work on generated C code

11 files changed, 736 insertions, 80 deletions

diff --git a/src/backend/backend.c b/src/backend/backend.c
index 122e84c..6646e6c 100644
--- a/src/backend/backend.c
+++ b/src/backend/backend.c
@@ -6,6 +6,7 @@
 struct State_And_Transitions** extract_transition_table(struct AST_States *states,struct AST_Transitions *transitions)
 {
 	struct State_And_Transitions **ret;
+	struct AST_State *hold_state;
 	struct Queue *qs;
 	size_t i;
 
@@ -18,7 +19,13 @@ struct State_And_Transitions** extract_transition_table(struct AST_States *state
 
 	/*traverse transitions and push them into the queue of their coresponding state*/
 	for(i=0;i<transitions->size;++i)
-		Queue_Push(qs+transitions->transitions[i]->from->number,transitions->transitions[i]);
+	{
+		hold_state=extract_state(transitions->transitions[i]->from,states);
+
+		assert(hold_state!=NULL);
+
+		Queue_Push(qs+hold_state->number,transitions->transitions[i]);
+	}
 
 	/*condense the queues into the arrays*/
 	for(i=0;i<states->number_of_states;++i)
@@ -34,4 +41,111 @@ struct State_And_Transitions** extract_transition_table(struct AST_States *state
 	return ret;
 }
 
+_Bool expression_is_binary(struct AST* expression)
+{
+	return (expression->type==AST_TYPE_OP_OR || expression->type==AST_TYPE_OP_AND);
+}
+_Bool expression_is_unary(struct AST* expression)
+{
+	return (expression->type==AST_TYPE_OP_NOT);
+}
+_Bool state_is_in_states(struct AST_State *state,struct AST_States *states)
+{
+	return state==Map_Check(states->states_map,state->name->data,state->name->size);
+}
+
+struct AST_State* extract_state(struct AST *expression,struct AST_States *states)
+{
+	struct AST_State *hold_state;
+
+	assert(expression->type==AST_TYPE_OP_NOT || expression->type==AST_TYPE_OP_AND || expression->type==AST_TYPE_OP_OR
+			|| expression->type==AST_TYPE_STATE );
+	
+	if(expression->type==AST_TYPE_STATE)
+	{
+		if(state_is_in_states((struct AST_State*)expression,states))
+			return (struct AST_State*)expression;
+		else
+			return NULL;
+	}else if(expression_is_binary(expression))
+	{
+		hold_state=extract_state(((struct AST_Binary_Expression*)expression)->left,states);
+		if(hold_state)
+			return hold_state;
+		else
+			return extract_state(((struct AST_Binary_Expression*)expression)->right,states);
+	}else 
+	{
+		return extract_state(((struct AST_Unary_Expression*)expression)->operand,states);
+	}
+}
+
+_Bool check_expression(struct AST *state,struct AST_Translation_Unit *unit)
+{
+
+}
+_Bool check_transition(struct AST *state,struct AST_Translation_Unit *unit)
+{
+
+}
+void anotate_unchecked_states(struct AST_Translation_Unit *unit,struct Translation_Data *translation_data)
+{
+	size_t i;
+	for(i=0;i<unit->number_of_machines;++i)
+	{
+		anotate_machine(unit->machines[i],unit);
+	}
+	if(has_new_errors(
+
+}
+void anotate_machine(struct AST_Machine *machine,struct AST_Translation_Unit *unit,struct Translation_Data *translation_data)
+{
+	size_t i;
+	for(i=0;i<machine->transitions->size;++i)
+	{
+		machine->transitions->transitions[i]->from=anotate_expression(machine->transitions->transitions[i]->from,machine,unit);
+	}
+	if(has_new_errors(translation_data))
+	{
+		push_error_with_token("in machine",translation_data,machine->id);
+		delete_ast_machine(machine);
+	}
+}
+struct AST* anotate_expression(struct AST *expression,struct AST_Translation_Unit *unit,struct AST_Machine *current_machine,struct Translation_Data *translation_data);
+{
+	struct AST_Machine *hold_machine;
+	struct AST *hold_left;
+	struct AST *hold_right;
+
+	if(expression_is_binary(expression))
+	{
+		left=((struct AST_Binary_Expression*)expression)->left;
+		right=((struct AST_Binary_Expression*)expression)->right;
+
+		if(expression->type==AST_TYPE_OP_SELECTOR)
+		{
+			hold_machine=Map_Check(unit->machines_map,((struct AST_Unchecked_State*)hold_left)->name->data,((struct AST_Unchecked_State*)hold_left)->name->size);
+			if(hold_machine==NULL)
+			{
+				push_error_with_token("machine id is undefined",((struct AST_Unchecked_State*)hold_left)->name,translation_data);
+				delete_ast(expression);
+				return NULL;
+			}else
+			{
+				return ast_check_state(hold_right,hold_machine->states,translation_data);
+			}
+		}else
+		{
+			AS_BIN_EXPR_PTR(expression)->right=anotate_expression(AS_BIN_EXPR_PTR(expression)->right,machine,unit);
+			AS_BIN_EXPR_PTR(expression)->left=anotate_expression(AS_BIN_EXPR_PTR(expression)->left,machine,unit);
+			return expression;
+		}
+	}else if(expression_is_unary(expression))
+	{
+		AS_UN_EXPR_PTR(expression)->operand=anotate_expression(AS_UN_EXPR_PTR(expression)->operand,machine,unit);
+	}else if(expression->type==AST_TYPE_UNFINISHED_STATE)
+	{
+		return ast_check_state(AS_UNCK_EXPR_PTR(expression),machine->states,translation_data);
+	}
+}
 #endif
diff --git a/src/backend/backend.h b/src/backend/backend.h
index 1857cd0..8b865fd 100644
--- a/src/backend/backend.h
+++ b/src/backend/backend.h
@@ -2,6 +2,7 @@
 #define BACKEND_H BACKEND_H
 #include <parser.h>
 #include <ast_to_c.h>
+#include <map.h>
 
 /*
  * describes a given state and the transitions coming out of it
@@ -15,4 +16,16 @@ struct State_And_Transitions
 };
 /*returns an array of state_and_transition structs*/
 struct State_And_Transitions** extract_transition_table(struct AST_States *states,struct AST_Transitions *transitions);
+/*extracts a state from the expression that belongs in the states structure*/
+struct AST_State* extract_state(struct AST *expression,struct AST_States *states);
+
+void anotate_unchecked_states(struct AST_Translation_Unit *unit,struct Translation_Data *translation_data);
+void anotate_machine(struct AST_Machine *machine,struct AST_Translation_Unit *unit,struct Translation_Data *translation_data);
+struct AST* anotate_expression(struct AST *expression,struct AST_Translation_Unit *unit,struct AST_Machine *current_machine,struct Translation_Data *translation_data);
+
+_Bool expression_is_binary(struct AST* expression);
+_Bool expression_is_unary(struct AST* expression);
+_Bool state_is_in_states(struct AST_State *state,struct AST_States *states);
+_Bool check_expression(struct AST *state,struct AST_Translation_Unit *unit);
+_Bool check_transition(struct AST *state,struct AST_Translation_Unit *unit);
 #endif
diff --git a/src/backend/targets/C/ast_to_c.c b/src/backend/targets/C/ast_to_c.c
index 346801c..79d6017 100644
--- a/src/backend/targets/C/ast_to_c.c
+++ b/src/backend/targets/C/ast_to_c.c
@@ -3,10 +3,118 @@
 #include <ast_to_c.h>
 #include <print.h>
 
