From 72dd6291f216440f6bb61a8733729a37c7e3b2d2 Mon Sep 17 00:00:00 2001
From: Robert Haas <rhaas@postgresql.org>
Date: Wed, 4 Jul 2012 17:10:10 -0400
Subject: [PATCH] Add wchar -> mb conversion routines.
This is infrastructure for Alexander Korotkov's work on indexing regular
expression searches.
Alexander Korotkov, with a bit of further hackery on the MULE conversion
by me
---
src/backend/utils/mb/mbutils.c | 22 +++
src/backend/utils/mb/wchar.c | 247 +++++++++++++++++++++++++++------
src/include/mb/pg_wchar.h | 24 +++-
3 files changed, 248 insertions(+), 45 deletions(-)
diff --git a/src/backend/utils/mb/mbutils.c b/src/backend/utils/mb/mbutils.c
index 848c26f41fb..287ff808fc1 100644
--- a/src/backend/utils/mb/mbutils.c
+++ b/src/backend/utils/mb/mbutils.c
@@ -710,6 +710,28 @@ pg_encoding_mb2wchar_with_len(int encoding,
return (*pg_wchar_table[encoding].mb2wchar_with_len) ((const unsigned char *) from, to, len);
}
+/* convert a wchar string to a multibyte */
+int
+pg_wchar2mb(const pg_wchar *from, char *to)
+{
+ return (*pg_wchar_table[DatabaseEncoding->encoding].wchar2mb_with_len) (from, (unsigned char *)to, pg_wchar_strlen(from));
+}
+
+/* convert a wchar string to a multibyte with a limited length */
+int
+pg_wchar2mb_with_len(const pg_wchar *from, char *to, int len)
+{
+ return (*pg_wchar_table[DatabaseEncoding->encoding].wchar2mb_with_len) (from, (unsigned char *)to, len);
+}
+
+/* same, with any encoding */
+int
+pg_encoding_wchar2mb_with_len(int encoding,
+ const pg_wchar *from, char *to, int len)
+{
+ return (*pg_wchar_table[encoding].wchar2mb_with_len) (from, (unsigned char *)to, len);
+}
+
/* returns the byte length of a multibyte character */
int
pg_mblen(const char *mbstr)
diff --git a/src/backend/utils/mb/wchar.c b/src/backend/utils/mb/wchar.c
index 2e1db5ebf4b..1755be5ebfa 100644
--- a/src/backend/utils/mb/wchar.c
+++ b/src/backend/utils/mb/wchar.c
@@ -339,6 +339,54 @@ pg_euctw_dsplen(const unsigned char *s)
return len;
}
+/*
+ * Convert pg_wchar to EUC_* encoding.
+ * caller must allocate enough space for "to", including a trailing zero!
+ * len: length of from.
+ * "from" not necessarily null terminated.
+ */
+static int
+pg_wchar2euc_with_len(const pg_wchar *from, unsigned char *to, int len)
+{
+ int cnt = 0;
+
+ while (len > 0 && *from)
+ {
+ unsigned char c;
+
+ if ((c = *from >> 24))
+ {
+ *to++ = c;
+ *to++ = (*from >> 16) & 0xff;
+ *to++ = (*from >> 8) & 0xff;
+ *to++ = *from & 0xff;
+ cnt += 4;
+ }
+ else if ((c = *from >> 16))
+ {
+ *to++ = c;
+ *to++ = (*from >> 8) & 0xff;
+ *to++ = *from & 0xff;
+ cnt += 3;
+ }
+ else if ((c = *from >> 8))
+ {
+ *to++ = c;
+ *to++ = *from & 0xff;
+ cnt += 2;
+ }
+ else
+ {
+ *to++ = *from;
+ cnt++;
+ }
+ len--;
+ }
+ *to = 0;
+ return cnt;
+}
+
+
/*
* JOHAB
*/
@@ -453,6 +501,30 @@ unicode_to_utf8(pg_wchar c, unsigned char *utf8string)
return utf8string;
}
+/*
+ * Trivial conversion from pg_wchar to UTF-8.
+ * caller should allocate enough space for "to"
+ * len: length of from.
+ * "from" not necessarily null terminated.
