Change addlit() to not assume its input is null-terminated, so that we

don't have more bugs like the quote-quote-quote-quote one.  Propagate
fix into ecpg lexer, too.

src/backend/parser/scan.l

@@ -9,7 +9,7 @@
  *
  *
  * IDENTIFICATION
- *	  $Header: /cvsroot/pgsql/src/backend/parser/scan.l,v 1.89 2001/09/04 00:19:39 petere Exp $
+ *	  $Header: /cvsroot/pgsql/src/backend/parser/scan.l,v 1.90 2001/09/07 23:17:14 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -69,6 +69,8 @@ void unput(char);
 
 extern YYSTYPE yylval;
 
+static int		xcdepth = 0;	/* depth of nesting in slash-star comments */
+
 /*
  * literalbuf is used to accumulate literal values when multiple rules
  * are needed to parse a single literal.  Call startlit to reset buffer
@@ -79,8 +81,6 @@ static char	   *literalbuf;		/* expandable buffer */
 static int		literallen;		/* actual current length */
 static int		literalalloc;	/* current allocated buffer size */
 
-static int		xcdepth = 0;	/* depth of nesting in slash-star comments */
-
 #define startlit()  (literalbuf[0] = '\0', literallen = 0)
 static void addlit(char *ytext, int yleng);
 
@@ -375,7 +375,7 @@ other			.
 					return IDENT;
 				}
 <xd>{xddouble} {
-					addlit(yytext+1, yyleng-1);
+					addlit(yytext, yyleng-1);
 				}
 <xd>{xdinside}	{
 					addlit(yytext, yyleng);
@@ -581,9 +581,10 @@ addlit(char *ytext, int yleng)
 		} while ((literallen+yleng) >= literalalloc);
 		literalbuf = (char *) repalloc(literalbuf, literalalloc);
 	}
-	/* append data --- note we assume ytext is null-terminated */
-	memcpy(literalbuf+literallen, ytext, yleng+1);
+	/* append new data, add trailing null */
+	memcpy(literalbuf+literallen, ytext, yleng);
 	literallen += yleng;
+	literalbuf[literallen] = '\0';
 }
 
 #if !defined(FLEX_SCANNER)

src/interfaces/ecpg/preproc/pgc.l

@@ -12,7 +12,7 @@
  *
  *
  * IDENTIFICATION
- *	  $Header: /cvsroot/pgsql/src/interfaces/ecpg/preproc/pgc.l,v 1.79 2001/06/13 12:38:58 meskes Exp $
+ *	  $Header: /cvsroot/pgsql/src/interfaces/ecpg/preproc/pgc.l,v 1.80 2001/09/07 23:17:14 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -35,6 +35,8 @@
 
 extern YYSTYPE yylval;
 
+static int		xcdepth = 0;	/* depth of nesting in slash-star comments */
+
 /*
  * literalbuf is used to accumulate literal values when multiple rules
  * are needed to parse a single literal.  Call startlit to reset buffer
@@ -45,8 +47,6 @@ static char	   *literalbuf = NULL;		/* expandable buffer */
 static int		literallen;		/* actual current length */
 static int		literalalloc;	/* current allocated buffer size */
 
-static int             xcdepth = 0; 
-
 #define startlit()  (literalbuf[0] = '\0', literallen = 0)
 static void addlit(char *ytext, int yleng);
 
@@ -923,9 +923,10 @@ addlit(char *ytext, int yleng)
 		} while ((literallen+yleng) >= literalalloc);
 		literalbuf = (char *) realloc(literalbuf, literalalloc);
 	}
-	/* append data --- note we assume ytext is null-terminated */
-	memcpy(literalbuf+literallen, ytext, yleng+1);
+	/* append new data, add trailing null */
+	memcpy(literalbuf+literallen, ytext, yleng);
 	literallen += yleng;
+	literalbuf[literallen] = '\0';
 }
 
 int yywrap(void)