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// file : build/operation -*- C++ -*-
// copyright : Copyright (c) 2014-2015 Code Synthesis Tools CC
// license : MIT; see accompanying LICENSE file
#ifndef BUILD_OPERATION
#define BUILD_OPERATION
#include <string>
#include <cstdint>
#include <iosfwd>
#include <build/utility> // string_table
namespace build
{
// While we are using uint8_t for the meta/operation ids, we assume
// that each is limited to 4 bits (max 128 entries) so that we can
// store the combined action id in uint8_t as well. This makes our
// life easier when it comes to defining switch labels for action
// ids (no need to mess with endian-ness).
//
// Note that 0 is not a valid meta/operation/action id.
//
using meta_operation_id = std::uint8_t;
using operation_id = std::uint8_t;
using action_id = std::uint8_t;
struct action
{
action (meta_operation_id m, operation_id o): id ((m << 4) | o) {}
meta_operation_id
meta_operation () const {return id >> 4;}
operation_id
operation () const {return id & 0xF;}
// Implicit conversion operator to action_id for the switch()
// statement, etc.
//
operator action_id () const {return id;}
action_id id;
};
std::ostream&
operator<< (std::ostream&, action);
// Id constants for build-in operations.
//
const meta_operation_id perform_id = 1;
const meta_operation_id configure_id = 2;
const meta_operation_id disfigure_id = 3;
const operation_id update_id = 1;
const operation_id clean_id = 2;
const action_id perform_update_id = (perform_id << 4) | update_id;
const action_id perform_clean_id = (perform_id << 4) | clean_id;
// Meta/operation id tables.
//
using meta_operation_table = string_table<meta_operation_id>;
using operation_table = string_table<operation_id>;
extern meta_operation_table meta_operations;
extern operation_table operations;
}
#endif // BUILD_OPERATION
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