+ */
+static int
+pg_wchar2utf_with_len(const pg_wchar *from, unsigned char *to, int len)
+{
+ int cnt = 0;
+
+ while (len > 0 && *from)
+ {
+ int char_len;
+
+ unicode_to_utf8(*from, to);
+ char_len = pg_utf_mblen(to);
+ len--;
+ cnt += char_len;
+ to += char_len;
+ }
+ *to = 0;
+ return cnt;
+}
/*
* Return the byte length of a UTF8 character pointed to by s
@@ -719,6 +791,75 @@ pg_mule2wchar_with_len(const unsigned char *from, pg_wchar *to, int len)
return cnt;
}
+/*
+ * convert pg_wchar to mule internal code
+ * caller should allocate enough space for "to"
+ * len: length of from.
+ * "from" not necessarily null terminated.
+ */
+static int
+pg_wchar2mule_with_len(const pg_wchar *from, unsigned char *to, int len)
+{
+ int cnt = 0;
+ unsigned char lb;
+
+ while (len > 0 && *from)
+ {
+ lb = (*from >> 16) & 0xff;
+ if (IS_LC1(lb))
+ {
+ *to++ = lb;
+ *to++ = *from & 0xff;
+ cnt += 2;
+ }
+ else if (IS_LC2(lb))
+ {
+ *to++ = lb;
+ *to++ = (*from >> 8) & 0xff;
+ *to++ = *from & 0xff;
+ cnt += 3;
+ }
+ else if (IS_LCPRV1_A_RANGE(lb))
+ {
+ *to++ = LCPRV1_A;
+ *to++ = lb;
+ *to++ = *from & 0xff;
+ cnt += 3;
+ }
+ else if (IS_LCPRV1_B_RANGE(lb))
+ {
+ *to++ = LCPRV1_B;
+ *to++ = lb;
+ *to++ = *from & 0xff;
+ cnt += 3;
+ }
+ else if (IS_LCPRV2_A_RANGE(lb))
+ {
+ *to++ = LCPRV2_A;
+ *to++ = lb;
+ *to++ = (*from >> 8) & 0xff;
+ *to++ = *from & 0xff;
+ cnt += 4;
+ }
+ else if (IS_LCPRV2_B_RANGE(lb))
+ {
+ *to++ = LCPRV2_B;
+ *to++ = lb;
+ *to++ = (*from >> 8) & 0xff;
+ *to++ = *from & 0xff;
+ cnt += 4;
+ }
+ else
+ {
+ *to++ = lb;
+ cnt += 1;
+ }
+ len--;
+ }
+ *to = 0;
+ return cnt;
+}
+
int
pg_mule_mblen(const unsigned char *s)
{
@@ -780,6 +921,28 @@ pg_latin12wchar_with_len(const unsigned char *from, pg_wchar *to, int len)
return cnt;
}
+/*
+ * Trivial conversion from pg_wchar to single byte encoding. Just ignores
+ * high bits.
+ * caller should allocate enough space for "to"
+ * len: length of from.
+ * "from" not necessarily null terminated.
+ */
+static int
+pg_wchar2single_with_len(const pg_wchar *from, unsigned char *to, int len)
+{
+ int cnt = 0;
+
+ while (len > 0 && *from)
+ {
+ *to++ = *from++;
+ len--;
+ cnt++;
+ }
+ *to = 0;
+ return cnt;
+}
+
static int
pg_latin1_mblen(const unsigned char *s)
{
@@ -1556,48 +1719,48 @@ pg_eucjp_increment(unsigned char *charptr, int length)
*-------------------------------------------------------------------
*/
pg_wchar_tbl pg_wchar_table[] = {
- {pg_ascii2wchar_with_len, pg_ascii_mblen, pg_ascii_dsplen, pg_ascii_verifier, 1}, /* PG_SQL_ASCII */
- {pg_eucjp2wchar_with_len, pg_eucjp_mblen, pg_eucjp_dsplen, pg_eucjp_verifier, 3}, /* PG_EUC_JP */
- {pg_euccn2wchar_with_len, pg_euccn_mblen, pg_euccn_dsplen, pg_euccn_verifier, 2}, /* PG_EUC_CN */
- {pg_euckr2wchar_with_len, pg_euckr_mblen, pg_euckr_dsplen, pg_euckr_verifier, 3}, /* PG_EUC_KR */
- {pg_euctw2wchar_with_len, pg_euctw_mblen, pg_euctw_dsplen, pg_euctw_verifier, 4}, /* PG_EUC_TW */
