Fixed bug in Informix define handling.

Author: Michael Meskes

src/interfaces/ecpg/ChangeLog

@@ -2229,5 +2229,9 @@ Tue, 14 Aug 2007 11:46:51 +0200
 Wed, 22 Aug 2007 08:41:33 +0200
 
 	- More cleaning up and removed some duplicates.
+
+Wed, 29 Aug 2007 15:41:58 +0200
+
+	- Fixed bug in Informix define handling.
 	- Set ecpg library version to 6.0.
 	- Set ecpg version to 4.4.

src/interfaces/ecpg/preproc/ecpg.c

@@ -1,4 +1,4 @@
-/* $PostgreSQL: pgsql/src/interfaces/ecpg/preproc/ecpg.c,v 1.100 2007/08/14 10:01:53 meskes Exp $ */
+/* $PostgreSQL: pgsql/src/interfaces/ecpg/preproc/ecpg.c,v 1.101 2007/08/29 13:58:13 meskes Exp $ */
 
 /* New main for ecpg, the PostgreSQL embedded SQL precompiler. */
 /* (C) Michael Meskes <meskes@postgresql.org> Feb 5th, 1998 */
@@ -212,11 +212,6 @@ main(int argc, char *const argv[])
 					char		informix_path[MAXPGPATH];
 
 					compat = (strcmp(optarg, "INFORMIX") == 0) ? ECPG_COMPAT_INFORMIX : ECPG_COMPAT_INFORMIX_SE;
-					/* system_includes = true; */
-					add_preprocessor_define("dec_t=decimal");
-					add_preprocessor_define("intrvl_t=interval");
-					add_preprocessor_define("dtime_t=timestamp");
-
 					get_pkginclude_path(my_exec_path, pkginclude_path);
 					snprintf(informix_path, MAXPGPATH, "%s/informix/esql", pkginclude_path);
 					add_include_path(informix_path);

src/interfaces/ecpg/preproc/pgc.l

@@ -12,7 +12,7 @@
  *
  *
  * IDENTIFICATION
- *	  $PostgreSQL: pgsql/src/interfaces/ecpg/preproc/pgc.l,v 1.154 2007/08/22 08:20:58 meskes Exp $
+ *	  $PostgreSQL: pgsql/src/interfaces/ecpg/preproc/pgc.l,v 1.155 2007/08/29 13:58:13 meskes Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -50,6 +50,7 @@ static void parse_include (void);
 static void check_escape_warning(void);
 static bool ecpg_isspace(char ch);
 static bool isdefine(void);
+static bool isinformixdefine(void);
 
 char *token_start;
 int state_before;
@@ -751,8 +752,10 @@ cppline			{space}*#(.*\\{space})*.*{newline}
 					}
 <C>{identifier} 	{
 						const ScanKeyword		*keyword;
-
-						if (INFORMIX_MODE || !isdefine())
+							
+						/* Informix uses SQL defines only in SQL space */
+						/* however, some defines have to be taken care of for compatibility */
+						if ((!INFORMIX_MODE || !isinformixdefine()) && !isdefine())
 						{
 							keyword = ScanCKeywordLookup(yytext);
 							if (keyword != NULL)
@@ -1332,6 +1335,36 @@ static bool isdefine(void)
 	return false;
 }
 
+static bool isinformixdefine(void)
+{
+	const char *new = NULL;
+
+	if (strcmp(yytext, "dec_t") == 0)
+		new = "decimal";
+	else if (strcmp(yytext, "intrvl_t") == 0)
+	        new = "interval";
+	else if (strcmp(yytext, "dtime_t") == 0)
+                new = "timestamp";
+
+	if (new)
+	{
+		struct _yy_buffer *yb;
+
+		yb = mm_alloc(sizeof(struct _yy_buffer));
+
+		yb->buffer =  YY_CURRENT_BUFFER;
+		yb->lineno = yylineno;
+		yb->filename = mm_strdup(input_filename);
+		yb->next = yy_buffer;
+		yy_buffer = yb;
+
+		yy_scan_string(new);
+		return true;
+	}
+
+	return false;
+}
+
 /*
  * Called before any actual parsing is done
  */