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Commite1de3e0

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committed
Implement following item in TODO:
* Reject character sequences those are not valid in their charset
1 parentd7f3cbc commite1de3e0

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3 files changed

+125
-56
lines changed

3 files changed

+125
-56
lines changed

‎src/backend/utils/mb/conv.c‎

Lines changed: 36 additions & 36 deletions
Original file line numberDiff line numberDiff line change
@@ -6,7 +6,7 @@
66
* WIN1250 client encoding support contributed by Pavel Behal
77
* SJIS UDC (NEC selection IBM kanji) support contributed by Eiji Tokuya
88
*
9-
* $Id: conv.c,v 1.27 2001/09/06 04:57:29 ishii Exp $
9+
* $Id: conv.c,v 1.28 2001/09/11 04:50:36 ishii Exp $
1010
*
1111
*
1212
*/
@@ -1633,48 +1633,48 @@ big5_to_utf(unsigned char *euc, unsigned char *utf, int len)
16331633
*/
16341634
pg_enconvpg_enconv_tbl[]=
16351635
{
1636-
{PG_SQL_ASCII,ascii2mic,mic2ascii,ascii2utf,utf2ascii},
1637-
{PG_EUC_JP,euc_jp2mic,mic2euc_jp,euc_jp_to_utf,utf_to_euc_jp},
1638-
{PG_EUC_CN,euc_cn2mic,mic2euc_cn,euc_cn_to_utf,utf_to_euc_cn},
1639-
{PG_EUC_KR,euc_kr2mic,mic2euc_kr,euc_kr_to_utf,utf_to_euc_kr},
1640-
{PG_EUC_TW,euc_tw2mic,mic2euc_tw,euc_tw_to_utf,utf_to_euc_tw},
1641-
{PG_UTF8,0,0,0,0},
1642-
{PG_MULE_INTERNAL,0,0,0,0},
1643-
{PG_LATIN1,latin12mic,mic2latin1,latin1_to_utf,utf_to_latin1},
1644-
{PG_LATIN2,latin22mic,mic2latin2,latin2_to_utf,utf_to_latin2},
1645-
{PG_LATIN3,latin32mic,mic2latin3,latin3_to_utf,utf_to_latin3},
1646-
{PG_LATIN4,latin42mic,mic2latin4,latin4_to_utf,utf_to_latin4},
1647-
{PG_LATIN5,iso2mic,mic2iso,latin5_to_utf,utf_to_latin5},
1648-
{PG_KOI8R,koi8r2mic,mic2koi8r,KOI8R_to_utf,utf_to_KOI8R},
1649-
{PG_WIN1251,win12512mic,mic2win1251,WIN1251_to_utf,utf_to_WIN1251},
1650-
{PG_ALT,alt2mic,mic2alt,ALT_to_utf,utf_to_ALT},
1651-
{PG_SJIS,sjis2mic,mic2sjis,sjis_to_utf,utf_to_sjis},
1636+
{PG_SQL_ASCII,ascii2mic,mic2ascii,ascii2utf,utf2ascii},
1637+
{PG_EUC_JP,euc_jp2mic,mic2euc_jp,euc_jp_to_utf,utf_to_euc_jp},
1638+
{PG_EUC_CN,euc_cn2mic,mic2euc_cn,euc_cn_to_utf,utf_to_euc_cn},
1639+
{PG_EUC_KR,euc_kr2mic,mic2euc_kr,euc_kr_to_utf,utf_to_euc_kr},
1640+
{PG_EUC_TW,euc_tw2mic,mic2euc_tw,euc_tw_to_utf,utf_to_euc_tw},
1641+
{PG_UTF8,0,0,0,0},
1642+
{PG_MULE_INTERNAL,0,0,0,0},
1643+
{PG_LATIN1,latin12mic,mic2latin1,latin1_to_utf,utf_to_latin1},
1644+
{PG_LATIN2,latin22mic,mic2latin2,latin2_to_utf,utf_to_latin2},
1645+
{PG_LATIN3,latin32mic,mic2latin3,latin3_to_utf,utf_to_latin3},
1646+
{PG_LATIN4,latin42mic,mic2latin4,latin4_to_utf,utf_to_latin4},
1647+
{PG_LATIN5,iso2mic,mic2iso,latin5_to_utf,utf_to_latin5},
1648+
{PG_KOI8R,koi8r2mic,mic2koi8r,KOI8R_to_utf,utf_to_KOI8R},
1649+
{PG_WIN1251,win12512mic,mic2win1251,WIN1251_to_utf,utf_to_WIN1251},
1650+
{PG_ALT,alt2mic,mic2alt,ALT_to_utf,utf_to_ALT},
1651+
{PG_SJIS,sjis2mic,mic2sjis,sjis_to_utf,utf_to_sjis},
16521652
{PG_BIG5,big52mic,mic2big5,big5_to_utf,utf_to_big5},
1653-
{PG_WIN1250,win12502mic,mic2win1250,0,0},
1653+
{PG_WIN1250,win12502mic,mic2win1250,0,0},
16541654
};
16551655

