c0b01461db
if MULTIBYTE is not enabled. So be sure to run initdb. o these patches are made against the latest source tree (after Bruce's massive patch, I think) BTW, I noticed that after running regression, the oid field of pg_type seems disappeared. regression=> select oid from pg_type; ERROR: attribute 'oid' not found this happens after the constraints test. This occures with/without my patches. strange... o pg_database_mb.h, pg_class_mb.h, pg_attribute_mb.h are no longer used, and shoud be removed. o GetDatabaseInfo() in utils/misc/database.c removed (actually in #ifdef 0). seems nobody uses. t-ishii@sra.co.jp
359 lines
6.6 KiB
C
359 lines
6.6 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 1.2 1998/08/24 01:14:01 momjian Exp $
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*/
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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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static void 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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while (*from && len > 0) {
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if (*from == SS2) {
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from++;
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len--;
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*to = 0xff & *from++;
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len--;
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} else if (*from == SS3) {
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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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} else if (*from & 0x80) {
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*to = *from++ << 8;
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*to |= *from++;
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len -= 2;
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} else {
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*to = *from++;
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len--;
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}
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to++;
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}
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*to = 0;
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}
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static int 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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}
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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 void 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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pg_euc2wchar_with_len(from,to,len);
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}
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static int 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 void 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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pg_euc2wchar_with_len(from,to,len);
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}
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static int 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 void 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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while (*from && len > 0) {
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if (*from == SS2) {
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from++;
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len--;
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*to = 0x3f00 & (*from++ << 8);
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*to = *from++;
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len -= 2;
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} else if (*from == SS3) {
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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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} else if (*from & 0x80) {
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*to = *from++ << 8;
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*to |= *from++;
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len -= 2;
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} else {
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*to = *from++;
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len--;
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}
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to++;
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}
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*to = 0;
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}
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static int pg_euccn_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 = 3;
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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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}
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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 void 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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while (*from && len > 0) {
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if (*from == SS2) {
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from++;
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len--;
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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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} else if (*from == SS3) {
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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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} else if (*from & 0x80) {
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*to = *from++ << 8;
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*to |= *from++;
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len -= 2;
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} else {
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*to = *from++;
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len--;
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}
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to++;
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}
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*to = 0;
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}
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static int 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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}
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return(len);
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}
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/*
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* convert UTF-8 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 void pg_utf2wchar_with_len(const unsigned char *from, pg_wchar *to, int len)
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{
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unsigned char c1,c2,c3;
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while (*from && len > 0) {
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if ((*from & 0x80) == 0) {
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*to = *from++;
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len--;
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} else if ((*from & 0xe0) == 0xc0) {
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c1 = *from++ & 0x1f;
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c2 = *from++ & 0x3f;
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len -= 2;
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*to = c1 << 6;
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*to |= c2;
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} else if ((*from & 0xe0) == 0xe0) {
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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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len -= 3;
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*to = c1 << 12;
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*to |= c2 << 6;
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*to |= c3;
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}
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to++;
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}
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*to = 0;
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}
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static int 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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}
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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 void pg_mule2wchar_with_len(const unsigned char *from, pg_wchar *to, int len)
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{
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while (*from && len > 0) {
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if (IS_LC1(*from)) {
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*to = *from++ << 16;
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*to |= *from++;
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len -= 2;
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} else if (IS_LCPRV1(*from)) {
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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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} else if (IS_LC2(*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 -= 3;
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} else if (IS_LCPRV2(*from)) {
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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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} else { /* 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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}
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*to = 0;
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}
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int 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 { /* 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 void pg_latin12wchar_with_len(const unsigned char *from, pg_wchar *to, int len)
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{
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while (*from && len-- > 0) {
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*to++ = *from++;
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}
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*to = 0;
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}
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static int 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 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) { /* 1 byte kana? */
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len = 1;
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} else if (*s > 0x7f) { /* kanji? */
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len = 2;
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} else { /* 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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{0, 0},
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{pg_eucjp2wchar_with_len, pg_eucjp_mblen},
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{pg_euccn2wchar_with_len, pg_euccn_mblen},
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{pg_euckr2wchar_with_len, pg_euckr_mblen},
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{pg_euctw2wchar_with_len, pg_euctw_mblen},
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{pg_utf2wchar_with_len, pg_utf_mblen},
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{pg_mule2wchar_with_len, pg_mule_mblen},
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{pg_latin12wchar_with_len, pg_latin1_mblen},
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{pg_latin12wchar_with_len, pg_latin1_mblen},
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{pg_latin12wchar_with_len, pg_latin1_mblen},
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{pg_latin12wchar_with_len, pg_latin1_mblen},
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{pg_latin12wchar_with_len, pg_latin1_mblen},
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{0, 0},
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{0, 0},
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{0, 0},
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{0, 0},
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{0, 0},
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{0, 0},
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{0, 0},
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{0, 0},
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{0, 0},
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{0, 0},
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{0, 0},
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{0, 0},
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{0, 0},
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{0, 0},
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{0, 0},
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{0, 0},
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{0, 0},
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{0, 0},
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{0, 0},
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{0, 0},
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{0, pg_sjis_mblen}
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};
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/* returns the byte length of a word for mule internal code */
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int pg_mic_mblen(const unsigned char *mbstr)
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{
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return(pg_mule_mblen(mbstr));
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}
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