-void ast_to_c(FILE *out,struct AST *tree)
+void ast_to_c(char *output_name,struct AST *tree)
 {
-	assert(tree->type==AST_TYPE_MACHINE);
-	ast_machine_to_c(out,(struct AST_Machine*)tree);
+	size_t output_name_length;
+	char *hold_name;
+	FILE *hold_out;
+
+	if(output_name!=NULL)
+	{
+		output_name_length=strnlen(output_name,1000);
+
+		hold_name=calloc(output_name_length+100,1);
+		memcpy(hold_name,output_name,output_name_length);
+
+		memcpy(hold_name+output_name_length,".h",sizeof(".h"));
+		hold_out=fopen(hold_name,"w");
+			ast_translation_unit_to_c_print_header_part(hold_out,output_name,(struct AST_Translation_Unit*)tree);
+		fclose(hold_out);
+
+		memcpy(hold_name+output_name_length,".c",sizeof(".c"));
+		hold_out=fopen(hold_name,"w");
+			ast_translation_unit_to_c_print_body_part(hold_out,output_name,(struct AST_Translation_Unit*)tree);
+		fclose(hold_out);
+
+		memcpy(hold_name+output_name_length,"_external.h",sizeof("_external.h"));
+		hold_out=fopen(hold_name,"w");
+			ast_translation_unit_to_c_print_external_commands(hold_out,output_name,(struct AST_Translation_Unit*)tree);
+		fclose(hold_out);
+
+		free(hold_name);
+
+	}else
+	{
+		ast_translation_unit_to_c_print_external_commands(stdout,NULL,(struct AST_Translation_Unit*)tree);
+		ast_translation_unit_to_c_print_header_part(stdout,NULL,(struct AST_Translation_Unit*)tree);
+		ast_translation_unit_to_c_print_body_part(stdout,NULL,(struct AST_Translation_Unit*)tree);
+	}
+
+}
+void ast_translation_unit_to_c_print_base_name(FILE *out, char *base_name)
+{
+	size_t i;
+	for(i=0;i<1000 && base_name[i]!='\0';++i)
+		fprintf(out,"%c",toupper(base_name[i]));
+}
+void ast_translation_unit_to_c_print_header_string(FILE *out,char *base_name,char *file_suffix)
+{
+	fprintf(out,"#ifndef ");
+	ast_translation_unit_to_c_print_base_name(out,base_name);
+	fprintf(out,"%s\n#define ",file_suffix);
+	ast_translation_unit_to_c_print_base_name(out,base_name);
+	fprintf(out,"%s ",file_suffix);
+	ast_translation_unit_to_c_print_base_name(out,base_name);
+	fprintf(out,"%s\n",file_suffix);
+}
+void ast_translation_unit_to_c_print_footer_string(FILE *out,char *base_name,char *file_suffix)
+{
+	fprintf(out,"\n#endif //#ifndef ");
+	ast_translation_unit_to_c_print_base_name(out,base_name);
+	fprintf(out,"%s",file_suffix);
+}
+void ast_translation_unit_to_c_print_header_part(FILE *out,char *base_name,struct AST_Translation_Unit *translation_unit)
+{
+	size_t i;
+	if(base_name)
+	{
+		ast_translation_unit_to_c_print_header_string(out,base_name,"_H");
+		fprintf(out,"#include<stdlib.h>\n\n");
+	}
+
+	ast_to_c_print_internal_stuff_for_header(out,translation_unit);
+
+	for(i=0;i<translation_unit->number_of_machines;++i)
+		ast_machine_to_c_make_header_part(out,translation_unit->machines[i]);
+
+	ast_machines_to_c_array(out,translation_unit);
+
+	if(base_name)
+		ast_translation_unit_to_c_print_footer_string(out,base_name,"_H");
+}
+void ast_translation_unit_to_c_print_body_part(FILE *out,char *base_name,struct AST_Translation_Unit *translation_unit)
+{
+	size_t i;
+
+	if(base_name)
+	{
+		ast_translation_unit_to_c_print_header_string(out,base_name,"_C");
+		fprintf(out,"#include \"%s.h\"\n",base_name);
+		fprintf(out,"#include \"%s_external.h\"\n\n",base_name);
+	}
+
+	for(i=0;i<translation_unit->number_of_machines;++i)
+		ast_machine_to_c_make_body_part(out,translation_unit->machines[i]);
+
+	ast_to_c_print_internal_stuff_for_body(out);
+
+	if(base_name)
+		ast_translation_unit_to_c_print_footer_string(out,base_name,"_C");
+}
+void ast_translation_unit_to_c_print_external_commands(FILE *out,char *base_name,struct AST_Translation_Unit *translation_unit)
+{
+	if(base_name)
+	{
+		ast_translation_unit_to_c_print_header_string(out,base_name,"_EXTERNAL_H");
+		fprintf(out,"#include \"%s.h\"\n\n",base_name);
+	}
+
+	Map_Map_Extended(translation_unit->used_commands_map,(void (*)(void*,void*))ast_command_to_c_extern_declaration,out);
+
+	if(base_name)
+	{
+		ast_translation_unit_to_c_print_footer_string(out,base_name,"_EXTERNAL_H");
+	}
 }
 void ast_machine_to_c(FILE *out,struct AST_Machine *machine)
 {
@@ -17,7 +125,6 @@ void ast_machine_to_c(FILE *out,struct AST_Machine *machine)
 	ast_machine_to_c_make_header_part(out,machine);
 	ast_machine_to_c_make_body_part(out,machine);
 
-
 }
 void ast_machine_to_c_make_body_part(FILE *out,struct AST_Machine *machine)
 {
@@ -36,8 +143,6 @@ void ast_machine_to_c_make_body_part(FILE *out,struct AST_Machine *machine)
 }
 void ast_machine_to_c_make_header_part(FILE *out,struct AST_Machine *machine)
 {
-	fprintf(out,"typedef struct machine_buffer_t \n{"
-		       "\n\tsize_t size;\n\tunsigned char buffer[];\n} machine_buffer_t;\n\n");
 	ast_events_to_c(out,machine);
 	ast_states_to_c(out,machine);
 }
@@ -48,15 +153,13 @@ void ast_events_to_c(FILE *out,struct AST_Machine *machine)
 	assert(out!=NULL && machine!=NULL && machine->type==AST_TYPE_MACHINE);
 
 	fprintf(out,"enum ");
-	ast_event_name_to_c(out,machine);
+	ast_machine_enum_tag(out,machine);
 	fprintf(out,"\n{\n");
 
