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pg_ascii_mblen(const unsigned char *s)
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{
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return (1);
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}
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/*
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* EUC
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*/
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static int pg_euc2wchar_with_len
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(const unsigned char *from, pg_wchar *to, int len)
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{
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int cnt = 0;
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while (len > 0 && *from)
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{
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if (*from == SS2 && len >= 2)
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{
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from++;
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*to = 0xff & *from++;
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len -= 2;
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}
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else if (*from == SS3 && len >= 3)
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{
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from++;
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*to = *from++ << 8;
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*to |= 0x3f & *from++;
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len -= 3;
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}
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else if ((*from & 0x80) && len >= 2)
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{
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*to = *from++ << 8;
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*to |= *from++;
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len -= 2;
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}
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else
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{
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*to = *from++;
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len--;
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}
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to++;
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cnt++;
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}
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*to = 0;
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return (cnt);
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}
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static int
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pg_euc_mblen(const unsigned char *s)
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{
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int len;
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if (*s == SS2)
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len = 2;
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else if (*s == SS3)
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len = 3;
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else if (*s & 0x80)
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len = 2;
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else
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len = 1;
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return (len);
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}
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/*
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* EUC_JP
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*/
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static int pg_eucjp2wchar_with_len
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(const unsigned char *from, pg_wchar *to, int len)
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{
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return (pg_euc2wchar_with_len(from, to, len));
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}
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static int
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pg_eucjp_mblen(const unsigned char *s)
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{
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return (pg_euc_mblen(s));
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}
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/*
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* EUC_KR
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*/
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static int pg_euckr2wchar_with_len
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(const unsigned char *from, pg_wchar *to, int len)
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{
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return (pg_euc2wchar_with_len(from, to, len));
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}
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static int
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pg_euckr_mblen(const unsigned char *s)
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{
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return (pg_euc_mblen(s));
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}
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/*
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* EUC_CN
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*/
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static int pg_euccn2wchar_with_len
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(const unsigned char *from, pg_wchar *to, int len)
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{
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int cnt = 0;
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while (len > 0 && *from)
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{
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if (*from == SS2 && len >= 3)
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{
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from++;
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*to = 0x3f00 & (*from++ << 8);
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*to = *from++;
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len -= 3;
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}
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else if (*from == SS3 && len >= 3)
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{
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from++;
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*to = *from++ << 8;
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*to |= 0x3f & *from++;
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len -= 3;
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}
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else if ((*from & 0x80) && len >= 2)
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{
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*to = *from++ << 8;
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*to |= *from++;
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len -= 2;
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}
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else
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{
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*to = *from++;
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len--;
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}
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to++;
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cnt++;
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}
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*to = 0;
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return (cnt);
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}
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static int
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pg_euccn_mblen(const unsigned char *s)
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{
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int len;
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if (*s & 0x80)
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len = 2;
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else
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len = 1;
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return (len);
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}
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/*
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* EUC_TW
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*/
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static int pg_euctw2wchar_with_len
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(const unsigned char *from, pg_wchar *to, int len)
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{
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int cnt = 0;
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while (len > 0 && *from)
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{
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if (*from == SS2 && len >= 4)
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{
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from++;
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*to = *from++ << 16;
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*to |= *from++ << 8;
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*to |= *from++;
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len -= 4;
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}
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else if (*from == SS3 && len >= 3)
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{
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from++;
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*to = *from++ << 8;
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*to |= 0x3f & *from++;
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len -= 3;
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}
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else if ((*from & 0x80) && len >= 2)
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{
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*to = *from++ << 8;
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*to |= *from++;
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len -= 2;
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}
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else
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{
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*to = *from++;
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len--;
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}
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to++;
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cnt++;
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}
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*to = 0;
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return (cnt);
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}
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static int
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pg_euctw_mblen(const unsigned char *s)
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{
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int len;
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if (*s == SS2)
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len = 4;
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else if (*s == SS3)
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len = 3;
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else if (*s & 0x80)
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len = 2;
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else
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len = 1;
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return (len);
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}
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/*
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* JOHAB
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*/
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static int
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pg_johab2wchar_with_len(const unsigned char *from, pg_wchar *to, int len)
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{
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return (pg_euc2wchar_with_len(from, to, len));
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}
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static int
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pg_johab_mblen(const unsigned char *s)
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{
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return (pg_euc_mblen(s));
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}
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/*
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* convert UTF-8 string to pg_wchar (UCS-2)
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* caller should allocate enough space for "to"
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* len: length of from.
