gzdoom/code/D_dehack.c

#include <stdio.h>
#include <stdlib.h>
#include <malloc.h>
#include <string.h>
#include <stddef.h>

#include "doomtype.h"
#include "doomstat.h"
#include "info.h"
#include "d_dehack.h"
#include "s_sound.h"
#include "d_items.h"
#include "g_level.h"
#include "m_cheat.h"
#include "cmdlib.h"
#include "dstrings.h"
#include "m_alloc.h"
#include "m_misc.h"
#include "w_wad.h"


// Miscellaneous info that used to be constant
struct DehInfo deh = {
	100,	// .StartHealth
	 50,	// .StartBullets
	100,	// .MaxHealth
	200,	// .MaxArmor
	  1,	// .GreenAC
	  2,	// .BlueAC
	200,	// .MaxSoulsphere
	100,	// .SoulsphereHealth
	200,	// .MegasphereHealth
	100,	// .GodHealth
	200,	// .FAArmor
	  2,	// .FAAC
	200,	// .KFAArmor
	  2,	// .KFAAC
	 40,	// .BFGCells
	  0,	// .Infight
};

// These are the original heights of every Doom 2 thing. They are used if a patch
// specifies that a thing should be hanging from the ceiling but doesn't specify
// a height for the thing, since these are the heights it probably wants.

static byte OrgHeights[] = {
	56, 56, 56, 56, 16, 56, 8, 16, 64, 8, 56, 56,
	56, 56, 56, 64, 8, 64, 56, 100, 64, 110, 56, 56,
	72, 16, 32, 32, 32, 16, 42, 8, 8, 8,
	8, 8, 8, 16, 16, 16, 16, 16, 16, 16,
	16, 16, 16, 16, 16, 16, 16, 16, 16, 16,
	16, 16, 16, 16, 16, 16, 16, 16, 16, 16,
	16, 16, 16, 16, 16, 16, 16, 16, 16, 16,
	16, 16, 16, 16, 16, 16, 16, 16, 16, 16,
	16, 16, 16, 16, 16, 16, 16, 16, 16, 16,
	16, 16, 16, 16, 16, 16, 16, 68, 84, 84,
	68, 52, 84, 68, 52, 52, 68, 16, 16, 16,
	16, 16, 16, 16, 16, 16, 16, 16, 16, 16,
	16, 16, 16, 16, 88, 88, 64, 64, 64, 64,
	16, 16, 16
};

#define LINESIZE 2048

#define CHECKKEY(a,b)		if (!stricmp (Line1, (a))) (b) = atoi(Line2);

static char *PatchFile, *PatchPt;
static char *Line1, *Line2;
static int	 dversion, pversion;
static BOOL  including, includenotext;

static const char *unknown_str = "Unknown key %s encountered in %s %d.\n";

// This is an offset to be used for computing the text stuff.
// Straight from the DeHackEd source which was
// Written by Greg Lewis, gregl@umich.edu.
static int toff[] = {129044, 129044, 129044, 129284, 129380};

// A conversion array to convert from the 448 code pointers to the 966
// Frames that exist.
// Again taken from the DeHackEd source.
static short codepconv[448] = {  1,    2,   3,   4,    6,   9,  10,   11,  12,  14,
							  16,   17,  18,  19,   20,  22,  29,   30,  31,  32,
							  33,	 34,  36,  38,	 39,  41,  43,	 44,  47,  48,
							  49,	50,  51,  52,	 53,  54,  55,	 56,  57,  58,
							  59,	60,  61,  62,	 63,  65,  66,	 67,  68,  69,
							  70,    71,  72,  73,	 74,  75,  76,	 77,  78,  79,
							  80,	 81,  82,  83,  84,  85,  86,	 87,  88,  89,
							 119,	127, 157, 159,	160, 166, 167,	174, 175, 176,
							 177,	178, 179, 180,	181, 182, 183,	184, 185, 188,
							 190,	191, 195, 196,	207, 208, 209,	210, 211, 212,
							 213,	214, 215, 216,	217, 218, 221,	223, 224, 228,
							 229,	241, 242, 243,	244, 245, 246,	247, 248, 249,
							 250,	251, 252, 253,	254, 255, 256,  257, 258, 259,
							 260,	261, 262, 263,	264, 270, 272,	273, 281, 282,
							 283,	284, 285, 286, 287, 288, 289,	290, 291, 292,
							 293,	294, 295, 296,	297, 298, 299,	300, 301, 302,
							 303,	304, 305, 306,	307, 308, 309,	310, 316, 317,
							 321,	322, 323, 324,	325, 326, 327,	328, 329, 330,
							 331,	332, 333, 334, 335, 336, 337,	338, 339, 340,
							 341, 342, 344, 347,	348, 362, 363,	364, 365, 366,
							 367, 368, 369, 370,	371, 372, 373,  374, 375, 376,
							 377, 378, 379, 380,	381, 382, 383,	384, 385, 387,
							 389, 390, 397, 406,	407, 408, 409,	410, 411, 412,
							 413, 414, 415, 416,	417, 418, 419,	421, 423, 424,
							 430, 431, 442, 443,	444, 445, 446,	447, 448, 449,
							 450, 451, 452, 453,	454, 456, 458,	460, 463, 465,
							 475, 476, 477, 478,	479, 480, 481,	482, 483, 484,
							 485, 486, 487, 489,	491, 493, 502,	503, 504, 505,
							 506, 508, 511, 514,	527, 528, 529,	530, 531, 532,
							 533, 534, 535, 536,	537, 538, 539,	541, 543, 545,
							 548, 556, 557, 558,	559, 560, 561,	562, 563, 564,
							 565, 566, 567, 568,	570, 572, 574,	585, 586, 587,
							 588, 589, 590, 594,	596, 598, 601,	602, 603, 604,
							 605, 606, 607, 608,	609, 610, 611,	612, 613, 614,
							 615, 616, 617, 618,	620, 621, 622,	631, 632, 633,
							 635, 636, 637, 638,	639, 640, 641,	642, 643, 644,
							 645, 646, 647, 648,	650, 652, 653,	654, 659, 674,
							 675, 676, 677, 678,	679, 680, 681,	682, 683, 684,
							 685, 686, 687, 688,	689, 690, 692,	696, 700, 701,
							 702, 703, 704, 705,	706, 707, 708,	709, 710, 711,
							 713, 715, 718, 726,	727, 728, 729,	730, 731, 732,
							 733, 734, 735, 736,	737, 738, 739,	740, 741, 743,
							 745, 746, 750, 751,	766, 774, 777,	779, 780, 783,
							 784, 785, 786, 787,	788, 789, 790,	791, 792, 793,
							 794, 795, 796, 797,	798, 801, 809,	811};