- {pg_eucjp2wchar_with_len, pg_eucjp_mblen, pg_eucjp_dsplen, pg_eucjp_verifier, 3}, /* PG_EUC_JIS_2004 */
- {pg_utf2wchar_with_len, pg_utf_mblen, pg_utf_dsplen, pg_utf8_verifier, 4}, /* PG_UTF8 */
- {pg_mule2wchar_with_len, pg_mule_mblen, pg_mule_dsplen, pg_mule_verifier, 4}, /* PG_MULE_INTERNAL */
- {pg_latin12wchar_with_len, pg_latin1_mblen, pg_latin1_dsplen, pg_latin1_verifier, 1}, /* PG_LATIN1 */
- {pg_latin12wchar_with_len, pg_latin1_mblen, pg_latin1_dsplen, pg_latin1_verifier, 1}, /* PG_LATIN2 */
- {pg_latin12wchar_with_len, pg_latin1_mblen, pg_latin1_dsplen, pg_latin1_verifier, 1}, /* PG_LATIN3 */
- {pg_latin12wchar_with_len, pg_latin1_mblen, pg_latin1_dsplen, pg_latin1_verifier, 1}, /* PG_LATIN4 */
- {pg_latin12wchar_with_len, pg_latin1_mblen, pg_latin1_dsplen, pg_latin1_verifier, 1}, /* PG_LATIN5 */
- {pg_latin12wchar_with_len, pg_latin1_mblen, pg_latin1_dsplen, pg_latin1_verifier, 1}, /* PG_LATIN6 */
- {pg_latin12wchar_with_len, pg_latin1_mblen, pg_latin1_dsplen, pg_latin1_verifier, 1}, /* PG_LATIN7 */
- {pg_latin12wchar_with_len, pg_latin1_mblen, pg_latin1_dsplen, pg_latin1_verifier, 1}, /* PG_LATIN8 */
- {pg_latin12wchar_with_len, pg_latin1_mblen, pg_latin1_dsplen, pg_latin1_verifier, 1}, /* PG_LATIN9 */
- {pg_latin12wchar_with_len, pg_latin1_mblen, pg_latin1_dsplen, pg_latin1_verifier, 1}, /* PG_LATIN10 */
- {pg_latin12wchar_with_len, pg_latin1_mblen, pg_latin1_dsplen, pg_latin1_verifier, 1}, /* PG_WIN1256 */
- {pg_latin12wchar_with_len, pg_latin1_mblen, pg_latin1_dsplen, pg_latin1_verifier, 1}, /* PG_WIN1258 */
- {pg_latin12wchar_with_len, pg_latin1_mblen, pg_latin1_dsplen, pg_latin1_verifier, 1}, /* PG_WIN866 */
- {pg_latin12wchar_with_len, pg_latin1_mblen, pg_latin1_dsplen, pg_latin1_verifier, 1}, /* PG_WIN874 */
- {pg_latin12wchar_with_len, pg_latin1_mblen, pg_latin1_dsplen, pg_latin1_verifier, 1}, /* PG_KOI8R */
- {pg_latin12wchar_with_len, pg_latin1_mblen, pg_latin1_dsplen, pg_latin1_verifier, 1}, /* PG_WIN1251 */
- {pg_latin12wchar_with_len, pg_latin1_mblen, pg_latin1_dsplen, pg_latin1_verifier, 1}, /* PG_WIN1252 */
- {pg_latin12wchar_with_len, pg_latin1_mblen, pg_latin1_dsplen, pg_latin1_verifier, 1}, /* ISO-8859-5 */
- {pg_latin12wchar_with_len, pg_latin1_mblen, pg_latin1_dsplen, pg_latin1_verifier, 1}, /* ISO-8859-6 */
- {pg_latin12wchar_with_len, pg_latin1_mblen, pg_latin1_dsplen, pg_latin1_verifier, 1}, /* ISO-8859-7 */
- {pg_latin12wchar_with_len, pg_latin1_mblen, pg_latin1_dsplen, pg_latin1_verifier, 1}, /* ISO-8859-8 */
- {pg_latin12wchar_with_len, pg_latin1_mblen, pg_latin1_dsplen, pg_latin1_verifier, 1}, /* PG_WIN1250 */
- {pg_latin12wchar_with_len, pg_latin1_mblen, pg_latin1_dsplen, pg_latin1_verifier, 1}, /* PG_WIN1253 */
- {pg_latin12wchar_with_len, pg_latin1_mblen, pg_latin1_dsplen, pg_latin1_verifier, 1}, /* PG_WIN1254 */