 	for(i=0;i<machine->events->number_of_events;++i)
 	{
 		fprintf(out,"\t");
-		ast_token_to_c(out,machine->id);
-		fprintf(out,"_EVENT_");
-		ast_token_to_c(out,machine->events->events[i]->name);
+		ast_event_to_c_enum(out,machine,machine->events->events[i]);
 		fprintf(out,",\n");
 	}
 	fprintf(out,"};\n");
@@ -75,19 +178,31 @@ void ast_states_to_c(FILE *out,struct AST_Machine *machine)
 void ast_transitions_of_state_to_c(FILE *out,struct AST_Machine *machine,struct State_And_Transitions *vector)
 {
 	size_t i;
-	ast_state_to_c_signature(out,machine,vector->state);
-	fprintf(out,"\n{\n\n\tswitch(event)\n\t{\n");
-	for(i=0;i<vector->number_of_transitions;++i)
+	//fprintf(out,"\tmachine_buffer_t *hold_buffer;\n\thold_buffer=input;\n\n");
+	
+	if(vector->number_of_transitions>0)
 	{
-		fprintf(out,"\t\tcase ");
-		ast_token_to_c(out,vector->transitions[i]->event->name);
-		fprintf(out,":\n");
-		ast_pipeline_to_c(out,3,vector->transitions[i]->pipeline);
-		fprintf(out,"\n\t\t\tbreak;\n");
+		fprintf(out,"\tswitch(event)\n\t{\n");
+		for(i=0;i<vector->number_of_transitions;++i)
+		{
+			fprintf(out,"\t\tcase ");
+			ast_event_to_c_enum(out,machine,vector->transitions[i]->event);
+
+			fprintf(out,":\n");
+			ast_pipeline_to_c(out,3,vector->transitions[i]->pipeline);
+			fprintf(out,"\t\t\tmachine_states[");
+			ast_token_to_c(out,machine->id);
+			fprintf(out,"]=");
+			ast_state_to_c_function_name(out,machine,vector->transitions[i]->to);
+			fprintf(out,";\n\t\t\tbreak;\n");
+		}
+		fprintf(out,"\t}\n");
 	}
+	fprintf(out,"\tdelete_machine_buffer(input);\n");
 
 }
-void ast_event_name_to_c(FILE *out,struct AST_Machine *machine)
+/*prints the enum tag for the given machine*/
+void ast_machine_enum_tag(FILE *out,struct AST_Machine *machine)
 {
 	fprintf(out,"MACHINE_");
 	ast_token_to_c(out,machine->id);
@@ -95,13 +210,9 @@ void ast_event_name_to_c(FILE *out,struct AST_Machine *machine)
 }
 void ast_state_to_c_signature(FILE *out,struct AST_Machine *machine,struct AST_State *state)
 {
-	fprintf(out,"void machine_");
-	ast_token_to_c(out,machine->id);	
-	fprintf(out,"_state_");
-	ast_token_to_c(out,state->name);
-	fprintf(out,"(enum ");
-	ast_event_name_to_c(out,machine);
-	fprintf(out," event)\n");
+	fprintf(out,"void ");
+	ast_state_to_c_function_name(out,machine,state);
+	fprintf(out,"(int event,machine_buffer_t *input)");
 }
 void ast_token_to_c(FILE *out,struct token *token)
 {
@@ -116,18 +227,16 @@ void ast_pipeline_to_c(FILE *out,size_t indentation,struct AST_Pipeline *pipelin
 {
 	size_t i;
 
-	ast_to_c_print_tabs(out,indentation);
-	fprintf(out,"machine_buffer_t *hold_buffer;\n");
+	if(pipeline==NULL) return;
 
 	for(i=0;i<pipeline->size;++i)
 	{
 		ast_to_c_print_tabs(out,indentation);
-		fprintf(out,"hold_buffer=");
-		ast_command_to_c(out,pipeline->pipeline[i],"hold_buffer");
+		fprintf(out,"input=");
+		ast_command_to_c(out,pipeline->pipeline[i],"input");
 		fprintf(out,";\n");
 	}
-	ast_to_c_print_tabs(out,indentation);
-	fprintf(out,"delete_machine_buffer(hold_buffer);\n");
+	//ast_to_c_print_tabs(out,indentation);
 }
 void ast_command_to_c(FILE *out,struct AST_Command *command,char *hold_buffer)
 {
@@ -140,11 +249,11 @@ void ast_command_to_c(FILE *out,struct AST_Command *command,char *hold_buffer)
 	fprintf(out,",%s)",hold_buffer);
 }
 