BOOL BackedUpData = false;
// This is the original data before it gets replaced by a patch.
//char *OrgSfxNames[NUMSFX];
char *OrgSprNames[NUMSPRITES];
actionf_t OrgActionPtrs[NUMSTATES];

// Sound equivalences. When a patch tries to change a sound,
// use these sound names.
char *SoundMap[] = {
	NULL,
	"weapons/pistol",
	"weapons/shotgf",
	"weapons/shotgr",
	"weapons/sshotf",
	"weapons/sshoto",
	"weapons/sshotc",
	"weapons/sshotl",
	"weapons/plasmaf",
	"weapons/bfgf",
	"weapons/sawup",
	"weapons/sawidle",
	"weapons/sawfull",
	"weapons/sawhit",
	"weapons/rocklf",
	"weapons/bfgx",
	"imp/attack",
	"imp/shotx",
	"plats/pt1_strt",
	"plats/pt1_stop",
	"doors/dr1_open",
	"doors/dr1_clos",
	"plats/pt1_mid",
	"switches/normbutn",
	"switches/exitbutn",
	"*pain100_1",
	"demon/pain",
	"grunt/pain",
	"vile/pain",
	"fatso/pain",
	"pain/pain",
	"misc/gibbed",
	"misc/i_pkup",
	"misc/w_pkup",
	"*land1",
	"misc/teleport",
	"grunt/sight1",
	"grunt/sight2",
	"grunt/sight3",
	"imp/sight1",
	"imp/sight2",
	"demon/sight",
	"caco/sight",
	"baron/sight",
	"cyber/sight",
	"spider/sight",
	"baby/sight",
	"knight/sight",
	"vile/sight",
	"fatso/sight",
	"pain/sight",
	"skull/melee",
	"demon/melee",
	"skeleton/melee",
	"vile/start",
	"imp/melee",
	"skeleton/swing",
	"*death1",
	"*xdeath1",
	"grunt/death1",
	"grunt/death2",
	"grunt/death3",
	"imp/death1",
	"imp/death2",
	"demon/death",
	"caco/death",
	"misc/unused",
	"baron/death",
	"cyber/death",
	"spider/death",
	"baby/death",
	"vile/death",
	"knight/death",
	"pain/death",
	"skeleton/death",
	"grunt/active",
	"imp/active",
	"demon/active",
	"baby/active",
	"baby/walk",
	"vile/active",
	"*grunt1",
	"world/barrelx",
	"*fist",
	"cyber/hoof",
	"spider/walk",
	"weapons/chngun",
	"misc/chat2",
	"doors/dr2_open",
	"doors/dr2_clos",
	"misc/spawn",
	"vile/firecrkl",
	"vile/firestrt",
	"misc/p_pkup",
	"brain/spit",
	"brain/cube",
	"brain/sight",
	"brain/pain",
	"brain/death",
	"fatso/attack",
	"gatso/death",
	"wolfss/sight",
	"wolfss/death",
	"keen/pain",
	"keen/death",
	"skeleton/active",
	"skeleton/sight",
	"skeleton/attack",
	"misc/chat"
};

// Functions used in a .bex [CODEPTR] chunk
void A_Light0();
void A_WeaponReady();
void A_Lower();
void A_Raise();
void A_Punch();
void A_ReFire();
void A_FirePistol();
void A_Light1();
void A_FireShotgun();
void A_Light2();
void A_FireShotgun2();
void A_CheckReload();
void A_OpenShotgun2();
void A_LoadShotgun2();
void A_CloseShotgun2();
void A_FireCGun();
void A_GunFlash();
void A_FireMissile();
void A_Saw();
void A_FirePlasma();
void A_BFGsound();
void A_FireBFG();
void A_BFGSpray();
void A_Explode();
void A_Pain();
void A_PlayerScream();
void A_Fall();
void A_XScream();
void A_Look();
void A_Chase();
void A_FaceTarget();
void A_PosAttack();
void A_Scream();
void A_SPosAttack();
void A_VileChase();
void A_VileStart();
void A_VileTarget();
void A_VileAttack();
void A_StartFire();
void A_Fire();
void A_FireCrackle();
void A_Tracer();
void A_SkelWhoosh();
void A_SkelFist();
void A_SkelMissile();
void A_FatRaise();
void A_FatAttack1();
void A_FatAttack2();
void A_FatAttack3();
void A_BossDeath();
void A_CPosAttack();
void A_CPosRefire();
void A_TroopAttack();
void A_SargAttack();
void A_HeadAttack();
void A_BruisAttack();
void A_SkullAttack();
void A_Metal();
void A_SpidRefire();
void A_BabyMetal();
void A_BspiAttack();
void A_Hoof();
void A_CyberAttack();
void A_PainAttack();
void A_PainDie();
void A_KeenDie();
void A_BrainPain();
void A_BrainScream();
void A_BrainDie();
void A_BrainAwake();
void A_BrainSpit();
void A_SpawnSound();
void A_SpawnFly();
void A_BrainExplode();

struct CodePtr {
	char *name;
	actionf_t func;
};