- {pg_latin12wchar_with_len, pg_latin1_mblen, pg_latin1_dsplen, pg_latin1_verifier, 1}, /* PG_WIN1255 */
- {pg_latin12wchar_with_len, pg_latin1_mblen, pg_latin1_dsplen, pg_latin1_verifier, 1}, /* PG_WIN1257 */
- {pg_latin12wchar_with_len, pg_latin1_mblen, pg_latin1_dsplen, pg_latin1_verifier, 1}, /* PG_KOI8U */
- {0, pg_sjis_mblen, pg_sjis_dsplen, pg_sjis_verifier, 2}, /* PG_SJIS */
- {0, pg_big5_mblen, pg_big5_dsplen, pg_big5_verifier, 2}, /* PG_BIG5 */
- {0, pg_gbk_mblen, pg_gbk_dsplen, pg_gbk_verifier, 2}, /* PG_GBK */
- {0, pg_uhc_mblen, pg_uhc_dsplen, pg_uhc_verifier, 2}, /* PG_UHC */
- {0, pg_gb18030_mblen, pg_gb18030_dsplen, pg_gb18030_verifier, 4}, /* PG_GB18030 */
- {0, pg_johab_mblen, pg_johab_dsplen, pg_johab_verifier, 3}, /* PG_JOHAB */
- {0, pg_sjis_mblen, pg_sjis_dsplen, pg_sjis_verifier, 2} /* PG_SHIFT_JIS_2004 */
+ {pg_ascii2wchar_with_len, pg_wchar2single_with_len, pg_ascii_mblen, pg_ascii_dsplen, pg_ascii_verifier, 1}, /* PG_SQL_ASCII */
+ {pg_eucjp2wchar_with_len, pg_wchar2euc_with_len, pg_eucjp_mblen, pg_eucjp_dsplen, pg_eucjp_verifier, 3}, /* PG_EUC_JP */
+ {pg_euccn2wchar_with_len, pg_wchar2euc_with_len, pg_euccn_mblen, pg_euccn_dsplen, pg_euccn_verifier, 2}, /* PG_EUC_CN */
+ {pg_euckr2wchar_with_len, pg_wchar2euc_with_len, pg_euckr_mblen, pg_euckr_dsplen, pg_euckr_verifier, 3}, /* PG_EUC_KR */
+ {pg_euctw2wchar_with_len, pg_wchar2euc_with_len, pg_euctw_mblen, pg_euctw_dsplen, pg_euctw_verifier, 4}, /* PG_EUC_TW */
+ {pg_eucjp2wchar_with_len, pg_wchar2euc_with_len, pg_eucjp_mblen, pg_eucjp_dsplen, pg_eucjp_verifier, 3}, /* PG_EUC_JIS_2004 */
+ {pg_utf2wchar_with_len, pg_wchar2utf_with_len, pg_utf_mblen, pg_utf_dsplen, pg_utf8_verifier, 4}, /* PG_UTF8 */
+ {pg_mule2wchar_with_len, pg_wchar2mule_with_len, pg_mule_mblen, pg_mule_dsplen, pg_mule_verifier, 4}, /* PG_MULE_INTERNAL */
+ {pg_latin12wchar_with_len, pg_wchar2single_with_len, pg_latin1_mblen, pg_latin1_dsplen, pg_latin1_verifier, 1}, /* PG_LATIN1 */
+ {pg_latin12wchar_with_len, pg_wchar2single_with_len, pg_latin1_mblen, pg_latin1_dsplen, pg_latin1_verifier, 1}, /* PG_LATIN2 */
+ {pg_latin12wchar_with_len, pg_wchar2single_with_len, pg_latin1_mblen, pg_latin1_dsplen, pg_latin1_verifier, 1}, /* PG_LATIN3 */
+ {pg_latin12wchar_with_len, pg_wchar2single_with_len, pg_latin1_mblen, pg_latin1_dsplen, pg_latin1_verifier, 1}, /* PG_LATIN4 */
+ {pg_latin12wchar_with_len, pg_wchar2single_with_len, pg_latin1_mblen, pg_latin1_dsplen, pg_latin1_verifier, 1}, /* PG_LATIN5 */
+ {pg_latin12wchar_with_len, pg_wchar2single_with_len, pg_latin1_mblen, pg_latin1_dsplen, pg_latin1_verifier, 1}, /* PG_LATIN6 */
+ {pg_latin12wchar_with_len, pg_wchar2single_with_len, pg_latin1_mblen, pg_latin1_dsplen, pg_latin1_verifier, 1}, /* PG_LATIN7 */
+ {pg_latin12wchar_with_len, pg_wchar2single_with_len, pg_latin1_mblen, pg_latin1_dsplen, pg_latin1_verifier, 1}, /* PG_LATIN8 */