-void ast_command_to_c_signature(FILE *out,struct AST_Command *command)
+void ast_command_to_c_extern_declaration(struct AST_Command *command,FILE *out)
 {
-	fprintf(out,"machine_buffer_t* ");
+	fprintf(out,"extern machine_buffer_t* ");
 	ast_token_to_c(out,command->function_name);
-	fprintf(out,"machine_buffer_t *arguments,machine_buffer_t *input)");
+	fprintf(out,"(machine_buffer_t *arguments,machine_buffer_t *input);\n");
 }
 void ast_to_c_print_tabs(FILE *out,size_t number_of_tabs)
 {
@@ -152,4 +261,113 @@ void ast_to_c_print_tabs(FILE *out,size_t number_of_tabs)
 	for(i=0;i<number_of_tabs;++i)
 		fprintf(out,"\t");
 }
+void ast_machines_to_c_array(FILE *out,struct AST_Translation_Unit *translation_unit)
+{
+	size_t i;
+
+	fprintf(out,"void (*machine_states[])(int,machine_buffer_t*)={");
+	for(i=0;i<translation_unit->number_of_machines;++i)
+	{
+		ast_state_to_c_function_name(out,translation_unit->machines[i],translation_unit->machines[i]->starting_state);
+		fprintf(out,",");
+	}	
+	fprintf(out,"};\n");
+}
+void ast_machines_to_c_enum(FILE *out,struct AST_Translation_Unit *translation_unit)
+{
+	size_t i;
+	fprintf(out,"enum MACHINES_ENUM\n{\n");
+	for(i=0;i<translation_unit->number_of_machines;++i)
+	{
+		fprintf(out,"\t");
+		ast_token_to_c(out,translation_unit->machines[i]->id);
+		fprintf(out,",\n");
+	}
+
+	fprintf(out,"\tMACHINES_ENUM_END\n};\n");
+}
+void ast_state_to_c_function_name(FILE *out,struct AST_Machine *machine,struct AST_State *state)
+{
+	fprintf(out,"machine_");
+	ast_token_to_c(out,machine->id);	
+	fprintf(out,"_state_");
+	ast_token_to_c(out,state->name);
+}
+void ast_event_to_c_enum(FILE *out,struct AST_Machine *machine,struct AST_Event *event)
+{
+	ast_token_to_c(out,machine->id);
+	fprintf(out,"_EVENT_");
+	ast_token_to_c(out,event->name);
+}
+void ast_to_c_print_internal_stuff_for_header(FILE *out,struct AST_Translation_Unit *translation_unit)
+{
+	fprintf(out,"\n\n");
+	ast_machines_to_c_enum(out,translation_unit);
+	fprintf(out,"\n\n");
+
+
+	ast_to_c_print_comment(out,"\tthis is the structure that facilitates data exchange");
+	fprintf(out,"typedef struct machine_buffer_t \n{"
+		       "\n\tsize_t size;\n\tunsigned char buffer[];\n} machine_buffer_t;\n\n");
+
+
+	ast_to_c_print_comment(out,	"\tuse this function to pass an event to a machine\n"
+					"\tthe input buffer is passed to the first executed function if any\n"
+					"\tany remaining buffer after the pipeline has finished is passed\n"
+					"\tto the delete_machine_buffer function\n"
+					"\tinput can be NULL"
+
+			);
+	fprintf(out,"void push_event_to_machine(enum MACHINES_ENUM machine,int event,machine_buffer_t *input);\n\n");
+
+
+
+
+	ast_to_c_print_comment(out,	"\tthis function creates a buffer structure in the heap\n"
+					"\tit COPIES the contents of content \n"	
+					"\tsize is in bytes"
+			);
+
+	fprintf(out,"machine_buffer_t* get_machine_buffer(void *content,size_t size);\n\n");
+	ast_to_c_print_comment(out,"\tfrees the buffer from the heap");
+	fprintf(out,"void delete_machine_buffer(machine_buffer_t *buffer);\n\n");
+}
+void ast_to_c_print_internal_stuff_for_body(FILE *out)
+{
+	
+	fprintf(out,	"void push_event_to_machine(enum MACHINES_ENUM machine,int event,machine_buffer_t *input)\n"
+			"{\n"	
+			"\tif(machine<MACHINES_ENUM_END)"	
+			"\n\t{"	
+			"\n\t\tmachine_states[machine](event,input);"	
+			"\n\t}"	
+			"\n}\n"	
+		);
+
+	fprintf(out,	"machine_buffer_t* get_machine_buffer(void *content,size_t size)\n"
+			"{\n"
+			"\tmachine_buffer_t *ret;\n"
+			"\tsize_t i;\n"
+			"\t\n"
+			"\tret=malloc(sizeof(machine_buffer_t)+size);\n"
+			"\tret->size=size;\n"
+			"\tfor(i=0;i<size;++i)\n"
+			"\t\tret->buffer[i]=((unsigned char*)content)[i];\n"
+			"\treturn ret;\n"
+			"}\n");
+
+	fprintf(out,	"\nvoid delete_machine_buffer(machine_buffer_t *buffer)\n"
+			"{\n"
+			"\tif(buffer)\n"
+			"\t{\n"
+			"\t\tfree(buffer);\n"
+			"\t}\n}"
+			);
+}
+void ast_to_c_print_comment(FILE *out,char *comment)
+{
+	fprintf(out,"/*\n");
+	fprintf(out,"%s\n",comment);
+	fprintf(out,"*/\n");
+}
 #endif
diff --git a/src/backend/targets/C/ast_to_c.h b/src/backend/targets/C/ast_to_c.h
index 8c86687..6e4006f 100644
--- a/src/backend/targets/C/ast_to_c.h
+++ b/src/backend/targets/C/ast_to_c.h
@@ -4,25 +4,53 @@
 #include <parser.h>
 #include <backend.h>
 #include <ctype.h>
+#include <stdio.h>
+#include <string.h>
 
 struct State_And_Transitions;
 
-void ast_to_c(FILE *out,struct AST *tree);
+void ast_to_c(char *output_name,struct AST *tree);
+
+void ast_translation_unit_to_c_print_header_part(FILE *out,char *base_name,struct AST_Translation_Unit *translation_unit);
+void ast_translation_unit_to_c_print_body_part(FILE *out,char *base_name,struct AST_Translation_Unit *translation_unit);
+void ast_translation_unit_to_c_print_external_commands(FILE *out,char *base_name,struct AST_Translation_Unit *translation_unit);
+
+void ast_translation_unit_to_c_print_base_name(FILE *out, char *base_name);
+void ast_translation_unit_to_c_print_header_string(FILE *out,char *base_name,char *file_suffix);
+void ast_translation_unit_to_c_print_footer_string(FILE *out,char *base_name,char *file_suffix);
+
+void ast_translation_unit_to_c(FILE *out,struct AST_Translation_Unit *translation_unit);
 void ast_machine_to_c(FILE *out,struct AST_Machine *machine);
 void ast_machine_to_c_make_header_part(FILE *out,struct AST_Machine *machine);
 void ast_machine_to_c_make_body_part(FILE *out,struct AST_Machine *machine);
 
+
 void ast_events_to_c(FILE *out,struct AST_Machine *machine);
 void ast_states_to_c(FILE *out,struct AST_Machine *machine);
 
-void ast_pipeline_to_c(FILE *out,size_t indentation,struct AST_Pipeline *pipeline);
 void ast_command_to_c(FILE *out,struct AST_Command *command,char *hold_buffer);
-void ast_command_to_c_signature(FILE *out,struct AST_Command *command);
+
+/*note the ordering*/
+void ast_command_to_c_extern_declaration(struct AST_Command *command,FILE *out);
+
+void ast_pipeline_to_c(FILE *out,size_t indentation,struct AST_Pipeline *pipeline);
 
 void ast_transitions_of_state_to_c(FILE *out,struct AST_Machine *machine,struct State_And_Transitions *vector);
 void ast_token_to_c(FILE *out,struct token *token);
-void ast_event_name_to_c(FILE *out,struct AST_Machine *machine);
+void ast_machine_enum_tag(FILE *out,struct AST_Machine *machine);
 void ast_state_to_c_signature(FILE *out,struct AST_Machine *machine,struct AST_State *state);
+void ast_state_to_c_function_name(FILE *out,struct AST_Machine *machine,struct AST_State *state);
+void ast_machines_to_c_array(FILE *out,struct AST_Translation_Unit *translation_unit);
+void ast_machines_to_c_enum(FILE *out,struct AST_Translation_Unit *translation_unit);
+void ast_event_to_c_enum(FILE *out,struct AST_Machine *machine,struct AST_Event *event);
+
+
+void ast_to_c_print_internal_stuff_for_header(FILE *out,struct AST_Translation_Unit *translation_unit);
+void ast_to_c_print_internal_stuff_for_body(FILE *out);
+void ast_to_c_print_comment(FILE *out,char *comment);
+
+
+
 /* :X */
 void ast_to_c_print_tabs(FILE *out,size_t number_of_tabs);
 
