#include "ex-compiler.h"

static void gather_symbols_uses_clause (ExUsesClause *clause);
static void gather_symbols_definition  (ExDefinition *definition);
static void gather_symbols_namespace   (ExNamespace  *namespace);
static void gather_symbols_extension   (ExExtension  *extension);
static void gather_symbols_request     (ExRequest    *request);
static void gather_symbols_event       (ExEvent      *event);
static void gather_symbols_type_def    (ExTypeDef    *type_def);
static void gather_symbols_identifier  (ExIdentifier *identifier);
static void gather_symbols_type        (ExType       *type);
static void gather_symbols_field       (ExField      *field);
static void gather_symbols_error       (ExError      *error);

void
ex_gather_symbols (ExSpec *spec)
{
    if (!spec)
	return;
    
    gather_symbols_uses_clause (spec->uses_clauses);
    gather_symbols_definition (spec->definitions);
}

static void
gather_symbols_uses_clause (ExUsesClause *clause)
{
    if (!clause)
	return;
    
    gather_symbols_uses_clause (clause->next);
}

static void
gather_symbols_definition (ExDefinition *definition)
{
    if (!definition)
	return;
    
    switch (definition->type)
    {
    case EX_DEFINITION_NAMESPACE:
	gather_symbols_namespace (definition->u.namespace);
	break;

    case EX_DEFINITION_EXTENSION:
	gather_symbols_extension (definition->u.extension);
	break;
	
    case EX_DEFINITION_REQUEST:
	gather_symbols_request (definition->u.request);
	break;
	
    case EX_DEFINITION_TYPE_DEF:
	gather_symbols_type_def (definition->u.type_def);
	break;
	
    case EX_DEFINITION_ERROR:
	gather_symbols_error (definition->u.error);
	break;
	
    case EX_DEFINITION_EVENT:
	gather_symbols_event (definition->u.event);
	break;
    }
    
    gather_symbols_definition (definition->next);
}

static void
gather_symbols_namespace (ExNamespace *namespace)
{
    if (!namespace)
	return;
    
    gather_symbols_definition (namespace->definitions);
}

static void
gather_symbols_extension (ExExtension *extension)
{
    if (!extension)
	return;
    
    gather_symbols_definition (extension->definitions);
}

static void
gather_symbols_request (ExRequest *request)
{
    if (!request)
	return;
    
    gather_symbols_field (request->parameters);
    gather_symbols_field (request->reply);
    gather_symbols_identifier (request->errors);
}

static void
gather_symbols_type_def (ExTypeDef *type_def)
{
    if (!type_def)
	return;
    
    gather_symbols_type (type_def->type);
}

static void
gather_symbols_error (ExError *error)
{
    if (!error)
	return;
}

static void
gather_symbols_event (ExEvent *event)
{
    if (!event)
	return;
    
    gather_symbols_field (event->fields);
}

static void
gather_symbols_identifier (ExIdentifier *identifier)
{
    if (!identifier)
	return;
    
    gather_symbols_identifier (identifier->next);
}

static void
gather_symbols_type (ExType *type)
{
    if (!type)
	return;
    
    switch (type->type)
    {
    case EX_TYPE_UNION:
	gather_symbols_field (type->u._struct.fields);
	break;
	
    case EX_TYPE_LIST:
	gather_symbols_type (type->u._list.type);
	break;
	
    case EX_TYPE_ENUM:
	gather_symbols_identifier (type->u._enum.identifiers);
	break;
	
    case EX_TYPE_STRUCT:
	gather_symbols_field (type->u._struct.fields);
	break;
	
    case EX_TYPE_BITS:
	gather_symbols_identifier (type->u.bits.fields);
	break;
	
    case EX_TYPE_MASKED_LIST:
	gather_symbols_field (type->u.masked_list.fields);
	break;

    case EX_TYPE_CARD8:
    case EX_TYPE_CARD16:
    case EX_TYPE_CARD32:
    case EX_TYPE_CARD64:
    case EX_TYPE_INT8:
    case EX_TYPE_INT16:
    case EX_TYPE_INT32:
    case EX_TYPE_INT64:
    case EX_TYPE_BOOLEAN:
    case EX_TYPE_IDENTIFIER:
    case EX_TYPE_XID:
    case EX_TYPE_DERIVED_BITS:
	break;
    }
}

static void
gather_symbols_field (ExField *field)
{
    if (!field)
	return;
    
    gather_symbols_type (field->type);
    gather_symbols_field (field->next);
}