Parse forward definiton of structs.

Michael Meskes · Michael Meskes · commit bbe990222365 · 2003-05-29T12:00:22.000Z
diff --git a/src/interfaces/ecpg/ChangeLog b/src/interfaces/ecpg/ChangeLog
@@ -1449,6 +1449,10 @@ Tue May 27 13:29:28 CEST 2003
 Tue May 27 16:33:36 CEST 2003
 
 	- Accept stdin/stdout as input/output file.
+	
+Thu May 29 13:58:25 CEST 2003
+
+	- ecpg should now be able to parse forward struct definition.
 	- Set ecpg version to 2.12.0.
 	- Set ecpg library to 3.4.2.
 	- Set pgtypes library to 1.0.0
diff --git a/src/interfaces/ecpg/preproc/pgc.l b/src/interfaces/ecpg/preproc/pgc.l
@@ -12,7 +12,7 @@
  *
  *
  * IDENTIFICATION
- *	  $Header: /cvsroot/pgsql/src/interfaces/ecpg/preproc/pgc.l,v 1.111 2003/05/27 14:36:00 meskes Exp $
+ *	  $Header: /cvsroot/pgsql/src/interfaces/ecpg/preproc/pgc.l,v 1.112 2003/05/29 12:00:21 meskes Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -184,6 +184,7 @@ letter_or_digit [\200-\377_A-Za-z0-9]
 
 identifier		{letter}{letter_or_digit}*
 
+array			({letter_or_digit}|[\+\-\*\%\/\(\)])*
 typecast		"::"
 
 /*
@@ -949,96 +950,7 @@ cppline			{space}*#(.*\\{space})+.*
 
 <incl>\<[^\>]+\>{space}*";"?		{	parse_include(); }
 <incl>{dquote}{xdinside}{dquote}{space}*";"?	{	parse_include(); }
-<incl>[^;\<\>\"]+";"		{
-				parse_include();
-#if 0
-						/* got the include file name */
-						struct _yy_buffer *yb;
-					  	struct _include_path *ip;
-					  	char inc_file[MAXPGPATH];
-					  	unsigned int i;
-
-					  	yb = mm_alloc(sizeof(struct _yy_buffer));
-
-					  	yb->buffer =	YY_CURRENT_BUFFER;
-					  	yb->lineno = yylineno;
-					  	yb->filename = input_filename;
-					  	yb->next = yy_buffer;
-
-					  	yy_buffer = yb;
-
-					  	/*
-						 * skip the ";" and trailing whitespace. Note that yytext contains
-						 * at least one non-space character plus the ";" 
-						 */
-					  	for ( i = strlen(yytext)-2;
-							i > 0 && isspace((unsigned char) yytext[i]);
-							i-- )
-					  		{}
-
-						yytext[i+1] = '\0';
-						yyin = NULL;
-
-						/* If file name is enclosed in '"' remove these and look only in '.' */
-						/* Informix does look into all include paths though, except filename starts with '/' */
-						if ((yytext[0] == '"' && yytext[i] == '"') && (compat != ECPG_COMPAT_INFORMIX || yytext[0] == '/'))
-						{
-							yytext[i] = '\0';
-							memmove(yytext, yytext+1, strlen(yytext));
-						
-							strncpy(inc_file, yytext, sizeof(inc_file));
-							yyin = fopen(inc_file, "r");
-							if (!yyin)
-							{
-								if (strcmp(inc_file + strlen(inc_file) - 2, ".h"))
-								{
-									strcat(inc_file, ".h");
-									yyin = fopen(inc_file, "r");
-								}
-							}
-							
-						}
-						else
-						{
-							if (yytext[0] == '"' && yytext[i] == '"')
-							{
-								yytext[i] = '\0';
-								memmove(yytext, yytext+1, strlen(yytext));
-							}
-							
-						  	for (ip = include_paths; yyin == NULL && ip != NULL; ip = ip->next)
-						  	{
-								if (strlen(ip->path) + strlen(yytext) + 3 > MAXPGPATH)
-								{
-									fprintf(stderr, "Error: Path %s/%s is too long in line %d, skipping.\n", ip->path, yytext, yylineno);
-									continue;
-								}
-								snprintf (inc_file, sizeof(inc_file), "%s/%s", ip->path, yytext);
-								yyin = fopen(inc_file, "r");
-								if (!yyin)
-								{
-									if (strcmp(inc_file + strlen(inc_file) - 2, ".h"))
-									{
-										strcat(inc_file, ".h");
-										yyin = fopen( inc_file, "r" );
-									}
-								}
-							}
-						}
-						if (!yyin)
-						{
-							snprintf(errortext, sizeof(errortext), "Cannot open include file %s in line %d\n", yytext, yylineno);
-							mmerror(NO_INCLUDE_FILE, ET_FATAL, errortext);
-					  	}
-
-						input_filename = mm_strdup(inc_file);
-						yy_switch_to_buffer(yy_create_buffer(yyin,YY_BUF_SIZE ));
-						yylineno = 1;
-						output_line_number();
-
-					  	BEGIN C;
-#endif
-					}
+<incl>[^;\<\>\"]+";"		{ parse_include(); }
 