diff --git a/src/frontend/lexer.c b/src/frontend/lexer.c
index 6dc348d..de8ff95 100644
--- a/src/frontend/lexer.c
+++ b/src/frontend/lexer.c
@@ -37,14 +37,26 @@ struct token* lex_step(struct Source *src,struct Translation_Data *translation_d
 		return get_token(src->src+src->where_in_src-sizeof("on")+1,sizeof("on")-1,KW_ON,src->current_row,src->current_column);
 	if(check_and_move_if_on_word("[",sizeof("[")-1,src,0))
 		return get_token(src->src+src->where_in_src-sizeof("[")+1,sizeof("[")-1,KW_OPEN_SQUARE,src->current_row,src->current_column);
+	if(check_and_move_if_on_word("(",sizeof("(")-1,src,0))
+		return get_token(src->src+src->where_in_src-sizeof("(")+1,sizeof("(")-1,KW_OPEN_NORMAL,src->current_row,src->current_column);
+	if(check_and_move_if_on_word(")",sizeof(")")-1,src,0))
+		return get_token(src->src+src->where_in_src-sizeof(")")+1,sizeof(")")-1,KW_CLOSE_NORMAL,src->current_row,src->current_column);
 	if(check_and_move_if_on_word(",",sizeof(",")-1,src,0))
 		return get_token(src->src+src->where_in_src-sizeof(",")+1,sizeof(",")-1,KW_COMMA,src->current_row,src->current_column);
+	if(check_and_move_if_on_word(".",sizeof(".")-1,src,0))
+		return get_token(src->src+src->where_in_src-sizeof(".")+1,sizeof(".")-1,KW_DOT,src->current_row,src->current_column);
 	if(check_and_move_if_on_word("]",sizeof("]")-1,src,0))
 		return get_token(src->src+src->where_in_src-sizeof("]")+1,sizeof("]")-1,KW_CLOSE_SQUARE,src->current_row,src->current_column);
 	if(check_and_move_if_on_word(";",sizeof(";")-1,src,0))
 		return get_token(src->src+src->where_in_src-sizeof(";")+1,sizeof(";")-1,KW_SEMI_COLUMN,src->current_row,src->current_column);
 	if(check_and_move_if_on_word("|",sizeof("|")-1,src,0))
 		return get_token(src->src+src->where_in_src-sizeof("|")+1,sizeof("|")-1,KW_PIPE,src->current_row,src->current_column);
+	if(check_and_move_if_on_word("||",sizeof("||")-1,src,0))
+		return get_token(src->src+src->where_in_src-sizeof("||")+1,sizeof("||")-1,KW_OR,src->current_row,src->current_column);
+	if(check_and_move_if_on_word("&&",sizeof("&&")-1,src,0))
+		return get_token(src->src+src->where_in_src-sizeof("&&")+1,sizeof("&&")-1,KW_AND,src->current_row,src->current_column);
+	if(check_and_move_if_on_word("!",sizeof("!")-1,src,0))
+		return get_token(src->src+src->where_in_src-sizeof("!")+1,sizeof("!")-1,KW_NOT,src->current_row,src->current_column);
 	if(check_and_move_if_on_word("starting",sizeof("starting")-1,src,1))
 		return get_token(src->src+src->where_in_src-sizeof("starting")+1,sizeof("starting")-1,KW_STARTING,src->current_row,src->current_column);
 	if(check_and_move_if_on_word("states",sizeof("states")-1,src,1))
@@ -157,4 +169,10 @@ void push_token_into_map(struct token *token,struct Map *map,void *thing)
 {
 	Map_Push(map,token->data,token->size,thing);
 }
+void id_token_to_upper_case(struct token *token)
+{
+	size_t i;
+	for(i=0;i<token->size;++i)
+		token->data[i]=toupper(token->data[i]);
+}
 #endif
diff --git a/src/frontend/lexer.h b/src/frontend/lexer.h
index d102540..266beea 100644
--- a/src/frontend/lexer.h
+++ b/src/frontend/lexer.h
@@ -20,6 +20,8 @@ enum Keyword
 	KW_EOF,
 	KW_OPEN_SQUARE,
 	KW_CLOSE_SQUARE,
+	KW_OPEN_NORMAL,
+	KW_CLOSE_NORMAL,
 	KW_PIPE,
 	KW_SEMI_COLUMN,
 	KW_STARTING,
@@ -29,6 +31,10 @@ enum Keyword
 	KW_EXECUTE,
 	KW_TRANSITIONS,
 	KW_COMMA,
+	KW_DOT,
+	KW_AND,
+	KW_OR,
+	KW_NOT,
 };
 struct token
 {
@@ -45,6 +51,7 @@ struct token* get_token(char *data,size_t size,enum Keyword type,size_t row,size
 void skip_white_space(struct Source *src);
 
 void push_token_into_map(struct token *token,struct Map *map,void *thing);
+void id_token_to_upper_case(struct token *token);
 
 
 void delete_token(struct token *token);
diff --git a/src/frontend/parser.c b/src/frontend/parser.c
index 45752e7..a260622 100644
--- a/src/frontend/parser.c
+++ b/src/frontend/parser.c
@@ -13,17 +13,25 @@ struct AST_Translation_Unit* parse_translation_unit(struct Translation_Data *tra
 {
 	struct Queue *machines;
 	struct Map *hold_command_map;
+	struct Map *hold_machines_map;
 	struct AST_Machine *hold_machine;
 
 	machines=calloc(1,sizeof(struct Queue));
+
 	hold_command_map=malloc(sizeof(struct Map));
 	Map_Init(hold_command_map);
 
+	hold_machines_map=malloc(sizeof(struct Map));
+	Map_Init(hold_machines_map);
+
 	translation_data->hold_command_map=hold_command_map;
+	translation_data->hold_machines_map=hold_machines_map;
 
 	while(!get_and_check(translation_data,KW_EOF))
 	{
 		hold_machine=parse_machine(translation_data);
+		/*TODO check for repeated machine ids*/
+		Map_Push(hold_machines_map,hold_machine->id->data,hold_machine->id->size,hold_machine);
 		if(hold_machine)
 		{
 			Queue_Push(machines,hold_machine);
@@ -37,7 +45,7 @@ struct AST_Translation_Unit* parse_translation_unit(struct Translation_Data *tra
 			return NULL;
 		}
 	}
-	return get_ast_translation_unit(machines,hold_command_map);
+	return get_ast_translation_unit(machines,hold_command_map,hold_machines_map);
 }
 /*
  * machine: 'machine' id '[' machine-inner ']' ';'
@@ -308,6 +316,10 @@ struct AST_Transitions* parse_transitions_inner(struct Translation_Data *transla
 	{
 		push_parsing_error("there are no transitions",translation_data);
 		return NULL;
+	}else if(has_new_errors(translation_data))
+	{
+		push_parsing_error("in transition",translation_data);
+		return NULL;
 	}else
 	{
 		return get_ast_transitions(transitions);
@@ -328,44 +340,39 @@ struct AST_Transition* parse_transition(struct Translation_Data *translation_dat
 
