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CHECK/DEFAULT syntax (some tricks to get current scan position).

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This commit is contained in:
Vadim B. Mikheev 1997-08-20 01:50:06 +00:00
parent 4527172b80
commit 0c001f080b
1 changed files with 18 additions and 9 deletions
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27
src/backend/parser/scan.l
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@ -8,7 +8,7 @@
* *
* *
* IDENTIFICATION * IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/parser/scan.l,v 1.13 1997/06/29 17:29:14 momjian Exp $ * $Header: /cvsroot/pgsql/src/backend/parser/scan.l,v 1.14 1997/08/20 01:50:06 vadim Exp $
* *
*------------------------------------------------------------------------- *-------------------------------------------------------------------------
*/ */
@ -36,6 +36,10 @@
extern char *parseString; extern char *parseString;
extern char *parseCh; extern char *parseCh;
int CurScanPosition(void);
int DefaultStartPosition;
int CheckStartPosition;
/* some versions of lex define this as a macro */ /* some versions of lex define this as a macro */
#if defined(yywrap) #if defined(yywrap)
#undef yywrap #undef yywrap
@ -173,6 +177,10 @@ other .
keyword = ScanKeywordLookup((char*)yytext); keyword = ScanKeywordLookup((char*)yytext);
if (keyword != NULL) { if (keyword != NULL) {
if ( keyword->value == DEFAULT )
DefaultStartPosition = CurScanPosition () + yyleng + 1;
else if ( keyword->value == CHECK )
CheckStartPosition = CurScanPosition () + yyleng + 1;
return (keyword->value); return (keyword->value);
} else { } else {
yylval.str = pstrdup((char*)yytext); yylval.str = pstrdup((char*)yytext);
@ -240,6 +248,12 @@ unput(char c)
*--parseCh = c; *--parseCh = c;
} }
} }
int
CurScanPosition(void)
{
return (parseCh - parseString - yyleng - 1);
}
#endif /* !defined(FLEX_SCANNER) */ #endif /* !defined(FLEX_SCANNER) */
#ifdef FLEX_SCANNER #ifdef FLEX_SCANNER
@ -265,16 +279,11 @@ myinput(char* buf, int max)
} }
} }
#ifdef NOT_USED int
char* CurScanPosition(void)
CurScan(void)
{ {
/* return (yy_c_buf_p - yy_current_buffer->yy_ch_buf - yyleng);
return (InputFrag ? InputFrag : parseCh) +
(yy_c_buf_p - &yy_current_buffer->yy_ch_buf[yy_n_chars]);
*/
} }
#endif
#endif /* FLEX_SCANNER */ #endif /* FLEX_SCANNER */