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Included patches make some enhancements to the multi-byte support.

Browse Source 
o allow to use Big5 (a Chinese encoding used in Taiwan) as a client
  encoding. In this case the server side encoding should be EUC_TW

o add EUC_TW and Big5 test cases to the regression and the mb test
  (contributed by Jonah Kuo)

o fix mistake in include/mb/pg_wchar.h. An encoding id for EUC_TW was
  not correct (was 3 and now is 4)

o update documents (doc/README.mb and README.mb.jp)

o update psql helpfile (bin/psql/psqlHelp.h)

--
Tatsuo Ishii
t-ishii@sra.co.jp
This commit is contained in:
Bruce Momjian
1999-02-02 18:51:40 +00:00
parent 8358a8f6a0
commit a7ad43cd18
13 changed files with 605 additions and 19 deletions
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91
src/backend/utils/mb/conv.c
View File

@@ -2,7 +2,7 @@
* conversion between client encoding and server internal encoding
* (currently mule internal code (mic) is used)
* Tatsuo Ishii
* $Id: conv.c,v 1.4 1998/12/14 04:59:58 momjian Exp $
* $Id: conv.c,v 1.5 1999/02/02 18:51:23 momjian Exp $
*/
#include <stdio.h>
#include <string.h>
@@ -369,6 +369,94 @@ mic2euc_tw(unsigned char *mic, unsigned char *p, int len)
*p = '\0';
}
/*
* Big5 ---> MIC
*/
static void
big52mic(unsigned char *big5, unsigned char *p, int len)
{
unsigned short c1;
unsigned short big5buf, cnsBuf;
unsigned char lc;
char bogusBuf[2];
int i;
while (len > 0 && (c1 = *big5++))
{
if (c1 <= 0x007fU) { /* ASCII */
len--;
*p++ = c1;
} else {
len -= 2;
big5buf = c1 << 8;
c1 = *big5++;
big5buf |= c1;
cnsBuf = BIG5toCNS(big5buf, &lc);
if (lc != 0) {
if (lc == LC_CNS11643_3 || lc == LC_CNS11643_4) {
*p++ = 0x9d; /* LCPRV2 */
}
*p++ = lc; /* Plane No. */
*p++ = (cnsBuf >> 8) & 0x00ff;
*p++ = cnsBuf & 0x00ff;
} else { /* cannot convert */
big5 -= 2;
*p++ = '(';
for (i=0;i<2;i++) {
sprintf(bogusBuf,"%02x",*big5++);
*p++ = bogusBuf[0];
*p++ = bogusBuf[1];
}
*p++ = ')';
}
}
}
*p = '\0';
}
/*
* MIC ---> Big5
*/
static void
mic2big5(unsigned char *mic, unsigned char *p, int len)
{
int l;
unsigned short c1;
unsigned short big5buf, cnsBuf;
while (len > 0 && (c1 = *mic))
{
l = pg_mic_mblen(mic++);
len -= l;
/* 0x9d means LCPRV2 */
if (c1 == LC_CNS11643_1 || c1 == LC_CNS11643_2 || c1 == 0x9d)
{
if (c1 == 0x9d) {
c1 = *mic++; /* get plane no. */
}
cnsBuf = (*mic++)<<8;
cnsBuf |= (*mic++) & 0x00ff;
big5buf = CNStoBIG5(cnsBuf, c1);
if (big5buf == 0) { /* cannot convert to Big5! */
mic -= l;
printBogusChar(&mic, &p);
} else {
*p++ = (big5buf >> 8) & 0x00ff;
*p++ = big5buf & 0x00ff;
}
}
else if (c1 <= 0x7f) /* ASCII */
{
*p++ = c1;
} else { /* cannot convert to Big5! */
mic--;
printBogusChar(&mic, &p);
}
}
*p = '\0';
}
/*
* LATINn ---> MIC
*/
@@ -514,5 +602,6 @@ pg_encoding_conv_tbl pg_conv_tbl[] = {
{LATIN4, "LATIN4", 0, latin42mic, mic2latin4}, /* ISO 8859 Latin 4 */
{LATIN5, "LATIN5", 0, latin52mic, mic2latin5}, /* ISO 8859 Latin 5 */
{SJIS, "SJIS", 1, sjis2mic, mic2sjis}, /* SJIS */
{BIG5, "BIG5", 1, big52mic, mic2big5}, /* Big5 */
{-1, "", 0, 0, 0} /* end mark */
};