 	if(get_and_check(translation_data,KW_FROM))
 	{
-		if(get_kw(translation_data)==KW_ID)
+		hold_from=parse_expression(translation_data);
+		if(hold_from!=NULL)
 		{
-			hold_token=Queue_Pop(translation_data->tokens);
-			hold_from=Map_Check(states->states_map,hold_token->data,hold_token->size);
-			delete_token(hold_token);
-			if(hold_from!=NULL)
+			if(get_and_check(translation_data,KW_TO))
 			{
-				if(get_and_check(translation_data,KW_TO))
+				if(get_kw(translation_data)==KW_ID)
 				{
-					if(get_kw(translation_data)==KW_ID)
+					hold_token=Queue_Pop(translation_data->tokens);
+					hold_to=Map_Check(states->states_map,hold_token->data,hold_token->size);
+					delete_token(hold_token);
+					if(hold_to!=NULL)
 					{
-						hold_token=Queue_Pop(translation_data->tokens);
-						hold_to=Map_Check(states->states_map,hold_token->data,hold_token->size);
-						delete_token(hold_token);
-						if(hold_to!=NULL)
+						if(get_and_check(translation_data,KW_ON) && get_and_check(translation_data,KW_EVENT) )
 						{
-							if(get_and_check(translation_data,KW_ON) && get_and_check(translation_data,KW_EVENT) )
+							if(get_kw(translation_data)==KW_ID)
 							{
-								if(get_kw(translation_data)==KW_ID)
+								hold_token=Queue_Pop(translation_data->tokens);
+								hold_event=Map_Check(events->events_map,hold_token->data,hold_token->size);
+								delete_token(hold_token);
+								if(hold_event!=NULL)
 								{
-									hold_token=Queue_Pop(translation_data->tokens);
-									hold_event=Map_Check(events->events_map,hold_token->data,hold_token->size);
-									delete_token(hold_token);
-									if(hold_event!=NULL)
-									{
-										if(get_and_check(translation_data,KW_EXECUTE))
-											if((hold_pipeline=parse_pipeline(translation_data))==NULL)
-												{ push_parsing_error("after execute",translation_data); return NULL; }
-										/*GOAL*/
-										return get_ast_transition(hold_from,hold_to,hold_event,hold_pipeline);
-									}else { push_parsing_error("event not defined",translation_data); return NULL; }
-								}else { push_parsing_error("no event name given in transition",translation_data); return NULL; }
-							}else { push_parsing_error("expected 'on event'",translation_data); return NULL; }	
-						}else { push_parsing_error("using undefined to state in transition",translation_data); }
-					}else { push_parsing_error("expected id in transition expression",translation_data); return NULL; }
-				}else { push_parsing_error("expected 'to'",translation_data); return NULL; }	
-			}else { push_parsing_error("using undefined from state in transition",translation_data); return NULL; }
-		}else { push_parsing_error("expected id in transition expression",translation_data); return NULL; }
+									if(get_and_check(translation_data,KW_EXECUTE))
+										if((hold_pipeline=parse_pipeline(translation_data))==NULL)
+											{ push_parsing_error("after execute",translation_data); return NULL; }
+									/*GOAL*/
+									return get_ast_transition(hold_from,hold_to,hold_event,hold_pipeline);
+								}else { push_parsing_error("event not defined",translation_data); return NULL; }
+							}else { push_parsing_error("no event name given in transition",translation_data); return NULL; }
+						}else { push_parsing_error("expected 'on event'",translation_data); return NULL; }	
+					}else { push_parsing_error("using undefined to state in transition",translation_data); }
+				}else { push_parsing_error("expected id in transition expression",translation_data); return NULL; }
+			}else { push_parsing_error("expected 'to'",translation_data); return NULL; }	
+		}else { push_parsing_error("using undefined from state in transition",translation_data); return NULL; }
 	}else { return NULL; }
 }
 /*
@@ -402,7 +409,8 @@ struct AST_Command* parse_command(struct  Translation_Data *translation_data)
 		if(get_kw(translation_data)==KW_STRING)
 			string=Queue_Pop(translation_data->tokens);
 		ret=get_ast_command(id,string);
-		Map_Push(translation_data->hold_command_map,ret->argument->data,ret->argument->size,ret);
+		if(!Map_Check(translation_data->hold_command_map,ret->function_name->data,ret->function_name->size))
+			Map_Push(translation_data->hold_command_map,ret->function_name->data,ret->function_name->size,ret);
 
 		return ret;
 	}else
@@ -441,6 +449,7 @@ struct AST_State* get_ast_state(struct token *id)
 
 	ret=malloc(sizeof(struct AST_State));
 	ret->name=id;
+	
 	/*number is assigned in get_ast_states*/
 
 	return ret;
@@ -473,7 +482,9 @@ struct AST_States* get_ast_states(struct Queue *states)
 	while(states->size>0)
 	{
 		hold_state=Queue_Pop(states);
+		/*TODO check for redeclaration*/
 		Map_Push(ret->states_map,hold_state->name->data,hold_state->name->size,hold_state);
+
 		ret->states[states->size]=hold_state;
 		hold_state->number=states->size;
 	}
@@ -501,6 +512,7 @@ struct AST_Events* get_ast_events(struct Queue *events)
 	while(events->size>0)
 	{
 		hold_event=Queue_Pop(events);
+		/*TODO check for redeclaration*/
 		Map_Push(ret->events_map,hold_event->name->data,hold_event->name->size,hold_event);
 		ret->events[events->size]=hold_event;
 	}
@@ -510,7 +522,7 @@ struct AST_Events* get_ast_events(struct Queue *events)
 
 	return ret;
 }
-struct AST_Transition* get_ast_transition(struct AST_State *from,struct AST_State *to,struct AST_Event *event,struct AST_Pipeline *pipeline)
+struct AST_Transition* get_ast_transition(struct AST *from,struct AST_State *to,struct AST_Event *event,struct AST_Pipeline *pipeline);
 {
 	struct AST_Transition *ret;
 	ret=malloc(sizeof(struct AST_Transition));
@@ -556,6 +568,7 @@ struct AST_Machine* get_ast_machine(struct token *id,struct AST_States *states,s
 	ret->states=states;
 	ret->events=events;
 	ret->transitions=transitions;
+	ret->starting_state=starting_state;
 
 	return ret;
 }
@@ -713,7 +726,7 @@ void delete_ast_translation_unit(struct AST_Translation_Unit *ast)
 	free(ast->used_commands_map);
 	free(ast);
 }
-struct AST_Translation_Unit* get_ast_translation_unit(struct Queue *machines,struct Map *command_map)
+struct AST_Translation_Unit* get_ast_translation_unit(struct Queue *machines,struct Map *command_map,struct Map *machines_map)
 {
 	struct AST_Translation_Unit *ret;
 	struct AST_Machine *hold_machine;
@@ -721,6 +734,7 @@ struct AST_Translation_Unit* get_ast_translation_unit(struct Queue *machines,str
 	ret=malloc(sizeof(struct AST_Translation_Unit)+sizeof(struct AST_Machine *[machines->size]));
 	ret->type=AST_TYPE_TRANSLATION_UNIT;
 	ret->used_commands_map=command_map;
+	ret->machines_map=machines_map;
 	ret->number_of_machines=machines->size;
 
 	while(machines->size>0)
@@ -731,4 +745,201 @@ struct AST_Translation_Unit* get_ast_translation_unit(struct Queue *machines,str
 
