/* ScummVM - Graphic Adventure Engine
 *
 * ScummVM is the legal property of its developers, whose names
 * are too numerous to list here. Please refer to the COPYRIGHT
 * file distributed with this source distribution.
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 */

#ifndef GLK_ALAN2_ACODE
#define GLK_ALAN2_ACODE

#include "common/stream.h"

namespace Glk {
namespace Alan2 {

typedef size_t Aptr;            /* Type for an ACODE memory address */

typedef uint32 Aword;           /* Type for an ACODE word */
typedef uint32 Aaddr;           /* Type for an ACODE address */
typedef uint32 Abool;           /* Type for an ACODE Boolean value */
typedef int32 Aint;             /* Type for an ACODE Integer value */
typedef int CodeValue;          /* Definition for the packing process */

/* Constants for the Acode file, words/block & bytes/block */
#define BLOCKLEN 256L
#define BLOCKSIZE (BLOCKLEN*sizeof(Aword))

/* Definitions for the packing process */
#define VALUEBITS 16

#define EOFChar 256
#define TOPVALUE (((CodeValue)1<<VALUEBITS) - 1) /* Highest value possible */

/* Half and quarter points in the code value range */
#define ONEQUARTER (TOPVALUE/4+1)   /* Point after first quarter */
#define HALF (2*ONEQUARTER)     /* Point after first half */
#define THREEQUARTER (3*ONEQUARTER) /* Point after third quarter */


/* AMACHINE Word Classes */
typedef int WrdKind;
#define  WRD_SYN 0      /* 1 - Synonym */
#define  WRD_ADJ 1      /* 2 - Adjective */
#define  WRD_ALL 2      /* 4 - All */
#define  WRD_BUT 3      /* 8 - But */
#define  WRD_CONJ 4     /* 16 - Conjunction */
#define  WRD_PREP 5     /* 32 - Preposition */
#define  WRD_DIR 6      /* 64 - Direction */
#define  WRD_IT 7       /* 128 - It */
#define  WRD_NOISE 8        /* 256 - Noise word */
#define  WRD_NOUN 9     /* 512 - Noun */
#define  WRD_ACT 10     /* 1024 - Actor */
#define  WRD_THEM 11        /* 2048 - Them */
#define  WRD_VRB 12     /* 4096 - Verb */
#define  WRD_CLASSES 13



/* Syntax element classifications */
// End of data
#define EOD ((uint32)-1)
// End of syntax
#define EOS ((uint32)-2)

/* Syntax element flag bits */
#define MULTIPLEBIT 0x1
#define OMNIBIT 0x2


/* Parameter Classes */
enum ClaKind {      /* NOTE! These must have the same order as */
	CLA_OBJ = 1,          /* the name classes in NAM.H */
	CLA_CNT = (int)CLA_OBJ << 1,
	CLA_ACT = (int)CLA_CNT << 1,
	CLA_NUM = (int)CLA_ACT << 1,
	CLA_STR = (int)CLA_NUM << 1,
	CLA_COBJ = (int)CLA_STR << 1,
	CLA_CACT = (int)CLA_COBJ << 1
};


/* Verb Qualifiers */
enum QualClass {
	Q_DEFAULT,
	Q_AFTER,
	Q_BEFORE,
	Q_ONLY
};


/* The AMACHINE Operations */
enum OpClass {
	C_CONST,
	C_STMOP,
	C_CURVAR
};

enum InstClass {
	I_PRINT,          /* Print a string from the text file */
	I_QUIT,
	I_LOOK,
	I_SAVE,
	I_RESTORE,
	I_LIST,           /* List contents of a container */
	I_EMPTY,
	I_SCORE,
	I_VISITS,
	I_SCHEDULE,
	I_CANCEL,
	I_LOCATE,
	I_MAKE,
	I_SET,            /* Set a numeric attribute to the */
	/* value on top of stack */
	I_STRSET,         /* Set a string valued attribute to a */
	/* copy of the string on top of stack, */
	/* deallocate current contents first */
	I_GETSTR,         /* Get a string contents from text */
	/* file, create a copy and push it */
	/* on top of stack */
	I_INCR,           /* Increment an attribute */
	I_DECR,           /* Decrement a numeric attribute */
	I_USE,
	I_IN,
	I_DESCRIBE,
	I_SAY,
	I_SAYINT,
	I_SAYSTR,
	I_IF,
	I_ELSE,
	I_ENDIF,
	I_ATTRIBUTE,
	I_STRATTR,            /* Push a copy of a string attribute */
	I_HERE,
	I_NEAR,
	I_WHERE,
	I_AND,
	I_OR,
	I_NE,
	I_EQ,
	I_STREQ,          /* String compare */
	I_STREXACT,
	I_LE,
	I_GE,
	I_LT,
	I_GT,
	I_PLUS,
	I_MINUS,
	I_MULT,
	I_DIV,
	I_NOT,
	I_UMINUS,
	I_RND,
	I_SUM,            /* SUM-aggregate */
	I_MAX,            /* MAX-aggregate */
	I_COUNT,          /* COUNT-aggregate */
	I_RETURN,
	I_SYSTEM,
	I_RESTART,            /* INTRODUCED: v2.7 */
	I_BTW,            /* INTRODUCED: v2.8 */
	I_CONTAINS,           /*  -""-  */
	I_DEPSTART,           /*  -""-  */
	I_DEPCASE,            /*  -""-  */
	I_DEPEXEC,            /*  -""-  */
	I_DEPELSE,            /*  -""-  */
	I_DEPEND          /*  -""-  */
};


enum VarClass {
	V_PARAM,
	V_CURLOC,
	V_CURACT,
	V_CURVRB,
	V_SCORE
};