static const struct CodePtr CodePtrs[] = {
	{ "NULL",			{(actionf_p1)NULL}, },
	{ "Light0",			{(actionf_p1)A_Light0}, },
	{ "WeaponReady",	{(actionf_p1)A_WeaponReady}, },
	{ "Lower",			{(actionf_p1)A_Lower}, },
	{ "Raise",			{(actionf_p1)A_Raise}, },
	{ "Punch",			{(actionf_p1)A_Punch}, },
	{ "ReFire",			{(actionf_p1)A_ReFire}, },
	{ "FirePistol",		{(actionf_p1)A_FirePistol}, },
	{ "Light1",			{(actionf_p1)A_Light1}, },
	{ "FireShotgun",	{(actionf_p1)A_FireShotgun}, },
	{ "Light2",			{(actionf_p1)A_Light2}, },
	{ "FireShotgun2",	{(actionf_p1)A_FireShotgun2}, },
	{ "CheckReload",	{(actionf_p1)A_CheckReload}, },
	{ "OpenShotgun2",	{(actionf_p1)A_OpenShotgun2}, },
	{ "LoadShotgun2",	{(actionf_p1)A_LoadShotgun2}, },
	{ "CloseShotgun2",	{(actionf_p1)A_CloseShotgun2}, },
	{ "FireCGun",		{(actionf_p1)A_FireCGun}, },
	{ "A_GunFlash",		{(actionf_p1)A_GunFlash}, },
	{ "FireMissile",	{(actionf_p1)A_FireMissile}, },
	{ "Saw",			{(actionf_p1)A_Saw}, },
	{ "FirePlasma",		{(actionf_p1)A_FirePlasma}, },
	{ "BFGsound",		{(actionf_p1)A_BFGsound}, },
	{ "FireBFG",		{(actionf_p1)A_FireBFG}, },
	{ "BFGSpray",		{(actionf_p1)A_BFGSpray}, },
	{ "Explode",		{(actionf_p1)A_Explode}, },
	{ "Pain",			{(actionf_p1)A_Pain}, },
	{ "PlayerScream",	{(actionf_p1)A_PlayerScream}, },
	{ "Fall",			{(actionf_p1)A_Fall}, },
	{ "XScream",		{(actionf_p1)A_XScream}, },
	{ "Look",			{(actionf_p1)A_Look}, },
	{ "Chase",			{(actionf_p1)A_Chase}, },
	{ "FaceTarget",		{(actionf_p1)A_FaceTarget}, },
	{ "PosAttack",		{(actionf_p1)A_PosAttack}, },
	{ "Scream",			{(actionf_p1)A_Scream}, },
	{ "SPosAttack",		{(actionf_p1)A_SPosAttack}, },
	{ "VileChase",		{(actionf_p1)A_VileChase}, },
	{ "VileStart",		{(actionf_p1)A_VileStart}, },
	{ "VileTarget",		{(actionf_p1)A_VileTarget}, },
	{ "VileAttack",		{(actionf_p1)A_VileAttack}, },
	{ "StartFire",		{(actionf_p1)A_StartFire}, },
	{ "Fire",			{(actionf_p1)A_Fire}, },
	{ "FireCrackle",	{(actionf_p1)A_FireCrackle}, },
	{ "Tracer",			{(actionf_p1)A_Tracer}, },
	{ "SkelWhoosh",		{(actionf_p1)A_SkelWhoosh}, },
	{ "SkelFist",		{(actionf_p1)A_SkelFist}, },
	{ "SkelMissile",	{(actionf_p1)A_SkelMissile}, },
	{ "FatRaise",		{(actionf_p1)A_FatRaise}, },
	{ "FatAttack1",		{(actionf_p1)A_FatAttack1}, },
	{ "FatAttack2",		{(actionf_p1)A_FatAttack2}, },
	{ "FatAttack3",		{(actionf_p1)A_FatAttack3}, },
	{ "BossDeath",		{(actionf_p1)A_BossDeath}, },
	{ "CPosAttack",		{(actionf_p1)A_CPosAttack}, },
	{ "CPosRefire",		{(actionf_p1)A_CPosRefire}, },
	{ "TroopAttack",	{(actionf_p1)A_TroopAttack}, },
	{ "SargAttack",		{(actionf_p1)A_SargAttack}, },
	{ "HeadAttack",		{(actionf_p1)A_HeadAttack}, },
	{ "BruisAttack",	{(actionf_p1)A_BruisAttack}, },
	{ "SkullAttack",	{(actionf_p1)A_SkullAttack}, },
	{ "Metal",			{(actionf_p1)A_Metal}, },
	{ "SpidRefire",		{(actionf_p1)A_SpidRefire}, },
	{ "BabyMetal",		{(actionf_p1)A_BabyMetal}, },
	{ "BspiAttack",		{(actionf_p1)A_BspiAttack}, },
	{ "Hoof",			{(actionf_p1)A_Hoof}, },
	{ "CyberAttack",	{(actionf_p1)A_CyberAttack}, },
	{ "PainAttack",		{(actionf_p1)A_PainAttack}, },
	{ "PainDie",		{(actionf_p1)A_PainDie}, },
	{ "KeenDie",		{(actionf_p1)A_KeenDie}, },
	{ "BrainPain",		{(actionf_p1)A_BrainPain}, },
	{ "BrainScream",	{(actionf_p1)A_BrainScream}, },
	{ "BrainDie",		{(actionf_p1)A_BrainDie}, },
	{ "BrainAwake",		{(actionf_p1)A_BrainAwake}, },
	{ "BrainSpit",		{(actionf_p1)A_BrainSpit}, },
	{ "SpawnSound",		{(actionf_p1)A_SpawnSound}, },
	{ "SpawnFly",		{(actionf_p1)A_SpawnFly}, },
	{ "BrainExplode",	{(actionf_p1)A_BrainExplode}, },
	{ NULL, }
};

struct Key {
	char *name;
	ptrdiff_t offset;
};

extern byte cheat_mus_seq[9];
extern byte cheat_choppers_seq[11];
extern byte cheat_god_seq[6];
extern byte cheat_ammo_seq[6];
extern byte cheat_ammonokey_seq[5];
extern byte cheat_noclip_seq[11];
extern byte cheat_commercial_noclip_seq[7];
extern byte cheat_powerup_seq[7][10];
extern byte cheat_clev_seq[10];
extern byte cheat_mypos_seq[8];
extern byte cheat_amap_seq[5];

static int PatchThing (int);
static int PatchSound (int);
static int PatchFrame (int);
static int PatchSprite (int);
static int PatchAmmo (int);
static int PatchWeapon (int);
static int PatchPointer (int);
static int PatchCheats (int);
static int PatchMisc (int);
static int PatchText (int);
static int PatchStrings (int);
static int PatchPars (int);
static int PatchCodePtrs (int);
static int DoInclude (int);

static const struct {
	char *name;
	int (*func)(int);
} Modes[] = {
	// These appear in .deh and .bex files
	{ "Thing",		PatchThing },
	{ "Sound",		PatchSound },
	{ "Frame",		PatchFrame },
	{ "Sprite",		PatchSprite },
	{ "Ammo",		PatchAmmo },
	{ "Weapon",		PatchWeapon },
	{ "Pointer",	PatchPointer },
	{ "Cheat",		PatchCheats },
	{ "Misc",		PatchMisc },
	{ "Text",		PatchText },
	// These appear in .bex files
	{ "include",	DoInclude },
	{ "[STRINGS]",	PatchStrings },
	{ "[PARS]",		PatchPars },
	{ "[CODEPTR]",	PatchCodePtrs },
	{ NULL, },
};

static int HandleMode (const char *mode, int num);
static BOOL HandleKey (const struct Key *keys, void *structure, const char *key, int value);
static void BackupData (void);
static void ChangeCheat (byte *newcheat, byte *cheatseq, BOOL needsval);
static BOOL ReadChars (char **stuff, int size);
static char *igets (void);
static int GetLine (void);


static int HandleMode (const char *mode, int num)
{
	int i = 0;

	while (Modes[i].name && stricmp (Modes[i].name, mode))
		i++;

	if (Modes[i].name)
		return Modes[i].func (num);