 <<EOF>>				{
 				  		if (yy_buffer == NULL) {
diff --git a/src/interfaces/ecpg/preproc/preproc.y b/src/interfaces/ecpg/preproc/preproc.y
@@ -1,4 +1,4 @@
-/* $Header: /cvsroot/pgsql/src/interfaces/ecpg/preproc/Attic/preproc.y,v 1.223 2003/05/27 11:31:52 meskes Exp $ */
+/* $Header: /cvsroot/pgsql/src/interfaces/ecpg/preproc/Attic/preproc.y,v 1.224 2003/05/29 12:00:21 meskes Exp $ */
 
 /* Copyright comment */
 %{
@@ -27,6 +27,9 @@ struct ECPGstruct_member *struct_member_list[STRUCT_DEPTH] = { NULL };
 /* also store struct type so we can do a sizeof() later */
 static char *ECPGstruct_sizeof = NULL;
 
+/* for forward declarations we have to store some data as well */
+static char *forward_name = NULL;
+
 struct ECPGtype ecpg_no_indicator = {ECPGt_NO_INDICATOR, 0L, NULL, {NULL}};
 struct variable no_indicator = {"no_indicator", &ecpg_no_indicator, 0, NULL};
 
@@ -196,6 +199,7 @@ create_questionmarks(char *name, bool array)
 	enum	ECPGttype	type_enum;
 	enum	ECPGdtype	dtype_enum;
 	struct	fetch_desc	descriptor;
+	struct  su_symbol	struct_union;
 }
 
 /* special embedded SQL token */
@@ -440,7 +444,9 @@ create_questionmarks(char *name, bool array)
 %type  <str>	reserved_keyword unreserved_keyword ecpg_interval
 %type  <str>	col_name_keyword func_name_keyword precision opt_scale
 %type  <str>	ECPGTypeName variablelist ECPGColLabelCommon c_variable
-%type  <str>	s_struct_union_symbol inf_val_list inf_col_list
+%type  <str>	inf_val_list inf_col_list
+
+%type  <struct_union> s_struct_union_symbol
 
 %type  <descriptor> ECPGGetDescriptor
 
@@ -4039,7 +4045,6 @@ connection_target: database_name opt_server opt_port
 		}
 		| StringConst
 		{
-			printf("MM: %s\n", $1);
 			if ($1[0] == '\"')
 				$$ = $1;
 			else if (strcmp($1, " ?") == 0) /* variable */
@@ -4425,16 +4430,34 @@ single_vt_type: common_type
 		| s_struct_union_symbol
 		{
 			/* this is for named structs/unions */
-			char *name = $1;
-			struct typedefs *this = get_typedef(name);
-
-			$$.type_str = mm_strdup(this->name);
-			$$.type_enum = this->type->type_enum;
-			$$.type_dimension = this->type->type_dimension;
-			$$.type_index = this->type->type_index;
-			$$.type_sizeof = this->type->type_sizeof;
-			struct_member_list[struct_level] = ECPGstruct_member_dup(this->struct_member_list);
-			free(name);
+			char *name;
+			struct typedefs *this;
+			bool forward = (strcmp($1.symbol, forward_name) == 0 && strcmp($1.su, "struct") == 0);
+
+			name = cat2_str($1.su, $1.symbol);
+			/* Do we have a forward definition? */
+			if (!forward)
+			{
+				/* No */
+				
+				this = get_typedef(name);
+				$$.type_str = mm_strdup(this->name);
+				$$.type_enum = this->type->type_enum;
+				$$.type_dimension = this->type->type_dimension;
+				$$.type_index = this->type->type_index;
+				$$.type_sizeof = this->type->type_sizeof;
+				struct_member_list[struct_level] = ECPGstruct_member_dup(this->struct_member_list);
+				free(name);
+			}
+			else
+			{
+				$$.type_str = name;
+                                $$.type_enum = ECPGt_long;
+                                $$.type_dimension = make_str("-1");
+                                $$.type_index = make_str("-1");
+                                $$.type_sizeof = make_str("");
+                                struct_member_list[struct_level] = NULL;
+			}
 		}
 		;
 