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* "from" not necessarily null terminated.
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*/
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static int
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pg_utf2wchar_with_len(const unsigned char *from, pg_wchar *to, int len)
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{
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unsigned char c1,
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c2,
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c3;
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int cnt = 0;
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while (len > 0 && *from)
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{
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if ((*from & 0x80) == 0)
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{
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*to = *from++;
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len--;
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}
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else if ((*from & 0xe0) == 0xc0 && len >= 2)
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{
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c1 = *from++ & 0x1f;
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c2 = *from++ & 0x3f;
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*to = c1 << 6;
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*to |= c2;
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len -= 2;
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}
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else if ((*from & 0xe0) == 0xe0 && len >= 3)
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{
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c1 = *from++ & 0x0f;
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c2 = *from++ & 0x3f;
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c3 = *from++ & 0x3f;
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*to = c1 << 12;
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*to |= c2 << 6;
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*to |= c3;
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len -= 3;
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}
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else
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{
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*to = *from++;
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len--;
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}
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to++;
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cnt++;
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}
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*to = 0;
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return (cnt);
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}
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/*
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* returns the byte length of a UTF-8 word pointed to by s
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*/
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int
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pg_utf_mblen(const unsigned char *s)
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{
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int len = 1;
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if ((*s & 0x80) == 0)
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len = 1;
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else if ((*s & 0xe0) == 0xc0)
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len = 2;
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else if ((*s & 0xe0) == 0xe0)
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len = 3;
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return (len);
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}
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/*
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* convert mule internal code to pg_wchar
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* caller should allocate enough space for "to"
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* len: length of from.
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* "from" not necessarily null terminated.
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*/
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static int
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pg_mule2wchar_with_len(const unsigned char *from, pg_wchar *to, int len)
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{
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int cnt = 0;
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while (len > 0 && *from)
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{
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if (IS_LC1(*from) && len >= 2)
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{
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*to = *from++ << 16;
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*to |= *from++;
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len -= 2;
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}
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else if (IS_LCPRV1(*from) && len >= 3)
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{
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from++;
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*to = *from++ << 16;
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*to |= *from++;
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len -= 3;
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}
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else if (IS_LC2(*from) && len >= 3)
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{
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*to = *from++ << 16;
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*to |= *from++ << 8;
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*to |= *from++;
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len -= 3;
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}
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else if (IS_LCPRV2(*from) && len >= 4)
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{
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from++;
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*to = *from++ << 16;
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*to |= *from++ << 8;
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*to |= *from++;
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len -= 4;
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}
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else
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{ /* assume ASCII */
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*to = (unsigned char) *from++;
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len--;
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}
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to++;
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cnt++;
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}
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*to = 0;
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return (cnt);
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}
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int
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pg_mule_mblen(const unsigned char *s)
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{
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int len;
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if (IS_LC1(*s))
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len = 2;
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else if (IS_LCPRV1(*s))
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len = 3;
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else if (IS_LC2(*s))
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len = 3;
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else if (IS_LCPRV2(*s))
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len = 4;
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else
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{ /* assume ASCII */
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len = 1;
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}
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return (len);
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}
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/*
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* ISO8859-1
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*/
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static int
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pg_latin12wchar_with_len(const unsigned char *from, pg_wchar *to, int len)
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{
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int cnt = 0;
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while (len > 0 && *from)