	// Handle unknown or unimplemented data
	Printf ("Unknown chunk %s encountered. Skipping.\n", mode);
	do
		i = GetLine ();
	while (i == 1);

	return i;
}

static BOOL HandleKey (const struct Key *keys, void *structure, const char *key, int value)
{
	while (keys->name && stricmp (keys->name, key))
		keys++;

	if (keys->name) {
		*((int *)(((byte *)structure) + keys->offset)) = value;
		return false;
	}

	return true;
}

static void BackUpData (void)
{
	int i;

	if (BackedUpData)
		return;

//	for (i = 0; i < NUMSFX; i++)
//		OrgSfxNames[i] = S_sfx[i].name;

	for (i = 0; i < NUMSPRITES; i++)
		OrgSprNames[i] = sprnames[i];

	for (i = 0; i < NUMSTATES; i++)
		OrgActionPtrs[i] = states[i].action;
}

static void ChangeCheat (byte *newcheat, byte *cheatseq, BOOL needsval)
{
	while (*cheatseq != 0xff && *cheatseq != 1 && *newcheat) {
		*cheatseq++ = SCRAMBLE(*newcheat);
		newcheat++;
	}

	if (needsval) {
		*cheatseq++ = 1;
		*cheatseq++ = 0;
		*cheatseq++ = 0;
	}

	*cheatseq = 0xff;
}

static BOOL ReadChars (char **stuff, int size)
{
	char *str = *stuff;

	if (!size) {
		*str = 0;
		return true;
	}

	do {
		// Ignore carriage returns
		if (*PatchPt != '\r')
			*str++ = *PatchPt;
		else
			size++;

		PatchPt++;
	} while (--size);

	*str = 0;
	return true;
}

static void ReplaceSpecialChars (char *str)
{
	char *p = str, c;
	int i;

	while (c = *p++) {
		if (c != '\\') {
			*str++ = c;
		} else {
			switch (*p) {
				case 'n':
				case 'N':
					*str++ = '\n';
					break;
				case 't':
				case 'T':
					*str++ = '\t';
					break;
				case 'r':
				case 'R':
					*str++ = '\r';
					break;
				case 'x':
				case 'X':
					c = 0;
					p++;
					for (i = 0; i < 2; i++) {
						c <<= 4;
						if (*p >= '0' && *p <= '9')
							c += *p-'0';
						else if (*p >= 'a' && *p <= 'f')
							c += 10 + *p-'a';
						else if (*p >= 'A' && *p <= 'F')
							c += 10 + *p-'A';
						else
							break;
						p++;
					}
					*str++ = c;
					break;
				case '0':
				case '1':
				case '2':
				case '3':
				case '4':
				case '5':
				case '6':
				case '7':
					c = 0;
					for (i = 0; i < 3; i++) {
						c <<= 3;
						if (*p >= '0' && *p <= '7')
							c += *p-'0';
						else
							break;
						p++;
					}
					*str++ = c;
					break;
				default:
					*str++ = *p;
					break;
			}
			p++;
		}
	}
	*str = 0;
}

static char *skipwhite (char *str)
{
	if (str)
		while (*str && isspace(*str))
			*str++;
	return str;
}

static void stripwhite (char *str)
{
	char *end = str + strlen(str) - 1;

	while (end >= str && isspace(*end))
		end--;

	end[1] = '\0';
}

static char *igets (void)
{
	char *line;

	if (*PatchPt == '\0')
		return NULL;

	line = PatchPt;

	while (*PatchPt != '\n' && *PatchPt != '\0')
		PatchPt++;

	if (*PatchPt == '\n')
		*PatchPt++ = 0;

	return line;
}

static int GetLine (void)
{
	char *line, *line2;

	do {
		while ( (line = igets ()) )
			if (line[0] != '#')		// Skip comment lines
				break;

		if (!line)
			return 0;

		Line1 = skipwhite (line);
	} while (Line1 && *Line1 == 0);	// Loop until we get a line with
									// more than just whitespace.
	line = strchr (Line1, '=');

	if (line) {					// We have an '=' in the input line
		line2 = line;
		while (--line2 >= Line1)
			if (*line2 > ' ')
				break;

		if (line2 < Line1)
			return 0;			// Nothing before '='

		*(line2 + 1) = 0;

		line++;
		while (*line && *line <= ' ')
			line++;

		if (*line == 0)
			return 0;			// Nothing after '='

		Line2 = line;

		return 1;
	} else {					// No '=' in input line
		line = Line1 + 1;
		while (*line > ' ')
			line++;				// Get beyond first word

		*line++ = 0;
		while (*line && *line <= ' ')
			line++;				// Skip white space

		//.bex files don't have this restriction
		//if (*line == 0)
		//	return 0;			// No second word

