/**
 * \file libyasm/valparam.h
 * \brief YASM value/parameter interface.
 *
 * \rcs
 * $Id$
 * \endrcs
 *
 * \license
 *  Copyright (C) 2001  Peter Johnson
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *  - Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *  - Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND OTHER CONTRIBUTORS ``AS IS''
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR OTHER CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 * \endlicense
 */
#ifndef YASM_VALPARAM_H
#define YASM_VALPARAM_H

#ifdef YASM_LIB_INTERNAL
/** Value/parameter pair.  \internal */
struct yasm_valparam {
    /*@reldef@*/ STAILQ_ENTRY(yasm_valparam) link;  /**< Next pair in list */
    /*@owned@*/ /*@null@*/ char *val;		/**< Value */
    /*@owned@*/ /*@null@*/ yasm_expr *param;	/**< Parameter */
};

/** Linked list of value/parameter pairs.  \internal */
/*@reldef@*/ STAILQ_HEAD(yasm_valparamhead, yasm_valparam);
#endif

/** Create a new valparam.
 * \param v	value
 * \param p	parameter
 * \return Newly allocated valparam.
 */
yasm_valparam *yasm_vp_create(/*@keep@*/ char *v, /*@keep@*/ yasm_expr *p);

/** Create a new linked list of valparams.
 * \return Newly allocated valparam list.
 */
yasm_valparamhead *yasm_vps_create(void);

/** Destroy a list of instruction operands (created with yasm_vps_create).
 * \param headp		list of instruction operands
 */
void yasm_vps_destroy(yasm_valparamhead *headp);

#ifdef YASM_LIB_INTERNAL
/** Initialize linked list of valparams.
 * \param headp	linked list
 */
#define yasm_vps_initialize(headp)	STAILQ_INIT(headp)

/** Destroy (free allocated memory for) linked list of valparams (created with
 * yasm_vps_initialize).
 * \warning Deletes val/params.
 * \param headp	linked list
 */
void yasm_vps_delete(yasm_valparamhead *headp);
#endif

/** Append valparam to tail of linked list.
 * \param headp	linked list
 * \param vp	valparam
 */
void yasm_vps_append(yasm_valparamhead *headp, /*@keep@*/ yasm_valparam *vp);
#ifdef YASM_LIB_INTERNAL
#define yasm_vps_append(headp, vp)	do {	    \
	if (vp)					    \
	    STAILQ_INSERT_TAIL(headp, vp, link);    \
    } while(0)
#endif

/** Get first valparam in linked list.
 * \param headp	linked list
 * \return First valparam in linked list.
 */
/*@null@*/ /*@dependent@*/ yasm_valparam *yasm_vps_first
    (yasm_valparamhead *headp);
#ifdef YASM_LIB_INTERNAL
#define yasm_vps_first(headp)	    STAILQ_FIRST(headp)
#endif

/** Get next valparam in linked list.
 * \param cur	previous valparam in linked list
 * \return Next valparam in linked list.
 */
/*@null@*/ /*@dependent@*/ yasm_valparam *yasm_vps_next(yasm_valparam *cur);
#ifdef YASM_LIB_INTERNAL
#define yasm_vps_next(cur)	    STAILQ_NEXT(cur, link)

/** Iterate through linked list of valparams.
 * \internal
 * \param iter	    iterator variable
 * \param headp	    linked list
 */
#define yasm_vps_foreach(iter, headp)	STAILQ_FOREACH(iter, headp, link)
#endif

/** Print linked list of valparams.  For debugging purposes.
 * \param f	file
 * \param headp	linked list
 */
void yasm_vps_print(/*@null@*/ const yasm_valparamhead *headp, FILE *f);

#endif