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{
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*to++ = *from++;
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len--;
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cnt++;
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}
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*to = 0;
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return (cnt);
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}
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static int
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pg_latin1_mblen(const unsigned char *s)
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{
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return (1);
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}
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/*
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* SJIS
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*/
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static int
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pg_sjis_mblen(const unsigned char *s)
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{
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int len;
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if (*s >= 0xa1 && *s <= 0xdf)
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{ /* 1 byte kana? */
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len = 1;
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}
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else if (*s > 0x7f)
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{ /* kanji? */
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len = 2;
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}
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else
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{ /* should be ASCII */
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len = 1;
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}
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return (len);
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}
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/*
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* Big5
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*/
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static int
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pg_big5_mblen(const unsigned char *s)
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{
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int len;
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if (*s > 0x7f)
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{ /* kanji? */
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len = 2;
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}
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else
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{ /* should be ASCII */
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len = 1;
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}
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return (len);
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}
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/*
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* GBK
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*/
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static int
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pg_gbk_mblen(const unsigned char *s)
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{
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int len;
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if (*s > 0x7f)
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{ /* kanji? */
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len = 2;
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}
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else
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{ /* should be ASCII */
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len = 1;
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}
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return (len);
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}
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/*
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* UHC
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*/
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static int
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pg_uhc_mblen(const unsigned char *s)
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{
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int len;
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if (*s > 0x7f)
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{ /* 2byte? */
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len = 2;
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}
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else
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{ /* should be ASCII */
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len = 1;
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}
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return (len);
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}
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pg_wchar_tbl pg_wchar_table[] = {
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{pg_ascii2wchar_with_len, pg_ascii_mblen, 1}, /* 0; PG_SQL_ASCII */
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{pg_eucjp2wchar_with_len, pg_eucjp_mblen, 3}, /* 1; PG_EUC_JP */
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{pg_euccn2wchar_with_len, pg_euccn_mblen, 3}, /* 2; PG_EUC_CN */
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{pg_euckr2wchar_with_len, pg_euckr_mblen, 3}, /* 3; PG_EUC_KR */
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{pg_euctw2wchar_with_len, pg_euctw_mblen, 3}, /* 4; PG_EUC_TW */
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{pg_johab2wchar_with_len, pg_johab_mblen, 3}, /* 5; PG_JOHAB */
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{pg_utf2wchar_with_len, pg_utf_mblen, 3}, /* 6; PG_UNICODE */
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{pg_mule2wchar_with_len, pg_mule_mblen, 3}, /* 7; PG_MULE_INTERNAL */
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{pg_latin12wchar_with_len, pg_latin1_mblen, 1}, /* 8; PG_LATIN1 */
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{pg_latin12wchar_with_len, pg_latin1_mblen, 1}, /* 9; PG_LATIN2 */
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{pg_latin12wchar_with_len, pg_latin1_mblen, 1}, /* 10; PG_LATIN3 */
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{pg_latin12wchar_with_len, pg_latin1_mblen, 1}, /* 11; PG_LATIN4 */
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{pg_latin12wchar_with_len, pg_latin1_mblen, 1}, /* 12; PG_LATIN5 */
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{pg_latin12wchar_with_len, pg_latin1_mblen, 1}, /* 13; PG_LATIN6 */
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{pg_latin12wchar_with_len, pg_latin1_mblen, 1}, /* 14; PG_LATIN7 */
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{pg_latin12wchar_with_len, pg_latin1_mblen, 1}, /* 15; PG_LATIN8 */
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{pg_latin12wchar_with_len, pg_latin1_mblen, 1}, /* 16; PG_LATIN9 */
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{pg_latin12wchar_with_len, pg_latin1_mblen, 1}, /* 17; PG_LATIN10 */
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{pg_latin12wchar_with_len, pg_latin1_mblen, 1}, /* 18; PG_WIN1256 */
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{pg_latin12wchar_with_len, pg_latin1_mblen, 1}, /* 19; PG_TCVN */
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{pg_latin12wchar_with_len, pg_latin1_mblen, 1}, /* 20; PG_WIN874 */
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{pg_latin12wchar_with_len, pg_latin1_mblen, 1}, /* 21; PG_KOI8 */
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{pg_latin12wchar_with_len, pg_latin1_mblen, 1}, /* 22; PG_WIN1251 */
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{pg_latin12wchar_with_len, pg_latin1_mblen, 1}, /* 23; PG_ALT */
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{pg_latin12wchar_with_len, pg_latin1_mblen, 1}, /* 24; ISO-8859-5 */
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{pg_latin12wchar_with_len, pg_latin1_mblen, 1}, /* 25; ISO-8859-6 */
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{pg_latin12wchar_with_len, pg_latin1_mblen, 1}, /* 26; ISO-8859-7 */
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{pg_latin12wchar_with_len, pg_latin1_mblen, 1}, /* 27; ISO-8859-8 */
|
|
{0, pg_sjis_mblen, 2}, /* 28; PG_SJIS */
|
|
{0, pg_big5_mblen, 2}, /* 29; PG_BIG5 */
|
|
{0, pg_gbk_mblen, 2}, /* 30; PG_GBK */
|
|
{0, pg_uhc_mblen, 2}, /* 31; PG_UHC */
|
|
{pg_latin12wchar_with_len, pg_latin1_mblen, 1}, /* 32; PG_WIN1250 */
|
|
};
|
|
|
|
/* returns the byte length of a word for mule internal code */
|
|
int
|
|
pg_mic_mblen(const unsigned char *mbstr)
|
|
{
|
|
return (pg_mule_mblen(mbstr));
|
|
}
|
|
|
|
/*
|
|
* Returns the byte length of a multi-byte word.