		Line2 = line;

		return 2;
	}
}

static int PatchThing (int thingNum)
{
	static const struct Key keys[] = {
		{ "ID #",				myoffsetof(mobjinfo_t,doomednum) },
		{ "Initial frame",		myoffsetof(mobjinfo_t,spawnstate) },
		{ "Hit points",			myoffsetof(mobjinfo_t,spawnhealth) },
		{ "First moving frame",	myoffsetof(mobjinfo_t,seestate) },
		{ "Reaction time",		myoffsetof(mobjinfo_t,reactiontime) },
		{ "Injury frame",		myoffsetof(mobjinfo_t,painstate) },
		{ "Pain chance",		myoffsetof(mobjinfo_t,painchance) },
		{ "Close attack frame",	myoffsetof(mobjinfo_t,meleestate) },
		{ "Far attack frame",	myoffsetof(mobjinfo_t,missilestate) },
		{ "Death frame",		myoffsetof(mobjinfo_t,deathstate) },
		{ "Exploding frame",	myoffsetof(mobjinfo_t,xdeathstate) },
		{ "Speed",				myoffsetof(mobjinfo_t,speed) },
		{ "Width",				myoffsetof(mobjinfo_t,radius) },
		{ "Height",				myoffsetof(mobjinfo_t,height) },
		{ "Mass",				myoffsetof(mobjinfo_t,mass) },
		{ "Missile damage",		myoffsetof(mobjinfo_t,damage) },
		{ "Bits",				myoffsetof(mobjinfo_t,flags) },
		{ "Respawn frame",		myoffsetof(mobjinfo_t,raisestate) },
		{ NULL, }
	};
	// a .bex extension:
	static const char *bitnames[32] = {
		"SPECIAL",
		"SOLID",
		"SHOOTABLE",
		"NOSECTOR",
		"NOBLOCKMAP",
		"AMBUSH",
		"JUSTHIT",
		"JUSTATTACKED",
		"SPAWNCEILING",
		"NOGRAVITY",
		"DROPOFF",
		"PICKUP",
		"NOCLIP",
		"SLIDE",
		"FLOAT",
		"TELEPORT",
		"MISSILE",
		"DROPPED",
		"SHADOW",
		"NOBLOOD",
		"CORPSE",
		"INFLOAT",
		"COUNTKILL",
		"COUNTITEM",
		"SKULLFLY",
		"NOTDMATCH",
		"TRANSLATION1",
		"TRANSLATION2",
		"STEALTH",
		"TRANSLUC25",
		"TRANSLUCENT",		// (aka TRANSLUC50) BOOM actually has this as the last bit
		"UNUSED1"
	};
	int result;
	mobjinfo_t *info, dummy;
	BOOL hadHeight = false;

	thingNum--;
	if (thingNum >= 0 && thingNum < NUMMOBJTYPES) {
		info = &mobjinfo[thingNum];
		DPrintf ("Thing %d\n", thingNum);
	} else {
		info = &dummy;
		Printf ("Thing %d out of range.\n", thingNum + 1);
	}

	// Turn off transparency for the mobj, since original DOOM
	// didn't have any. If some is wanted, let the patch specify it.
	// Uncomment this if you want to make it so.
	//info->flags &= ~MF_TRANSLUCBITS;

	while ((result = GetLine ()) == 1) {
		int sndmap = atoi (Line2);

		if (sndmap >= sizeof(SoundMap))
			sndmap = 0;

		if (HandleKey (keys, info, Line1, atoi (Line2))) {
			if (!stricmp (Line1, "Alert sound"))
				info->seesound = SoundMap[sndmap];
			else if (!stricmp (Line1, "Attack sound"))
				info->attacksound = SoundMap[sndmap];
			else if (!stricmp (Line1, "Pain sound"))
				info->painsound = SoundMap[sndmap];
			else if (!stricmp (Line1, "Death sound"))
				info->deathsound = SoundMap[sndmap];
			else if (!stricmp (Line1, "Action sound"))
				info->activesound = SoundMap[sndmap];
			else Printf (unknown_str, Line1, "Thing", thingNum);
		} else if (!stricmp (Line1, "Height")) {
			hadHeight = true;
		} else if (!stricmp (Line1, "Bits")) {
			if (!IsNum (Line2)) {
				char *data = COM_Parse (Line2);

				while (data) {
					int i = 0;

					for (i = 0; i < 32; i++)
						if (!stricmp (bitnames[i], com_token))
							break;

					if (i == 32)
						Printf ("Unknown bit %s\n", com_token);
					else
						info->flags += 1 << i;
					data = COM_Parse (data);
				}
				DPrintf ("Flags: %d\n", info->flags);
			}
		}
	}

	if (info->flags & MF_SPAWNCEILING && !hadHeight && thingNum < sizeof(OrgHeights))
		info->height = OrgHeights[thingNum] * FRACUNIT;

	return result;
}

static int PatchSound (int soundNum)
{
	int result;

	DPrintf ("Sound %d (no longer supported)\n", soundNum);
/*
	sfxinfo_t *info, dummy;
	int offset = 0;
	if (soundNum >= 1 && soundNum <= NUMSFX) {
		info = &S_sfx[soundNum];
	} else {
		info = &dummy;
		Printf ("Sound %d out of range.\n");
	}
*/
	while ((result = GetLine ()) == 1) {
		/*
		if (!stricmp  ("Offset", Line1))
			offset = atoi (Line2);
		else CHECKKEY ("Zero/One",			info->singularity)
		else CHECKKEY ("Value",				info->priority)
		else CHECKKEY ("Zero 1",			info->link)
		else CHECKKEY ("Neg. One 1",		info->pitch)
		else CHECKKEY ("Neg. One 2",		info->volume)
		else CHECKKEY ("Zero 2",			info->data)
		else CHECKKEY ("Zero 3",			info->usefulness)
		else CHECKKEY ("Zero 4",			info->lumpnum)
		else Printf (unknown_str, Line1, "Sound", soundNum);
		*/
	}
/*
	if (offset) {
		// Calculate offset from start of sound names
		offset -= toff[dversion] + 21076;

		if (offset <= 64)			// pistol .. bfg
			offset >>= 3;
		else if (offset <= 260)		// sawup .. oof
			offset = (offset + 4) >> 3;
		else						// telept .. skeatk
			offset = (offset + 8) >> 3;

		if (offset >= 0 && offset < NUMSFX) {
			S_sfx[soundNum].name = OrgSfxNames[offset + 1];
		} else {
			Printf ("Sound name %d out of range.\n", offset + 1);
		}
	}
*/
	return result;
}

static int PatchFrame (int frameNum)
{
	static const struct Key keys[] = {
		{ "Sprite number",		myoffsetof(state_t,sprite) },
		{ "Sprite subnumber",	myoffsetof(state_t,frame) },
		{ "Duration",			myoffsetof(state_t,tics) },
		{ "Next frame",			myoffsetof(state_t,nextstate) },
		{ "Unknown 1",			myoffsetof(state_t,misc1) },
		{ "Unknown 2",			myoffsetof(state_t,misc2) },
		{ NULL, }
	};
	int result;
	state_t *info, dummy;

