Fix usage of char2wchar/wchar2char. Changes:

- pg_wchar and wchar_t could have different size, so char2wchar
  doesn't call pg_mb2wchar_with_len to prevent out-of-bound
  memory bug
- make char2wchar/wchar2char symmetric, now they should not be
  called with C-locale because mbstowcs/wcstombs oftenly doesn't
  work correct with C-locale.
- Text parser uses pg_mb2wchar_with_len directly in case of
  C-locale and multibyte encoding

Per bug report by Hiroshi Inoue <inoue@tpf.co.jp> and
following discussion.

Backpatch up to 8.2 when multybyte support was implemented in tsearch.

diff --git a/contrib/tsearch2/ts_locale.c b/contrib/tsearch2/ts_locale.c
index cb022d7e2a46458b2d0def4819cfb6a5f8e23fcc..46e6a1ac00752055821a18d6baa7dc941cf75d5c 100644 (file)
--- a/contrib/tsearch2/ts_locale.c
+++ b/contrib/tsearch2/ts_locale.c
@@ -64,15 +64,8 @@ char2wchar(wchar_t *to, const char *from, size_t len)
    }
    else 
 #endif /* WIN32 */
-   if ( lc_ctype_is_c() )
-   {
-       /*
-        * pg_mb2wchar_with_len always adds trailing '\0', so 
-        * 'to' should be allocated with sufficient space 
-        */
-       return pg_mb2wchar_with_len(from, (pg_wchar *)to, len);
-   }
 
+   Assert( !lc_ctype_is_c() );
    return mbstowcs(to, from, len);
 }
 

diff --git a/contrib/tsearch2/wordparser/parser.c b/contrib/tsearch2/wordparser/parser.c
index af58f59a9946b1d7693b3a7fbb8c9bfec18fe16b..19b2cfd228e63bf073733db0c77ebdde66b520e7 100644 (file)
--- a/contrib/tsearch2/wordparser/parser.c
+++ b/contrib/tsearch2/wordparser/parser.c
@@ -1,4 +1,4 @@
-/* $PostgreSQL: pgsql/contrib/tsearch2/wordparser/parser.c,v 1.11.2.2 2007/03/22 15:59:09 teodor Exp $ */
+/* $PostgreSQL: pgsql/contrib/tsearch2/wordparser/parser.c,v 1.11.2.3 2009/03/02 15:13:17 teodor Exp $ */
 
 #include "postgres.h"
 
@@ -46,12 +46,24 @@ TParserInit(char *str, int len)
    if (prs->charmaxlen > 1)
    {
        prs->usewide = true;
-       prs->wstr = (wchar_t *) palloc(sizeof(wchar_t) * (prs->lenstr+1));
-       prs->lenwstr = char2wchar(prs->wstr, prs->str, prs->lenstr);
+       if ( lc_ctype_is_c() )
+       {
+           /*
+            * char2wchar doesn't work for C-locale and
+            * sizeof(pg_wchar) could be not equal to sizeof(wchar_t)
+            */
+           prs->pgwstr = (pg_wchar*) palloc(sizeof(pg_wchar) * (prs->lenstr + 1));
+           pg_mb2wchar_with_len(prs->str, prs->pgwstr, prs->lenstr);
+       }
+       else
+       {
+           prs->wstr = (wchar_t *) palloc(sizeof(wchar_t) * (prs->lenstr+1));
+           prs->lenwstr = char2wchar(prs->wstr, prs->str, prs->lenstr);
+       }
    }
    else
-#endif
        prs->usewide = false;
+#endif
 
    prs->state = newTParserPosition(NULL);
    prs->state->state = TPS_Base;
@@ -73,17 +85,21 @@ TParserClose(TParser * prs)
 #ifdef TS_USE_WIDE
    if (prs->wstr)
        pfree(prs->wstr);
+   if (prs->pgwstr)
+       pfree(prs->pgwstr);
 #endif
 
    pfree(prs);
 }
 
 /*
- * defining support function, equvalent is* macroses, but
- * working with any possible encodings and locales. Note,
- * that with multibyte encoding and C-locale isw* function may fail
- * or give wrong result. Note 2: multibyte encoding and C-locale 
- * often are used for Asian languages.
+ * Character-type support functions, equivalent to is* macros, but
+ * working with any possible encodings and locales. Notes:
+ *  - with multibyte encoding and C-locale isw* function may fail
+ *    or give wrong result. 
+ *  - multibyte encoding and C-locale often are used for 
+ *    Asian languages.
+ *  - if locale is C the we use pgwstr instead of wstr
  */
 
 #ifdef TS_USE_WIDE
@@ -94,8 +110,8 @@ p_is##type(TParser *prs) {                                                   \
    Assert( prs->state );                                                   \
    if ( prs->usewide )                                                     \
    {                                                                       \
-       if ( lc_ctype_is_c() )                                              \
-           return is##type( 0xff & *( prs->wstr + prs->state->poschar) );  \
+       if ( prs->pgwstr )                                                  \
+           return is##type( 0xff & *( prs->pgwstr + prs->state->poschar) );\
                                                                            \
        return isw##type( *(wint_t*)( prs->wstr + prs->state->poschar ) );  \
    }                                                                       \
@@ -115,9 +131,9 @@ p_isalnum(TParser *prs)
 
    if (prs->usewide)
    {
-       if (lc_ctype_is_c())
+       if (prs->pgwstr)
        {
-           unsigned int c = *(prs->wstr + prs->state->poschar);
+           unsigned int c = *(prs->pgwstr + prs->state->poschar);
 
            /*
             * any non-ascii symbol with multibyte encoding
@@ -148,9 +164,9 @@ p_isalpha(TParser *prs)
 
    if (prs->usewide)
    {
-       if (lc_ctype_is_c())
+       if (prs->pgwstr)
        {
-           unsigned int c = *(prs->wstr + prs->state->poschar);
+           unsigned int c = *(prs->pgwstr + prs->state->poschar);
 
            /*
             * any non-ascii symbol with multibyte encoding

diff --git a/contrib/tsearch2/wordparser/parser.h b/contrib/tsearch2/wordparser/parser.h
index c40717a80f82de1f723e8b1a3d0dc9bc676dd6c3..67c30904952d2bfdfec00519b053e8df0b63da6f 100644 (file)
--- a/contrib/tsearch2/wordparser/parser.h
+++ b/contrib/tsearch2/wordparser/parser.h
@@ -1,4 +1,4 @@
-/* $PostgreSQL: pgsql/contrib/tsearch2/wordparser/parser.h,v 1.11 2006/03/11 04:38:30 momjian Exp $ */
+/* $PostgreSQL: pgsql/contrib/tsearch2/wordparser/parser.h,v 1.11.2.1 2009/03/02 15:13:17 teodor Exp $ */
 
 #ifndef __PARSER_H__
 #define __PARSER_H__
@@ -138,12 +138,13 @@ typedef struct TParser
    int         lenstr;         /* length of mbstring */
 #ifdef TS_USE_WIDE
    wchar_t    *wstr;           /* wide character string */
+   pg_wchar   *pgwstr;         /* wide character string for C-locale */
    int         lenwstr;        /* length of wsting */
+   bool        usewide;
 #endif
 
    /* State of parse */
    int         charmaxlen;
-   bool        usewide;
    TParserPosition *state;
    bool        ignore;
    bool        wanthost;