+ {pg_latin12wchar_with_len, pg_wchar2single_with_len, pg_latin1_mblen, pg_latin1_dsplen, pg_latin1_verifier, 1}, /* PG_LATIN9 */
+ {pg_latin12wchar_with_len, pg_wchar2single_with_len, pg_latin1_mblen, pg_latin1_dsplen, pg_latin1_verifier, 1}, /* PG_LATIN10 */
+ {pg_latin12wchar_with_len, pg_wchar2single_with_len, pg_latin1_mblen, pg_latin1_dsplen, pg_latin1_verifier, 1}, /* PG_WIN1256 */
+ {pg_latin12wchar_with_len, pg_wchar2single_with_len, pg_latin1_mblen, pg_latin1_dsplen, pg_latin1_verifier, 1}, /* PG_WIN1258 */
+ {pg_latin12wchar_with_len, pg_wchar2single_with_len, pg_latin1_mblen, pg_latin1_dsplen, pg_latin1_verifier, 1}, /* PG_WIN866 */
+ {pg_latin12wchar_with_len, pg_wchar2single_with_len, pg_latin1_mblen, pg_latin1_dsplen, pg_latin1_verifier, 1}, /* PG_WIN874 */
+ {pg_latin12wchar_with_len, pg_wchar2single_with_len, pg_latin1_mblen, pg_latin1_dsplen, pg_latin1_verifier, 1}, /* PG_KOI8R */
+ {pg_latin12wchar_with_len, pg_wchar2single_with_len, pg_latin1_mblen, pg_latin1_dsplen, pg_latin1_verifier, 1}, /* PG_WIN1251 */
+ {pg_latin12wchar_with_len, pg_wchar2single_with_len, pg_latin1_mblen, pg_latin1_dsplen, pg_latin1_verifier, 1}, /* PG_WIN1252 */
+ {pg_latin12wchar_with_len, pg_wchar2single_with_len, pg_latin1_mblen, pg_latin1_dsplen, pg_latin1_verifier, 1}, /* ISO-8859-5 */
+ {pg_latin12wchar_with_len, pg_wchar2single_with_len, pg_latin1_mblen, pg_latin1_dsplen, pg_latin1_verifier, 1}, /* ISO-8859-6 */
+ {pg_latin12wchar_with_len, pg_wchar2single_with_len, pg_latin1_mblen, pg_latin1_dsplen, pg_latin1_verifier, 1}, /* ISO-8859-7 */
+ {pg_latin12wchar_with_len, pg_wchar2single_with_len, pg_latin1_mblen, pg_latin1_dsplen, pg_latin1_verifier, 1}, /* ISO-8859-8 */
+ {pg_latin12wchar_with_len, pg_wchar2single_with_len, pg_latin1_mblen, pg_latin1_dsplen, pg_latin1_verifier, 1}, /* PG_WIN1250 */
+ {pg_latin12wchar_with_len, pg_wchar2single_with_len, pg_latin1_mblen, pg_latin1_dsplen, pg_latin1_verifier, 1}, /* PG_WIN1253 */
+ {pg_latin12wchar_with_len, pg_wchar2single_with_len, pg_latin1_mblen, pg_latin1_dsplen, pg_latin1_verifier, 1}, /* PG_WIN1254 */
+ {pg_latin12wchar_with_len, pg_wchar2single_with_len, pg_latin1_mblen, pg_latin1_dsplen, pg_latin1_verifier, 1}, /* PG_WIN1255 */
+ {pg_latin12wchar_with_len, pg_wchar2single_with_len, pg_latin1_mblen, pg_latin1_dsplen, pg_latin1_verifier, 1}, /* PG_WIN1257 */
+ {pg_latin12wchar_with_len, pg_wchar2single_with_len, pg_latin1_mblen, pg_latin1_dsplen, pg_latin1_verifier, 1}, /* PG_KOI8U */
+ {0, 0, pg_sjis_mblen, pg_sjis_dsplen, pg_sjis_verifier, 2}, /* PG_SJIS */
+ {0, 0, pg_big5_mblen, pg_big5_dsplen, pg_big5_verifier, 2}, /* PG_BIG5 */
+ {0, 0, pg_gbk_mblen, pg_gbk_dsplen, pg_gbk_verifier, 2}, /* PG_GBK */
+ {0, 0, pg_uhc_mblen, pg_uhc_dsplen, pg_uhc_verifier, 2}, /* PG_UHC */
+ {0, 0, pg_gb18030_mblen, pg_gb18030_dsplen, pg_gb18030_verifier, 4}, /* PG_GB18030 */
+ {0, 0, pg_johab_mblen, pg_johab_dsplen, pg_johab_verifier, 3}, /* PG_JOHAB */