16561656
#else
16571657

16581658
pg_enconvpg_enconv_tbl[]=
16591659
{
1660-
{PG_SQL_ASCII,ascii2mic,mic2ascii,0,0},
1661-
{PG_EUC_JP,euc_jp2mic,mic2euc_jp,0,0},
1662-
{PG_EUC_CN,euc_cn2mic,mic2euc_cn,0,0},
1663-
{PG_EUC_KR,euc_kr2mic,mic2euc_kr,0,0},
1664-
{PG_EUC_TW,euc_tw2mic,mic2euc_tw,0,0},
1665-
{PG_UTF8,0,0,0,0},
1666-
{PG_MULE_INTERNAL,0,0,0,0},
1667-
{PG_LATIN1,latin12mic,mic2latin1,0,0},
1668-
{PG_LATIN2,latin22mic,mic2latin2,0,0},
1669-
{PG_LATIN3,latin32mic,mic2latin3,0,0},
1670-
{PG_LATIN4,latin42mic,mic2latin4,0,0},
1671-
{PG_LATIN5,iso2mic,mic2iso,0,0},
1672-
{PG_KOI8R,koi8r2mic,mic2koi8r,0,0},
1673-
{PG_WIN1251,win12512mic,mic2win1251,0,0},
1674-
{PG_ALT,alt2mic,mic2alt,0,0},
1675-
{PG_SJIS,sjis2mic,mic2sjis,0,0},
1676-
{PG_BIG5,big52mic,mic2big5,0,0},
1677-
{PG_WIN1250,win12502mic,mic2win1250,0,0},
1660+
{PG_SQL_ASCII,ascii2mic,mic2ascii,0,0},
1661+
{PG_EUC_JP,euc_jp2mic,mic2euc_jp,0,0},
1662+
{PG_EUC_CN,euc_cn2mic,mic2euc_cn,0,0},
1663+
{PG_EUC_KR,euc_kr2mic,mic2euc_kr,0,0},
1664+
{PG_EUC_TW,euc_tw2mic,mic2euc_tw,0,0},
1665+
{PG_UTF8,0,0,0,0},
1666+
{PG_MULE_INTERNAL,0,0,0,0},
1667+
{PG_LATIN1,latin12mic,mic2latin1,0,0},
1668+
{PG_LATIN2,latin22mic,mic2latin2,0,0},
1669+
{PG_LATIN3,latin32mic,mic2latin3,0,0},
1670+
{PG_LATIN4,latin42mic,mic2latin4,0,0},
1671+
{PG_LATIN5,iso2mic,mic2iso,0,0},
1672+
{PG_KOI8R,koi8r2mic,mic2koi8r,0,0},
1673+
{PG_WIN1251,win12512mic,mic2win1251,0,0},
1674+
{PG_ALT,alt2mic,mic2alt,0,0},
1675+
{PG_SJIS,sjis2mic,mic2sjis,0,0},
1676+
{PG_BIG5,big52mic,mic2big5,0,0},
1677+
{PG_WIN1250,win12502mic,mic2win1250,0,0},
16781678
};
16791679