 	return ret;
 }
+/*
+ * expression: or-expression
+ */
+struct AST* parse_expression(struct Translation_Data *translation_data)
+{
+	return parse_or_expression(translation_data);
+}
+/*
+ * or-expression: and-expression [ || and-expression ]
+ */
+struct AST* parse_or_expression(struct Translation_Data *translation_data)
+{
+	struct AST *hold_left_expression;
+	struct AST *hold_right_expression;
+
+	hold_left_expression=parse_and_expression(translation_data);
+	if(hold_left_expression==NULL)
+		return NULL;
+
+	if(get_and_check(translation_data,KW_OR))
+	{
+		hold_right_expression=parse_and_expression(translation_data);
+		if(hold_right_expression==NULL)
+		{
+			push_parsing_error("expected expression in right side of ||",translation_data);
+			delete_ast(hold_left_expression);
+			return NULL;
+		}
+		return (struct AST*)get_ast_binary_expression(left,right,AST_TYPE_OP_OR);
+	}else
+	{
+		return hold_left_expression;
+	}
+
+}
+/*
+ * and-expression: not-expression [ && not-expression ]
+ */
+struct AST* parse_and_expression(struct Translation_Data *translation_data)
+{
+	struct AST *hold_left_expression;
+	struct AST *hold_right_expression;
+
+	hold_left_expression=parse_not_expression(translation_data);
+	if(hold_left_expression==NULL)
+		return NULL;
+
+	if(get_and_check(translation_data,KW_AND))
+	{
+		hold_right_expression=parse_not_expression(translation_data);
+		if(hold_right_expression==NULL)
+		{
+			push_parsing_error("expected expression in right side of &&",translation_data);
+			delete_ast(hold_left_expression);
+			return NULL;
+		}
+		return (struct AST*)get_ast_binary_expression(left,right,AST_TYPE_OP_AND);
+	}else
+	{
+		return hold_left_expression;
+	}
+}
+/*
+ * not-expression: [!]primary-expression
+ */
+struct AST* parse_not_expression(struct Translation_Data *translation_data)
+{
+	struct AST *hold_expression;
+	if(get_and_check(translation_data,KW_NOT))
+	{
+		hold_expression=parse_primary_expression(translation_data);
+		if(hold_expression!=NULL)
+		{
+			return get_ast_unary_expression(hold_expression,AST_TYPE_OP_NOT);
+		}else
+		{
+			push_parsing_error("in '!' expression",translation_data);
+			return NULL;
+		}
+	}
+		return parse_primary_expression(translation_data);
+}
+/*
+ * primary-expression: (expression) | id | id.id
+ */
+struct AST* parse_primary_expression(struct Translation_Data *translation_data)
+{
+	struct AST *hold_expression;
+	struct AST_Unchecked_State *hold_id1;
+	struct AST_Unchecked_State *hold_id2; 
+
+	if(get_and_check(translation_data,KW_OPEN_NORMAL))
+	{
+		hold_expression=parse_expression(translation_data);
+		if(get_and_check(translation_data,KW_CLOSE_NORMAL))
+		{
+			return hold_expression;
+		}else
+		{
+			push_parsing_error("expected ')' in expression",translation_data);
+			delete_ast(hold_expression);
+			return NULL;
+		}
+
+	}else if(get_kw(translation_data)==KW_ID)
+	{
+		hold_id1=get_ast_unchecked_state(Queue_Pop(translation_data->tokens));
+		if(get_and_check(translation_data,KW_DOT))
+		{
+			if(get_kw(translation_data)==KW_ID)
+			{
+				hold_id2=get_ast_unchecked_state(Queue_Pop(translation_data->tokens));
+				return get_ast_binary_expression(hold_id1,hold_id2,AST_TYPE_OP_SELECTOR);
+			}else
+			{
+				push_parsing_error("expected a state id in selector",translation_data);
+				delete_ast(hold_id1);
+				return NULL;
+			}	
+		}else
+		{
+			return hold_id1;
+		}
+	}else
+	{
+		push_parsing_error("expected an expression",translation_data);
+		return NULL;
+	}
+}
+struct AST_Binary_Expression* get_ast_binary_expression(struct AST *left,struct AST *right,enum AST_Type type)
+{
+	struct AST_Binary_Expression *ret;
+
+	ret=malloc(sizeof(struct AST_Binary_Expression));
+	ret->type=type;
+	ret->left=left;
+	ret->right=right;
+
+	return ret;
+}
+struct AST_Unary_Expression* get_ast_unary_expression(struct AST *operand,enum AST_Type type)
+{
+
+	struct AST_Unary_Expression *ret;
+
+	ret=malloc(sizeof(struct AST_Unary_Expression));	
+
+	ret->type=type;
+	ret->operand=operand;
+
+	return ret;
+}
+struct AST_Unchecked_State* get_ast_unchecked_state(struct token *name)
+{
+	struct AST_Unchecked_State *ret;
+
+	ret=malloc(sizeof(struct AST_Unchecked_State));
+	ret->type=AST_TYPE_UNFINISHED_STATE;
+	ret->name=name;
+
+	return ret;
+}
+
+struct AST_State* ast_check_state(struct AST_Unchecked_State *state,struct AST_States *states,struct Translation_Data *translation_data)
+{
+	struct AST_State *ret;
+	ret=Map_Check(states->states_map,state->name->data,state->name->size);
+	delete_ast_unchecked_state(state);
+	if(ret==NULL)
+	{
+		push_parsing_error("undefined state",translation_data);
+		return NULL;
+	}else
+	{
+		return ret;	
+	}
+}
+
+void delete_ast_binary_expression(struct AST_Binary_Expression *ast)
+{
+	if(ast->right)
+		delete_ast(ast->right);
+	if(ast->left)
+		delete_ast(ast->left);
+	free(ast);
+}
+void delete_ast_unary_expression(struct AST_Unary_Expression *ast)
+{
+	if(ast->operand)
+		delete_ast(ast->operand);
+	free(ast);
+}
+void delete_ast_unchecked_state(struct AST_Unchecked_State *ast)
+{
+	delete_token(ast->name);
+	free(ast);
+}
 #endif
diff --git a/src/frontend/parser.h b/src/frontend/parser.h
index eaede84..74f2ed8 100644
--- a/src/frontend/parser.h
+++ b/src/frontend/parser.h
@@ -5,6 +5,9 @@
 #include <assert.h>
 #include <map.h>
 