+ {0, 0, pg_sjis_mblen, pg_sjis_dsplen, pg_sjis_verifier, 2} /* PG_SHIFT_JIS_2004 */
};
/* returns the byte length of a word for mule internal code */
diff --git a/src/include/mb/pg_wchar.h b/src/include/mb/pg_wchar.h
index 1d6d9554bd4..1bcdfbceb93 100644
--- a/src/include/mb/pg_wchar.h
+++ b/src/include/mb/pg_wchar.h
@@ -140,6 +140,10 @@ typedef unsigned int pg_wchar;
#define LCPRV1_A 0x9a
#define LCPRV1_B 0x9b
#define IS_LCPRV1(c) ((unsigned char)(c) == LCPRV1_A || (unsigned char)(c) == LCPRV1_B)
+#define IS_LCPRV1_A_RANGE(c) \
+ ((unsigned char)(c) >= 0xa0 && (unsigned char)(c) <= 0xdf)
+#define IS_LCPRV1_B_RANGE(c) \
+ ((unsigned char)(c) >= 0xe0 && (unsigned char)(c) <= 0xef)
/*
* Postgres-specific prefix bytes for "private" multibyte encodings
@@ -148,6 +152,10 @@ typedef unsigned int pg_wchar;
#define LCPRV2_A 0x9c
#define LCPRV2_B 0x9d
#define IS_LCPRV2(c) ((unsigned char)(c) == LCPRV2_A || (unsigned char)(c) == LCPRV2_B)
+#define IS_LCPRV2_A_RANGE(c) \
+ ((unsigned char)(c) >= 0xf0 && (unsigned char)(c) <= 0xf4)
+#define IS_LCPRV2_B_RANGE(c) \
+ ((unsigned char)(c) >= 0xf5 && (unsigned char)(c) <= 0xfe)
/*
* Charset IDs for private single byte encodings (0xa0-0xef)
@@ -324,7 +332,11 @@ extern pg_enc2gettext pg_enc2gettext_tbl[];
* pg_wchar stuff
*/
typedef int (*mb2wchar_with_len_converter) (const unsigned char *from,
- pg_wchar *to,
+ pg_wchar *to,
+ int len);
+
+typedef int (*wchar2mb_with_len_converter) (const pg_wchar *from,
+ unsigned char *to,
int len);
typedef int (*mblen_converter) (const unsigned char *mbstr);
@@ -337,8 +349,10 @@ typedef int (*mbverifier) (const unsigned char *mbstr, int len);
typedef struct
{
- mb2wchar_with_len_converter mb2wchar_with_len; /* convert a multibyte
- * string to a wchar */
+ mb2wchar_with_len_converter mb2wchar_with_len; /* convert a multibyte
+ * string to a wchar */
+ wchar2mb_with_len_converter wchar2mb_with_len; /* convert a wchar
+ * string to a multibyte */
mblen_converter mblen; /* get byte length of a char */
mbdisplaylen_converter dsplen; /* get display width of a char */
mbverifier mbverify; /* verify multibyte sequence */
@@ -419,6 +433,10 @@ extern int pg_mb2wchar(const char *from, pg_wchar *to);
extern int pg_mb2wchar_with_len(const char *from, pg_wchar *to, int len);
extern int pg_encoding_mb2wchar_with_len(int encoding,
const char *from, pg_wchar *to, int len);
+extern int pg_wchar2mb(const pg_wchar *from, char *to);
+extern int pg_wchar2mb_with_len(const pg_wchar *from, char *to, int len);
+extern int pg_encoding_wchar2mb_with_len(int encoding,
+ const pg_wchar *from, char *to, int len);
extern int pg_char_and_wchar_strcmp(const char *s1, const pg_wchar *s2);
extern int pg_wchar_strncmp(const pg_wchar *s1, const pg_wchar *s2, size_t n);
extern int pg_char_and_wchar_strncmp(const char *s1, const pg_wchar *s2, size_t n);
--
GitLab