16801680
#endif/* UNICODE_CONVERSION */

‎src/backend/utils/mb/wchar.c‎

Lines changed: 84 additions & 19 deletions
Original file line numberDiff line numberDiff line change
@@ -1,7 +1,7 @@
11
/*
22
* conversion functions between pg_wchar and multi-byte streams.
33
* Tatsuo Ishii
4-
* $Id: wchar.c,v 1.19 2001/09/06 04:57:29 ishii Exp $
4+
* $Id: wchar.c,v 1.20 2001/09/11 04:50:36 ishii Exp $
55
*
66
* WIN1250 client encoding updated by Pavel Behal
77
*
@@ -458,24 +458,24 @@ pg_big5_mblen(const unsigned char *s)
458458
}
459459

460460
pg_wchar_tblpg_wchar_table[]= {
461-
{pg_ascii2wchar_with_len,pg_ascii_mblen},/* 0; PG_SQL_ASCII */
462-
{pg_eucjp2wchar_with_len,pg_eucjp_mblen},/* 1; PG_EUC_JP */
463-
{pg_euccn2wchar_with_len,pg_euccn_mblen},/* 2; PG_EUC_CN */
464-
{pg_euckr2wchar_with_len,pg_euckr_mblen},/* 3; PG_EUC_KR */
465-
{pg_euctw2wchar_with_len,pg_euctw_mblen},/* 4; PG_EUC_TW */
466-
{pg_utf2wchar_with_len,pg_utf_mblen},/* 5; PG_UNICODE */
467-
{pg_mule2wchar_with_len,pg_mule_mblen},/* 6; PG_MULE_INTERNAL */
468-
{pg_latin12wchar_with_len,pg_latin1_mblen},/* 7; PG_LATIN1 */
469-
{pg_latin12wchar_with_len,pg_latin1_mblen},/* 8; PG_LATIN2 */
470-
{pg_latin12wchar_with_len,pg_latin1_mblen},/* 9; PG_LATIN3 */
471-
{pg_latin12wchar_with_len,pg_latin1_mblen},/* 10; PG_LATIN4 */
472-
{pg_latin12wchar_with_len,pg_latin1_mblen},/* 11; PG_LATIN5 */
473-
{pg_latin12wchar_with_len,pg_latin1_mblen},/* 12; PG_KOI8 */
474-
{pg_latin12wchar_with_len,pg_latin1_mblen},/* 13; PG_WIN1251 */
475-
{pg_latin12wchar_with_len,pg_latin1_mblen},/* 14; PG_ALT */
476-
{0,pg_sjis_mblen},/* 15; PG_SJIS */
477-
{0,pg_big5_mblen},/* 17; PG_BIG5 */
478-
{pg_latin12wchar_with_len,pg_latin1_mblen}/* 18; PG_WIN1250 */
461+
{pg_ascii2wchar_with_len,pg_ascii_mblen,1},/* 0; PG_SQL_ASCII */
462+
{pg_eucjp2wchar_with_len,pg_eucjp_mblen,3},/* 1; PG_EUC_JP */
463+
{pg_euccn2wchar_with_len,pg_euccn_mblen,3},/* 2; PG_EUC_CN */
464+
{pg_euckr2wchar_with_len,pg_euckr_mblen,3},/* 3; PG_EUC_KR */
465+
{pg_euctw2wchar_with_len,pg_euctw_mblen,3},/* 4; PG_EUC_TW */
466+
{pg_utf2wchar_with_len,pg_utf_mblen,3},/* 5; PG_UNICODE */
467+
{pg_mule2wchar_with_len,pg_mule_mblen,3},/* 6; PG_MULE_INTERNAL */
468+
{pg_latin12wchar_with_len,pg_latin1_mblen,1},/* 7; PG_LATIN1 */
469+
{pg_latin12wchar_with_len,pg_latin1_mblen,1},/* 8; PG_LATIN2 */
470+
{pg_latin12wchar_with_len,pg_latin1_mblen,1},/* 9; PG_LATIN3 */
471+
{pg_latin12wchar_with_len,pg_latin1_mblen,1},/* 10; PG_LATIN4 */
472+
{pg_latin12wchar_with_len,pg_latin1_mblen,1},/* 11; PG_LATIN5 */
473+
{pg_latin12wchar_with_len,pg_latin1_mblen,1},/* 12; PG_KOI8 */
474+
{pg_latin12wchar_with_len,pg_latin1_mblen,1},/* 13; PG_WIN1251 */
475+
{pg_latin12wchar_with_len,pg_latin1_mblen,1},/* 14; PG_ALT */
476+
{0,pg_sjis_mblen,2},/* 15; PG_SJIS */
477+
{0,pg_big5_mblen,2},/* 17; PG_BIG5 */
478+
{pg_latin12wchar_with_len,pg_latin1_mblen,1}/* 18; PG_WIN1250 */
479479
};
480480