	if (frameNum >= 0 && frameNum < NUMSTATES) {
		info = &states[frameNum];
		DPrintf ("Frame %d\n", frameNum);
	} else {
		info = &dummy;
		Printf ("Frame %d out of range\n", frameNum);
	}

	while ((result = GetLine ()) == 1)
		if (HandleKey (keys, info, Line1, atoi (Line2)))
			Printf (unknown_str, Line1, "Frame", frameNum);

	return result;
}

static int PatchSprite (int sprNum)
{
	int result;
	int offset = 0;

	if (sprNum >= 0 && sprNum < NUMSPRITES) {
		DPrintf ("Sprite %d\n", sprNum);
	} else {
		Printf ("Sprite %d out of range.\n", sprNum);
		sprNum = -1;
	}

	while ((result = GetLine ()) == 1) {
		if (!stricmp ("Offset", Line1))
			offset = atoi (Line2);
		else Printf (unknown_str, Line1, "Sprite", sprNum);
	}

	if (offset > 0 && sprNum != -1) {
		// Calculate offset from beginning of sprite names.
		offset = (offset - toff[dversion] - 22044) / 8;

		if (offset >= 0 && offset < NUMSPRITES) {
			sprnames[sprNum] = OrgSprNames[offset];
		} else {
			Printf ("Sprite name %d out of range.\n", offset);
		}
	}

	return result;
}

static int PatchAmmo (int ammoNum)
{
	extern int clipammo[NUMAMMO];

	int result;
	int *max;
	int *per;
	int dummy;

	if (ammoNum >= 0 && ammoNum < NUMAMMO) {
		DPrintf ("Ammo %d.\n", ammoNum);
		max = &maxammo[ammoNum];
		per = &clipammo[ammoNum];
	} else {
		Printf ("Ammo %d out of range.\n", ammoNum);
		max = per = &dummy;
	}

	while ((result = GetLine ()) == 1) {
			 CHECKKEY ("Max ammo", *max)
		else CHECKKEY ("Per ammo", *per)
		else Printf (unknown_str, Line1, "Ammo", ammoNum);
	}

	return result;
}

static int PatchWeapon (int weapNum)
{
	static const struct Key keys[] = {
		{ "Ammo type",			myoffsetof(weaponinfo_t,ammo) },
		{ "Deselect frame",		myoffsetof(weaponinfo_t,upstate) },
		{ "Select frame",		myoffsetof(weaponinfo_t,downstate) },
		{ "Bobbing frame",		myoffsetof(weaponinfo_t,readystate) },
		{ "Shooting frame",		myoffsetof(weaponinfo_t,atkstate) },
		{ "Firing frame",		myoffsetof(weaponinfo_t,flashstate) },
		{ NULL, }
	};
	int result;
	weaponinfo_t *info, dummy;

	if (weapNum >= 0 && weapNum < NUMWEAPONS) {
		info = &weaponinfo[weapNum];
		DPrintf ("Weapon %d\n", weapNum);
	} else {
		info = &dummy;
		Printf ("Weapon %d out of range.\n", weapNum);
	}

	while ((result = GetLine ()) == 1)
		if (HandleKey (keys, info, Line1, atoi (Line2)))
			Printf (unknown_str, Line1, "Weapon", weapNum);

	return result;
}

static int PatchPointer (int ptrNum)
{
	int result;

	if (ptrNum >= 0 && ptrNum < 448) {
		DPrintf ("Pointer %d\n", ptrNum);
	} else {
		Printf ("Pointer %d out of range.\n", ptrNum);
		ptrNum = -1;
	}

	while ((result = GetLine ()) == 1) {
		if ((ptrNum != -1) && (!stricmp (Line1, "Codep Frame")))
			states[codepconv[ptrNum]].action = OrgActionPtrs[atoi (Line2)];
		else Printf (unknown_str, Line1, "Pointer", ptrNum);
	}
	return result;
}

static int PatchCheats (int dummy)
{
	static const struct {
		char *name;
		byte *cheatseq;
		BOOL needsval;
	} keys[] = {
		{ "Change music",		cheat_mus_seq,				 true },
		{ "Chainsaw",			cheat_choppers_seq,			 false },
		{ "God mode",			cheat_god_seq,				 false },
		{ "Ammo & Keys",		cheat_ammo_seq,				 false },
		{ "Ammo",				cheat_ammonokey_seq,		 false },
		{ "No Clipping 1",		cheat_noclip_seq,			 false },
		{ "No Clipping 2",		cheat_commercial_noclip_seq, false },
		{ "Invincibility",		cheat_powerup_seq[0],		 false },
		{ "Berserk",			cheat_powerup_seq[1],		 false },
		{ "Invisibility",		cheat_powerup_seq[2],		 false },
		{ "Radiation Suit",		cheat_powerup_seq[3],		 false },
		{ "Auto-map",			cheat_powerup_seq[4],		 false },
		{ "Lite-Amp Goggles",	cheat_powerup_seq[5],		 false },
		{ "BEHOLD menu",		cheat_powerup_seq[6],		 false },
		{ "Level Warp",			cheat_clev_seq,				 true },
		{ "Player Position",	cheat_mypos_seq,			 false },
		{ "Map cheat",			cheat_amap_seq,				 false },
		{ NULL, }
	};
	int result;

	DPrintf ("Cheats\n");

	while ((result = GetLine ()) == 1) {
		int i = 0;
		while (keys[i].name && stricmp (keys[i].name, Line1))
			i++;

		if (!keys[i].name)
			Printf ("Unknown cheat %s.\n", Line2);
		else
			ChangeCheat (Line2, keys[i].cheatseq, keys[i].needsval);
	}
	return result;
}

