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Implement following item in TODO:
* Reject character sequences those are not valid in their charset
This commit is contained in:
Tatsuo Ishii
parent
d7f3cbc288
commit
e1de3e0833
@ -6,7 +6,7 @@
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* WIN1250 client encoding support contributed by Pavel Behal
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* SJIS UDC (NEC selection IBM kanji) support contributed by Eiji Tokuya
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*
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* $Id: conv.c,v 1.27 2001/09/06 04:57:29 ishii Exp $
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* $Id: conv.c,v 1.28 2001/09/11 04:50:36 ishii Exp $
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*
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*
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*/
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@ -1,7 +1,7 @@
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/*
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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 1.19 2001/09/06 04:57:29 ishii Exp $
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* $Id: wchar.c,v 1.20 2001/09/11 04:50:36 ishii Exp $
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*
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* WIN1250 client encoding updated by Pavel Behal
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*
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@ -458,24 +458,24 @@ pg_big5_mblen(const unsigned char *s)
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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}, /* 0; PG_SQL_ASCII */
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{pg_eucjp2wchar_with_len, pg_eucjp_mblen}, /* 1; PG_EUC_JP */
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{pg_euccn2wchar_with_len, pg_euccn_mblen}, /* 2; PG_EUC_CN */
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{pg_euckr2wchar_with_len, pg_euckr_mblen}, /* 3; PG_EUC_KR */
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{pg_euctw2wchar_with_len, pg_euctw_mblen}, /* 4; PG_EUC_TW */
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{pg_utf2wchar_with_len, pg_utf_mblen}, /* 5; PG_UNICODE */
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{pg_mule2wchar_with_len, pg_mule_mblen}, /* 6; PG_MULE_INTERNAL */
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{pg_latin12wchar_with_len, pg_latin1_mblen}, /* 7; PG_LATIN1 */
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{pg_latin12wchar_with_len, pg_latin1_mblen}, /* 8; PG_LATIN2 */
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{pg_latin12wchar_with_len, pg_latin1_mblen}, /* 9; PG_LATIN3 */
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{pg_latin12wchar_with_len, pg_latin1_mblen}, /* 10; PG_LATIN4 */
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{pg_latin12wchar_with_len, pg_latin1_mblen}, /* 11; PG_LATIN5 */
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{pg_latin12wchar_with_len, pg_latin1_mblen}, /* 12; PG_KOI8 */
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{pg_latin12wchar_with_len, pg_latin1_mblen}, /* 13; PG_WIN1251 */
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{pg_latin12wchar_with_len, pg_latin1_mblen}, /* 14; PG_ALT */
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{0, pg_sjis_mblen}, /* 15; PG_SJIS */
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{0, pg_big5_mblen}, /* 17; PG_BIG5 */
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{pg_latin12wchar_with_len, pg_latin1_mblen} /* 18; PG_WIN1250 */
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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_utf2wchar_with_len, pg_utf_mblen, 3}, /* 5; PG_UNICODE */
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{pg_mule2wchar_with_len, pg_mule_mblen, 3}, /* 6; PG_MULE_INTERNAL */
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{pg_latin12wchar_with_len, pg_latin1_mblen, 1}, /* 7; PG_LATIN1 */
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{pg_latin12wchar_with_len, pg_latin1_mblen, 1}, /* 8; PG_LATIN2 */
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{pg_latin12wchar_with_len, pg_latin1_mblen, 1}, /* 9; PG_LATIN3 */
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{pg_latin12wchar_with_len, pg_latin1_mblen, 1}, /* 10; PG_LATIN4 */
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{pg_latin12wchar_with_len, pg_latin1_mblen, 1}, /* 11; PG_LATIN5 */
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{pg_latin12wchar_with_len, pg_latin1_mblen, 1}, /* 12; PG_KOI8 */
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{pg_latin12wchar_with_len, pg_latin1_mblen, 1}, /* 13; PG_WIN1251 */
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{pg_latin12wchar_with_len, pg_latin1_mblen, 1}, /* 14; PG_ALT */
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{0, pg_sjis_mblen, 2}, /* 15; PG_SJIS */
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{0, pg_big5_mblen, 2}, /* 17; PG_BIG5 */
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{pg_latin12wchar_with_len, pg_latin1_mblen, 1} /* 18; PG_WIN1250 */
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};
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/* returns the byte length of a word for mule internal code */
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@ -498,3 +498,68 @@ pg_encoding_mblen(int encoding, const unsigned char *mbstr)
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((*pg_wchar_table[encoding].mblen) (mbstr)) :
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((*pg_wchar_table[PG_SQL_ASCII].mblen) (mbstr)));
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}
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#ifndef FRONTEND
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/*
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* Verify mbstr to make sure that it has a valid character sequence.
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* mbstr is not necessarily NULL terminated. length of mbstr is
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* specified by len. If an error was found, returns an error message.
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* Note that the message is kept in a static buffer, the next invocation
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* might break the message.
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* If no error was found, this function returns NULL.
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*/
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char *
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pg_verifymbstr(const unsigned char *mbstr, int len)
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{
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int l;
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int i, j;
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static char buf[256];
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int slen = 0;
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/* we do not check single byte encodings */
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if (pg_wchar_table[GetDatabaseEncoding()].maxmblen <= 1)
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return NULL;
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while (len > 0 && *mbstr)
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{
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l = pg_mblen(mbstr);
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/* multi-byte letter? */
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if (l > 1)
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{
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for (i=1;i<l;i++)
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{
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if (i > len || *(mbstr+i) == '\0' ||
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/* we assume that every muti-byte letter
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* consists of bytes being the 8th bit set
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*/
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((*(mbstr+i) & 0x80) == 0))
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{
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int remains = sizeof(buf);
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char *p = buf;
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slen = snprintf(p, remains, "Invalid %s character sequence found (0x",
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GetDatabaseEncodingName());
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p += slen;
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remains -= slen;
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i = ((*(mbstr+i) & 0x80) == 0)?l:i;
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for (j=0;j<i;j++)
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{
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slen = snprintf(p, remains, "%02x",
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*(mbstr+j));
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p += slen;
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remains -= slen;
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}
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snprintf(p, remains, ")");
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return(buf);
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}
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}
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}
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len -= l;
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mbstr += l;
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}
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return NULL;
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}
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#endif
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@ -1,4 +1,4 @@
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/* $Id: pg_wchar.h,v 1.29 2001/09/06 04:57:29 ishii Exp $ */
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/* $Id: pg_wchar.h,v 1.30 2001/09/11 04:50:36 ishii Exp $ */
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#ifndef PG_WCHAR_H
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#define PG_WCHAR_H
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@ -182,6 +182,8 @@ typedef struct
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int (*mb2wchar_with_len) (); /* convert a multi-byte
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* string to a wchar */
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int (*mblen) (); /* returns the length of a multi-byte word */
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int maxmblen; /* max bytes for a letter in this charset */
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} pg_wchar_tbl;
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extern pg_wchar_tbl pg_wchar_table[];
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@ -240,6 +242,8 @@ extern unsigned char *pg_server_to_client(unsigned char *, int);
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extern unsigned short BIG5toCNS(unsigned short, unsigned char *);
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extern unsigned short CNStoBIG5(unsigned short, unsigned char);
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char *pg_verifymbstr(const unsigned char *, int);
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#endif /* MULTIBYTE */
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#endif /* PG_WCHAR_H */
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