|
|
*/
|
|
int
|
|
pg_encoding_mblen(int encoding, const unsigned char *mbstr)
|
|
{
|
|
Assert(PG_VALID_ENCODING(encoding));
|
|
|
|
return ((encoding >= 0 &&
|
|
encoding < sizeof(pg_wchar_table) / sizeof(pg_wchar_tbl)) ?
|
|
((*pg_wchar_table[encoding].mblen) (mbstr)) :
|
|
((*pg_wchar_table[PG_SQL_ASCII].mblen) (mbstr)));
|
|
}
|
|
|
|
/*
|
|
* fetch maximum length of a char encoding
|
|
*/
|
|
int
|
|
pg_encoding_max_length(int encoding)
|
|
{
|
|
Assert(PG_VALID_ENCODING(encoding));
|
|
|
|
return pg_wchar_table[encoding].maxmblen;
|
|
}
|
|
|
|
#ifndef FRONTEND
|
|
/*
|
|
* Verify mbstr to make sure that it has a valid character sequence.
|
|
* mbstr is not necessarily NULL terminated. length of mbstr is
|
|
* specified by len. If an error was found, returns an error message.
|
|
* Note that the message is kept in a static buffer, the next invocation
|
|
* might break the message.
|
|
* If no error was found, this function returns NULL.
|
|
*/
|
|
char *
|
|
pg_verifymbstr(const unsigned char *mbstr, int len)
|
|
{
|
|
int l;
|
|
int i,
|
|
j;
|
|
static char buf[256];
|
|
int slen = 0;
|
|
|
|
/* we do not check single byte encodings */
|
|
if (pg_database_encoding_max_length() <= 1)
|
|
return NULL;
|
|
|
|
while (len > 0 && *mbstr)
|
|
{
|
|
/* special UTF-8 check */
|
|
if (GetDatabaseEncoding() == PG_UTF8 &&
|
|
(*mbstr & 0xf8) == 0xf0)
|
|
{
|
|
snprintf(buf, sizeof(buf), "Unicode >= 0x10000 is not supoorted");
|
|
return (buf);
|
|
}
|
|
|
|
l = pg_mblen(mbstr);
|
|
|
|
/* multi-byte letter? */
|
|
if (l > 1)
|
|
{
|
|
for (i = 1; i < l; i++)
|
|
{
|
|
if (i > len || *(mbstr + i) == '\0' ||
|
|
|
|
/*
|
|
* we assume that every muti-byte letter consists of bytes
|
|
* being the 8th bit set
|
|
*/
|
|
((*(mbstr + i) & 0x80) == 0))
|
|
{
|
|
int remains = sizeof(buf);
|
|
char *p = buf;
|
|
|
|
slen = snprintf(p, remains, "Invalid %s character sequence found (0x",
|
|
GetDatabaseEncodingName());
|
|
p += slen;
|
|
remains -= slen;
|
|
|
|
i = ((*(mbstr + i) & 0x80) == 0) ? l : i;
|
|
|
|
for (j = 0; j < i; j++)
|
|
{
|
|
slen = snprintf(p, remains, "%02x",
|
|
*(mbstr + j));
|
|
p += slen;
|
|
remains -= slen;
|
|
}
|
|
snprintf(p, remains, ")");
|
|
return (buf);
|
|
}
|
|
}
|
|
}
|
|
len -= l;
|
|
mbstr += l;
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
/*
|
|
* fetch maximum length of a char encoding for the current database
|
|
*/
|
|
int
|
|
pg_database_encoding_max_length(void)
|
|
{
|
|
return pg_wchar_table[GetDatabaseEncoding()].maxmblen;
|
|
}
|
|
|
|
#endif
|