static int PatchMisc (int dummy)
{
	static const struct Key keys[] = {
		{ "Initial Health",			myoffsetof(struct DehInfo,StartHealth) },
		{ "Initial Bullets",		myoffsetof(struct DehInfo,StartBullets) },
		{ "Max Health",				myoffsetof(struct DehInfo,MaxHealth) },
		{ "Max Armor",				myoffsetof(struct DehInfo,MaxArmor) },
		{ "Green Armor Class",		myoffsetof(struct DehInfo,GreenAC) },
		{ "Blue Armor Class",		myoffsetof(struct DehInfo,BlueAC) },
		{ "Max Soulsphere",			myoffsetof(struct DehInfo,BlueAC) },
		{ "Soulsphere Health",		myoffsetof(struct DehInfo,SoulsphereHealth) },
		{ "Megasphere Health",		myoffsetof(struct DehInfo,MegasphereHealth) },
		{ "God Mode Health",		myoffsetof(struct DehInfo,GodHealth) },
		{ "IDFA Armor",				myoffsetof(struct DehInfo,FAArmor) },
		{ "IDFA Armor Class",		myoffsetof(struct DehInfo,FAAC) },
		{ "IDKFA Armor",			myoffsetof(struct DehInfo,KFAArmor) },
		{ "IDKFA Armor Class",		myoffsetof(struct DehInfo,KFAAC) },
		{ "BFG Cells/Shot",			myoffsetof(struct DehInfo,BFGCells) },
		{ "Monsters Infight",		myoffsetof(struct DehInfo,Infight) },
		{ NULL, }
	};
	int result;
	gitem_t *item;

	DPrintf ("Misc\n");

	while ((result = GetLine()) == 1)
		if (HandleKey (keys, &deh, Line1, atoi (Line2)))
			Printf ("Unknown miscellaneous info %s.\n", Line2);

	if ( (item = FindItem ("Basic Armor")) )
		item->offset = deh.GreenAC;

	if ( (item = FindItem ("Mega Armor")) )
		item->offset = deh.BlueAC;

	// 0xDD == enable infighting
	deh.Infight = deh.Infight == 0xDD ? 1 : 0;

	return result;
}

static int PatchPars (int dummy)
{
	char *space, mapname[8], *moredata;
	level_info_t *info;
	int result, par;

	DPrintf ("[Pars]\n");

	while ( (result = GetLine()) ) {
		// Argh! .bex doesn't follow the same rules as .deh
		if (result == 1) {
			Printf ("Unknown key in [PARS] section: %s\n", Line1);
			continue;
		}
		if (stricmp ("par", Line1))
			return result;

		space = strchr (Line2, ' ');

		if (!space) {
			Printf ("Need data after par.\n");
			continue;
		}

		*space++ = '\0';

		while (*space && isspace(*space))
			space++;

		moredata = strchr (space, ' ');

		if (moredata) {
			// At least 3 items on this line, must be E?M? format
			sprintf (mapname, "E%cM%c", *Line2, *space);
			par = atoi (moredata + 1);
		} else {
			// Only 2 items, must be MAP?? format
			sprintf (mapname, "MAP%02d", atoi(Line2) % 100);
			par = atoi (space);
		}

		if (!(info = FindLevelInfo (mapname)) ) {
			Printf ("No map %s\n", mapname);
			continue;
		}

		info->partime = par;
		DPrintf ("Par for %s changed to %d\n", mapname, par);
	}
	return result;
}

static int PatchCodePtrs (int dummy)
{
	int result;

	DPrintf ("[CodePtr]\n");

	while ((result = GetLine()) == 1) {
		if (!strnicmp ("Frame", Line1, 5) && isspace(Line1[5])) {
			int frame = atoi (Line1 + 5);

			if (frame < 0 || frame >= NUMSTATES) {
				Printf ("Frame %d out of range\n", frame);
			} else {
				int i = 0;
				char *data;

				COM_Parse (Line2);

				if ((com_token[0] == 'A' || com_token[0] == 'a') && com_token[1] == '_')
					data = com_token + 2;
				else
					data = com_token;

				while (CodePtrs[i].name && stricmp (CodePtrs[i].name, Line2))
					i++;

				if (CodePtrs[i].name) {
					states[frame].action.acp1 = CodePtrs[i].func.acp1;
					DPrintf ("Frame %d set to %s\n", frame, CodePtrs[i].name);
				} else {
					states[frame].action.acp1 = NULL;
					DPrintf ("Unknown code pointer: %s\n", Line2);
				}
			}
		}
	}
	return result;
}

static int PatchText (int oldSize)
{
	int newSize;
	char *oldStr;
	char *newStr;
	char *temp;
	BOOL good;
	int result;
	int i;

	temp = COM_Parse (Line2);		// Skip old size, since we already have it
	if (!COM_Parse (temp)) {
		Printf ("Text chunk is missing size of new string.\n");
		return 2;
	}
	newSize = atoi (com_token);

	oldStr = malloc (oldSize + 1);
	newStr = malloc (newSize + 1);

	if (!oldStr || !newStr) {
		Printf ("Out of memory.\n");
		goto donewithtext;
	}

	good = ReadChars (&oldStr, oldSize);
	good += ReadChars (&newStr, newSize);

	if (!good) {
		free (newStr);
		free (oldStr);
		Printf ("Unexpected end-of-file.\n");
		return 0;
	}

	if (includenotext) {
		Printf ("Skipping text chunk in included patch.\n");
		goto donewithtext;
	}

	DPrintf ("Searching for text:\n%s\n", oldStr);
	good = false;


	// Search through sfx names
#if 0
	for (i = 0; i < NUMSFX; i++) {
		if (S_sfx[i].name) {
			if (!strcmp (S_sfx[i].name, oldStr)) {
				S_sfx[i].name = copystring (newStr);
				good = true;
				// Yes, we really need to check them all. A sound patch could
				// have created two sounds that point to the same name, and
				// stopping at the first would miss the change to the second.
			}
		}
	}
	if (good)
		goto donewithtext;
#endif


	// Search through sprite names
	for (i = 0; i < NUMSPRITES; i++) {
		if (!strcmp (sprnames[i], oldStr)) {
			sprnames[i] = copystring (newStr);
			good = true;
			// See above.
		}
	}

	if (good)
		goto donewithtext;


	// Search through music names.
	// This is something of an even bigger hack
	// since I changed the way music is handled.
	if (oldSize < 7) {		// Music names are never >6 chars
		if ( (temp = malloc (oldSize + 3)) ) {
			level_info_t *info = LevelInfos;
			sprintf (temp, "d_%s", oldStr);

			while (info->level_name) {
				if (!strnicmp (info->music, temp, 8)) {
					good = true;
					strncpy (info->music, temp, 8);
				}
				info++;
			}

			free (temp);
		}
	}

	if (good)
		goto donewithtext;