@@ -4761,15 +4784,34 @@ var_type:	common_type
 		| s_struct_union_symbol
 		{
 			/* this is for named structs/unions */
-			char *name = $1;
-			struct typedefs *this = get_typedef(name);
-			$$.type_str = mm_strdup(this->name);
-			$$.type_enum = this->type->type_enum;
-			$$.type_dimension = this->type->type_dimension;
-			$$.type_index = this->type->type_index;
-			$$.type_sizeof = this->type->type_sizeof;
-			struct_member_list[struct_level] = ECPGstruct_member_dup(this->struct_member_list);
-			free(name);
+			char *name;
+			struct typedefs *this;
+			bool forward = (strcmp($1.symbol, forward_name) == 0 && strcmp($1.su, "struct") == 0);
+
+			name = cat2_str($1.su, $1.symbol);
+			/* Do we have a forward definition? */
+			if (!forward)
+			{
+				/* No */
+				
+				this = get_typedef(name);
+				$$.type_str = mm_strdup(this->name);
+				$$.type_enum = this->type->type_enum;
+				$$.type_dimension = this->type->type_dimension;
+				$$.type_index = this->type->type_index;
+				$$.type_sizeof = this->type->type_sizeof;
+				struct_member_list[struct_level] = ECPGstruct_member_dup(this->struct_member_list);
+				free(name);
+			}
+			else
+			{
+				$$.type_str = name;
+                                $$.type_enum = ECPGt_long;
+                                $$.type_dimension = make_str("-1");
+                                $$.type_index = make_str("-1");
+                                $$.type_sizeof = make_str("");
+                                struct_member_list[struct_level] = NULL;
+			}
 		}
 		;
 
@@ -4789,18 +4831,21 @@ struct_union_type_with_symbol: s_struct_union_symbol
 			struct_member_list[struct_level++] = NULL;
 			if (struct_level >= STRUCT_DEPTH)
 				 mmerror(PARSE_ERROR, ET_ERROR, "Too many levels in nested structure/union definition");
+			forward_name = mm_strdup($1.symbol);
 		} 
 		'{' variable_declarations '}'
 		{
 			ECPGfree_struct_member(struct_member_list[struct_level]);
 			struct_member_list[struct_level] = NULL;
 			free(actual_storage[struct_level--]);
-			if (strncmp($1, "struct", sizeof("struct")-1) == 0)
+			if (strncmp($1.su, "struct", sizeof("struct")-1) == 0)
 				$$.type_enum = ECPGt_struct;
 			else
 				$$.type_enum = ECPGt_union;
-			$$.type_str = mm_strdup($1);
-			$$.type_sizeof = cat_str(4, $1, make_str("{"), $4, make_str("}"));
+			$$.type_str = cat2_str($1.su, $1.symbol);
+			$$.type_sizeof = cat_str(4, mm_strdup($$.type_str), make_str("{"), $4, make_str("}"));
+			free(forward_name);
+			forward_name = NULL;
 		}
 		;
 
@@ -4822,12 +4867,14 @@ struct_union_type: struct_union_type_with_symbol	{ $$ = $1.type_sizeof; }
 
 s_struct_union_symbol: SQL_STRUCT symbol
 		{
-			$$ = cat2_str(make_str("struct"), $2);
-			ECPGstruct_sizeof = cat_str(3, make_str("sizeof("), strdup($$), make_str(")")); 
+			$$.su = make_str("struct");
+			$$.symbol = $2;
+			ECPGstruct_sizeof = cat_str(3, make_str("sizeof("), cat2_str(mm_strdup($$.su), mm_strdup($$.symbol)), make_str(")")); 
 		}
 		| UNION symbol
 		{
-			$$ = cat2_str(make_str("union"), $2);
+			$$.su = make_str("union");
+			$$.symbol = $2;
 		}
 		;
 
diff --git a/src/interfaces/ecpg/preproc/type.c b/src/interfaces/ecpg/preproc/type.c
@@ -225,16 +225,21 @@ ECPGdump_a_type(FILE *o, const char *name, struct ECPGtype * type,
 		case ECPGt_array:
 			if (indicator_set && ind_type->type != ECPGt_array)
 				mmerror(INDICATOR_NOT_ARRAY, ET_FATAL, "Indicator for array/pointer has to be array/pointer.\n");
-
 			switch (type->u.element->type)
 			{
 				case ECPGt_array:
 					mmerror(PARSE_ERROR, ET_ERROR, "No nested arrays allowed (except strings)");		/* array of array */
 					break;
 				case ECPGt_struct:
 				case ECPGt_union:
-					/* If var_array_element is not equal                                                                                                                                   * NULL, we have to use the                                                                                                                                            * <var_array_element>th entry and not                                                                                                                                 * the whole array */                                                                                                                                                 if (var_array_element == NULL)
-						ECPGdump_a_struct(o, name, ind_name, type->size,
+					/* If var_array_element is not equal
+					 * NULL, we have to use the
+					 * <var_array_element>th entry and
+					 * not the whole array */
+					if (var_array_element == NULL)
+						ECPGdump_a_struct(o, name,
+								ind_name,
+								type->size,
 								type->u.element,
 								(ind_type->type == ECPGt_NO_INDICATOR) ? ind_type : ind_type->u.element,
 								NULL, prefix, ind_prefix);
diff --git a/src/interfaces/ecpg/preproc/type.h b/src/interfaces/ecpg/preproc/type.h
@@ -88,6 +88,12 @@ struct index
 	char	*str;
 };
 
+struct su_symbol
+{
+	char	*su;
+	char 	*symbol;
+};
+
 struct this_type
 {
 	enum ECPGttype type_enum;
diff --git a/src/interfaces/ecpg/preproc/variable.c b/src/interfaces/ecpg/preproc/variable.c