481481
/* returns the byte length of a word for mule internal code */
@@ -498,3 +498,68 @@ pg_encoding_mblen(int encoding, const unsigned char *mbstr)
498498
((*pg_wchar_table[encoding].mblen) (mbstr)) :
499499
((*pg_wchar_table[PG_SQL_ASCII].mblen) (mbstr)));
500500
}
501+
502+
#ifndefFRONTEND
503+
/*
504+
* Verify mbstr to make sure that it has a valid character sequence.
505+
* mbstr is not necessarily NULL terminated. length of mbstr is
506+
* specified by len. If an error was found, returns an error message.
507+
* Note that the message is kept in a static buffer, the next invocation
508+
* might break the message.
509+
* If no error was found, this function returns NULL.
510+
*/
511+
char*
512+
pg_verifymbstr(constunsignedchar*mbstr,intlen)
513+
{
514+
intl;
515+
inti,j;
516+
staticcharbuf[256];
517+
intslen=0;
518+
519+
/* we do not check single byte encodings */
520+
if (pg_wchar_table[GetDatabaseEncoding()].maxmblen <=1)
521+
returnNULL;
522+
523+
while (len>0&&*mbstr)
524+
{
525+
l=pg_mblen(mbstr);
526+
527+
/* multi-byte letter? */
528+
if (l>1)
529+
{
530+
for (i=1;i<l;i++)
531+
{
532+
if (i>len||*(mbstr+i)=='\0'||
533+
/* we assume that every muti-byte letter
534+
* consists of bytes being the 8th bit set
535+
*/
536+
((*(mbstr+i)&0x80)==0))
537+
{
538+
intremains=sizeof(buf);
539+
char*p=buf;
540+
541+
slen=snprintf(p,remains,"Invalid %s character sequence found (0x",
542+
GetDatabaseEncodingName());
543+
p+=slen;
544+
remains-=slen;
545+
546+
i= ((*(mbstr+i)&0x80)==0)?l:i;
547+
548+
for (j=0;j<i;j++)
549+
{
550+
slen=snprintf(p,remains,"%02x",
551+
*(mbstr+j));
552+
p+=slen;
553+
remains-=slen;
554+
}
555+
snprintf(p,remains,")");
556+
return(buf);
557+
}
558+
}
559+
}
560+
len-=l;
561+
mbstr+=l;
562+
}
563+
returnNULL;
564+
}
565+
#endif

‎src/include/mb/pg_wchar.h‎

Lines changed: 5 additions & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -1,4 +1,4 @@
1-
/* $Id: pg_wchar.h,v 1.29 2001/09/06 04:57:29 ishii Exp $ */
1+
/* $Id: pg_wchar.h,v 1.30 2001/09/11 04:50:36 ishii Exp $ */
22

33
#ifndefPG_WCHAR_H
44
#definePG_WCHAR_H
@@ -182,6 +182,8 @@ typedef struct
182182
int(*mb2wchar_with_len) ();/* convert a multi-byte
183183
* string to a wchar */
184184
int(*mblen) ();/* returns the length of a multi-byte word */
185+
intmaxmblen;/* max bytes for a letter in this charset */
186+
185187
}pg_wchar_tbl;
186188

187189
externpg_wchar_tblpg_wchar_table[];
@@ -240,6 +242,8 @@ extern unsigned char *pg_server_to_client(unsigned char *, int);
240242
externunsigned shortBIG5toCNS(unsigned short,unsignedchar*);
241243
externunsigned shortCNStoBIG5(unsigned short,unsignedchar);
242244

245+
char*pg_verifymbstr(constunsignedchar*,int);
246+
243247
#endif/* MULTIBYTE */
244248

245249
#endif/* PG_WCHAR_H */

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