#define I_CLASS(x) ((x)>>28)
#define I_OP(x)    ((x&0x8000000)?(x)|0x0f0000000:(x)&0x0fffffff)

#include "common/pack-start.h"  // START STRUCT PACKING

/**
  * Game header
  */
struct AcdHdr {
	/* Important info */
	char vers[4];       /* 01 - Version of compiler */
	Aword size;         /* 02 - Size of ACD-file in Awords */
	/* Options */
	Abool pack;         /* 03 - Is the text packed ? */
	Aword paglen;       /* 04 - Unused - Length of a page */
	Aword pagwidth;     /* 05 - Unused - and width */
	Aword debug;        /* 06 - Option debug */
	/* Data structures */
	Aaddr dict;         /* 07 - Dictionary */
	Aaddr oatrs;        /* 08 - Object default attributes */
	Aaddr latrs;        /* 09 - Location default attributes */
	Aaddr aatrs;        /* 0a - Actor default attributes */
	Aaddr acts;         /* 0b - Actor table */
	Aaddr objs;         /* 0c - Object table */
	Aaddr locs;         /* 0d - Location table */
	Aaddr stxs;         /* 0e - Syntax table */
	Aaddr vrbs;         /* 0f - Verb table */
	Aaddr evts;         /* 10 - Event table */
	Aaddr cnts;         /* 11 - Container table */
	Aaddr ruls;         /* 12 - Rule table */
	Aaddr init;         /* 13 - String init table */
	Aaddr start;        /* 14 - Start code */
	Aword msgs;         /* 15 - Messages table */
	/* Miscellaneous */
	Aword objmin, objmax;       /* 16 - Interval for object codes */
	Aword actmin, actmax;       /* 18 - Interval for actor codes */
	Aword cntmin, cntmax;       /* 1a - Interval for container codes */
	Aword locmin, locmax;       /* 1c - Interval for location codes */
	Aword dirmin, dirmax;       /* 1e - Interval for direction codes */
	Aword evtmin, evtmax;       /* 20 - Interval for event codes */
	Aword rulmin, rulmax;       /* 22 - Interval for rule codes */
	Aword maxscore;     /* 24 - Maximum score */
	Aaddr scores;       /* 25 - Score table */
	Aaddr freq;         /* 26 - Address to Char freq's for coding */
	Aword acdcrc;       /* 27 - Checksum for acd code (excl. hdr) */
	Aword txtcrc;       /* 28 - Checksum for text data file */
} PACKED_STRUCT;

#include "common/pack-end.h"    // END STRUCT PACKING

/* Error message numbers */
enum MsgKind {
	M_HUH,            /* Obsolete */
	M_WHAT,
	M_WHAT_ALL,
	M_WHAT_IT,
	M_WHAT_THEM,
	M_MULTIPLE,
	M_WANT,
	M_NOUN,
	M_AFTER_BUT,
	M_BUT_ALL,
	M_NOT_MUCH,
	M_WHICH_ONE,
	M_NO_SUCH,
	M_NO_WAY,
	M_CANT0,
	M_CANT,
	M_NOTHING,            /* Obsolete */
	M_SEEOBJ1,
	M_SEEOBJ2,
	M_SEEOBJ3,
	M_SEEOBJ4,
	M_SEEACT,
	M_CONTAINS1,
	M_CONTAINS2,
	M_CONTAINS3,
	M_CONTAINS4,
	M_CONTAINS5,
	M_EMPTY1,
	M_EMPTY2,
	M_SCORE1,
	M_SCORE2,
	M_UNKNOWN_WORD,
	M_MORE,
	M_AGAIN,
	M_SAVEWHERE,
	M_SAVEOVERWRITE,
	M_SAVEFAILED,
	M_SAVEMISSING,
	M_SAVEVERS,
	M_SAVENAME,
	M_RESTOREFROM,
	M_REALLY,         /* CHANGED: v2.7 from M_RESTART */
	M_QUITACTION,         /* INTRODUCED: v2.7, so M_ARTICLE moved */
	M_ARTICLE,            /* INTRODUCED: v2.6 but replaced the M_NOMSG*/
	MSGMAX
};

#define M_ARTICLE26 M_QUITACTION
#define M_MSGMAX26 M_ARTICLE

} // End of namespace Alan2
} // End of namespace Glk

#endif