/* Copyright (c) 2002-2018 Pigeonhole authors, see the included COPYING file
 */

#include "sieve-ast.h"
#include "sieve-validator.h"
#include "sieve-generator.h"
#include "sieve-binary.h"

#include "sieve-commands.h"
#include "sieve-code.h"
#include "sieve-interpreter.h"

/*
 * True/False test command
 */

static bool tst_false_validate_const
	(struct sieve_validator *valdtr, struct sieve_command *tst,
		int *const_current, int const_next);
static bool tst_false_generate
	(const struct sieve_codegen_env *cgenv, struct sieve_command *cmd,
		struct sieve_jumplist *jumps, bool jump_true);

const struct sieve_command_def tst_false = {
	.identifier = "false",
	.type = SCT_TEST,
	.positional_args = 0,
	.subtests = 0,
	.block_allowed = FALSE,
	.block_required = FALSE,
	.validate_const = tst_false_validate_const,
	.control_generate = tst_false_generate
};

static bool tst_true_validate_const
	(struct sieve_validator *valdtr, struct sieve_command *tst,
		int *const_current, int const_next);
static bool tst_true_generate
	(const struct sieve_codegen_env *cgenv, struct sieve_command *cmd,
		struct sieve_jumplist *jumps, bool jump_true);

const struct sieve_command_def tst_true = {
	.identifier = "true",
	.type = SCT_TEST,
	.positional_args = 0,
	.subtests = 0,
	.block_allowed = FALSE,
	.block_required = FALSE,
	.validate_const = tst_true_validate_const,
	.control_generate = tst_true_generate
};

/*
 * Code validation
 */

static bool tst_false_validate_const
(struct sieve_validator *valdtr ATTR_UNUSED,
	struct sieve_command *tst ATTR_UNUSED, int *const_current,
	int const_next ATTR_UNUSED)
{
	*const_current = 0;
	return TRUE;
}

static bool tst_true_validate_const
(struct sieve_validator *valdtr ATTR_UNUSED,
	struct sieve_command *tst ATTR_UNUSED, int *const_current,
	int const_next ATTR_UNUSED)
{
	*const_current = 1;
	return TRUE;
}

/*
 * Code generation
 */

static bool tst_false_generate
(const struct sieve_codegen_env *cgenv,
	struct sieve_command *cmd ATTR_UNUSED,
	struct sieve_jumplist *jumps, bool jump_true)
{
	if ( !jump_true ) {
		sieve_operation_emit(cgenv->sblock, NULL, &sieve_jmp_operation);
		sieve_jumplist_add(jumps, sieve_binary_emit_offset(cgenv->sblock, 0));
	}

	return TRUE;
}

static bool tst_true_generate
(const struct sieve_codegen_env *cgenv,
	struct sieve_command *cmd ATTR_UNUSED,
	struct sieve_jumplist *jumps, bool jump_true)
{
	if ( jump_true ) {
		sieve_operation_emit(cgenv->sblock, NULL, &sieve_jmp_operation);
		sieve_jumplist_add(jumps, sieve_binary_emit_offset(cgenv->sblock, 0));
	}

	return TRUE;
}