/**************************************************************/
/*  treebnf: a tree oriented bnf library                      */
/*  Copyright (C) 2024  SysDeer Technologies, LLC             */
/*  Released under GPLv2 and GPLv3; see COPYING.TREEBNF.      */
/**************************************************************/

#ifndef TREEBNF_DRIVER_IMPL_H
#define TREEBNF_DRIVER_IMPL_H

#include <stdint.h>
#include <dirent.h>
#include <stdio.h>
#include <sys/stat.h>
#include <sys/types.h>

#include <treebnf/treebnf.h>
#include "argv/argv.h"

#define TBNF_OPTV_ELEMENTS 128

extern const struct argv_option tbnf_default_options[];

enum app_tags {
	TAG_HELP,
	TAG_VERSION,
};

struct tbnf_driver_ctx_impl {
	struct tbnf_common_ctx        cctx;
	struct tbnf_driver_ctx        ctx;
	struct tbnf_fd_ctx            fdctx;
	int                           fdtmpin;
	const struct tbnf_unit_ctx *  euctx;
	const char *                  eunit;
	struct tbnf_error_info **     errinfp;
	struct tbnf_error_info **     erricap;
	struct tbnf_error_info *      erriptr[64];
	struct tbnf_error_info        erribuf[64];
};

struct tbnf_unit_ctx_impl {
	const char *		path;
	struct tbnf_unit_ctx	uctx;
	struct tbnf_raw_input   map;
	struct stat		st;
};


static inline struct tbnf_driver_ctx_impl * tbnf_get_driver_ictx(
	const struct tbnf_driver_ctx * dctx)
{
        uintptr_t addr;

        if (dctx) {
                addr = (uintptr_t)dctx - offsetof(struct tbnf_driver_ctx_impl,ctx);
                return (struct tbnf_driver_ctx_impl *)addr;
        }

        return 0;
}

static inline struct tbnf_unit_ctx_impl * tbnf_get_unit_ictx(
	const struct tbnf_unit_ctx * uctx)
{
	struct tbnf_unit_ctx_impl *	ictx;
	uintptr_t			addr;

	addr = (uintptr_t)uctx - offsetof(struct tbnf_unit_ctx_impl,uctx);
	ictx = (struct tbnf_unit_ctx_impl *)addr;
	return ictx;
}

static inline void tbnf_driver_set_ectx(
	const struct tbnf_driver_ctx * dctx,
	const struct tbnf_unit_ctx *   uctx,
	const char *                 unit)
{
	struct tbnf_driver_ctx_impl *  ictx;

	ictx        = tbnf_get_driver_ictx(dctx);
	ictx->euctx = uctx;
	ictx->eunit = unit;
}

static inline int tbnf_driver_fdin(const struct tbnf_driver_ctx * dctx)
{
	struct tbnf_fd_ctx fdctx;
	tbnf_lib_get_driver_fdctx(dctx,&fdctx);
	return fdctx.fdin;
}

static inline int tbnf_driver_fdout(const struct tbnf_driver_ctx * dctx)
{
	struct tbnf_fd_ctx fdctx;
	tbnf_lib_get_driver_fdctx(dctx,&fdctx);
	return fdctx.fdout;
}

static inline int tbnf_driver_fderr(const struct tbnf_driver_ctx * dctx)
{
	struct tbnf_fd_ctx fdctx;
	tbnf_lib_get_driver_fdctx(dctx,&fdctx);
	return fdctx.fderr;
}

static inline int tbnf_driver_fdlog(const struct tbnf_driver_ctx * dctx)
{
	struct tbnf_fd_ctx fdctx;
	tbnf_lib_get_driver_fdctx(dctx,&fdctx);
	return fdctx.fdlog;
}

static inline int tbnf_driver_fdcwd(const struct tbnf_driver_ctx * dctx)
{
	struct tbnf_fd_ctx fdctx;
	tbnf_lib_get_driver_fdctx(dctx,&fdctx);
	return fdctx.fdcwd;
}

static inline int tbnf_driver_fddst(const struct tbnf_driver_ctx * dctx)
{
	struct tbnf_fd_ctx fdctx;
	tbnf_lib_get_driver_fdctx(dctx,&fdctx);
	return fdctx.fddst;
}

#endif