+#define AS_BIN_EXPR_PTR(x) ((struct AST_Binary_Expression*)x)
+#define AS_UN_EXPR_PTR(x) ((struct AST_Unary_Expression*)x)
+#define AS_UNCK_EXPR_PTR(x) ((struct AST_Unchecked_State*)x)
 enum AST_Type
 {
 	AST_TYPE_TRANSLATION_UNIT,
@@ -17,6 +20,11 @@ enum AST_Type
 	AST_TYPE_TRANSITIONS,
 	AST_TYPE_COMMAND,
 	AST_TYPE_PIPELINE,
+	AST_TYPE_OP_AND,
+	AST_TYPE_OP_OR,
+	AST_TYPE_OP_NOT,
+	AST_TYPE_OP_SELECTOR,
+	AST_TYPE_UNFINISHED_STATE,
 };
 struct AST
 {
@@ -48,7 +56,7 @@ struct AST_Events
 struct AST_Transition
 {
 	enum AST_Type type;
-	struct AST_State *from;
+	struct AST *from;
 	struct AST_State *to;
 	struct AST_Event *event;
 	struct AST_Pipeline *pipeline;
@@ -75,6 +83,7 @@ struct AST_Machine
 {
 	enum AST_Type type;
 	struct token *id;
+	struct AST_State *starting_state;
 	struct AST_States *states;
 	struct AST_Events *events;
 	struct AST_Transitions *transitions;
@@ -83,9 +92,26 @@ struct AST_Translation_Unit
 {
 	enum AST_Type type;
 	struct Map *used_commands_map;
+	struct Map *machines_map;
 	size_t number_of_machines;
 	struct AST_Machine *machines[];
 };
+struct AST_Binary_Expression
+{
+	enum AST_Type type;
+	struct AST *left;
+	struct AST *right;
+};
+struct AST_Unary_Expression
+{
+	enum AST_Type type;
+	struct AST *operand;
+};
+struct AST_Unchecked_State
+{
+	enum AST_Type type;
+	struct token *name;
+};
 
 
 struct AST* parse_source(struct Translation_Data *translation_data);
@@ -102,18 +128,28 @@ struct AST_Pipeline* parse_pipeline(struct Translation_Data *translation_data);
 struct AST_Command* parse_command(struct Translation_Data *translation_data);
 struct AST_State* parse_start_on(struct Translation_Data *translation_data,struct AST_States *states);
 
+struct AST* parse_expression(struct Translation_Data *translation_data);
+struct AST* parse_or_expression(struct Translation_Data *translation_data);
+struct AST* parse_and_expression(struct Translation_Data *translation_data);
+struct AST* parse_not_expression(struct Translation_Data *translation_data);
+struct AST* parse_primary_expression(struct Translation_Data *translation_data);
 
 struct AST_State* get_ast_state(struct token *id);
 struct AST_Event* get_ast_event(struct token *id);
 struct AST_States* get_ast_states(struct Queue *states);
 struct AST_Events* get_ast_events(struct Queue *events);
-struct AST_Transition* get_ast_transition(struct AST_State *from,struct AST_State *to,struct AST_Event *event,struct AST_Pipeline *pipeline);
+struct AST_Transition* get_ast_transition(struct AST *from,struct AST_State *to,struct AST_Event *event,struct AST_Pipeline *pipeline);
 struct AST_Command* get_ast_command(struct token *function_name,struct token *argument);
 struct AST_Pipeline* get_ast_pipeline(struct Queue *pipeline);
 struct AST_Machine* get_ast_machine(struct token *id,struct AST_States *states,struct AST_Events *events,struct AST_Transitions *transitions,struct AST_State *starting_state);
 struct AST_Transitions* get_ast_transitions(struct Queue *transitions);
-struct AST_Translation_Unit* get_ast_translation_unit(struct Queue *machines,struct Map *command_map);
+struct AST_Translation_Unit* get_ast_translation_unit(struct Queue *machines,struct Map *command_map,struct Map *machines_map);
+
+struct AST_Binary_Expression* get_ast_binary_expression(struct AST *left,struct AST *right,enum AST_Type type);
+struct AST_Unary_Expression* get_ast_unary_expression(struct AST *operand,enum AST_Type type);
+struct AST_Unchecked_State* get_ast_unchecked_state(struct token *name);
 
+struct AST_State* ast_check_state(struct AST_Unchecked_State *state,struct AST_States *states,struct Translation_Data *translation_data);
 
 void delete_ast(struct AST* ast);
 void delete_ast_event(struct AST_Event* ast);
@@ -127,6 +163,10 @@ void delete_ast_machine(struct AST_Machine* ast);
 void delete_ast_transitions(struct AST_Transitions* ast);
 void delete_ast_translation_unit(struct AST_Translation_Unit *ast);
 
+void delete_ast_binary_expression(struct AST_Binary_Expression *ast);
+void delete_ast_unary_expression(struct AST_Unary_Expression *ast);
+void delete_ast_unchecked_state(struct AST_Unchecked_State *ast);
+
 
 void pointer_array_fill(void **array,struct Queue *q);
 struct Queue* parse_list(struct AST *(*parser)(struct Translation_Data*),struct Translation_Data *translation_data,enum Keyword delim);
diff --git a/src/main.c b/src/main.c
index 1001c51..fe3a9f4 100644
--- a/src/main.c
+++ b/src/main.c
@@ -52,7 +52,7 @@ int main(int argc,char **argv)
 				print_ast(translation_unit);
 			}else if(options->target==OPTION_TARGET_C)
 			{
-				ast_to_c(stdout,translation_unit);
+				ast_to_c(options->output_name,translation_unit);
 			}
 			delete_ast(translation_unit);
 		}
diff --git a/src/program/program.c b/src/program/program.c
index 1e7882d..2632c57 100644
--- a/src/program/program.c
+++ b/src/program/program.c
@@ -40,6 +40,7 @@ struct Options* parse_command_line(int argc,char **argv)
 	ret=malloc(sizeof(struct Options));
 	ret->target=OPTION_DEFAULT;
 	ret->src_name=NULL;
+	ret->output_name=NULL;
 	ret->is_quiet=0;
 
 	for(i=0;i<argc;++i)
@@ -55,7 +56,7 @@ struct Options* parse_command_line(int argc,char **argv)
 			if(++i<argc)
 			{
 				if(strnlen(argv[i],101)<100)
-					ret->src_name=argv[i];
+					ret->output_name=argv[i];
 				else if(!ret->is_quiet)
 				{
 					fprintf(stderr,"Error: Output filename is too long");
@@ -182,4 +183,8 @@ void touch_errors(struct Translation_Data *translation_data)
 	assert(translation_data->hold_number_of_errors>0);
 	--translation_data->hold_number_of_errors;
 }
+void push_error_with_token(char *error_message,struct Translation_Data *translation_data,struct token *token)
+{
+	Queue_Push(translation_data->errors,get_error(error_message,token->row,token->column));
+}
 #endif
diff --git a/src/program/program.h b/src/program/program.h
index 99a02c3..1fa0db6 100644
--- a/src/program/program.h
+++ b/src/program/program.h
@@ -34,6 +34,7 @@ struct Options
 	enum Options_Target_Type target;
 	int is_quiet:1;
 	char *src_name;
+	char *output_name;
 };
 	
 struct Error
@@ -63,6 +64,7 @@ struct Error* get_error(char *message,size_t row,size_t column);
 
 void push_lexing_error(char *error_message,struct Source *src,struct Translation_Data *translation_data);
 void push_parsing_error(char *error_message,struct Translation_Data *translation_data);
+void push_error_with_token(char *error_message,struct Translation_Data *translation_data,struct token *token);
 char has_new_errors(struct Translation_Data *translation_data);
 void touch_errors(struct Translation_Data *translation_data);
 char get_and_check(struct Translation_Data *translation_data,enum Keyword kw);