/*
 * Copyright © Michael Smith <mikesmiffy128@gmail.com>
 *
 * Permission to use, copy, modify, and/or distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED “AS IS” AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
 * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
 * AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
 * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
 * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
 * OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
 * PERFORMANCE OF THIS SOFTWARE.
 */

#ifndef INC_CMETA_H
#define INC_CMETA_H

#include "../chunklets/clex.h" /* XXX: only need this for struct, kinda leaky */
#include "../intdefs.h"
#include "../os.h"

enum cmeta_itemtype {
	CMETA_ITEM_DEF_CVAR, /* includes all min/max/unreg variants */
	CMETA_ITEM_DEF_CCMD, /* includes plusminus/unreg variants */
	CMETA_ITEM_DEF_EVENT, /* includes predicates */
	CMETA_ITEM_HANDLE_EVENT,
	CMETA_ITEM_FEATURE,
	CMETA_ITEM_REQUIRE, /* includes all REQUIRE_* and REQUEST variants */
	CMETA_ITEM_GAMESPECIFIC,
	CMETA_ITEM_PREINIT,
	CMETA_ITEM_INIT,
	CMETA_ITEM_END
};

enum cmeta_flag_cvar {
	CMETA_CVAR_UNREG = 1,
	CMETA_CVAR_FEAT = 2,
};
enum cmeta_flag_ccmd {
	CMETA_CCMD_UNREG = 1,
	CMETA_CCMD_FEAT = 2,
	CMETA_CCMD_PLUSMINUS = 4
};
enum cmeta_flag_event {
	CMETA_EVENT_ISPREDICATE = 1
};
enum cmeta_flag_require {
	CMETA_REQUIRE_OPTIONAL = 1, /* i.e. REQUEST() macro, could be extended */
	CMETA_REQUIRE_GAMEDATA = 2,
	CMETA_REQUIRE_GLOBAL = 4
};

struct cmeta {
	char *sbase;
	u32 nitems; /* number of interesting macros */
	//char pad[4];
	struct cmeta_item {
		u8 type : 4; /* CMETA_ITEM_* enum value */
		u8 flags : 4; /* relevant flags (see above) */
	} *items;
	u32 *itemtoks; /* internal */
	struct clex lexer; /* internal */
};

struct cmeta_slice { const char *s; int len; };

struct cmeta cmeta_loadfile(const os_char *path);

int cmeta_nparams(const struct cmeta *cm, u32 i);
struct cmeta_param_iter { u32 i; };
struct cmeta_param_iter cmeta_param_iter_init(const struct cmeta *cm, u32 i);
struct cmeta_slice cmeta_param_iter(const struct cmeta *cm,
		struct cmeta_param_iter *it);

#define cmeta_param_foreach(varname, cm, i) \
	switch (0) for (struct cmeta_slice varname; 0;) default: \
		for (struct cmeta_param_iter _it = cmeta_param_iter_init(cm, i); \
				varname = cmeta_param_iter(cm, &_it), varname.s;) \
			/* {...} */

u32 cmeta_line(const struct cmeta *cm, u32 i);

#endif

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