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-rw-r--r--src/backend/utils/mb/wchar.c45
1 files changed, 23 insertions, 22 deletions
diff --git a/src/backend/utils/mb/wchar.c b/src/backend/utils/mb/wchar.c
index 17f74ed6adf..293cab42c37 100644
--- a/src/backend/utils/mb/wchar.c
+++ b/src/backend/utils/mb/wchar.c
@@ -1,7 +1,7 @@
/*
* conversion functions between pg_wchar and multibyte streams.
* Tatsuo Ishii
- * $PostgreSQL: pgsql/src/backend/utils/mb/wchar.c,v 1.47 2005/10/29 00:31:52 petere Exp $
+ * $PostgreSQL: pgsql/src/backend/utils/mb/wchar.c,v 1.47.2.1 2005/12/24 09:42:30 ishii Exp $
*
* WIN1250 client encoding updated by Pavel Behal
*
@@ -58,7 +58,6 @@ pg_ascii_dsplen(const unsigned char *s)
/*
* EUC
*/
-
static int pg_euc2wchar_with_len
(const unsigned char *from, pg_wchar *to, int len)
{
@@ -66,26 +65,26 @@ static int pg_euc2wchar_with_len
while (len > 0 && *from)
{
- if (*from == SS2 && len >= 2)
+ if (*from == SS2 && len >= 2) /* JIS X 0201 (so called "1 byte KANA") */
{
from++;
- *to = 0xff & *from++;
+ *to = (SS2 << 8) | *from++;
len -= 2;
}
- else if (*from == SS3 && len >= 3)
+ else if (*from == SS3 && len >= 3) /* JIS X 0212 KANJI */
{
from++;
- *to = *from++ << 8;
- *to |= 0x3f & *from++;
+ *to = (SS3 << 16) | (*from++ << 8);
+ *to |= *from++;
len -= 3;
}
- else if ((*from & 0x80) && len >= 2)
+ else if ((*from & 0x80) && len >= 2) /* JIS X 0208 KANJI */
{
*to = *from++ << 8;
*to |= *from++;
len -= 2;
}
- else
+ else /* must be ASCII */
{
*to = *from++;
len--;
@@ -183,6 +182,7 @@ pg_euckr_dsplen(const unsigned char *s)
/*
* EUC_CN
+ *
*/
static int pg_euccn2wchar_with_len
(const unsigned char *from, pg_wchar *to, int len)
@@ -191,21 +191,21 @@ static int pg_euccn2wchar_with_len
while (len > 0 && *from)
{
- if (*from == SS2 && len >= 3)
+ if (*from == SS2 && len >= 3) /* code set 2 (unused?) */
{
from++;
- *to = 0x3f00 & (*from++ << 8);
- *to = *from++;
+ *to = (SS2 << 16) | (*from++ << 8);
+ *to |= *from++;
len -= 3;
}
- else if (*from == SS3 && len >= 3)
+ else if (*from == SS3 && len >= 3) /* code set 3 (unsed ?) */
{
from++;
- *to = *from++ << 8;
- *to |= 0x3f & *from++;
+ *to = (SS3 << 16) | (*from++ << 8);
+ *to |= *from++;
len -= 3;
}
- else if ((*from & 0x80) && len >= 2)
+ else if ((*from & 0x80) && len >= 2) /* code set 1 */
{
*to = *from++ << 8;
*to |= *from++;
@@ -249,6 +249,7 @@ pg_euccn_dsplen(const unsigned char *s)
/*
* EUC_TW
+ *
*/
static int pg_euctw2wchar_with_len
(const unsigned char *from, pg_wchar *to, int len)
@@ -257,22 +258,22 @@ static int pg_euctw2wchar_with_len
while (len > 0 && *from)
{
- if (*from == SS2 && len >= 4)
+ if (*from == SS2 && len >= 4) /* code set 2 */
{
from++;
- *to = *from++ << 16;
+ *to = (SS2 << 24) | (*from++ << 16) ;
*to |= *from++ << 8;
*to |= *from++;
len -= 4;
}
- else if (*from == SS3 && len >= 3)
+ else if (*from == SS3 && len >= 3) /* code set 3 (unused?) */
{
from++;
- *to = *from++ << 8;
- *to |= 0x3f & *from++;
+ *to = (SS3 << 16) | (*from++ << 8);
+ *to |= *from++;
len -= 3;
}
- else if ((*from & 0x80) && len >= 2)
+ else if ((*from & 0x80) && len >= 2) /* code set 2 */
{
*to = *from++ << 8;
*to |= *from++;