	
	// Search through most other texts
	for (i = 0; i < NUMSTRINGS; i++) {
		if (!stricmp (Strings[i].builtin, oldStr)) {
			ReplaceString (&Strings[i].string, newStr);
			Strings[i].type = str_patched;
			good = true;
			break;
		}
	}

	if (!good)
		DPrintf ("   (Unmatched)\n");

donewithtext:
	if (newStr)
		free (newStr);
	if (oldStr)
		free (oldStr);

	// Fetch next identifier for main loop
	while ((result = GetLine ()) == 1)
		;

	return result;
}

static int PatchStrings (int dummy)
{
	static int maxstrlen = 128;
	static char *holdstring;
	int result;

	DPrintf ("[Strings]\n");

	if (!holdstring)
		holdstring = Malloc (maxstrlen);

	while ((result = GetLine()) == 1) {
		int i;

		*holdstring = '\0';
		do {
			while (maxstrlen < strlen (holdstring) + strlen (Line2)) {
				maxstrlen += 128;
				holdstring = Realloc (holdstring, maxstrlen);
			}
			strcat (holdstring, skipwhite (Line2));
			stripwhite (holdstring);
			if (holdstring[strlen(holdstring)-1] == '\\') {
				holdstring[strlen(holdstring)-1] = '\0';
				Line2 = igets ();
			} else
				Line2 = NULL;
		} while (Line2 && *Line2);

		for (i = 0; i < NUMSTRINGS; i++)
			if (!stricmp (Strings[i].name, Line1))
				break;

		if (i == NUMSTRINGS) {
			Printf ("Unknown string: %s\n", Line1);
		} else {
			ReplaceSpecialChars (holdstring);
			ReplaceString (&Strings[i].string, copystring (holdstring));
			Strings[i].type = str_patched;
			Printf ("%s set to:\n%s\n", Line1, holdstring);
		}
	}

	return result;
}

static int DoInclude (int dummy)
{
	char *data;
	int savedversion, savepversion;
	char *savepatchfile, *savepatchpt;

	if (including) {
		Printf ("Sorry, can't nest includes\n");
		goto endinclude;
	}

	data = COM_Parse (Line2);
	if (!stricmp (com_token, "notext")) {
		includenotext = true;
		data = COM_Parse (data);
	}

	if (!com_token[0]) {
		includenotext = false;
		Printf ("Include directive is missing filename\n");
		goto endinclude;
	}

	DPrintf ("Including %s\n", com_token);
	savepatchfile = PatchFile;
	savepatchpt = PatchPt;
	savedversion = dversion;
	savepversion = pversion;
	including = true;

	DoDehPatch (com_token, false);

	DPrintf ("Done with include\n");
	PatchFile = savepatchfile;
	PatchPt = savepatchpt;
	dversion = savedversion;
	pversion = savepversion;

endinclude:
	including = false;
	includenotext = false;
	return GetLine();
}

void DoDehPatch (char *patchfile, BOOL autoloading)
{
	char file[256];
	int cont;
	int filelen;
	int lump;

	BackUpData ();
	PatchFile = NULL;

	lump = W_CheckNumForName ("DEHACKED");

	if (lump >= 0 && autoloading) {
		// Execute the DEHACKED lump as a patch.
		filelen = W_LumpLength (lump);
		if ( (PatchFile = malloc (filelen + 1)) ) {
			W_ReadLump (lump, PatchFile);
		} else {
			Printf ("Not enough memory to apply patch\n");
			return;
		}
	} else if (patchfile) {
		// Try to use patchfile as a patch.
		FILE *deh;

		strcpy (file, patchfile);
		FixPathSeperator (file);
		DefaultExtension (file, ".deh");

		if ( !(deh = fopen (file, "rb")) ) {
			strcpy (file, patchfile);
			FixPathSeperator (file);
			DefaultExtension (file, ".bex");
			deh = fopen (file, "rb");
		}

		if (deh) {
			filelen = Q_filelength (deh);
			if ( (PatchFile = malloc (filelen + 1)) ) {
				fread (PatchFile, 1, filelen, deh);
				fclose (deh);
			}
		}

		if (!PatchFile) {
			// Couldn't find it on disk, try reading it from a lump
			strcpy (file, patchfile);
			FixPathSeperator (file);
			ExtractFileBase (file, file);
			file[8] = 0;
			lump = W_CheckNumForName (file);
			if (lump >= 0) {
				filelen = W_LumpLength (lump);
				if ( (PatchFile = malloc (filelen + 1)) ) {
					W_ReadLump (lump, PatchFile);
				} else {
					Printf ("Not enough memory to apply patch\n");
					return;
				}
			}
		}

		if (!PatchFile) {
			Printf ("Could not open DeHackEd patch \"%s\"\n", file);
			return;
		}
	} else {
		// Nothing to do.
		return;
	}

	// End file with a NULL for our parser
	PatchFile[filelen] = 0;

	dversion = pversion = -1;

	cont = 0;
	if (!strncmp (PatchFile, "Patch File for DeHackEd v", 25)) {
		PatchPt = strchr (PatchFile, '\n');
		while ((cont = GetLine()) == 1) {
				 CHECKKEY ("Doom version", dversion)
			else CHECKKEY ("Patch format", pversion)
		}
		if (!cont || dversion == -1 || pversion == -1) {
			free (PatchFile);
			Printf ("\"%s\" is not a DeHackEd patch file\n");
			return;
		}
	} else {
		DPrintf ("Patch does not have DeHackEd signature. Assuming .bex\n");
		dversion = 19;
		pversion = 6;
		PatchPt = PatchFile;
		while ((cont = GetLine()) == 1)
			;
	}

	if (pversion != 6) {
		Printf ("DeHackEd patch version is %d.\nUnexpected results may occur.\n", pversion);
	}

	if (dversion == 16)
		dversion = 0;
	else if (dversion == 17)
		dversion = 2;
	else if (dversion == 19)
		dversion = 3;
	else if (dversion == 20)
		dversion = 1;
	else if (dversion == 21)
		dversion = 4;
	else {
		Printf ("Patch created with unknown DOOM version.\nAssuming version 1.9.\n");
		dversion = 3;
	}

	do {
		if (cont == 1) {
			Printf ("Key %s encountered out of context\n", Line1);
			cont = 0;
		} else if (cont == 2)
			cont = HandleMode (Line1, atoi (Line2));
	} while (cont);

	free (PatchFile);
	Printf ("Patch installed\n");
}